:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --line: #262626;
  --text: #f2f2f2;
  --muted: #a3a3a3;
  --red: #ff3333;
  --max: 960px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}
a { color: var(--text); text-decoration-color: var(--red); text-underline-offset: 3px; }
a:hover { color: var(--red); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

header.top { border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
header.top img { height: 64px; width: auto; display: block; }
header.top nav a { color: var(--muted); text-decoration: none; margin-left: 24px; font-size: 15px; }
header.top nav a:hover { color: var(--text); }

.hero { padding-top: 96px; padding-bottom: 72px; }
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.1; font-weight: 600; margin: 0 0 24px; letter-spacing: -0.02em; }
.hero h1 span { color: var(--red); }
.hero p { font-size: 20px; color: var(--muted); max-width: 640px; margin: 0 0 32px; }
.btn { display: inline-block; background: var(--red); color: #fff; text-decoration: none; padding: 14px 24px; border-radius: 6px; font-weight: 600; }
.btn:hover { color: #fff; opacity: 0.9; }

section { padding: 64px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 28px; font-weight: 600; margin: 0 0 8px; letter-spacing: -0.01em; }
section .lead { color: var(--muted); margin: 0 0 40px; max-width: 640px; }

.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 28px; }
.card h3 { margin: 0 0 8px; font-size: 19px; font-weight: 600; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }

.steps { list-style: none; margin: 0; padding: 0; counter-reset: s; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 56px 1fr; padding: 20px 0; border-bottom: 1px solid var(--line); }
.steps li:last-child { border-bottom: 0; }
.steps li::before { content: counter(s, decimal-leading-zero); color: var(--red); font-weight: 600; }
.steps h3 { margin: 0 0 4px; font-size: 18px; font-weight: 600; }
.steps p { margin: 0; color: var(--muted); font-size: 16px; }

.contact dl { display: grid; grid-template-columns: 180px 1fr; gap: 12px 24px; margin: 0; }
.contact dt { color: var(--muted); }
.contact dd { margin: 0; }

footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
footer a { color: var(--muted); }

.doc { padding-top: 64px; padding-bottom: 96px; }
.doc > * { max-width: 760px; }
.doc h1 { font-size: 36px; font-weight: 600; margin: 0 0 8px; }
.doc .updated { color: var(--muted); margin: 0 0 40px; }
.doc h2 { font-size: 21px; font-weight: 600; margin: 40px 0 8px; }
.doc p, .doc li { color: #d4d4d4; }
.doc ul { padding-left: 20px; }

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .contact dl { grid-template-columns: 1fr; gap: 2px; }
  .contact dd { margin-bottom: 12px; }
  header.top nav a { margin-left: 16px; }
  .hero { padding-top: 64px; padding-bottom: 48px; }
}