:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #f1f3f6;
  --line: #e3e7ec;
  --text: #0f172a;
  --muted: #5b6474;
  --brand: #0d7a5f;
  --brand-dark: #095c48;
  --brand-soft: #e5f4ef;
  --ok: #15803d;
  --ok-soft: #e8f6ec;
  --warn: #b45309;
  --warn-soft: #fdf3e2;
  --bad: #b91c1c;
  --bad-soft: #fdecec;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 8px 24px rgba(15, 23, 42, .06);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #151b23;
    --surface-2: #1c232d;
    --line: #2a323d;
    --text: #e8edf3;
    --muted: #9aa5b4;
    --brand: #34c79b;
    --brand-dark: #5fd8b2;
    --brand-soft: #12302a;
    --ok: #4ade80;
    --ok-soft: #12291b;
    --warn: #fbbf24;
    --warn-soft: #2e2512;
    --bad: #f87171;
    --bad-soft: #321616;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.6 var(--font); }
a { color: var(--brand); }
a:hover { color: var(--brand-dark); }
img, svg { max-width: 100%; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 720px; }

/* Header / footer */
.site-head { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.1rem; color: var(--text); text-decoration: none; letter-spacing: -.01em; }
.logo svg { width: 28px; height: 28px; flex: none; }
.logo b { font-weight: 800; }
.logo span { color: var(--brand); }
.site-nav { display: flex; gap: 18px; font-size: .95rem; }
.site-nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.site-nav a:hover { color: var(--text); }
.site-foot { border-top: 1px solid var(--line); margin-top: 64px; padding: 28px 0 40px; color: var(--muted); font-size: .9rem; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 10px; }
.site-foot a { color: var(--muted); }

/* Hero + checker */
.hero { padding: 48px 0 8px; text-align: center; }
.hero h1 { font-size: clamp(1.9rem, 5vw, 2.7rem); line-height: 1.15; margin: 0 0 12px; letter-spacing: -.02em; }
.hero p { color: var(--muted); font-size: 1.08rem; margin: 0 auto 26px; max-width: 600px; }
.checker { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 18px; max-width: 640px; margin: 0 auto; }
.checker form { display: flex; gap: 10px; }
.checker input {
  flex: 1; min-width: 0; font: 600 1.15rem var(--font); letter-spacing: .04em; padding: 14px 16px;
  border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface-2); color: var(--text);
}
.checker input:focus { outline: none; border-color: var(--brand); background: var(--surface); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; cursor: pointer;
  background: var(--brand); color: #fff; font: 700 1rem var(--font); padding: 14px 22px; border-radius: 12px; text-decoration: none;
}
@media (prefers-color-scheme: dark) { .btn { color: #06251c; } }
.btn:hover { background: var(--brand-dark); color: #fff; }
.btn.ghost { background: transparent; color: var(--brand); border: 1.5px solid var(--brand); }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.checker .small { margin: 10px 2px 0; font-size: .85rem; color: var(--muted); text-align: left; }
.trust { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 20px; margin: 18px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: .9rem; }
.trust li::before { content: "✓ "; color: var(--ok); font-weight: 700; }

/* Result */
.result { max-width: 640px; margin: 18px auto 0; text-align: left; }
.result[hidden] { display: none; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.verdict { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: 12px; margin-bottom: 16px; font-weight: 600; }
.verdict .icon { font-size: 1.3rem; line-height: 1.2; }
.verdict small { display: block; font-weight: 400; color: var(--muted); margin-top: 2px; }
.verdict.ok { background: var(--ok-soft); color: var(--ok); }
.verdict.warn { background: var(--warn-soft); color: var(--warn); }
.verdict.bad { background: var(--bad-soft); color: var(--bad); }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; margin: 0; }
.facts dt { color: var(--muted); font-size: .92rem; }
.facts dd { margin: 0; font-weight: 600; word-break: break-word; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .03em; }
.premium { margin-top: 16px; border: 1.5px dashed var(--line); border-radius: 12px; padding: 16px; }
.premium h3 { margin: 0 0 6px; font-size: 1.05rem; }
.premium ul { margin: 8px 0 12px; padding-left: 20px; color: var(--muted); }
.badge { display: inline-block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; padding: 3px 8px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); vertical-align: middle; margin-left: 6px; }

/* Content sections */
section { padding: 44px 0 0; }
h2 { font-size: 1.55rem; line-height: 1.25; margin: 0 0 14px; letter-spacing: -.01em; }
h3 { font-size: 1.15rem; margin: 22px 0 6px; }
.lead { color: var(--muted); margin-top: -6px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.grid .card h3 { margin-top: 0; }
.grid .card p { margin: 0; color: var(--muted); font-size: .97rem; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.steps li { counter-increment: s; position: relative; padding: 14px 16px 14px 56px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.steps li::before {
  content: counter(s); position: absolute; left: 14px; top: 13px; width: 28px; height: 28px; border-radius: 50%;
  background: var(--brand-soft); color: var(--brand); font-weight: 800; display: grid; place-items: center; font-size: .9rem;
}
.code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--surface-2); border: 1px solid var(--line); padding: 1px 6px; border-radius: 6px; font-size: .92em; }
details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 4px 16px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 650; padding: 12px 0; }
details p { margin: 0 0 14px; color: var(--muted); }
.local { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; background: var(--brand-soft); border-radius: var(--radius); padding: 20px; }
.local p { margin: 4px 0 0; color: var(--muted); }
.guide-list a { display: block; text-decoration: none; color: inherit; }
.guide-list a:hover .card { border-color: var(--brand); }

/* Article pages */
.article { padding-top: 36px; }
.article h1 { font-size: clamp(1.8rem, 4.5vw, 2.4rem); line-height: 1.2; margin: 0 0 10px; letter-spacing: -.02em; }
.article .meta { color: var(--muted); font-size: .9rem; margin-bottom: 26px; }
.article h2 { margin-top: 34px; }
.article li { margin-bottom: 6px; }
.callout { background: var(--brand-soft); border-radius: 12px; padding: 16px 18px; margin: 22px 0; }
.callout p { margin: 0; }
.cta-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 30px 0; text-align: center; box-shadow: var(--shadow); }
.cta-box p { margin: 0 0 12px; color: var(--muted); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .site-nav { gap: 14px; font-size: .9rem; }
  .site-nav .hide-sm { display: none; }
  .checker form { flex-direction: column; }
  .hero { padding-top: 32px; }
  .facts { grid-template-columns: 1fr; gap: 2px; }
  .facts dd { margin-bottom: 8px; }
}

/* Paid report */
.grade { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; font-size: .8rem; font-weight: 800; margin-right: 4px; }
.grade.ok { background: var(--ok-soft); color: var(--ok); }
.grade.bad { background: var(--bad-soft); color: var(--bad); }
.grade.warn { background: var(--warn-soft); color: var(--warn); }
.grade.na { background: var(--surface-2); color: var(--muted); }
.muted { color: var(--muted); }
.spinner { width: 22px; height: 22px; border: 3px solid var(--line); border-top-color: var(--brand); border-radius: 50%; animation: spin .8s linear infinite; display: inline-block; vertical-align: middle; margin-right: 8px; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }