/* typed-lm — mdBook skin inspired by the IndieSync palette.
   Light tokens on :root/.light, dark tokens on .coal (relabelled "Dark" by custom.js). */

/* ---------- Tokens (light) ---------- */
:root,
.light {
  --brand-primary: #6d28d9;
  --brand-primary-hover: #5b21b6;
  --brand-primary-light: #ede9fe;
  --brand-accent: #3b82f6;
  --brand-accent-hover: #2563eb;
  --brand-accent-light: #dbeafe;
  --brand-success: #10b981;
  --brand-success-light: #d1fae5;
  --brand-warning: #f59e0b;
  --brand-warning-light: #fef3c7;
  --brand-danger: #ef4444;
  --brand-danger-light: #fee2e2;
  --grad-from: #7c3aed;
  --grad-to: #2563eb;

  --font-body: Inter, system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", Inter, sans-serif;

  /* mdBook variables */
  --bg: #ffffff;
  --fg: #18181b;
  --content-max-width: 820px;
  --sidebar-bg: #0b0b0f;
  --sidebar-fg: #a1a1aa;
  --sidebar-non-existant: #52525c;
  --sidebar-active: #ffffff;
  --sidebar-spacer: #2a2a33;
  --scrollbar: #d4d4d8;
  --scrollbar-track: #f7f7f8;
  --scrollbar-thumb: #d4d4d8;
  --scrollbar-track-hover: #efeff1;
  --scrollbar-thumb-hover: #a1a1aa;
  --icons: #71717a;
  --icons-hover: #18181b;
  --links: #6d28d9;
  --inline-code-color: #5b21b6;
  --theme-popup-bg: #ffffff;
  --theme-popup-border: #e4e4e7;
  --theme-hover: #f7f7f8;
  --quote-bg: #ede9fe;
  --quote-border: #7c3aed;
  --table-border-color: #e4e4e7;
  --table-header-bg: #f7f7f8;
  --table-alternate-bg: #fafafa;
  --searchbar-border-color: #e4e4e7;
  --searchbar-bg: #ffffff;
  --searchbar-fg: #18181b;
  --searchbar-shadow-color: rgba(0, 0, 0, 0.05);
  --searchresults-header-fg: #71717a;
  --searchresults-border-color: #e4e4e7;
  --searchresults-li-bg: #f7f7f8;
  --search-mark-bg: #fde68a;
}

/* ---------- Tokens (dark — class .coal) ---------- */
.coal {
  --bg: #0b0b0f;
  --fg: #f4f4f5;
  --sidebar-bg: #0b0b0f;
  --sidebar-fg: #a1a1aa;
  --sidebar-active: #ffffff;
  --sidebar-spacer: #2a2a33;
  --scrollbar: #3f3f46;
  --scrollbar-track: #151519;
  --scrollbar-thumb: #3f3f46;
  --scrollbar-track-hover: #1c1c22;
  --scrollbar-thumb-hover: #71717a;
  --icons: #a1a1aa;
  --icons-hover: #f4f4f5;
  --links: #c4b5fd;
  --inline-code-color: #c4b5fd;
  --theme-popup-bg: #1c1c22;
  --theme-popup-border: #2a2a33;
  --theme-hover: #151519;
  --quote-bg: #2e1a4d;
  --quote-border: #7c3aed;
  --table-border-color: #2a2a33;
  --table-header-bg: #151519;
  --table-alternate-bg: #151519;
  --searchbar-border-color: #2a2a33;
  --searchbar-bg: #1c1c22;
  --searchbar-fg: #f4f4f5;
  --searchresults-border-color: #2a2a33;
  --searchresults-li-bg: #151519;
  --search-mark-bg: #7c3aed;
}

/* ---------- Typography ---------- */
body {
  font-family: var(--font-body);
}

h1,
h2,
h3,
h4,
h5,
h6,
.sk-hero__title,
.sk-card__title,
.sk-cta__title,
.brand-name {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

.content h1 {
  font-weight: 700;
}

.content a {
  text-decoration: none;
}

.content a:hover {
  text-decoration: underline;
}

/* ---------- Sidebar brand ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px 6px;
  color: #fff;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  color: #fff;
  background-image: linear-gradient(135deg, var(--grad-from), var(--grad-to));
}

.brand-name {
  display: block;
  font-weight: 600;
}

.brand-tagline {
  display: block;
  font-size: 11px;
  color: #a1a1aa;
}

/* ---------- Hero ---------- */
.sk-hero {
  border-radius: 24px;
  padding: 40px 32px;
  margin: 8px 0 28px;
  background:
    radial-gradient(1200px 400px at 10% -20%, var(--brand-primary-light), transparent 60%),
    radial-gradient(900px 400px at 100% 0%, var(--brand-accent-light), transparent 55%);
  border: 1px solid var(--table-border-color);
}

.coal .sk-hero {
  background:
    radial-gradient(1200px 400px at 10% -20%, rgba(124, 58, 237, 0.25), transparent 60%),
    radial-gradient(900px 400px at 100% 0%, rgba(37, 99, 235, 0.2), transparent 55%);
}

.sk-hero__title {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  margin: 12px 0;
}

.sk-hero__subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--fg);
  opacity: 0.9;
}

.sk-announce {
  font-size: 13px;
  color: var(--sidebar-fg);
  display: flex;
  gap: 8px;
  align-items: center;
}

.sk-announce__tag {
  background-image: linear-gradient(135deg, var(--grad-from), var(--grad-to));
  color: #fff;
  border-radius: 999px;
  padding: 2px 10px;
  font-weight: 600;
  font-size: 12px;
}

/* ---------- Buttons ---------- */
.sk-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.sk-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  padding: 11px 20px;
  border-radius: 12px;
  text-decoration: none !important;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.sk-btn--primary {
  background-image: linear-gradient(135deg, var(--grad-from), var(--grad-to));
  color: #fff;
}

.sk-btn--primary:hover {
  transform: translateY(-1px);
}

.sk-btn--secondary {
  background: var(--bg);
  color: var(--fg);
  border-color: var(--table-border-color);
}

.sk-btn--star {
  background: #18181b;
  color: #fff;
}

.coal .sk-btn--star {
  background: #f4f4f5;
  color: #18181b;
}

/* ---------- Stats ---------- */
.sk-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 24px 0;
}

@media (max-width: 720px) {
  .sk-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

.sk-stats__item {
  border: 1px solid var(--table-border-color);
  border-radius: 16px;
  padding: 18px;
  text-align: center;
}

.sk-stats__value {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  background-image: linear-gradient(135deg, var(--grad-from), var(--grad-to));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sk-stats__label {
  font-size: 12px;
  color: var(--sidebar-fg);
}

/* ---------- Cards ---------- */
.sk-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 20px 0;
}

@media (max-width: 720px) {
  .sk-cards {
    grid-template-columns: 1fr;
  }
}

.sk-card {
  border: 1px solid var(--table-border-color);
  border-radius: 16px;
  padding: 20px;
}

.sk-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  font-size: 20px;
  background-image: linear-gradient(135deg, var(--grad-from), var(--grad-to));
  color: #fff;
}

.sk-card__title {
  font-weight: 600;
  margin: 12px 0 6px;
}

/* ---------- Callout boxes ---------- */
.sk-box {
  border-radius: 12px;
  padding: 14px 18px;
  margin: 16px 0;
  border-left: 4px solid;
}

.sk-box--info {
  background: var(--brand-accent-light);
  border-color: var(--brand-accent);
}

.sk-box--tip {
  background: var(--brand-primary-light);
  border-color: var(--brand-primary);
}

.sk-box--warning {
  background: var(--brand-warning-light);
  border-color: var(--brand-warning);
}

.sk-box--danger {
  background: var(--brand-danger-light);
  border-color: var(--brand-danger);
}

.coal .sk-box--info {
  background: rgba(37, 99, 235, 0.18);
}

.coal .sk-box--tip {
  background: rgba(124, 58, 237, 0.2);
}

.coal .sk-box--warning {
  background: rgba(245, 158, 11, 0.18);
}

.coal .sk-box--danger {
  background: rgba(239, 68, 68, 0.18);
}

/* ---------- Mermaid ---------- */
.mermaid {
  margin: 20px 0;
  padding: 16px;
  border: 1px solid var(--table-border-color);
  border-radius: 16px;
  background: var(--bg);
  overflow-x: auto;
  text-align: center;
}

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

/* ---------- Code ---------- */
code {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---------- Font-size control ---------- */
html[data-sk-font-scale="1"] .content {
  font-size: 1.06rem;
}

html[data-sk-font-scale="2"] .content {
  font-size: 1.14rem;
}

.sk-font-group {
  display: inline-flex;
  gap: 2px;
  margin-left: 6px;
}

.sk-font-btn {
  font-family: var(--font-display);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- Closing statement / CTA ---------- */
.sk-statement {
  margin: 32px 0;
  padding: 28px;
  border-radius: 20px;
  text-align: center;
  background-image: linear-gradient(135deg, rgba(124, 58, 237, 0.12), rgba(37, 99, 235, 0.12));
  border: 1px solid var(--table-border-color);
}

.sk-statement__text {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin: 0;
}

.sk-cta {
  margin: 28px 0;
  padding: 28px;
  border-radius: 20px;
  border: 1px solid var(--table-border-color);
}

.sk-cta__title {
  font-size: 22px;
  font-weight: 700;
}