:root {
  color-scheme: light;
  --bg: #f2f5f9;
  --bg-glow: radial-gradient(circle at 80% -10%, #dbe6f3 0%, transparent 45%);
  --surface: #ffffff;
  --surface-alt: #e8eef5;
  --text: #1a2633;
  --muted: #59697a;
  --accent: #2f5d8a;
  --accent-strong: #1f4569;
  --border: #c9d4e0;
  --shadow: 0 8px 28px rgba(26, 38, 51, 0.08);
  --header-bg: rgba(242, 245, 249, 0.9);
  --section-accent-bg: linear-gradient(180deg, rgba(47, 93, 138, 0.1) 0%, rgba(47, 93, 138, 0.03) 100%);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg-glow), var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Inter", "Helvetica Neue", sans-serif;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero {
  padding: 5rem 0 3rem;
}

.eyebrow {
  margin: 0;
  color: var(--accent-strong);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.82rem;
}

h1 {
  margin: 0.5rem 0 0.8rem;
  font-size: clamp(2rem, 4.8vw, 3.3rem);
  line-height: 1.1;
}

.lead {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 760px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.btn {
  display: inline-block;
  padding: 0.72rem 1rem;
  border-radius: 10px;
  font-weight: 600;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-strong);
  text-decoration: none;
}

.btn-secondary {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

.btn-secondary:hover {
  text-decoration: none;
}

.section {
  padding: 2.5rem 0;
}

.section-accent {
  background: var(--section-accent-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

h2 {
  margin-top: 0;
  font-size: clamp(1.4rem, 2.8vw, 2rem);
}

.section-copy {
  color: var(--muted);
  margin-top: -0.4rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.9rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.9rem;
}

.download-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.download-card h3 {
  margin-top: 0;
  margin-bottom: 0.2rem;
}

.download-card.disabled {
  opacity: 0.7;
}

.release-meta {
  margin-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
}

.release-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.65rem;
}

.release-list li {
  padding: 0.75rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 0;
  margin-top: 1.5rem;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-wrap p {
  margin: 0;
}

.footer-wrap p:last-child {
  display: flex;
  gap: 1rem;
}

.docs-layout {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: minmax(200px, 280px) 1fr;
}

.docs-toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  align-self: start;
  position: sticky;
  top: 88px;
}

.docs-toc h2 {
  margin: 0 0 0.6rem;
  font-size: 1.1rem;
}

.docs-toc a {
  display: block;
  margin-bottom: 0.45rem;
}

.docs-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
}

@media (max-width: 800px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .docs-toc {
    position: static;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0f1620;
    --bg-glow: radial-gradient(circle at 80% -10%, rgba(62, 97, 134, 0.35) 0%, transparent 45%);
    --surface: #182332;
    --surface-alt: #1d2a3b;
    --text: #e4ebf3;
    --muted: #adbac8;
    --accent: #5f88b3;
    --accent-strong: #8baecf;
    --border: #2d3d50;
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
    --header-bg: rgba(15, 22, 32, 0.9);
    --section-accent-bg: linear-gradient(180deg, rgba(95, 136, 179, 0.16) 0%, rgba(95, 136, 179, 0.05) 100%);
  }
}