:root {
  --bg: #f6f3ec;
  --surface: #ffffff;
  --ink: #1f2a22;
  --muted: #5d6a60;
  --line: #e2dccf;
  --green: #2f5d3a;
  --green-dark: #22442a;
  --wood: #b7793a;
  --wood-light: #f3e6d4;
  --radius: 12px;
  --shadow: 0 8px 26px rgba(31, 42, 34, 0.08);
  --serif: 'Bitter', Georgia, serif;
  --sans: 'Source Sans 3', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 18px/1.6 var(--sans); }
img, svg, canvas { max-width: 100%; }
a { color: var(--green); }
h1, h2, h3 { font-family: var(--serif); line-height: 1.2; color: var(--green-dark); }
h1 { font-size: clamp(2rem, 5vw, 3rem); margin: 0.2em 0 0.4em; }
h2 { font-size: clamp(1.4rem, 3vw, 1.85rem); margin: 1.5em 0 0.5em; }
h3 { font-size: 1.15rem; margin: 1.2em 0 0.3em; }
main { padding: 0 16px 48px; }
.muted { color: var(--muted); }
.small { font-size: 0.88rem; }
.lead { font-size: 1.15rem; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.8rem; font-weight: 600; color: var(--wood); margin: 0; }

.site-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; max-width: 1180px; margin: 0 auto; padding: 14px 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--green-dark); font-family: var(--serif); font-weight: 700; font-size: 1.2rem; }
.logo { width: 30px; height: 30px; color: var(--green); }
.site-header nav { display: flex; gap: 16px; flex-wrap: wrap; justify-content: end; }
.site-header nav a { text-decoration: none; font-weight: 600; font-size: 0.95rem; }
@media (max-width: 520px) { .site-header nav a:first-child { display: none; } }

.site-footer { border-top: 1px solid var(--line); padding: 28px 16px 40px; color: var(--muted); font-size: 0.85rem; }
.site-footer > * { max-width: 1180px; margin-left: auto; margin-right: auto; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-bottom: 14px; }
.site-footer nav a { color: var(--muted); }
.cb-disclaimer { font-size: 0.78rem; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.narrow { max-width: 680px; margin: 24px auto; }
.prose { max-width: 720px; margin-left: auto; margin-right: auto; }
.stack { display: grid; gap: 14px; }
.notice { background: var(--wood-light); border-radius: 10px; padding: 12px 14px; }
.error { background: #fbeaea; color: #8a2d26; border-radius: 10px; padding: 10px 14px; }

.btn { display: inline-block; background: var(--green); color: #fff; border: 0; border-radius: 10px; padding: 12px 20px; font: 600 1rem var(--sans); text-decoration: none; cursor: pointer; text-align: center; }
.btn:hover { background: var(--green-dark); }
.btn-large { font-size: 1.12rem; padding: 16px 26px; width: 100%; }
.btn-secondary { background: transparent; color: var(--green); border: 1.5px solid var(--green); }
.btn-secondary:hover { background: var(--wood-light); }
.btn-small { padding: 7px 12px; font-size: 0.9rem; }

label { display: grid; gap: 6px; font-weight: 600; font-size: 0.95rem; }
input, select { font: inherit; padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 9px; background: #fff; width: 100%; min-height: 46px; }
input:focus, select:focus { outline: 2px solid var(--wood); outline-offset: 1px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hint { font-size: 0.85rem; color: var(--muted); margin: -2px 0 0; font-weight: 400; }

/* Landing & calculator */
.hero { max-width: 1180px; margin: 16px auto 0; display: grid; gap: 28px; align-items: start; }
.ticks { padding: 0; list-style: none; display: grid; gap: 8px; }
.ticks li::before { content: '✓'; color: var(--green); font-weight: 700; margin-right: 10px; }
@media (min-width: 920px) { .hero { grid-template-columns: 1.1fr 1fr; margin-top: 36px; } }
.feature-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); max-width: 1180px; margin: 32px auto; }
.feature-grid > div { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.feature-grid h3 { margin-top: 0; }
.calc { display: grid; gap: 14px; }
.results { margin-top: 18px; }
.totals { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.totals div { background: var(--wood-light); border-radius: 10px; padding: 10px 12px; }
.totals strong { display: block; font-family: var(--serif); font-size: 1.4rem; color: var(--green-dark); }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.85rem; color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
.offer { max-width: 560px; margin: 32px auto; text-align: center; border: 2px solid var(--wood); }
.price { color: var(--muted); margin: 6px 0 14px; }
.price span { font-family: var(--serif); font-size: 2.4rem; color: var(--green-dark); margin-right: 6px; }
.preset-list { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); padding: 0; list-style: none; }
.preset-list a { display: block; text-decoration: none; }

/* Designer */
.designer { max-width: 1280px; margin: 0 auto; display: grid; gap: 20px; }
@media (min-width: 1000px) { .designer { grid-template-columns: 340px 1fr; align-items: start; } .designer-form { position: sticky; top: 12px; } }
.designer-form { display: grid; gap: 12px; }
.viewer { position: relative; background: linear-gradient(#e9f0ea, #f7f4ec); border-radius: var(--radius); border: 1px solid var(--line); height: min(62vh, 560px); overflow: hidden; }
.viewer canvas { display: block; width: 100%; height: 100%; }
.step-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 10px 0; }
.step-text { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-top: 18px; }
.tabs button { background: none; border: 0; padding: 10px 14px; font: 600 0.98rem var(--sans); color: var(--muted); cursor: pointer; border-bottom: 3px solid transparent; }
.tabs button[aria-selected=true] { color: var(--green-dark); border-bottom-color: var(--wood); }
.tab-panel { padding: 16px 0; }
.drawing { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px; margin-bottom: 16px; }
.drawing svg { width: 100%; height: auto; }
.warnings { background: var(--wood-light); border-radius: 10px; padding: 10px 14px; }
.design-list { list-style: none; padding: 0; display: grid; gap: 12px; }
.design-list h3 { margin: 0; }

@media print {
  body { background: #fff; font-size: 11pt; }
  .site-header nav, .site-footer nav, .no-print, .designer-form, .viewer, .step-bar, .tabs { display: none !important; }
  .designer { display: block; }
  .tab-panel { display: block !important; page-break-before: always; }
  .card { box-shadow: none; }
}