:root {
  --bg: #ffffff;
  --bg-deep: #f1f4f9;
  --ink: #101d3d;
  --ink-soft: #4a5675;
  --line: #dfe4ee;
  --accent: #555bd8;
  --accent-deep: #444bc4;
  --accent-soft: #eef0ff;
  --radius: 14px;
  --wrap: 1040px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171a22;
    --bg-deep: #1d212b;
    --ink: #eef1f8;
    --ink-soft: #a9b2c7;
    --line: #2c3240;
    --accent: #8a8ff0;
    --accent-deep: #a3a7f5;
    --accent-soft: #252946;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 var(--font);
}
a { color: var(--accent); }
a:hover { color: var(--accent-deep); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }

header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--ink); text-decoration: none; }
.brand img { width: 28px; height: 28px; }
nav a { color: var(--ink-soft); text-decoration: none; margin-left: 20px; font-size: 15px; }
nav a:hover { color: var(--ink); }

.hero { padding: 72px 0 56px; }
.hero h1 { font-size: clamp(34px, 5.5vw, 58px); line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 18px; max-width: 16ch; }
.hero p.lead { font-size: clamp(18px, 2.2vw, 21px); color: var(--ink-soft); max-width: 46ch; margin: 0 0 28px; }
.badge { display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 4px 12px; margin-bottom: 18px; }

.btn {
  display: inline-block; background: var(--accent); color: #fff; text-decoration: none;
  font-weight: 600; padding: 13px 22px; border-radius: 10px; transition: background .15s, transform .15s;
}
.btn:hover { background: var(--accent-deep); color: #fff; transform: translateY(-1px); }
.btn:focus-visible { outline: 3px solid var(--accent-soft); outline-offset: 2px; }
.btn.pending { background: var(--bg-deep); color: var(--ink-soft); border: 1px solid var(--line); cursor: default; }
.btn.pending:hover { transform: none; }
.note { font-size: 14px; color: var(--ink-soft); margin-top: 12px; }

section { padding: 48px 0; }
section.alt { background: var(--bg-deep); }
h2 { font-size: clamp(26px, 3.4vw, 34px); letter-spacing: -0.01em; margin: 0 0 12px; }
h3 { font-size: 19px; margin: 0 0 6px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin-top: 28px; }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card p { margin: 0; color: var(--ink-soft); font-size: 16px; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 24px 0 0; }
.steps li { counter-increment: s; position: relative; padding: 0 0 18px 48px; }
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 0; width: 32px; height: 32px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent); font-weight: 700; display: grid; place-items: center;
}
.tag { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-soft); }
.shot { margin-top: 36px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--bg-deep); }
.shot img { display: block; width: 100%; height: auto; }

.doc { padding: 48px 0 64px; max-width: 72ch; }
.doc h1 { font-size: clamp(30px, 4vw, 40px); margin: 0 0 6px; }
.doc h2 { font-size: 22px; margin: 32px 0 8px; }
.doc .updated { color: var(--ink-soft); font-size: 15px; margin: 0 0 24px; }
.doc li { margin-bottom: 6px; }

footer.site { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 14px; color: var(--ink-soft); }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
footer.site a { color: var(--ink-soft); }

@media (max-width: 560px) {
  nav a { margin-left: 14px; font-size: 14px; }
  .hero { padding: 48px 0 40px; }
}
@media (prefers-reduced-motion: reduce) { .btn { transition: none; } }