:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #0f1419;
  --muted: #536471;
  --line: #e7ecef;
  --accent: #1d9bf0;
  --accent-ink: #ffffff;
  --card: #f7f9f9;
  --ok: #0f7b3f;
  --err: #b42318;
  --radius: 16px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  --maxw: 900px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15202b;
    --fg: #e7e9ea;
    --muted: #8b98a5;
    --line: #2f3b43;
    --card: #1c2733;
    --ok: #6bd39a;
    --err: #ff9a90;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px 72px; }

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--fg);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
}

.brand img { width: 40px; height: 40px; }
.brand-sub { color: var(--muted); font-weight: 500; }

.site-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: .95rem;
  font-weight: 600;
}

.site-nav a:hover { color: var(--accent); }

.hero { padding: 56px 0 8px; text-align: center; }

.hero h1 { font-size: clamp(1.8rem, 5vw, 2.5rem); margin: 0 0 10px; line-height: 1.2; }

.hero p { color: var(--muted); max-width: 600px; margin: 0 auto 24px; }

.search { max-width: 520px; margin: 0 auto; }

.search label {
  display: block;
  font-size: .85rem;
  font-weight: 700;
  color: var(--muted);
  text-align: left;
  margin-bottom: 6px;
}

.search input {
  width: 100%;
  padding: 12px 16px;
  font: inherit;
  color: var(--fg);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.search input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.search-hint { color: var(--muted); font-size: .85rem; margin-top: 8px; }

.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
  margin-top: 32px;
}

.quick-card {
  display: block;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  text-decoration: none;
  color: var(--fg);
}

.quick-card:hover { border-color: var(--accent); }

.quick-card strong { display: block; margin-bottom: 4px; }

.quick-card span { color: var(--muted); font-size: .9rem; }

section { margin-top: 56px; }

h2 { font-size: 1.4rem; margin: 0 0 12px; }

h3 { font-size: 1.02rem; margin: 22px 0 6px; }

p, li { font-size: 1rem; }

ul, ol { padding-left: 1.3em; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 14px 0;
}

.note { color: var(--muted); font-size: .92rem; }

.table { overflow-x: auto; }

table { border-collapse: collapse; width: 100%; margin: 14px 0; }

th, td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; font-size: .95rem; }

th { background: var(--card); }

code, .mono {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--card);
  padding: .12em .4em;
  border-radius: 6px;
  word-break: break-all;
}

pre {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  font-size: .85rem;
}

pre code { background: none; padding: 0; }

details.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 10px 0;
  background: var(--card);
}

details.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

details.faq-item summary::-webkit-details-marker { display: none; }

details.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-weight: 600;
}

details.faq-item[open] summary::after { content: "\2212"; }

details.faq-item .answer { margin-top: 10px; }

.faq-empty { display: none; color: var(--muted); font-style: italic; }

form.contact {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

.field { display: grid; gap: 6px; }

.field label { font-weight: 700; font-size: .92rem; }

.field input, .field select, .field textarea {
  width: 100%;
  padding: 11px 13px;
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.field textarea { min-height: 150px; resize: vertical; }

.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 1px;
}

.field .hint { color: var(--muted); font-size: .82rem; }

.hp {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.btn {
  display: inline-block;
  justify-self: start;
  background: var(--accent);
  color: var(--accent-ink);
  border: 0;
  font: inherit;
  font-weight: 700;
  padding: 12px 26px;
  border-radius: 999px;
  cursor: pointer;
}

.btn:hover { filter: brightness(1.08); }

.btn:disabled { opacity: .65; cursor: progress; }

.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.form-status {
  min-height: 1.5em;
  margin: 0;
  font-size: .92rem;
  font-weight: 600;
}

.form-status[data-state="pending"] { color: var(--muted); }
.form-status[data-state="success"] { color: var(--ok); }
.form-status[data-state="error"] { color: var(--err); }
.form-status[data-state="fallback"] { color: var(--muted); }

footer {
  margin-top: 72px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
  text-align: center;
}

@media (max-width: 540px) {
  .site-header { justify-content: center; text-align: center; }
  .hero { padding-top: 36px; }
}

.flush-top { margin-top: 0; }