/* Dataset builder demo (demo.html only) */
.demo-hero { padding-top: clamp(56px, 9vh, 104px); padding-bottom: 48px; }
.demo-hero .wrap { display: flex; flex-direction: column; gap: 20px; }
.demo-hero h1 { font-size: clamp(40px, 5.4vw, 72px); line-height: 1.04; letter-spacing: -0.045em; font-weight: 400; max-width: 900px; text-wrap: balance; }
.demo-hero p { font-size: clamp(16px, 1.4vw, 19px); line-height: 1.6; color: var(--ink-2); font-weight: 300; max-width: 640px; }

.builder { padding-bottom: clamp(96px, 14vh, 160px); }
.builder .wrap { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 32px; align-items: start; }

.controls { display: flex; flex-direction: column; gap: 32px; border: 1px solid var(--line-2); border-radius: 20px; padding: 32px; }
.ctl { display: flex; flex-direction: column; gap: 14px; border: 0; padding: 0; margin: 0; min-width: 0; }
.ctl-label { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-size: 15px; font-weight: 500; padding: 0; }
.ctl-label output { font-family: var(--mono); font-size: 14px; font-weight: 400; color: var(--blue-text); }
.ctl-hint { font-size: 13px; color: var(--muted); margin-top: -6px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 8px 16px; border: 1px solid var(--line-3); border-radius: 999px; font-size: 14px; color: var(--ink-2); cursor: pointer; transition: background-color .15s ease, border-color .15s ease, color .15s ease; user-select: none; }
.chip span:hover { border-color: var(--blue-light); color: var(--ink); }
.chip input:checked + span { background: var(--blue-soft); border-color: var(--blue); color: var(--blue-deep); }
.chip input:focus-visible + span { outline: 2px solid var(--blue); outline-offset: 2px; }

.other-input { width: 100%; min-height: 44px; padding: 10px 16px; border: 1px solid var(--line-3); border-radius: 12px; font: inherit; font-size: 15px; color: var(--ink); background: #ffffff; }
.other-input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft); }
.other-input[hidden] { display: none; }

.seg { display: inline-grid; grid-auto-flow: column; grid-auto-columns: 1fr; padding: 4px; background: var(--tint-2); border-radius: 999px; }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: flex; justify-content: center; align-items: center; min-height: 38px; padding: 6px 18px; border-radius: 999px; font-size: 14px; color: var(--ink-2); cursor: pointer; transition: background-color .15s ease, color .15s ease, box-shadow .15s ease; }
.seg input:checked + span { background: #ffffff; color: var(--ink); box-shadow: 0 1px 3px rgba(10, 22, 40, .12); }
.seg input:focus-visible + span { outline: 2px solid var(--blue); outline-offset: 1px; }

.range { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 999px; background: linear-gradient(to right, var(--blue) var(--fill, 50%), var(--line-2) var(--fill, 50%)); outline: none; }
.range::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 22px; height: 22px; border-radius: 50%; background: #ffffff; border: 2px solid var(--blue); box-shadow: 0 1px 4px rgba(10, 22, 40, .18); cursor: pointer; }
.range::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: #ffffff; border: 2px solid var(--blue); cursor: pointer; }
.range:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--blue); outline-offset: 2px; }

.output { position: sticky; top: 112px; display: flex; flex-direction: column; gap: 16px; }
.dpanel { border: 1px solid var(--line-2); border-radius: 20px; background: #ffffff; }
.dpanel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 18px 24px; border-bottom: 1px solid var(--line); }
.dpanel-title { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat { padding: 20px 24px; display: flex; flex-direction: column; gap: 6px; border-right: 1px solid var(--line); min-width: 0; }
.stat:last-child { border-right: 0; }
.stat .v { font-size: clamp(22px, 2vw, 28px); letter-spacing: -0.03em; font-weight: 500; white-space: nowrap; }
.stat .k { font-size: 13px; color: var(--muted); }

.player { padding: 20px 24px 24px; display: flex; flex-direction: column; gap: 16px; }
.play-btn { display: inline-flex; align-items: center; gap: 8px; min-height: 34px; padding: 6px 14px; border: 1px solid var(--line-3); border-radius: 999px; background: #ffffff; font: inherit; font-size: 13px; color: var(--ink); cursor: pointer; }
.play-btn:hover { background: var(--tint-2); }
.now { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.now-step { font-size: 18px; font-weight: 500; letter-spacing: -0.01em; }
.now-time { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.lanes { position: relative; display: flex; flex-direction: column; gap: 8px; }
.lane { display: grid; grid-template-columns: 104px minmax(0, 1fr); align-items: center; gap: 12px; }
.lane-name { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lane-track { position: relative; height: 26px; border-radius: 6px; background: var(--tint); overflow: hidden; }
.lane-track svg { display: block; width: 100%; height: 100%; }
.seg-row { display: flex; height: 100%; }
.seg-row div { height: 100%; display: flex; align-items: center; padding: 0 8px; font-size: 11px; color: var(--blue-deep); white-space: nowrap; overflow: hidden; border-right: 2px solid #ffffff; transition: background-color .15s ease; }
.seg-row div.on { background: var(--blue) !important; color: #ffffff; }
.playhead { position: absolute; top: -4px; bottom: -4px; width: 2px; background: var(--ink); border-radius: 2px; pointer-events: none; }

.delivery { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.dtree, .code { margin: 0; padding: 20px 24px; font-family: var(--mono); font-size: 12.5px; line-height: 1.9; color: var(--ink-2); white-space: pre; overflow-x: auto; }
.dtree { border-right: 1px solid var(--line); }
.dtree b { font-weight: 400; color: var(--ink); }
.code { background: var(--tint); border-bottom-right-radius: 20px; }
.code .c { color: var(--faint); }
.code .s { color: var(--blue-text); }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.disclaimer { font-size: 13px; color: var(--muted); }

@media (max-width: 1180px) {
  .builder .wrap { grid-template-columns: minmax(0, 1fr); }
  .output { position: static; }
}
@media (max-width: 640px) {
  .controls { padding: 24px 20px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .delivery { grid-template-columns: minmax(0, 1fr); }
  .dtree { border-right: 0; border-bottom: 1px solid var(--line); }
  .code { border-bottom-left-radius: 20px; }
  .lane { grid-template-columns: 76px minmax(0, 1fr); }
  .dpanel-head, .player, .stat, .dtree, .code { padding-left: 18px; padding-right: 18px; }
  .seg { display: grid; width: 100%; }
}