:root {
  --bg: #f2f5fb;
  --bg-soft: rgba(255, 255, 255, 0.75);
  --panel: rgba(255, 255, 255, 0.86);
  --panel-strong: rgba(255, 255, 255, 0.94);
  --line: rgba(22, 39, 71, 0.12);
  --line-strong: rgba(22, 39, 71, 0.2);
  --text: #0f1728;
  --muted: #4e5c74;
  --accent: #1273ff;
  --accent-strong: #0353d8;
  --accent-soft: rgba(18, 115, 255, 0.1);
  --success: #14b86b;
  --ink: #1c2f52;
  --shadow: 0 24px 70px rgba(12, 23, 44, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max-width: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% 12%, rgba(18, 115, 255, 0.12), transparent 28%),
    radial-gradient(circle at 84% 16%, rgba(20, 184, 107, 0.08), transparent 22%),
    linear-gradient(180deg, #f6f9ff 0%, #eef3fa 42%, #edf2f8 100%);
  color: var(--text);
  font-family: "Avenir Next", "Segoe UI Variable", "Helvetica Neue", sans-serif;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

body::before {
  background-image:
    linear-gradient(rgba(15, 23, 40, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 40, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 82%);
}

body::after {
  background:
    radial-gradient(circle at 16% 32%, rgba(18, 115, 255, 0.2) 0 1px, transparent 1px),
    radial-gradient(circle at 76% 24%, rgba(3, 83, 216, 0.14) 0 1px, transparent 1px),
    radial-gradient(circle at 58% 72%, rgba(20, 184, 107, 0.16) 0 1px, transparent 1px);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
a {
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 40;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  background: #ffffff;
  color: #000000;
}

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

.page-shell {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding-bottom: 3rem;
}

.panel {
  background: linear-gradient(180deg, var(--panel-strong), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.section {
  margin-top: 4rem;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  padding: 1rem 0 0.8rem;
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: min(27rem, 100%);
}

.brand img {
  width: 100%;
  height: auto;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.7rem;
}

.nav a {
  padding: 0.7rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.62);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--text);
  border-color: rgba(18, 115, 255, 0.4);
  transform: translateY(-1px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 1.5rem;
}

.hero-copy,
.hero-side,
.snapshot-card,
.method-card,
.footer {
  padding: 2rem;
}

.hero-copy {
  position: relative;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  right: -5rem;
  top: -5rem;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(18, 115, 255, 0.18), transparent 72%);
}

.eyebrow,
.card-kicker {
  margin: 0 0 0.8rem;
  color: var(--accent-strong);
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
summary,
.footer-title {
  margin: 0;
  font-family: "Avenir Next Condensed", "Avenir Next", "Segoe UI Variable", sans-serif;
  letter-spacing: -0.03em;
  line-height: 0.98;
}

h1 {
  max-width: 10ch;
  font-size: clamp(3.1rem, 7vw, 5.8rem);
}

h2 {
  font-size: clamp(2rem, 3.2vw, 3.2rem);
}

h3,
summary {
  font-size: 1.35rem;
}

p,
li,
td,
th,
dd,
dt,
span,
code {
  line-height: 1.65;
}

p {
  margin: 0;
  color: var(--muted);
}

strong {
  color: var(--text);
}

code {
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
  font-size: 0.95em;
}

.hero-dek {
  max-width: 58ch;
  margin-top: 1.1rem;
  font-size: 1.06rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), #2595ff);
  color: #ffffff;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--line);
  color: var(--text);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.signal-note {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.4rem;
  padding: 0.9rem 1.05rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  color: var(--ink);
}

.signal-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 0.35rem rgba(20, 184, 107, 0.16);
  flex: 0 0 auto;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.stat-card {
  padding: 1rem;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(248, 251, 255, 0.9);
}

.stat-card dt {
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.stat-card dd {
  margin: 0.5rem 0 0;
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 700;
}

.tracker-head p {
  margin-bottom: 0.7rem;
}

.tracker-list {
  display: grid;
  gap: 1rem;
  padding: 0;
  margin: 1.4rem 0 0;
  list-style: none;
}

.tracker-list li {
  padding: 1rem 1.05rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(245, 249, 255, 0.86);
}

.tracker-list strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.tracker-list span {
  color: var(--muted);
  font-size: 0.97rem;
}

.benchmark-chip-row,
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.benchmark-chip-row {
  margin-top: 1.4rem;
}

.benchmark-chip-row span,
.chip-row span {
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
  font-size: 0.86rem;
}

.section-heading {
  max-width: 70ch;
  margin-bottom: 1.4rem;
}

.section-heading p:last-child {
  margin-top: 0.9rem;
}

.snapshot-grid,
.method-grid,
.source-grid {
  display: grid;
  gap: 1rem;
}

.snapshot-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.snapshot-card h3,
.method-card h3 {
  margin-bottom: 0.8rem;
}

.chip-row {
  margin-top: 1.15rem;
}

.table-shell {
  overflow-x: auto;
  padding: 0.8rem;
}

.comparison-table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
  padding: 1.2rem 1rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.comparison-table thead th {
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.comparison-table tbody tr:last-child th,
.comparison-table tbody tr:last-child td {
  border-bottom: 0;
}

.model-name {
  display: block;
  font-size: 1.1rem;
  color: var(--text);
}

.model-subtitle {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.metric-list,
.method-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.source-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.source-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
}

.source-chip:hover,
.source-chip:focus-visible,
.source-card:hover,
.source-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(18, 115, 255, 0.4);
}

.comparison-note {
  margin-top: 1rem;
  color: var(--ink);
}

.method-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.faq-list {
  display: grid;
  gap: 0.9rem;
}

.faq-list details {
  padding: 1.1rem 1.2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.faq-list summary {
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list details p {
  margin-top: 0.8rem;
}

.source-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.source-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.25rem;
  text-decoration: none;
}

.source-card strong {
  font-size: 1.08rem;
}

.footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  margin-top: 4rem;
}

.footer-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: flex-end;
  color: var(--muted);
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .hero,
  .method-grid,
  .footer {
    grid-template-columns: 1fr;
  }

  .snapshot-grid,
  .source-grid {
    grid-template-columns: 1fr;
  }

  .footer-meta {
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(var(--max-width), calc(100% - 1rem));
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero-copy,
  .hero-side,
  .snapshot-card,
  .method-card,
  .footer {
    padding: 1.4rem;
    border-radius: 24px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}