.calculator-section { padding-block: 72px; background: var(--paper); border-top: 1px solid var(--line); }
.calculator-section [hidden] { display: none !important; }
.calculator-intro { max-width: 760px; color: var(--muted); font-size: 15px; margin-bottom: 30px; }
.calculator { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); border: 1px solid var(--line); background: #fcfcf9; }
.calculator-form { padding: 36px; }
.calculator-material { margin-bottom: 28px; }
.calculator-form fieldset { border: 0; padding: 0; margin: 0 0 28px; min-width: 0; }
.calculator-form legend { font-weight: 600; font-size: 16px; margin-bottom: 16px; padding: 0; }
.calculator-form legend span { color: var(--wood); font-size: 11px; letter-spacing: 1px; margin-right: 10px; }
.calculator-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.calculator-form label { display: block; font-size: 13px; font-weight: 600; }
.calculator-form input[type="number"], .calculator-form select { display: block; width: 100%; min-height: 48px; margin-top: 7px; padding: 11px 12px; border: 1px solid #abb3a8; border-radius: 3px; color: var(--ink); background: #fff; font-size: 15px; }
.calculator-form select { text-overflow: ellipsis; padding-right: 24px; }
.calculator-custom { margin-top: 16px; }
.calculator-form .calculator-check { display: flex; align-items: flex-start; gap: 10px; margin-top: 17px; font-weight: 400; }
.calculator-check input { flex: none; width: 18px; height: 18px; accent-color: var(--forest); margin: 2px 0 0; }
.calculator-help { color: var(--muted); font-size: 12px; line-height: 1.65; margin: 9px 0 15px; }
.calculator-form .button { width: 100%; font-size: 14px; }
.calculator-output { min-width: 0; padding: 36px; background: #e8ece1; border-left: 1px solid var(--line); }
.calculator-output .eyebrow { margin-bottom: 12px; }
.calculator-total { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 15px; color: var(--forest); margin-bottom: 7px; line-height: 1.1; }
.calculator-total strong { font-family: var(--serif); font-weight: 400; font-size: clamp(58px, 6vw, 82px); letter-spacing: -3px; overflow-wrap: anywhere; }
.calculator-total span { font-size: 19px; }
.calculator-summary { font-size: 13px; color: var(--muted); margin-top: 15px; }
.calculator-breakdown { margin: 25px 0 20px; font-size: 13px; }
.calculator-breakdown > div { display: flex; justify-content: space-between; gap: 18px; padding: 10px 0; border-bottom: 1px solid #cbd2c4; }
.calculator-breakdown dd { margin: 0; font-weight: 700; white-space: nowrap; }
.calculator-subtotal { font-weight: 700; }
.calculator-layout { font-size: 12px; color: var(--muted); }
.calculator-diagram { margin: 22px 0 0; border-top: 1px solid #cbd2c4; padding-top: 8px; }
.calculator-diagram svg { display: block; width: 100%; max-height: 250px; }
.diagram-tile { fill: #f9f8f3; stroke: #c3ccbb; stroke-width: 1; }
.diagram-joist { stroke: #927052; stroke-width: 9; stroke-linecap: round; }
.calculator-wood-legend { text-align: center; color: var(--muted); font-size: 11px; margin-top: 10px; }
.plot-angle { fill: var(--forest); }
.plot-edge { fill: #927052; }
.plot-center { fill: #f9f8f3; stroke: var(--forest); stroke-width: 3; }
.calculator-diagram figcaption { font-size: 11px; color: var(--muted); text-align: center; }
.calculator-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; font-size: 11px; margin-top: 10px; }
.calculator-legend span { display: flex; align-items: center; gap: 7px; }
.calculator-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
.dot-angle { background: var(--forest); }
.dot-edge { background: #927052; }
.dot-center { border: 2px solid var(--forest); background: #f9f8f3; }
.calculator-error { background: #fff8ee; border-left: 3px solid var(--wood); padding: 20px; font-size: 14px; }
.calculator-method { margin-top: 24px; color: var(--muted); font-size: 13px; max-width: 900px; }
.calculator-method summary { cursor: pointer; font-size: 14px; font-weight: 600; color: var(--forest); padding-block: 8px; }
.calculator-method p { margin-top: 15px; }
@media (max-width: 900px) {
  .calculator-form, .calculator-output { padding: 25px; }
}
@media (max-width: 700px) {
  .calculator-section { padding-block: 48px; }
  .calculator { grid-template-columns: 1fr; }
  .calculator-output { border-left: 0; border-top: 1px solid var(--line); }
}
@media (max-width: 390px) {
  .calculator-form, .calculator-output { padding: 20px 16px; }
  .calculator-fields { gap: 10px; }
}