/* ==========================================================================
   Bend Calculator / metalfolding.co.uk — shared guide-page stylesheet
   Colour/font variables pulled directly from the live homepage's inline
   <style> so these pages read as a seamless continuation of the site.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Roboto+Mono:wght@400;500&display=swap');

:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --card-2: #f7f8fa;
  --ink: #1a2230;
  --ink-mid: #414c5e;
  --ink-dim: #6e7889;
  --line: #e4e7ec;
  --line-soft: #eef0f3;
  --cop: #b5622c;
  --cop-deep: #8f4a1f;
  --cop-soft: #fbf0e8;
  --steel: #3a6a5f;
  --steel-soft: #eef5f2;
  --mono: 'Roboto Mono', ui-monospace, "SFMono-Regular", Consolas, monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 900px;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cop-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 22px;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.4px;
  color: var(--ink);
}
.brand span { color: var(--cop); }

.topnav {
  display: flex;
  gap: 22px;
  font-size: 14px;
  color: var(--ink-mid);
  flex-wrap: wrap;
}
.topnav a { color: var(--ink-mid); }
.topnav a:hover { color: var(--ink); text-decoration: none; }

.top-cta {
  background: var(--cop);
  color: #fff !important;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
}
.top-cta:hover { background: var(--cop-deep); text-decoration: none; }

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 44px 22px 80px;
}

.breadcrumb {
  font-size: 13px;
  color: var(--ink-dim);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--ink-dim); }
.breadcrumb a:hover { color: var(--ink-mid); }

.eyebrow {
  color: var(--cop);
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin: 0 0 12px;
}

h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.1px;
  margin: 0 0 18px;
  color: var(--ink);
}

.dek {
  font-size: 17.5px;
  color: var(--ink-mid);
  max-width: 68ch;
  margin: 0 0 8px;
}

.meta-row {
  display: flex;
  gap: 16px;
  align-items: center;
  color: var(--ink-dim);
  font-size: 13px;
  margin: 18px 0 32px;
  flex-wrap: wrap;
}
.meta-row .dot { opacity: 0.6; }

h2 {
  font-size: 25px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--ink);
  margin: 46px 0 16px;
}
h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 26px 0 10px;
}

p { margin: 0 0 16px; color: var(--ink-mid); font-size: 15.5px; line-height: 1.7; }
main li { color: var(--ink-mid); font-size: 15.5px; line-height: 1.7; }

ul, ol { padding-left: 22px; margin: 0 0 16px; }
li { margin-bottom: 8px; }

strong { color: var(--ink); font-weight: 600; }

code, .formula {
  font-family: var(--mono);
  background: var(--card-2);
  border: 1px solid var(--line);
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 0.92em;
  color: var(--cop-deep);
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  margin: 24px 0;
  box-shadow: 0 1px 2px rgba(26,34,48,.04);
}
.panel-label {
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.panel-label::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  background: var(--cop);
}

.formula-block {
  font-family: var(--mono);
  background: var(--card-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cop);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 14.5px;
  color: var(--ink);
  white-space: pre;
  margin: 16px 0;
}

.callout {
  border-left: 3px solid var(--cop);
  background: var(--cop-soft);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  margin: 24px 0;
}
.callout p:last-child { margin-bottom: 0; }
.callout.green { border-left-color: var(--steel); background: var(--steel-soft); }

/* Calculator CTA card */
.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--cop);
  border-radius: var(--radius);
  padding: 22px 26px;
  margin: 32px 0;
  box-shadow: 0 1px 2px rgba(26,34,48,.05), 0 8px 24px rgba(26,34,48,.04);
}
.cta-card h3 { margin: 0 0 6px; font-size: 17px; }
.cta-card p { margin: 0; color: var(--ink-mid); font-size: 14px; }
.cta-card .btn {
  background: var(--cop);
  color: #fff;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 14px;
  white-space: nowrap;
  flex-shrink: 0;
}
.cta-card .btn:hover { background: var(--cop-deep); text-decoration: none; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14.5px;
}
th, td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line-soft);
}
th {
  color: var(--ink-dim);
  text-transform: uppercase;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  font-weight: 700;
}
td { color: var(--ink-mid); }
td.num, th.num { font-family: var(--mono); text-align: right; }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.table-wrap table { margin: 0; }
.table-wrap th:first-child, .table-wrap td:first-child { padding-left: 18px; }

.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--steel);
  background: var(--steel-soft);
  border: 1px solid #bcd3cc;
  padding: 3px 9px;
  border-radius: 999px;
}
.badge.orange {
  color: var(--cop-deep);
  background: var(--cop-soft);
  border-color: #e8c4a6;
}

.faq-item {
  border-bottom: 1px solid var(--line-soft);
  padding: 20px 0;
}
.faq-item:last-child { border-bottom: none; }
.faq-q { font-weight: 700; margin: 0 0 8px; font-size: 16px; color: var(--ink); }
.faq-a { color: var(--ink-mid); margin: 0; }

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.guide-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  transition: border-color 0.15s ease;
}
.guide-card:hover { border-color: var(--cop); }
.guide-card a { color: var(--ink); font-weight: 600; display: block; margin-bottom: 4px; }
.guide-card a:hover { text-decoration: none; color: var(--cop-deep); }
.guide-card p { margin: 0; font-size: 13.5px; color: var(--ink-dim); }

.next-reads { margin: 56px 0 8px; }

footer {
  border-top: 1px solid var(--line);
  margin-top: 60px;
}
.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 22px 60px;
}
.footer-disclaimer {
  font-size: 13px;
  color: var(--ink-dim);
  max-width: 68ch;
  margin: 0 0 28px;
  line-height: 1.6;
}
.footer-heading {
  text-transform: uppercase;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  font-weight: 700;
  margin: 0 0 14px;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}
.footer-links a { color: var(--ink-mid); font-size: 14px; }
.footer-links a:hover { color: var(--cop-deep); }
.footer-copy { font-size: 13px; color: var(--ink-dim); }

@media (max-width: 720px) {
  .topnav { display: none; }
  .topbar-inner { padding: 0 18px; }
}

@media (max-width: 640px) {
  h1 { font-size: 29px; }
  h2 { font-size: 21px; }
  .panel, .cta-card { padding: 18px; }
  .cta-card { flex-direction: column; align-items: flex-start; }
  main { padding: 30px 18px 60px; }
}