/* Gravel Order Calculator — mobile-first styles */
:root {
  --ink: #1f2937;
  --ink-soft: #4b5563;
  --bg: #faf8f4;
  --card: #ffffff;
  --accent: #b45309;
  --accent-dark: #92400e;
  --accent-soft: #fef3c7;
  --line: #e5e0d5;
  --good: #166534;
  --bad: #b91c1c;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 1rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 1rem; top: 1rem; background: var(--ink); color: #fff; padding: .5rem 1rem; border-radius: 8px; z-index: 99; }

/* Header */
.site-header { background: var(--ink); color: #fff; position: sticky; top: 0; z-index: 10; }
.header-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .4rem .8rem; padding: .7rem 1rem; }
.brand { color: #fff; text-decoration: none; display: flex; align-items: center; gap: .5rem; font-size: 1.05rem; }
.brand-mark { color: #e3b96f; font-size: 1.3rem; }
.brand strong { color: #e3b96f; }
.site-nav a { color: #d1d5db; text-decoration: none; margin-left: 1rem; font-size: .95rem; }
.site-nav a:hover { color: #fff; }

/* Hero + calculator */
.hero { padding: 1.75rem 0 1rem; }
.hero h1 { font-size: 2rem; margin: 0 0 .25rem; letter-spacing: -0.01em; }
.lede { font-size: 1.1rem; color: var(--ink-soft); margin: 0 0 1.25rem; }
.calc-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.25rem; box-shadow: 0 2px 10px rgba(31,41,55,.06);
}
.calc-card.slim { margin-top: 1rem; }
fieldset { border: 0; padding: 0; margin: 0 0 1.1rem; }
legend { font-weight: 700; margin-bottom: .5rem; padding: 0; }
.pills { display: flex; flex-wrap: wrap; gap: .5rem; }
.pill input { position: absolute; opacity: 0; }
.pill span {
  display: inline-block; padding: .55rem .9rem; border: 2px solid var(--line);
  border-radius: 999px; cursor: pointer; font-size: .95rem; background: #fff;
}
.pill input:checked + span { border-color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.pill input:focus-visible + span { outline: 3px solid var(--accent); outline-offset: 2px; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: .75rem; }
.grid-2 { display: grid; grid-template-columns: 1fr; gap: .75rem; }
@media (min-width: 560px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } .grid-2 { grid-template-columns: repeat(2, 1fr); } }
.field label { display: block; font-weight: 600; margin-bottom: .25rem; font-size: .95rem; }
.unit { font-weight: 400; color: var(--ink-soft); font-size: .85rem; }
.field input, .field select {
  width: 100%; padding: .7rem .8rem; font-size: 1.05rem; border: 2px solid var(--line);
  border-radius: 8px; background: #fff; color: var(--ink);
}
.field input:focus, .field select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.hint { font-size: .88rem; color: var(--ink-soft); margin: .4rem 0 0; }
.hidden { display: none; }
.pricing { margin: 0 0 1.1rem; border: 1px dashed var(--line); border-radius: 8px; padding: .7rem .9rem; }
.pricing summary { cursor: pointer; font-weight: 700; }
.pricing .opt { font-weight: 400; color: var(--ink-soft); font-size: .9rem; }
.pricing .grid-3 { margin-top: .75rem; }
.errors {
  background: #fef2f2; border: 1px solid #fecaca; color: var(--bad);
  border-radius: 8px; padding: .7rem .9rem; margin: 0 0 1rem; font-size: .95rem;
}
.errors ul { margin: .25rem 0 0; padding-left: 1.2rem; }
.btn-primary {
  display: block; width: 100%; padding: 1rem; font-size: 1.15rem; font-weight: 800;
  letter-spacing: .02em; text-transform: uppercase; color: #fff; background: var(--accent);
  border: 0; border-radius: 10px; cursor: pointer;
}
.btn-primary:hover { background: var(--accent-dark); }
.btn-primary:active { transform: translateY(1px); }
.btn-secondary {
  padding: .7rem 1.2rem; font-size: 1rem; font-weight: 600; color: var(--ink);
  background: #fff; border: 2px solid var(--line); border-radius: 8px; cursor: pointer;
}
.btn-secondary:hover { border-color: var(--accent); }

/* Results */
.results {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.25rem; margin-top: 1.25rem; box-shadow: 0 2px 10px rgba(31,41,55,.06);
}
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; color: var(--ink-soft); margin: 0; }
.order-hero { font-size: 1.7rem; margin: .25rem 0 1rem; }
.order-hero span { color: var(--accent-dark); }
.warnings { background: var(--accent-soft); border: 1px solid #fcd34d; border-radius: 8px; padding: .6rem .9rem; font-size: .92rem; }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; margin: 0 0 1rem; }
.result-grid > div { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: .6rem .8rem; }
.result-grid dt { font-size: .82rem; color: var(--ink-soft); }
.result-grid dd { margin: 0; font-size: 1.15rem; font-weight: 700; }
.result-grid .total { border-color: var(--accent); background: var(--accent-soft); }
.assumption { font-size: .92rem; background: #f3f4f6; border-radius: 8px; padding: .6rem .9rem; }
.disclaimer { font-size: .85rem; color: var(--ink-soft); }
.buy-compare { display: grid; grid-template-columns: 1fr; gap: .75rem; margin-bottom: .75rem; }
@media (min-width: 560px) { .buy-compare { grid-template-columns: 1fr 1fr; } }
.buy-card { border: 1px solid var(--line); border-radius: 8px; padding: .9rem; background: var(--bg); }
.buy-card h4 { margin: 0 0 .25rem; text-transform: uppercase; font-size: .85rem; letter-spacing: .05em; color: var(--ink-soft); }
.buy-figure { font-size: 1.4rem; font-weight: 800; margin: 0; }
.buy-cost { font-size: 1.05rem; font-weight: 600; margin: .1rem 0; }
.buy-note { font-size: .88rem; color: var(--ink-soft); margin: .25rem 0 0; }
.verdict { font-size: 1rem; border-left: 4px solid var(--accent); padding: .5rem .9rem; background: var(--accent-soft); border-radius: 0 8px 8px 0; }
.result-actions { display: flex; gap: .6rem; margin-top: 1rem; flex-wrap: wrap; }
.copied { color: var(--good); font-weight: 600; }

/* Sections */
.section { padding: 2rem 0; }
.section h2 { font-size: 1.5rem; margin: 0 0 .75rem; }
.prose p, .prose li { max-width: 65ch; }
.steps { padding-left: 1.3rem; }
.steps li { margin-bottom: .4rem; }
.density-table { border-collapse: collapse; margin: 1rem 0; width: 100%; max-width: 420px; }
.density-table caption { text-align: left; font-weight: 700; margin-bottom: .4rem; }
.density-table th, .density-table td { border: 1px solid var(--line); padding: .5rem .75rem; text-align: left; }
.density-table th { background: var(--bg); }
#faq details { border: 1px solid var(--line); border-radius: 8px; margin-bottom: .6rem; background: var(--card); }
#faq summary { cursor: pointer; padding: .8rem 1rem; font-weight: 600; }
#faq details p { padding: 0 1rem .9rem; margin: 0; }

/* Ad slots: hidden until an ad network fills them */
.ad-slot { display: none; }
.ad-slot.filled { display: block; margin: 1.5rem auto; text-align: center; }

/* Footer */
.site-footer { background: var(--ink); color: #d1d5db; padding: 1.75rem 0; margin-top: 1rem; }
.footer-inner nav { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: .75rem; }
.footer-inner a { color: #d1d5db; text-decoration: none; font-size: .95rem; }
.footer-inner a:hover { color: #fff; }
.fine { font-size: .85rem; margin: 0; }

/* Trust pages */
.page { padding: 2rem 0 3rem; }
.page h1 { font-size: 1.9rem; margin: 0 0 1rem; }

/* Print: results only */
@media print {
  .site-header, .site-footer, #calculator, .result-actions, .ad-slot,
  #supplier-quote, #how-it-works, #faq, .hero .lede, .hero h1 { display: none !important; }
  .results { box-shadow: none; border: 0; margin: 0; padding: 0; }
}