:root {
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --ink: #111827;
  --grey-700: #374151;
  --grey-500: #6b7280;
  --grey-200: #e5e7eb;
  --grey-100: #f3f4f6;
  --bg: #ffffff;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(17, 24, 39, 0.06), 0 1px 3px rgba(17, 24, 39, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f3f4f6;
    --grey-700: #d1d5db;
    --grey-500: #9ca3af;
    --grey-200: #374151;
    --grey-100: #1f2937;
    --bg: #111827;
    --card-bg: #1a2233;
    --border: #2d3748;
    --danger-bg: #3b1a1a;
    --success-bg: #12281c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}

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

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
.nav {
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: 1080px;
  margin: 0 auto;
}
.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
}
.nav-logo:hover { text-decoration: none; }
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a { color: var(--grey-700); font-size: 0.95rem; }
.nav-links a:hover { color: var(--ink); }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; text-decoration: none; }
.btn-secondary { background: transparent; color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { background: var(--grey-100); text-decoration: none; }
.btn-danger { background: transparent; color: var(--danger); border-color: var(--border); }
.btn-danger:hover { background: var(--danger-bg); text-decoration: none; }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }

/* Hero */
.hero {
  padding: 96px 24px 72px;
  text-align: center;
}
.hero h1 {
  font-size: 2.6rem;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.hero p {
  font-size: 1.15rem;
  color: var(--grey-700);
  max-width: 640px;
  margin: 0 auto 32px;
}
.hero-ctas { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.section { padding: 56px 0; }
.section h2 { font-size: 1.6rem; margin-bottom: 8px; }
.section-lead { color: var(--grey-500); margin-bottom: 32px; }

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.feature-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  background: var(--card-bg);
}
.feature-card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.feature-card p { margin: 0; color: var(--grey-500); font-size: 0.95rem; }

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.pricing-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.pricing-card.featured { border-color: var(--accent); border-width: 2px; }
.pricing-tier-name { font-weight: 700; font-size: 1.1rem; margin-bottom: 4px; }
.pricing-price { font-size: 2rem; font-weight: 700; margin: 12px 0 4px; }
.pricing-price small { font-size: 0.95rem; font-weight: 400; color: var(--grey-500); }
.pricing-features { list-style: none; padding: 0; margin: 20px 0; flex: 1; }
.pricing-features li {
  padding: 8px 0;
  border-top: 1px solid var(--border);
  color: var(--grey-700);
  font-size: 0.92rem;
}
.pricing-features li:first-child { border-top: none; }

/* Docs */
.docs-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}
.docs-nav { position: sticky; top: 24px; }
.docs-nav h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--grey-500);
  margin: 20px 0 8px;
}
.docs-nav h4:first-child { margin-top: 0; }
.docs-nav ul { list-style: none; padding: 0; margin: 0; }
.docs-nav li a { display: block; padding: 4px 0; font-size: 0.9rem; color: var(--grey-700); }
.docs-nav li a:hover { color: var(--accent); text-decoration: none; }
.docs-content h1 { margin-top: 0; }
.docs-content pre {
  background: var(--grey-100);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  font-size: 0.88rem;
}
.docs-content code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.docs-content :not(pre) > code {
  background: var(--grey-100);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}
.docs-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.docs-content th, .docs-content td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .docs-layout { grid-template-columns: 1fr; }
  .docs-nav { position: static; }
}

/* Forms */
.form-card {
  max-width: 400px;
  margin: 64px auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
}
.form-card h1 { font-size: 1.4rem; margin-top: 0; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 6px; }
.field input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  background: var(--bg);
  color: var(--ink);
}
.field input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.field-errors { color: var(--danger); font-size: 0.82rem; margin-top: 4px; }

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.alert-error { background: var(--danger-bg); color: var(--danger); }
.alert-success { background: var(--success-bg); color: var(--success); }

/* Dashboard */
.dashboard-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  align-items: start;
}
.dashboard-nav ul { list-style: none; padding: 0; margin: 0; }
.dashboard-nav li a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--grey-700);
  font-size: 0.92rem;
  margin-bottom: 2px;
}
.dashboard-nav li a:hover { background: var(--grey-100); text-decoration: none; }
.dashboard-nav li a.active { background: var(--grey-100); color: var(--accent); font-weight: 600; }

.stat-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 32px; }
.stat-tile {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  min-width: 140px;
  background: var(--card-bg);
}
.stat-tile .label { font-size: 0.78rem; color: var(--grey-500); text-transform: uppercase; letter-spacing: 0.04em; }
.stat-tile .value { font-size: 1.6rem; font-weight: 700; margin-top: 4px; }

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  background: var(--card-bg);
  margin-bottom: 24px;
}
.card h2 { margin-top: 0; font-size: 1.1rem; }

table.data-table { width: 100%; border-collapse: collapse; }
table.data-table th, table.data-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
table.data-table th { color: var(--grey-500); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; }

.key-value {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--grey-100);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  word-break: break-all;
}
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge-active { background: var(--success-bg); color: var(--success); }
.badge-inactive { background: var(--danger-bg); color: var(--danger); }

.footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  color: var(--grey-500);
  font-size: 0.85rem;
  text-align: center;
}