/* Keepfold site: one stylesheet, light and dark, no external requests. */
:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #1b1b1f;
  --muted: #5f5f66;
  --line: rgba(0, 0, 0, 0.1);
  --accent: #3b5bdb;
  --accent-soft: #e9edfc;
  --radius: 20px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121214;
    --surface: #1e1e22;
    --text: #ececef;
    --muted: #a6a6ae;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #7c93ff;
    --accent-soft: #23284a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
header.top { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; }
.brand svg { width: 30px; height: 30px; }
nav.lang a { color: var(--muted); text-decoration: none; font-size: 15px; margin-left: 14px; }
nav.lang a[aria-current="true"] { color: var(--text); font-weight: 600; }
.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; padding: 48px 0 72px; }
.hero h1 { font-size: clamp(38px, 6vw, 60px); line-height: 1.05; letter-spacing: -0.02em; margin: 0 0 18px; }
.hero p.lead { font-size: 20px; color: var(--muted); margin: 0 0 28px; max-width: 34ch; }
.badge { display: inline-block; padding: 10px 16px; border-radius: 999px; background: var(--accent); color: #fff; font-weight: 600; font-size: 15px; }
.badge.soft { background: var(--accent-soft); color: var(--accent); margin-left: 8px; }
.stack { display: grid; gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05); }
.card .kind { display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 3px 10px; margin-bottom: 8px; }
.card h3 { margin: 0 0 4px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card:nth-child(2) { transform: translateX(28px); }
section { padding: 56px 0; border-top: 1px solid var(--line); }
section h2 { font-size: clamp(26px, 4vw, 36px); letter-spacing: -0.01em; margin: 0 0 28px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.steps li { list-style: none; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.steps li::before { counter-increment: step; content: counter(step); display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700; margin-bottom: 12px; }
.steps, .features { padding: 0; margin: 0; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.features li { list-style: none; }
.features h3 { margin: 0 0 6px; font-size: 18px; }
.features p { margin: 0; color: var(--muted); }
.privacy { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.privacy div { background: var(--accent-soft); border-radius: var(--radius); padding: 22px; }
.privacy strong { display: block; margin-bottom: 4px; }
footer { border-top: 1px solid var(--line); padding: 28px 0 48px; color: var(--muted); font-size: 15px; display: flex; flex-wrap: wrap; gap: 18px; justify-content: space-between; }
footer a { color: var(--muted); }
.doc { max-width: 760px; padding: 24px 0 64px; }
.doc h1 { font-size: 36px; line-height: 1.15; }
.doc h2 { font-size: 22px; margin-top: 32px; }
.draft { background: #fff4d6; color: #5c4400; border-radius: 14px; padding: 14px 18px; margin: 8px 0 24px; }
@media (prefers-color-scheme: dark) { .draft { background: #3a2f12; color: #f4dfa8; } }
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 24px; }
  .steps, .features, .privacy { grid-template-columns: 1fr; }
  .card:nth-child(2) { transform: none; }
}