@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design tokens ─────────────────────────────
   Kept in sync with style.css's :root block manually — no build step
   ties the two files together, so literal values are duplicated here. */
:root {
  --color-canvas: #fdfcfc;
  --color-ink: #201d1d;
  --color-surface-soft: #f8f7f7;
  --color-surface-card: #f1eeee;
  --color-surface-dark: #201d1d;
  --color-hairline: rgba(15, 0, 0, 0.12);
  --color-hairline-strong: #646262;
  --color-charcoal: #302c2c;
  --color-body: #424245;
  --color-mute: #646262;
  --color-stone: #6e6e73;
  --color-ash: #9a9898;
  --color-accent: #007aff;
  --color-danger: #ff3b30;
  --color-warning: #ff9f0a;
  --color-success: #30d158;
  --radius-none: 0px;
  --radius-sm: 4px;
}

/* ── Base ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  background-color: var(--color-canvas) !important;
  color: var(--color-ink) !important;
  font-family: 'Inter', -apple-system, sans-serif !important;
  -webkit-font-smoothing: antialiased;
  margin: 0;
  padding: 0;
}

/* ── Fixed Nav Bar ──────────────────────────── */
#bd-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 24px;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  min-height: 44px;
}

#bd-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-ink) !important;
  text-decoration: underline !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  transition: opacity 0.2s;
  flex-shrink: 0;
}
#bd-back:hover { opacity: 0.7; text-decoration: underline !important; }
#bd-back svg { flex-shrink: 0; }

#bd-sep {
  color: var(--color-hairline-strong);
  font-size: 0.9rem;
  flex-shrink: 0;
}

#bd-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.78rem;
  color: var(--color-mute);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Article Layout ────────────────────────── */
article.page, .page.sans {
  background: transparent !important;
  color: var(--color-ink) !important;
  max-width: 860px !important;
  width: 100% !important;
  margin: 0 auto !important;
  padding: 68px 32px 80px !important;
}

/* ── Page Title ────────────────────────────── */
.page-title {
  font-family: 'Space Grotesk', sans-serif !important;
  font-size: 2.25rem !important;
  font-weight: 700 !important;
  line-height: 1.2 !important;
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  margin-bottom: 1.5rem !important;
}

.page-header-icon .icon {
  font-size: 2rem !important;
}

/* ── Headings ──────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif !important;
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
}

h1:not(.page-title) {
  font-size: 1.75rem !important;
  font-weight: 700 !important;
  border-bottom: 1px solid var(--color-hairline) !important;
  padding-bottom: 0.5rem !important;
  margin-top: 2.5rem !important;
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
}

h2 {
  font-size: 1.35rem !important;
  font-weight: 600 !important;
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  border-left: 3px solid var(--color-hairline-strong) !important;
  padding-left: 12px !important;
  margin-top: 2rem !important;
  background: none !important;
  -webkit-background-clip: unset !important;
  background-clip: unset !important;
}

h3 {
  font-size: 1.1rem !important;
  font-weight: 600 !important;
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  border-left: 3px solid var(--color-hairline) !important;
  padding-left: 10px !important;
  margin-top: 1.5rem !important;
  background: none !important;
  -webkit-background-clip: unset !important;
  background-clip: unset !important;
}

/* ── Body Text ─────────────────────────────── */
p {
  color: var(--color-body) !important;
  line-height: 1.7 !important;
}

li {
  color: var(--color-body) !important;
  line-height: 1.7 !important;
}

strong, b {
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  font-weight: 600 !important;
}

/* ── Links (content only) ─────────────────── */
.page-body a:not(#bd-back) {
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  text-decoration: underline !important;
}
.page-body a:not(#bd-back):hover {
  color: var(--color-charcoal) !important;
  -webkit-text-fill-color: var(--color-charcoal) !important;
  text-decoration: underline !important;
}

/* ── Inline Code ────────────────────────────── */
code:not(pre code) {
  background: var(--color-surface-card) !important;
  border: 1px solid var(--color-hairline) !important;
  border-radius: var(--radius-sm) !important;
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.85em !important;
  padding: 2px 6px !important;
}

/* ── Code Blocks ────────────────────────────── */
/* Deliberate exception: code blocks stay on the dark surface — a code
   block functionally extends the in-product TUI DESIGN.md reserves the
   semantic accent ramp for, so this is the one recurring dark surface
   permitted outside the (non-existent, on these pages) hero mockup. */
pre {
  background: var(--color-surface-dark) !important;
  border: none !important;
  border-radius: var(--radius-sm) !important;
  padding: 1.25rem 1.5rem !important;
  overflow-x: auto !important;
  -webkit-overflow-scrolling: touch !important;
  margin: 1.25rem 0 !important;
  box-shadow: none !important;
}

pre code {
  background: transparent !important;
  border: none !important;
  color: var(--color-ash) !important;
  -webkit-text-fill-color: var(--color-ash) !important;
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.875rem !important;
  padding: 0 !important;
  line-height: 1.75 !important;
}

/* ── Prism.js Token Colors ──────────────────── */
pre code, pre code .token, code[class*="language-"], pre[class*="language-"] {
  text-shadow: none !important;
}

.token.comment, .token.prolog, .token.doctype, .token.cdata {
  color: var(--color-ash) !important;
  -webkit-text-fill-color: var(--color-ash) !important;
}
.token.keyword, .token.selector, .token.important, .token.atrule, .token.rule {
  color: var(--color-accent) !important;
  -webkit-text-fill-color: var(--color-accent) !important;
}
.token.string, .token.char, .token.attr-value, .token.regex, .token.inserted {
  color: var(--color-success) !important;
  -webkit-text-fill-color: var(--color-success) !important;
}
.token.number, .token.boolean, .token.constant, .token.symbol {
  color: var(--color-warning) !important;
  -webkit-text-fill-color: var(--color-warning) !important;
}
.token.function, .token.class-name {
  color: var(--color-accent) !important;
  -webkit-text-fill-color: var(--color-accent) !important;
}
.token.operator, .token.entity, .token.url {
  color: #f8f7f7 !important;
  -webkit-text-fill-color: #f8f7f7 !important;
}
.token.punctuation {
  color: var(--color-ash) !important;
  -webkit-text-fill-color: var(--color-ash) !important;
}
.token.tag, .token.deleted {
  color: var(--color-danger) !important;
  -webkit-text-fill-color: var(--color-danger) !important;
}
.token.attr-name {
  color: var(--color-warning) !important;
  -webkit-text-fill-color: var(--color-warning) !important;
}
.token.variable {
  color: var(--color-accent) !important;
  -webkit-text-fill-color: var(--color-accent) !important;
}
.token.property {
  color: var(--color-accent) !important;
  -webkit-text-fill-color: var(--color-accent) !important;
}

/* ── Tables ─────────────────────────────────── */
table {
  border-collapse: collapse !important;
  width: 100% !important;
  margin: 1.25rem 0 !important;
  font-size: 0.875rem !important;
  overflow-x: auto !important;
  display: block !important;
}

th {
  background: var(--color-surface-card) !important;
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  border: 1px solid var(--color-hairline) !important;
  padding: 10px 14px !important;
  font-family: 'Space Grotesk', sans-serif !important;
  font-weight: 600 !important;
  text-align: left !important;
}

td {
  border: 1px solid var(--color-hairline) !important;
  padding: 9px 14px !important;
  color: var(--color-body) !important;
  -webkit-text-fill-color: var(--color-body) !important;
}

tr:nth-child(even) td {
  background: var(--color-surface-soft) !important;
}

/* ── Callout ────────────────────────────────── */
.callout {
  background: var(--color-surface-card) !important;
  border: 1px solid var(--color-hairline) !important;
  border-radius: var(--radius-sm) !important;
  padding: 14px 18px !important;
  margin: 1.25rem 0 !important;
  color: var(--color-body) !important;
  -webkit-text-fill-color: var(--color-body) !important;
}
.callout.block-color-gray_background { border-left: 3px solid var(--color-hairline-strong) !important; }
.callout.block-color-blue_background  { border-left: 3px solid var(--color-accent) !important; }
.callout.block-color-yellow_background { border-left: 3px solid var(--color-warning) !important; }
.callout.block-color-red_background   { border-left: 3px solid var(--color-danger) !important; }
.callout.block-color-green_background { border-left: 3px solid var(--color-success) !important; }
.callout.block-color-purple_background { border-left: 3px solid var(--color-charcoal) !important; }

/* ── TOC (Table of Contents) ──────────────── */
.table_of_contents {
  background: var(--color-surface-soft) !important;
  border: 1px solid var(--color-hairline) !important;
  border-radius: var(--radius-sm) !important;
  padding: 16px 20px !important;
  margin: 1.5rem 0 !important;
}
.table_of_contents a, .table_of_contents-link {
  color: var(--color-mute) !important;
  -webkit-text-fill-color: var(--color-mute) !important;
  font-size: 0.875rem !important;
  text-decoration: none !important;
}
.table_of_contents a:hover, .table_of_contents-link:hover {
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
}

/* ── Bookmark Cards ─────────────────────────── */
.bookmark {
  background: var(--color-canvas) !important;
  border: 1px solid var(--color-hairline) !important;
  border-radius: var(--radius-sm) !important;
  margin: 1.25rem 0 !important;
  overflow: hidden !important;
}
.bookmark-title {
  color: var(--color-ink) !important;
  -webkit-text-fill-color: var(--color-ink) !important;
  font-weight: 600 !important;
  font-family: 'Space Grotesk', sans-serif !important;
}
.bookmark-description {
  color: var(--color-mute) !important;
  -webkit-text-fill-color: var(--color-mute) !important;
  font-size: 0.875rem !important;
}
.bookmark-href {
  color: var(--color-stone) !important;
  -webkit-text-fill-color: var(--color-stone) !important;
  font-size: 0.78rem !important;
  font-family: 'JetBrains Mono', monospace !important;
}
.bookmark-icon { filter: invert(0) !important; }

/* ── Block Color Text ────────────────────────── */
.block-color-gray   { color: var(--color-mute) !important; -webkit-text-fill-color: var(--color-mute) !important; }
.block-color-brown  { color: var(--color-stone) !important; -webkit-text-fill-color: var(--color-stone) !important; }
.block-color-orange { color: var(--color-warning) !important; -webkit-text-fill-color: var(--color-warning) !important; }
.block-color-yellow { color: var(--color-warning) !important; -webkit-text-fill-color: var(--color-warning) !important; }
.block-color-teal   { color: var(--color-success) !important; -webkit-text-fill-color: var(--color-success) !important; }
.block-color-blue   { color: var(--color-accent) !important; -webkit-text-fill-color: var(--color-accent) !important; }
.block-color-purple { color: var(--color-charcoal) !important; -webkit-text-fill-color: var(--color-charcoal) !important; }
.block-color-pink   { color: var(--color-charcoal) !important; -webkit-text-fill-color: var(--color-charcoal) !important; }
.block-color-red    { color: var(--color-danger) !important; -webkit-text-fill-color: var(--color-danger) !important; }

/* ── Block Background Colors ────────────────── */
.block-color-gray_background   { background: rgba(100,98,98,0.10) !important; border-radius: var(--radius-sm) !important; }
.block-color-orange_background { background: rgba(255,159,10,0.08) !important; border-radius: var(--radius-sm) !important; }
.block-color-yellow_background { background: rgba(255,159,10,0.08) !important; border-radius: var(--radius-sm) !important; }
.block-color-teal_background   { background: rgba(48,209,88,0.08) !important; border-radius: var(--radius-sm) !important; }
.block-color-blue_background   { background: rgba(0,122,255,0.06) !important; border-radius: var(--radius-sm) !important; }
.block-color-purple_background { background: var(--color-surface-card) !important; border-radius: var(--radius-sm) !important; }
.block-color-pink_background   { background: var(--color-surface-card) !important; border-radius: var(--radius-sm) !important; }
.block-color-red_background    { background: rgba(255,59,48,0.06) !important; border-radius: var(--radius-sm) !important; }

/* ── Misc Notion Elements ───────────────────── */
.checkbox {
  border-color: var(--color-hairline-strong) !important;
  background: transparent !important;
}

hr {
  border: none !important;
  border-top: 1px solid var(--color-hairline) !important;
  margin: 2rem 0 !important;
}

blockquote {
  border-left: 3px solid var(--color-hairline-strong) !important;
  color: var(--color-body) !important;
  background: var(--color-surface-soft) !important;
  padding: 12px 20px !important;
  margin: 1.25rem 0 !important;
  border-radius: var(--radius-none) !important;
}

/* ── Images ─────────────────────────────────── */
img:not(.bookmark-icon):not(.icon) {
  max-width: 100% !important;
  border-radius: var(--radius-none) !important;
  border: 1px solid var(--color-hairline) !important;
  display: block !important;
  margin: 1rem auto !important;
}

/* ── Link to Page (Notion) ──────────────────── */
.link-to-page {
  background: var(--color-surface-card) !important;
  border: 1px solid var(--color-hairline) !important;
  border-radius: var(--radius-sm) !important;
  padding: 10px 16px !important;
  margin: 1rem 0 !important;
}
.link-to-page:hover {
  border-color: var(--color-hairline-strong) !important;
}

/* ── AdSense Area ───────────────────────────── */
#ads3 {
  margin-top: 3rem !important;
  padding-top: 2rem !important;
  border-top: 1px solid var(--color-hairline) !important;
}

/* ── Mobile Responsive ──────────────────────── */
@media (max-width: 768px) {
  article.page, .page.sans {
    padding: 60px 16px 60px !important;
  }

  .page-title {
    font-size: 1.6rem !important;
    line-height: 1.3 !important;
  }

  h2 { font-size: 1.15rem !important; }
  h3 { font-size: 1rem !important; }

  pre {
    padding: 1rem !important;
    border-radius: 8px !important;
  }

  pre code {
    font-size: 0.8rem !important;
  }

  table {
    font-size: 0.8rem !important;
  }

  th, td {
    padding: 7px 10px !important;
  }

  #bd-nav {
    padding: 8px 16px !important;
  }

  #bd-label {
    display: none;
  }
}

@media (max-width: 480px) {
  .page-title {
    font-size: 1.35rem !important;
  }

  pre code {
    font-size: 0.75rem !important;
  }
}