:root {
  --ink: #0f172a;
  --ink2: #334155;
  --muted: #64748b;
  --bg: #ffffff;
  --soft: #f4f6f9;
  --line: #e2e8f0;
  --accent: #86a300;
  --accent-dark: #5c7000;
  --navy: #1c2118;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 17px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif; color: var(--ink2); background: var(--bg); }
a { color: var(--accent-dark); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

header.top { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 18px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 800; font-size: 20px; }
.brand img { width: 36px; height: 36px; }
.brand b { color: var(--accent); font-weight: inherit; }
nav.menu { margin-left: auto; display: flex; gap: 20px; align-items: center; font-size: 15px; }
nav.menu a { color: var(--ink2); text-decoration: none; }
nav.menu a:hover { color: var(--accent-dark); }
.lang { border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px; font-size: 13px; }

.hero { background: linear-gradient(135deg, #252b1f, #14170f); color: #e2e8f0; padding: 84px 0 92px; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; right: -120px; bottom: -160px; width: 520px; height: 520px; border-radius: 50%; background: radial-gradient(circle, rgba(134,163,0,.32), transparent 70%); }
.hero h1 { color: #fff; font-size: clamp(32px, 5vw, 52px); line-height: 1.12; margin: 0 0 18px; max-width: 760px; letter-spacing: -.5px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead { font-size: 19px; max-width: 640px; margin: 0 0 30px; color: #cbd5e1; }
.btn { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; font-weight: 700; padding: 13px 22px; border-radius: 10px; }
.btn:hover { background: var(--accent-dark); }
.btn.ghost { background: transparent; border: 1px solid #475569; color: #e2e8f0; margin-left: 10px; }

section { padding: 72px 0; }
section.soft { background: var(--soft); }
h2 { color: var(--ink); font-size: 32px; margin: 0 0 10px; letter-spacing: -.3px; }
p.sub { color: var(--muted); margin: 0 0 36px; max-width: 680px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 20px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.card .ic { width: 44px; height: 44px; border-radius: 10px; background: #f1f6dc; color: var(--accent-dark); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 12px; }
.card h3 { color: var(--ink); margin: 0 0 6px; font-size: 19px; }
.card p { margin: 0; font-size: 16px; }

.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; align-items: start; }
dl.req { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; margin: 0; }
dl.req dt { color: var(--muted); }
dl.req dd { margin: 0; color: var(--ink); font-weight: 600; }

.doc { max-width: 820px; padding: 48px 20px 72px; margin: 0 auto; }
.doc h1 { color: var(--ink); font-size: 34px; margin: 0 0 6px; }
.doc h2 { font-size: 22px; margin: 34px 0 8px; }
.doc .date { color: var(--muted); margin: 0 0 24px; }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }

footer { background: var(--navy); color: #94a3b8; font-size: 14px; padding: 30px 0; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; }
footer a { color: #cbd5e1; }

.todo { background: #fef3c7; color: #92400e; padding: 0 4px; border-radius: 4px; }

@media (max-width: 640px) {
  nav.menu a:not(.lang) { display: none; }
  .hero { padding: 56px 0 64px; }
  .btn.ghost { margin: 10px 0 0; }
  section { padding: 52px 0; }
}