.bench-tools { margin: 18px 0 26px; }
.fields { grid-template-columns: minmax(0, 1fr); }
.field, .field-row, .field input { min-width: 0; }
.field-label { flex-wrap: wrap; }
#chart { width: 100%; height: auto; display: block; }
@media (min-width: 720px) { .fields { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.bench-tools details, .reference-details { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-card); box-shadow: inset 0 1px 0 var(--edge), var(--shadow-card); margin: 10px 0; padding: 15px 20px; }
summary { cursor: pointer; font-weight: 500; }
.calculation { min-width: 0; }
#calculation-text { margin-top: 22px; }
#calculation-text > p { font-size: 14px; line-height: 1.7; overflow-wrap: anywhere; }
.equation { min-width: 0; margin: 14px 0; padding: 16px 18px; border-left: 2px solid var(--cyan); background: var(--bg-inset); border-radius: 0 8px 8px 0; }
.equation h3 { margin: 0 0 12px; font: 500 12px var(--font-display); color: var(--muted); }
.equation-math { overflow-x: auto; padding: 4px 0 10px; }
.equation-math .katex-display { margin: 0; text-align: left; }
.equation-math .katex-display > .katex { text-align: left; }
.equation-math .katex { font-size: 1.15em; }
.equation-error { color: var(--danger); font-size: 13px; }
@media (max-width: 700px) { .equation { padding: 14px 10px; } .equation-math .katex { font-size: 1em; } .gain-result { padding: 14px 12px; } .gain-result .katex { font-size: 1em; } }
.muted, .hint { color: var(--muted); }
.work-fields input, .work-fields select, .stage input, .stage select, .segment input, .segment select, .dut-body input, .dut-body select {
  display: block; width: 100%; margin-top: 7px; background: var(--bg-well); color: var(--text); border: 1px solid var(--line-strong); border-radius: 10px; padding: 11px 12px; font: 15px var(--font-mono); font-variant-numeric: tabular-nums; min-width: 0; box-shadow: var(--shadow-inset);
}
.work-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 16px; margin: 18px 0; }
.work-fields.timing-fields { grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr)); }
.work-fields label, .stage label, .segment label { font-size: 12px; color: var(--muted); min-width: 0; }
.segment { display: grid; grid-template-columns: auto repeat(3, minmax(0, 1fr)) auto; gap: 10px; align-items: end; padding: 10px 0; border-bottom: 1px solid var(--line); }
.segment-lead { display: flex; flex-direction: column; align-items: center; gap: 5px; padding-bottom: 14px; }
.segment-lead input { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; margin: 0; }
.segment-index { font: 500 12px var(--font-mono); color: var(--accent); min-width: 18px; text-align: center; cursor: pointer; }
.segment.is-off { opacity: .45; }
.segment.is-off .segment-index { color: var(--muted); text-decoration: line-through; }
.segment button { min-height: 42px; }
.sweep-hint { margin: 6px 0 0; }
.sweep-page .sweep-details { border-top: 1px solid var(--line); margin: 18px 0; padding: 14px 0 0; min-width: 0; }
.sweep-page .sweep-details > summary { font-size: 14px; color: var(--muted); }
.sweep-page .sweep-details[open] > summary { color: var(--text); margin-bottom: 16px; }
.sweep-page .sweep-extra { margin: 16px 0; }
.sweep-page .sweep-extra[open] > summary { margin-bottom: 20px; }
.sweep-page .timing-fields { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.sweep-page #calc #sweep-metrics { margin-top: 24px; }
.sweep-page #calc #sweep-metrics .metric.primary { grid-column: auto; }
.sweep-page .segment button[hidden] { display: none; }
.sweep-page #sweep-status:empty { display: none; }
@media (max-width: 540px) { .sweep-page .timing-fields { grid-template-columns: minmax(0, 1fr); } }
/* Mixed-mode page: the single-ended entry grid and the mixed-mode result table. */
.equation-group { margin: 0 0 8px; font: 500 12px var(--font-display); color: var(--muted); }
#mixed-equations .gain-result { margin: 12px 0; }
.link-button { display: inline-flex; align-items: center; text-decoration: none; }
.link-button:hover { text-decoration: none; }
#mapping label span { display: block; }
.gain-result { margin: 18px 0; padding: 18px; border-left: 2px solid var(--cyan); background: var(--bg-inset); border-radius: 0 8px 8px 0; overflow-x: auto; }
.gain-result .katex { font-size: 1.2em; }
.gain-note { margin: 14px 0 0; }
.ls-panel h4 { margin: 20px 0 2px; font: 500 12px var(--font-ui); color: var(--text); }
.ls-panel h3 { margin: 30px 0 4px; padding-top: 18px; border-top: 1px solid var(--line); font: 500 12px var(--font-display); color: var(--accent); letter-spacing: .08em; text-transform: uppercase; }
.unit-pair { display: flex; gap: 6px; }
.unit-pair input { flex: 1; width: 60%; min-width: 0; }
.unit-pair select { width: 88px; flex: 0 0 88px; }
.quantity-field { min-width: 0; }
.signed-field { display: flex; align-items: stretch; gap: 6px; flex: 1; min-width: 0; }
.signed-field > input { flex: 1; min-width: 0; }
.work-fields .signed-field > input, .stage .signed-field > input { margin-top: 0; }
.work-fields .signed-field, .stage .signed-field { margin-top: 7px; }
button.sign {
  flex: 0 0 44px; width: 44px; min-height: 42px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg-well); color: var(--muted); font: 1rem var(--font-mono); box-shadow: var(--shadow-control); cursor: pointer;
}
button.sign:hover { color: var(--text); border-color: var(--accent); }
.field-row .signed-field { gap: 8px; }
.field-row button.sign { flex: 0 0 36px; width: 36px; min-height: 36px; height: 36px; }
.delay-page .work-fields { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.work-board hr { border: 0; border-top: 1px solid var(--line-strong); margin: 28px 0; }
.work-board { padding: 24px; }
.work-board h2 { margin: 30px 0 10px; font-family: var(--font-display); font-size: 1.2rem; letter-spacing: -0.01em; }
.work-board > h2:first-child { margin-top: 0; }
.work-board + .work-board { margin-top: 20px; }
.status-error { color: var(--danger); }
/* The DUT card: one line collapsed, a small form open. It rides in the link, not in storage. */
.dut-card { margin: -4px 0 18px; }
.dut-details { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-card); box-shadow: inset 0 1px 0 var(--edge), var(--shadow-card); }
.dut-details > summary { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; padding: 11px 16px; font-size: 13px; list-style: none; }
.dut-details > summary::-webkit-details-marker { display: none; }
.dut-kicker { font: 600 11px var(--font-display); letter-spacing: .16em; color: var(--dim); }
.dut-summary { flex: 1 1 240px; font: 12.5px var(--font-mono); color: var(--text); min-width: 0; overflow-wrap: anywhere; }
.dut-summary strong { font-weight: 500; }
.dut-edit { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 3px 9px; }
.dut-details[open] .dut-edit { color: var(--text); border-color: var(--line-strong); }
.dut-body { padding: 4px 16px 16px; border-top: 1px solid var(--line); }
.dut-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px 18px; margin-top: 12px; }
.dut-side { display: grid; gap: 8px; align-content: start; }
.dut-side-label { font: 500 11px var(--font-display); letter-spacing: .12em; text-transform: uppercase; }
.dut-body .seg { justify-self: start; }
.dut-body .seg-btn { padding: 6px 12px; font-size: .8rem; }
.dut-range { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; align-content: start; grid-column: 1 / -1; max-width: 480px; }
.dut-range .unit-pair select { width: 76px; flex-basis: 76px; }
@media (min-width: 900px) { .dut-grid { grid-template-columns: 1.1fr 1fr 1fr 1.7fr; } .dut-range { grid-column: auto; max-width: none; } }
.dut-body label, .dut-body .quantity-field label { font-size: 12px; color: var(--muted); }
.dut-body .hint { margin: 12px 0 0; font-size: 12.5px; }
.dut-body .toolbar { margin-top: 12px; }
@media (max-width: 700px) { .dut-details > summary { padding: 10px 12px; } .dut-body { padding: 4px 12px 14px; } }
button:disabled { opacity: .45; cursor: default; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }
.stage { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg-inset); box-shadow: inset 0 1px 0 var(--edge); padding: 18px; margin: 12px 0; }
.stage-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: center; }
.stage-head strong { font-family: var(--font-mono); color: var(--accent); font-size: 12px; }
.stage-actions { display: flex; gap: 6px; }
.stage-actions button { padding: 7px 10px; min-height: 36px; }
.stage .work-fields { margin-bottom: 0; }
.chain-results { overflow-x: auto; }
.chain-results table { width: 100%; border-collapse: collapse; font-size: 13px; }
.chain-results th, .chain-results td { padding: 13px 12px; border-bottom: 1px solid var(--line); text-align: center; white-space: nowrap; }
.chain-results th:first-child, .chain-results td:first-child { text-align: left; white-space: normal; min-width: 115px; overflow-wrap: anywhere; }
.chain-results td { font-family: var(--font-mono); }
.chain-results th { color: var(--muted); font-weight: 400; }
.over-limit { color: var(--danger); }
.power-path { display: flex; gap: 8px; overflow-x: auto; padding: 14px 0 22px; }
.power-node { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg-inset); box-shadow: inset 0 1px 0 var(--edge); padding: 13px 16px; min-width: 140px; max-width: 200px; flex-shrink: 0; }
.power-node span { display: block; font-size: 11px; color: var(--muted); overflow-wrap: anywhere; }
.power-node strong { display: block; font: 17px var(--font-mono); margin-top: 5px; }
.power-link { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; flex-shrink: 0; min-width: 82px; }
.power-link-kind { font: 10px var(--font-mono); letter-spacing: .06em; color: var(--accent); }
.power-link-gain { font: 11px var(--font-mono); color: var(--muted); }
.power-arrow { width: 44px; height: 12px; display: block; }
.power-arrow .line { stroke: var(--line-strong); stroke-width: 1.4; fill: none; }
.power-arrow .tip { fill: var(--line-strong); stroke: none; }
.noise-bars { display: grid; gap: 12px; margin: 18px 0; }
.noise-bar-label { display: flex; justify-content: space-between; gap: 10px; font-size: 12px; color: var(--muted); }
.noise-bar-track { height: 6px; background: var(--line); margin-top: 5px; border-radius: 5px; }
.noise-bar-fill { height: 100%; background: var(--cyan); border-radius: 5px; }
.smith-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, .75fr); gap: 25px; align-items: center; }
#smith { width: 100%; height: auto; display: block; touch-action: none; }
#smith .smith-grid { fill: none; stroke: var(--line-strong); stroke-width: .8; }
#smith text { fill: var(--muted); font: 10px var(--font-mono); }
.smith-caption { text-align: center; color: var(--muted); font-size: 12px; }
.match-controls { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.match-controls button { min-height: 38px; }
.phase-results { border-left: 2px solid var(--cyan); padding-left: 18px; }
@media (max-width: 700px) {
  .smith-layout { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .work-board { padding: 17px; }
  .work-fields { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .delay-page .work-fields { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .work-fields label { min-width: 0; }
  nav { justify-content: flex-start; }
  nav a { padding: 8px; }
}
/* On a phone a results table becomes cards: one per row, each value under its own heading,
   so nothing scrolls sideways. */
@media (max-width: 700px) {
  .chain-results table, .chain-results tbody { display: block; width: 100%; }
  .chain-results thead { display: none; }
  .chain-results tr { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 12px; padding: 10px 0 12px; border-bottom: 1px solid var(--line); }
  .chain-results td { display: block; padding: 0; border: 0; text-align: left; white-space: normal; min-width: 0; overflow-wrap: anywhere; }
  .chain-results td:first-child { grid-column: 1 / -1; color: var(--text); font-weight: 500; }
  .chain-results td::before { content: attr(data-label); display: block; margin-bottom: 1px; font: 500 .58rem var(--font-display); letter-spacing: .12em; text-transform: uppercase; color: var(--dim); }
  .chain-results td[colspan] { grid-column: 1 / -1; }
  .chain-results td[colspan]::before { display: none; }
}
@media (max-width: 700px) {
  .segment { grid-template-columns: auto minmax(0, 1fr); }
  .segment-index { grid-row: 1 / span 4; align-self: center; padding-bottom: 0; }
  .segment > .quantity-field, .segment button { grid-column: 2; }
}
@media (max-width: 360px) { .work-fields { grid-template-columns: minmax(0, 1fr); } }