:root {
  --bg: #f7f8fa; --surface: #ffffff; --text: #1a1f2b; --muted: #5b6478;
  --line: #e3e6ec; --accent: #1f6feb; --accent-ink: #ffffff;
  --good: #1a7f4b; --good-bg: #e8f6ee; --warn: #b4540a; --warn-bg: #fff4e5;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f131a; --surface: #171c25; --text: #e7eaf0; --muted: #9aa3b5;
    --line: #2a3140; --accent: #4c8dff; --accent-ink: #0b0f16;
    --good: #5fd39a; --good-bg: #123024; --warn: #f0a35e; --warn-bg: #33220f;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }

.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; justify-content: space-between; align-items: center; min-height: 60px; gap: 12px; flex-wrap: wrap; }
.logo { font-weight: 800; font-size: 1.15rem; text-decoration: none; color: var(--text); }
.logo span { color: var(--accent); }
nav a { margin-left: 16px; text-decoration: none; color: var(--muted); font-size: .95rem; }

.hero { padding: 40px 0 8px; }
h1 { font-size: clamp(1.7rem, 4.5vw, 2.5rem); line-height: 1.2; margin: 0 0 12px; }
.lead { font-size: 1.1rem; color: var(--muted); margin: 0; }
.affiliate-note { font-size: .85rem; color: var(--muted); border-left: 3px solid var(--line); padding-left: 10px; }

.calc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 20px 0; }
.controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.controls label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; font-size: .92rem; }
select, input[type=range] { width: 100%; font: inherit; }
select { padding: 8px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); }
output { font-weight: 400; color: var(--muted); }

.data-note { font-size: .88rem; color: var(--muted); margin: 16px 0 0; padding: 10px 12px; border-radius: 8px; background: var(--bg); }
.data-note.unverified { background: var(--warn-bg); color: var(--warn); }

.results { display: grid; gap: 14px; margin-top: 16px; }
.card { position: relative; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; background: var(--surface); }
.card.best { border-color: var(--good); box-shadow: 0 0 0 1px var(--good) inset; }
.badge { position: absolute; top: -11px; left: 16px; background: var(--good); color: var(--surface); font-size: .75rem; font-weight: 700; padding: 2px 10px; border-radius: 999px; }
.card-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.card h3 { margin: 0; font-size: 1.15rem; }
.plan { font-weight: 400; color: var(--muted); font-size: .95rem; }
.good { margin: 2px 0 0; color: var(--muted); font-size: .92rem; }
.price { text-align: right; }
.total { display: block; font-size: 1.6rem; font-weight: 800; }
.per { font-size: .82rem; color: var(--muted); }
.breakdown { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px 16px; margin: 14px 0; }
.breakdown div { font-size: .88rem; }
dt { color: var(--muted); } dd { margin: 0; font-weight: 600; }
.breakdown .warn dd { color: var(--warn); }
.cta { display: inline-block; background: var(--accent); color: var(--accent-ink); text-decoration: none; font-weight: 700; padding: 10px 18px; border-radius: 8px; }
.empty { color: var(--muted); }
.src { margin-left: 14px; font-size: .85rem; color: var(--muted); }
input[type=number] { width: 100%; font: inherit; padding: 8px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); }
.controls output { font-size: .8rem; }

.how { padding: 8px 0 32px; }
.how h2 { font-size: 1.3rem; }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .88rem; padding: 18px 0; }
.page { padding: 32px 0; max-width: 700px; }
@media (max-width: 520px) { .price { text-align: left; } nav a { margin: 0 12px 0 0; } }