:root {
  --bg: #f7f7fb;
  --surface: #ffffff;
  --text: #15151f;
  --muted: #5b5b70;
  --border: #e3e3ee;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0b14;
    --surface: #14141f;
    --text: #f2f2f7;
    --muted: #a3a3b8;
    --border: #262636;
    --accent: #818cf8;
    --accent-soft: #1c1c33;
  }
}
:root[data-theme="dark"] {
  --bg: #0b0b14;
  --surface: #14141f;
  --text: #f2f2f7;
  --muted: #a3a3b8;
  --border: #262636;
  --accent: #818cf8;
  --accent-soft: #1c1c33;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
}
a { color: var(--accent); }
header, main, footer { max-width: 860px; margin: 0 auto; padding: 0 16px; }
header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; padding-top: 20px; padding-bottom: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text);
  text-decoration: none; font-weight: 800; font-size: 1.15rem; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: .95rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
main { padding-bottom: 48px; }
h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.2; margin: 24px 0 8px; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; }
.lead { color: var(--muted); font-size: 1.1rem; max-width: 640px; }
.updated { color: var(--muted); font-size: .9rem; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 20px; margin: 16px 0;
}
.notice { background: var(--accent-soft); border-color: transparent; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid .card { margin: 0; }
.grid h3 { margin: 0 0 6px; font-size: 1rem; }
.grid p { margin: 0; color: var(--muted); font-size: .95rem; }
ul, ol { padding-left: 1.3em; }
li { margin: 4px 0; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
footer {
  border-top: 1px solid var(--border); padding-top: 20px; padding-bottom: 32px;
  color: var(--muted); font-size: .9rem;
  display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between;
}
footer nav a { color: var(--muted); }

/* Home: hero, steps, flow, FAQ */
.hero { padding: 24px 0 8px; }
.hero h1 { margin-top: 8px; }
.eyebrow { color: var(--accent); font-weight: 700; font-size: .85rem; letter-spacing: .06em; text-transform: uppercase; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0 8px; }
.btn { display: inline-block; padding: 12px 20px; border-radius: 12px; font-weight: 700; text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
section { margin-top: 48px; }
section > h2 { font-size: 1.5rem; margin-bottom: 4px; }
section > .sub { color: var(--muted); margin-top: 0; }
.steps { list-style: none; padding: 0; margin: 16px 0 0; counter-reset: s; display: grid; gap: 12px; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 36px 1fr; gap: 12px; align-items: start;
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; margin: 0; }
.steps li::before { content: counter(s); width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-weight: 800; }
.steps strong { display: block; }
.steps span { color: var(--muted); font-size: .95rem; }
.two { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin-top: 16px; }
.two .card { margin: 0; }
.two h3 { margin: 0 0 4px; }
.tag { display: inline-block; font-size: .75rem; font-weight: 700; color: var(--accent); background: var(--accent-soft);
  padding: 2px 8px; border-radius: 999px; margin-bottom: 8px; }
.flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 8px; margin: 20px 0 4px; }
.flow .node { flex: 1 1 140px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 14px; text-align: center; }
.flow .node b { display: block; }
.flow .node small { color: var(--muted); }
.flow .arrow { align-self: center; color: var(--muted); font-size: 1.3rem; }
@media (max-width: 640px) { .flow { flex-direction: column; } .flow .node { flex: 0 0 auto; } .flow .arrow { transform: rotate(90deg); } }
details { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 700; }
details p { color: var(--muted); margin: 8px 0 0; }