/* ==========================================================================
   NLP Text Preprocessing Documentation
   Design System: Multimodel Analysis — Enterprise Edition
   Aligned to DESIGN.md specification v1.0
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600&family=Inter:wght@300;400;500;600;700;800&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css');

/* ==========================================================================
   1. DESIGN TOKENS — Light Theme (Default)
   ========================================================================== */
:root {
    /* — Primary Palette — */
    --color-slate-900: #0F172A;
    --color-slate-700: #334155;
    --color-slate-600: #475569;
    --color-slate-200: #E2E8F0;
    --color-slate-100: #F1F5F9;
    --color-slate-50:  #F8FAFC;
    --color-white:     #FFFFFF;
    --color-black:     #000000;

    /* — Accent Palette — */
    --color-cyan-600:    #0284C7;
    --color-cyan-500:    #06B6D4;
    --color-emerald-600: #059669;
    --color-emerald-500: #10B981;
    --color-rose-500:    #F43F5E;
    --color-amber-600:   #D97706;
    --color-violet-600:  #7C3AED;

    /* — Semantic Status — */
    --color-success: #28C840;
    --color-error:   #E11D48;
    --color-warning: #F59E0B;

    /* — Surface & Border — */
    --surface-primary:   var(--color-white);
    --surface-secondary: var(--color-slate-50);
    --border-subtle:     var(--color-slate-200);
    --border-strong:     rgba(15, 23, 42, 0.08);

    /* — Semantic Aliases (used throughout) — */
    --bg-obsidian:       var(--color-slate-50);
    --bg-surface:        var(--color-white);
    --bg-card:           rgba(255, 255, 255, 0.85);
    --glass-bg:          rgba(255, 255, 255, 0.9);
    --glass-border:      rgba(0, 0, 0, 0.08);
    --glass-border-hover: rgba(6, 182, 212, 0.5);

    --accent-cyan:          var(--color-cyan-600);
    --accent-cyan-light:    var(--color-cyan-500);
    --accent-cyan-glow:     rgba(6, 182, 212, 0.35);
    --accent-emerald:       var(--color-emerald-600);
    --accent-emerald-light: var(--color-emerald-500);
    --accent-emerald-glow:  rgba(16, 185, 129, 0.35);
    --accent-violet:        var(--color-violet-600);
    --accent-rose:          var(--color-rose-500);
    --accent-amber:         var(--color-amber-600);

    /* — Gradients — */
    --accent-gradient: linear-gradient(135deg, var(--color-cyan-600), var(--color-emerald-500));
    --hero-gradient:   linear-gradient(135deg, #06B6D4 0%, #3B82F6 50%, #8B5CF6 100%);
    --platform-gradient: linear-gradient(135deg, #0284C7 0%, #06B6D4 100%);

    /* — Typography — */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    --font-system: Arial, Helvetica, sans-serif;

    --text-main:     var(--color-slate-900);
    --text-muted:    var(--color-slate-700);
    --text-dim:      var(--color-slate-600);
    --text-on-accent: var(--color-white);

    /* — Typography Scale (DESIGN.md §3) — */
    --fs-display: 3.25rem;    /* 52px — H1 / Hero (reduced by ~3pt / 12px) */
    --fs-h2:      1.75rem;    /* 28px — Section (reduced by ~3pt / 4px) */
    --fs-h3:      1.05rem;    /* 16.8px — Subtitle (reduced by ~2pt / 2.4px) */
    --fs-body:    1.35rem;    /* 21.6px — Body copy */
    --fs-label:   1.25rem;    /* 20px — Bold label */
    --fs-small:   0.85rem;    /* 13.6px — Helper/caption */
    --fs-list:    1rem;       /* 16px — List/nav */
    --fs-btn:     1.5rem;     /* 24px — Primary button (Arial) */
    --fs-btn-alt: 0.875rem;   /* 14px — Secondary button (Inter) */
    --fs-code:    1rem;       /* 16px — Code block */
    --fs-code-inline: 0.82rem; /* 13.12px — Inline code */

    /* — Line Heights — */
    --lh-display: 1.15;
    --lh-h2:      1.6;
    --lh-body:    1.6;
    --lh-code:    1.6;

    /* — Shadow System (DESIGN.md §6) — */
    --shadow-level0: none;
    --shadow-level1: rgba(0, 0, 0, 0.05) 0px 4px 6px -1px;
    --shadow-level2: rgba(16, 185, 129, 0.25) 0px 4px 15px 0px;
    --shadow-level3: rgb(2, 132, 199) 0px -1px 0px 0px;
    --shadow-level4: rgba(0, 0, 0, 0.15) 0px 10px 25px 0px;

    /* — Legacy aliases — */
    --shadow-sm: var(--shadow-level1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
    --shadow-lg: var(--shadow-level4);
    --shadow-glow: 0 0 25px var(--accent-cyan-glow);

    /* — Code & Table — */
    --code-bg:       var(--color-slate-50);
    --code-header:   var(--color-slate-200);
    --table-header:  var(--color-slate-200);
    --table-row-even: rgba(0, 0, 0, 0.02);
    --table-row-hover: rgba(6, 182, 212, 0.08);

    /* — Code Block Theme (light) — */
    --cb-bg:           #f6f8fa;          /* GitHub Light body */
    --cb-header-bg:    #eaeef2;          /* GitHub Light header */
    --cb-border:       rgba(0, 0, 0, 0.1);
    --cb-header-sep:   rgba(0, 0, 0, 0.08);
    --cb-gutter:       rgba(2, 132, 199, 0.35);
    --cb-text:         #24292f;          /* GitHub Light base text */
    --cb-dot-ring:     rgba(0,0,0,0.15);
    --cb-badge-color:  rgba(0, 0, 0, 0.4);
    --cb-copy-bg:      rgba(0, 0, 0, 0.05);
    --cb-copy-border:  rgba(0, 0, 0, 0.12);
    --cb-copy-color:   rgba(0, 0, 0, 0.45);
    --cb-scrollbar:    rgba(0, 0, 0, 0.15);
    /* Syntax — GitHub Light palette */
    --cb-s-comment:    #6e7781;
    --cb-s-keyword:    #cf222e;
    --cb-s-string:     #0a3069;
    --cb-s-function:   #8250df;
    --cb-s-number:     #0550ae;
    --cb-s-class:      #953800;
    --cb-s-operator:   #0550ae;
    --cb-s-punctuation:#24292f;
    --cb-s-inserted:   #116329;
    --cb-s-deleted:    #82071e;

    /* — Transitions — */
    --transition-fast:   0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* — Layout — */
    --navbar-height:  72px;
    --sidebar-width:  280px;
    --content-max:    1400px;
}

/* ==========================================================================
   2. DARK THEME OVERRIDES
   ========================================================================== */
[data-theme="dark"] {
    --bg-obsidian:    #0b0f19;
    --bg-surface:     #111827;
    --bg-card:        rgba(17, 24, 39, 0.75);
    --glass-bg:       rgba(15, 23, 42, 0.85);
    --glass-border:   rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(6, 182, 212, 0.4);

    --surface-primary:   var(--bg-surface);
    --surface-secondary: #0b0f19;
    --border-subtle:     rgba(255, 255, 255, 0.1);
    --border-strong:     rgba(255, 255, 255, 0.08);

    --accent-cyan:          #06B6D4;
    --accent-emerald:       #10B981;
    --accent-violet:        #8B5CF6;
    --accent-rose:          #F43F5E;
    --accent-amber:         #F59E0B;

    --text-main:   #F8FAFC;
    --text-muted:  #94A3B8;
    --text-dim:    #64748B;
    --text-on-accent: #0F172A;

    --code-bg:       #090e17;
    --code-header:   #131d2e;
    --table-header:  #162032;
    --table-row-even: rgba(255, 255, 255, 0.02);
    --table-row-hover: rgba(6, 182, 212, 0.06);

    /* — Code Block Theme (dark) — */
    --cb-bg:           #0d1117;          /* GitHub Dark body */
    --cb-header-bg:    #161b22;          /* GitHub Dark header */
    --cb-border:       rgba(255, 255, 255, 0.06);
    --cb-header-sep:   rgba(255, 255, 255, 0.07);
    --cb-gutter:       rgba(6, 182, 212, 0.25);
    --cb-text:         #c9d1d9;          /* GitHub Dark base text */
    --cb-dot-ring:     rgba(255,255,255,0.15);
    --cb-badge-color:  rgba(255, 255, 255, 0.35);
    --cb-copy-bg:      rgba(255, 255, 255, 0.06);
    --cb-copy-border:  rgba(255, 255, 255, 0.1);
    --cb-copy-color:   rgba(255, 255, 255, 0.45);
    --cb-scrollbar:    rgba(255, 255, 255, 0.12);
    /* Syntax — GitHub Dark palette */
    --cb-s-comment:    #8b949e;
    --cb-s-keyword:    #ff7b72;
    --cb-s-string:     #a5d6ff;
    --cb-s-function:   #d2a8ff;
    --cb-s-number:     #79c0ff;
    --cb-s-class:      #ffa657;
    --cb-s-operator:   #79c0ff;
    --cb-s-punctuation:#c9d1d9;
    --cb-s-inserted:   #3fb950;
    --cb-s-deleted:    #ffa198;

    --shadow-level1: rgba(0, 0, 0, 0.3) 0px 4px 6px -1px;
    --shadow-sm:     0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-md:     0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg:     0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   3. ACCESSIBILITY — prefers-reduced-motion
   ========================================================================== */
@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;
    }
}

/* ==========================================================================
   4. BASE RESET & GLOBAL
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--navbar-height) + 24px);
    font-size: 16px;
    width: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-obsidian);
    color: var(--text-main);
    line-height: var(--lh-body);
    width: 100%;
    overflow-x: hidden;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-obsidian); }
::-webkit-scrollbar-thumb { background: var(--text-dim); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-cyan); }

/* Global Focus Ring (DESIGN.md §9, point 7) */
:focus-visible {
    outline: 2px solid var(--color-cyan-600);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
    border-radius: 4px;
}

/* ==========================================================================
   5. SCROLL PROGRESS BAR (Premium Enhancement)
   ========================================================================== */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--color-cyan-600), var(--color-emerald-500));
    z-index: 2000;
    transition: width 0.1s linear;
    border-radius: 0 2px 2px 0;
}

/* ==========================================================================
   6. LAYOUT & GRID
   ========================================================================== */
.app-container {
    display: flex;
    min-height: 100vh;
    padding-top: var(--navbar-height);
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 40px 6% 80px 6%;
    max-width: var(--content-max);
}

/* ==========================================================================
   7. NAVBAR
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 4%;
    z-index: 1000;
    transition: background var(--transition-smooth), border-color var(--transition-smooth);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 700;
    font-size: 1.25rem;
    font-family: var(--font-sans);
    line-height: 1.6;
    letter-spacing: -0.01em;
}

.brand-logo {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px var(--accent-cyan-glow);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
    color: white;
    font-size: 1.35rem;
    flex-shrink: 0;
    overflow: hidden;
}

.brand-logo-img {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 0 14px var(--accent-cyan-glow);
    transition: transform var(--transition-smooth);
}

.nav-brand:hover .brand-logo-img,
.nav-brand:hover .brand-logo {
    transform: scale(1.08) rotate(4deg);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

/* Hero logo styling */
.hero-logo-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    position: relative;
}

.hero-logo-img {
    width: 110px;
    height: 110px;
    border-radius: 24px;
    object-fit: cover;
    box-shadow:
        0 0 35px var(--accent-cyan-glow),
        0 0 70px rgba(16, 185, 129, 0.25);
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.hero-logo-img:hover {
    transform: scale(1.05) translateY(-4px);
    box-shadow:
        0 0 45px var(--accent-cyan-glow),
        0 0 90px rgba(16, 185, 129, 0.4);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* — Icon Button (DESIGN.md §4 — Icon Button) — */
.btn-icon {
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-main);
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 13.3333px;
    font-family: var(--font-system);
    font-weight: 400;
}

.btn-icon:hover {
    background: var(--color-slate-50);
    border-color: rgba(0, 0, 0, 0.12);
    color: var(--accent-cyan);
}

/* — Nav Link Buttons (base) — */
.nav-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: var(--fs-btn-alt);
    font-weight: 600;
    line-height: 22.4px;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    height: 40px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

/* Cyan CTA (Primary) — DESIGN.md §4 Primary Button */
.btn-analytics {
    background-color: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.2);
    color: var(--color-cyan-600);
}
.btn-analytics:hover {
    background-color: rgba(6, 182, 212, 0.15);
    border-color: rgba(6, 182, 212, 0.3);
}
.btn-analytics:active {
    background-color: rgba(6, 182, 212, 0.2);
    box-shadow: var(--shadow-level3);
}

/* Emerald Success — DESIGN.md §4 Secondary Button */
.btn-pypi {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
    color: var(--color-emerald-600);
}
.btn-pypi:hover {
    background-color: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.3);
    box-shadow: var(--shadow-level2);
}

/* Ghost White — DESIGN.md §4 Tertiary Button */
.btn-github {
    background-color: var(--color-white);
    border-color: rgba(0, 0, 0, 0.08);
    color: var(--color-slate-900);
}
.btn-github:hover {
    background-color: var(--color-slate-50);
    border-color: rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .btn-github {
    background-color: var(--bg-surface);
    color: var(--text-main);
    border-color: var(--glass-border);
}

/* Violet Accent — Author Portfolio Button */
.btn-author {
    background-color: rgba(124, 58, 237, 0.1);
    border-color: rgba(124, 58, 237, 0.2);
    color: var(--accent-violet);
}
.btn-author:hover {
    background-color: rgba(124, 58, 237, 0.18);
    border-color: rgba(124, 58, 237, 0.35);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.2);
}

[data-theme="dark"] .btn-github:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

/* Mobile menu toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}

/* ==========================================================================
   8. SIDEBAR NAVIGATION (DESIGN.md §4 — Navigation)
   ========================================================================== */
.sidebar {
    position: fixed;
    top: var(--navbar-height);
    bottom: 0;
    left: 0;
    width: var(--sidebar-width);
    background: var(--surface-secondary);
    border-right: 1px solid var(--glass-border);
    padding: 32px 0;
    overflow-y: auto;
    z-index: 900;
    transition: transform var(--transition-smooth);
    /* DESIGN.md sidebar: bg #F8FAFC, padding 24px 16px, width 280px */
}

.sidebar-section { margin-bottom: 32px; }

.sidebar-title {
    padding: 0 24px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 12px;
}

.sidebar-nav { list-style: none; }

/* Inactive nav link */
.sidebar-link {
    display: flex;
    align-items: center;
    padding: 8px 12px 8px 24px;
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: var(--fs-list);
    font-weight: 400;
    line-height: 25.6px;
    border-left: 4px solid transparent;
    border-radius: 0px 4px 4px 0px;
    transition: all var(--transition-fast);
}

.sidebar-link:hover {
    color: var(--text-main);
    background: rgba(0, 0, 0, 0.04);
}

/* Active nav link — DESIGN.md exact spec */
.sidebar-link.active {
    background-color: rgba(6, 182, 212, 0.1);
    border-left: 4px solid var(--color-cyan-600);
    color: var(--color-cyan-600);
    font-weight: 500;
}

/* Nested sub-links */
.sidebar-link.sub {
    padding-left: 40px;
    font-size: var(--fs-small);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 800;
}

/* ==========================================================================
   9. TYPOGRAPHY (DESIGN.md §3 — Full Scale)
   ========================================================================== */
h1, h2, h3, h4 {
    font-family: var(--font-sans);
    color: var(--text-main);
    margin-bottom: 1rem;
    letter-spacing: 0;
}

/* H1 — 64px, weight 800, lh 1.15 */
h1 {
    font-size: var(--fs-display);
    font-weight: 800;
    line-height: var(--lh-display);
}

/* H2 — 32px, weight 700, lh 1.6 */
h2 {
    font-size: var(--fs-h2);
    font-weight: 700;
    line-height: var(--lh-h2);
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
    margin-top: 3rem;
}

/* H3 — 19.2px, weight 700, lh 1.6 */
h3 {
    font-size: var(--fs-h3);
    font-weight: 700;
    line-height: 1.6;
}

/* Body — 21.6px, weight 400, lh 1.6 */
p {
    font-family: var(--font-sans);
    color: var(--text-muted);
    font-size: var(--fs-body);
    font-weight: 400;
    line-height: var(--lh-body);
    margin-bottom: 1.5rem;
    max-width: 80ch;
}

/* Inline code */
code:not(pre code):not(.install-cmd):not(.terminal-body code) {
    font-family: var(--font-mono);
    font-size: var(--fs-code-inline);
    line-height: 23.616px;
    font-weight: 400;
    background: var(--code-bg);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    padding: 2px 6px;
    color: var(--text-main);
}

/* Code inside pre — strip all inline code borders, backgrounds, radii, and padding */
pre code,
pre code.hljs,
.code-block-wrapper pre code {
    background: transparent !important;
    background-color: transparent !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
    box-shadow: none !important;
    outline: none !important;
    font-size: inherit !important;
    color: inherit !important;
    line-height: inherit !important;
}

/* Links — Primary (DESIGN.md §4 Text Link) */
a {
    color: var(--accent-cyan);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: var(--fs-btn-alt);
    font-weight: 600;
    line-height: 22.4px;
    border-bottom: 1px solid transparent;
    transition: all 150ms ease-in-out;
}
a:hover {
    border-bottom-color: var(--color-cyan-600);
    color: #006699;
}

/* Override: Nav links and structural links don't get underline treatment */
.nav-brand, .nav-link-btn, .sidebar-link, .stat-card, .feature-card,
.btn-icon, .install-tab, .btn-copy {
    border-bottom: none;
    font-size: inherit;
    font-weight: inherit;
}

/* Gradient Text */
.gradient-text {
    background: var(--hero-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* ==========================================================================
   10. BADGES & PILLS (DESIGN.md §4 — Badges)
   ========================================================================== */
.badge-version {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 16px;
    color: var(--accent-cyan);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 18px;
    margin-bottom: 24px;
}

/* Success Badge */
.badge-success {
    display: inline-flex;
    align-items: center;
    background-color: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 16px;
    padding: 4px 12px;
    color: var(--color-emerald-600);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 18px;
}

/* Warning Badge */
.badge-warning {
    display: inline-flex;
    align-items: center;
    background-color: rgba(217, 119, 6, 0.15);
    border: 1px solid rgba(217, 119, 6, 0.3);
    border-radius: 16px;
    padding: 4px 12px;
    color: rgb(180, 83, 9);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 18px;
}

/* Error Badge */
.badge-error {
    display: inline-flex;
    align-items: center;
    background-color: rgba(225, 29, 72, 0.15);
    border: 1px solid rgba(225, 29, 72, 0.3);
    border-radius: 16px;
    padding: 4px 12px;
    color: rgb(190, 24, 93);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 18px;
}

/* ==========================================================================
   11. HERO SECTION
   ========================================================================== */
.hero {
    text-align: center;
    padding: 60px 0;
}

.hero-title {
    margin-bottom: 24px;
}

.hero-subtitle {
    margin: 0 auto 40px auto;
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 800px;
}

/* Stats Row */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 48px;
}

/* Stat Card — DESIGN.md Elevated Card */
.stat-card {
    background-color: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: var(--shadow-level1);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(6, 182, 212, 0.2);
}

[data-theme="dark"] .stat-card {
    background-color: var(--bg-card);
}

.stat-val {
    font-family: var(--font-sans);
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 4px;
    line-height: 1.2;
    /* Count-up animation target */
    display: block;
}

.stat-label {
    font-family: var(--font-sans);
    font-size: var(--fs-small);
    color: var(--text-dim);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* ==========================================================================
   12. INSTALLATION HUB
   ========================================================================== */
.install-hub {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.install-tab-bar {
    display: flex;
    background: var(--bg-obsidian);
    border-bottom: 1px solid var(--glass-border);
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}
.install-tab-bar::-webkit-scrollbar { display: none; }

.install-tab {
    flex: 1;
    min-width: max-content;
    padding: 14px 18px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: var(--fs-btn-alt);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all var(--transition-fast);
    min-height: 44px; /* Touch target minimum */
    white-space: nowrap;
}

.install-tab:hover {
    color: var(--text-main);
    background: var(--table-row-hover);
}

.install-tab.active {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
    background: var(--bg-surface);
}

.install-panel { padding: 24px; }

.install-panel-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.install-panel-top-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.terminal-dots { display: flex; gap: 6px; }

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red    { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green  { background: #27c93f; }

.terminal-label {
    font-family: var(--font-mono);
    font-size: var(--fs-small);
    color: var(--text-dim);
}

.terminal-copy-btn {
    position: static !important;
    transform: none !important;
    flex-shrink: 0;
}

.terminal-body {
    background: var(--code-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 18px 20px;
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    overflow-x: auto;
}

.terminal-prompt {
    color: var(--accent-violet);
    font-weight: 600;
    font-family: var(--font-mono);
    white-space: nowrap;
    flex-shrink: 0;
    user-select: none;
    line-height: 1.6;
}

.install-cmd,
.terminal-body code {
    color: var(--text-main);
    font-family: var(--font-mono);
    line-height: 1.6;
    background: transparent !important;
    background-color: transparent !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
    box-shadow: none !important;
    outline: none !important;
    word-break: break-word;
    flex: 1;
    min-width: 0;
}

.install-hint {
    margin-top: 16px;
    font-size: var(--fs-small);
    color: var(--text-dim);
    margin-bottom: 0;
    max-width: none;
}

/* Platform Card (DESIGN.md §4) */
.platform-card {
    background: var(--platform-gradient);
    border: none;
    border-radius: 12px;
    padding: 24px;
    color: var(--color-white);
    font-family: var(--font-sans);
    font-size: var(--fs-list);
    font-weight: 600;
    line-height: 25.6px;
    box-shadow: rgba(0, 0, 0, 0.1) 0px 8px 16px 0px;
}

/* Copy Button */
.btn-copy {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 400;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-copy:hover {
    color: var(--text-main);
    background: var(--table-row-hover);
    border-color: var(--text-main);
}

/* ── highlight.js base reset ────────────────────────────────────────────── */
/* Prevent hljs from adding its own background/padding to the <code> element */
code.hljs {
    background: none !important;
    background-color: transparent !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
    box-shadow: none !important;
    color: inherit !important;
    display: block;
    overflow-x: auto;
}

/* Strip backgrounds off EVERY span hljs injects */
code.hljs span,
.code-block-wrapper code.hljs span {
    background:            transparent !important;
    background-color:      transparent !important;
    background-image:      none !important;
    text-shadow:           none !important;
    box-shadow:            none !important;
    padding:               0 !important;
    border:                none !important;
    outline:               none !important;
}

/* ── Outer wrapper ──────────────────────────────────────────────────────── */
.code-block-wrapper {
    position: relative;
    margin-bottom: 24px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--cb-border);
    box-shadow:
        0 2px 4px rgba(0,0,0,0.06),
        0 8px 24px rgba(0,0,0,0.08),
        0 0 0 1px rgba(0,0,0,0.03) inset;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.code-block-wrapper:hover {
    border-color: rgba(6, 182, 212, 0.25);
    box-shadow:
        0 2px 4px rgba(0,0,0,0.08),
        0 12px 28px rgba(0,0,0,0.12);
}

[data-theme="dark"] .code-block-wrapper {
    box-shadow:
        0 4px 6px rgba(0,0,0,0.2),
        0 12px 28px rgba(0,0,0,0.35),
        0 0 0 1px rgba(255,255,255,0.04) inset;
}

/* ── Header bar — adapts to theme ─────────────────────────────────────── */
.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--cb-header-bg);
    border-bottom: 1px solid var(--cb-header-sep);
    user-select: none;
    transition: background var(--transition-smooth);
}

.code-block-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ── macOS traffic lights ──────────────────────────────────────────────── */
.code-dots {
    display: flex;
    gap: 6px;
    align-items: center;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: filter var(--transition-fast);
}

.code-dot-red    { background: #ff5f57; box-shadow: 0 0 0 1px rgba(255,95,87,0.3); }
.code-dot-yellow { background: #febc2e; box-shadow: 0 0 0 1px rgba(254,188,46,0.3); }
.code-dot-green  { background: #28c840; box-shadow: 0 0 0 1px rgba(40,200,64,0.3); }

.code-block-wrapper:hover .code-dot-red    { filter: brightness(1.1) saturate(1.2); }
.code-block-wrapper:hover .code-dot-yellow { filter: brightness(1.1) saturate(1.2); }
.code-block-wrapper:hover .code-dot-green  { filter: brightness(1.1) saturate(1.2); }

/* ── Language badge ────────────────────────────────────────────────────── */
.code-lang-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--cb-badge-color);
    line-height: 1;
    transition: color var(--transition-smooth);
}

/* ── Copy button in header ─────────────────────────────────────────────── */
.code-copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    background: var(--cb-copy-bg);
    border: 1px solid var(--cb-copy-border);
    border-radius: 6px;
    color: var(--cb-copy-color);
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1;
    letter-spacing: 0.02em;
}

.code-copy-btn:hover {
    background: rgba(6, 182, 212, 0.12);
    border-color: rgba(6, 182, 212, 0.35);
    color: var(--color-cyan-500);
}

.code-copy-btn.copied {
    background: rgba(16, 185, 129, 0.12);
    border-color: rgba(16, 185, 129, 0.35);
    color: var(--color-emerald-500);
}

/* ── Code body (pre) ───────────────────────────────────────────────────── */
.code-block-wrapper pre {
    margin: 0;
    border: none;
    border-radius: 0;
    padding: 20px 24px;
    background: var(--cb-bg);
    box-shadow: none;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.75;
    color: var(--cb-text);
    overflow-x: auto;
    tab-size: 4;
    border-left: 3px solid var(--cb-gutter);
    transition:
        background-color var(--transition-smooth),
        color            var(--transition-smooth),
        border-color     var(--transition-smooth);
}

/* ── Scrollbar inside code body ────────────────────────────────────────── */
.code-block-wrapper pre::-webkit-scrollbar { height: 5px; }
.code-block-wrapper pre::-webkit-scrollbar-track { background: var(--cb-bg); }
.code-block-wrapper pre::-webkit-scrollbar-thumb {
    background: var(--cb-scrollbar);
    border-radius: 3px;
}
.code-block-wrapper pre::-webkit-scrollbar-thumb:hover {
    background: rgba(6, 182, 212, 0.45);
}

/* ── highlight.js syntax token colours — theme-aware ─────────────────── */
/* Keywords: import, def, return, for, if, class, as, with, from, etc. */
.code-block-wrapper .hljs-keyword,
.code-block-wrapper .hljs-operator.word {
    color: var(--cb-s-keyword);
    font-weight: 500;
}

/* Strings, template literals, attribute values */
.code-block-wrapper .hljs-string,
.code-block-wrapper .hljs-template-variable,
.code-block-wrapper .hljs-attr,
.code-block-wrapper .hljs-attribute {
    color: var(--cb-s-string);
}

/* Comments */
.code-block-wrapper .hljs-comment,
.code-block-wrapper .hljs-quote {
    color: var(--cb-s-comment);
    font-style: italic;
}

/* Built-in functions, types (print, len, str, int, etc.) */
.code-block-wrapper .hljs-built_in,
.code-block-wrapper .hljs-type {
    color: var(--cb-s-class);
}

/* Numbers, booleans, None, True, False */
.code-block-wrapper .hljs-number,
.code-block-wrapper .hljs-literal {
    color: var(--cb-s-number);
}

/* Function/class names */
.code-block-wrapper .hljs-title,
.code-block-wrapper .hljs-title.class_,
.code-block-wrapper .hljs-title.function_,
.code-block-wrapper .hljs-name {
    color: var(--cb-s-function);
    font-weight: 600;
}

/* Variables, parameters, self */
.code-block-wrapper .hljs-variable,
.code-block-wrapper .hljs-params {
    color: var(--cb-text);
}

/* Operators (+, -, =, ==, etc.) */
.code-block-wrapper .hljs-operator {
    color: var(--cb-s-operator);
}

/* Punctuation, meta, symbol */
.code-block-wrapper .hljs-punctuation,
.code-block-wrapper .hljs-meta,
.code-block-wrapper .hljs-symbol {
    color: var(--cb-s-punctuation);
}

/* Diff: additions and deletions */
.code-block-wrapper .hljs-addition { color: var(--cb-s-inserted); }
.code-block-wrapper .hljs-deletion { color: var(--cb-s-deleted); }

/* Section titles (e.g., bash section headers) */
.code-block-wrapper .hljs-section { color: var(--cb-s-keyword); font-weight: 700; }

/* Bold / italic decorators */
.code-block-wrapper .hljs-strong { font-weight: 700; }
.code-block-wrapper .hljs-emphasis { font-style: italic; }

/* ── Fallback: standalone pre not inside wrapper ───────────────────────── */
pre:not(.code-block-wrapper pre) {
    background: var(--cb-bg);
    border: 1px solid var(--cb-border);
    border-radius: 10px;
    padding: 20px 24px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.75;
    color: var(--cb-text);
    margin-bottom: 24px;
    position: relative;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border-left: 3px solid var(--cb-gutter);
    transition: background var(--transition-smooth), color var(--transition-smooth);
}



/* ==========================================================================
   14. TABLES
   ========================================================================== */



.table-wrapper {
    overflow-x: auto;
    margin: 24px 0;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-level1);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-surface);
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

th {
    background: var(--table-header);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: var(--fs-small);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    font-family: var(--font-sans);
    color: var(--text-muted);
    font-size: var(--fs-list);
}

tr:last-child td { border-bottom: none; }

tr:nth-child(even) td { background: var(--table-row-even); }

tr:hover td {
    background: var(--table-row-hover);
    /* Premium: left accent bar on hover */
}

/* ==========================================================================
   15. ALERTS (DESIGN.md aligned)
   ========================================================================== */
.alert {
    padding: 20px 20px 20px 24px;
    border-radius: 12px;
    margin: 24px 0;
    border-left: 4px solid var(--accent-cyan);
    background-color: rgba(6, 182, 212, 0.05);
}

.alert-title {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: var(--fs-list);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-main);
}

.alert-title i { color: var(--accent-cyan); }

.alert p {
    margin-bottom: 0;
    font-size: var(--fs-list);
    color: var(--text-muted);
    max-width: none;
}

/* Alert variants */
.alert-success {
    border-left-color: var(--color-emerald-500);
    background-color: rgba(16, 185, 129, 0.05);
}
.alert-success .alert-title i { color: var(--color-emerald-500); }

.alert-warning {
    border-left-color: var(--color-amber-600);
    background-color: rgba(217, 119, 6, 0.05);
}
.alert-warning .alert-title i { color: var(--color-amber-600); }

.alert-error {
    border-left-color: var(--color-error);
    background-color: rgba(225, 29, 72, 0.05);
}
.alert-error .alert-title i { color: var(--color-error); }

/* ==========================================================================
   16. FEATURE CARDS (DESIGN.md — Standard + Elevated Cards)
   ========================================================================== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

/* Standard Card + Premium: animated gradient border on hover */
.feature-card {
    background-color: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px; /* DESIGN.md: 12px for cards */
    padding: 32px;
    box-shadow: var(--shadow-level1);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    padding: 1.5px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0), rgba(16, 185, 129, 0));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-smooth), background var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.feature-card:hover::before {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.8), rgba(16, 185, 129, 0.8));
    opacity: 1;
}

[data-theme="dark"] .feature-card {
    background-color: var(--bg-card);
    border-color: var(--glass-border);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.feature-card:hover .feature-icon {
    background: rgba(6, 182, 212, 0.15);
    transform: scale(1.08);
}

.feature-title {
    font-family: var(--font-sans);
    font-size: var(--fs-h3);
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 12px;
    line-height: 1.4;
}

/* ==========================================================================
   17. TEXT INPUT STYLES (DESIGN.md §4 — Inputs & Forms)
   ========================================================================== */
.text-input {
    background-color: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--color-slate-900);
    font-family: var(--font-system);
    font-size: 13.3333px;
    font-weight: 400;
    line-height: normal;
    height: 40px;
    width: 100%;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.text-input:focus {
    border-color: var(--color-cyan-600);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.text-input.error {
    border-color: var(--color-error);
    background-color: rgba(225, 29, 72, 0.05);
}

.form-label {
    display: block;
    color: var(--color-slate-900);
    font-family: var(--font-sans);
    font-size: var(--fs-small);
    font-weight: 400;
    line-height: 21.76px;
    margin-bottom: 6px;
}

/* ==========================================================================
   18. SYNTAX HIGHLIGHTING — Global Base Reset
   All syntax COLOURS live in section 13 (.code-block-wrapper scope only).
   This section ONLY handles the global base, and strips Prism backgrounds.
   ========================================================================== */

/* Base font/layout reset for Prism-targeted elements */
code[class*="language-"],
pre[class*="language-"] {
    text-shadow: none !important;
    font-family: var(--font-mono);
    direction: ltr;
    text-align: left;
    white-space: pre;
    word-spacing: normal;
    word-break: normal;
    tab-size: 4;
    hyphens: none;
    font-size: 0.875rem;
    line-height: 1.75;
    /* No color set here — handled by .code-block-wrapper scope */
}

/* ── GLOBAL HIGHLIGHT.JS BACKGROUND NUKE ───────────────────────────────────
   Ensures highlight.js span elements never render inline backgrounds or boxes.
   ─────────────────────────────────────────────────────────────────────────── */
code[class*="language-"] span,
pre[class*="language-"] span,
.hljs span {
    background:            transparent !important;
    background-color:      transparent !important;
    background-image:      none !important;
    text-shadow:           none !important;
    box-shadow:            none !important;
    border:                none !important;
    outline:               none !important;
    padding:               0 !important;
    border-radius:         0 !important;
    -webkit-text-fill-color: unset !important;
}


/* ==========================================================================
   19. BREADCRUMB (DESIGN.md §4)
   ========================================================================== */
.breadcrumb {
    display: flex;
    gap: 8px;
    align-items: center;
    font-family: var(--font-sans);
    font-size: var(--fs-btn-alt);
    font-weight: 400;
    color: var(--text-main);
    margin-bottom: 16px;
}

.breadcrumb-sep {
    color: var(--color-slate-600);
    margin: 0 4px;
}

/* ==========================================================================
   19.2. API FUNCTION CODE MODAL POPUP
   ========================================================================== */
.func-trigger-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    font-size: inherit;
    padding: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

.func-trigger-btn:hover code {
    color: var(--accent-cyan) !important;
    border-color: var(--accent-cyan) !important;
    box-shadow: 0 0 10px var(--accent-cyan-glow);
}

.func-trigger-btn i {
    font-size: 0.7rem;
    color: var(--accent-cyan);
    opacity: 0.6;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.func-trigger-btn:hover i {
    opacity: 1;
    transform: scale(1.2);
}

.api-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.api-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.api-modal-container {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    width: 100%;
    max-width: 650px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transform: scale(0.94);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.api-modal-overlay.active .api-modal-container {
    transform: scale(1);
}

.api-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--glass-border);
    background: var(--bg-obsidian);
}

.api-modal-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.alert.alert-info {
    border-left-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.06);
}

.alert.alert-info .alert-title {
    color: var(--accent-cyan);
}

.api-modal-title {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 2px 0 0 0;
}

.api-modal-close {
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-dim);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.api-modal-close:hover {
    color: var(--text-main);
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.1);
}

.api-modal-body {
    padding: 20px;
}

.api-modal-desc {
    font-family: var(--font-sans);
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.5;
}

@media (max-width: 640px) {
    .api-modal-overlay {
        padding: 12px;
    }
    .api-modal-container {
        max-width: 100%;
        max-height: 85vh;
        display: flex;
        flex-direction: column;
        border-radius: 12px;
    }
    .api-modal-header {
        padding: 12px 14px;
        flex-shrink: 0;
    }
    .api-modal-title {
        font-size: 0.95rem;
    }
    .api-modal-body {
        padding: 14px;
        overflow-y: auto;
    }
    .api-modal-desc {
        font-size: 0.85rem;
        margin-bottom: 12px;
    }
    .code-block-header {
        padding: 6px 10px;
    }
    .api-modal-body pre {
        margin: 0;
        max-height: 50vh;
        overflow-x: auto;
    }
    .api-modal-body pre code {
        font-size: 0.78rem !important;
        padding: 10px !important;
        white-space: pre !important;
        overflow-x: auto !important;
    }
}

/* ==========================================================================
   19.5. PAGE FOOTER NAVIGATION — Single-Line Sleek Pill Buttons
   ========================================================================== */
.page-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 36px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
    width: 100%;
}

.page-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
    box-shadow: var(--shadow-level1);
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1.2;
}

.page-nav-btn.prev {
    margin-right: auto;
}

.page-nav-btn.next {
    margin-left: auto;
}

.page-nav-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(6, 182, 212, 0.15);
}

.page-nav-btn i {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.page-nav-btn.prev:hover i {
    transform: translateX(-3px);
}

.page-nav-btn.next:hover i {
    transform: translateX(3px);
}

@media (max-width: 480px) {
    .page-nav {
        gap: 8px;
        margin-top: 24px;
        padding-top: 14px;
    }
    .page-nav-btn {
        padding: 6px 10px;
        font-size: 0.76rem;
        border-radius: 6px;
        max-width: 48%;
        overflow: hidden;
    }
    .page-nav-btn span {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .page-nav-btn i {
        font-size: 0.7rem;
    }
}

/* ==========================================================================
   20. RESPONSIVE BREAKPOINTS (DESIGN.md §8)
   ========================================================================== */

/* ==========================================================================
   20. RESPONSIVE BREAKPOINTS (DESIGN.md §8 — Comprehensive Mobile & Desktop)
   ========================================================================== */

/* --- Medium Screen / Tablet Landscape (≤ 1024px) --- */
@media (max-width: 1024px) {
    :root {
        --fs-display: 2.75rem;
        --fs-h2:      1.6rem;
        --fs-body:    1.2rem;
    }

    .main-content {
        margin-left: 0;
        padding: 32px 5% 70px 5%;
    }

    .nav-controls a.nav-link-btn { display: none; }
    .mobile-toggle { display: block; }

    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 0 0 30px rgba(0, 0, 0, 0.4);
    }
    .sidebar-overlay.active {
        display: block;
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* --- Tablet Portrait (≤ 768px) --- */
@media (max-width: 768px) {
    :root {
        --fs-display: 2.15rem;
        --fs-h2:      1.4rem;
        --fs-body:    1.1rem;
        --fs-list:    0.95rem;
    }

    .hero { padding: 32px 0 40px; }
    .hero-subtitle { font-size: 1.1rem; max-width: 100%; }

    .stats-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .install-hub { border-radius: 12px; }
    .install-panel { padding: 20px 16px; }
    .terminal-body { padding: 16px; }

    .table-wrapper { margin: 16px 0; }
    th, td { padding: 12px; font-size: 0.9rem; }
}

/* --- Mobile / Smartphone (≤ 480px) --- */
@media (max-width: 480px) {
    :root {
        --fs-display: 1.6rem;     /* ~25.6px display font */
        --fs-h2:      1.15rem;    /* ~18.4px section headings */
        --fs-body:    0.98rem;    /* 15.6px readable body */
        --fs-list:    0.88rem;
    }

    .navbar {
        padding: 0 10px;
    }

    .nav-brand span {
        font-size: 0.85rem;
        max-width: 165px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        display: inline-block;
    }

    .brand-logo-img {
        width: 30px;
        height: 30px;
    }

    .main-content {
        margin-left: 0;
        padding: 16px 12px 48px 12px;
        width: 100%;
        max-width: 100%;
    }

    .hero { padding: 16px 0 24px; }

    .hero-title {
        word-break: break-word;
        hyphens: auto;
        font-size: 1.6rem;
        line-height: 1.25;
    }

    .hero-title br { display: none; }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .stats-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .stat-card { padding: 12px 10px; }
    .stat-val { font-size: 1.35rem; }
    .stat-label { font-size: 0.7rem; }

    h2 { margin-top: 1.5rem; }

    /* CTA buttons stack full-width on phone viewports */
    .hero-cta-group {
        flex-direction: column;
        width: 100%;
        gap: 10px;
    }
    .hero-cta-group .nav-link-btn {
        width: 100%;
        justify-content: center;
    }

    .install-hub { border-radius: 10px; width: 100%; }
    .install-tab { padding: 8px 10px; font-size: 0.72rem; min-height: 40px; }
    .install-panel { padding: 12px 10px; }
    .terminal-body { padding: 10px 12px; font-size: 0.82rem; }
    .terminal-label { font-size: 0.72rem; }

    /* Code block mobile spacing optimization */
    .code-block-wrapper {
        border-radius: 8px;
        margin-bottom: 16px;
    }
    .code-block-wrapper pre {
        padding: 12px 14px;
        font-size: 0.78rem;
        line-height: 1.6;
    }
    .code-block-header {
        padding: 6px 10px;
    }
    .code-dots { gap: 4px; }
    .code-dot { width: 10px; height: 10px; }
    .code-lang-badge { font-size: 0.62rem; }
    .code-copy-btn { padding: 4px 8px; font-size: 0.65rem; }

    .feature-card { padding: 18px; }
    .feature-card::before { display: none; } /* Skip animated border on phone for performance */

    .nav-controls .btn-icon { width: 34px; height: 34px; }

    /* Table mobile scroll optimization */
    .table-wrapper {
        border-radius: 8px;
        margin: 16px 0;
        -webkit-overflow-scrolling: touch;
    }
    table {
        min-width: 480px; /* Ensures tables scroll cleanly instead of collapsing cell width */
    }
    th, td { padding: 8px 10px; font-size: 0.8rem; }
}

/* --- Large Desktop (≥ 1025px) --- */
@media (min-width: 1025px) {
    .nav-controls a.nav-link-btn { display: inline-flex; }
    .mobile-toggle { display: none; }
    .sidebar { transform: translateX(0); }
}

/* --- Ultrawide / Large Desktop (≥ 1401px) --- */
@media (min-width: 1401px) {
    .main-content {
        padding: 40px 8% 80px 8%;
        max-width: var(--content-max);
    }
}

/* ==========================================================================
   21. FINAL CASCADE-LAST — Code block token background kill switch
   Placed at the very bottom of the file so it wins the cascade against
   any Prism CDN stylesheet or late-loaded <style> injection.
   ========================================================================== */

/* This selector targets every possible syntax token span in every context */
.hljs span,
span[class*="hljs-"] {
    background:       transparent !important;
    background-color: transparent !important;
    background-image: none !important;
    box-shadow:       none !important;
    text-shadow:      none !important;
    padding:          0 !important;
    border-radius:    0 !important;
    border:           none !important;
    outline:          none !important;
}

/* Smooth theme transition on code block elements */
.code-block-wrapper,
.code-block-wrapper pre,
.code-block-wrapper .code-block-header,
.code-block-wrapper .code-lang-badge,
.code-block-wrapper .code-copy-btn {
    transition:
        background-color var(--transition-smooth),
        color            var(--transition-smooth),
        border-color     var(--transition-smooth) !important;
}