/* ============================================
   SBET Protocol Documentation — Dark Theme
   Brand: Crimson #C62828 | Dark #1a1a2e
   Fonts: DM Sans (body), Space Mono (code)
   ============================================ */

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

:root {
  --crimson-50:  #fef2f2;
  --crimson-100: #fde6e6;
  --crimson-200: #fac5c5;
  --crimson-300: #f59393;
  --crimson-400: #ef5350;
  --crimson-500: #e53935;
  --crimson-600: #C62828;
  --crimson-700: #a51d1d;
  --crimson-800: #891b1b;
  --crimson-900: #721c1c;

  --dark-50:  #e8e8f0;
  --dark-100: #c5c5d3;
  --dark-200: #9e9eb5;
  --dark-300: #7a7a96;
  --dark-400: #55557a;
  --dark-500: #3d3d5c;
  --dark-600: #2d2d48;
  --dark-700: #232340;
  --dark-800: #1a1a2e;
  --dark-900: #12121f;
  --dark-950: #0a0a14;

  --bg-primary:   var(--dark-900);
  --bg-secondary: var(--dark-800);
  --bg-card:      var(--dark-700);
  --bg-code:      var(--dark-950);
  --bg-nav:       rgba(18,18,31,0.95);

  --text-primary:   #f0f0f5;
  --text-secondary: #b0b0c5;
  --text-muted:     #8080a0;

  --accent:       var(--crimson-600);
  --accent-hover: var(--crimson-500);
  --accent-glow:  rgba(198,40,40,0.25);

  --border:       rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --nav-height: 64px;
  --sidebar-width: 260px;
  --content-max: 900px;

  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Space Mono', 'JetBrains Mono', 'Fira Code', monospace;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 24px);
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--crimson-400);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--crimson-300);
}

::selection {
  background: var(--accent-glow);
  color: var(--crimson-50);
}

img { max-width: 100%; height: auto; }

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin-top: 2em;
  margin-bottom: 0.6em;
}

h1 { font-size: 2.25rem; letter-spacing: -0.03em; }
h2 { font-size: 1.75rem; letter-spacing: -0.02em; border-bottom: 1px solid var(--border); padding-bottom: 0.4em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; color: var(--text-secondary); }

h1:first-child, h2:first-child, h3:first-child { margin-top: 0; }

p { margin-bottom: 1em; }

ul, ol {
  margin-bottom: 1em;
  padding-left: 1.5em;
}
li { margin-bottom: 0.3em; }

blockquote {
  border-left: 3px solid var(--accent);
  background: var(--bg-secondary);
  padding: 1em 1.25em;
  margin: 1.5em 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5em 0;
}

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

/* ---------- Code ---------- */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-code);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  color: var(--crimson-300);
  border: 1px solid var(--border);
}

pre {
  background: var(--bg-code) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25em 1.5em;
  overflow-x: auto;
  margin: 1.5em 0;
  line-height: 1.5;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85em;
  color: var(--text-primary);
}

/* ---------- Tables ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9em;
}

thead th {
  background: var(--bg-secondary);
  text-align: left;
  padding: 0.75em 1em;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--accent);
  white-space: nowrap;
}

tbody td {
  padding: 0.65em 1em;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

tbody tr:hover {
  background: rgba(198,40,40,0.05);
}

/* ---------- Nav ---------- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 2rem;
}

.nav-inner {
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75em;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.nav-logo img, .nav-logo svg {
  height: 32px;
  width: auto;
}

.nav-logo span {
  color: var(--crimson-400);
}

.nav-links {
  display: flex;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  display: block;
  padding: 0.5em 1.1em;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.nav-links a.active {
  color: var(--crimson-400);
}

.nav-links a.nav-external {
  color: var(--text-muted);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25em;
}

/* ---------- Layout ---------- */
.page-wrapper {
  margin-top: var(--nav-height);
  min-height: calc(100vh - var(--nav-height));
}

/* Layout with sidebar */
.layout-sidebar {
  display: flex;
  max-width: 1440px;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: var(--nav-height);
  width: var(--sidebar-width);
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  padding: 2rem 1rem 2rem 2rem;
  border-right: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.content-main {
  flex: 1;
  min-width: 0;
  padding: 2.5rem 3rem 4rem;
  max-width: var(--content-max);
}

/* Layout without sidebar (landing, wishlist) */
.layout-full {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
}

/* ---------- Sidebar TOC (tocbot) ---------- */
.toc {
  font-size: 0.85rem;
}

.toc-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1em;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-list-item {
  margin-bottom: 2px;
}

.toc-list .toc-list {
  padding-left: 0.75em;
  border-left: 1px solid var(--border);
  margin-left: 0.5em;
}

.toc-link {
  display: block;
  padding: 0.3em 0.5em;
  color: var(--text-muted);
  font-size: 0.83rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

.toc-link:hover {
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
}

.is-active-link {
  color: var(--crimson-400) !important;
  background: var(--accent-glow) !important;
  font-weight: 500;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75em;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 1.5em 0;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 0.5em;
}

.card h3 {
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 0.5em;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 0.5em;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--crimson-400), var(--crimson-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 2em;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 1em;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.7em 1.5em;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--border-hover);
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 3rem;
  padding: 2rem 0;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--crimson-400);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.25em;
}

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 0.2em 0.6em;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  white-space: nowrap;
  letter-spacing: 0.05em;
}

.badge-planned    { background: rgba(59,130,246,0.15); color: #60a5fa; }
.badge-considering{ background: rgba(168,85,247,0.15); color: #c084fc; }
.badge-progress   { background: rgba(234,179,8,0.15);  color: #facc15; }
.badge-shipped    { background: rgba(34,197,94,0.15);   color: #4ade80; }
.badge-critical   { background: rgba(239,68,68,0.15);   color: #f87171; }
.badge-high       { background: rgba(249,115,22,0.15);  color: #fb923c; }
.badge-medium     { background: rgba(234,179,8,0.15);   color: #facc15; }
.badge-low        { background: rgba(59,130,246,0.15);  color: #60a5fa; }
.badge-info       { background: rgba(156,163,175,0.15); color: #9ca3af; }
.badge-remediated { background: rgba(34,197,94,0.15);   color: #4ade80; }

/* ---------- Function Signatures (API page) ---------- */
.fn-signature {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 0.75em 1em;
  font-family: var(--font-mono);
  font-size: 0.85em;
  margin: 1em 0 0.5em;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.fn-params {
  margin: 0.5em 0 1em 1.5em;
  font-size: 0.9em;
}

.fn-params dt {
  font-family: var(--font-mono);
  color: var(--crimson-300);
  font-size: 0.9em;
}

.fn-params dd {
  color: var(--text-secondary);
  margin-bottom: 0.4em;
  margin-left: 0;
  padding-left: 1em;
}

/* ---------- Audit Finding ---------- */
.finding {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin: 1.5em 0;
  overflow: hidden;
}

.finding-header {
  display: flex;
  align-items: center;
  gap: 0.75em;
  padding: 0.75em 1.25em;
  background: var(--bg-secondary);
  cursor: pointer;
}

.finding-header h4 {
  margin: 0;
  color: var(--text-primary);
  font-size: 0.95rem;
  flex: 1;
}

.finding-body {
  padding: 1.25em;
  border-top: 1px solid var(--border);
}

.finding-meta {
  display: flex;
  gap: 1em;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1em;
  flex-wrap: wrap;
}

.finding-meta span { display: inline-flex; align-items: center; gap: 0.3em; }

/* ---------- Wishlist Feature List ---------- */
.feature-category {
  margin: 2em 0;
}

.feature-category h3 {
  display: flex;
  align-items: center;
  gap: 0.5em;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 1em;
  padding: 1em 0;
  border-bottom: 1px solid var(--border);
}

.feature-item > div:first-child {
  flex: 1;
  min-width: 0;
}

.feature-item > .badge {
  flex-shrink: 0;
  margin-top: 0.15em;
}

.feature-item:last-child { border-bottom: none; }

.feature-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25em;
}

.feature-desc {
  font-size: 0.9em;
  color: var(--text-secondary);
}

/* ---------- SVG Diagrams ---------- */
.diagram-container {
  margin: 2em 0;
  padding: 1.5em;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow-x: auto;
  text-align: center;
}

.diagram-container svg {
  max-width: 100%;
  height: auto;
}

.diagram-caption {
  text-align: center;
  font-size: 0.85em;
  color: var(--text-muted);
  margin-top: 0.75em;
  font-style: italic;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5em;
  margin-bottom: 1em;
  flex-wrap: wrap;
}

/* ---------- Section anchors ---------- */
.heading-anchor {
  color: var(--text-muted);
  opacity: 0;
  margin-left: 0.3em;
  font-weight: 400;
  transition: opacity 0.2s;
}

h2:hover .heading-anchor,
h3:hover .heading-anchor {
  opacity: 1;
}

/* ---------- Giscus ---------- */
.giscus-container {
  margin-top: 3em;
  padding-top: 2em;
  border-top: 1px solid var(--border);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .sidebar {
    display: none;
  }

  .content-main {
    padding: 2rem 1.5rem 3rem;
    max-width: 100%;
  }

  .hero h1 { font-size: 2.25rem; }
}

@media (max-width: 768px) {
  .site-nav { padding: 0 1rem; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-nav);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 0.5em 1em;
  }

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

  .hero { padding: 3rem 1rem 2.5rem; }
  .hero h1 { font-size: 1.75rem; }
  .hero .subtitle { font-size: 1rem; }

  .stats-bar { gap: 1.5rem; }
  .stat-value { font-size: 1.5rem; }

  .card-grid { grid-template-columns: 1fr; }

  .layout-full { padding: 1.5rem 1rem 3rem; }

  table {
    display: block;
    overflow-x: auto;
  }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.5rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .stats-bar { flex-direction: column; gap: 1em; }
}

/* ---------- Accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

:focus-visible {
  outline: 2px solid var(--crimson-400);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent);
  color: white;
  padding: 0.5em 1em;
  z-index: 9999;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* ---------- Utility ---------- */
.text-muted { color: var(--text-muted); }
.text-crimson { color: var(--crimson-400); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 2em; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }