/* CastLab shared styles — mobile-first, no framework. */
:root {
  --bg: #faf9f6;
  --panel: #ffffff;
  --ink: #2b2620;
  --muted: #6b6257;
  --line: #e2dccf;
  --accent: #6b5a2e;
  --accent-soft: #e8e2d5;
  --warn-bg: #fff5de;
  --warn-ink: #7a5200;
  --stop-bg: #fde8e4;
  --stop-ink: #8a1f0f;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1815;
    --panel: #23201c;
    --ink: #ece6da;
    --muted: #a89f90;
    --line: #3a352d;
    --accent: #d4bb7a;
    --accent-soft: #332d20;
    --warn-bg: #3a2e12;
    --warn-ink: #f0cf82;
    --stop-bg: #3f1a14;
    --stop-ink: #f5a393;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
}

.site {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: .25rem 1rem;
  padding: .75rem 1rem; border-bottom: 1px solid var(--line); background: var(--panel);
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.site nav { display: flex; flex-wrap: wrap; gap: .15rem .9rem; font-size: .9rem; }
.site nav a { color: var(--muted); text-decoration: none; }
.site nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }

main { max-width: 44rem; margin: 0 auto; padding: 1rem 1rem 3rem; }
h1 { font-size: 1.6rem; line-height: 1.2; margin: .75rem 0 .5rem; }
h2 { font-size: 1.1rem; margin: 1.75rem 0 .5rem; }
.why { color: var(--muted); margin: 0 0 1.25rem; }
a { color: var(--accent); }

/* Form */
.calc { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }
fieldset { border: 0; margin: 0 0 1rem; padding: 0; min-width: 0; }
fieldset:last-child { margin-bottom: 0; }
legend { font-weight: 600; margin-bottom: .4rem; padding: 0; }
.row { display: grid; grid-template-columns: 1fr; gap: .75rem; margin-bottom: .75rem; }
.row:last-child { margin-bottom: 0; }
label { display: block; font-size: .9rem; color: var(--muted); }
label > span.hint { display: block; font-size: .8rem; }
input, select {
  display: block; width: 100%; margin-top: .25rem;
  font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: .55rem .6rem;
  min-height: 2.75rem; /* touch target */
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.seg { display: flex; flex-wrap: wrap; gap: .4rem; }
.seg label {
  display: inline-flex; align-items: center; gap: .35rem; color: var(--ink);
  border: 1px solid var(--line); border-radius: 999px; padding: .4rem .85rem; cursor: pointer; min-height: 2.5rem;
}
.seg input { width: auto; min-height: 0; margin: 0; }
.seg label:has(input:checked) { background: var(--accent-soft); border-color: var(--accent); }
[hidden] { display: none !important; }

/* Results */
.results { margin-top: 1rem; }
.cards { display: grid; grid-template-columns: 1fr; gap: .75rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: .85rem 1rem; }
.card h3 { margin: 0 0 .25rem; font-size: .85rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.big { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.2; }
.sub { color: var(--muted); font-size: .9rem; font-variant-numeric: tabular-nums; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: .95rem; }
th, td { text-align: left; padding: .4rem .3rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: .85rem; }
td.n, th.n { text-align: right; }
.tablewrap { overflow-x: auto; }

.msg { border-radius: var(--radius); padding: .75rem 1rem; margin: .75rem 0 0; }
.msg.warn { background: var(--warn-bg); color: var(--warn-ink); }
.msg.stop { background: var(--stop-bg); color: var(--stop-ink); font-weight: 600; }
.msg.err { background: var(--stop-bg); color: var(--stop-ink); }
.carry { display: flex; flex-wrap: wrap; gap: .5rem 1rem; margin-top: .75rem; font-size: .95rem; }

/* Notes + safety */
.fn { padding-left: 1.25rem; color: var(--muted); font-size: .9rem; }
.fn li { margin-bottom: .4rem; }
sup a { text-decoration: none; }
.safety {
  margin-top: 2rem; border: 1px solid var(--line); border-left: 4px solid var(--stop-ink);
  border-radius: var(--radius); padding: .85rem 1rem; background: var(--panel); font-size: .9rem;
}
.safety h2 { margin: 0 0 .35rem; font-size: 1rem; }
.safety ul { margin: 0; padding-left: 1.2rem; }
footer.site-foot { max-width: 44rem; margin: 0 auto; padding: 0 1rem 2rem; color: var(--muted); font-size: .8rem; }

/* Hub */
.hub { list-style: none; padding: 0; display: grid; gap: .75rem; }
.hub a { display: block; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1rem; text-decoration: none; color: var(--ink); }
.hub a strong { display: block; color: var(--accent); }
.hub a span { color: var(--muted); font-size: .92rem; }

@media (min-width: 36rem) {
  .row.two { grid-template-columns: 1fr 1fr; }
  .row.three { grid-template-columns: 1fr 1fr 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 2rem; }
}