:root {
  --bg: #f7f7f4;
  --surface: #ffffff;
  --ink: #17181c;
  --muted: #5d606b;
  --line: #e2e1da;
  --accent: #0f6b5c;
  --accent-soft: #d7ece6;
  --accent-ink: #ffffff;
  --warn: #9a3b00;
  --good: #1a7f37;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --surface: #1a1b1f;
    --ink: #ececea;
    --muted: #a3a5ad;
    --line: #2c2d33;
    --accent: #4cc3a6;
    --accent-soft: #1d3b35;
    --accent-ink: #0d1412;
    --warn: #f0a36b;
    --good: #57ab5a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 3px; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.small, small { font-size: .85rem; }

/* header */
header.top { padding: 40px 0 24px; border-bottom: 1px solid var(--line); }
.eyebrow { color: var(--accent); font-weight: 600; font-size: .82rem; letter-spacing: .05em; text-transform: uppercase; margin: 0 0 8px; }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 12px; }
.lead { color: var(--muted); font-size: 1.05rem; max-width: 72ch; margin: 0 0 18px; }
.presets { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
button {
  font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  border-radius: 999px; padding: 6px 14px;
}
button:hover { border-color: var(--accent); }
button.link { border: 0; background: none; padding: 0; color: var(--accent); text-decoration: underline; text-underline-offset: 3px; border-radius: 0; }

/* layout */
.layout { display: grid; gap: 24px; padding-top: 24px; padding-bottom: 24px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr) minmax(0, 440px); align-items: start; }
  .results { position: sticky; top: 16px; }
}

/* form */
.inputs { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); align-content: start; }
fieldset { margin: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 14px 16px 16px; min-width: 0; }
legend { font-weight: 650; padding: 0 6px; }
label { display: block; margin: 10px 0 0; font-size: .92rem; }
label small { display: block; color: var(--muted); margin-top: 3px; }
input[type=number], select {
  display: block; width: 100%; margin-top: 4px; font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 9px;
}
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
label.check { display: flex; gap: 8px; align-items: center; }
label.check input { width: 16px; height: 16px; accent-color: var(--accent); }
.model-note, #cacheNote { margin: 6px 0 0; font-size: .85rem; }
details.override { margin-top: 12px; font-size: .92rem; }
details.override summary { cursor: pointer; color: var(--accent); }
[hidden] { display: none !important; }

/* results */
.results { display: grid; gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; min-width: 0; }
.card h2 { font-size: 1.02rem; margin: 0 0 12px; }
.total { border-color: var(--accent); }
.total .label { margin: 0; color: var(--muted); font-size: .9rem; }
.big { font-size: clamp(2.2rem, 6vw, 3rem); font-weight: 750; letter-spacing: -.02em; margin: 2px 0 10px; font-variant-numeric: tabular-nums; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.stats div { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; min-width: 0; }
.stats span { display: block; font-size: .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.stats b { font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.shock { margin: 12px 0 0; padding: 10px 12px; border-left: 3px solid var(--warn); background: var(--bg); border-radius: 0 8px 8px 0; }
.shock b { color: var(--warn); }

.bars { display: grid; gap: 9px; }
.bar-label { display: flex; justify-content: space-between; gap: 10px; font-size: .9rem; }
.bar-label b { font-variant-numeric: tabular-nums; white-space: nowrap; }
.bar-label small { color: var(--muted); font-weight: 500; }
.track { height: 8px; background: var(--bg); border-radius: 99px; overflow: hidden; margin-top: 3px; }
.fill { height: 100%; background: var(--accent); opacity: .55; border-radius: 99px; }
.bar.top .fill { opacity: 1; }

.ideas { margin: 0; padding-left: 20px; display: grid; gap: 12px; }
.ideas li > div { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 10px; }
.ideas p { margin: 3px 0 4px; color: var(--muted); font-size: .9rem; }
.saves { color: var(--good); font-weight: 650; white-space: nowrap; font-variant-numeric: tabular-nums; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

/* explanations */
.explain { padding-top: 16px; padding-bottom: 24px; }
.explain h2 { font-size: 1.35rem; margin: 32px 0 12px; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid article { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.grid h3 { margin: 0 0 6px; font-size: 1rem; }
.grid p { margin: 0; color: var(--muted); font-size: .92rem; }
.callout { margin-top: 28px; background: var(--accent-soft); border-radius: var(--radius); padding: 20px 22px; }
.callout h2 { margin-top: 0; }
.callout ul { padding-left: 20px; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 10px; font-weight: 650; text-decoration: none; }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
code { font-size: .85em; background: var(--surface); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; }

.table { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: .8rem; }
th.n, td.n { text-align: right; font-variant-numeric: tabular-nums; }
tr:last-child td { border-bottom: 0; }
/* phones: the total follows you while you edit the form */
.mobile-total {
  position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 5; display: flex; gap: 10px; align-items: baseline;
  justify-content: center; flex-wrap: wrap; padding: 10px 14px; border-radius: 12px; text-decoration: none;
  background: var(--accent); color: var(--accent-ink); box-shadow: 0 6px 24px rgba(0, 0, 0, .25); font-size: .9rem;
}
.mobile-total b { font-size: 1.1rem; }
@media (min-width: 960px) { .mobile-total { display: none; } }
@media (max-width: 959px) { footer { padding-bottom: 90px !important; } }
footer { padding-top: 8px; padding-bottom: 40px; border-top: 1px solid var(--line); }