:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #dbe3ee;
  --brand: #2563eb;
  --brand-soft: #dbeafe;
  --accent: #16a34a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, #dbeafe 0%, transparent 35%),
    radial-gradient(circle at 90% 15%, #dcfce7 0%, transparent 28%),
    var(--bg);
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 26px 16px 64px;
}

.polar-support {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 1000;
  background: #111827;
  color: #f9fafb;
  text-decoration: none;
  border: 1px solid #1f2937;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.88rem;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.25);
}

.polar-support:hover {
  background: #1f2937;
}

.lang-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.lang-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  color: #0f172a;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.lang-link.active {
  background: #0f172a;
  color: #ffffff;
  border-color: #0f172a;
}

.hero {
  background: linear-gradient(140deg, #0f172a 0%, #1d4ed8 58%, #0ea5e9 100%);
  color: #fff;
  padding: 28px 24px;
  border-radius: 18px;
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.22);
}

.hero-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.hero h1 {
  margin: 0;
  line-height: 1.15;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.hero h1 .sub {
  display: inline-block;
  margin-left: 8px;
  font-size: 0.48em;
  font-weight: 500;
  color: #bfdbfe;
  letter-spacing: 0.2px;
  vertical-align: middle;
}

.hero p {
  margin: 10px 0 0;
  color: #e2e8f0;
  font-size: 1.02rem;
}

.hero h2 {
  margin: 14px 0 8px;
  color: #ffffff;
  font-size: 1.3rem;
}

.github-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(2, 6, 23, 0.35);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
}

.github-btn:hover {
  background: rgba(2, 6, 23, 0.55);
}

.github-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.pill {
  display: inline-block;
  margin-top: 14px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #f8fafc;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.9rem;
  font-weight: 600;
}

.section {
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 18px 14px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
}

h2, h3 { line-height: 1.25; }

h2 {
  margin: 0 0 10px;
  font-size: 1.3rem;
}

h3 {
  margin: 14px 0 8px;
  color: #1d4ed8;
  font-size: 1.02rem;
}

p { margin: 10px 0; }

ul { padding-left: 20px; margin: 8px 0 10px; }

li { margin: 4px 0; }

a {
  color: #1d4ed8;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
}

pre {
  background: #0b1220;
  color: #dbeafe;
  border: 1px solid #1e293b;
  border-radius: 10px;
  padding: 12px;
  margin: 8px 0 10px;
  overflow-x: auto;
}

code { font-family: "Courier New", Courier, monospace; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.mini-card {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
}

.mini-card h4 {
  margin: 0 0 6px;
  font-size: 0.95rem;
  color: #0f172a;
}

.note {
  background: var(--brand-soft);
  border-left: 4px solid var(--brand);
  padding: 10px 12px;
  margin: 10px 0 4px;
  border-radius: 8px;
  color: #0f172a;
}

.license-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 10px;
  padding: 12px;
}

.download-cta {
  text-align: center;
}

.download-btn {
  display: inline-block;
  margin-top: 6px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid #1d4ed8;
  background: #1d4ed8;
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
}

.download-btn:hover {
  background: #1e40af;
}

.big-line {
  margin: 32px 0 10px;
  border: 0;
  height: 9px;
  border-radius: 99px;
  background: linear-gradient(90deg, #0f172a 0%, #1d4ed8 50%, #16a34a 100%);
}

.footer-image {
  width: 150px;
  display: block;
  margin: 8px auto 8px;
  border-radius: 12px;
  border: 0;
  box-shadow: none;
}

.footer-copy {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.footer-copy a {
  text-decoration: none;
}