@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

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

:root {
  --bg: #0f0f10;
  --surface: #1a1a1b;
  --surface-hover: #222223;
  --border: #2a2a2b;
  --text: #e5e5e5;
  --text-secondary: #888;
  --accent: #10a37f;
  --accent-hover: #0d8c6d;
  --code-bg: #161617;
  --radius: 10px;
}

body {
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ── */
.site-nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  text-decoration: none;
}

.nav-logo-mark {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent), #0d8c6d);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 14px;
}

.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
}

.nav-links a {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.nav-links a:hover { color: var(--text); background: var(--surface-hover); text-decoration: none; }
.nav-links a.active { color: var(--text); background: var(--bg); }

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: background 0.15s;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--accent-hover) !important; text-decoration: none !important; }

/* ── Layout ── */
.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}

.hero {
  margin-bottom: 48px;
}

.hero h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
  text-wrap: balance;
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 620px;
}

/* ── Section headers ── */
h2 {
  font-size: 22px;
  font-weight: 600;
  margin: 48px 0 16px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 28px 0 10px;
  color: var(--text);
}

p { margin-bottom: 14px; color: var(--text); }

ul, ol { padding-left: 20px; margin-bottom: 14px; }
li { margin-bottom: 6px; }

/* ── Code ── */
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  margin: 16px 0;
  position: relative;
}

code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  font-size: 13px;
  line-height: 1.7;
  color: #d4d4d4;
}

p code, li code {
  background: #2a2a2b;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 12.5px;
  color: #e5e5e5;
}

.code-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 6px;
  margin-top: 20px;
}

/* Syntax colours */
.kw  { color: #569cd6; }
.str { color: #ce9178; }
.cmt { color: #6a9955; }
.fn  { color: #dcdcaa; }
.num { color: #b5cea8; }
.cls { color: #4ec9b0; }

/* ── Callout ── */
.callout {
  background: rgba(16, 163, 127, 0.08);
  border: 1px solid rgba(16, 163, 127, 0.25);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 20px 0;
  font-size: 14px;
}

.callout-warn {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.25);
}

.callout strong { display: block; margin-bottom: 4px; }

/* ── Steps ── */
.steps { counter-reset: step; margin: 0; padding: 0; list-style: none; }

.steps li {
  counter-increment: step;
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.steps li::before {
  content: counter(step);
  background: var(--accent);
  color: #fff;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.steps li > div { flex: 1; }
.steps li strong { display: block; margin-bottom: 4px; font-size: 15px; }

/* ── Cards ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color 0.15s;
}

.card:hover { border-color: #3a3a3b; }
.card h3, .card h4 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.card p { font-size: 13px; color: var(--text-secondary); margin: 0; }

/* ── Tab switcher ── */
.tabs { display: flex; gap: 4px; margin-bottom: -1px; }
.tab {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}
.tab.active { background: var(--code-bg); border-color: var(--border); color: var(--text); }
.tab-content { display: none; }
.tab-content.active { display: block; }
.tab-panel { border: 1px solid var(--border); border-radius: 0 var(--radius) var(--radius) var(--radius); }
.tab-panel pre { border: none; border-radius: 0 var(--radius) var(--radius) var(--radius); margin: 0; }

/* ── Badge ── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.badge-green { background: rgba(16,163,127,0.15); color: var(--accent); }
.badge-blue  { background: rgba(59,130,246,0.15); color: #60a5fa; }
.badge-amber { background: rgba(245,158,11,0.15); color: #f59e0b; }

/* ── Platform icon ── */
.platform-icon { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; }
.icon { width: 24px; height: 24px; border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; font-size: 13px; }

@media (max-width: 640px) {
  .hero h1 { font-size: 26px; }
  pre { padding: 14px 16px; }

  .nav-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 10px 16px;
    gap: 8px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    flex-wrap: wrap;
    gap: 2px;
    padding-bottom: 6px;
  }

  .nav-links a {
    font-size: 13px;
    padding: 5px 10px;
  }

  .nav-cta { margin-left: auto; }
}