:root {
  --bg: #f7f8fa; --card: #ffffff; --text: #1d2330; --muted: #5d6677;
  --accent: #1f6feb; --accent-soft: #e8f0fe; --border: #e2e6ee; --good: #12805c;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11151c; --card: #1a2029; --text: #e6e9ef; --muted: #9aa4b5;
    --accent: #5b9dff; --accent-soft: #1d2b44; --border: #2a3240; --good: #3ccf91; }
}
* { 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); }
header.site { background: var(--card); border-bottom: 1px solid var(--border); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; }
.logo { font-weight: 700; 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; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }
main { padding: 24px 0 48px; }
h1 { font-size: 1.8rem; line-height: 1.25; margin: 8px 0 8px; }
h2 { font-size: 1.3rem; margin-top: 32px; }
.lead { color: var(--muted); margin-top: 0; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin: 20px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 4px; }
.hint { font-weight: 400; color: var(--muted); font-size: .82rem; }
input, select { width: 100%; padding: 10px 12px; font-size: 1rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text); }
input:focus, select:focus { outline: 2px solid var(--accent); border-color: transparent; }
.check { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; }
.check input { width: auto; margin-top: 5px; }
.result { background: var(--accent-soft); border-radius: 12px; padding: 18px 20px; margin-top: 18px; }
.big { font-size: 2rem; font-weight: 700; color: var(--good); line-height: 1.2; }
.big small { font-size: 1rem; color: var(--muted); font-weight: 400; }
table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: .95rem; }
td { padding: 7px 0; border-bottom: 1px solid var(--border); }
td:last-child { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.tot td { font-weight: 700; border-bottom: none; }
.warn { color: #b45309; font-size: .9rem; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.tile { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; text-decoration: none; color: var(--text); }
.tile:hover { border-color: var(--accent); }
.tile strong { display: block; font-size: 1.05rem; margin-bottom: 4px; }
.tile span { color: var(--muted); font-size: .92rem; }
.ad { min-height: 0; margin: 20px 0; }
details { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 600; }
footer { border-top: 1px solid var(--border); color: var(--muted); font-size: .85rem; padding: 20px 0 40px; }
footer a { color: var(--muted); margin-right: 14px; }
@media (max-width: 560px) { h1 { font-size: 1.45rem; } nav a { margin-left: 10px; } .big { font-size: 1.6rem; } }