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

:root {
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;

  /* Light theme */
  --bg: #fafafa;
  --bg-section: #f4f4f5;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafa;
  --bg-input: #ffffff;
  --border: #e4e4e7;
  --border-hover: #d4d4d8;
  --text: #09090b;
  --text-secondary: #27272a;
  --text-muted: #71717a;
  --text-dim: #a1a1aa;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99, 102, 241, 0.06);
  --accent-border: rgba(99, 102, 241, 0.2);
  --focus: rgba(99, 102, 241, 0.9);
  --green: #16a34a;
  --green-light: rgba(22, 163, 74, 0.06);
  --green-border: rgba(22, 163, 74, 0.2);
  --red: #dc2626;
  --red-light: rgba(220, 38, 38, 0.06);
  --red-border: rgba(220, 38, 38, 0.2);
  --amber: #d97706;
  --amber-light: rgba(217, 119, 6, 0.06);
  --amber-border: rgba(217, 119, 6, 0.2);
  --purple: #7c3aed;
  --purple-light: rgba(124, 58, 237, 0.06);
  --purple-border: rgba(124, 58, 237, 0.2);
  --nav-bg: rgba(250, 250, 250, 0.8);
  --loading-bg: #fafafa;
  --uptime-empty: rgba(0, 0, 0, 0.04);
  --uptime-bar-bg: rgba(0, 0, 0, 0.06);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 0 0 1px var(--border);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.08), 0 0 0 1px var(--border-hover);
  --glow-green: 0 0 24px rgba(22, 163, 74, 0.1);
  --glow-red: 0 0 24px rgba(220, 38, 38, 0.1);
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}

/* === Loading Screen === */
.loading-screen {
  position: fixed; inset: 0;
  background: var(--loading-bg);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s, visibility 0.5s;
}
.loading-screen.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.loading-spinner {
  width: 24px; height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-bottom: 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  font-size: 0.6875rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
}

/* === Navigation === */
.nav {
  position: sticky; top: 0; z-index: 100;
  padding: 14px 24px 0;
  background: transparent;
  pointer-events: none;
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(24px) saturate(1.8);
  -webkit-backdrop-filter: blur(24px) saturate(1.8);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 16px;
  transition: background 0.3s, border-color 0.3s;
  pointer-events: auto;
}

.nav-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text);
}

.nav-brand svg { color: var(--accent); }

.nav-logo {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

.nav-brand span {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex; align-items: center; gap: 8px;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover { color: var(--text); background: var(--accent-light); }

/* Live Indicator */
.live-indicator {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 500;
  padding-right: 4px;
}

.live-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.1); }
}



/* === Hero Section === */
.hero {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 48px 32px 0;
  border-bottom: none;
}

.hero-glow {
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.08) 0%, rgba(99, 102, 241, 0.02) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}



.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

/* System Status */
.system-status {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 32px;
  transition: all 0.3s;
}
.system-status.operational { background: var(--green-light); color: var(--green); border: 1px solid var(--green-border); box-shadow: var(--glow-green); }
.system-status.degraded { background: var(--amber-light); color: var(--amber); border: 1px solid var(--amber-border); }
.system-status.outage { background: var(--red-light); color: var(--red); border: 1px solid var(--red-border); box-shadow: var(--glow-red); }
.system-status-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

/* Hero Title */
.hero-title {
  font-size: 3rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 12px;
  color: var(--text);
}

.hero-title-line {
  display: block;
  font-family: var(--sans);
  font-weight: 700;
}

.hero-title em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  font-weight: 400;
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.6;
}

.last-updated {
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* === Stats Row === */
.stats-row {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  padding: 20px 32px 28px;
  max-width: 720px;
  margin: 0 auto;
}

.stat-item { text-align: center; }

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text);
  line-height: 1.1;
  font-family: var(--sans);
}

.stat-label {
  display: block;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-top: 6px;
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
  flex-shrink: 0;
}
/* === Models Section === */
.section-models {
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  padding: 40px 0 80px;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.section-title {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 400;
  font-style: italic;
  color: var(--text);
  letter-spacing: -0.02em;
}

/* === Search Box === */
.search-box {
  min-width: 200px;
  max-width: 300px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 9px 14px 9px 36px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.8125rem;
  font-family: var(--sans);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box input::placeholder { color: var(--text-dim); }

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.search-box svg {
  position: absolute;
  left: 11px; top: 50%;
  transform: translateY(-50%);
  width: 15px; height: 15px;
  color: var(--text-dim);
  pointer-events: none;
}

/* === Filters === */
.filters {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.filter-tabs {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.filter-tabs > #filter-tab-all {
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  border-radius: 0;
}

.filter-tabs-scroll {
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  flex: 1;
  min-width: 0;
}

.filter-tabs-scroll::-webkit-scrollbar { display: none; }

.filter-scroll-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 32px;
  background: none;
  border: none;
  border-left: 1px solid var(--border);
  cursor: pointer;
  color: var(--text-dim);
  transition: color 0.15s, background 0.15s, opacity 0.2s, width 0.2s;
  padding: 0;
}

.filter-scroll-btn:hover { color: var(--text); background: var(--accent-light); }
.filter-scroll-btn svg { width: 14px; height: 14px; pointer-events: none; }
.filter-scroll-btn.filter-scroll-left { border-left: none; border-right: 1px solid var(--border); }
.filter-scroll-btn.hidden { width: 0; overflow: hidden; border: none; opacity: 0; pointer-events: none; }

.filter-tab {
  padding: 8px 16px;
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1;
  color: var(--text-dim);
  cursor: pointer;
  border: none; background: none;
  transition: color 0.15s, background 0.15s;
  font-family: var(--sans);
  white-space: nowrap;
}

.filter-tab:hover { color: var(--text); background: var(--accent-light); }
.filter-tab.active { color: var(--accent); background: var(--accent-light); }

.filter-status-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-status-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  font-family: var(--sans);
  transition: all 0.15s;
}

.filter-status-btn:hover { border-color: var(--border-hover); color: var(--text); }
.filter-status-btn.active-green { background: var(--green-light); border-color: var(--green-border); color: var(--green); }
.filter-status-btn.active-red { background: var(--red-light); border-color: var(--red-border); color: var(--red); }
.filter-status-btn.active-amber { background: var(--amber-light); border-color: var(--amber-border); color: var(--amber); }
.filter-status-btn.active-purple { background: var(--purple-light); border-color: var(--purple-border); color: var(--purple); }

.filter-dot {
  width: 6px; height: 6px;
  border-radius: 50%; flex-shrink: 0;
}
.filter-dot.green { background: var(--green); }
.filter-dot.red { background: var(--red); }
.filter-dot.amber { background: var(--amber); }
.filter-dot.purple { background: var(--purple); }

/* === Model Grid === */
.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}

/* === Model Card === */
.model-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: all 0.25s ease;
  cursor: default;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.model-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.model-card-header {
  display: flex; align-items: center; gap: 10px;
}

.model-icon {
  width: 28px; height: 28px;
  border-radius: 8px; flex-shrink: 0;
  object-fit: contain;
  background: var(--bg-section);
  padding: 2px;
}

.model-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.model-status-dot {
  width: 8px; height: 8px;
  border-radius: 50%; flex-shrink: 0;
}

.model-status-dot.operational { background: var(--green); box-shadow: 0 0 10px rgba(52, 211, 153, 0.4); }
.model-status-dot.down { background: var(--red); box-shadow: 0 0 10px rgba(248, 113, 113, 0.4); }
.model-status-dot.paid_only { background: var(--amber); box-shadow: 0 0 10px rgba(251, 191, 36, 0.4); }
.model-status-dot.unknown { background: var(--text-dim); }

.model-card-meta {
  display: flex; align-items: center;
  gap: 5px; flex-wrap: wrap;
}

.badge {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.badge-reasoning { background: var(--purple-light); color: var(--purple); border: 1px solid var(--purple-border); }
.badge-paid { background: var(--amber-light); color: var(--amber); border: 1px solid var(--amber-border); }
.badge-provider { background: var(--bg-section); color: var(--text-dim); border: 1px solid var(--border); }
.badge-status { font-weight: 600; }
.badge-status.operational { color: var(--green); background: var(--green-light); border: 1px solid var(--green-border); }
.badge-status.down { color: var(--red); background: var(--red-light); border: 1px solid var(--red-border); }
.badge-status.paid_only { color: var(--amber); background: var(--amber-light); border: 1px solid var(--amber-border); }

/* === Uptime Bar === */
.uptime-bar-container { margin-top: auto; }

.uptime-bar-label {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 5px;
}

.uptime-bar-text { font-size: 0.6875rem; color: var(--text-dim); }
.uptime-bar-value { font-size: 0.6875rem; font-weight: 600; }
.uptime-bar-value.high { color: var(--green); }
.uptime-bar-value.medium { color: var(--amber); }
.uptime-bar-value.low { color: var(--red); }

.uptime-bar {
  height: 4px;
  background: var(--uptime-bar-bg);
  border-radius: 999px; overflow: hidden;
}

.uptime-bar-fill {
  height: 100%; border-radius: 999px;
  transition: width 0.6s ease;
}

.uptime-bar-fill.high { background: var(--green); }
.uptime-bar-fill.medium { background: var(--amber); }
.uptime-bar-fill.low { background: var(--red); }

/* === Uptime Timeline === */
.uptime-timeline {
  display: flex; gap: 1.5px;
  height: 24px;
  border-radius: 4px; overflow: hidden;
}

.uptime-segment {
  flex: 1; min-width: 2px;
  border-radius: 2px;
  transition: opacity 0.2s;
  position: relative;

  /* button reset */
  display: block;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
  background-color: transparent;
}

.uptime-segment.up { background: var(--green); opacity: 0.5; }
.uptime-segment.down { background: var(--red); opacity: 0.5; }
.uptime-segment.paid { background: var(--amber); opacity: 0.5; }
.uptime-segment.unknown { background: var(--uptime-empty); }
.uptime-segment:hover { opacity: 1; }
.uptime-segment:focus-visible { opacity: 1; outline: 2px solid var(--focus); outline-offset: 2px; }

/* Tooltip shown on mobile tap/click */
.segment-tooltip {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 9999;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(10,10,12,0.92);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  font-size: 0.75rem;
  line-height: 1.2;
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
}

.segment-tooltip button {
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  padding: 4px 6px;
  cursor: pointer;
  opacity: 0.85;
}
.segment-tooltip button:hover { opacity: 1; }

/* === Card Footer === */
.model-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.6875rem;
  color: var(--text-dim);
  padding-top: 4px;
  border-top: 1px solid var(--border);
}

.response-time {
  display: flex; align-items: center; gap: 4px;
  font-weight: 500;
}
.response-time svg { width: 12px; height: 12px; }

/* === Footer === */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 32px;
  transition: border-color 0.3s;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.footer-note {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.footer-links {
  display: flex; gap: 20px;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.8125rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--text); }

/* === No Results === */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 24px;
  color: var(--text-muted);
  font-size: 1rem;
}

/* === Responsive === */
@media (max-width: 768px) {
  .hero { padding: 36px 20px 0; }
  .hero-title { font-size: 2.25rem; }
  .hero-subtitle { font-size: 1rem; }

  .stats-row {
    gap: 24px;
    flex-wrap: wrap;
    padding: 28px 20px 36px;
  }
  .stat-number { font-size: 1.75rem; }
  .stat-divider { display: none; }

  .section-models { padding: 40px 0 60px; }
  .section-inner { padding: 0 20px; }
  .section-header { flex-direction: column; align-items: stretch; gap: 16px; }
  .search-box { max-width: 100%; }

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

  .nav { padding: 10px 16px 0; }
  .nav-inner { padding: 0 20px; }

  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}

@media (max-width: 480px) {
  .hero { padding: 28px 16px 0; }
  .hero-title { font-size: 1.75rem; }

  .stats-row { gap: 16px; }
  .stat-number { font-size: 1.5rem; }
  .stat-item { min-width: 60px; }

  .nav-links a:not(:last-of-type) { display: none; }
  .nav-links .live-indicator { display: none; }
}