:root {
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --surface: #ffffff;
  --border: #e6e8f0;
  --text: #16181d;
  --text-muted: #61667a;
  --primary: #4f5bd5;
  --primary-weak: #eef0fd;
  --primary-strong: #3d49c4;
  --radius: 16px;
  --radius-sm: 12px;
  --max: 1080px;
  --font: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

:root {
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101218;
    --bg-alt: #161923;
    --surface: #1a1e29;
    --border: #272c3a;
    --text: #eef0f6;
    --text-muted: #9aa1b5;
    --primary: #8b93f5;
    --primary-weak: #1e2233;
    --primary-strong: #a3aaf7;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

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

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.brand img { border-radius: 8px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  color: var(--text-muted);
}

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

.nav-gh {
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--text);
}

.nav-gh:hover { border-color: var(--primary); color: var(--primary); }

.lang-toggle {
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}

.lang-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* Hero */
.hero { padding: 72px 0 40px; }

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 40px;
}

.badge {
  display: inline-block;
  font-size: 13px;
  color: var(--primary);
  background: var(--primary-weak);
  border-radius: 999px;
  padding: 5px 14px;
  font-weight: 500;
}

.hero h1 {
  font-size: clamp(38px, 6vw, 60px);
  line-height: 1.05;
  margin: 20px 0 6px;
  letter-spacing: -1px;
}

.tagline {
  font-size: 18px;
  color: var(--text-muted);
  margin: 0 0 18px;
  font-family: var(--mono);
}

.lede {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 46ch;
  margin: 0 0 28px;
}

.actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 22px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
  cursor: pointer;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-strong); transform: translateY(-1px); }

.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.hero-meta {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--text-muted);
}

.hero-art {
  display: flex;
  justify-content: center;
}

.hero-art img {
  width: min(340px, 80%);
  border-radius: 28px;
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px -28px rgba(31, 34, 60, 0.45);
}

/* Sections */
.section { padding: 68px 0; }
.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: 26px;
  margin: 0 0 8px;
  letter-spacing: -0.4px;
}

.section-sub {
  margin: 0 0 34px;
  color: var(--text-muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* Screenshots */
.shots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 22px 18px;
}

.shot { margin: 0; }

.shot img {
  width: 100%;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 40px -30px rgba(31, 34, 60, 0.5);
}

.shot figcaption {
  text-align: center;
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Specs */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.spec-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
}

.spec-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}

.spec-list span { color: var(--text-muted); }
.spec-list b { font-weight: 500; text-align: right; }

/* Download */
.download { max-width: 760px; }

.download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
}

.dl-version { margin: 0 0 6px; font-size: 15px; color: var(--text-muted); }
.dl-version b { color: var(--text); font-size: 18px; font-family: var(--mono); }

.dl-file { margin: 0; font-family: var(--mono); font-size: 14px; word-break: break-all; }

.dl-meta { margin: 6px 0 0; font-size: 13px; color: var(--text-muted); }

.dl-sha {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 8px;
  align-items: baseline;
  flex-wrap: wrap;
}

.dl-sha code {
  font-family: var(--mono);
  font-size: 12px;
  word-break: break-all;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 8px;
}

.download-actions { display: flex; gap: 12px; }

.note {
  margin: 20px 0 0;
  font-size: 13px;
  color: var(--text-muted);
}

.note code {
  font-family: var(--mono);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-muted);
}

.footer-inner > div:first-child {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
}

.footer-inner img { border-radius: 7px; }

.copyright { margin: 0; }

.footer-links { display: flex; gap: 18px; }
.footer-links a:hover { color: var(--primary); }

@media (max-width: 820px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .hero-art img { width: min(260px, 70%); }
  .two-col { grid-template-columns: 1fr; gap: 40px; }
  .nav-links { gap: 14px; }
}

@media (max-width: 560px) {
  .nav-links a:not(.nav-gh) { display: none; }
  .section { padding: 52px 0; }
  .download-card { flex-direction: column; align-items: stretch; }
  .download-actions .btn { flex: 1; }
}