:root {
  color-scheme: light dark;
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition-fast: 120ms ease;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 12px 24px rgba(15, 23, 42, 0.12);
  --max-width: 1100px;
  --header-height: 72px;
  --gap-sm: 0.5rem;
  --gap-md: 1rem;
  --gap-lg: 1.5rem;
  --gap-xl: 2rem;
  --bg: #f8fafc;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-elevated: #ffffff;
  --border: rgba(15, 23, 42, 0.08);
  --text: #0f172a;
  --text-muted: #475569;
  --accent: #2563eb;
  --accent-contrast: #ffffff;
  --surface-hover: rgba(241, 245, 249, 0.9);
}

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

body[data-theme="dark"] {
  --bg: #0a142b;  /* #0f172a*/
  --surface: rgba(30, 41, 59, 0.72);
  --surface-elevated: rgba(30, 41, 59, 0.88);
  --border: rgba(148, 163, 184, 0.24);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-contrast: #0f172a;
  --surface-hover: rgba(59, 73, 99, 0.85);
}

body[data-theme="light"] {
  --bg: #f8fafc;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-elevated: #ffffff;
  --border: rgba(15, 23, 42, 0.08);
  --text: #0f172a;
  --text-muted: #475569;
  --accent: #2563eb;
  --accent-contrast: #ffffff;
  --surface-hover: rgba(241, 245, 249, 0.9);
}

@media (prefers-color-scheme: dark) {
  body[data-theme="auto"] {
    --bg: #0f172a;
    --surface: rgba(30, 41, 59, 0.72);
    --surface-elevated: rgba(30, 41, 59, 0.88);
    --border: rgba(148, 163, 184, 0.24);
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-contrast: #0f172a;
    --surface-hover: rgba(59, 73, 99, 0.85);
  }
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.5;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: -999px;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap-lg) 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap-md);
  margin-bottom: 2rem;
}

.site-branding {
  display: flex;
  gap: var(--gap-md);
  align-items: center;
}

.site-logo {
  font-size: 2rem;
}

.site-branding h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0.25rem 0 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  gap: var(--gap-sm);
  align-items: center;
}

#theme-toggle {
  position: relative;
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

#theme-toggle span {
  position: absolute;
  font-size: 1.35rem;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

#theme-toggle[data-mode="light"] span[data-icon="light"],
#theme-toggle[data-mode="dark"] span[data-icon="dark"] {
  opacity: 1;
}

main {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-bottom: 1rem;
}

#app {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg);
}

.site-footer {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--gap-lg);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.no-script {
  background: #fee2e2;
  color: #991b1b;
  padding: 1rem;
  margin: var(--gap-md);
  border-radius: var(--radius-sm);
}

.controls-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap-md);
  align-items: end;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: var(--gap-lg);
  box-shadow: var(--shadow-sm);
}

.controls-panel > * {
  min-width: 0;
}

.controls-panel fieldset {
  border: none;
  margin: 0;
  padding: 0;
  min-width: min(220px, 100%);
  width: 100%;
}

.controls-panel legend {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.controls-panel label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.controls-panel input[type="search"],
.controls-panel select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  color: inherit;
}

.controls-panel .checkbox-grid {
  display: grid;
  gap: 0.5rem 1rem;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

button {
  font-family: inherit;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: inherit;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  text-decoration: none;
}

.button:hover,
.button:focus-visible {
  background: var(--surface-hover);
  box-shadow: var(--shadow-sm);
}

.button.primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: transparent;
}

.button.primary:hover,
.button.primary:focus-visible {
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.35);
  transform: translateY(-1px);
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(450px, 1fr));
  gap: var(--gap-lg);
}
@media (max-width: 840px) {
  .model-grid {
    grid-template-columns: 1fr;
  }
}

.model-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--gap-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.model-card:hover,
.model-card:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.model-card h2 {
  margin: 0;
  font-size: 1.2rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.tags,
.features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag,
.feature {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: rgba(148, 163, 184, 0.12);
  color: var(--text);
}

.pricing-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(37, 99, 235, 0.12);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  font-weight: 600;
}

.metrics-bar {
  display: grid;
  gap: 0.35rem;
}

.metrics-bar span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: var(--gap-md) var(--gap-lg);
}

.pagination-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.pagination select {
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  color: inherit;
}

.empty-state,
.error-state,
.loading-state {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--gap-xl);
  text-align: center;
  display: grid;
  gap: var(--gap-md);
  justify-items: center;
}

.results-summary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--gap-lg);
  box-shadow: var(--shadow-sm);
}

.results-summary h2 {
  margin: 0 0 0.25rem;
}

.control-footnote {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  grid-column: 1 / -1;
}

.controls-panel > .button {
  grid-column: 1 / -1;
  justify-self: end;
}

.model-detail .links {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: var(--gap-md);
}

.model-detail .links ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.model-detail .links a {
  color: inherit;
  text-decoration: underline;
}

.model-detail {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--gap-xl);
  box-shadow: var(--shadow-md);
  display: grid;
  gap: var(--gap-lg);
}

.detail-header {
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}

.detail-header h2 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap-md);
}

.pricing-card {
  background: var(--surface-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: var(--gap-md);
  display: grid;
  gap: 0.35rem;
}

.pricing-card strong {
  font-size: 1.1rem;
}

.benchmarks {
  overflow-x: auto;
}

.benchmarks table {
  width: 100%;
  border-collapse: collapse;
}

.benchmarks th,
.benchmarks td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.benchmarks th {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.compare-grid {
  display: grid;
  gap: var(--gap-lg);
}

.compare-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap-md);
}

.compare-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: var(--gap-lg);
  display: grid;
  gap: var(--gap-md);
}

.compare-card h3 {
  margin: 0;
}

.notice {
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  background: rgba(250, 204, 21, 0.18);
  color: #854d0e;
}

@media (max-width: 720px) {
  .site-header {
    padding: var(--gap-lg) var(--gap-md) 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--gap-md);
  }

  .site-branding {
    align-items: flex-start;
  }

  main {
    padding: 0 var(--gap-md) var(--gap-xl);
  }

  .controls-panel {
    padding: var(--gap-md);
    grid-template-columns: 1fr;
    gap: var(--gap-md);
  }

  .controls-panel fieldset {
    min-width: 0;
  }

  .controls-panel .checkbox-grid {
    grid-template-columns: 1fr;
  }

  .controls-panel > .button {
    width: 100%;
    justify-self: stretch;
  }

  .header-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .model-card {
    padding: var(--gap-md);
  }

  .pagination {
    flex-direction: column;
    align-items: stretch;
    gap: var(--gap-md);
  }

  .pagination-controls {
    width: 100%;
    justify-content: flex-start;
  }

  .model-detail {
    padding: var(--gap-lg);
  }

  .compare-card {
    padding: var(--gap-md);
  }
}

/* About page styles */
.about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 2.5vw + 1rem, 2.25rem);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.10), rgba(168, 85, 247, 0.10)) , var(--surface);
  box-shadow: 0 10px 40px rgba(37, 99, 235, 0.12), inset 0 1px 0 rgba(255,255,255,0.05);
  display: grid;
  gap: var(--gap-md);
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto -20%;
  height: 70%;
  background: radial-gradient(ellipse at top, rgba(56, 189, 248, 0.35), rgba(168, 85, 247, 0.0) 60%);
  filter: blur(30px);
  pointer-events: none;
}

.gradient-text {
  background: linear-gradient(90deg, var(--accent), #a855f7, #06b6d4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.about-title {
  margin: 0;
  font-size: clamp(1.5rem, 1.2rem + 1.6vw, 2.25rem);
  letter-spacing: -0.02em;
}

.about-lead {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text);
}

.about-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.35rem;
}

.about-cta {
  justify-self: start;
  margin-top: 0.25rem;
}