:root {
  --ground: #F6F6F3;
  --card: #FFFFFF;
  --ink: #17191C;
  --body: #2E3238;
  --muted: #5A5F66;
  --line: #DDDDD6;
  --card-line: #E2E2DB;
  --accent: #1F4E79;
  --accent-hover: #163A5C;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #121417;
    --card: #1A1D21;
    --ink: #EEEEEA;
    --body: #CFD2D6;
    --muted: #9AA0A7;
    --line: #2A2E33;
    --card-line: #2E3237;
    --accent: #7FB2E5;
    --accent-hover: #A9CBEE;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--sans); }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }

header.top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.mark { font-family: var(--mono); font-weight: 500; font-size: 17px; color: var(--ink); letter-spacing: 0.02em; }
.mark:hover { color: var(--ink); }
nav.main { display: flex; flex-wrap: wrap; gap: 8px 24px; font-size: 15px; }
nav.main a.lang { color: var(--muted); }

section { padding: 64px 0; border-top: 1px solid var(--line); }
section.hero { border-top: 0; padding: 96px 0 80px; display: flex; flex-direction: column; gap: 28px; }
.kicker { margin: 0; font-family: var(--mono); font-size: 14px; color: var(--muted); }
h1 { margin: 0; font-size: clamp(40px, 7vw, 76px); line-height: 1.05; font-weight: 600; letter-spacing: -0.02em; }
.lead { margin: 0; max-width: 680px; font-size: clamp(19px, 2.4vw, 24px); line-height: 1.5; color: var(--body); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; padding-top: 8px; }
.btn { display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px; font-weight: 500; font-size: 16px; border-radius: 6px; }
.btn.primary { background: var(--accent); color: var(--ground); }
.btn.primary:hover { background: var(--accent-hover); color: var(--ground); text-decoration: none; }
.btn.secondary { border: 1px solid var(--line); color: var(--ink); }
.btn.secondary:hover { border-color: var(--muted); text-decoration: none; }

h2.label { margin: 0 0 32px; font-family: var(--mono); font-size: 14px; font-weight: 500; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 32px; }
.cols h3 { margin: 0 0 10px; font-size: 20px; font-weight: 600; }
.cols p { margin: 0; font-size: 16px; line-height: 1.6; color: var(--body); }
.stack { margin: 32px 0 0; font-size: 15px; color: var(--muted); line-height: 1.6; }

.split { display: flex; flex-wrap: wrap; gap: 40px; }
.split h2.label { flex: 1 1 200px; margin: 0; }
.split .text { flex: 999 1 520px; min-width: 0; display: flex; flex-direction: column; gap: 18px; font-size: 18px; line-height: 1.65; color: var(--body); }
.split .text p { margin: 0; }
.split .text p.note { font-size: 16px; color: var(--muted); }

.intro { margin: -12px 0 32px; max-width: 720px; font-size: 18px; line-height: 1.6; color: var(--body); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--card-line); border-radius: 8px; padding: 24px; }
.card .tag { margin: 0 0 8px; font-family: var(--mono); font-size: 13px; color: var(--accent); }
.card h3 { margin: 0 0 8px; font-size: 18px; font-weight: 600; }
.card p.desc { margin: 0; font-size: 15px; line-height: 1.55; color: var(--body); }

section.contact { padding: 64px 0 80px; display: flex; flex-direction: column; gap: 20px; }
section.contact h2 { margin: 0; font-size: clamp(28px, 4vw, 40px); font-weight: 600; letter-spacing: -0.01em; }
section.contact p { margin: 0; max-width: 600px; font-size: 18px; line-height: 1.6; color: var(--body); }
section.contact a.mail { font-size: 20px; font-weight: 500; }

footer.legal { padding: 28px 0 40px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; font-size: 14px; color: var(--muted); }
footer.legal p { margin: 0; }
footer.legal .links { display: flex; flex-wrap: wrap; gap: 16px; }

article.doc { padding: 64px 0 80px; max-width: 720px; font-size: 17px; line-height: 1.65; color: var(--body); }
article.doc h1 { font-size: clamp(32px, 5vw, 48px); margin-bottom: 8px; color: var(--ink); }
article.doc h2 { margin: 40px 0 8px; font-size: 20px; color: var(--ink); }
article.doc p, article.doc ul { margin: 0 0 14px; }
article.doc .updated { color: var(--muted); font-size: 15px; margin-bottom: 32px; }