:root {
  color-scheme: dark;
  --bg: #090b10;
  --surface: #11151d;
  --surface-raised: #171d28;
  --line: #2a3445;
  --text: #e8edf5;
  --muted: #9aa8ba;
  --accent: #5eead4;
  --accent-strong: #2dd4bf;
  --code: #0d121a;
}

* { box-sizing: border-box; }

html { background: var(--bg); scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 15% -10%, #19384a 0, transparent 31rem),
    radial-gradient(circle at 90% 0, #202452 0, transparent 28rem),
    var(--bg);
  color: var(--text);
  font: 16px/1.65 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: #b8fff5; }

.site-header {
  width: min(1180px, calc(100% - 2rem));
  min-height: 76px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand { color: var(--text); text-decoration: none; font-weight: 800; letter-spacing: 0.04em; display: inline-flex; align-items: center; gap: 0.65rem; }
.brand-mark { color: #06110f; background: var(--accent); border-radius: 0.45rem; font-size: 0.73rem; padding: 0.28rem 0.38rem; }
nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 1rem; }
nav a { color: var(--muted); font-size: 0.9rem; text-decoration: none; }
nav a:hover { color: var(--accent); }
.language-menu { position: relative; }
.language-menu summary { color: var(--muted); cursor: pointer; font-size: 0.9rem; list-style: none; }
.language-menu summary::-webkit-details-marker { display: none; }
.language-menu summary::after { content: "⌄"; margin-left: 0.35rem; color: var(--accent); }
.language-menu > div { position: absolute; z-index: 5; top: 1.7rem; right: 0; width: 10.5rem; padding: 0.45rem; background: var(--surface-raised); border: 1px solid var(--line); border-radius: 0.5rem; box-shadow: 0 14px 35px #0008; }
.language-menu a { display: block; padding: 0.35rem 0.45rem; border-radius: 0.3rem; }
.language-menu a:hover { background: #223044; }

main { width: min(1080px, calc(100% - 2rem)); margin: 2.5rem auto 5rem; }
h1, h2, h3 { color: #f7fbff; line-height: 1.2; }
h1 { font-size: clamp(2.1rem, 5vw, 4.35rem); margin: 0; letter-spacing: -0.045em; }
h2 { font-size: clamp(1.45rem, 2.5vw, 2rem); margin: 3.5rem 0 1rem; letter-spacing: -0.025em; }
h3 { margin-top: 2.25rem; }
p, li { max-width: 78ch; }
code { background: var(--code); border: 1px solid var(--line); border-radius: 0.32rem; padding: 0.08rem 0.3rem; color: #c9fff8; }
pre { overflow: auto; padding: 1rem; background: var(--code); border: 1px solid var(--line); border-radius: 0.6rem; }
pre code { border: 0; padding: 0; }

table { width: 100%; border-collapse: separate; border-spacing: 0; margin: 1.2rem 0 2rem; background: rgba(17, 21, 29, 0.78); border: 1px solid var(--line); border-radius: 0.6rem; overflow: hidden; font-size: 0.92rem; }
th, td { padding: 0.55rem 0.7rem; text-align: left; border-bottom: 1px solid var(--line); }
th { background: #1a2230; color: #e9fffc; font-weight: 700; }
tr:last-child td { border-bottom: 0; }
tr:nth-child(even) td { background: rgba(255, 255, 255, 0.018); }

.hero { padding: clamp(2.4rem, 8vw, 6.5rem) 0 3rem; max-width: 850px; }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.76rem; font-weight: 800; margin-bottom: 1.1rem; }
.hero p { color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.3rem); margin: 1.4rem 0 2rem; }
.button { display: inline-block; color: #06211d; background: var(--accent); border-radius: 0.5rem; padding: 0.7rem 1rem; font-weight: 800; text-decoration: none; }
.button:hover { background: #b8fff5; color: #06211d; }

.method-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(235px, 1fr)); gap: 1rem; }
.method-card { display: block; min-height: 160px; padding: 1.2rem; color: var(--text); background: linear-gradient(145deg, rgba(27, 34, 48, 0.95), rgba(14, 18, 26, 0.95)); border: 1px solid var(--line); border-radius: 0.75rem; text-decoration: none; transition: border-color 150ms ease, transform 150ms ease; }
.method-card:hover { color: var(--text); border-color: var(--accent-strong); transform: translateY(-2px); }
.method-card strong { display: block; color: var(--accent); margin-bottom: 0.55rem; font-size: 1.05rem; }
.method-card span { color: var(--muted); font-size: 0.92rem; line-height: 1.45; }

.site-footer { width: min(1080px, calc(100% - 2rem)); margin: auto; padding: 1.5rem 0 2.5rem; display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--line); }

@media (max-width: 640px) {
  .site-header { padding: 1rem 0; align-items: flex-start; flex-direction: column; }
  nav { justify-content: flex-start; gap: 0.7rem 1rem; }
  main { margin-top: 1.2rem; }
  table { display: block; overflow-x: auto; white-space: nowrap; }
  .site-footer { flex-direction: column; }
}