:root {
  --bg: #0f1420;
  --card: #171e2e;
  --border: #262f45;
  --text: #e8ecf5;
  --muted: #93a0b8;
  --accent: #4f8dfd;
  --accent-2: #34c98f;
  --radius: 14px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --border: #e2e7f0;
    --text: #16202f;
    --muted: #5b6779;
    --accent: #2f6fed;
    --accent-2: #1a9e6b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
}
.site-header .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px 0; }
.brand { color: var(--text); font-weight: 700; font-size: 1.2rem; text-decoration: none; }
.brand span { color: var(--accent); }
.site-header nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px 16px; }
.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  white-space: nowrap;
}
.site-header nav a:hover { color: var(--text); }

main.wrap { padding: 40px 20px 60px; }

h1 { font-size: 2rem; margin-bottom: 8px; }
.lede { color: var(--muted); margin-top: 0; margin-bottom: 32px; max-width: 56ch; }

.calc-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 40px;
}

.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 6px;
}
.field input, .field select {
  width: 100%;
  padding: 12px 14px;
  font-size: 1.05rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}
.field-row { display: flex; gap: 16px; }
.field-row .field { flex: 1; }

button#calcBtn {
  width: 100%;
  padding: 14px;
  font-size: 1.05rem;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  cursor: pointer;
}
button#calcBtn:hover { filter: brightness(1.08); }

.result { margin-top: 28px; border-top: 1px solid var(--border); padding-top: 24px; }
.result-main { text-align: center; margin-bottom: 20px; }
.result-label { display: block; color: var(--muted); font-size: 0.9rem; }
.result-value { display: block; font-size: 2.4rem; font-weight: 700; color: var(--accent-2); }

table.breakdown { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
table.breakdown td { padding: 8px 0; border-bottom: 1px solid var(--border); }
table.breakdown td:last-child { text-align: right; font-variant-numeric: tabular-nums; }
table.breakdown tr.total-row td { font-weight: 700; border-top: 1px solid var(--border); border-bottom: none; }

.info h2 { font-size: 1.3rem; }
.bracket-table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.92rem; }
.bracket-table th, .bracket-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.disclaimer { color: var(--muted); font-size: 0.88rem; }
.disclaimer a { color: var(--accent); }

.more-calcs { margin-top: 8px; }
.more-calcs h2 { font-size: 1.3rem; }
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}
.calc-card-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease;
}
.calc-card-link:hover { border-color: var(--accent); }
.calc-card-link strong { font-size: 1rem; }
.calc-card-link span { color: var(--muted); font-size: 0.87rem; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 0.88rem;
}
.site-footer .wrap { display: flex; justify-content: space-between; }
.site-footer a { color: var(--muted); }

@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  main.wrap { padding: 24px 16px 48px; }

  .site-header { padding: 14px 0; }
  .site-header .wrap { justify-content: center; text-align: center; }
  .brand { font-size: 1.1rem; }
  .site-header nav { justify-content: center; gap: 4px 12px; }
  .site-header nav a { font-size: 0.85rem; }

  h1 { font-size: 1.5rem; }
  .lede { font-size: 0.95rem; margin-bottom: 24px; }

  .calc-card { padding: 16px; border-radius: 12px; margin-bottom: 28px; }

  .field-row { flex-direction: column; gap: 0; }
  .field input, .field select { font-size: 16px; padding: 13px 14px; } /* 16px prevents iOS auto-zoom on focus */

  button#calcBtn { padding: 15px; font-size: 1rem; }

  .result-value { font-size: 1.7rem; }
  table.breakdown, .bracket-table { font-size: 0.85rem; }
  table.breakdown td, .bracket-table td, .bracket-table th { padding: 7px 4px; }

  .calc-grid { grid-template-columns: 1fr; }

  .site-footer .wrap { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 380px) {
  .site-header nav a { font-size: 0.78rem; }
  .result-value { font-size: 1.5rem; }
}