/* ==========================================================================
   Sistema de Gestión de Personal y Nómina (SDEP) — LiebeBlack Systems
   Design System Premium — Editorial / Modern / Elegant
   ========================================================================== */

/* --- Custom Properties & Theme Variables --- */
:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'SF Mono', Consolas, Monaco, monospace;

    /* Transition speeds */
    --t-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --t-base: 220ms cubic-bezier(0.4, 0, 0.2, 1);
    --t-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Light Theme Palette */
    --bg-canvas: #f7f9fc;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f2f5fa;
    --bg-subtle: #f1f5f9;
    --bg-muted: #e6ebf2;

    --border-subtle: #e5eaf1;
    --border-strong: #cdd6e1;
    --border-focus: #3b82f6;

    --text-primary: #0b1220;
    --text-secondary: #45556b;
    --text-tertiary: #8a97ab;
    --text-inverse: #ffffff;

    --accent: #2456e6;
    --accent-hover: #1a44c4;
    --accent-2: #7c3aed;
    --accent-subtle: #eef3ff;
    --accent-border: #c4d4fb;
    --accent-gradient: linear-gradient(135deg, #2456e6 0%, #6d28d9 100%);

    --shadow-xs: 0 1px 2px rgba(11, 18, 32, 0.04);
    --shadow-sm: 0 1px 3px rgba(11, 18, 32, 0.07), 0 1px 2px rgba(11, 18, 32, 0.04);
    --shadow-md: 0 6px 18px -4px rgba(11, 18, 32, 0.1), 0 2px 6px -1px rgba(11, 18, 32, 0.05);
    --shadow-lg: 0 18px 40px -8px rgba(11, 18, 32, 0.16), 0 6px 14px -4px rgba(11, 18, 32, 0.06);
    --shadow-glow: 0 0 0 1px rgba(36, 86, 230, 0.12), 0 8px 32px -6px rgba(36, 86, 230, 0.22);

    --code-bg: #f8fafd;
    --code-border: #e5eaf1;
    --code-text: #1c2740;

    --header-bg: rgba(255, 255, 255, 0.82);
    --header-border: rgba(229, 234, 241, 0.85);

    --sidebar-width: 290px;
    --toc-width: 240px;
}

/* Dark Theme Palette */
[data-theme="dark"] {
    --bg-canvas: #070b14;
    --bg-surface: #0d1424;
    --bg-surface-hover: #141d33;
    --bg-subtle: #111a2e;
    --bg-muted: #1b2540;

    --border-subtle: #1b2440;
    --border-strong: #2b3a5e;
    --border-focus: #60a5fa;

    --text-primary: #f4f7fd;
    --text-secondary: #96a3bd;
    --text-tertiary: #5f6d8a;
    --text-inverse: #070b14;

    --accent: #5b8bff;
    --accent-hover: #85a8ff;
    --accent-2: #a78bfa;
    --accent-subtle: rgba(91, 139, 255, 0.12);
    --accent-border: rgba(91, 139, 255, 0.32);
    --accent-gradient: linear-gradient(135deg, #5b8bff 0%, #a78bfa 100%);

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.45), 0 1px 2px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 44px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 0 1px rgba(91, 139, 255, 0.18), 0 10px 36px -6px rgba(91, 139, 255, 0.25);

    --code-bg: #080d19;
    --code-border: #1b2440;
    --code-text: #dde5f3;

    --header-bg: rgba(10, 15, 28, 0.82);
    --header-border: rgba(27, 36, 64, 0.85);
}

/* --- Base & Reset --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-canvas);
    color: var(--text-primary);
    line-height: 1.6;
    letter-spacing: -0.015em;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--t-base), color var(--t-base);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--t-fast);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

::selection {
    background-color: var(--accent);
    color: #ffffff;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

[id] {
    scroll-margin-top: 5.5rem;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 999px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

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

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.75rem;
    width: 100%;
}

/* --- Navigation Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
    backdrop-filter: blur(18px) saturate(1.4);
    -webkit-backdrop-filter: blur(18px) saturate(1.4);
    z-index: 100;
    transition: border-color var(--t-base), background-color var(--t-base);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 1.25rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.98rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    user-select: none;
}

.brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--accent-gradient);
    color: #ffffff;
    border-radius: 9px;
    font-size: 0.9rem;
    box-shadow: 0 2px 10px -2px rgba(36, 86, 230, 0.45);
}

.brand-name {
    white-space: nowrap;
}

.brand-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    padding: 0.14rem 0.5rem;
    border-radius: 999px;
    background-color: var(--accent-subtle);
    border: 1px solid var(--accent-border);
    color: var(--accent);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.nav-link {
    padding: 0.4rem 0.75rem;
    border-radius: 7px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--t-fast), background-color var(--t-fast);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* Search Trigger Pill */
.search-trigger-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.38rem 0.8rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: all var(--t-fast);
    box-shadow: var(--shadow-xs);
}

.search-trigger-btn:hover {
    border-color: var(--border-strong);
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
}

.search-icon {
    font-size: 0.85rem;
    line-height: 1;
}

.kbd-shortcut {
    display: inline-flex;
    align-items: center;
    padding: 0.12rem 0.35rem;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    background-color: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    color: var(--text-tertiary);
}

/* Theme Switcher & Icon Buttons */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    background-color: var(--bg-surface);
    color: var(--text-secondary);
    transition: all var(--t-fast);
}

.icon-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
    border-color: var(--border-strong);
}

.theme-icon {
    font-size: 0.9rem;
    line-height: 1;
}

.github-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.38rem 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    background-color: var(--bg-surface);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--t-fast);
}

.github-btn:hover {
    border-color: var(--accent);
    background-color: var(--bg-surface-hover);
    box-shadow: var(--shadow-glow);
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
    display: none;
    font-size: 1rem;
    line-height: 1;
}

/* --- Hero Section --- */
.hero {
    padding: 8.5rem 0 4.75rem;
    position: relative;
    isolation: isolate;
}

.hero::before {
    content: "";
    position: absolute;
    left: -14%;
    right: -14%;
    top: 14%;
    height: 46%;
    background: radial-gradient(58% 72% at 16% 22%, rgba(36, 86, 230, 0.09), transparent 68%),
                radial-gradient(50% 60% at 88% 16%, rgba(124, 58, 237, 0.08), transparent 72%),
                radial-gradient(38% 44% at 62% 62%, rgba(16, 185, 129, 0.05), transparent 75%);
    pointer-events: none;
    z-index: 0;
}

.hero > * {
    position: relative;
    z-index: 1;
}

.hero > *:nth-child(1) { animation: fadeSlide 0.55s ease-out both; }
.hero > *:nth-child(2) { animation: fadeSlide 0.55s ease-out 0.08s both; }
.hero > *:nth-child(3) { animation: fadeSlide 0.55s ease-out 0.16s both; }
.hero > *:nth-child(4) { animation: fadeSlide 0.55s ease-out 0.24s both; }
.hero > *:nth-child(5) { animation: fadeSlide 0.55s ease-out 0.32s both; }

@keyframes fadeSlide {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-pill-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.38rem 1rem;
    border-radius: 999px;
    background-color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid var(--border-subtle);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 2rem;
    transition: transform var(--t-fast), box-shadow var(--t-fast), border-color var(--t-fast);
}

[data-theme="dark"] .hero-pill-link {
    background-color: rgba(13, 20, 36, 0.6);
}

.hero-pill-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    border-color: var(--accent-border);
}

.hero-pill-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: #10b981;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.55);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.6rem, 6vw, 4.1rem);
    font-weight: 700;
    line-height: 1.07;
    letter-spacing: -0.04em;
    max-width: 940px;
    margin-bottom: 1.5rem;
}

.hero-title .gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.68;
    color: var(--text-secondary);
    max-width: 660px;
    margin-bottom: 2.5rem;
    font-weight: 400;
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    margin-bottom: 3.75rem;
}

/* Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.45rem;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--t-fast);
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 2px 12px -2px rgba(36, 86, 230, 0.4), 0 10px 30px -8px rgba(109, 40, 217, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.16);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow), 0 12px 34px -8px rgba(36, 86, 230, 0.4);
}

.btn-secondary {
    background-color: var(--bg-surface);
    border-color: var(--border-subtle);
    color: var(--text-primary);
    box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--border-strong);
    transform: translateY(-1px);
}

/* --- Interactive Hero Code / Preview Component --- */
.hero-code-wrapper {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: 3.25rem;
}

.hero-code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 0.75rem 1.15rem;
    background-color: var(--bg-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.window-dots {
    display: flex;
    gap: 7px;
}

.window-dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}
.window-dot.red { background-color: #ef4444; }
.window-dot.yellow { background-color: #f59e0b; }
.window-dot.green { background-color: #10b981; }

.hero-code-tabs {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.code-tab-btn {
    padding: 0.35rem 0.8rem;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 7px;
    transition: all var(--t-fast);
}

.code-tab-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
}

.code-tab-btn.active {
    color: var(--text-primary);
    background-color: var(--bg-surface);
    box-shadow: var(--shadow-xs);
    font-weight: 600;
}

.code-copy-btn {
    font-size: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.7rem;
    border-radius: 7px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    transition: all var(--t-fast);
}

.code-copy-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-strong);
    background-color: var(--bg-surface-hover);
}

.copy-icon {
    font-size: 0.8rem;
    line-height: 1;
}

.hero-code-body {
    padding: 1.3rem 1.6rem;
    overflow-x: auto;
}

.hero-code-snippet {
    display: none;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.75;
    color: var(--code-text);
}

.hero-code-snippet.active {
    display: block;
}

/* --- Stats Metrics Section --- */
.stats-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.75rem;
    padding: 2.1rem 2.5rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 4.5rem;
    position: relative;
    overflow: hidden;
}

.stats-strip::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
    opacity: 0.85;
}

.stat-box {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0;
    border: 0;
    position: relative;
}

.stat-box + .stat-box::before {
    content: "";
    position: absolute;
    left: -0.875rem;
    top: 12%;
    bottom: 12%;
    width: 1px;
    background-color: var(--border-subtle);
}

.stat-box:first-child::before {
    display: none;
}

.stat-val {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.035em;
    color: var(--text-primary);
    line-height: 1;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-lbl {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-sub {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    line-height: 1.35;
}

/* --- Section Titles --- */
.section {
    padding: 4.75rem 0;
}

.section-head {
    margin-bottom: 2.5rem;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    color: var(--accent);
    margin-bottom: 0.6rem;
}

.section-tag::before {
    content: "";
    width: 1.4rem;
    height: 1px;
    background-color: var(--accent);
    opacity: 0.7;
}

.section-heading {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3.4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
    line-height: 1.15;
}

.section-subtext {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 620px;
    line-height: 1.6;
}

/* --- Features Grid --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 3.75rem;
}

.feature-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 1.75rem;
    transition: all var(--t-base);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xs);
    position: relative;
    overflow: hidden;
}

.feature-item::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--t-base);
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-border);
}

.feature-item:hover::after {
    transform: scaleX(1);
}

.feature-icon-wrap {
    width: 42px;
    height: 42px;
    border-radius: 11px;
    background: var(--accent-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 1.1rem;
    border: 1px solid var(--accent-border);
}

.feature-h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.015em;
}

.feature-p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.feature-link {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: gap var(--t-fast), color var(--t-fast);
}

.feature-link:hover {
    gap: 0.6rem;
    color: var(--accent-hover);
}

/* --- Architecture Clean Block --- */
.arch-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 2rem 2.25rem;
    box-shadow: var(--shadow-sm);
}

.arch-flow {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.9rem;
    margin-top: 1.75rem;
    position: relative;
}

.arch-layer {
    background-color: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: 11px;
    padding: 1.1rem 0.9rem;
    text-align: center;
    transition: all var(--t-fast);
}

.arch-layer:hover {
    transform: translateY(-2px);
    border-color: var(--accent-border);
    background-color: var(--accent-subtle);
    box-shadow: var(--shadow-sm);
}

.arch-layer-num {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.4rem;
    letter-spacing: 0.04em;
}

.arch-layer-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
    letter-spacing: -0.01em;
}

.arch-layer-desc {
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

/* Tech Tags Pills */
.tech-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 1.75rem;
    justify-content: center;
}

.tech-pill {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    letter-spacing: -0.01em;
    transition: all var(--t-fast);
}

.tech-pill:hover {
    color: var(--accent);
    border-color: var(--accent-border);
    background-color: var(--accent-subtle);
}

/* --- Centralized Documents Catalog Portal --- */
.catalog-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.75rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.catalog-tabs {
    display: flex;
    gap: 0.35rem;
    background-color: var(--bg-surface);
    padding: 0.25rem;
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
}

.catalog-tab {
    padding: 0.42rem 0.9rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-radius: 7px;
    transition: all var(--t-fast);
}

.catalog-tab:hover {
    color: var(--text-primary);
}

.catalog-tab.active {
    background-color: var(--accent-subtle);
    color: var(--accent);
    box-shadow: inset 0 0 0 1px var(--accent-border);
}

.catalog-search-wrap {
    position: relative;
    min-width: 240px;
}

.catalog-search-input {
    width: 100%;
    padding: 0.5rem 0.85rem 0.5rem 2.15rem;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    background-color: var(--bg-surface);
    font-size: 0.82rem;
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

.catalog-search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(36, 86, 230, 0.1);
}

.catalog-search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8rem;
    color: var(--text-tertiary);
    pointer-events: none;
}

/* Document Cards Grid */
.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
    gap: 1rem;
    animation: fadeSlide 0.5s ease-out both;
}

.doc-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 13px;
    padding: 1.4rem 1.5rem;
    transition: all var(--t-base);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xs);
    position: relative;
    overflow: hidden;
}

.doc-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--accent-gradient);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--t-base);
}

.doc-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-border);
}

.doc-card:hover::before {
    transform: scaleY(1);
}

.doc-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.8rem;
}

.doc-card-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    background-color: var(--accent-subtle);
    color: var(--accent);
    border: 1px solid var(--accent-border);
    letter-spacing: 0.01em;
}

.doc-card-readtime {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.doc-card-title {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.45rem;
    line-height: 1.35;
    letter-spacing: -0.015em;
}

.doc-card-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.55;
    margin-bottom: 1.1rem;
    flex-grow: 1;
}

.doc-card-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.8rem;
    border-top: 1px solid var(--border-subtle);
}

.doc-card-btn {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: gap var(--t-fast), color var(--t-fast);
}

.doc-card-btn:hover {
    gap: 0.6rem;
    color: var(--accent-hover);
}

.doc-card-ghlink {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    transition: color var(--t-fast);
    font-family: var(--font-mono);
}

.doc-card-ghlink:hover {
    color: var(--text-primary);
}

/* ==========================================================================
   IN-WEB MARKDOWN READER (Full Experience)
   ========================================================================== */
#reader-view {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-canvas);
    z-index: 200;
    overflow-y: hidden;
    flex-direction: column;
}

#reader-view.active {
    display: flex;
}

/* Reader Top Bar */
.reader-navbar {
    height: 52px;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
    backdrop-filter: blur(18px) saturate(1.4);
    -webkit-backdrop-filter: blur(18px) saturate(1.4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    flex-shrink: 0;
    z-index: 210;
}

.reader-nav-left {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    min-width: 0;
}

.reader-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.7rem;
    border-radius: 7px;
    border: 1px solid var(--border-subtle);
    background-color: var(--bg-surface);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: all var(--t-fast);
    white-space: nowrap;
}

.reader-back-btn:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--border-strong);
}

.reader-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    color: var(--text-tertiary);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.reader-breadcrumbs .sep {
    color: var(--border-strong);
}

.reader-breadcrumbs .current {
    color: var(--text-primary);
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reader-nav-right {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
}

/* Reading Progress Bar */
.reading-progress-bar {
    position: absolute;
    bottom: -1px;
    left: 0;
    height: 2px;
    background: var(--accent-gradient);
    width: 0%;
    transition: width 0.1s linear;
    z-index: 220;
}

/* Reader Main Content Layout */
.reader-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Reader Left Sidebar (Document List) */
.reader-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-subtle);
    overflow-y: auto;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    transition: transform var(--t-base);
}

.reader-sidebar-search {
    padding: 0.7rem 0.9rem;
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    background-color: var(--bg-surface);
    z-index: 10;
}

.sidebar-search-input {
    width: 100%;
    padding: 0.4rem 0.7rem 0.4rem 1.8rem;
    border-radius: 6px;
    border: 1px solid var(--border-subtle);
    background-color: var(--bg-subtle);
    font-size: 0.78rem;
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

.sidebar-search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(36, 86, 230, 0.1);
}

.sidebar-search-icon {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    pointer-events: none;
}

.reader-sidebar-nav {
    padding: 0.85rem 0.6rem;
    flex: 1;
}

.sidebar-category-title {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    padding: 0.45rem 0.6rem;
    margin-top: 0.7rem;
}

.sidebar-category-title:first-child {
    margin-top: 0;
}

.sidebar-doc-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: all var(--t-fast);
    line-height: 1.35;
    margin-bottom: 0.1rem;
}

.sidebar-doc-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
}

.sidebar-doc-link.active {
    color: var(--accent);
    background-color: var(--accent-subtle);
    font-weight: 600;
}

.sidebar-doc-badge {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    padding: 0.08rem 0.3rem;
    border-radius: 3px;
    background-color: var(--bg-subtle);
    color: var(--text-tertiary);
    margin-left: auto;
}

/* Reader Main Article Scroll Area */
.reader-main {
    flex: 1;
    overflow-y: auto;
    padding: 2.5rem 3.5rem 5rem;
    display: flex;
    justify-content: center;
    scroll-behavior: smooth;
}

.reader-article {
    max-width: 780px;
    width: 100%;
}

/* Article Header */
.article-meta-header {
    margin-bottom: 2.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
}

.article-tags-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.7rem;
    flex-wrap: wrap;
}

.article-category-badge {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.18rem 0.55rem;
    border-radius: 999px;
    background-color: var(--accent-subtle);
    color: var(--accent);
    border: 1px solid var(--accent-border);
}

.article-stat-pill {
    font-size: 0.72rem;
    color: var(--text-tertiary);
}

.article-main-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3.5vw, 2.25rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
}

.article-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* Reader Right TOC (Table of Contents) */
.reader-toc-sidebar {
    width: var(--toc-width);
    padding: 2.25rem 1.25rem;
    overflow-y: auto;
    flex-shrink: 0;
    border-left: 1px solid var(--border-subtle);
    background-color: var(--bg-canvas);
    position: sticky;
    top: 0;
    height: 100%;
}

.toc-title {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    margin-bottom: 0.85rem;
}

.toc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.toc-item {
    font-size: 0.75rem;
    line-height: 1.4;
}

.toc-item.level-2 {
    padding-left: 0.5rem;
}

.toc-item.level-3 {
    padding-left: 1rem;
}

.toc-link {
    color: var(--text-secondary);
    display: block;
    padding: 0.18rem 0;
    transition: color var(--t-fast);
}

.toc-link:hover {
    color: var(--text-primary);
}

.toc-link.active {
    color: var(--accent);
    font-weight: 600;
}

/* Article Navigation Cards (Prev / Next) */
.article-nav-footer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-top: 3.5rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border-subtle);
}

.nav-card {
    padding: 1.1rem 1.25rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 11px;
    transition: all var(--t-fast);
    display: flex;
    flex-direction: column;
}

.nav-card:hover {
    border-color: var(--accent-border);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.nav-card-sub {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    margin-bottom: 0.3rem;
}

.nav-card-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.nav-card.next {
    text-align: right;
}

/* ==========================================================================
   MARKDOWN RENDERED TYPOGRAPHY (Modern Editorial Reader)
   ========================================================================== */

.markdown-body {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    word-break: break-word;
    hyphens: auto;
}

.markdown-body :where(p, ul, ol, blockquote, pre, table, figure, .gh-alert) {
    color: var(--text-secondary);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    color: var(--text-primary);
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
    scroll-margin-top: 5rem;
    line-height: 1.2;
}

.markdown-body > h1:first-child {
    margin-top: 0;
}

.markdown-body h1 {
    font-size: 1.85rem;
    margin-top: 2.5rem;
    margin-bottom: 1.1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.markdown-body h2 {
    font-size: 1.4rem;
    margin-top: 2.25rem;
    margin-bottom: 0.85rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--border-subtle);
}

.markdown-body h3 {
    font-size: 1.15rem;
    margin-top: 1.75rem;
    margin-bottom: 0.6rem;
}

.markdown-body h4 {
    font-size: 1rem;
    margin-top: 1.4rem;
    margin-bottom: 0.45rem;
}

.markdown-body h5 {
    font-size: 0.92rem;
    margin-top: 1.2rem;
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.markdown-body h6 {
    font-size: 0.85rem;
    margin-top: 1rem;
    margin-bottom: 0.4rem;
    color: var(--text-tertiary);
}

.markdown-body p {
    margin-bottom: 1.1rem;
}

.markdown-body p:last-child {
    margin-bottom: 0;
}

.markdown-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.markdown-body em {
    font-style: italic;
}

.markdown-body a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: var(--accent-border);
    text-underline-offset: 3px;
    transition: color var(--t-fast), text-decoration-color var(--t-fast);
}

.markdown-body a:hover {
    color: var(--accent-hover);
    text-decoration-color: var(--accent);
}

/* Anchor Link on Headings */
.header-anchor {
    position: absolute;
    left: -1.35rem;
    opacity: 0;
    color: var(--text-tertiary);
    text-decoration: none !important;
    font-weight: 400;
    font-size: 0.9em;
    transition: opacity var(--t-fast);
    line-height: 1;
}

.markdown-body h1:hover .header-anchor,
.markdown-body h2:hover .header-anchor,
.markdown-body h3:hover .header-anchor,
.markdown-body h4:hover .header-anchor {
    opacity: 1;
}

/* Lists */
.markdown-body ul,
.markdown-body ol {
    margin-bottom: 1.1rem;
    padding-left: 1.4rem;
    margin-top: 0.5rem;
}

.markdown-body li {
    margin-bottom: 0.3rem;
}

.markdown-body li > ul,
.markdown-body li > ol {
    margin-top: 0.35rem;
    margin-bottom: 0.35rem;
}

.markdown-body li > p {
    margin-bottom: 0.5rem;
}

/* Task list checkboxes */
.markdown-body input[type="checkbox"] {
    margin-right: 0.45rem;
    accent-color: var(--accent);
}

/* Blockquotes */
.markdown-body blockquote {
    margin: 1.25rem 0;
    padding: 0.85rem 1.2rem;
    border-left: 3px solid var(--accent);
    background-color: var(--bg-subtle);
    border-radius: 0 8px 8px 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.markdown-body blockquote p:last-child {
    margin-bottom: 0;
}

/* GitHub Callouts / Alerts */
.gh-alert {
    margin: 1.4rem 0;
    padding: 0.9rem 1.1rem;
    border-radius: 10px;
    border-left: 3px solid;
    font-size: 0.92rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
}

.gh-alert-header {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 700;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: fit-content;
}

.gh-alert-content {
    color: var(--text-secondary);
}

.gh-alert-content p {
    margin-bottom: 0;
}

.gh-alert-note {
    border-left-color: var(--accent);
    background-color: var(--accent-subtle);
    border-color: var(--accent-border);
}

.gh-alert-note .gh-alert-header { color: var(--accent); }

.gh-alert-tip {
    border-left-color: #10b981;
    background-color: rgba(16, 185, 129, 0.07);
    border-color: rgba(16, 185, 129, 0.25);
}

.gh-alert-tip .gh-alert-header { color: #10b981; }

.gh-alert-important {
    border-left-color: #8b5cf6;
    background-color: rgba(139, 92, 246, 0.07);
    border-color: rgba(139, 92, 246, 0.25);
}

.gh-alert-important .gh-alert-header { color: #8b5cf6; }

.gh-alert-warning {
    border-left-color: #f59e0b;
    background-color: rgba(245, 158, 11, 0.07);
    border-color: rgba(245, 158, 11, 0.25);
}

.gh-alert-warning .gh-alert-header { color: #f59e0b; }

.gh-alert-caution {
    border-left-color: #ef4444;
    background-color: rgba(239, 68, 68, 0.07);
    border-color: rgba(239, 68, 68, 0.25);
}

.gh-alert-caution .gh-alert-header { color: #ef4444; }

/* Inline Code */
.markdown-body code:not([class*="language-"]) {
    font-family: var(--font-mono);
    font-size: 0.85em;
    padding: 0.18rem 0.45rem;
    border-radius: 6px;
    background-color: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    color: var(--accent);
    line-height: 1.4;
}

.markdown-body a code {
    color: var(--accent);
    text-decoration: none;
}

/* Code Blocks */
.code-block-wrapper {
    position: relative;
    margin: 1.4rem 0;
    border-radius: 11px;
    border: 1px solid var(--code-border);
    background-color: var(--code-bg);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
}

.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.45rem 1rem;
    background-color: var(--bg-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.code-lang-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.code-btn-copy {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.5rem;
    border-radius: 5px;
    font-size: 0.68rem;
    font-weight: 500;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    transition: all var(--t-fast);
    line-height: 1;
}

.code-btn-copy:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.code-block-wrapper pre {
    margin: 0;
    padding: 1.2rem 1.2rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--code-text);
    background-color: transparent !important;
    tab-size: 4;
    -moz-tab-size: 4;
}

.code-block-wrapper :where(pre, code) {
    background: transparent;
    border: 0;
    padding: 0;
}

/* Tables */
.markdown-body table {
    width: 100%;
    margin: 1.4rem 0;
    border-collapse: collapse;
    font-size: 0.85rem;
    overflow-x: auto;
    display: block;
}

.markdown-body table::-webkit-scrollbar {
    height: 6px;
}

.markdown-body th,
.markdown-body td {
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--border-subtle);
    text-align: left;
    vertical-align: top;
}

.markdown-body th {
    background-color: var(--bg-subtle);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.8rem;
    letter-spacing: 0.01em;
}

.markdown-body tr:nth-child(even) td {
    background-color: var(--bg-subtle);
}

.markdown-body tbody tr {
    transition: background-color var(--t-fast);
}

.markdown-body tbody tr:hover td {
    background-color: var(--bg-surface-hover);
}

/* Horizontal Rule */
.markdown-body hr {
    margin: 2.25rem 0;
    border: none;
    border-top: 1px solid var(--border-subtle);
}

/* Definitions / Description Lists */
.markdown-body dl {
    margin: 1.25rem 0;
}

.markdown-body dt {
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.75rem;
}

.markdown-body dd {
    margin: 0.25rem 0 0.75rem 1.2rem;
    color: var(--text-secondary);
}

/* Images */
.markdown-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
    margin: 1.25rem 0;
    border: 1px solid var(--border-subtle);
}

.markdown-body figure {
    margin: 1.25rem 0;
}

.markdown-body figcaption {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-align: center;
}

/* Highlighted / mark */
.markdown-body mark {
    background-color: var(--accent-subtle);
    color: var(--text-primary);
    border-radius: 3px;
    padding: 0.05rem 0.2rem;
}

/* Footnotes style (if present) */
.markdown-body .footnote,
.markdown-body .footnotes {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    border-top: 1px solid var(--border-subtle);
    margin-top: 2rem;
    padding-top: 1rem;
}

/* ==========================================================================
   COMMAND PALETTE / MODAL SEARCH (Ctrl + K)
   ========================================================================== */
.palette-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(4, 8, 18, 0.68);
    backdrop-filter: blur(6px);
    z-index: 300;
    align-items: flex-start;
    justify-content: center;
    padding-top: 10vh;
}

.palette-overlay.active {
    display: flex;
}

.palette-box {
    width: 100%;
    max-width: 640px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: scaleUp 0.16s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes scaleUp {
    from { transform: scale(0.97); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.palette-input-wrap {
    display: flex;
    align-items: center;
    padding: 0.9rem 1.1rem;
    border-bottom: 1px solid var(--border-subtle);
    gap: 0.7rem;
}

.palette-icon {
    font-size: 1rem;
    color: var(--text-tertiary);
}

.palette-input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
    letter-spacing: -0.01em;
}

.palette-results {
    max-height: 380px;
    overflow-y: auto;
    padding: 0.5rem;
}

.palette-item {
    display: flex;
    flex-direction: column;
    padding: 0.65rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color var(--t-fast);
}

.palette-item:hover,
.palette-item.selected {
    background-color: var(--bg-surface-hover);
}

.palette-item-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.2rem;
}

.palette-item-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.palette-item-badge {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    color: var(--accent);
    background-color: var(--accent-subtle);
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
}

.palette-item-snippet {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.palette-empty {
    padding: 2rem 1.25rem;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.palette-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1.1rem;
    background-color: var(--bg-subtle);
    border-top: 1px solid var(--border-subtle);
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

.palette-shortcuts {
    display: flex;
    gap: 0.85rem;
}

/* Toast Feedback */
.toast-msg {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--text-primary);
    color: var(--bg-canvas);
    padding: 0.65rem 1.15rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 400;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--t-base);
    pointer-events: none;
}

.toast-msg.show {
    transform: translateY(0);
    opacity: 1;
}

/* --- Footer --- */
.footer {
    margin-top: auto;
    border-top: 1px solid var(--border-subtle);
    background-color: var(--bg-surface);
    padding: 4rem 0 2rem;
    position: relative;
}

.footer::before {
    content: "";
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-border), transparent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3.5rem;
}

.footer-brand {
    max-width: 320px;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.75rem;
    line-height: 1.6;
}

.footer-col-title {
    font-size: 0.825rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-links a {
    font-size: 0.825rem;
    color: var(--text-secondary);
    transition: color var(--t-fast);
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ==========================================================================
   RESPONSIVE DESIGN & PRINT STYLES
   ========================================================================== */
@media (max-width: 1100px) {
    .reader-toc-sidebar {
        display: none;
    }
    .reader-main {
        padding: 2.5rem 2rem 5rem;
    }
}

@media (max-width: 900px) {
    .hero-title {
        font-size: 2.4rem;
    }
    .stats-strip {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.75rem;
        padding: 1.75rem 1.5rem;
    }
    .stats-strip .stat-box + .stat-box::before {
        display: none;
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    .arch-flow {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    .nav-menu.open {
        display: flex;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
        padding: 1rem 1.25rem 1.25rem;
        background-color: var(--bg-surface);
        border-bottom: 1px solid var(--border-subtle);
        box-shadow: var(--shadow-lg);
        z-index: 99;
    }
    .mobile-nav-toggle {
        display: inline-flex;
    }
    .search-trigger-btn span:last-of-type {
        display: none;
    }
    .search-trigger-btn .kbd-shortcut {
        display: none;
    }
    .hero-title {
        font-size: 2.15rem;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .docs-grid {
        grid-template-columns: 1fr;
    }
    .stats-strip {
        grid-template-columns: 1fr;
        padding: 1.5rem;
    }
    .article-nav-footer {
        grid-template-columns: 1fr;
    }
    .reader-sidebar {
        position: fixed;
        left: 0;
        top: 56px;
        bottom: 0;
        z-index: 250;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    .reader-sidebar.open {
        transform: translateX(0);
    }
    .reader-main {
        padding: 1.5rem 1rem 4rem;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }
}


/* Indicador de sincronizacion del lector (GitHub En Vivo / Copia Local) */
.sync-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background-color: var(--bg-surface);
    color: var(--text-secondary);
}

.sync-badge.live {
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.3);
    background-color: rgba(16, 185, 129, 0.08);
}

.sync-badge.local {
    color: var(--accent);
    border-color: var(--accent-border);
    background-color: var(--accent-subtle);
}

.sync-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: currentColor;
}

.sync-badge.live .sync-dot {
    box-shadow: 0 0 6px #10b981;
}

/* Reduced Motion (accessibility) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Print Friendly Styles */
@media print {
    .header,
    .reader-navbar,
    .reader-sidebar,
    .reader-toc-sidebar,
    .article-nav-footer,
    .palette-overlay,
    .footer {
        display: none !important;
    }
    #reader-view {
        position: static !important;
        display: block !important;
        background: #ffffff !important;
        color: #000000 !important;
    }
    .reader-main {
        padding: 0 !important;
    }
    .markdown-body {
        font-size: 11pt;
        line-height: 1.5;
        color: #000000 !important;
    }
    .markdown-body pre,
    .markdown-body code {
        background: #f1f5f9 !important;
        color: #000000 !important;
    }
}

/* Brand Responsive: nombre completo <-> monograma SDEP */
.brand-name-short {
    display: none;
}

@media (max-width: 1220px) {
    .brand-name-full {
        display: none;
    }
    .brand-name-short {
        display: inline;
    }
}