:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --ink: #14161a;
  --muted: #5b616b;
  --line: #e4e5e8;
  --accent: #1f5eff;
  --accent-ink: #ffffff;
  --accent-soft: #eaf0ff;
  --radius: 14px;
  --max: 1080px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1013;
    --surface: #15181d;
    --ink: #eceef1;
    --muted: #9aa1ab;
    --line: #262a31;
    --accent: #6e95ff;
    --accent-ink: #0e1013;
    --accent-soft: #18213a;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; background: var(--surface); padding: 8px 12px; z-index: 10; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 5; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 650; letter-spacing: -0.01em; }
.brand svg { width: 30px; height: 30px; flex: none; }
.brand span b { font-weight: 650; }
.brand span { font-size: 1.05rem; }
.nav { display: flex; gap: 20px; font-size: .95rem; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
@media (max-width: 560px) { .nav .hide-sm { display: none; } }

/* Hero */
.hero { padding-top: 88px; padding-bottom: 72px; }
.eyebrow { font-family: var(--mono); font-size: .85rem; color: var(--accent); margin-bottom: 18px; letter-spacing: .02em; }
.hero p.lead { font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--muted); max-width: 680px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.btn { display: inline-block; padding: 12px 20px; border-radius: 10px; font-weight: 600; text-decoration: none; border: 1px solid var(--line); color: var(--ink); background: var(--surface); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn:hover { text-decoration: none; filter: brightness(1.05); }

/* Sections */
section { padding: 72px 0; border-top: 1px solid var(--line); }
.section-head { max-width: 680px; margin-bottom: 40px; }
.section-head p { color: var(--muted); }

.grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 720px) { .grid.two { grid-template-columns: 1fr 1fr; } .grid.four { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 560px) and (max-width: 719px) { .grid.four { grid-template-columns: 1fr 1fr; } }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.card p { color: var(--muted); margin: 0; }
.card .tag { font-family: var(--mono); font-size: .8rem; color: var(--accent); display: block; margin-bottom: 12px; }

.step { padding: 0; }
.step .num { font-family: var(--mono); font-size: .85rem; color: var(--accent); display: block; margin-bottom: 8px; }
.step p { color: var(--muted); margin: 0; font-size: .97rem; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.chips li { font-family: var(--mono); font-size: .85rem; border: 1px solid var(--line); background: var(--surface); padding: 6px 12px; border-radius: 999px; color: var(--ink); }

.contact-box { background: var(--accent-soft); border-radius: var(--radius); padding: 40px 28px; }
.contact-box .mail { font-size: clamp(1.3rem, 3vw, 1.8rem); font-weight: 650; word-break: break-all; }

/* Legal pages */
.doc { padding: 56px 0 72px; max-width: 760px; }
.doc h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); }
.doc h2 { font-size: 1.35rem; margin-top: 2.2em; }
.doc h3 { font-size: 1.05rem; margin-top: 1.6em; }
.doc ul { padding-left: 1.2em; }
.doc li { margin-bottom: .4em; }
.doc .meta { color: var(--muted); font-size: .95rem; }
.lang-switch { font-size: .95rem; margin-bottom: 24px; }
.toc { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 24px; background: var(--surface); }
.toc ul { margin: 0; }
dl.id { display: grid; grid-template-columns: 1fr; gap: 2px 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 24px; }
dl.id dt { color: var(--muted); font-size: .9rem; margin-top: 10px; }
dl.id dt:first-child { margin-top: 0; }
dl.id dd { margin: 0; font-weight: 550; }
@media (min-width: 560px) {
  dl.id { grid-template-columns: 220px 1fr; }
  dl.id dt, dl.id dt:first-child { margin-top: 0; }
  dl.id dt, dl.id dd { padding: 6px 0; }
}

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0 40px; font-size: .9rem; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--ink); }
.site-footer .links { display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 720px) {
  .br-lg { display: none; }
  .hero { padding-top: 56px; padding-bottom: 48px; }
  section { padding: 56px 0; }
}