/* ══════════════════════════════════════════════════════════════
   infraudit docs — dark/light theme
   ══════════════════════════════════════════════════════════════ */

/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;600;700;800&display=swap');

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

:root {
    /* surfaces */
    --bg:          #09090b;
    --bg-card:     #131318;
    --bg-input:    #1c1c24;
    --bg-hover:    #1a1a25;
    /* borders */
    --border:      rgba(255,255,255,.08);
    --border-focus:rgba(255,255,255,.16);
    /* text */
    --text:        #f4f4f5;
    --text-2:      #d4d4d8;
    --text-3:      #a1a1aa;
    --text-4:      #71717a;
    /* accent */
    --blue:        #818cf8;
    --blue-bg:     rgba(129,140,248,.12);
    --green:       #4ade80;
    --green-bg:    rgba(74,222,128,.1);
    --red:         #fb7185;
    --red-bg:      rgba(251,113,133,.12);
    --amber:       #fbbf24;
    --amber-bg:    rgba(251,191,36,.12);
    --yellow:      #fde68a;
    --purple:      #c084fc;
    --cyan:        #22d3ee;
    --teal:        #2dd4bf;
    /* theme-specific */
    --sidebar-bg:      rgba(9,9,11,.85);
    --pre-bg:          rgba(0,0,0,.4);
    --code-bg:         rgba(255,255,255,.06);
    --code-border:     rgba(255,255,255,.08);
    --card-bg:         rgba(255,255,255,.03);
    --card-hover-bg:   rgba(255,255,255,.05);
    --card-hover-shadow: 0 16px 40px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.06);
    --th-bg:           rgba(255,255,255,.04);
    --td-bg:           rgba(255,255,255,.02);
    --td-hover-bg:     rgba(255,255,255,.04);
    --btn-secondary-bg:       rgba(255,255,255,.06);
    --btn-secondary-border:   rgba(255,255,255,.12);
    --btn-secondary-hover-bg: rgba(255,255,255,.1);
    --btn-secondary-hover-border: rgba(255,255,255,.2);
    --github-btn-bg:       rgba(255,255,255,.06);
    --github-btn-border:   rgba(255,255,255,.1);
    --github-btn-hover-bg: rgba(255,255,255,.1);
    --risk-box-bg:     rgba(255,255,255,.02);
    --backtop-bg:      rgba(19,19,24,.9);
    --backtop-border:  rgba(255,255,255,.1);
    --selection-bg:    rgba(129,140,248,.35);
    --nav-hover-bg:    rgba(255,255,255,.03);
    --nav-active-bg:   rgba(129,140,248,.1);
    --badge-info-bg:   rgba(161,161,170,.1);
    --badge-medium-bg: rgba(253,224,71,.1);
    --phase-planned-bg:rgba(107,114,128,.15);
    /* layout */
    --sidebar-w:   270px;
    --content-w:   840px;
    --r:           8px;
    --r-lg:        12px;
    /* fonts */
    --sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --mono:  'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', monospace;
}

/* ── Light theme ── */
[data-theme="light"] {
    --bg:          #f8f9fb;
    --bg-card:     #ffffff;
    --bg-input:    #f0f1f3;
    --bg-hover:    #eef0f4;
    --border:      rgba(0,0,0,.1);
    --border-focus:rgba(0,0,0,.18);
    --text:        #18181b;
    --text-2:      #3f3f46;
    --text-3:      #71717a;
    --text-4:      #a1a1aa;
    --blue:        #6366f1;
    --blue-bg:     rgba(99,102,241,.1);
    --green:       #16a34a;
    --green-bg:    rgba(22,163,74,.08);
    --red:         #e11d48;
    --red-bg:      rgba(225,29,72,.08);
    --amber:       #d97706;
    --amber-bg:    rgba(217,119,6,.08);
    --yellow:      #a16207;
    --purple:      #9333ea;
    --cyan:        #0891b2;
    --teal:        #0d9488;
    --sidebar-bg:      rgba(255,255,255,.9);
    --pre-bg:          #f4f4f5;
    --code-bg:         rgba(0,0,0,.05);
    --code-border:     rgba(0,0,0,.08);
    --card-bg:         #ffffff;
    --card-hover-bg:   #ffffff;
    --card-hover-shadow: 0 16px 40px rgba(0,0,0,.08), 0 0 0 1px rgba(0,0,0,.06);
    --th-bg:           rgba(0,0,0,.03);
    --td-bg:           #ffffff;
    --td-hover-bg:     rgba(0,0,0,.02);
    --btn-secondary-bg:       rgba(0,0,0,.04);
    --btn-secondary-border:   rgba(0,0,0,.12);
    --btn-secondary-hover-bg: rgba(0,0,0,.07);
    --btn-secondary-hover-border: rgba(0,0,0,.2);
    --github-btn-bg:       rgba(0,0,0,.04);
    --github-btn-border:   rgba(0,0,0,.1);
    --github-btn-hover-bg: rgba(0,0,0,.08);
    --risk-box-bg:     rgba(0,0,0,.02);
    --backtop-bg:      rgba(255,255,255,.9);
    --backtop-border:  rgba(0,0,0,.1);
    --selection-bg:    rgba(99,102,241,.25);
    --nav-hover-bg:    rgba(0,0,0,.03);
    --nav-active-bg:   rgba(99,102,241,.08);
    --badge-info-bg:   rgba(113,113,122,.1);
    --badge-medium-bg: rgba(161,98,7,.1);
    --phase-planned-bg:rgba(113,113,122,.1);
}

html { font-size: 16px; scroll-behavior: smooth; color-scheme: dark; }
[data-theme="light"] { color-scheme: light; }

body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text-2);
    line-height: 1.75;
    display: flex;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection { background: var(--selection-bg); }

a { color: var(--blue); text-decoration: none; transition: color .2s; }
a:hover { color: #a5b4fc; text-decoration: underline; }

/* ══════════════════════════════════════════
   Scroll progress bar
   ══════════════════════════════════════════ */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    background: linear-gradient(90deg, #4ade80, #818cf8, #c084fc, #f472b6);
    z-index: 200;
    transition: width .1s linear;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 20px rgba(129,140,248,.4);
}

/* ══════════════════════════════════════════
   Mobile hamburger
   ══════════════════════════════════════════ */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: .5rem;
    position: relative;
    width: 32px;
    height: 32px;
}

.mobile-toggle span,
.mobile-toggle span::before,
.mobile-toggle span::after {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-3);
    border-radius: 2px;
    transition: all .25s ease;
    position: absolute;
    left: 6px;
}

.mobile-toggle span { top: 15px; }
.mobile-toggle span::before { content: ''; top: -6px; }
.mobile-toggle span::after { content: ''; top: 6px; }

.mobile-toggle.active span { background: transparent; }
.mobile-toggle.active span::before { top: 0; transform: rotate(45deg); background: var(--text-3); }
.mobile-toggle.active span::after { top: 0; transform: rotate(-45deg); background: var(--text-3); }

/* ══════════════════════════════════════════
   Sidebar
   ══════════════════════════════════════════ */
.sidebar {
    width: var(--sidebar-w);
    background: var(--sidebar-bg);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border-right: 1px solid var(--border);
    position: fixed; top: 0; left: 0;
    height: 100vh;
    display: flex; flex-direction: column;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 2rem 1.5rem 1.5rem;
    display: flex; align-items: center; gap: .6rem;
}

.sidebar-header h1 {
    font-family: var(--mono);
    font-size: 1.25rem;
    color: var(--green);
    font-weight: 700;
    letter-spacing: -.03em;
}

.version {
    font-family: var(--mono);
    font-size: .65rem;
    color: var(--green);
    background: rgba(74,222,128,.1);
    padding: .2em .55em;
    border-radius: 4px;
    border: 1px solid rgba(74,222,128,.2);
}

.nav-links {
    list-style: none;
    padding: .5rem 0;
    flex: 1;
}

.nav-links li a {
    display: flex; align-items: center; gap: .6rem;
    padding: .65rem 1.5rem;
    color: var(--text-4);
    font-size: .87rem;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all .15s ease;
}

.nav-links li a:hover {
    color: var(--text-2);
    background: var(--nav-hover-bg);
    border-left-color: var(--border-focus);
    text-decoration: none;
}

.nav-links li a.active {
    color: var(--blue);
    background: var(--nav-active-bg);
    border-left-color: var(--blue);
    font-weight: 600;
    text-decoration: none;
}

.sidebar-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: .6rem;
}

.sidebar-footer a {
    font-size: .8rem;
    color: var(--text-4);
    transition: color .15s;
}

.sidebar-footer a:hover {
    color: var(--text-2);
}

.github-btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    background: var(--github-btn-bg);
    border: 1px solid var(--github-btn-border);
    border-radius: 6px;
    padding: .4rem .75rem;
    font-size: .78rem;
    font-weight: 500;
    color: var(--text-3) !important;
    transition: all .2s;
    text-decoration: none !important;
    width: fit-content;
}

.github-btn:hover {
    background: var(--github-btn-hover-bg);
    border-color: var(--border-focus);
    color: var(--text) !important;
    box-shadow: 0 2px 12px rgba(0,0,0,.1);
}

.github-btn svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* ══════════════════════════════════════════
   Content area
   ══════════════════════════════════════════ */
.content {
    margin-left: var(--sidebar-w);
    padding: 3rem 4rem 4rem;
    max-width: calc(var(--content-w) + 8rem);
    width: 100%;
    animation: fadeIn .4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Headings ── */
.content > h1 {
    font-size: 2.1rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -.04em;
    line-height: 1.2;
    margin-bottom: .4rem;
}

.content > h1 + p {
    font-size: 1.05rem;
    color: var(--text-3);
    margin-bottom: 2rem;
    line-height: 1.65;
}

.content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    margin-top: 3rem;
    margin-bottom: 1rem;
    padding-bottom: .55rem;
    border-bottom: 1px solid var(--border);
    border-image: linear-gradient(90deg, rgba(129,140,248,.3), transparent) 1;
    letter-spacing: -.025em;
}

.content h2:first-of-type { margin-top: 1.5rem; }

.content h3 {
    font-size: 1.08rem;
    font-weight: 650;
    color: var(--text);
    margin-top: 2rem;
    margin-bottom: .6rem;
}

.content h4 {
    font-size: .95rem;
    font-weight: 600;
    color: var(--text);
    margin-top: .5rem;
    margin-bottom: .3rem;
}

.content p {
    margin-bottom: .9rem;
    color: var(--text-2);
}

.content > p { max-width: 680px; }

.content ul, .content ol { margin-bottom: 1rem; padding-left: 1.3rem; }
.content li { color: var(--text-2); margin-bottom: .3rem; font-size: .93rem; }

/* ══════════════════════════════════════════
   Hero — index.html
   ══════════════════════════════════════════ */
.hero {
    margin-bottom: 2.5rem;
    padding: 3rem 2.5rem 3rem;
    border-radius: var(--r-lg);
    background:
        radial-gradient(ellipse 70% 60% at 0% 100%, var(--green-bg) 0%, transparent 55%),
        radial-gradient(ellipse 60% 70% at 100% 0%, var(--blue-bg) 0%, transparent 55%),
        var(--bg-card);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -1px; left: -1px; right: -1px;
    height: 3px;
    background: linear-gradient(90deg, #4ade80, #818cf8, #c084fc, #f472b6);
    border-radius: var(--r-lg) var(--r-lg) 0 0;
}

.hero h1 {
    font-family: var(--mono);
    color: var(--green);
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -.06em;
    line-height: 1.1;
    margin-bottom: .6rem;
}

.tagline {
    font-size: 1.3rem;
    color: var(--text) !important;
    font-weight: 600;
    margin-bottom: .6rem;
}

.description {
    font-size: 1.02rem;
    max-width: 600px;
    line-height: 1.8;
    color: var(--text-3) !important;
}

.hero-actions {
    display: flex;
    gap: .75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .65rem 1.4rem;
    border-radius: var(--r);
    font-size: .9rem;
    font-weight: 600;
    text-decoration: none !important;
    transition: all .2s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, #4ade80, #22c55e);
    color: #09090b !important;
    font-weight: 700;
    border-color: rgba(74,222,128,.3);
    box-shadow: 0 2px 16px rgba(74,222,128,.25), 0 0 0 1px rgba(74,222,128,.1);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #86efac, #4ade80);
    box-shadow: 0 4px 24px rgba(74,222,128,.35), 0 0 0 1px rgba(74,222,128,.2);
    transform: translateY(-1px);
    color: #09090b !important;
}

.btn-secondary {
    background: var(--btn-secondary-bg);
    color: var(--text-2) !important;
    border-color: var(--btn-secondary-border);
}

.btn-secondary:hover {
    background: var(--btn-secondary-hover-bg);
    border-color: var(--btn-secondary-hover-border);
    color: var(--text) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0,0,0,.1);
}

/* ══════════════════════════════════════════
   Feature grid — index.html
   ══════════════════════════════════════════ */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 1.5rem;
    transition: all .25s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    opacity: 0;
    transition: opacity .25s ease;
}

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

.feature-card:hover::before {
    opacity: 1;
}

.feature-card h3 {
    color: var(--text);
    margin-top: 0;
    font-size: .97rem;
    font-weight: 650;
    margin-bottom: .4rem;
}

.feature-card p {
    font-size: .88rem;
    color: var(--text-3);
    margin-bottom: 0;
    line-height: 1.6;
}

/* Alternate card accent colors */
.feature-card:nth-child(3n+1)::before { background: linear-gradient(90deg, #4ade80, #2dd4bf); }
.feature-card:nth-child(3n+1) h3 { color: #4ade80; }
.feature-card:nth-child(3n+2)::before { background: linear-gradient(90deg, #818cf8, #22d3ee); }
.feature-card:nth-child(3n+2) h3 { color: #818cf8; }
.feature-card:nth-child(3n+3)::before { background: linear-gradient(90deg, #c084fc, #f472b6); }
.feature-card:nth-child(3n+3) h3 { color: #c084fc; }

/* ══════════════════════════════════════════
   Code blocks
   ══════════════════════════════════════════ */
pre {
    background: var(--pre-bg);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 1.2rem 1.5rem;
    overflow-x: auto;
    margin: .8rem 0 1.3rem;
    position: relative;
}

code {
    font-family: var(--mono);
    font-size: .85rem;
    line-height: 1.8;
}

.comment { color: var(--text-4); }

/* inline code */
p code, li code, td code, h3 code, h4 code {
    background: var(--code-bg);
    padding: .2em .5em;
    border-radius: 5px;
    font-size: .83em;
    color: var(--cyan);
    border: 1px solid var(--code-border);
}

h3 code, h4 code {
    color: var(--green);
    font-weight: 600;
}

/* ══════════════════════════════════════════
   Tables
   ══════════════════════════════════════════ */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: .8rem 0 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    font-size: .9rem;
}

th, td {
    text-align: left;
    padding: .75rem 1.1rem;
    border-bottom: 1px solid var(--border);
}

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

th {
    background: var(--th-bg);
    color: var(--text);
    font-weight: 650;
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .06em;
}

td {
    background: var(--td-bg);
    color: var(--text-2);
    transition: background .15s;
}

tbody tr:hover td {
    background: var(--td-hover-bg);
}

/* ══════════════════════════════════════════
   Badges
   ══════════════════════════════════════════ */
.badge {
    display: inline-block;
    padding: .2em .65em;
    border-radius: 5px;
    font-size: .73rem;
    font-weight: 700;
    font-family: var(--mono);
    letter-spacing: .03em;
    vertical-align: middle;
    white-space: nowrap;
}

.badge.critical { background: var(--red-bg);   color: var(--red);   box-shadow: 0 0 12px rgba(251,113,133,.2); }
.badge.high     { background: var(--amber-bg); color: var(--amber); box-shadow: 0 0 12px rgba(251,191,36,.15); }
.badge.medium   { background: var(--badge-medium-bg); color: var(--yellow); }
.badge.low      { background: var(--blue-bg);  color: var(--blue);  }
.badge.info     { background: var(--badge-info-bg); color: var(--text-3); }
.badge.pass     { background: var(--green-bg); color: var(--green); box-shadow: 0 0 12px rgba(74,222,128,.15); }

/* ══════════════════════════════════════════
   Check detail cards — checks.html
   ══════════════════════════════════════════ */
.check-detail {
    margin-bottom: .75rem;
    padding: 1.15rem 1.4rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    transition: border-color .15s, box-shadow .15s;
}

.check-detail:hover {
    border-color: var(--border-focus);
    box-shadow: 0 8px 24px rgba(0,0,0,.3);
}

.check-detail h4 {
    margin-top: 0;
    margin-bottom: .3rem;
    display: flex;
    align-items: center;
    gap: .6rem;
    flex-wrap: wrap;
    font-size: .95rem;
}

.check-detail h4 code {
    color: var(--green);
    background: transparent;
    border: none;
    padding: 0;
    font-size: .9rem;
    font-weight: 800;
}

.check-detail > p {
    font-size: .88rem;
    margin-bottom: .4rem;
    color: var(--text-3);
}

/* Risk callout inside check card */
.risk-box {
    border-left: 4px solid var(--border);
    border-radius: 0 var(--r) var(--r) 0;
    padding: .9rem 1.1rem;
    margin-top: .6rem;
    font-size: .87rem;
    color: var(--text-2);
    line-height: 1.7;
    background: var(--risk-box-bg);
}

.risk-box.critical { border-left-color: var(--red);   background: var(--red-bg); }
.risk-box.high     { border-left-color: var(--amber); background: var(--amber-bg); }
.risk-box.medium   { border-left-color: var(--yellow);background: var(--badge-medium-bg); }
.risk-box.low      { border-left-color: var(--blue);  background: var(--blue-bg); }

.risk-box strong {
    color: var(--text);
    font-weight: 650;
}

/* ══════════════════════════════════════════
   TOC grid — checks.html
   ══════════════════════════════════════════ */
.toc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(205px, 1fr));
    gap: .6rem;
    margin: 1rem 0 2.5rem;
}

.toc-grid a {
    display: flex;
    align-items: center;
    gap: .55rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: .65rem .9rem;
    font-size: .84rem;
    color: var(--text-3);
    transition: all .2s ease;
}

.toc-grid a:hover {
    border-color: rgba(129,140,248,.4);
    color: var(--text);
    background: rgba(129,140,248,.06);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,.3), 0 0 0 1px rgba(129,140,248,.1);
}

.toc-grid .prefix {
    font-family: var(--mono);
    font-size: .72rem;
    font-weight: 700;
    color: var(--green);
    background: rgba(74,222,128,.12);
    padding: .2em .5em;
    border-radius: 4px;
    flex-shrink: 0;
}

.toc-grid .count {
    color: var(--text-4);
    font-size: .72rem;
    margin-left: auto;
    font-family: var(--mono);
    font-weight: 600;
}

/* ══════════════════════════════════════════
   Check list (arrow-prefixed)
   ══════════════════════════════════════════ */
.check-list {
    list-style: none;
    margin: .5rem 0 1.5rem;
    padding-left: 0;
}

.check-list li {
    padding: .4rem 0 .4rem 1.6rem;
    position: relative;
    color: var(--text-2);
    font-size: .9rem;
}

.check-list li::before {
    content: '\2192';
    position: absolute;
    left: .15rem;
    color: var(--blue);
    font-weight: 600;
}

/* ══════════════════════════════════════════
   Roadmap phases
   ══════════════════════════════════════════ */
.phase { margin-bottom: 1.75rem; }

.phase-header {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: .4rem;
}

.phase-status {
    font-size: .68rem;
    padding: .18em .55em;
    border-radius: 4px;
    font-family: var(--mono);
    font-weight: 700;
    letter-spacing: .03em;
}

.phase-status.done    { background: var(--green-bg); color: var(--green); }
.phase-status.next    { background: var(--blue-bg);  color: var(--blue); }
.phase-status.planned { background: var(--phase-planned-bg); color: var(--text-4); }

/* ══════════════════════════════════════════
   Category cards
   ══════════════════════════════════════════ */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: .65rem;
    margin: 1rem 0;
}

.category-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: .9rem 1rem;
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    transition: all .2s;
}

.category-card:hover {
    border-color: var(--border-focus);
    background: var(--card-hover-bg);
}

.category-card .prefix {
    font-family: var(--mono);
    font-size: .75rem;
    font-weight: 700;
    color: var(--green);
    background: rgba(74,222,128,.12);
    padding: .2em .5em;
    border-radius: 4px;
    white-space: nowrap;
}

.category-card h4 {
    font-size: .9rem;
    margin: 0 0 .15rem;
    color: var(--text);
}

.category-card p {
    font-size: .83rem;
    margin: 0;
    color: var(--text-3);
}

/* ══════════════════════════════════════════
   Stats bar — index.html
   ══════════════════════════════════════════ */
.stats-bar {
    display: flex;
    gap: 1.5rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    align-items: baseline;
    gap: .4rem;
}

.stat-value {
    font-family: var(--mono);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--green);
}

.stat-label {
    font-size: .85rem;
    color: var(--text-4);
}

/* ══════════════════════════════════════════
   Footer
   ══════════════════════════════════════════ */
.footer {
    margin-top: 4rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-left {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: .82rem;
    color: var(--text-4);
}

.footer-left span {
    font-family: var(--mono);
    font-weight: 600;
    color: var(--green);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    font-size: .82rem;
    color: var(--text-4);
}

.footer-links a:hover {
    color: var(--text-2);
}

/* ══════════════════════════════════════════
   Misc
   ══════════════════════════════════════════ */
hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 40px;
    height: 40px;
    background: var(--backtop-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--backtop-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-3);
    font-size: 1.1rem;
    text-decoration: none !important;
    opacity: 0;
    pointer-events: none;
    transition: all .2s ease;
    z-index: 90;
    box-shadow: 0 4px 16px rgba(0,0,0,.4);
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--bg-hover);
    border-color: var(--border-focus);
    color: var(--text);
    transform: translateY(-2px);
}

/* ══════════════════════════════════════════
   Theme toggle
   ═══��══════════════════════════════════════ */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    padding: .35rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--text-3);
    transition: all .2s;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--nav-hover-bg);
    border-color: var(--border-focus);
    color: var(--text);
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun  { display: none; }

[data-theme="light"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun  { display: block; }

/* Light-mode overrides for elements with hardcoded colors */
[data-theme="light"] .scroll-progress {
    box-shadow: 0 0 12px rgba(99,102,241,.3);
}

[data-theme="light"] .feature-card:nth-child(3n+1) h3 { color: #16a34a; }
[data-theme="light"] .feature-card:nth-child(3n+2) h3 { color: #6366f1; }
[data-theme="light"] .feature-card:nth-child(3n+3) h3 { color: #9333ea; }

[data-theme="light"] .feature-card:nth-child(3n+1)::before { background: linear-gradient(90deg, #16a34a, #0d9488); }
[data-theme="light"] .feature-card:nth-child(3n+2)::before { background: linear-gradient(90deg, #6366f1, #0891b2); }
[data-theme="light"] .feature-card:nth-child(3n+3)::before { background: linear-gradient(90deg, #9333ea, #ec4899); }

[data-theme="light"] .hero::before {
    background: linear-gradient(90deg, #16a34a, #6366f1, #9333ea, #ec4899);
}

[data-theme="light"] .scroll-progress {
    background: linear-gradient(90deg, #16a34a, #6366f1, #9333ea, #ec4899);
}

[data-theme="light"] .btn-primary {
    background: linear-gradient(135deg, #16a34a, #15803d);
    color: #fff !important;
    border-color: rgba(22,163,74,.3);
    box-shadow: 0 2px 12px rgba(22,163,74,.2);
}

[data-theme="light"] .btn-primary:hover {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    box-shadow: 0 4px 20px rgba(22,163,74,.3);
    color: #fff !important;
}

[data-theme="light"] a:hover { color: #4f46e5; }

[data-theme="light"] .version {
    background: rgba(22,163,74,.08);
    border-color: rgba(22,163,74,.2);
}

[data-theme="light"] .toc-grid a:hover {
    border-color: rgba(99,102,241,.4);
    background: rgba(99,102,241,.05);
    box-shadow: 0 8px 20px rgba(0,0,0,.06), 0 0 0 1px rgba(99,102,241,.1);
}

[data-theme="light"] .content h2 {
    border-image: linear-gradient(90deg, rgba(99,102,241,.3), transparent) 1;
}

/* Keep terminal-style code blocks dark in light mode */
[data-theme="light"] pre:has(span[style]) {
    background: #0f1117;
    border-color: rgba(255,255,255,.08);
}

[data-theme="light"] pre:has(span[style]) code {
    color: #d4d4d8;
}

/* ══════════════════════════════════════════
   Responsive
   ══════════════════════════════════════════ */
@media (max-width: 900px) {
    .mobile-toggle { display: block; }

    .sidebar {
        position: fixed;
        width: 100%;
        height: auto;
        max-height: 100vh;
        flex-direction: column;
        padding: 0;
        z-index: 150;
        overflow-y: auto;
    }

    .sidebar-header {
        padding: .75rem 1rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-bottom: 1px solid var(--border);
    }

    .nav-links {
        display: none;
        flex-direction: column;
        padding: .5rem 0;
        width: 100%;
    }

    .nav-links.open { display: flex; }

    .nav-links li a {
        padding: .7rem 1.5rem;
        border-left: none;
        font-size: .9rem;
    }

    .nav-links li a:hover,
    .nav-links li a.active { border-left: none; }

    .sidebar-footer {
        display: none;
    }

    .sidebar-footer.open { display: block; }

    .content {
        margin-left: 0;
        margin-top: 54px;
        padding: 2rem 1.25rem 4rem;
    }

    body { flex-direction: column; }
    .feature-grid, .toc-grid { grid-template-columns: 1fr; }
    .hero { padding: 2rem 1.5rem; }
    .hero h1 { font-size: 2.2rem; }
    .stats-bar { gap: 1rem; }
    .footer { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .content > h1 { font-size: 1.5rem; }
    pre { padding: .9rem; }
    code { font-size: .8rem; }
    th, td { padding: .55rem .7rem; font-size: .82rem; }
    .hero h1 { font-size: 1.8rem; }
    .btn { padding: .55rem 1rem; font-size: .85rem; }
}