:root {
  color-scheme: light;
  --ink: #17231b;
  --muted: #5d695f;
  --paper: #f6f2e8;
  --card: #fffdf7;
  --line: #d8d0be;
  --green: #1f5938;
  --green-2: #2d7750;
  --wood: #d9b77f;
  --cut: #f6dfb7;
  --danger: #9d2d20;
  --shadow: 0 14px 36px rgba(30, 42, 33, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
a { color: var(--green); }
button, input { font: inherit; }
.wrap { width: min(1120px, calc(100% - 32px)); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: rgba(246, 242, 232, .96); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 64px; }
.brand { color: var(--ink); font-weight: 800; text-decoration: none; letter-spacing: -.02em; }
.nav { display: flex; flex-wrap: wrap; gap: 16px; font-size: .93rem; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a:focus-visible { color: var(--green); text-decoration: underline; }
.hero { padding: 64px 0 36px; }
.eyebrow { color: var(--green); font-weight: 750; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; }
h1, h2, h3 { line-height: 1.13; letter-spacing: -.025em; }
h1 { max-width: 820px; margin: 8px 0 16px; font-size: clamp(2.25rem, 6vw, 4.8rem); }
h2 { margin-top: 0; font-size: clamp(1.55rem, 3vw, 2.25rem); }
.lede { max-width: 760px; color: var(--muted); font-size: 1.14rem; }
.tool-shell { display: grid; grid-template-columns: minmax(330px, .9fr) minmax(0, 1.1fr); gap: 24px; padding-bottom: 64px; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: clamp(18px, 3vw, 28px); box-shadow: var(--shadow); }
.field-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
label { display: grid; gap: 5px; color: var(--muted); font-size: .86rem; font-weight: 650; }
input[type="number"], input[type="text"] { width: 100%; border: 1px solid #bdb5a5; border-radius: 9px; padding: 10px 11px; background: #fff; color: var(--ink); }
input:focus { border-color: var(--green-2); outline: 3px solid rgba(45, 119, 80, .14); }
.check { display: flex; align-items: center; gap: 8px; margin-top: 14px; }
.rows { display: grid; gap: 8px; margin: 20px 0 12px; }
.row { display: grid; grid-template-columns: 1.4fr repeat(3, .7fr) 38px; gap: 7px; align-items: end; }
.row.linear { grid-template-columns: 1.4fr repeat(2, .8fr) 38px; }
.remove { border: 1px solid var(--line); border-radius: 8px; min-height: 42px; background: #fff; color: var(--danger); cursor: pointer; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.button { display: inline-flex; justify-content: center; align-items: center; border: 0; border-radius: 10px; padding: 11px 16px; background: var(--green); color: #fff; font-weight: 750; text-decoration: none; cursor: pointer; }
.button:hover { background: var(--green-2); }
.button.secondary { background: transparent; color: var(--green); border: 1px solid var(--green); }
.hint { color: var(--muted); font-size: .86rem; }
.error { color: var(--danger); font-weight: 700; }
.summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 20px; }
.metric { border: 1px solid var(--line); border-radius: 12px; padding: 13px; }
.metric strong { display: block; font-size: 1.55rem; }
.sheet-card { margin-top: 18px; }
.sheet-card h3 { margin-bottom: 8px; }
.diagram { display: block; width: 100%; height: auto; border: 1px solid #a58d66; background: var(--wood); border-radius: 8px; }
.board { position: relative; height: 64px; border: 1px solid #a58d66; border-radius: 7px; overflow: hidden; background: var(--wood); margin: 9px 0 4px; }
.board-piece { position: absolute; inset-block: 0; border-right: 2px solid #fff; background: var(--cut); display: grid; place-items: center; overflow: hidden; white-space: nowrap; font-size: .75rem; }
.content-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; padding: 64px 0; }
.content-grid > article, .copy-card { border-top: 3px solid var(--green); padding-top: 16px; }
.project-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; padding-bottom: 64px; }
.project-list a { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; text-decoration: none; font-weight: 700; }
.project-intro { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; padding-bottom: 28px; }
.cut-list { width: 100%; border-collapse: collapse; font-size: .92rem; }
.cut-list th, .cut-list td { border-bottom: 1px solid var(--line); padding: 8px 6px; text-align: left; }
.app-cta { background: var(--green); color: #fff; border-radius: 18px; padding: 30px; margin: 10px 0 64px; }
.app-cta p { color: #e1eee6; max-width: 700px; }
.app-cta .button { background: #fff; color: var(--green); }
.fine-print { color: var(--muted); font-size: .84rem; }
footer { border-top: 1px solid var(--line); padding: 28px 0 48px; color: var(--muted); font-size: .88rem; }
.noscript { padding: 12px; border: 1px solid var(--danger); color: var(--danger); }

@media (max-width: 780px) {
  .site-header .wrap { align-items: flex-start; flex-direction: column; padding-block: 14px; }
  .tool-shell, .project-intro { grid-template-columns: 1fr; }
  .content-grid { grid-template-columns: 1fr; }
  .project-list { grid-template-columns: repeat(2, 1fr); }
  .row { grid-template-columns: 1fr 1fr; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
  .row label:first-child { grid-column: 1 / -1; }
  .remove { align-self: end; }
}

@media (max-width: 480px) {
  .field-grid, .summary { grid-template-columns: 1fr; }
  .project-list { grid-template-columns: 1fr; }
  .hero { padding-top: 42px; }
}


/* Project pages */
.spec-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.spec-list strong { display: block; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; }
.cut-list { margin: 12px 0 28px; }
.cut-list caption { text-align: left; font-weight: 750; padding-bottom: 8px; }
.lumber { padding-bottom: 40px; }
.steps { padding-left: 20px; display: grid; gap: 10px; max-width: 760px; margin-bottom: 48px; }
details { border-top: 1px solid var(--line); padding: 12px 0; max-width: 760px; }
details:last-of-type { border-bottom: 1px solid var(--line); margin-bottom: 48px; }
summary { cursor: pointer; font-weight: 700; }
details p { color: var(--muted); margin-bottom: 0; }
@media (max-width: 640px) { .cut-list { display: block; overflow-x: auto; } }