:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6e6e73;
  --border: #d1d1d6;
  --panel: #f5f5f7;
  --blue: #0a84ff;
  --green: #34c759;
  --pink: #ff2d55;
  --yellow: #ffcc00;
  --shadow: 0 18px 55px rgba(0, 0, 0, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --fg: #f5f5f7;
    --muted: #98989d;
    --border: #38383a;
    --panel: #1c1c1e;
    --shadow: 0 18px 55px rgba(0, 0, 0, 0.45);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-weight: 700;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: block;
  object-fit: cover;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}

.site-nav a {
  color: var(--muted);
}

.site-nav a[aria-current="page"] {
  color: var(--fg);
  font-weight: 600;
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 76px 24px 52px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 450px);
  gap: 52px;
  align-items: center;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(42px, 8vw, 78px);
  line-height: 0.95;
  letter-spacing: 0;
}

.hero-copy p {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 650;
  border: 1px solid var(--border);
  color: var(--fg);
}

.button.primary {
  color: #ffffff;
  background: var(--blue);
  border-color: var(--blue);
}

.preview {
  min-height: 300px;
  border-radius: 28px;
  padding: 20px;
  background:
    linear-gradient(145deg, rgba(10, 132, 255, 0.25), transparent 34%),
    linear-gradient(315deg, rgba(255, 45, 85, 0.22), transparent 32%),
    var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.banner {
  min-height: 260px;
  border-radius: 20px;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 18% 28%, rgba(255, 204, 0, 0.9) 0 8px, transparent 9px),
    radial-gradient(circle at 82% 30%, rgba(52, 199, 89, 0.9) 0 8px, transparent 9px),
    radial-gradient(circle at 25% 80%, rgba(255, 45, 85, 0.9) 0 8px, transparent 9px),
    linear-gradient(135deg, #071325, #102845 46%, #121212);
  color: #ffffff;
  position: relative;
}

.banner::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
}

.banner-title {
  position: relative;
  text-align: center;
}

.banner-title strong {
  display: block;
  font-size: 44px;
  letter-spacing: 0;
}

.banner-title span {
  display: block;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 15px;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 24px;
}

.section h2 {
  margin: 0 0 22px;
  font-size: 30px;
  letter-spacing: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  background: var(--panel);
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.content {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.content h1 {
  margin: 0 0 8px;
  font-size: 38px;
  letter-spacing: 0;
}

.content h2 {
  margin: 32px 0 10px;
  font-size: 22px;
}

.content h3 {
  margin: 22px 0 8px;
  font-size: 17px;
}

.content p,
.content li {
  color: var(--muted);
  font-size: 16px;
}

.content code {
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--panel);
  color: var(--fg);
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

.support-box {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  background: var(--panel);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 24px;
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  align-items: center;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 44px;
  }

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