:root {
  --bg: #0f1117; --bg-card: #1a1d27; --bg-input: #252836; --border: #2e3146;
  --text: #e4e4e7; --text-dim: #9395a5; --primary: #f97316; --primary-hover: #ea580c;
  --success: #22c55e; --error: #ef4444; --radius: 8px;
  --font: 'Inter', -apple-system, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; }

nav { padding: 16px 0; border-bottom: 1px solid var(--border); }
nav .container { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 1.4rem; font-weight: 700; color: var(--text); }
.logo span { color: var(--primary); }
nav .links { display: flex; gap: 24px; align-items: center; }
nav .links a { color: var(--text-dim); font-size: 0.9rem; }
nav .links a:hover { color: var(--text); text-decoration: none; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border: none; border-radius: var(--radius); font-family: var(--font); font-size: 0.9rem; font-weight: 500; cursor: pointer; transition: all 0.15s; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); text-decoration: none; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }

.hero { padding: 80px 0 60px; text-align: center; }
.hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 16px; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: 1.15rem; color: var(--text-dim); max-width: 620px; margin: 0 auto 32px; }
.hero .btns { display: flex; gap: 12px; justify-content: center; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; padding: 60px 0; }
.feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 28px; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { color: var(--text-dim); font-size: 0.9rem; }

.code-block { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; overflow-x: auto; margin: 16px 0; }
.code-block pre { font-family: var(--mono); font-size: 0.85rem; line-height: 1.5; white-space: pre-wrap; word-break: break-all; }
.comment { color: var(--text-dim); } .string { color: var(--success); } .keyword { color: var(--primary); }

.pricing { padding: 80px 0; border-top: 1px solid var(--border); }
.pricing h2 { text-align: center; font-size: 2rem; margin-bottom: 48px; }
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; max-width: 960px; margin: 0 auto; }
.pricing-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 28px; text-align: center; }
.pricing-card.featured { border-color: var(--primary); }
.plan-name { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-dim); margin-bottom: 8px; }
.price { font-size: 2.5rem; font-weight: 800; } .price span { font-size: 1rem; color: var(--text-dim); font-weight: 400; }
.pricing-card ul { list-style: none; margin: 20px 0; text-align: left; }
.pricing-card li { padding: 6px 0; color: var(--text-dim); font-size: 0.88rem; border-bottom: 1px solid var(--border); }
.pricing-card li:last-child { border: none; }

.form-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 40px; max-width: 420px; margin: 60px auto; }
.form-card h2 { margin-bottom: 24px; text-align: center; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 6px; }
.form-group input { width: 100%; padding: 10px 14px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-size: 0.9rem; }
.form-group input:focus { outline: none; border-color: var(--primary); }
.form-error { color: var(--error); font-size: 0.85rem; margin-top: 8px; display: none; }
.form-card .btn { width: 100%; justify-content: center; margin-top: 8px; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-top: 24px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stat-card .label { font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; }
.stat-card .value { font-size: 1.8rem; font-weight: 700; margin-top: 4px; }
.api-key-display { display: flex; align-items: center; gap: 12px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; margin-top: 8px; }
.api-key-display code { flex: 1; font-family: var(--mono); font-size: 0.9rem; }

.docs-layout { display: grid; grid-template-columns: 200px 1fr; gap: 40px; padding: 40px 0; min-height: calc(100vh - 65px); }
.docs-sidebar { border-right: 1px solid var(--border); padding-right: 24px; }
.docs-sidebar a { display: block; padding: 6px 0; color: var(--text-dim); font-size: 0.88rem; }
.docs-sidebar a:hover { color: var(--text); text-decoration: none; }
.docs-content h2 { margin: 32px 0 16px; font-size: 1.5rem; } .docs-content h2:first-child { margin-top: 0; }
.docs-content h3 { margin: 24px 0 12px; font-size: 1.1rem; }
.docs-content p { color: var(--text-dim); margin-bottom: 12px; }
.docs-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.docs-content th, .docs-content td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 0.88rem; }
.docs-content th { color: var(--text-dim); }

footer { padding: 40px 0; border-top: 1px solid var(--border); text-align: center; color: var(--text-dim); font-size: 0.85rem; }

@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; } .docs-layout { grid-template-columns: 1fr; }
  .hero .btns { flex-direction: column; align-items: center; }
}