:root {
  --bg: #f7f4ee;
  --card: #ffffff;
  --text: #1f2a30;
  --text-soft: #52606a;
  --muted: #86929a;
  --accent: #1d5f7a;
  --accent-2: #b5562f;
  --tag-bg: #e4eef2;
  --border: #e3ddd2;
  --radius: 12px;
  --max: 1040px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-display: Georgia, 'Times New Roman', serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11181c;
    --card: #182227;
    --text: #e6ecef;
    --text-soft: #a9b6bd;
    --muted: #74838b;
    --accent: #6fb3cf;
    --accent-2: #e08a64;
    --tag-bg: #1f3540;
    --border: #26343b;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 var(--font);
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
}

.hero { padding: 72px 16px 40px; }

.brand {
  display: inline-block;
  text-decoration: none;
  margin: 0 0 12px;
  font-size: 14px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-2);
  font-weight: 600;
}

h1 {
  margin: 0 0 16px;
  font: 700 clamp(34px, 6vw, 52px)/1.1 var(--font-display);
}

.lead {
  margin: 0;
  max-width: 620px;
  font-size: 19px;
  color: var(--text-soft);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

@media (max-width: 800px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .hero { padding: 40px 16px 28px; }
}

.panel {
  margin: 0;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.field { display: block; margin: 0 0 22px; padding: 0; border: 0; }
.field:last-child { margin-bottom: 0; }

.label {
  display: block;
  margin: 0 0 8px;
  padding: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-soft);
}

#amount {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: 700 28px/1.2 var(--font);
}

#amount:focus, .seg input:focus-visible + span, .mode input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.seg {
  display: inline-flex;
  padding: 3px;
  border-radius: 10px;
  background: var(--tag-bg);
}

.seg label { cursor: pointer; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }

.seg span {
  display: block;
  padding: 7px 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-soft);
}

.seg input:checked + span {
  background: var(--card);
  color: var(--accent);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .12);
}

.mode {
  display: flex;
  gap: 12px;
  margin-bottom: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-soft);
}

.mode:has(input:checked) { border-color: var(--accent); background: var(--tag-bg); }
.mode input { margin: 3px 0 0; accent-color: var(--accent); flex: none; }
.mode b { display: block; margin-bottom: 2px; font-size: 16px; color: var(--text); }

.result .label { margin-bottom: 4px; }

.net {
  margin: 0;
  font: 700 clamp(38px, 7vw, 52px)/1.1 var(--font-display);
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.net small { font: 600 16px var(--font); color: var(--text-soft); }
.net-alt { margin: 6px 0 0; color: var(--text-soft); }

.warn {
  margin: 16px 0 0;
  padding: 10px 14px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent-2) 14%, transparent);
  font-size: 14px;
}

.breakdown {
  width: 100%;
  margin-top: 22px;
  border-collapse: collapse;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}

.breakdown th {
  padding: 0 0 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-align: right;
}

.breakdown td { padding: 9px 0; border-top: 1px solid var(--border); }
.breakdown td + td { text-align: right; padding-left: 12px; white-space: nowrap; }
.breakdown .total td { font-weight: 700; }

.facts { margin: 18px 0 0; display: grid; gap: 6px; font-size: 14px; }
.facts div { display: flex; justify-content: space-between; gap: 12px; }
.facts dt { color: var(--text-soft); }
.facts dd { margin: 0; font-variant-numeric: tabular-nums; }

.notes { padding-top: 40px; color: var(--text-soft); font-size: 15px; }
.notes h2 { margin: 0 0 12px; font: 700 24px/1.25 var(--font-display); color: var(--text); }
.notes ul { margin: 0; padding-left: 20px; max-width: 760px; }
.notes li { margin-bottom: 6px; }

.footer {
  padding: 48px 16px 40px;
  color: var(--muted);
  font-size: 14px;
}

.footer p { margin: 0; }
.footer a, .notfound a { color: var(--accent); }
.notfound { padding: 96px 16px; }