/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=JetBrains+Mono:wght@400;500&family=Newsreader:ital,wght@0,400;0,500;1,400;1,500&display=swap');

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

/* Design Tokens */
:root {
  --bg: #FAFAF8;
  --bg-warm: #F5F3F0;
  --fg: #1A1917;
  --fg-dim: #57534E;
  --fg-muted: #A8A29E;
  --accent: #92400E;
  --border: #D6D3D1;
  --border-light: #E7E5E4;
  --code-bg: #1C1917;
  --code-fg: #D6D3D1;
  --kw: #F97316;
  --fn: #93C5FD;
  --str: #6EE7B7;
  --cm: #78716C;
  --type: #C4B5FD;
  --num: #FCD34D;
}

/* Body */
body {
  background: var(--bg);
  font-family: 'IBM Plex Sans', -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container-wide {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Typography */
h1 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 2.4rem;
  font-weight: 500;
  line-height: 1.15;
  color: var(--fg);
  margin-bottom: 1rem;
}

h2 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1.3;
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-light);
}

h3 {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  color: var(--fg);
}

p {
  font-size: 0.95rem;
  color: var(--fg-dim);
  font-weight: 300;
  line-height: 1.8;
  margin-bottom: 1rem;
}

strong {
  color: var(--fg);
  font-weight: 500;
}

em {
  font-family: 'Newsreader', Georgia, serif;
  font-style: italic;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  background: var(--bg-warm);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  color: var(--accent);
}

/* Badge */
.badge {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 0.75rem;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

th {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  font-weight: 500;
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 2px solid var(--border-light);
}

td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
  color: var(--fg-dim);
}

/* Note */
.note {
  background: var(--bg-warm);
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1.25rem;
  border-radius: 0 4px 4px 0;
  margin-bottom: 1.5rem;
}

.note p {
  margin-bottom: 0;
}

/* Hero */
.hero {
  padding: 6rem 0 4rem;
  max-width: 600px;
}

.hero h1 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: clamp(2.2rem, 5vw, 3.2rem);
}

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--fg-dim);
  font-weight: 300;
  line-height: 1.8;
  margin-top: 1rem;
}

/* Divider */
.divider {
  border: none;
  border-top: 1px solid var(--border-light);
  margin: 3rem 0;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.9rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s;
}

.btn:hover {
  opacity: 0.9;
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.5rem;
}

/* Card */
.card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 1.5rem;
}

.card h3 {
  margin-top: 0;
}

/* Blockquote */
blockquote {
  border-left: 3px solid var(--accent);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: var(--bg-warm);
  border-radius: 0 4px 4px 0;
}

blockquote p {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 1.15rem;
  font-style: italic;
  color: var(--fg);
  line-height: 1.7;
}

blockquote cite {
  display: block;
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 0.5rem;
  font-style: normal;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-light);
  padding: 2.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--fg-muted);
  text-align: center;
  margin-top: 4rem;
}

footer a {
  color: var(--fg-muted);
}

footer a:hover {
  color: var(--accent);
}

/* Install box */
.install-box {
  background: var(--code-bg);
  color: var(--code-fg);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
}

.install-box code {
  background: none;
  color: var(--code-fg);
  padding: 0;
  font-size: 0.85rem;
}

.install-box button {
  background: none;
  border: 1px solid var(--cm);
  color: var(--fg-muted);
  padding: 0.25rem 0.75rem;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  cursor: pointer;
  white-space: nowrap;
}

.install-box button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Section spacing */
section {
  margin-bottom: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 4rem 0 2rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.3rem;
  }

  .container, .container-wide {
    padding: 0 1.25rem;
  }
}

/* Utility */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.text-center { text-align: center; }
.text-muted { color: var(--fg-muted); }
.text-dim { color: var(--fg-dim); }

/* Navigation */
.site-nav {
  border-bottom: 1px solid var(--border-light);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
}

.nav-logo {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--fg);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-icon {
  width: 24px;
  height: 24px;
}

.nav-logo:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
}

.nav-links a {
  font-size: 0.85rem;
  color: var(--fg-dim);
  text-decoration: none;
  white-space: nowrap;
  padding: 0.25rem 0;
}

.nav-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--accent);
  font-weight: 500;
}

/* Hamburger button — hidden on desktop */
.nav-burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  flex-direction: column;
  gap: 5px;
}

.nav-burger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--fg);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-burger.open span:nth-child(2) {
  opacity: 0;
}

.nav-burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .nav-inner {
    padding: 0 1.25rem;
  }

  .nav-burger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 3.5rem;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  }

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

  .nav-links a {
    font-size: 0.9rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border-light);
  }

  .nav-links a:last-child {
    border-bottom: none;
  }
}