:root {
  color-scheme: light;
  --ink: #171512;
  --muted: #6b6257;
  --paper: #f7f3eb;
  --panel: #fffaf1;
  --line: #d8cab8;
  --accent: #b83f2f;
  --accent-dark: #79291f;
  --steel: #2d4f57;
  --shadow: 0 18px 50px rgb(42 29 16 / 13%);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgb(45 79 87 / 8%) 1px, transparent 1px),
    linear-gradient(rgb(45 79 87 / 8%) 1px, transparent 1px),
    var(--paper);
  background-size: 26px 26px;
  font-family: Avenir Next, Avenir, Helvetica, sans-serif;
}

button,
input {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(300px, 390px) minmax(0, 1fr);
  gap: 24px;
  width: min(1480px, calc(100% - 32px));
  min-height: calc(100vh - 32px);
  margin: 16px auto;
}

.control-panel,
.results-panel {
  border: 1px solid var(--line);
  background: rgb(255 250 241 / 94%);
  box-shadow: var(--shadow);
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1;
}

h1 {
  max-width: 8ch;
  font-family: Georgia, Times, serif;
  font-size: clamp(4rem, 7vw, 6.5rem);
  font-weight: 700;
}

h2 {
  font-size: 0.95rem;
}

.mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 0;
  padding: 0;
  border: 0;
}

.mode-switch legend {
  grid-column: 1 / -1;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.mode-switch label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid var(--line);
  background: white;
  font-weight: 800;
  cursor: pointer;
}

.mode-switch input {
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
}

.mode-switch label:has(input:checked) {
  border-color: var(--accent);
  color: white;
  background: var(--accent);
}

.measure-form {
  display: grid;
  gap: 14px;
}

.workflow-panel {
  display: grid;
  gap: 14px;
}

.mode-note {
  border-left: 5px solid var(--accent);
  padding: 10px 12px;
  color: var(--muted);
  background: #fff3e6;
  font-size: 0.9rem;
  font-weight: 750;
  line-height: 1.35;
}

.measure-form label {
  display: grid;
  gap: 7px;
}

.measure-form span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.measure-form input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 8px 12px;
  color: var(--ink);
  background: white;
  font-size: 1.2rem;
}

.measure-form input:focus {
  outline: 3px solid rgb(184 63 47 / 25%);
  border-color: var(--accent);
}

.calculate-button {
  min-height: 52px;
  margin-top: 6px;
  border: 0;
  background: var(--steel);
  color: white;
  font-weight: 900;
  letter-spacing: 0.02em;
  cursor: pointer;
}

.calculate-button:focus {
  outline: 3px solid rgb(45 79 87 / 28%);
  outline-offset: 3px;
}

.calculate-button:hover {
  background: #213d43;
}

.calculation-status {
  min-height: 22px;
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
}

.calculation-status[data-state="dirty"] {
  color: var(--accent-dark);
}

.calculation-status[data-state="fresh"] {
  color: var(--steel);
}

.assumptions {
  margin-top: auto;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.assumptions ul {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.45;
}

.results-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 24px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.stock-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.stock-grid h2 {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.stock-grid article {
  border: 1px solid var(--line);
  padding: 14px 16px;
  background: #fbf4e9;
}

.stock-grid span,
.stock-grid small {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.stock-grid strong {
  display: block;
  margin: 8px 0;
  font-family: Georgia, Times, serif;
  font-size: clamp(1.15rem, 1.8vw, 1.8rem);
  line-height: 1.05;
}

.diagram-section {
  margin-bottom: 18px;
}

.diagram-section h2 {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.diagram-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.diagram-card {
  min-width: 0;
  border: 1px solid var(--line);
  padding: 14px;
  background: white;
}

.diagram-card > div:first-child {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 10px;
}

.diagram-card span {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.diagram-card strong {
  font-family: Georgia, Times, serif;
  font-size: 1rem;
  line-height: 1.15;
}

.diagram-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f8efe2;
}

.layout-svg {
  display: block;
  width: 100%;
  height: auto;
}

.board-outline {
  fill: #fffaf1;
  stroke: var(--ink);
  stroke-width: 2;
}

.piece {
  stroke: #29231c;
  stroke-width: 1.5;
}

.piece-bottom,
.piece-lid {
  fill: #d9c49c;
}

.piece-side {
  fill: #9fb2a6;
}

.piece-end {
  fill: #d58c73;
}

.piece-batten,
.piece-handle,
.piece-cleat {
  fill: #c7d3d5;
}

.piece-label {
  fill: var(--ink);
  font-weight: 900;
  paint-order: stroke;
  stroke: rgb(255 250 241 / 80%);
  stroke-width: 3px;
}

.piece-dimensions {
  fill: #3f382f;
  font-weight: 800;
  paint-order: stroke;
  stroke: rgb(255 250 241 / 75%);
  stroke-width: 2px;
}

.small-piece .piece-label {
  stroke-width: 2px;
}

.small-piece .piece-dimensions {
  stroke-width: 1.5px;
}

.board-dimension {
  fill: var(--accent-dark);
  font-size: 13px;
  font-weight: 900;
}

.summary-grid article {
  min-height: 88px;
  border-left: 5px solid var(--steel);
  padding: 15px 16px;
  background: white;
}

.summary-grid span {
  display: block;
  margin-bottom: 9px;
  color: var(--muted);
  font-size: 0.77rem;
  font-weight: 800;
  text-transform: uppercase;
}

.summary-grid strong {
  font-family: Georgia, Times, serif;
  font-size: clamp(1.3rem, 2vw, 2rem);
  line-height: 1;
}

.error-message {
  margin: 0 0 16px;
  border: 1px solid var(--accent);
  padding: 12px 14px;
  color: var(--accent-dark);
  background: #fff1ec;
  font-weight: 800;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  background: white;
}

table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}

caption {
  padding: 14px 16px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-align: left;
  text-transform: uppercase;
}

th,
td {
  border-top: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--steel);
  background: #f2eadf;
  font-size: 0.78rem;
  text-transform: uppercase;
}

td {
  font-size: 0.94rem;
}

td.component,
td.number {
  font-weight: 850;
}

td.rule {
  max-width: 380px;
  color: var(--muted);
}

tbody tr:nth-child(even) {
  background: #fcf7ef;
}

@media (max-width: 1180px) {
  .diagram-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
    width: min(100% - 24px, 900px);
  }

  h1 {
    max-width: none;
    font-size: 4.2rem;
  }

  .summary-grid {
    grid-template-columns: 1fr;
  }

  .stock-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .app-shell {
    width: 100%;
    min-height: 100vh;
    margin: 0;
  }

  .control-panel,
  .results-panel {
    border-left: 0;
    border-right: 0;
    padding: 16px;
    box-shadow: none;
  }

  .control-panel {
    gap: 20px;
  }

  h1 {
    font-size: 3.5rem;
  }

  .diagram-section {
    margin-right: -10px;
    margin-left: -10px;
  }

  .diagram-section h2 {
    margin-left: 10px;
  }

  .diagram-card {
    border-right: 0;
    border-left: 0;
    padding: 10px;
  }

  .diagram-frame {
    border-right: 0;
    border-left: 0;
  }

  .mode-switch {
    grid-template-columns: 1fr;
  }
}