/* ---------- design tokens ---------- */
:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #14213d;
  --muted: #5b6b83;
  --border: #dfe6ef;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: #eaf1fe;
  --good: #15803d;
  --good-soft: #e9f7ee;
  --warn: #b45309;
  --shadow: 0 1px 3px rgba(20, 33, 61, 0.07), 0 6px 20px rgba(20, 33, 61, 0.05);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #121b2e;
    --text: #e6ecf5;
    --muted: #93a3ba;
    --border: #24324a;
    --accent: #6ea2ff;
    --accent-strong: #8ab4ff;
    --accent-soft: #1b2a47;
    --good: #4ade80;
    --good-soft: #12291b;
    --warn: #fbbf24;
    --shadow: none;
  }
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px; }
h1 { font-size: clamp(1.65rem, 4vw, 2.25rem); line-height: 1.2; margin: 0.6em 0 0.3em; letter-spacing: -0.02em; }
h2 { font-size: 1.35rem; margin-top: 2.2em; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; margin-top: 1.6em; }
p, li { color: var(--text); }
.lede { font-size: 1.08rem; color: var(--muted); margin-top: 0; max-width: 60ch; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--accent-soft); padding: 0.1em 0.35em; border-radius: 5px; font-size: 0.92em; }

/* ---------- header / footer ---------- */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; font-size: 1.08rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.site-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-nav a { color: var(--muted); font-weight: 600; font-size: 0.95rem; }
.site-nav a:hover { color: var(--accent); text-decoration: none; }
.site-footer { border-top: 1px solid var(--border); margin-top: 64px; padding: 28px 0 36px; font-size: 0.88rem; color: var(--muted); }
.site-footer .privacy-note { font-weight: 600; }
.footer-nav { display: flex; gap: 18px; margin: 10px 0; }
.footer-nav a { color: var(--muted); }
.disclaimer { font-size: 0.8rem; max-width: 70ch; }
.copyright { font-size: 0.8rem; }

/* ---------- calculator card ---------- */
.calc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin: 26px 0;
  box-shadow: var(--shadow);
}
.field-label { display: block; font-size: 0.8rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 5px; }
input[type="number"], input[type="time"], input[type="text"], select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  min-height: 44px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.field-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 14px; }
.check-row { display: flex; align-items: center; gap: 10px; margin: 12px 0; flex-wrap: wrap; }
.check-row input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--accent); }
.inline-num { width: 90px !important; min-height: 36px; padding: 6px 8px; }

/* time card grid */
.tc-head, .tc-row { display: grid; grid-template-columns: 52px 1fr 1fr 76px; gap: 8px; align-items: center; margin-bottom: 8px; }
.tc-head { font-size: 0.75rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.tc-day { font-weight: 600; font-size: 0.95rem; }

/* buttons */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 9px;
  padding: 11px 18px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--accent-strong); }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--border); }
.btn.ghost:hover { background: var(--accent-soft); }
.btn.small { padding: 7px 12px; font-size: 0.88rem; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

/* ---------- results ---------- */
.results {
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 18px 20px;
  margin-top: 18px;
}
.results h2, .results h3 { margin-top: 0; }
.result-line { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; border-bottom: 1px solid var(--border); font-size: 0.98rem; }
.result-line:last-child { border-bottom: 0; }
.result-line .value { font-weight: 700; font-variant-numeric: tabular-nums; }
.result-big { font-size: 1.7rem; font-weight: 800; color: var(--good); font-variant-numeric: tabular-nums; }
.result-label { color: var(--muted); font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.status-good { color: var(--good); font-weight: 700; }
.status-warn { color: var(--warn); font-weight: 700; }
.hidden { display: none !important; }

/* progress bar */
.bar { background: var(--border); border-radius: 99px; height: 12px; overflow: hidden; margin: 8px 0 4px; }
.bar-fill { background: linear-gradient(90deg, var(--accent), var(--good)); height: 100%; border-radius: 99px; transition: width 0.35s ease; }

/* ---------- data tables ---------- */
table.data { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.95rem; }
table.data th, table.data td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
table.data th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- FAQ ---------- */
details.faq { border-bottom: 1px solid var(--border); padding: 4px 0; }
details.faq summary { font-weight: 600; cursor: pointer; padding: 10px 0; list-style-position: outside; }
details.faq p { margin-top: 4px; color: var(--muted); }

/* ---------- homepage cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin: 28px 0; }
.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  color: var(--text);
}
.card:hover { border-color: var(--accent); text-decoration: none; }
.card h2 { margin: 0 0 6px; font-size: 1.12rem; color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: 0.93rem; }

/* ---------- chart ---------- */
.chart-box { margin-top: 16px; }
.chart-box svg { width: 100%; height: auto; display: block; }
.chart-caption { font-size: 0.82rem; color: var(--muted); margin-top: 6px; }

/* ---------- ads & affiliate ---------- */
.ad-box { margin: 26px 0; text-align: center; min-height: 120px; }
/* Collapse the box when Google explicitly reports no ad (pre-approval,
   consent declined, or no fill) so visitors never see an empty labeled gap. */
.ad-box:has(ins[data-ad-status="unfilled"]) { display: none; }
.ad-box .ad-label { display: block; font-size: 0.68rem; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.promo { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 10px; padding: 14px 18px; margin: 20px 0; }
.promo h3 { margin: 0 0 6px; font-size: 1.02rem; }
.promo ul { margin: 8px 0; padding-left: 20px; }
.promo li { margin: 6px 0; }
.aff-note { font-size: 0.78rem; color: var(--muted); margin: 10px 0 0; }

/* ---------- content area ---------- */
.content section { max-width: 72ch; }
.note {
  background: var(--good-soft);
  border-left: 4px solid var(--good);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.93rem;
}

/* ---------- print ---------- */
@media print {
  .site-header, .site-footer, .content, .btn-row, .no-print, .ad-box, .promo { display: none !important; }
  body { background: #fff; color: #000; }
  .calc, .results { box-shadow: none; border-color: #999; }
  a { color: #000; }
}

/* ---------- small screens ---------- */
@media (max-width: 560px) {
  .tc-head, .tc-row { grid-template-columns: 44px 1fr 1fr 64px; gap: 6px; }
  input[type="time"] { padding: 8px 6px; }
  .header-row { justify-content: center; }
}