:root {
    /* Generic Variables (Fonts, Spacing, Z-index) */
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --sl-z-index-popover: 10000;
}

html {
    scrollbar-gutter: stable;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    margin: 0;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-gutter: stable;
    background-attachment: fixed;
}

/* Prevent Shoelace from adding layout-shifting padding when scroll-locked */
body.sl-scroll-lock {
    padding-right: 0 !important;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:visited {
    color: var(--accent);
}

a:hover {
    filter: brightness(1.2);
}



/* FOUC Guard */
[v-cloak] {
    display: none !important;
}



body.is-booting {
    overflow: hidden !important;
}

#app {
    transition: opacity 0.5s ease-out;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Industrial Splash Screen */
.boot-splash {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    transition: opacity 0.4s ease-out, visibility 0.4s;
    background-color: var(--bg);
    background-image: radial-gradient(at 0% 0%, rgba(79, 70, 229, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(14, 165, 233, 0.15) 0px, transparent 50%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.boot-splash.hidden {
    opacity: 0;
    visibility: hidden;
}

.splash-banner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -1;
    opacity: 0.15;
    pointer-events: none;
    object-fit: cover;
    /* filter: saturate(0) contrast(1.2); */
}

.splash-logo {
    font-size: 3.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, #2563eb, #38bdf8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 15px rgba(56, 189, 248, 0.4));
    animation: pulse 2s infinite ease-in-out;
}

.splash-description {
    color: var(--text-muted);
    font-size: 1rem;
    margin: 0.5rem 0 2rem 0;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-align: center;
    max-width: 80%;
}

.splash-loader {
    width: 200px;
    height: 2px;
    background: var(--glass-border);
    position: relative;
    overflow: hidden;
    border-radius: 1px;
}

.splash-loader::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent);
    animation: loading 1.5s infinite ease-in-out;
    box-shadow: 0 0 10px var(--accent);
}

.splash-status {
    margin-top: 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-muted);
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.7;
        transform: scale(0.98);
    }
}

@keyframes loading {
    0% {
        left: -100%;
    }

    50% {
        left: 0%;
    }

    100% {
        left: 100%;
    }
}

/* Utility Class */
.subtle-help {
    color: var(--text-muted);
    font-size: 0.8rem;
    /* opacity: 0.5 !important; */
    margin-top: 0.25rem;
    font-weight: 400;
}

/* Dark Theme (Default) Variables */
[data-theme="dark"] {
    /* Core Theme Colors */
    --primary: #64748b;
    /* Slate 500 */
    --primary-hover: #475569;
    /* Slate 600 */
    --bg: #0f172a;
    /* Slate 900 */
    --glass: rgba(30, 41, 59, 0.7);
    /* Slate 800 with opacity */
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-surface: rgba(30, 41, 59, 0.9);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text: #e2e8f0;
    /* Slate 50 */
    --text-muted: #94a3b8;
    /* Slate 400 */
    --accent: #38bdf8;
    /* Sky 400 */
    --success: #10b981;
    /* Emerald 500 */
    --warning: #f59e0b;
    /* Amber 500 */
    --error: #ef4444;
    /* Red 500 */

    /* Shoelace Overrides for Dark Theme */
    --sl-color-neutral-0: var(--bg);
    --sl-color-neutral-50: #1e293b;
    --sl-color-neutral-100: #334155;
    --sl-color-neutral-200: #475569;
    --sl-color-neutral-300: #64748b;
    --sl-color-neutral-400: #94a3b8;
    --sl-color-neutral-500: #cbd5e1;
    --sl-color-neutral-600: #e2e8f0;
    --sl-color-neutral-700: #f1f5f9;
    --sl-color-neutral-800: #f8fafc;
    --sl-color-neutral-900: #ffffff;

    --sl-color-primary-600: var(--accent);
    --sl-color-primary-500: #0ea5e9;
    /* Sky 500 */
    --sl-color-primary-700: #0284c7;

    --sl-panel-background-color: var(--glass-surface);
    --sl-input-background-color: rgba(0, 0, 0, 0.2);
    --sl-input-border-color: var(--glass-border);
    --sl-input-color: #cbd5e1;
    /* Subtle Slate 300 */
    --sl-input-placeholder-color: var(--text-muted);

    --transparent-white: #ffffff35;
}


[data-theme="dark"] body {
    background-color: var(--bg);
    background-image: radial-gradient(at 0% 0%, rgba(79, 70, 229, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(14, 165, 233, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text);
    scrollbar-color: var(--glass-border) transparent;
}

/* Industrial White Theme Overrides */
[data-theme="light"] {
    --bg: #f8fafc;
    /* Slate 50 */
    --glass: rgba(255, 255, 255, 0.7);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-surface: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.1);
    --text: #1e293b;
    /* Slate 800 */
    --text-muted: #64748b;
    /* Slate 500 */
    --accent: #0284c7;
    /* Sky 700 - darker for readability */

    /* Shoelace Light Theme Sync (Inverted for Contrast) */
    --sl-color-neutral-0: #ffffff;
    --sl-color-neutral-50: #f8fafc;
    --sl-color-neutral-100: #f1f5f9;
    --sl-color-neutral-200: #e2e8f0;
    --sl-color-neutral-300: #cbd5e1;
    --sl-color-neutral-400: #94a3b8;
    --sl-color-neutral-500: #64748b;
    --sl-color-neutral-600: #475569;
    --sl-color-neutral-700: #334155;
    --sl-color-neutral-800: #1e293b;
    --sl-color-neutral-900: #0f172a;
    --sl-color-neutral-950: #020617;

    --sl-input-background-color: #f1f5f9;
    /* Slate 100 */
    --sl-input-border-color: #cbd5e1;
    --sl-input-color: #0f172a;
    --sl-input-placeholder-color: #64748b;
    /* Slate 500 - Darker for visibility */

    /* Syntax Highlighting Overrides for Light Mode */
    --hl-op: #0284c7;
    /* Sky 700 */
    --hl-num: #0f172a;
    /* Slate 900 */
    --hl-func: #475569;
    /* Slate 600 */
    --hl-bool: #be123c;
    /* Rose 700 */
    --hl-var: #2563eb;
    /* Blue 600 */
    --hl-str: #b45309;
    /* Amber 700 */
    --hl-unknown: #e11d48;
    /* Rose 600 */

    --success: #10b981;
    /* Emerald 500 */
    --warning: #f59e0b;
    /* Amber 500 */
    --error: #ef4444;
    /* Red 500 */

    /* Document/Card Overrides */
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] body {
    background-color: var(--bg);
    background-image: radial-gradient(at 0% 0%, rgba(79, 70, 229, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(14, 165, 233, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text);
}

/* Light Theme Syntax Mappings */
[data-theme="light"] .hl-op {
    color: var(--hl-op);
}

[data-theme="light"] .hl-num {
    color: var(--hl-num);
}

[data-theme="light"] .hl-func {
    color: var(--hl-func);
}

[data-theme="light"] .hl-bool {
    color: var(--hl-bool);
}

[data-theme="light"] .hl-var {
    color: var(--hl-var);
}

[data-theme="light"] .hl-str {
    color: var(--hl-str);
}

[data-theme="light"] .hl-unknown {
    color: var(--hl-unknown);
}

/* Light Theme Component Overrides */
[data-theme="light"] .syntax-editor,
[data-theme="light"] .result-box,
[data-theme="light"] .history-item {
    background: rgba(255, 255, 255, 0.2);
    /* Slate 50 */
    border: 1px solid #cbd5e1;
    /* Slate 300 */
}

[data-theme="light"] .syntax-editor:focus-within {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: var(--accent);
}

[data-theme="light"] .result-value {
    color: #0f172a;
    /* Slate 900 */
    font-weight: 600;
}

[data-theme="light"] sl-card::part(base),
[data-theme="light"] sl-dialog::part(panel) {
    /* Premium 3D Glass Effect */
    background: linear-gradient(135deg,
            rgba(255, 255, 255, 0.6) 0%,
            rgba(255, 255, 255, 0.3) 100%) !important;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.4) !important;
    box-shadow:
        0 8px 32px 0 rgba(31, 38, 135, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2) !important;
}

/* Semi-transparent inputs for synergy */
[data-theme="light"] sl-input::part(base),
[data-theme="light"] sl-textarea::part(base),
[data-theme="light"] sl-select::part(combobox),
[data-theme="light"] .syntax-editor {
    background: rgba(255, 255, 255, 0.3) !important;
    /* Very transparent to blend with glass */
    backdrop-filter: none;
    transition: all 0.2s ease;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.02);

    border-color: #cbd5e1 !important;
    background: rgba(255, 255, 255, 0.3) !important;
}

[data-theme="light"] sl-input:focus-within::part(base),
[data-theme="light"] sl-textarea:focus-within::part(base),
[data-theme="light"] sl-select:focus-within::part(combobox),
[data-theme="light"] .syntax-editor:focus-within {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: var(--accent) !important;
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.15);
}

/* Light Theme Settings Presets (Buttons) */
[data-theme="light"] .settings-presets sl-button::part(base) {
    background-color: rgba(255, 255, 255, 0.2) !important;
    border-color: rgba(203, 213, 225, 0.6) !important;
    color: #475569 !important;
}

[data-theme="light"] .settings-presets sl-button:hover::part(base) {
    background-color: rgba(255, 255, 255, 0.5) !important;
    border-color: var(--accent) !important;
    color: var(--accent) !important;
}

/* Selected Preset Logic (Primary Variant) */
/* Selected Preset Logic (Primary Variant) */
[data-theme="light"] .settings-presets sl-button[variant="primary"]:not([outline])::part(base) {
    background: rgba(59, 130, 246, 0.1) !important;
    border-color: rgba(59, 130, 246, 0.3) !important;
    color: var(--accent) !important;
    transition: all 0.2s ease !important;
    font-weight: 600;
}

/* Stepper Buttons in Settings */
[data-theme="light"] .btn-stepper::part(base) {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: rgba(203, 213, 225, 0.6) !important;
}

[data-theme="light"] .btn-stepper:hover::part(base) {
    background: rgba(255, 255, 255, 0.6) !important;
    border-color: var(--accent) !important;
}

[data-theme="light"] sl-dialog::part(title) {
    color: #0f172a;
    /* Slate 900 */
}

/* Light Theme Dialog Internals */
[data-theme="light"] sl-tab-panel {
    background: transparent !important;
}

[data-theme="light"] .docs-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom-color: #cbd5e1;
}

[data-theme="light"] .ops-table th {
    background: #f1f5f9;
    /* Slate 100 */
    color: #475569;
    /* Slate 600 */
    border-bottom-color: #cbd5e1;
}

[data-theme="light"] .ops-table td {
    color: #334155;
    /* Slate 700 */
    border-bottom-color: #b5bbc385
}

[data-theme="light"] .sortable-header:hover {
    background-color: #e2e8f0 !important;
    color: #0f172a;
}

[data-theme="light"] .doc-item {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid #cbd5e1;
}

[data-theme="light"] .doc-item strong {
    color: #0369a1;
    /* Sky 700 */
}

/* Light Theme Lists & Controls */
[data-theme="light"] .doc-card {
    background: rgba(255, 255, 255, 0.3) !important;
    border: 1px solid #cbd5e1;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .doc-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
    /* transform: translateY(-1px); */
    /* box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); */
}

[data-theme="light"] .doc-name {
    color: #0f172a;
    font-weight: 600;
}

[data-theme="light"] .doc-desc {
    color: #475569;
}

[data-theme="light"] sl-input::part(base),
[data-theme="light"] sl-select::part(combobox),
[data-theme="light"] sl-textarea::part(base) {
    background: rgba(255, 255, 255, 0.3) !important;
    border-color: #cbd5e1;
    color: #0f172a;
}

[data-theme="light"] sl-input:focus-within::part(base),
[data-theme="light"] sl-select[open]::part(combobox),
[data-theme="light"] sl-textarea:focus-within::part(base) {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.2) !important;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="light"] sl-button[variant="neutral"][outline]::part(base) {
    border-color: #cbd5e1;
    color: #475569;
}

[data-theme="light"] sl-button[variant="neutral"][outline]:hover::part(base) {
    background: #f1f5f9;
    border-color: #94a3b8;
    color: #0f172a;
}

[data-theme="light"] sl-button.btn-clear-all:hover::part(base) {
    color: #ef4444 !important;
    /* Red 500 */
    border-color: #ef4444 !important;
    background-color: #fee2e2 !important;
    /* Red 100 */
    box-shadow: 0 4px 6px -1px rgba(239, 68, 68, 0.2) !important;
}

/* Force override for inputs and stepper buttons */
[data-theme="light"] sl-input::part(base) {
    background: rgba(255, 255, 255, 0.3) !important;
    border-color: #cbd5e1 !important;
    color: #0f172a !important;
    backdrop-filter: none;
}

[data-theme="light"] sl-select::part(combobox),
[data-theme="light"] sl-textarea::part(base),
[data-theme="light"] sl-input:has(.btn-stepper)::part(base) {
    background: rgba(255, 255, 255, 0.1) !important;
    border-color: #cbd5e1 !important;
    color: #0f172a !important;
    backdrop-filter: none;
}

[data-theme="light"] .combobox-trigger,
[data-theme="light"] .result-box,
[data-theme="light"] .history-item {
    background: rgba(255, 255, 255, 0.3) !important;
    border-color: #cbd5e1 !important;
    color: #0f172a !important;
    backdrop-filter: none;
}

/* Hover States for Interactive Elements */
[data-theme="light"] .combobox-trigger:hover,
[data-theme="light"] .history-item:hover {
    background: rgb(255 255 255 / 10%) !important;
    border-color: var(--accent) !important;
}

/* Ensure Input Text is Dark in Light Theme */
[data-theme="light"] sl-input::part(input),
[data-theme="light"] sl-textarea::part(textarea),
[data-theme="light"] sl-select::part(display-input),
[data-theme="light"] sl-select::part(combobox) {
    color: #0f172a !important;
    -webkit-text-fill-color: #0f172a !important;
}

/* Specific Fix for Dialog Inputs (Name, etc.) */
[data-theme="light"] .snippet-form sl-input::part(input),
[data-theme="light"] .settings-form sl-input::part(input),
[data-theme="light"] .u-dialog-content sl-input::part(input) {
    color: #0f172a !important;
    -webkit-text-fill-color: #0f172a !important;
    background-color: transparent !important;
}

[data-theme="light"] .btn-stepper::part(base) {
    background: #f1f5f9;
    /* Slate 100 */
    border: 1px solid #cbd5e1;
    color: #475569;
}

[data-theme="light"] .btn-stepper:hover::part(base) {
    background: #e2e8f0;
    /* Slate 200 */
    color: #0f172a;
}

/* Light Theme Dropdown Menus */
[data-theme="light"] sl-select::part(listbox) {
    background: linear-gradient(135deg, rgba(222, 225, 229, 0.7) 0%, rgba(230, 232, 234, 0.4) 100%) !important;
    backdrop-filter: blur(24px) !important;
    -webkit-backdrop-filter: blur(24px) !important;
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
    box-shadow:
        0 8px 32px 0 rgba(31, 38, 135, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2) !important;
}

[data-theme="light"] sl-option::part(base) {
    background-color: transparent;
    color: #475569;
}

/* Light Theme Result & Copy Button (Green) */
[data-theme="light"] .result-value {
    color: #059669 !important;
    /* Emerald 600 */
}

[data-theme="light"] .result-box.error .result-value {
    color: #ef4444 !important;
    /* Red 500 */
}

[data-theme="light"] .copy-btn::part(base) {
    color: var(--text-muted);
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--sl-transition-fast) color, var(--sl-transition-fast) background-color;
    border-radius: var(--sl-border-radius-medium);
}

[data-theme="light"] .copy-btn:hover::part(base) {
    color: #059669 !important;
    /* Emerald 600 */
    background-color: #ecfdf5 !important;
    /* Emerald 50 */
}

[data-theme="light"] sl-option::part(base):hover,
[data-theme="light"] sl-option[current]::part(base) {
    /* background-color: #f1f5f9; */
    background-color: rgb(0 0 0 / 3%);
    /* Slate 100 */
    color: #0f172a;
}

[data-theme="light"] sl-option[checked]::part(base) {
    background-color: #e2e8f0;
    /* Slate 200 */
    color: #0f172a;
    font-weight: 600;
}

/* Light Theme Expression Combobox */
[data-theme="light"] .modern-select sl-menu,
[data-theme="light"] .combobox-panel,
[data-theme="light"] .modern-select::part(panel) {
    background: linear-gradient(135deg, rgb(220 220 220 / 60%) 0%, rgb(229 229 229 / 30%) 100%) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
}

/* Light Theme Settings Text Contrast */
[data-theme="light"] .form-group label {}

[data-theme="light"] .subtle-help {
    color: #64748b !important;
    /* Slate 500 */
}

[data-theme="light"] .setting-icon,
[data-theme="light"] .doc-header-icon {
    filter: brightness(0.2) saturate(0) !important;
    /* Turn light gray icons dark/black */
}

/* Settings Preset Buttons (Light Theme) */
[data-theme="light"] .settings-presets sl-button[variant="primary"][outline]::part(base) {
    border-color: #cbd5e1 !important;
    color: #475569 !important;
    /* Slate 600 */
    background: rgba(255, 255, 255, 0.2) !important;
}

[data-theme="light"] .settings-presets sl-button[variant="primary"][outline]:hover::part(base),
[data-theme="light"] .settings-presets sl-button[variant="primary"][outline][class*="button--outline"]::part(base):hover {
    background: #e2e8f0 !important;
    /* Slate 200 */
    color: #0f172a !important;
    border-color: #94a3b8 !important;
}

/* History Stepper Buttons in Settings */
[data-theme="light"] .form-group sl-button.btn-stepper::part(base) {
    color: #475569 !important;
    border-color: #cbd5e1 !important;
}

[data-theme="light"] .form-group sl-button.btn-stepper:hover::part(base) {
    background: #f1f5f9 !important;
    color: #0f172a !important;
}

[data-theme="light"] .action-btn.pinned::part(base) {
    color: var(--warning, #f59e0b) !important;
    /* Amber 700 for better contrast on white */

    &:hover {
        color: var(--warning, #f59e0b) !important;
    }
}

/* Light Theme About Tab */
[data-theme="light"] .about-section,
[data-theme="light"] .about-content-area,
[data-theme="light"] .about-block {
    color: #475569;
    /* Slate 600 */
}

[data-theme="light"] .about-section strong,
[data-theme="light"] .about-block strong {
    color: #0f172a;
    /* Slate 900 */
}

[data-theme="light"] .about-link {
    color: var(--sl-color-primary-600);
    text-decoration: none;
    transition: color 0.2s ease, text-decoration 0.2s ease;
}

[data-theme="light"] .about-link:hover {
    filter: brightness(1.2);
}

[data-theme="light"] .about-icon,
[data-theme="light"] .alert-icon {
    filter: brightness(0.2) saturate(0) !important;
}

[data-theme="light"] .about-alert {
    background: rgba(245, 158, 11, 0.1);
    /* Slightly darker bg for contrast */
    border-color: rgba(245, 158, 11, 0.3);
}

[data-theme="light"] .about-alert strong {
    color: #b45309;
    /* Amber 700 */
}

[data-theme="light"] .about-footer {
    border-top-color: #cbd5e1;
}

[data-theme="light"] .about-footer sl-button::part(base) {
    color: #475569;
    border-color: #cbd5e1;
    background: #ffffff35;
}

[data-theme="light"] .about-footer sl-button:hover::part(base) {
    color: #0f172a;
    background: #f1f5f9;
    border-color: #94a3b8;
}

[data-theme="light"] sl-menu-item::part(base),
[data-theme="light"] sl-menu-label::part(base) {
    color: #475569;
    /* Slate 600 */
    background: transparent;
}

/* Light Theme Brand Button Hovers */
[data-theme="light"] .brand-github:hover::part(base),
[data-theme="light"] .brand-x:hover::part(base) {
    border-color: #0f172a !important;
    /* Slate 900 */
    color: #0f172a !important;
    background: #e2e8f0 !important;
    /* Slate 200 */
}

[data-theme="light"] .brand-github sl-icon,
[data-theme="light"] .brand-x sl-icon {
    filter: brightness(0.1) saturate(0) !important;
    /* Turn white icons black */
}

[data-theme="light"] .brand-nuget:hover::part(base) {
    background: rgba(0, 72, 128, 0.1) !important;
    border-color: #004880 !important;
    color: #004880 !important;
}

[data-theme="light"] .brand-vibe:hover::part(base) {
    background: rgba(236, 72, 153, 0.1) !important;
}

/* Light Theme Action Buttons (Docs, History, Library) */
[data-theme="light"] .btn-secondary::part(base),
[data-theme="light"] .doc-action-btn::part(base) {
    background-color: rgba(255, 255, 255, 0.3) !important;
    border-color: #cbd5e1 !important;
    color: #475569 !important;
    /* Slate 600 */
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .btn-secondary:hover::part(base),
[data-theme="light"] .doc-action-btn:hover::part(base) {
    background-color: #f1f5f935 !important;
    /* Slate 100 */
    border-color: #94a3b8 !important;
    color: #0f172a !important;
    /* Slate 900 */
}

/* Light Theme Table Icons (Edit/Delete) */
[data-theme="light"] sl-icon-button::part(base) {
    color: #64748b !important;
    /* Slate 500 */
}

[data-theme="light"] sl-icon-button.pin-btn:hover::part(base) {
    color: #f59e0b !important;
}

[data-theme="light"] sl-icon-button:hover::part(base) {
    color: var(--accent) !important;
    /* Slate 900 */
    /* background-color: #f1f5f9 !important; */
    background: transparent !important;
}

[data-theme="light"] sl-icon-button.danger-icon:hover::part(base) {
    color: #ef4444 !important;
    /* Red 500 */
    /* //background-color: #fef2f2 !important; */
    background: transparent !important;
    /* Red 50 */
}

/* Light Theme Tooltips */
[data-theme="light"] sl-tooltip {
    --sl-tooltip-background-color: #ffffff60 !important;
    --sl-tooltip-color: #0f172a !important;
    /* Slate 900 */
    --sl-tooltip-arrow-size: 6px;
    --sl-tooltip-padding: 0.5rem 0.75rem;
    --sl-tooltip-border-radius: 6px;
}

[data-theme="light"] sl-tooltip::part(body) {
    background-color: #ffffff60 !important;
    color: #0f172a !important;
    border: 1px solid #cbd5e1 !important;
    /* Slate 300 */
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
    font-weight: 500;
}

[data-theme="light"] sl-menu-item::part(base):hover,
[data-theme="light"] .snippet-item.is-selected::part(base) {
    background: #f1f5f9 !important;
    /* Slate 100 */
    color: #0f172a !important;
}

/* Settings Cancel, Test, and Dialog Cancel - Premium Glass */
[data-theme="light"] .btn-cancel::part(base),
[data-theme="light"] .btn-cancel-settings::part(base),
[data-theme="light"] .btn-test::part(base) {
    background-color: rgba(255, 255, 255, 0.05) !important;
    border: 1px solid rgba(148, 163, 184, 0.4) !important;
    color: #475569 !important;
    font-weight: 500;
    transition: all 0.2s ease !important;
}

[data-theme="light"] .btn-cancel:not([disabled])::part(base):hover,
[data-theme="light"] .btn-cancel-settings:not([disabled])::part(base):hover,
[data-theme="light"] .btn-test:not([disabled])::part(base):hover {
    background-color: rgba(255, 255, 255, 0.4) !important;
    border-color: rgba(148, 163, 184, 0.8) !important;
    color: #0f172a !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transform: none !important;
}

[data-theme="light"] .btn-cancel::part(label),
[data-theme="light"] .btn-cancel-settings::part(label),
[data-theme="light"] .btn-test::part(label) {
    background-color: transparent !important;
}

/* Light Theme Category Selection */
[data-theme="light"] .icon-tile::part(button) {
    color: #475569 !important;
    /* Slate 600 - Darker than 500 */
    border-color: #cbd5e1 !important;
    /* Slate 300 - Visible border */
    background: #f8fafc30 !important;
    /* Very light slate bg */
    opacity: 1 !important;
    /* Ensure no opacity reduction */
}

[data-theme="light"] .icon-tile:hover::part(button) {
    background: #e2e8f0 !important;
    color: #0f172a !important;
    border-color: #94a3b8 !important;
}

[data-theme="light"] .icon-tile[checked]::part(button) {
    background: rgba(59, 130, 246, 0.1) !important;
    border-color: rgba(59, 130, 246, 0.3) !important;
    color: var(--accent) !important;
    box-shadow: none !important;
}

[data-theme="light"] sl-menu-label {
    color: #94a3b8 !important;
    /* Slate 400 */
}

[data-theme="light"] .snippet-preview {
    color: #64748b;
    /* Slate 500 */
    background: #f8fafc;
    /* Slate 50 */
    border: 1px solid #e2e8f0;
}

[data-theme="light"] .section-icon {
    color: #475569 !important;
    /* Slate 600 - High visibility */
    opacity: 1 !important;
}

/* Light Theme Badges (Softer Look) */
[data-theme="light"] .shy-badge::part(base),
[data-theme="light"] .stats-badge::part(base),
[data-theme="light"] .result-type-badge::part(base),
[data-theme="light"] .result-type-badge-sm::part(base),
[data-theme="light"] .doc-category::part(base),
[data-theme="light"] .op-category::part(base) {
    background-color: rgba(241, 245, 249, 0.4) !important;
    /* Slate 100 at 90% Opacity */
    border: 1px solid #cbd5e1 !important;
    /* Slate 300 */
    color: #475569 !important;
    /* Slate 600 */
    box-shadow: none !important;
    /* backdrop-filter: blur(4px); */
    /* -webkit-backdrop-filter: blur(4px); */
    /* backdrop-filter: blur(4px); */
    /* -webkit-backdrop-filter: blur(4px); */
}

/* Light Theme "Premium" Hover (Crystal White) */
[data-theme="light"] .btn-calculate::part(base):hover,
[data-theme="light"] .btn-save-settings::part(base):hover,
[data-theme="light"] .premium-save-btn::part(base):hover {
    background-color: #5A6268;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .btn-calculate::part(base),
[data-theme="light"] .btn-save-settings::part(base),
[data-theme="light"] .premium-save-btn::part(base) {
    /* Base styles */
    background-color: #6C757D;
    /* A neutral gray */
    color: white;
    padding: 12px 24px;
    border: none;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    /* For smooth transitions */
    height: 40px !important;
}

/* Light Theme Validation Messages (Inverted - Dark Bg / Light Text) */
[data-theme="light"] .validation-result.valid {
    background-color: #059669 !important;
    /* Emerald 600 */
    border: 1px solid #059669 !important;
    color: var(--text) !important;
}

[data-theme="light"] .validation-result.valid .valid-icon {
    color: var(--text) !important;
}

[data-theme="light"] .validation-result.invalid {
    background-color: #dc2626 !important;
    /* Red 600 */
    border: 1px solid #dc2626 !important;
    color: var(--text) !important;
}

[data-theme="light"] .validation-result.invalid .invalid-icon,
[data-theme="light"] .validation-result.invalid .error-list {
    color: var(--text) !important;
}

/* --- Utilities --- */
.u-flex {
    display: flex;
}

.u-flex-col {
    display: flex;
    flex-direction: column;
}

.u-items-center {
    align-items: center;
}

.u-items-baseline {
    align-items: baseline;
}

.u-items-start {
    align-items: flex-start;
}

.u-items-end {
    align-items: flex-end;
}

.u-justify-between {
    justify-content: space-between;
}

.u-justify-end {
    justify-content: flex-end;
}

.u-justify-center {
    justify-content: center;
}

.u-gap-025 {
    gap: 0.25rem;
}

.u-gap-05 {
    gap: 0.5rem;
}

.u-gap-075 {
    gap: 0.75rem;
}

.u-gap-1 {
    gap: 1rem;
}

.u-mt-05 {
    margin-top: 0.5rem;
}

.u-mt-1 {
    margin-top: 1rem;
}

.u-mt-15 {
    margin-top: 1.5rem;
}

.u-mt-2 {
    margin-top: 2rem;
}

.u-mb-05 {
    margin-bottom: 0.5rem;
}

.u-mb-1 {
    margin-bottom: 1rem;
}

.u-mb-2 {
    margin-bottom: 2rem;
}

.u-mr-05 {
    margin-right: 0.5rem;
}

.u-ml-05 {
    margin-left: 0.5rem;
}

.u-w-full {
    width: 100%;
}

.u-w-100 {
    width: 100% !important;
}

.u-flex-1 {
    flex: 1;
}

.u-flex-2 {
    flex: 2;
}

.u-mono {
    font-family: var(--font-mono);
}

.u-text-muted {
    color: var(--text-muted);
}

.u-text-success {
    color: var(--success);
}

.u-text-danger {
    color: var(--error);
}

.u-text-accent {
    color: var(--accent);
}

.u-hidden {
    display: none !important;
}

.u-visible {
    visibility: visible;
}

.u-invisible {
    visibility: hidden;
}

/* --- Numeric Input Polish --- */
/* Hide clashing native spin buttons in Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    appearance: none;
    margin: 0;
}

/* Hide spin buttons in Firefox */
input[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}

/* Target Shoelace parts specifically */
sl-input::part(input)::-webkit-outer-spin-button,
sl-input::part(input)::-webkit-inner-spin-button {
    -webkit-appearance: none;
    appearance: none;
    margin: 0;
}



/* --- Nice Scrollbars --- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Target Shoelace scrollable areas */
::part(listbox) {
    max-height: 300px;
    scrollbar-width: thin;
}

::part(body),
sl-tab-panel {
    scrollbar-width: thin;
}

/* --- Layout --- */
.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
    position: relative;
    z-index: 200;
}

.panel-transparent {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease-out;
}

.app-container.single-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.doc-header-icon {
    font-size: 1.15rem;
}


.app-header {
    text-align: center;
    /* margin-bottom: 1.5rem; */
    /* padding-top: 1rem; */
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.app-title {
    font-size: 3rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, #2563eb, #38bdf8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 15px rgba(56, 189, 248, 0.4));
    position: relative;
}

.status-indicator {
    position: fixed;
    top: 1.25rem;
    right: 2rem;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    pointer-events: none;
    /* Let clicks pass through except on children */
}

.status-indicator>* {
    pointer-events: auto;
    /* Re-enable for tooltips/icons */
}

.app-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin: 0.5rem 0 0 0;
    font-weight: 500;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
}

.version-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;

    position: absolute;
    top: 0px;
    right: 0px;

    /* Reset Gradient Text Inheritance */
    -webkit-text-fill-color: initial;
    text-fill-color: initial;
    color: var(--text-muted);
}

.version-tag::part(base) {
    margin: 0;
}

.version {
    font-size: 0.5em;
    opacity: 0.6;
    vertical-align: super;
}

/* Background Banner */
.app-banner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: 0;
    opacity: 0.15;
    pointer-events: none;
    object-fit: cover;
    display: block !important;
    /* Force display */
}

/* --- Card & Section Styles --- */
sl-card {
    --border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    width: 100%;
}

[data-theme="dark"] sl-card {
    --border-color: var(--glass-border);
}

sl-card::part(base) {
    backdrop-filter: blur(20px);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] sl-card::part(base) {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.7) 0%, rgba(30, 41, 59, 0.4) 100%);
    border: 1px solid var(--glass-border);
}

sl-card::part(body) {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem;
}


.form-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.section-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 32px;
}

.controls-top {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.controls-top sl-select,
.expression-combobox-dropdown {
    flex: 1 1 200px;
}

.controls-top sl-select {
    flex: 1;
}

.expression-combobox-dropdown {
    flex: 1;
}

.combobox-trigger {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1rem;
    height: var(--sl-input-height-medium);
    border-radius: var(--sl-input-border-radius-medium);
    cursor: pointer;
    transition: var(--sl-transition-fast) border-color, var(--sl-transition-fast) box-shadow;
    user-select: none;
}

[data-theme="dark"] .combobox-trigger {
    background-color: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    color: #cbd5e1;
}


[data-theme="dark"] .combobox-trigger:hover {
    border-color: rgba(255, 255, 255, 0.2);
}


[data-theme="dark"] .combobox-trigger:active {
    background-color: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .combobox-trigger {
    background-color: rgba(255, 255, 255, 0.3) !important;
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid #ffffff35;
    transition: all 0.2s ease;
}

[data-theme="light"] .combobox-trigger:hover {
    background-color: rgba(255, 255, 255, 0.3) !important;
    border-color: var(--accent);
    color: #0f172a;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .combobox-trigger sl-icon {
    color: #475569;
    /* Slate 600 - Muted Icon */
    transition: color 0.2s;
}

[data-theme="light"] .combobox-trigger:hover sl-icon {
    color: #0f172a;
    /* Darken on hover */
}

.trigger-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.trigger-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 1rem;
    font-weight: 400;
}

.expression-combobox-dropdown::part(panel) {
    width: var(--panel-width, 300px);
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.98) 0%, rgba(15, 23, 42, 0.95) 100%);
    /* Gradient: Slate 800 -> Slate 900 */
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    padding: 0;
}

.btn-secondary.btn-docs::part(base) {
    height: 42px !important;
}

.combobox-panel {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.combobox-search {
    padding: 0.75rem;
    border-bottom: 1px solid var(--glass-border);
    background: transparent;
}

.combobox-menu {
    max-height: 400px;
    overflow-y: auto;
    padding: 0.25rem;
    background: transparent !important;
    border: none !important;
}

.combobox-menu::part(base) {
    background: transparent;
}

.snippet-item {
    border-radius: var(--sl-border-radius-medium);
    margin: 2px 0;
}

.snippet-item::part(base) {
    padding: 0.5rem 0.75rem;
    transition: background 0.2s ease, border-color 0.2s ease;
    border: 1px solid transparent;
}

.snippet-item:hover::part(base) {
    background-color: rgba(56, 189, 248, 0.08) !important;
    color: var(--text) !important;
}

.snippet-item.is-selected::part(base) {
    background: rgba(56, 189, 248, 0.15) !important;
    border-color: rgba(56, 189, 248, 0.3);
}

.snippet-item.is-selected:hover::part(base) {
    background: rgba(56, 189, 248, 0.2) !important;
}

/* Light Theme Combobox Refinement (White/Transparent Glass) */
[data-theme="light"] .expression-combobox-dropdown::part(panel) {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.3) 100%) !important;
    /* More White, Transparent */
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
    box-shadow:
        0 8px 32px 0 rgba(31, 38, 135, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2) !important;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

[data-theme="light"] .combobox-search {
    /* background-color: rgba(255, 255, 255, 0.5); */
    border-bottom: 0px solid rgba(226, 232, 240, 0);
    /* Slate 200 */
}

[data-theme="light"] .combobox-search sl-input::part(base) {
    background-color: rgba(248, 250, 252, 0.7);
    /* Slate 50 Transparent */
    border-color: rgba(226, 232, 240, 0.8);
    color: #334155;
    box-shadow: none !important;
}

[data-theme="light"] sl-menu-label {
    color: #64748b !important;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.75rem 1rem 0.25rem 1rem;
}

[data-theme="light"] .snippet-item::part(base) {
    border-radius: 6px;
    margin: 0 0.25rem;
    color: #334155;
    transition: all 0.15s ease;
    background-color: transparent;
    /* Ensure default is transparent */
}

[data-theme="light"] .snippet-item:hover::part(base),
[data-theme="light"] .snippet-item:focus-visible::part(base) {
    background-color: #dddedf99 !important;
    /* Slate 100 transparent */
    color: #0f172a !important;
}

/* Ensure lingering mouse focus doesn't look selected */
[data-theme="light"] .snippet-item:focus:not(:focus-visible):not(:hover)::part(base) {
    background-color: transparent !important;
    color: #334155 !important;
}

[data-theme="light"] .snippet-item.is-selected::part(base) {
    background-color: #dddedf99 !important;
    color: #0f172a !important;
    border: 1px solid rgb(203 203 203 / 60%);
}

[data-theme="light"] .snippet-preview {
    background: transparent !important;
    /* Slate 50 */
    border: 1px solid transparent !important;
    /* Slate 200 */
    color: #64748b !important;
    /* Slate 500 */
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    margin-top: 0.25rem;
}

/* Scrollbar refinement for light theme dropdown */
[data-theme="light"] .combobox-menu::-webkit-scrollbar-thumb {
    background-color: rgba(203, 213, 225, 0.6);
    /* Slate 300 Transparent */
    border-radius: 4px;
}

[data-theme="light"] .combobox-menu::-webkit-scrollbar-track {
    background-color: transparent;
}

/* Global Shoelace Override to kill that stubborn Cyan highlight */
sl-menu-item::part(base) {
    --sl-color-primary-600: var(--accent);
}

sl-menu-item:focus-visible::part(base) {
    background-color: rgba(56, 189, 248, 0.1) !important;
    color: var(--text) !important;
}

sl-menu-item::part(base):hover {
    background-color: rgba(56, 189, 248, 0.1) !important;
    color: var(--text) !important;
}

.snippet-icon {
    font-size: 1.25rem;
    opacity: 0.8;
}

.snippet-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.snippet-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.snippet-preview {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    opacity: 0.6;
}

.snippet-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.snippet-item:hover .snippet-actions {
    opacity: 1;
}

.action-btn {
    font-size: 0.9rem;
}

.action-btn.pinned {
    color: var(--accent);
}

.action-btn.danger:hover {
    color: var(--error);
}

.ml-auto {
    margin-left: auto;
}

.opacity-50 {
    opacity: 0.5;
}

.btn-calculate {
    width: 100%;
}

.btn-calculate::part(base) {
    height: 2.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    background: linear-gradient(135deg, #1d4ed8 0%, #0891b2 100%);
    border: none;
    color: var(--text);
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 0.2s ease, background 0.2s ease;
}

.btn-calculate::part(base):hover {
    background: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

.form-actions {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.btn-calculate::part(base):active {
    opacity: 0.9;
}

.empty-state-small {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-style: italic;
    opacity: 0.7;
}

/* Remove Grid */
.main-grid {
    display: block;
}

.u-cursor-default {
    cursor: default !important;
}

/* Inputs */
/* Clean consistent background for all inputs */
sl-input::part(base) {
    transition: var(--sl-transition-fast) border-color, var(--sl-transition-fast) box-shadow;
}

[data-theme="dark"] sl-input::part(base) {
    background-color: rgba(0, 0, 0, 0.3) !important;
    background-image: none !important;
    border-color: var(--glass-border);
    color: var(--text);
}

sl-input::part(prefix),
sl-input::part(input),
sl-input::part(suffix),
sl-input::part(clear-button) {
    background: transparent !important;
}

sl-input::part(base):hover {
    border-color: rgba(255, 255, 255, 0.2);
}

sl-input::part(base):focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

sl-input::part(input) {
    color: #cbd5e1;
    /* Subtle Slate 300 */
    font-size: 1.1rem;
}

sl-input::part(clear-button),
sl-select::part(clear-button) {
    color: var(--text-muted);
    opacity: 0.4;
    transition: opacity var(--sl-transition-fast);
}

sl-input::part(clear-button):hover,
sl-select::part(clear-button):hover {
    opacity: 0.8;
}

sl-input::part(help-text) {
    color: var(--text-muted);
    font-size: 0.85rem;
    opacity: 0.7;
    margin-top: 0.4rem;
}

sl-input[disabled]::part(help-text) {
    opacity: 0.5;
}

sl-select::part(display-label) {
    color: #cbd5e1;
}

/* Select */
[data-theme="dark"] sl-select::part(combobox) {
    background-color: rgba(0, 0, 0, 0.3);
    border-color: var(--glass-border);
    color: #cbd5e1;
    /* Subtle Slate 300 */
}

[data-theme="dark"] sl-select::part(listbox) {
    background-color: #1e293b;
    border: 1px solid var(--glass-border);
}

sl-option::part(base) {
    display: flex;
    align-items: center;
}

[data-theme="dark"] sl-option::part(base) {
    background-color: #1e293b;
    color: #cbd5e1;
}

[data-theme="dark"] sl-option::part(base):hover {
    background-color: var(--primary);
}

/* Buttons */
sl-button::part(base) {
    font-weight: 600;
}

sl-icon-button {
    color: var(--text-muted);
}

sl-icon-button::part(base):hover {
    color: var(--accent);
}

.danger-icon::part(base):hover,
.danger-icon::part(base):focus-visible {
    color: var(--error);
    --sl-color-primary-600: var(--error);
    --sl-focus-ring-width: 1px;
    --sl-focus-ring-color: rgba(239, 68, 68, 0.4);
}

.btn-clear-all::part(base):hover,
.btn-clear-all::part(base):focus-visible {
    color: var(--error) !important;
    border-color: var(--error) !important;
    background-color: rgba(239, 68, 68, 0.1) !important;
    --sl-focus-ring-width: 1px !important;
    --sl-focus-ring-color: rgba(239, 68, 68, 0.4) !important;
}

sl-button[variant="danger"]::part(base):focus-visible {
    --sl-focus-ring-width: 1px !important;
    --sl-focus-ring-color: rgba(239, 68, 68, 0.4) !important;
}

.btn-secondary::part(base) {
    transition: all 0.2s ease;
}

[data-theme="dark"] .btn-secondary::part(base) {
    background-color: rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
}


[data-theme="dark"] .btn-secondary::part(base):hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text);
}

.btn-clear-all sl-icon {
    color: inherit;
}

/* --- Specific Components --- */
.input-group {
    margin-bottom: 1rem;
}

.controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.controls sl-select {
    flex: 1;
}

.controls sl-button {
    flex: 0 0 auto;
}

/* Result Box */
.result-box {
    padding: 1.25rem;
    border-radius: var(--sl-border-radius-medium);
    background: rgba(15, 23, 42, 0.3);
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.75rem;
    min-height: 80px;
}

[data-theme="dark"] .result-box {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
}

.result-box.error {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.05);
}

.result-box.error .result-value {
    color: var(--error) !important;
    text-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-body {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex: 1;
    min-height: 51px;
}

.result-value {
    font-family: var(--font-mono);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--success);
    cursor: pointer;
    transition: filter 0.2s ease;
    text-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
    word-break: break-all;
    line-height: normal;
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 0;
}

.result-value:hover {
    filter: brightness(1.1);
}

.result-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-right: 0.5rem;
    flex-shrink: 0;
}

.copy-btn {
    font-size: 1.25rem !important;
}

.copy-btn::part(base) {
    color: var(--text-muted);
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--sl-transition-fast) color, var(--sl-transition-fast) background-color;
    border-radius: var(--sl-border-radius-medium);
    transform: translateY(2px);
}

.copy-btn::part(base):hover {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}


.result-footer {
    display: flex;
    justify-content: space-between;
    min-height: 30px;
    align-items: anchor-center;
}

.result-msg-area {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
}

.result-msg {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.result-stats {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.shy-badge::part(base) {
    background: rgba(255, 255, 255, 0.03) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    color: #cbd5e1 !important;
    font-weight: 500;
    backdrop-filter: blur(4px);
}


/* Variables */
.var-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.var-row sl-input {
    flex: 1;
    --sl-input-font-size-small: 0.85rem;
}

.var-row sl-input::part(input) {
    font-size: 0.85rem;
}

[data-theme="light"] .var-row sl-input::part(input) {
    color: #0f172a !important;
    /* Slate 900 - Dark for visibility */
    -webkit-text-fill-color: #0f172a !important;
}

.var-row .eq {
    color: var(--text-muted);
    font-weight: bold;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: 1rem;
}

/* History */

.history-card {
    margin-top: 2rem;
    position: relative;
    z-index: 5;
}

.history-card::part(base) {
    backdrop-filter: blur(20px);
    border-radius: 16px;
}

[data-theme="dark"] .history-card::part(base) {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
}

.history-item {
    border-radius: var(--sl-border-radius-medium);
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

[data-theme="dark"] .history-item {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
}


[data-theme="dark"] .history-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
}

.history-item-main {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 4px;
}

.hist-expr {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-all;
    flex: 1;
    min-width: 0;
}

.hist-res-group {
    display: flex;
    gap: 0.5rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.hist-eq {
    color: var(--accent);
    font-weight: bold;
}

.hist-res {
    color: var(--success);
    font-weight: bold;
}

.history-item-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.hist-vars {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hist-type-badge {
    opacity: 0.7;
    zoom: 0.8;
}

/* Docs Modal */
.doc-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.75rem;
    border-radius: var(--sl-border-radius-medium);
    margin-bottom: 0.5rem;
}

.shortcuts-container {
    padding: 1.5rem 2rem;
    display: flex;
    flex-direction: column;
}

.shortcut-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.shortcut-row:last-child {
    border-bottom: none;
}

.shortcut-label {
    color: color-mix(in srgb, var(--text), transparent 30%);
    font-size: 1rem;
}

.shortcut-badges {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.shortcut-plus {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Light Theme Shortcut Visibility */
[data-theme="light"] .shortcut-row {
    border-bottom-color: #8f8f8f54;
    /* Slate 200 */
}

[data-theme="light"] .shortcut-label {
    color: #334155;
    /* Slate 700 */
}

[data-theme="light"] .shortcut-plus {
    color: #64748b;
    /* Slate 500 */
}


.kbd-badge {
    border-radius: 4px !important;
    padding: 0.2rem 0.6rem !important;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.45) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    color: #cbd5e1 !important;
    opacity: 0.85;
    font-family: var(--font-mono);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .kbd-badge {
    background-color: rgba(241, 245, 249, 0.4) !important;
    border: 1px solid #cbd5e1 !important;
    color: #475569 !important;
    box-shadow: none !important;
}


.doc-item strong {
    color: var(--accent);
    font-family: monospace;
}

.doc-item .args {
    color: var(--text-muted);
    font-size: 0.9em;
}


/* Dialog */
sl-dialog::part(overlay) {
    background-color: rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(2px);
    transition: background-color 0.3s ease;
}


sl-dialog::part(panel) {
    backdrop-filter: blur(25px);
    border-radius: 16px;
    overflow: hidden;
    width: 95%;
    height: 95%;
    max-width: 1600px;
    max-height: 1200px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] sl-dialog::part(panel) {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.25) 0%, rgba(30, 41, 59, 0.15) 100%);
    border: 1px solid var(--glass-border);
}


sl-dialog::part(header) {
    padding: 0rem;
    background: transparent;
}

sl-dialog::part(title) {
    font-weight: 700;
}

[data-theme="dark"] sl-dialog::part(title) {
    color: color-mix(in srgb, var(--text), transparent 20%);
}

sl-dialog::part(body) {
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex: 1;
}


sl-dialog::part(footer) {
    display: none;
}

sl-tab {
    height: 2rem;
    cursor: pointer;
}

sl-tab-group {
    --indicator-color: var(--accent);
    --track-color: transparent;
    /* Remove track border color */
    --sl-spacing-medium: 0;
    /* Forced Shoelace zero-padding */
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    gap: 0 !important;
    outline: none !important;
}

sl-tab-group::part(nav) {
    background: transparent;
    border-bottom: 0 !important;
    /* Removed horizontal line as per user request */
    box-shadow: none !important;
    /* Ensure no shadow creates a line */
    z-index: 20;
    margin-bottom: 0 !important;
}

sl-tab-group::part(base),
sl-tab-group::part(body) {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 0 !important;
    margin: 0 !important;
    outline: none !important;
}

sl-tab::part(base) {
    color: color-mix(in srgb, var(--text), transparent 20%);
}


sl-tab:focus,
sl-tab:focus-visible {
    outline: none !important;
    box-shadow: none !important;
}

sl-tab:focus::part(base),
sl-tab:focus-visible::part(base) {
    outline: none !important;
    box-shadow: none !important;
    transition: all 0.2s ease;
    color: var(--accent) !important;
}

sl-tab:hover::part(base) {
    color: var(--accent) !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scaleX(0.5);
    }

    to {
        opacity: 1;
        transform: scaleX(1);
    }
}

sl-tab[active]::part(base) {
    color: var(--accent) !important;
}

sl-tab-panel {
    padding: 0 !important;
    margin: 0 !important;
    height: 100%;
    overflow-y: auto;
}

[data-theme="dark"] sl-tab-panel {
    background: #1e293b;
}

.docs-header {
    display: flex;
    gap: 1rem;
    padding: 0.5rem 1rem;
    position: sticky;
    top: 0;
    z-index: 15;
}

[data-theme="dark"] .docs-header {
    /* background: #1c253580; */
    background: linear-gradient(145deg, #1c253580 0%, rgb(15 23 42 / 50%) 100%);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-border);
}

.docs-header.is-static {
    position: relative;
    z-index: 5;
}

.docs-list {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.docs-empty {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
}

.about-container {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    line-height: 1.6;
}

[data-theme="dark"] .about-container {
    color: color-mix(in srgb, var(--text), transparent 30%);
}

.about-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    text-align: justify;
}

.about-section strong {
    margin-right: 0.5rem;
    font-size: 1rem;
    font-weight: 700;
    display: inline-block;
}

[data-theme="dark"] .about-section strong {
    color: #cbd5e1;
    /* Brighter label color */
}

.about-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

[data-theme="dark"] .about-icon {
    color: #94a3b8;
}

.about-link,
.about-link:visited {
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

[data-theme="dark"] .about-link,
[data-theme="dark"] .about-link:visited {
    color: var(--accent);
}

.about-link:hover,
.about-link:visited:hover {
    opacity: 0.8;
}

[data-theme="dark"] .about-link:hover,
[data-theme="dark"] .about-link:visited:hover {
    color: #2563eb;
}

.about-alert {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--sl-border-radius-medium);
    padding: 1rem;
    color: color-mix(in srgb, var(--text), transparent 30%);
    font-size: 0.9rem;
    line-height: 1.5;
    text-align: justify;
    /* Justify text */
}

[data-theme="dark"] .about-alert {
    background: rgba(245, 158, 11, 0.05);
    border: 1px solid rgba(245, 158, 11, 0.15);
}

.about-alert strong {
    font-size: 1rem;
    font-weight: 700;
}

[data-theme="dark"] .about-alert strong {
    color: #d97706;
    /* darker industrial amber */
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

[data-theme="dark"] .alert-icon {
    color: #d97706;
}

.settings-alerts {
    padding: 2rem;
    padding-top: 0rem;
}

.settings-danger-alert {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--sl-border-radius-medium);
    padding: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
    text-align: justify;
    margin-top: 1.5rem;
}

[data-theme="dark"] .settings-danger-alert {
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.15);
}

.settings-danger-alert strong {
    font-size: 1rem;
    font-weight: 700;
    color: var(--danger);
    display: block;
    margin-bottom: 0.25rem;
}

.settings-danger-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    color: var(--danger);
    margin-top: 0.1rem;
}

.settings-danger-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.doc-card {
    border-radius: var(--sl-border-radius-medium);
    padding: 0.75rem 1rem;
    transition: background 0.2s ease, border-color 0.2s ease;
}

[data-theme="dark"] .doc-card {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
}

.doc-card:hover {
    /* Layout/Interaction only if generic */
}

[data-theme="dark"] .doc-card:hover {
    background: rgba(0, 0, 0, 0.4);
    border-color: rgba(59, 130, 246, 0.5);
}

.doc-card-header {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    margin-bottom: 0.25rem;
}

/* Tighter spacing */

/* Tighter spacing */


.function-cat-select::part(listbox) {
    max-height: 500px;
    /* Increase height to avoid scrollbar as requested */
}

.doc-name {
    color: var(--accent);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.25rem;
    cursor: pointer;
    transition: color 0.2s ease;
}

.doc-name:hover {
    color: #2563eb;
    text-decoration: underline dotted;
}

.doc-args {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.doc-category {
    margin-left: auto;
}

.cat-icon {
    font-size: 1.1em;
    margin-right: 0.45rem;
}

.cat-icon-sm {
    font-size: 1.25rem;
    width: 1.25rem;
    height: 1.25rem;
    display: flex;
}

.cat-icon-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    margin-right: 0.5rem;
    vertical-align: middle;
    flex-shrink: 0;
}



.tab-icon {
    font-size: 1.1rem;
    width: 1.1rem;
    height: 1.1rem;
    margin-right: 0.5rem;
    vertical-align: middle;
    transition: color 0.2s ease;
}

.setting-icon {
    font-size: 1.1rem;
    width: 1.1rem;
    height: 1.1rem;
    margin-right: 0.5rem;
    opacity: 0.9;
}

.ex-group-icon {
    font-size: 1em;
    margin-right: 0.5rem;
    opacity: 0.7;
}

.section-icon {
    font-size: 0.95em;
    margin-right: 0.45rem;
}

.type-icon {
    font-size: 1.25rem;
    margin-right: 0.45rem;
}

.type-icon-sm {
    font-size: 1em;
    margin-right: 0.25rem;
}

.stats-badge::part(base),
.result-type-badge-sm::part(base) {
    border-radius: 4px !important;
    padding: 0.15rem 0.45rem !important;
    font-size: 0.72rem;
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.45) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    color: #cbd5e1 !important;
    opacity: 0.85;
}

.stats-icon {
    font-size: 1.25rem;
    margin-right: 0.5rem;
    opacity: 0.8;
}

.doc-category::part(base),
.op-category::part(base),
.result-type-badge::part(base),
.shy-badge::part(base) {
    border-radius: 6px !important;
    padding: 0.3rem 0.65rem !important;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.2) !important;
    border: 1px solid var(--glass-border) !important;
    color: var(--text-muted) !important;
}

.doc-desc {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.doc-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.btn-example::part(base) {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--accent);
    transition: all 0.2s ease;
}

.btn-example:hover::part(base) {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text);
}

/* Operators Table */
.ops-table-container {
    padding: 0;
}

.ops-table {
    width: 100%;
    border-collapse: separate;
    /* Required for sticky borders */
    border-spacing: 0;
    font-size: 0.95rem;
}

.ops-table th {
    text-align: left;
    padding: 1.26rem 1rem;
    color: #cbd5e1;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--glass-border);
    /* background: rgba(30, 41, 59, 0.9); */
    /* background: #161f2fab; */
    /* Higher opacity for readability */
    backdrop-filter: blur(24px);
    /* Strong blur to hide scrolling text */
    -webkit-backdrop-filter: blur(24px);
    position: sticky;
    top: 0;
    z-index: 10;
    /* Higher z-index to stay above rows */
    white-space: nowrap;
    background-clip: padding-box;
    /* Fix for sticky borders */
}

.sortable-header {
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
}

.th-content {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.sortable-header:hover {
    background-color: #2d3748 !important;
    /* Solid lighter slate for hover */
    color: var(--text);
}

.sortable-header.active {
    color: var(--text);
    border-bottom: 1px solid var(--accent) !important;
    /* Force the blue line to stay sticky */
}

.ops-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--glass-border);
    color: #cbd5e1;
}

.ops-table th:first-child,
.ops-table td:first-child {
    text-align: center;
}

.ops-table th:first-child .th-content {
    justify-content: center;
}

.ops-table tr:hover {
    background: rgba(255, 255, 255, 0.04);
}

.op-symbol {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
    font-family: var(--font-mono);
    white-space: pre-wrap;
    word-wrap: break-word;
    display: inline-block;
    max-width: 100%;
    cursor: pointer;
    transition: color 0.2s ease, filter 0.2s ease;
}

.op-symbol:hover {
    color: #2563eb;
    filter: brightness(1.25);
}

.ops-table td.num {
    font-family: var(--font-mono);
    font-weight: 600;
}

/* Settings Form */
/* Settings Tab Specific (Shadow DOM Bridge) */
sl-tab-panel[name="settings"]::part(base),
sl-tab-panel[name="about"]::part(base) {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.settings-flex-wrapper,
.about-flex-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
    height: 100%;
    width: 100%;
    overflow: hidden;
}

.settings-content-area,
.about-content-area {
    flex: 1;
    overflow-y: auto;
    width: 100%;
    min-height: 0;
}

.settings-button-footer {
    flex-shrink: 0;
    padding: 1.25rem 1rem;
    background: transparent;
    /* border-top: 2px solid var(--glass-border); */
    display: flex;
    gap: 1rem;
}

.settings-button-footer sl-button {
    flex: 1;
}

.btn-cancel::part(base) {
    border-color: var(--glass-border);
    color: var(--text-muted);
    font-weight: 600;
}

.btn-cancel:not([disabled])::part(base):hover {
    background-color: rgba(255, 255, 255, 0.08) !important;
    border-color: #64748b !important;
    color: #f8fafc !important;
    box-shadow: none !important;
    transform: none !important;
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding: 2rem;
    box-sizing: border-box;
    max-width: 100%;
    padding-bottom: 0rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.form-group sl-input {
    width: 100%;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: color-mix(in srgb, var(--text), transparent 30%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: default;
}


.settings-presets {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
    width: 100%;
}

.settings-presets sl-button {
    width: 100%;
}

.settings-presets sl-button::part(base) {
    width: 100%;
    font-size: 0.75rem;
    padding: 0 0.4rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: all 0.2s ease;
    border-radius: 6px !important;
}

.settings-presets sl-button[variant="primary"]:not([outline])::part(base) {
    border: 1px solid var(--accent);
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--accent);
    transition: all 0.2s ease;
}

.settings-presets sl-button[variant="primary"][outline]::part(base) {
    border-color: var(--glass-border);
    color: var(--text-muted);
    background: transparent;
}

.settings-presets sl-button[variant="primary"][outline]:hover::part(base) {
    /* border-color: #38bdf8; */
    /* color: #f8fafc; */
    /* background: rgba(56, 189, 248, 0.15); */
    /* box-shadow: 0 0 10px rgba(56, 189, 248, 0.2); */
    transform: translateY(0);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border-color: rgba(255, 255, 255, 0.2);
}

.settings-presets sl-button[variant="primary"][outline]:active::part(base) {
    transform: translateY(0);
    /* background: rgba(56, 189, 248, 0.2); */
}

.btn-stepper {
    margin: 0 !important;
}

.btn-stepper::part(base) {
    color: var(--accent);
    padding: 0 !important;
    margin: 0 !important;
    height: 100% !important;
    min-height: 2.25rem !important;
    border-radius: 4px !important;
    /* Industrial safety margin to avoid border overlap */
    border: none !important;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-stepper::part(label) {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 0 !important;
    height: 100% !important;
    width: 2.25rem !important;
}

.btn-stepper sl-icon {
    font-size: 1.1rem;
}

.btn-stepper:hover::part(base) {
    background-color: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
}

.btn-stepper:active::part(base) {
    background-color: rgba(56, 189, 248, 0.25);
}

.btn-stepper[disabled]::part(base) {
    color: var(--text-muted);
    opacity: 0.3;
    transform: none;
}

/* Internal Spacing refinement for all inputs */
sl-input::part(prefix) {
    margin-left: 0.35rem;
}

sl-input::part(suffix) {
    margin-right: 0.35rem;
}

/* Specific override for stepper containers to eliminate gaps */
sl-input:has(.btn-stepper)::part(base) {
    overflow: hidden !important;
    padding: 0 !important;
}

sl-input:has(.btn-stepper)::part(input) {
    padding: 0 0.75rem !important;
}

sl-input:has(.btn-stepper)::part(prefix),
sl-input:has(.btn-stepper)::part(suffix) {
    margin: 0 !important;
    padding: 0 !important;
    height: 100% !important;
    display: flex !important;
    align-items: stretch !important;
}

.btn-save-settings {
    width: 100%;
}

.btn-save-settings::part(base) {
    font-size: 1.1rem;
    font-weight: 600;
    background: linear-gradient(135deg, #1d4ed8 0%, #0891b2 100%);
    border: none;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 0.2s ease, background 0.2s ease;
}

.btn-save-settings::part(base):hover {
    background: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

.btn-save-settings::part(base):active {
    opacity: 0.9;
}



/* Floating Toggle Buttons (Docs & History) */
.doc-toggle,
.history-toggle {
    position: fixed;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: var(--glass-surface);
    color: var(--text);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.25rem;
    cursor: pointer;
    z-index: 50;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.doc-toggle:hover,
.history-toggle:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.doc-toggle:active,
.history-toggle:active {
    transform: translateY(0);
}

/* Light Theme Overrides for Toggles */
[data-theme="light"] .doc-toggle,
[data-theme="light"] .history-toggle {
    background: rgba(255, 255, 255, 0.8);
    border-color: #cbd5e1;
    color: #475569;
}

[data-theme="light"] .doc-toggle:hover,
[data-theme="light"] .history-toggle:hover {
    background: var(--text);
    border-color: var(--accent);
    color: var(--accent);
}

.scroll-top-btn {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    z-index: 20;
    width: 3.2rem;
    height: 3.2rem;
    background: transparent;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform: translateY(10px) scale(0.9);
}

.scroll-top-btn:hover {
    transform: translateY(-5px) scale(1.1);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.scroll-top-btn::part(base) {
    border: 1px solid var(--accent);
    background: rgba(59, 130, 246, 0.3);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--accent);
    transition: all 0.2s ease;
    max-width: 40px;
    max-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.scroll-top-btn sl-icon {
    font-size: 1.8rem;
    stroke-width: 3;
    /* Optical correction: shift slightly down/right if needed, but flex should handle it */
    transform: translateY(5px);
}

.scroll-top-btn::part(base):hover {
    background: #0ea5e99c;
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.4);
}

/* Misc */
/* Logo Wrapper (The Anchor) - Stable hitbox */
.corner-logo-wrapper {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    z-index: 100;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    justify-content: center;
}

.corner-logo-wrapper:hover {
    transform: scale(1.1);
}

/* The Image itself */
.corner-logo {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--glass-border);
    opacity: 0.8;
    transition: all 0.3s ease;
    object-fit: cover;
    /* Ensure image fills circle */
}

.corner-logo-wrapper:hover .corner-logo {
    opacity: 1;
    border-color: var(--accent);
    transform: rotate(10deg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.contact-footer {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 100;
}

.contact-link,
.contact-link:visited {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    /* Standardized muted color */
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1), transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    /* Explicit transitions to avoid flickering background-clip */
    opacity: 0.7;
    /* Standardized non-hover opacity */
}

.contact-link sl-icon {
    font-size: 1.25rem;
    width: 1.25rem;
    height: 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    opacity: 0.8;
    transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-link:hover {
    opacity: 1 !important;
    filter: none !important;
    /* Restore Gradient Text like UoM */
    background: linear-gradient(135deg, #2563eb 0%, #38bdf8 100%) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    color: transparent !important;
    -webkit-text-fill-color: transparent !important;
    transform: translateX(4px);
}

.contact-link:hover sl-icon {
    opacity: 1;
    color: #38bdf8;
    transform: scale(1.1);
    /* filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.4)); */
    /* Add glow instead of gradient */
}

.vibe-card {
    align-items: center;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.vibe-text {
    margin: 0;
    white-space: pre;
    background: linear-gradient(to right, #2563eb, #38bdf8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 1rem;
    width: fit-content;
}

.vibe-description {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: linear-gradient(to right, #2563eb, #38bdf8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    opacity: 0.9;
    line-height: 1.4;
    text-align: center;
}

/* Inline links in the About Description (License, Fork, NuGet) */
.vibe-description a {
    color: #2563eb;
    /* Dark Blue from Logo Gradient */
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    border-bottom: 1px dotted rgba(37, 99, 235, 0.4);
}

.vibe-description a:hover {
    color: #38bdf8;
    /* Cyan from Logo Gradient */
    border-bottom-color: #38bdf8;
    background: none;
    /* Remove text gradient on hover */
    -webkit-text-fill-color: initial;
}

.about-footer {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.25rem 1rem;
    background: transparent;
    /* border-top: 2px solid var(--glass-border); */

    .about-footer-links {
        flex-shrink: 0;
        display: flex;
        flex-wrap: wrap;
        min-height: 40px;
        gap: 1rem;
        align-items: center;
    }
}

/* --- About Footer (Brand Buttons) --- */
.about-footer sl-button::part(base) {
    font-weight: 500;
    transition: all 0.2s ease;
    border-color: var(--glass-border);
    color: var(--text-muted);
}

/* Light Theme: Soften Brand Icons (Less Contrast) */
[data-theme="light"] .about-footer sl-button sl-icon {
    filter: grayscale(1) opacity(0.6);
    transition: all 0.2s ease;
}

[data-theme="light"] .about-footer sl-button:hover sl-icon {
    filter: grayscale(0) opacity(1);
}

.about-footer sl-button::part(base):hover {
    /* box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2); */
}

/* Brand Specific Hovers */
.brand-github:hover::part(base) {
    border-color: #f0f6fc !important;
    color: #f0f6fc !important;
    background: rgba(240, 246, 252, 0.1) !important;
}

.brand-nuget:hover::part(base) {
    border-color: #004880 !important;
    color: #3399ff !important;
    /* Lighter blue for dark mode */
    background: rgba(0, 72, 128, 0.3) !important;
}

.brand-license:hover::part(base) {
    border-color: #f3ba01 !important;
    color: #f3ba01 !important;
    background: rgba(245, 158, 11, 0.3) !important;
}

.brand-vibe:hover::part(base) {
    border-color: #c4186e !important;
    color: #c4186e !important;
    /* Pink/Cyan vibe */
    background: rgba(236, 72, 153, 0.1) !important;
    /* box-shadow: 0 0 15px rgba(236, 72, 153, 0.3) !important; */
}

.brand-x:hover::part(base) {
    border-color: var(--text) !important;
    color: var(--text) !important;
    background: rgba(255, 255, 255, 0.1) !important;
}

.brand-email:hover::part(base) {
    border-color: #e72e1d !important;
    color: #e72e1d !important;
    background: rgba(234, 67, 53, 0.3) !important;
}

/* --- Light Theme Brand Hovers (Darker Text/Border) --- */
[data-theme="light"] .brand-github:hover::part(base) {
    background: rgba(30, 41, 59, 0.05) !important;
    /* Slate 800 tint */
    border-color: #1e293b !important;
    color: #1e293b !important;
}

[data-theme="light"] .brand-nuget:hover::part(base) {
    background: rgba(0, 72, 128, 0.05) !important;
    border-color: #004880 !important;
    color: #004880 !important;
}

[data-theme="light"] .brand-license:hover::part(base) {
    background: rgba(245, 158, 11, 0.1) !important;
    border-color: #d97706 !important;
    /* Amber 600 */
    color: #d97706 !important;
}

[data-theme="light"] .brand-vibe:hover::part(base) {
    background: rgba(236, 72, 153, 0.05) !important;
    border-color: #db2777 !important;
    /* Pink 600 */
    color: #db2777 !important;
    box-shadow: 0 4px 12px rgba(236, 72, 153, 0.2) !important;
}

[data-theme="light"] .brand-x:hover::part(base) {
    background: rgba(0, 0, 0, 0.05) !important;
    border-color: #000000 !important;
    color: #000000 !important;
}

[data-theme="light"] .brand-email:hover::part(base) {
    background: rgba(234, 67, 53, 0.05) !important;
    border-color: #dc2626 !important;
    /* Red 600 */
    color: #dc2626 !important;
}

/* Remove old status animation if not used elsewhere */
.pwa-status,
.engine-status {
    color: var(--success);
    font-size: 1.5rem;
    filter: drop-shadow(0 0 6px rgba(16, 185, 129, 0.4));
    vertical-align: middle;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: status-breath 3.5s ease-in-out infinite;
    cursor: help;
}

.pwa-status:hover,
.engine-status:hover {
    transform: scale(1.15);
    filter: drop-shadow(0 0 12px rgba(16, 185, 129, 0.8));
    animation-play-state: paused;
}

@keyframes status-breath {
    0% {
        filter: drop-shadow(0 0 4px rgba(16, 185, 129, 0.2));
        opacity: 0.8;
    }

    50% {
        filter: drop-shadow(0 0 10px rgba(16, 185, 129, 0.7));
        opacity: 1;
    }

    100% {
        filter: drop-shadow(0 0 4px rgba(16, 185, 129, 0.2));
        opacity: 0.8;
    }
}

/* --- Tooltip Theme (Industrial Dark) --- */

sl-tooltip::part(body) {
    padding: 0.65rem 0.85rem;
    font-size: 0.85rem;
    font-weight: 500;
    line-height: 1.5;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    max-width: 320px;
}

[data-theme="dark"] sl-tooltip::part(body) {
    background-color: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--glass-border);
    border-radius: var(--sl-border-radius-medium);
    color: #f1f5f9;
}

/* Ensure tooltips are readable in dark theme */
[data-theme="dark"] sl-tooltip::part(base) {
    --sl-tooltip-arrow-size: 6px;
    --sl-tooltip-background-color: rgba(15, 23, 42, 0.95);
}

.engine-status.is-loading {
    color: var(--text-muted);
    filter: none;
    opacity: 0.5;
    animation: spin 2s linear infinite;
}

.shy-badge sl-icon {
    font-size: 1.1rem;
    vertical-align: middle;
}

/* --- Tabs & Navigation --- */
sl-tab[active] .tab-icon {
    color: var(--accent);
}

sl-tab:hover .tab-icon {
    color: var(--accent);
}

/* --- UX & Micro-Interactions --- */

/* Smooth Tab Transitions */
sl-tab-panel::part(base) {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

sl-tab-panel[active]::part(base) {
    opacity: 1;
    transform: translateY(0);
    outline: none !important;
}

/* Result Ping Animation */
@keyframes result-ping {
    0% {
        transform: scale(1);
        filter: brightness(1);
    }

    50% {
        transform: scale(1.02);
        filter: brightness(1.3) drop-shadow(0 0 8px var(--accent));
    }

    100% {
        transform: scale(1);
        filter: brightness(1);
    }
}

.result-animate {
    animation: result-ping 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* --- Syntax Highlighting --- */
.syntax-editor {
    position: relative;
    width: 100%;
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.5;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--sl-border-radius-medium);
    overflow: hidden;
    min-height: 100px;
    transition: border-color 0.2s ease;
    display: flex;
    flex-direction: column;
}

.syntax-editor:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.syntax-editor textarea {
    position: relative;
    z-index: 2;
    width: 100%;
    min-height: 100px;
    padding: 1rem;
    background: transparent;
    border: none;
    resize: none;
    color: transparent;
    caret-color: var(--accent);
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    outline: none;
    display: block;
    box-sizing: border-box;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-gutter: stable;
    font-variant-ligatures: none;
    text-rendering: optimizeSpeed;
}

.syntax-editor .highlight-overlay {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    padding: 1rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
    overflow: hidden;
    pointer-events: none;
    color: var(--text-muted);
    box-sizing: border-box;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    margin: 0;
    scrollbar-gutter: stable;
    font-variant-ligatures: none;
    text-rendering: optimizeSpeed;
}

.hl-op {
    color: #38bdf8;
}

.hl-num {
    color: var(--text);
}

.hl-func {
    color: #94a3b8;
}

.hl-bool {
    color: #fb7185;
}

.hl-var {
    color: #60a5fa;
}

.hl-str {
    color: #fbbf24;
}

.hl-unknown {
    color: #fb7185;
    text-decoration: underline wavy;
}

.suggestion-pill::part(base) {
    --sl-button-font-size-small: 0.75rem;
    padding: 0 0.5rem;
    height: 1.8rem;
    border-style: dashed;
}

/* Snippet Library */
.btn-save-snippet {
    font-size: 1.25rem;
    color: var(--sl-color-primary-400);
    transition: color 0.2s ease;
}

.btn-save-snippet::part(base) {
    height: 30px;
    min-height: 30px;
    padding: 0 0.75rem;
}

.btn-save-snippet:hover {
    color: var(--sl-color-primary-300);
}


/* Save Dialog & Premium Polish */
/* Adaptive scaling for specific dialogs if needed, though sl-dialog generic now handles most of it */

.save-dialog::part(panel) {
    width: 65%;
    height: 75%;
    max-width: 800px;
    max-height: 970px;
}

.save-dialog::part(header) {
    /* border-bottom: 1px solid var(--glass-border); */
    background: transparent;
    padding: 0.3rem 1rem;
}

.save-dialog::part(body) {
    padding: 0rem 1.25rem;
    overflow-y: auto;
}

/* Confirm Dialog */
.confirm-dialog::part(panel) {
    max-width: 450px;
    height: auto !important;
    max-height: none !important;
}

.confirm-dialog::part(header) {
    border-bottom: none;
    background: transparent;
    padding: 1.5rem 1.5rem 0;
}

.confirm-dialog::part(title) {
    font-size: 0.9rem;
    font-weight: 800;
    color: #fca5a5;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0;
}

.confirm-dialog::part(close-button) {
    display: none;
}

.confirm-dialog::part(body) {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    color: #cbd5e1;
    line-height: 1.5;
}

.confirm-dialog::part(footer) {
    border-top: none;
    background: transparent;
    padding: 0 1.5rem 1.5rem;
    display: flex;
    justify-content: flex-end;
}

.confirm-dialog sl-button[slot="footer"]+sl-button[slot="footer"] {
    margin-left: 0.75rem;
}

.confirm-dialog sl-button[variant="danger"]::part(base) {
    background: var(--error);
    border: none;
    color: var(--text);
}

.confirm-dialog sl-button[variant="danger"]::part(base):hover {
    background: #dc2626;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

.confirm-dialog sl-button[variant="danger"]::part(base):focus-visible {
    --sl-focus-ring-color: rgba(239, 68, 68, 0.4);
}

.save-dialog::part(footer) {
    /* border-top: 2px solid var(--glass-border); */
    background: transparent;
    padding: 1.25rem 1rem;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1rem;
    min-height: auto;
}

.snippet-dialog-footer {
    display: flex;
    gap: 1rem;
    width: 100%;
}

.snippet-dialog-footer sl-button {
    flex: 1;
}

.snippet-dialog-footer sl-button::part(base) {
    height: 2.25rem;
    font-weight: 600;
    border-color: var(--glass-border);
}


.save-dialog .syntax-editor {
    min-height: 80px;
}

.save-dialog .syntax-editor textarea,
.save-dialog .syntax-editor .highlight-overlay {
    height: 145px;
    padding: 0.75rem 1rem;
}

.dialog-section {
    padding: 0.75rem;
}

/* Ensure radio group takes full width */
.icon-selector {
    display: block;
    width: 100%;
}

/* Flexbox Fallback - CSS Grid proving unstable with nested Web Components here */
.icon-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0;
    margin-top: 0.5rem;
    width: 100%;
}

/* Tooltips as Flex Items */
.icon-grid sl-tooltip {
    flex: 1 0 3.25rem;
    /* Grow, Don't Shrink below basis, Base width */
    max-width: 1fr;
    /* Allow expansion */
    display: block;
    height: 3rem;
    /* Fixed height for consistency */
}

/* .icon-tile IS the sl-radio-button */
.icon-tile {
    width: 100%;
    display: block;
    flex: 1;
    /* Grow to fill tooltip flex container */
}

.icon-tile::part(button) {
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 6px !important;
    height: 3rem;
    width: 100%;
    padding: 0;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;

    transform: translateY(0);
    border-color: var(--glass-border);
    color: var(--text-muted);
    background: transparent;
}

.icon-tile:hover::part(button) {
    transform: translateY(0);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border-color: rgba(255, 255, 255, 0.2);
}

.icon-tile[checked]::part(label),
.icon-tile:active::part(label) {
    color: var(--accent) !important;
}

.icon-tile[checked]::part(button),
.icon-tile:active::part(button) {
    border: 1px solid rgba(59, 130, 246, 0.3) !important;
    background: rgba(59, 130, 246, 0.1) !important;
    color: var(--accent) !important;
    transition: all 0.2s ease;
}

.tile-content {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.tile-content sl-icon {
    font-size: 1.4rem;
    color: inherit;
    transition: color 0.2s;
}

.icon-tile[checked] sl-icon {
    color: var(--accent) !important;
}

.snippet-form label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.error-text {
    color: #f87171;
    /* red-400 */
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    animation: fadeInError 0.2s ease-out;
}

.error-text::before {
    content: "!";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1rem;
    height: 1rem;
    background: #f87171;
    color: #1e293b;
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 800;
}

@keyframes fadeInError {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subtle-help {
    font-size: 0.75rem;
    color: #64748b;
    margin-top: 0.4rem;
    line-height: 1.4;
}

.premium-save-btn {
    flex: 1;
    letter-spacing: 0.01em;
}

.premium-save-btn::part(base) {
    height: 2.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    background: linear-gradient(135deg, #2563eb 0%, #38bdf8 100%);
    border: none;
    color: var(--text);
    transition: box-shadow 0.2s ease, background 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.premium-save-btn::part(base):hover {
    background: linear-gradient(135deg, #1d4ed8 0%, #0891b2 100%);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.premium-save-btn::part(base):active {
    opacity: 0.9;
}

/* Pin Buttons */
.pin-btn::part(base) {
    color: var(--text-muted);
    opacity: 0.4;
    transition: all 0.2s;
}

.pin-btn:hover::part(base) {
    color: var(--sl-color-primary-400);
    opacity: 1;
    transform: scale(1.1);
}

.pin-btn.active::part(base) {
    color: #f59e0b !important;
    /* Amber 500 for pinned state */
    opacity: 1;

    &:hover::part(base) {
        color: #f59e0b !important;
        opacity: 1;
    }
}

.pinned-row {
    background: rgba(245, 158, 11, 0.02) !important;
}

/* --- Dialog Glass Effect (3D) --- */
.docs-dialog::part(panel),
.save-dialog::part(panel) {
    /* Match Main Card Blur */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;

    /* Fix for Tooltip Flickering: Force GPU layer to stabilize backdrop-filter */
    will-change: transform;
    transform: translateZ(0);
}

[data-theme="dark"] .docs-dialog::part(panel),
[data-theme="dark"] .save-dialog::part(panel) {
    background: linear-gradient(145deg,
            rgba(30, 41, 59, 0.6) 0%,
            rgba(15, 23, 42, 0.7) 100%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 24px -1px rgba(0, 0, 0, 0.2);
}

.docs-dialog::part(header),
.docs-dialog::part(body),
.docs-dialog::part(footer) {
    background: transparent !important;
}

.docs-dialog sl-tab-group::part(nav),
.docs-dialog sl-tab-group::part(body),
.docs-dialog sl-tab-panel {
    background: transparent !important;
}

/* Ensure Settings/About content areas are transparent */
.settings-content-area,
.about-content-area,
.settings-flex-wrapper,
.about-flex-wrapper {
    background: transparent !important;
}



/* Mobile Adaptive Dialogs */
@media (max-width: 768px) {
    sl-dialog::part(panel) {
        width: 100% !important;
        height: 100% !important;
        max-width: none !important;
        max-height: none !important;
        border-radius: 0 !important;
    }

    .save-dialog::part(panel),
    .docs-dialog::part(panel) {
        width: 100% !important;
        height: 100% !important;
    }
}

/* Dynamic Transparency for Main Panel */
.app-container {
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    padding: 1rem;
    box-sizing: border-box;
    /* Fast fade-in (return to normal) - 10ms as requested */
    transition: opacity 0.01s ease-out, filter 0.01s ease-out;
    opacity: 1;
    filter: blur(0px);
}

/* Base Mobile Overrides & Extreme Zoom */
@media (max-width: 768px) {
    .app-container {
        padding: 0.5rem;
        max-width: 100vw;
    }

    .status-indicator {
        display: none;
    }

    sl-card::part(body) {
        padding: 1rem;
    }

    .controls-top sl-select,
    .expression-combobox-dropdown {
        min-width: 0;
        flex: auto;
    }
}

.app-container.panel-transparent {
    /* Slower fade-out (going transparent) - 400ms to exceed dialog fade-in */
    transition: opacity 0.2s ease, filter 0.2s ease;
    /* When faded, main panel becomes a ghost layer */
    opacity: 0.25;
    filter: blur(4px);
    pointer-events: none;
}

/* Main Card 3D Glass */
.main-card::part(base) {
    backdrop-filter: blur(10px);
    border-radius: 16px;
}

[data-theme="dark"] .main-card::part(base) {
    background: linear-gradient(145deg,
            rgba(30, 41, 59, 0.6) 0%,
            rgba(15, 23, 42, 0.7) 100%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 24px -1px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .main-card {
    backdrop-filter: opacity(0.3) blur(1px) !important;
    background: linear-gradient(135deg, rgb(181 181 181 / 30%) 0%, rgb(255 255 255 / 0%) 100%) !important;
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2) !important;
    border-radius: 15px;
}

/* Clear History Button */
.btn-clear-all::part(base) {
    transition: all 0.2s ease;
}

.btn-clear-all:hover::part(base),
.btn-clear-all:focus-visible::part(base) {
    color: var(--error);
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

.combobox-footer {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
}

[data-theme="dark"] .combobox-footer {
    border-top: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
}

.btn-import-export::part(base) {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.btn-import-export:hover::part(base) {
    color: var(--text);
}

/* Stealth Action Buttons for Docs Toolbar */
.doc-action-btn::part(base) {
    /* Match standard input background for consistency */
    background-color: var(--sl-input-background-color);
    border-color: var(--glass-border);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
    height: 40px;
    min-width: 120px;
    /* Ensure minimum width to prevent truncation */
}

.doc-action-btn:hover::part(base) {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.2);
}

.doc-action-btn sl-icon {
    font-size: 1rem;
    /* color: var(--text-muted);  <-- Removed to allow SVG original colors */
    transition: filter 0.2s ease;
}

.doc-action-btn:hover sl-icon {
    /* color: var(--primary); <-- Removed */
    /* filter: brightness(1.2); */
}

/* Fix Tooltip Z-Index to appear above sticky headers */
sl-tooltip {
    --sl-tooltip-z-index: 10000;
}

sl-tooltip::part(body) {
    z-index: 10000;
}

/* --- Expression Library Table Fixes --- */
/* Consolidated into main blocks above or handled here if specific tweaks needed */
.ops-table-container {
    flex: 1;
    /* overflow: auto;  <-- REMOVED to allow full page scroll */
    position: relative;
    /* height: 100%; <-- REMOVED */
}

.ops-table {
    width: 100%;
    border-collapse: separate;
    /* Required for sticky to work well with borders sometimes */
    border-spacing: 0;
    font-size: 0.9rem;
}

.ops-table thead th {
    position: sticky;
    top: 0;
    background: #161f2fab;
    z-index: 20;
    /* Ensure it stays on top of content */
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.ops-table tbody td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: #cbd5e1;
}

.ops-table sl-badge::part(base),
.doc-category::part(base) {
    padding: 0.5em 0.8em !important;
    /* Force increased vertical padding */
    height: auto !important;
    /* Force allow height to grow with padding */
    line-height: normal !important;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    /* Space between icon and text */
}

.cat-icon {
    font-size: 1.1em;
    vertical-align: middle;
}

.ops-table tbody tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Fix double border on stepper buttons */
.btn-stepper::part(base),
.btn-stepper:focus::part(base),
.btn-stepper:focus-visible::part(base),
.btn-stepper:active::part(base) {
    outline: none !important;
}

.btn-stepper:focus::part(base),
.btn-stepper:focus-visible::part(base),
.btn-stepper:active::part(base) {
    background-color: rgba(56, 189, 248, 0.15);
}


.btn-stepper:hover::part(base) {
    background-color: rgba(56, 189, 248, 0.15);
}

/* Explicitly style action buttons in dropdown */
.action-btn.danger,
.action-btn.pinned {
    transition: color 0.2s;
}

.action-btn.danger:hover::part(base) {
    color: var(--error, #ef4444) !important;
    /* Red-500 */
}

.action-btn.pinned::part(base) {
    color: var(--warning, #f59e0b) !important;
    /* Yellow-500 */
}

/* Validation Result Styles */
.validation-result {
    margin-top: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--sl-border-radius-medium);
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;

}

.validation-result.valid {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.validation-result.invalid {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.valid-icon {
    font-size: 1.25rem;
    color: inherit;
}

.invalid-icon {
    font-size: 1.25rem;
    color: inherit;
    flex-shrink: 0;
}

.error-list {
    margin: 0;
    padding-left: 1.25rem;
    margin-top: 0.25rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.error-list li {
    margin-bottom: 0.25rem;
}

.btn-test::part(base) {
    color: var(--text-muted);
    transition: color 0.2s, background-color 0.2s;
}

.btn-test:hover::part(base) {
    color: var(--primary-light);
    background-color: rgba(56, 189, 248, 0.1);
    border-color: rgba(56, 189, 248, 0.3);
}



/* Hover state for unpinned pin button (Yellow) */
.action-btn:not(.pinned)[name="pin"]:hover::part(base),
.pin-btn:not(.active):hover::part(base) {
    color: var(--warning, #f59e0b) !important;
}

/* Light Theme - Docs & Settings Transparency Overrides */
/* Light Theme - Docs & Settings Transparency Overrides */
[data-theme="light"] .docs-header {
    background: linear-gradient(135deg, rgba(215, 215, 215, 0.4) 0%, rgba(163, 163, 163, 0.2) 100%) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
    border-bottom: 1px solid rgba(133, 133, 133, 0.3) !important;
}

[data-theme="light"] sl-tab-panel {
    background: transparent !important;
}

[data-theme="light"] .docs-list>.doc-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.1) 100%) !important;
    border: 1px solid rgb(151 151 151 / 31%) !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05) !important;
    backdrop-filter: none !important;
}

/* Light Theme - Functions List */
[data-theme="light"] .doc-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.1) 100%) !important;
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05) !important;
    backdrop-filter: blur(4px);
}

[data-theme="light"] .doc-card:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0.2) 100%) !important;
    border-color: var(--accent) !important;
}

[data-theme="light"] .doc-name {
    color: var(--sl-color-primary-600) !important;
}

[data-theme="light"] .doc-desc {
    color: #475569 !important;
    /* Slate 600 */
}

/* Light Theme - Operators & Library Table */
[data-theme="light"] .ops-table th {
    background: #a7a7a729;
    color: #334155 !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] .ops-table td {
    color: #334155 !important;
    /* Slate 700 */
    border-bottom: 1px solid rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] .ops-table tr:hover td {
    background: rgba(56, 189, 248, 0.1) !important;
    /* Sky 400 very light */
}

[data-theme="light"] .op-symbol {
    color: var(--sl-color-primary-600);
}

/* Light Theme - Settings Form */
[data-theme="light"] .settings-form .form-group label {
    color: #475569 !important;
    /* Slate 600 */
}

[data-theme="light"] .setting-icon {
    color: #64748b !important;
    /* Slate 500 */
    filter: none;
}

[data-theme="light"] .settings-form sl-input::part(base),
[data-theme="light"] .settings-form sl-select::part(combobox) {
    background: rgba(255, 255, 255, 0.3) !important;
    border-color: rgba(0, 0, 0, 0.1) !important;
}

[data-theme="light"] .docs-header sl-input:focus-within::part(base),
[data-theme="light"] .settings-form sl-input:focus-within::part(base) {
    background: rgba(255, 255, 255, 0.3) !important;
    border-color: var(--accent) !important;
}

/* Ensure the dialog body fills space so the form can flex */
.save-dialog::part(body) {
    display: flex;
    flex-direction: column;
}

#save-snippet-form {
    display: flex;
    flex-direction: column;
    flex: auto;
    height: 100%;

    >.dialog-section {
        &:last-child {
            flex: 1;
            align-content: end;
        }
    }
}

/* --- Mobile Layout Refactor (Full Screen & Immersive) --- */
@media (max-width: 768px) {
    body {
        /* Prevent background scroll bounce on mobile if needed */
        background-attachment: fixed;
    }

    .app-container {
        padding: 0 !important;
        margin: 0 !important;
        max-width: 100% !important;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }

    /* Main Card becomes the "Page" */
    .main-card {
        flex: 1;
        display: flex;
        flex-direction: column;
        border-radius: 0 !important;
    }

    .main-card::part(base) {
        border-radius: 0 !important;
        border: none !important;
        border-right: none !important;
        border-left: none !important;
        box-shadow: none !important;
        min-height: 100vh;
        /* Force full height */
    }

    /* Adjust Header inside card */
    .app-header {
        /* margin-bottom: 1rem; */
        /* padding-top: 1.5rem; */
        /* Status bar area */
        gap: 0.25rem;
    }

    .app-title {
        font-size: 1.75rem;
    }

    .app-subtitle {
        font-size: 0.8rem;
        padding: 0 1rem;
    }

    /* Hide Desktop/Footer Clutter */
    .contact-footer,
    .corner-logo-wrapper,
    .splash-banner,
    .app-banner {
        display: none !important;
    }

    /* Ensure Dialogs are Full Screen (Safety Net) */
    sl-dialog::part(panel) {
        width: 100% !important;
        height: 100% !important;
        max-width: none !important;
        max-height: none !important;
        border-radius: 0 !important;
        border: none !important;
    }

    /* Adjust Status Indicator positioning */
    .status-indicator {
        top: 0.75rem;
        right: 1rem;
    }

    /* Variables List - Keep horizontal but compact */
    .vars-list .var-row {
        flex-direction: row;
        align-items: center;
        gap: 0.25rem;
    }

    .vars-list .var-row sl-input {
        min-width: 0;
        /* Allow shrinking */
        flex: 1;
    }

    .vars-list .var-row .eq {
        display: block;
        /* Show equals sign again */
        margin: 0 0.1rem;
    }

    /* Adjust padding inside card body */
    .main-card::part(body) {
        padding: 0.5rem;
        /* Tighter padding */
        /* padding-bottom: 6rem; */
        /* Space for FABs */
        overflow: visible !important;
        /* Allow body to grow */
    }

    /* Unified Scrolling - History expands fully */
    .history-list {
        max-height: none !important;
        overflow: visible !important;
        height: auto !important;
    }

    /* Fix Controls Scaling (Docs & Settings) */
    .controls-top {
        flex-wrap: wrap;
    }

    .controls-top sl-button {
        width: 100%;
        /* Full width button on mobile */
    }

    /* Prevent History Result Bleeding */
    .history-item .result-value {
        word-break: break-all;
        overflow-wrap: break-word;
        white-space: normal;
    }
}

/* Modern Select Glassmorphism (Dark/Default) */
.modern-select::part(panel) {
    background: var(--glass-surface) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border) !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
    width: var(--modern-select-width, auto);
    min-width: var(--modern-select-width, auto);
}

.modern-select sl-menu {
    background: linear-gradient(145deg,
            rgba(30, 41, 59, 0.6) 0%,
            rgba(15, 23, 42, 0.7) 100%);
    box-shadow: 0 4px 24px -1px rgba(0, 0, 0, 0.2);
    border: none !important;
}

/* Light Theme - History Result */
[data-theme="light"] .hist-res {
    color: var(--success) !important;
    font-weight: 700;
}

/* Light Theme - Tooltip */
[data-theme="light"] sl-tooltip::part(body) {
    background-color: rgba(255, 255, 255, 0.9);
    color: #0f172a;
    /* Slate 900 */
    border: 1px solid #cbd5e1;
    /* Slate 300 */
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Light Theme - Status Icons */
[data-theme="light"] .status-indicator sl-icon {
    color: #0f172a;
    /* Slate 900 */
}

[data-theme="light"] .pwa-status {
    color: var(--success) !important;
}

[data-theme="light"] .engine-status:not(.is-loading) {
    color: #0f172a;
}

/* Light Theme - Dropdown Panel */
[data-theme="light"] .modern-select sl-menu {
    background: linear-gradient(135deg, rgb(255 255 255 / 80%) 0%, rgb(255 255 255 / 47%) 100%) !important;
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2) !important;
    backdrop-filter: brightness(0.7) !important;
}

/* Ensure menu items contrast */
[data-theme="light"] .modern-select sl-menu-item {
    color: #0f172a !important;
    /* Slate 900 */
}

[data-theme="light"] .modern-select sl-menu-item:hover,
[data-theme="light"] .modern-select sl-menu-item[checked],
[data-theme="light"] .modern-select sl-menu-item.is-selected {
    background-color: rgba(56, 189, 248, 0.2) !important;
    /* Sky 400 Light */
    color: #0f172a !important;
}

/* Light Theme - Pinned Icon */
[data-theme="light"] .pin-btn {
    color: #94a3b8 !important;
    /* Slate 400 */
    transition: color 0.2s ease;
}

[data-theme="light"] .pin-btn:hover {
    color: #475569 !important;
    /* Slate 600 */
}

[data-theme="light"] .pin-btn.active {
    color: var(--accent) !important;
}

/* Light Theme - Scrollbar */
[data-theme="light"] {
    scrollbar-color: #94a3b8 transparent;
    /* Slate 400 */
}

[data-theme="light"] ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

[data-theme="light"] ::-webkit-scrollbar-track {
    background: transparent;
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
    background-color: rgba(148, 163, 184, 0.8);
    /* Slate 400 */
    border-radius: 4px;
    border: 2px solid transparent;
    background-clip: content-box;
}

[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
    background-color: rgba(71, 85, 105, 0.8);
    /* Slate 600 */
}

/* Status Icons */
.pwa-status {
    color: var(--success) !important;
}

.engine-status {
    color: var(--success) !important;
    transition: color 0.3s ease;
}

.engine-status.is-loading {
    color: var(--warning) !important;
    animation: pulse 1.5s infinite ease-in-out;
}

/* Status Indicator Container - Positioning */
/* .status-indicator is already defined */

.status-indicator sl-icon {
    font-size: 1.25rem;
    filter: drop-shadow(0 0 8px rgba(0, 0, 0, 0.1));
}

/* Light Theme Function Example Buttons */
[data-theme="light"] .btn-example::part(base) {
    background-color: rgba(255, 255, 255, 0.2) !important;
    border-color: rgba(203, 213, 225, 0.6) !important;
    color: #475569 !important;
}

[data-theme="light"] .btn-example:hover::part(base) {
    background-color: rgba(255, 255, 255, 0.5) !important;
    border-color: var(--accent) !important;
    color: var(--accent) !important;
}