/* homebrew-calcs — mobile-first, no frameworks, no dark patterns */
:root {
  --bg: #faf7f1;
  --card: #ffffff;
  --ink: #2b2620;
  --muted: #6f6455;
  --line: #e8dfd0;
  --accent: #b45309;
  --accent-dark: #92400e;
  --accent-soft: #fef6e8;
  --warn-bg: #fef3c7;
  --warn-ink: #7c2d12;
  --danger-bg: #fee2e2;
  --danger-ink: #991b1b;
  --ok-bg: #ecfdf5;
  --ok-ink: #065f46;
  --radius: 10px;
  --maxw: 46rem;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 1.05rem;
}

/* ---------- header / nav ---------- */
.site-header {
  background: var(--ink);
  color: #fff;
}
.site-header .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.9rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}
.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
}
.brand span { color: #fbbf24; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; }
.site-nav a {
  color: #e7e0d3;
  text-decoration: none;
  font-size: 0.95rem;
}
.site-nav a:hover { color: #fff; text-decoration: underline; }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1rem; }
main .wrap { padding-top: 1.25rem; padding-bottom: 2rem; }

h1 { font-size: 1.7rem; line-height: 1.25; margin: 0.4rem 0 0.75rem; }
h2 { font-size: 1.3rem; margin: 1.75rem 0 0.5rem; }
h3 { font-size: 1.1rem; margin: 1.25rem 0 0.4rem; }
p { margin: 0.6rem 0; }
.lede { font-size: 1.12rem; color: var(--muted); }
a { color: var(--accent-dark); }
a:hover { color: var(--accent); }

/* ---------- cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 1.25rem 0;
  box-shadow: 0 1px 3px rgba(43, 38, 32, 0.06);
}
.calc-grid {
  display: grid;
  gap: 1rem;
}
@media (min-width: 560px) {
  .calc-grid.two { grid-template-columns: 1fr 1fr; }
}

/* ---------- forms ---------- */
label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
}
.field { margin-bottom: 1rem; }
.field .hint { font-weight: 400; font-size: 0.85rem; color: var(--muted); display: block; margin-top: 0.2rem; }

input[type="number"], input[type="text"], select {
  width: 100%;
  padding: 0.7rem 0.8rem;
  font-size: 1.05rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  min-height: 48px; /* touch target */
}
input:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.8rem 1.6rem;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  min-height: 48px;
}
.btn:hover { background: var(--accent-dark); }

.unit-toggle { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; margin-bottom: 1rem; }
.unit-toggle button {
  border: none;
  background: #fff;
  padding: 0.55rem 1rem;
  font-size: 0.95rem;
  cursor: pointer;
  color: var(--muted);
  min-height: 44px;
}
.unit-toggle button[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
  font-weight: 700;
}

/* ---------- results ---------- */
.results {
  background: var(--accent-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-top: 1.25rem;
}
.results h2, .results h3 { margin-top: 0; }
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: 1px dashed var(--line);
}
.result-row:last-child { border-bottom: none; }
.result-label { color: var(--muted); }
.result-value { font-size: 1.35rem; font-weight: 700; white-space: nowrap; }
.result-value small { font-size: 0.85rem; font-weight: 400; color: var(--muted); }
.formula-note {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.75rem;
  border-top: 1px solid var(--line);
  padding-top: 0.6rem;
}
.formula-note code { font-size: 0.8rem; }

/* ---------- callouts ---------- */
.callout {
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin: 1.25rem 0;
  border: 1px solid;
}
.callout.warning { background: var(--warn-bg); border-color: #f5d67b; color: var(--warn-ink); }
.callout.danger { background: var(--danger-bg); border-color: #f5a3a3; color: var(--danger-ink); }
.callout.info { background: var(--ok-bg); border-color: #9fd8bd; color: var(--ok-ink); }
.callout strong:first-child { display: block; margin-bottom: 0.25rem; }
.callout p { margin: 0.4rem 0; font-size: 0.95rem; }

/* ---------- tool cards (index) ---------- */
.tool-cards { display: grid; gap: 1rem; margin: 1.5rem 0; }
@media (min-width: 560px) { .tool-cards { grid-template-columns: 1fr 1fr 1fr; } }
.tool-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  display: block;
}
.tool-card:hover { border-color: var(--accent); }
.tool-card h2 { font-size: 1.15rem; margin: 0 0 0.4rem; color: var(--accent-dark); }
.tool-card p { font-size: 0.92rem; color: var(--muted); margin: 0; }

/* ---------- guides ---------- */
.guide-list { list-style: none; padding: 0; margin: 1rem 0; }
.guide-list li { margin-bottom: 0.6rem; }
.checklist { list-style: none; padding: 0; }
.checklist li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.8rem 1rem 0.8rem 2.75rem;
  margin-bottom: 0.6rem;
  position: relative;
}
.checklist li::before {
  content: attr(data-n);
  position: absolute;
  left: 0.9rem; top: 0.8rem;
  background: var(--accent);
  color: #fff;
  width: 1.5rem; height: 1.5rem;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.checklist li strong { display: block; }

/* ---------- faq ---------- */
.faq { margin: 1rem 0; }
.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 0.6rem;
  padding: 0.8rem 1rem;
}
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { font-size: 0.95rem; color: var(--muted); }

/* ---------- gear / affiliate placeholder ---------- */
.gear {
  background: var(--card);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin: 1.75rem 0;
}
.gear h2 { font-size: 1.1rem; margin-top: 0; }
.gear ul { margin: 0.5rem 0; padding-left: 1.2rem; }
.gear li { margin-bottom: 0.35rem; }
.disclosure { font-size: 0.8rem; color: var(--muted); }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 2rem;
  padding: 1.5rem 0 2.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.site-footer .wrap { display: grid; gap: 0.75rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; }

/* ---------- misc ---------- */
.breadcrumb { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.25rem; }
.breadcrumb a { color: var(--muted); }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1rem 0;
}
table.data th, table.data td {
  text-align: left;
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--line);
}
table.data th { background: var(--accent-soft); }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}