/* ModelBridge User Portal — 统一样式 */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #1c2128;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --card-bg: #161b22;
  --code-bg: #1c2128;
  --radius: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* ── Navigation ─────────────────────────── */
.navbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 64px;
  background: rgba(13, 17, 23, 0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}
.nav-brand {
  font-size: 20px; font-weight: 700; letter-spacing: -0.5px;
  display: flex; align-items: center; gap: 8px;
}
.nav-brand .logo-icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, #58a6ff, #a371f7);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: #fff;
}
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-actions { display: flex; gap: 12px; }

/* ── Buttons ────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border-radius: var(--radius); font-size: 14px; font-weight: 600;
  cursor: pointer; border: none; transition: all 0.2s;
}
.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--accent);
  border: 1px solid var(--border-color);
}
.btn-outline:hover { border-color: var(--accent); background: rgba(88,166,255,0.08); }
.btn-danger {
  background: transparent; color: var(--danger);
  border: 1px solid var(--danger);
}
.btn-danger:hover { background: rgba(248,81,73,0.12); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-block { width: 100%; }

/* ── Container ─────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }

/* ── Hero ──────────────────────────────── */
.hero {
  text-align: center; padding: 100px 24px 60px;
  background: radial-gradient(ellipse at top, rgba(88,166,255,0.08) 0%, transparent 70%);
}
.hero h1 {
  font-size: 52px; font-weight: 800; letter-spacing: -1.5px;
  margin-bottom: 16px; line-height: 1.15;
}
.hero h1 span { background: linear-gradient(135deg, #58a6ff, #a371f7); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 20px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 36px; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ── Cards Grid ───────────────────────── */
.cards-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px; margin-top: 48px;
}
.card {
  background: var(--card-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 28px 24px;
  transition: transform 0.2s, border-color 0.2s;
}
.card:hover { transform: translateY(-3px); border-color: rgba(88,166,255,0.3); }
.card-icon {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 16px;
}
.card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--text-secondary); line-height: 1.55; }

/* ── Forms ─────────────────────────────── */
.auth-container {
  max-width: 420px; margin: 80px auto; padding: 0 20px;
}
.auth-box {
  background: var(--card-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 40px 32px;
}
.auth-box h2 {
  font-size: 26px; font-weight: 700; text-align: center; margin-bottom: 8px;
}
.auth-box .sub {
  text-align: center; color: var(--text-secondary); font-size: 14px; margin-bottom: 32px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 13px; font-weight: 600; color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-control {
  width: 100%; padding: 10px 14px;
  background: var(--bg-tertiary); border: 1px solid var(--border-color);
  border-radius: var(--radius); color: var(--text-primary);
  font-size: 15px; outline: none; transition: border-color 0.2s;
}
.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(88,166,255,0.15); }
.form-error { color: var(--danger); font-size: 13px; margin-top: 4px; display: none; }
.form-footer { text-align: center; margin-top: 24px; font-size: 14px; color: var(--text-secondary); }

/* ── Dashboard ─────────────────────────── */
.dashboard-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 40px 0 30px;
}
.dashboard-header h1 { font-size: 28px; font-weight: 700; }
.user-email { color: var(--text-secondary); font-size: 14px; }

.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px; margin-bottom: 36px;
}
.stat-card {
  background: var(--card-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 24px;
}
.stat-card .stat-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; }
.stat-card .stat-value { font-size: 32px; font-weight: 800; }
.stat-card .stat-unit { font-size: 14px; color: var(--text-muted); font-weight: 400; }

/* Key Card */
.key-card {
  background: var(--card-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 28px; margin-bottom: 28px;
}
.key-card h3 { font-size: 18px; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.key-display {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-tertiary); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 12px 16px; margin-bottom: 14px;
}
.key-display code {
  flex: 1; font-family: "SF Mono", Monaco, monospace; font-size: 14px;
  color: var(--accent); word-break: break-all;
}
.copy-btn {
  padding: 6px 14px; font-size: 12px; cursor: pointer;
  background: var(--bg-tertiary); border: 1px solid var(--border-color);
  border-radius: var(--radius); color: var(--text-secondary);
  white-space: nowrap;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }

/* Code Block */
.code-block {
  background: var(--code-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius); overflow: hidden; margin-bottom: 28px;
}
.code-tabs { display: flex; border-bottom: 1px solid var(--border-color); }
.code-tab {
  padding: 10px 20px; font-size: 13px; font-weight: 600; cursor: pointer;
  color: var(--text-secondary); border-bottom: 2px solid transparent;
  transition: all 0.2s;
}
.code-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.code-tab:hover { color: var(--text-primary); }
.code-content { padding: 20px; }
.code-content pre {
  font-family: "SF Mono", Monaco, monospace; font-size: 13px; line-height: 1.65;
  white-space: pre-wrap; word-break: break-all;
  margin: 0;
}
.code-content .keyword { color: #ff7b72; }
.code-content .string { color: #a5d6ff; }
.code-content .comment { color: var(--text-muted); }
.code-content .func { color: #d2a8ff; }

/* Usage Table */
.usage-table {
  width: 100%; border-collapse: collapse;
  background: var(--card-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); overflow: hidden;
}
.usage-table th {
  text-align: left; padding: 12px 16px; font-size: 13px; font-weight: 600;
  color: var(--text-secondary); background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}
.usage-table td {
  padding: 12px 16px; font-size: 14px; border-bottom: 1px solid var(--border-color);
}
.usage-table tr:last-child td { border-bottom: none; }
.status-dot {
  width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 6px;
}
.status-ok { background: var(--success); }

/* ── Pricing ───────────────────────────── */
.pricing-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; margin-top: 48px;
}
.pricing-card {
  background: var(--card-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 36px 28px; text-align: center;
  transition: transform 0.2s, border-color 0.2s;
  position: relative;
}
.pricing-card.featured {
  border-color: var(--accent); transform: scale(1.03);
}
.pricing-card.featured::before {
  content: "Popular"; position: absolute; top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--accent); color: #fff; padding: 3px 16px;
  border-radius: 12px; font-size: 12px; font-weight: 600;
}
.pricing-card:hover { transform: translateY(-4px); }
.pricing-card.featured:hover { transform: scale(1.03) translateY(-4px); }
.pricing-card h3 { font-size: 20px; margin-bottom: 8px; }
.price {
  font-size: 42px; font-weight: 800; margin: 16px 0 4px;
}
.price span { font-size: 16px; font-weight: 400; color: var(--text-secondary); }
.per { color: var(--text-muted); font-size: 14px; }
.pricing-features { list-style: none; margin: 24px 0; text-align: left; }
.pricing-features li {
  padding: 8px 0; font-size: 14px; color: var(--text-secondary);
  display: flex; align-items: center; gap: 8px;
}
.pricing-features li::before { content: "✓"; color: var(--success); font-weight: 700; }

/* ── Docs ──────────────────────────────── */
.doc-section { margin-bottom: 48px; }
.doc-section h2 {
  font-size: 24px; font-weight: 700; margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 1px solid var(--border-color);
}
.doc-section h3 { font-size: 18px; font-weight: 600; margin: 20px 0 10px; color: var(--accent); }
.doc-section p { color: var(--text-secondary); font-size: 15px; line-height: 1.75; margin-bottom: 12px; }
.endpoint-table {
  width: 100%; border-collapse: collapse; margin: 16px 0;
  background: var(--card-bg); border: 1px solid var(--border-color);
  border-radius: var(--radius); overflow: hidden;
}
.endpoint-table th, .endpoint-table td {
  padding: 12px 16px; font-size: 14px; text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.endpoint-table th { background: var(--bg-tertiary); font-weight: 600; color: var(--text-secondary); }
.method-badge {
  display: inline-block; padding: 2px 10px; border-radius: 6px;
  font-size: 12px; font-weight: 700; font-family: "SF Mono", Monaco, monospace;
}
.method-get { background: rgba(63,185,80,0.15); color: var(--success); }
.method-post { background: rgba(88,166,255,0.15); color: var(--accent); }

/* ── Footer ────────────────────────────── */
.footer {
  text-align: center; padding: 40px 24px;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted); font-size: 13px;
}

/* ── Toast / Alert ─────────────────────── */
.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  padding: 14px 22px; border-radius: var(--radius);
  font-size: 14px; font-weight: 500; animation: slideIn 0.3s ease;
  display: none;
}
.toast.show { display: block; }
.toast-success { background: rgba(63,185,80,0.15); border: 1px solid var(--success); color: var(--success); }
.toast-error { background: rgba(248,81,73,0.12); border: 1px solid var(--danger); color: var(--danger); }

@keyframes slideIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ────────────────────────── */
@media (max-width: 768px) {
  .hero h1 { font-size: 34px; }
  .hero p { font-size: 16px; }
  .navbar { padding: 0 16px; }
  .nav-links { display: none; } /* mobile menu can be added later */
  .cards-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card.featured { transform: none; }
  .pricing-card.featured:hover { transform: translateY(-4px); }
}

/* ── Loading spinner ───────────────────── */
.spinner {
  display: inline-block; width: 20px; height: 20px;
  border: 2px solid var(--border-color); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center; z-index: 999;
}

/* ── Subscription Card (v2.3) ─────────── */
.plan-badge {
  padding: 3px 12px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.plan-badge.free {
  background: rgba(88,166,255,0.15); color: var(--accent);
}
.plan-badge.pro {
  background: rgba(163,113,247,0.2); color: #a371f7;
}
.plan-badge.enterprise {
  background: rgba(63,185,80,0.15); color: var(--success);
}

.progress-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #a371f7);
  border-radius: 4px;
  transition: width 0.4s ease;
}
.progress-fill.warning {
  background: linear-gradient(90deg, var(--warning), var(--danger));
}