/* =========================================================================
   TruckCPM — shared styles
   Mobile-first: thumb-size inputs, sticky bottom result bar for in-cab use.
   ========================================================================= */
:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --ink: #19212b;
  --ink-soft: #4d5a6a;
  --ink-faint: #66707c;
  --line: #dfe4ea;
  --navy: #122033;
  --navy-2: #1b2f49;
  --amber: #f5a623;
  --amber-deep: #c97f06;
  /* --amber-text: WCAG AA on white (4.56:1). Use this for any amber TEXT or
     small icons on light backgrounds. Keep --amber for fills/accents on navy. */
  --amber-text: #9c6a16;
  --green: #1e7d43;
  --green-bg: #e7f5ec;
  --red: #b3261e;
  --red-bg: #fbecea;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(18, 32, 51, .08), 0 4px 16px rgba(18, 32, 51, .06);
  --max: 760px;
}

* { box-sizing: border-box; }
:focus-visible {
  outline: 3px solid var(--amber-text);
  outline-offset: 2px;
  border-radius: 4px;
}
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
}
body.has-sticky-bar { padding-bottom: 92px; }

img, svg { max-width: 100%; height: auto; }
a { color: #145a9e; }
a:hover { color: #0d3f70; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--amber); color: var(--navy); padding: .5rem 1rem;
  z-index: 100; border-radius: 0 0 8px 0; font-weight: 700;
}
.skip-link:focus { left: 0; }

/* ---------- header / nav ---------- */
.site-header {
  background: var(--navy);
  color: #fff;
  padding: .65rem 1rem;
}
.site-header .inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; gap: .75rem; flex-wrap: wrap;
}
.brand {
  display: flex; align-items: center; gap: .5rem;
  color: #fff; text-decoration: none; font-weight: 800; font-size: 1.05rem;
  letter-spacing: .2px;
}
.brand .cpm { color: var(--amber); }
.brand svg { width: 26px; height: 26px; flex: none; }
.site-nav { margin-left: auto; display: flex; gap: .25rem .9rem; flex-wrap: wrap; }
.site-nav a {
  color: #cdd8e4; text-decoration: none; font-size: .85rem; font-weight: 600;
  padding: .25rem 0;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--amber); }

/* ---------- layout ---------- */
main { max-width: var(--max); margin: 0 auto; padding: 1.25rem 1rem 2.5rem; }
.hero { padding: .5rem 0 .25rem; }
.hero h1 { font-size: 1.65rem; line-height: 1.2; margin: .25rem 0 .5rem; letter-spacing: -.3px; }
.hero .lede { color: var(--ink-soft); font-size: 1.02rem; margin: 0 0 .5rem; }
.hero .meta-line { color: var(--ink-faint); font-size: .82rem; margin: 0; }
@media (min-width: 700px) { .hero h1 { font-size: 2.1rem; } }

article.prose h2 { font-size: 1.35rem; margin: 2rem 0 .6rem; letter-spacing: -.2px; }
article.prose h3 { font-size: 1.1rem; margin: 1.4rem 0 .4rem; }
article.prose p, article.prose li { color: #28303b; }
article.prose ul, article.prose ol { padding-left: 1.3rem; }
article.prose table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .95rem; }
article.prose th, article.prose td { border: 1px solid var(--line); padding: .5rem .65rem; text-align: left; }
article.prose th { background: #eef1f5; }
article.prose td.num, article.prose th.num { text-align: right; font-variant-numeric: tabular-nums; }
blockquote { margin: 1rem 0; padding: .6rem 1rem; border-left: 4px solid var(--amber); background: #fff8ec; border-radius: 0 8px 8px 0; }

/* ---------- calculator form ---------- */
.calc-form { margin: 1rem 0 0; }
.calc-group {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  margin: 0 0 .9rem; overflow: hidden;
}
.calc-group summary {
  display: flex; align-items: baseline; gap: .6rem;
  cursor: pointer; list-style: none;
  padding: .85rem 1rem; user-select: none;
}
.calc-group summary::-webkit-details-marker { display: none; }
.calc-group summary::after {
  content: "▾"; margin-left: auto; color: var(--ink-faint);
  transition: transform .15s ease;
}
.calc-group:not([open]) summary::after { transform: rotate(-90deg); }
.group-title { font-weight: 800; font-size: 1rem; }
.group-sub { color: var(--amber-text); font-weight: 700; font-size: .85rem; font-variant-numeric: tabular-nums; }
.group-note { margin: 0; padding: 0 1rem .25rem; color: var(--ink-faint); font-size: .84rem; }

.field-grid { display: grid; grid-template-columns: 1fr; gap: .25rem; padding: .35rem .65rem .8rem; }
@media (min-width: 560px) { .field-grid { grid-template-columns: 1fr 1fr; gap: .25rem .75rem; } }

.field { padding: .45rem .35rem; border-radius: 8px; }
.field label { display: flex; justify-content: space-between; align-items: baseline; gap: .5rem; margin-bottom: .3rem; }
.label-text { font-weight: 600; font-size: .9rem; }
.label-unit { color: var(--ink-faint); font-size: .78rem; white-space: nowrap; }
.field input[type="number"] {
  width: 100%;
  font-size: 1.15rem; font-weight: 700; font-variant-numeric: tabular-nums;
  padding: .7rem .75rem;            /* thumb-size target ≥44px tall */
  border: 1.5px solid var(--line); border-radius: 10px;
  background: #fbfcfd; color: var(--ink);
  -moz-appearance: textfield; appearance: textfield;
}
.field input[type="number"]:focus {
  outline: none; border-color: var(--amber); box-shadow: 0 0 0 3px rgba(245, 166, 35, .25);
}
.field input[type="range"] { width: 100%; margin-top: .55rem; accent-color: var(--amber); height: 28px; }
.hint { margin: .3rem 0 0; font-size: .78rem; color: var(--ink-faint); }
.field-flash { animation: flash 2.4s ease; }
@keyframes flash {
  0%, 60% { background: #fff3da; box-shadow: inset 0 0 0 2px var(--amber); }
  100% { background: transparent; box-shadow: none; }
}

.calc-actions { display: flex; gap: .6rem; flex-wrap: wrap; margin: .25rem 0 .5rem; }
.btn {
  display: inline-block; border: none; cursor: pointer; text-decoration: none;
  font-weight: 700; font-size: .95rem; border-radius: 10px;
  padding: .75rem 1.1rem; min-height: 44px;
}
.btn-secondary { background: var(--navy); color: #fff; }
.btn-secondary:hover { background: var(--navy-2); }
.btn-ghost { background: transparent; color: var(--ink-soft); border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: var(--ink-faint); }
.btn-partner { background: var(--amber); color: var(--navy); margin: .25rem .4rem .25rem 0; }
.btn-partner:hover { background: #ffb43a; color: var(--navy); }
.defaults-note { font-size: .8rem; color: var(--ink-faint); margin: .25rem 0 0; }

/* ---------- results ---------- */
.results { margin-top: 1.5rem; }
.results h2 { font-size: 1.3rem; margin: 0 0 .75rem; }
.result-cards { display: grid; grid-template-columns: 1fr; gap: .7rem; }
@media (min-width: 560px) { .result-cards { grid-template-columns: repeat(3, 1fr); } }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: .9rem 1rem; display: flex; flex-direction: column; gap: .15rem;
}
.card-label { font-size: .8rem; font-weight: 700; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .4px; }
.card-value { font-size: 1.9rem; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: -.5px; }
.card-sub { font-size: .8rem; color: var(--ink-faint); }
.card-primary { background: var(--navy); border-color: var(--navy); }
.card-primary .card-label { color: #9fb0c3; }
.card-primary .card-value { color: var(--amber); }
.card-primary .card-sub { color: #9fb0c3; }
.card-accent .card-value { color: var(--amber-text); }

.result-detail { margin-top: 1rem; }
.detail-table {
  width: 100%; border-collapse: collapse; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); font-size: .95rem;
}
.detail-table td { padding: .55rem .9rem; border-bottom: 1px solid var(--line); }
.detail-table tr:last-child td { border-bottom: none; }
.detail-table td.num { text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; }
.deadhead-note { font-size: .88rem; color: var(--ink-soft); background: #fff8ec; border-left: 4px solid var(--amber); padding: .6rem .8rem; border-radius: 0 8px 8px 0; }

.verdict { border-radius: var(--radius); padding: .9rem 1rem; margin-top: 1rem; }
.verdict p { margin: .35rem 0 0; font-size: .95rem; }
.verdict-good { background: var(--green-bg); border: 1px solid #bfe3cc; color: #14532d; }
.verdict-bad { background: var(--red-bg); border: 1px solid #f0c4c0; color: #7f1d1d; }

.gap-panel {
  margin-top: 1rem; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
  color: #e6edf5; padding: 1.1rem 1.2rem; box-shadow: var(--shadow);
}
.gap-panel h3 { margin: 0 0 .4rem; color: var(--amber); font-size: 1.08rem; }
.gap-panel p { margin: .3rem 0; font-size: .92rem; color: #c6d2df; }
.gap-links { margin: .75rem 0 .25rem; display: flex; flex-wrap: wrap; }
.disclosure { font-size: .76rem !important; color: #93a3b5 !important; }

/* ---------- sticky result bar ---------- */
.sticky-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  display: grid; grid-template-columns: repeat(3, 1fr);
  background: var(--navy);
  border-top: 3px solid var(--amber);
  padding: .55rem .5rem calc(.55rem + env(safe-area-inset-bottom));
  cursor: pointer;
  box-shadow: 0 -4px 18px rgba(18, 32, 51, .35);
}
.sb-cell { display: flex; flex-direction: column; align-items: center; gap: .05rem; min-width: 0; }
.sb-num { color: var(--amber); font-size: 1.35rem; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: -.5px; }
.sb-label { color: #9fb0c3; font-size: .64rem; font-weight: 700; text-transform: uppercase; letter-spacing: .4px; text-align: center; }
.sticky-bar .sb-cell:first-child .sb-num { font-size: 1.55rem; }
@media (min-width: 700px) {
  .sticky-bar { max-width: var(--max); margin: 0 auto; border-radius: 14px 14px 0 0; }
  .sb-num { font-size: 1.5rem; }
}

/* ---------- source chip (shown beside results) ---------- */
.source-chip {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .75rem; font-weight: 600; color: var(--amber-text);
  background: #fff8ec; border: 1px solid #f5dfa0;
  border-radius: 999px; padding: .25rem .65rem;
  text-decoration: none; white-space: nowrap;
}
.source-chip:hover { background: #fef3d5; }
.source-chip:focus-visible { outline-color: var(--amber-text); }
.source-chip-row { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .65rem; }

/* ---------- offline badge ---------- */
.offline-badge {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .82rem; color: var(--ink-soft);
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 999px; padding: .25rem .75rem .25rem .55rem;
  margin: .35rem 0;
}
.offline-badge::before {
  content: ""; display: inline-block;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green); flex: none;
}

/* ---------- FAQ ---------- */
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; margin: .5rem 0; padding: 0; }
.faq summary { font-weight: 700; cursor: pointer; padding: .8rem 1rem; }
.faq details p { padding: 0 1rem .8rem; margin: 0; color: #28303b; }

/* ---------- callouts & link cards ---------- */
.callout {
  background: var(--surface); border: 1px solid var(--line); border-left: 5px solid var(--amber);
  border-radius: 10px; padding: .8rem 1rem; margin: 1rem 0; font-size: .95rem;
}
.tool-links { display: grid; grid-template-columns: 1fr; gap: .6rem; margin: 1rem 0; padding: 0; list-style: none; }
@media (min-width: 560px) { .tool-links { grid-template-columns: 1fr 1fr; } }
.tool-links a {
  display: block; background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: .8rem 1rem; text-decoration: none;
  font-weight: 700; color: var(--navy); box-shadow: var(--shadow);
}
.tool-links a:hover { border-color: var(--amber); }
.tool-links .sub { display: block; font-weight: 400; font-size: .83rem; color: var(--ink-faint); margin-top: .15rem; }

.expense-item td a { font-weight: 600; }

/* ---------- footer ---------- */
.site-footer {
  background: var(--navy); color: #9fb0c3;
  margin-top: 2rem; padding: 1.5rem 1rem 2rem; font-size: .84rem;
}
body.has-sticky-bar .site-footer { padding-bottom: 6rem; }
.site-footer .inner { max-width: var(--max); margin: 0 auto; }
.site-footer a { color: #cdd8e4; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; margin-bottom: .9rem; }
.site-footer nav a { text-decoration: none; font-weight: 600; }
.site-footer nav a:hover { color: var(--amber); }
.site-footer .fine { margin: .35rem 0; line-height: 1.5; }

/* ---------- 404 ---------- */
.page-404 { text-align: center; padding: 4rem 1rem; }
.page-404 .big { font-size: 5rem; font-weight: 800; color: var(--navy); margin: 0; }

/* ---------- print: hide chrome, show numbers ---------- */
@media print {
  .site-header, .site-footer, .sticky-bar, .calc-actions, .gap-panel { display: none !important; }
  body { background: #fff; padding-bottom: 0; }
}