:root { --bg: #fbfaf7; --fg: #1d1d1b; --muted: #5d5b55; --line: #dedad2; --accent: #1f5f8b; --warn-bg: #fff6e0; --warn-line: #e3c46b; --card: #ffffff; }
@media (prefers-color-scheme: dark) { :root { --bg: #161615; --fg: #ecebe7; --muted: #a8a59d; --line: #34332f; --accent: #7fb8e0; --warn-bg: #2b2414; --warn-line: #7a6427; --card: #1e1e1c; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main, header, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 20px; }
header nav a { margin-right: 14px; color: var(--accent); text-decoration: none; font-size: 15px; }
h1 { font-size: 30px; line-height: 1.2; margin: 18px 0 6px; }
h2 { font-size: 20px; margin: 28px 0 8px; }
p.lead { color: var(--muted); margin-top: 0; }
.notice { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 8px; padding: 10px 14px; font-size: 14px; }
form, .card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin: 16px 0; }
label { display: block; font-weight: 600; margin: 10px 0 4px; }
input, select { font: inherit; width: 100%; max-width: 280px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); }
.row { display: flex; flex-wrap: wrap; gap: 0 24px; }
.out { font-size: 22px; font-weight: 700; margin: 8px 0 2px; }
.sub { color: var(--muted); font-size: 14px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; font-variant-numeric: tabular-nums; }
th, td { text-align: right; padding: 6px 8px; border-bottom: 1px solid var(--line); }
th:first-child, td:first-child { text-align: left; }
tr.best td { font-weight: 700; }
.faq dt { font-weight: 700; margin-top: 14px; }
.faq dd { margin: 4px 0 0; }
footer { color: var(--muted); font-size: 13px; padding: 30px 16px 40px; }
a { color: var(--accent); }

.cta { border: 2px solid var(--accent); }
.cta h2 { margin-top: 0; }