:root {
  color-scheme: light;
  --bg: #f7f3ea;
  --ink: #2a2a28;
  --muted: #5c5852;
  --line: #ddd4c4;
  --card: #fffdf8;
  --yellow: #f6c445;
  --yellow-deep: #c47d0e;
  --ply: #e6d0a8;
  --danger: #9c2f2f;
  --warn: #8a5a12;
  --info: #24536b;
  --shadow: 0 1px 0 rgb(42 42 40 / 6%);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #171614;
    --ink: #f3efe6;
    --muted: #c8c0b2;
    --line: #3a362f;
    --card: #221f1b;
    --yellow: #e6b422;
    --yellow-deep: #f0d48a;
    --danger: #ffb4b4;
    --warn: #f0d48a;
    --info: #b7d7e6;
    --shadow: none;
  }

  .tool-nav__link,
  button[aria-pressed="true"],
  .view-toolbar button[aria-selected="true"],
  .badge {
    color: #2a2a28;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  font-size: 1.05rem;
  line-height: 1.45;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

.tool-header {
  position: sticky;
  z-index: 50;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.tool-nav {
  display: flex;
  gap: 16px;
  align-items: center;
  width: 100%;
  padding: 12px 16px;
}

.tool-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 8px;
  color: #2a2a28;
  text-decoration: none;
  background: var(--yellow);
  border-radius: 4px;
}

.tool-nav__link:hover,
.tool-nav__link:focus-visible {
  outline: 2px solid var(--yellow-deep);
  outline-offset: 2px;
}

.page {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto 64px;
}

.intro h1 {
  margin: 28px 0 8px;
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.intro p {
  max-width: 68ch;
  margin: 0 0 20px;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.layout > *,
.controls,
.stage,
.view-panel,
.field,
.section,
.presets,
.row,
.actions,
.view-toolbar,
.table-wrap {
  min-width: 0;
  max-width: 100%;
}

.controls,
.stage,
.sheet-figure,
.compare,
.cut-table {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.controls {
  padding: 16px;
}

.stage {
  padding: 16px;
}

.output {
  margin-top: 28px;
}

.output > section,
.output > details,
.controls > details {
  margin-top: 16px;
}

.plan-title {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.core {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 12px;
}

.span-2 {
  grid-column: 1 / -1;
}

.view-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

details > summary {
  display: flex;
  align-items: center;
  min-height: 44px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  cursor: pointer;
}

.presets,
.row,
.view-toolbar,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.presets {
  margin-bottom: 12px;
}

button,
.choice {
  min-height: 44px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
}

button:hover,
button:focus-visible,
.choice:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--yellow-deep);
  outline-offset: 2px;
}

button[aria-pressed="true"],
.view-toolbar button[aria-selected="true"] {
  color: #2a2a28;
  background: var(--yellow);
  border-color: var(--yellow);
}

.field {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 10px 0;
}

.field label,
.section h2,
.section h3 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.92rem;
}

.section h2 {
  margin: 18px 0 8px;
  font-size: 1.05rem;
}

.section h3 {
  margin: 12px 0 4px;
}

input,
select {
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.inline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  max-width: 100%;
}

.inline input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  min-height: 0;
}

.bay {
  margin: 8px 0;
  padding: 8px;
  border: 1px dashed var(--line);
  border-radius: 6px;
}

.hint {
  min-height: 28px;
  margin-left: 4px;
  padding: 0 8px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  vertical-align: middle;
}

.hint-pop {
  position: static;
  margin: 2px 0 8px;
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
}

.print-only {
  display: none;
}

.badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  color: #2a2a28;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  background: var(--yellow);
  border-radius: 99px;
}

.summary {
  margin: 0 0 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.cost-flag {
  margin: 0 0 8px;
  padding: 10px 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  border-left: 4px solid var(--danger);
  background: color-mix(in srgb, var(--danger) 12%, transparent);
}

.view-panel svg,
.sheet-figure svg {
  display: block;
  width: 100%;
  height: auto;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 35%), transparent 40%), var(--ply);
  border-radius: 6px;
}

#view3d {
  display: block;
  width: 100%;
  height: 420px;
  background: #efe6d6;
  border-radius: 6px;
  touch-action: none;
}

.view-help,
.sheet-note,
.fine {
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
}

.warnings {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
  padding: 0;
  list-style: none;
}

.warnings li {
  margin: 0;
  padding: 10px 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.92rem;
  border-left: 4px solid var(--info);
  border-radius: 4px;
}

.warnings li[data-level="info"] {
  color: var(--muted);
  border-color: var(--line);
}

.warnings li[data-level="warn"] {
  border-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 12%, transparent);
}

.warnings li[data-level="danger"] {
  border-color: var(--danger);
  background: color-mix(in srgb, var(--danger) 12%, transparent);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.88rem;
}

th,
td {
  padding: 8px 6px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.table-wrap {
  overflow-x: auto;
}

@media (min-width: 521px) {
  #cut-table {
    table-layout: fixed;
  }

  #cut-table th,
  #cut-table td {
    overflow-wrap: anywhere;
  }
}

.steps,
.assumptions {
  padding-left: 1.2rem;
}

.steps li,
.assumptions li {
  margin: 8px 0;
}

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 12px 0;
  padding: 12px;
}

.sheet-figure {
  margin: 12px 0;
  padding: 12px;
}

.sheet-figure ol {
  padding-left: 1.2rem;
}

.pocket-figure svg {
  width: 100%;
  height: auto;
  background: var(--card);
}

.pocket-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-inline-start: 8px;
}

details {
  margin-top: 8px;
}

@media (min-width: 861px) {
  .stage {
    position: sticky;
    top: 68px;
    align-self: start;
    max-height: calc(100vh - 80px);
    max-height: calc(100svh - 80px);
    overflow: auto;
  }
}

@media (max-width: 860px) {
  .layout,
  .compare {
    grid-template-columns: 1fr;
  }

  .stage {
    order: -1;
  }

  #view3d {
    height: 300px;
  }
}

@media (max-width: 520px) {
  .core {
    grid-template-columns: 1fr;
  }

  #cut-table thead {
    display: none;
  }

  #cut-table,
  #cut-table tbody,
  #cut-table tr,
  #cut-table td {
    display: block;
    width: 100%;
  }

  #cut-table tr {
    margin-bottom: 12px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 6px;
  }

  #cut-table td {
    padding: 2px 0;
    border: 0;
  }

  #cut-table td::before {
    content: attr(data-label);
    display: inline-block;
    min-width: 6.5rem;
    margin-right: 8px;
    font-weight: 600;
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

@media print {
  .tool-header,
  .intro,
  .controls,
  .view-toolbar,
  .view-bar,
  .no-print,
  .summary,
  .view-help,
  .warnings,
  #notes,
  #sag-section,
  #steps-section,
  #assumptions-section,
  #panel-front,
  #panel-plan,
  #panel-three {
    display: none !important;
  }

  .layout,
  .output {
    display: block;
  }

  #panel-sheets,
  #cut-section,
  #pocket-section,
  #hardware-section,
  .print-only {
    display: block !important;
  }

  #print-banner {
    margin: 0 0 16px;
  }

  #print-anchor {
    border-left: 4px solid #000;
    padding-left: 8px;
  }

  body,
  .stage,
  .sheet-figure,
  .output {
    background: #fff;
    color: #000;
  }
}