:root {
  --bg-soft: var(--surface-soft);
  --text-muted: var(--muted);
  --text-faint: var(--muted-2);
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.lab-hero {
  position: relative;
  min-height: 620px;
  padding: calc(var(--header-h) + 82px) 0 82px;
  overflow: hidden;
  background:
    radial-gradient(circle at 15% 28%, color-mix(in srgb, var(--primary) 13%, transparent), transparent 34%),
    radial-gradient(circle at 88% 70%, color-mix(in srgb, var(--cyan) 13%, transparent), transparent 34%);
}
.lab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .24;
  pointer-events: none;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, transparent, #000 17%, #000 88%, transparent);
}
.lab-hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr); align-items: center; gap: 56px; }
.lab-hero-copy { min-width: 0; }
.lab-hero h1 { max-width: 760px; margin: 16px 0 21px; color: var(--text-strong); font-size: clamp(2.45rem, 3.75vw, 4rem); line-height: 1.04; letter-spacing: -.04em; }
.lab-lead { max-width: 680px; margin: 0; color: var(--text-muted); font-size: clamp(1rem, 1.35vw, 1.18rem); line-height: 1.68; }
.lab-fairness { display: flex; align-items: flex-start; gap: 11px; max-width: 690px; margin: 24px 0 0; color: var(--text-muted); font-size: .9rem; line-height: 1.55; }
.lab-fairness > span:first-child { display: inline-grid; place-items: center; flex: 0 0 auto; width: 28px; height: 28px; border-radius: 50%; color: var(--primary); background: color-mix(in srgb, var(--primary) 12%, var(--bg-elevated)); font: 800 .92rem/1 var(--font-mono); }
.lab-back-link { display: inline-flex; align-items: center; gap: 9px; margin-top: 31px; color: var(--text-strong); font-size: .82rem; font-weight: 650; text-decoration: none; }
.lab-back-link:hover { color: var(--primary); }
.lab-route-visual { position: relative; min-height: 430px; border: 1px solid var(--border); border-radius: 30px; background: color-mix(in srgb, var(--bg-elevated) 88%, transparent); box-shadow: var(--shadow-lg); overflow: hidden; }
.lab-route-visual::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at center, color-mix(in srgb, var(--primary) 13%, transparent), transparent 45%); }
.lab-route-visual > svg { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--primary); }
.lab-route-visual > svg path { fill: none; stroke: currentColor; stroke-width: 1.4; stroke-dasharray: 7 8; opacity: .3; animation: labRoute 12s linear infinite; }
.lab-route-core { position: absolute; z-index: 2; inset: 50% auto auto 50%; display: grid; place-content: center; justify-items: center; gap: 10px; width: 174px; height: 174px; padding: 24px; border: 1px solid color-mix(in srgb, var(--primary) 32%, var(--border)); border-radius: 50%; text-align: center; transform: translate(-50%, -50%); background: var(--bg-elevated); box-shadow: 0 0 0 24px color-mix(in srgb, var(--primary) 5%, transparent), 0 18px 58px color-mix(in srgb, var(--primary) 18%, transparent); }
.lab-route-core small { color: var(--primary); font: 800 .62rem/1 var(--font-mono); letter-spacing: .14em; }
.lab-route-core strong { color: var(--text-strong); font-size: 1.26rem; line-height: 1.1; white-space: nowrap; }
.lab-route-node { position: absolute; z-index: 2; display: grid; min-width: 132px; gap: 4px; padding: 14px 16px; border: 1px solid var(--border); border-radius: 17px; background: var(--bg-elevated); box-shadow: var(--shadow-sm); }
.lab-route-node b { color: var(--text-strong); font: 850 .92rem/1 var(--font-mono); letter-spacing: .08em; }
.lab-route-node span { color: var(--text-muted); font-size: .68rem; }
.lab-route-cpu { inset: 52px auto auto 36px; }
.lab-route-gpu { inset: 52px 36px auto auto; }
.lab-route-qpu { inset: auto auto 31px 50%; transform: translateX(-50%); }
[dir="rtl"] .lab-route-qpu { transform: translateX(50%); }

.lab-section { position: relative; padding-top: 80px; background: var(--bg); }
.lab-scenario-brief { --scenario-blue: #5268ff; --scenario-cyan: #12b9e7; --scenario-violet: #a45cff; position: relative; isolation: isolate; margin-bottom: 48px; padding: 30px; overflow: hidden; border: 1px solid color-mix(in srgb, var(--primary) 38%, var(--border)); border-radius: 28px; background: radial-gradient(circle at 9% 4%, color-mix(in srgb, var(--scenario-blue) 12%, transparent), transparent 30%), radial-gradient(circle at 92% 88%, color-mix(in srgb, var(--scenario-cyan) 10%, transparent), transparent 31%), linear-gradient(135deg, color-mix(in srgb, var(--primary) 7%, var(--bg-elevated)), color-mix(in srgb, var(--cyan) 5%, var(--bg-elevated)) 58%, var(--bg-elevated)); box-shadow: 0 30px 90px color-mix(in srgb, var(--primary) 10%, transparent), var(--shadow-md); font-family: var(--font-sans); }
.lab-scenario-brief::before { content: ""; position: absolute; z-index: -1; inset: -45% 20% 50% -25%; pointer-events: none; background: linear-gradient(115deg, transparent 18%, color-mix(in srgb, #fff 24%, transparent) 48%, transparent 72%); transform: rotate(-7deg); opacity: .5; }
.lab-scenario-brief[hidden] { display: none; }
.lab-scenario-head { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: start; gap: 18px; padding: 2px 4px 28px; border-bottom: 1px solid color-mix(in srgb, var(--border) 82%, transparent); }
.lab-scenario-icon { position: relative; display: inline-grid; place-items: center; width: 52px; height: 52px; border: 1px solid color-mix(in srgb, #fff 40%, transparent); border-radius: 17px; color: #fff; background: linear-gradient(145deg, var(--scenario-blue), var(--scenario-cyan)); font-weight: 800; box-shadow: 0 17px 34px color-mix(in srgb, var(--primary) 22%, transparent), inset 0 1px 0 rgba(255,255,255,.38); transform: perspective(180px) rotateX(5deg) rotateY(-7deg); }
.lab-scenario-icon::after { content: ""; position: absolute; inset: 7px; border: 1px solid rgba(255,255,255,.16); border-radius: 11px; }
.lab-scenario-head .eyebrow { margin-top: 2px; }
.lab-scenario-head h2 { max-width: 28ch; margin: 8px 0 9px; color: var(--text-strong); font-size: clamp(1.8rem, 2.05vw, 2.2rem); font-weight: 700; line-height: 1.14; letter-spacing: -.022em; text-wrap: balance; }
.lab-scenario-head p { max-width: 920px; margin: 0; color: var(--text-muted); font-size: .96rem; font-weight: 400; line-height: 1.76; letter-spacing: 0; }
.lab-scenario-head > a { margin-top: 4px; color: var(--primary); font-size: .8rem; font-weight: 650; letter-spacing: 0; text-decoration: none; white-space: nowrap; }
.lab-scenario-head > a:hover { text-decoration: underline; }
.lab-scenario-connection { display: grid; grid-template-columns: minmax(250px, .48fr) minmax(0, 1.52fr); align-items: center; gap: 32px; margin-top: 22px; padding: 20px 22px; border: 1px solid color-mix(in srgb, var(--primary) 24%, var(--border)); border-radius: 19px; background: color-mix(in srgb, var(--bg-elevated) 78%, transparent); box-shadow: inset 0 1px 0 color-mix(in srgb, #fff 34%, transparent), 0 14px 36px color-mix(in srgb, var(--primary) 5%, transparent); backdrop-filter: blur(14px); }
.lab-scenario-connection > div { display: grid; gap: 7px; }
.lab-scenario-connection small, .lab-scenario-preset small, .lab-scenario-flow small { color: var(--text-faint); font-size: .64rem; font-weight: 780; letter-spacing: .095em; text-transform: uppercase; }
.lab-scenario-connection strong { color: var(--primary); font-size: 1.08rem; font-weight: 650; letter-spacing: -.012em; }
.lab-scenario-connection p { margin: 0; color: var(--text-muted); font-size: .86rem; font-weight: 400; line-height: 1.68; }

.lab-scenario-stage { --stage-tilt-x: 0deg; --stage-tilt-y: 0deg; position: relative; margin-top: 22px; padding: 28px 18px 34px; overflow: hidden; border: 1px solid color-mix(in srgb, var(--primary) 18%, var(--border)); border-radius: 23px; background: radial-gradient(ellipse at center 112%, color-mix(in srgb, var(--scenario-cyan) 15%, transparent), transparent 52%), linear-gradient(180deg, color-mix(in srgb, var(--bg-elevated) 76%, transparent), color-mix(in srgb, var(--bg-soft) 88%, transparent)); box-shadow: inset 0 1px 0 color-mix(in srgb, #fff 35%, transparent), inset 0 -26px 70px color-mix(in srgb, var(--primary) 5%, transparent); perspective: 1500px; transform: perspective(1700px) rotateX(var(--stage-tilt-x)) rotateY(var(--stage-tilt-y)); transform-style: preserve-3d; transition: transform .32s var(--ease), border-color .3s var(--ease); }
.lab-scenario-stage:hover { border-color: color-mix(in srgb, var(--primary) 34%, var(--border)); }
.lab-scenario-space { position: absolute; z-index: 0; inset: 0; overflow: hidden; pointer-events: none; transform-style: preserve-3d; }
.lab-scenario-grid { position: absolute; inset: 26% -12% -54%; opacity: .22; background-image: linear-gradient(color-mix(in srgb, var(--primary) 33%, transparent) 1px, transparent 1px), linear-gradient(90deg, color-mix(in srgb, var(--cyan) 28%, transparent) 1px, transparent 1px); background-size: 46px 34px; mask-image: linear-gradient(to top, #000, transparent 88%); transform: rotateX(63deg) translateZ(-75px) scale(1.18); transform-origin: center bottom; }
.lab-scenario-beam { position: absolute; top: 50%; right: 5%; left: 5%; height: 2px; border-radius: 999px; background: linear-gradient(90deg, color-mix(in srgb, var(--scenario-blue) 10%, transparent), var(--scenario-blue) 25%, var(--scenario-cyan) 53%, var(--scenario-violet) 77%, color-mix(in srgb, var(--scenario-blue) 10%, transparent)); box-shadow: 0 0 10px color-mix(in srgb, var(--scenario-cyan) 60%, transparent), 0 0 28px color-mix(in srgb, var(--scenario-blue) 26%, transparent); opacity: .66; transform: translateY(-50%) translateZ(-38px); }
.lab-scenario-pulse { position: absolute; z-index: 1; top: calc(50% - 5px); left: 5%; width: 10px; height: 10px; border: 2px solid color-mix(in srgb, #fff 80%, var(--scenario-cyan)); border-radius: 50%; background: var(--scenario-cyan); box-shadow: 0 0 0 5px color-mix(in srgb, var(--scenario-cyan) 12%, transparent), 0 0 24px 8px color-mix(in srgb, var(--scenario-cyan) 38%, transparent); opacity: 0; animation: labScenarioPulse 7.2s cubic-bezier(.45,.05,.2,1) infinite; }
.lab-scenario-pulse.pulse-b { animation-delay: -2.4s; background: var(--scenario-blue); box-shadow: 0 0 0 5px color-mix(in srgb, var(--scenario-blue) 12%, transparent), 0 0 24px 8px color-mix(in srgb, var(--scenario-blue) 35%, transparent); }
.lab-scenario-pulse.pulse-c { animation-delay: -4.8s; background: var(--scenario-violet); box-shadow: 0 0 0 5px color-mix(in srgb, var(--scenario-violet) 12%, transparent), 0 0 24px 8px color-mix(in srgb, var(--scenario-violet) 35%, transparent); }
.lab-scenario-flow { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 15px; margin: 0; padding: 0; list-style: none; transform: translateZ(26px); transform-style: preserve-3d; }
.lab-scenario-flow li { --card-depth: 0px; --card-turn: 0deg; --card-rise: 0px; position: relative; display: grid; align-content: start; gap: 9px; min-width: 0; min-height: 146px; padding: 18px 17px; overflow: visible; border: 1px solid color-mix(in srgb, var(--border) 82%, var(--primary)); border-radius: 19px; background: linear-gradient(145deg, color-mix(in srgb, var(--bg-elevated) 94%, transparent), color-mix(in srgb, var(--bg-soft) 82%, transparent)); box-shadow: 0 22px 44px color-mix(in srgb, #071226 13%, transparent), inset 0 1px 0 color-mix(in srgb, #fff 48%, transparent); backface-visibility: hidden; transform: translateY(var(--card-rise)) translateZ(var(--card-depth)) rotateY(var(--card-turn)); transform-style: preserve-3d; transition: transform .38s cubic-bezier(.2,.75,.25,1), border-color .3s var(--ease), box-shadow .3s var(--ease); }
.lab-scenario-flow li::before { content: ""; position: absolute; z-index: -1; inset: 8px; border-radius: 14px; background: radial-gradient(circle at 84% 8%, color-mix(in srgb, var(--engine-glow, var(--scenario-blue)) 15%, transparent), transparent 42%); transform: translateZ(-12px); }
.lab-scenario-flow li:nth-child(1) { --card-depth: -20px; --card-turn: 3.2deg; --card-rise: 7px; }
.lab-scenario-flow li:nth-child(2) { --card-depth: 5px; --card-turn: 1.45deg; }
.lab-scenario-flow li:nth-child(3) { --card-depth: 26px; --card-rise: -7px; }
.lab-scenario-flow li:nth-child(4) { --card-depth: 5px; --card-turn: -1.45deg; }
.lab-scenario-flow li:nth-child(5) { --card-depth: -20px; --card-turn: -3.2deg; --card-rise: 7px; }
.lab-scenario-flow li:hover { border-color: color-mix(in srgb, var(--engine-glow, var(--scenario-blue)) 50%, var(--border)); box-shadow: 0 30px 60px color-mix(in srgb, var(--engine-glow, var(--scenario-blue)) 16%, transparent), inset 0 1px 0 color-mix(in srgb, #fff 62%, transparent); transform: translateY(calc(var(--card-rise) - 8px)) translateZ(calc(var(--card-depth) + 24px)) rotateY(0deg); }
.lab-scenario-flow li:not(:last-child)::after { content: "→"; position: absolute; z-index: 5; inset: 50% -23px auto auto; width: 30px; height: 30px; border: 1px solid color-mix(in srgb, var(--primary) 28%, var(--border)); border-radius: 50%; color: var(--primary); background: color-mix(in srgb, var(--bg-elevated) 88%, transparent); box-shadow: 0 0 22px color-mix(in srgb, var(--primary) 18%, transparent); font: 800 .75rem/28px var(--font-mono); text-align: center; transform: translateY(-50%) translateZ(28px); backdrop-filter: blur(8px); }
[dir="rtl"] .lab-scenario-flow li:not(:last-child)::after { content: "←"; inset: 50% auto auto -23px; }
.lab-scenario-flow li > span { color: color-mix(in srgb, var(--engine-glow, var(--scenario-blue)) 88%, var(--text-strong)); font: 650 1rem/1 var(--font-mono); letter-spacing: -.03em; text-shadow: 0 0 18px color-mix(in srgb, var(--engine-glow, var(--scenario-blue)) 25%, transparent); transform: translateZ(16px); }
.lab-scenario-flow li > small { transform: translateZ(15px); }
.lab-scenario-flow li > strong { color: var(--text-strong); font-size: clamp(.82rem, .82vw, .9rem); font-weight: 600; line-height: 1.6; letter-spacing: 0; overflow-wrap: anywhere; text-wrap: pretty; transform: translateZ(18px); }
.lab-scenario-flow li[data-engine="cpu"] { --engine-glow: var(--scenario-blue); border-top-color: color-mix(in srgb, var(--scenario-blue) 70%, var(--border)); }
.lab-scenario-flow li[data-engine="gpu"] { --engine-glow: var(--scenario-cyan); border-top-color: color-mix(in srgb, var(--scenario-cyan) 78%, var(--border)); }
.lab-scenario-flow li[data-engine="qpu"] { --engine-glow: var(--scenario-violet); border-top-color: color-mix(in srgb, var(--scenario-violet) 74%, var(--border)); }
.lab-scenario-brief[data-route="gpu"] .lab-scenario-flow li[data-engine="gpu"], .lab-scenario-brief[data-route="hybrid"] .lab-scenario-flow li[data-engine] { border-color: color-mix(in srgb, var(--engine-glow) 52%, var(--border)); box-shadow: 0 30px 66px color-mix(in srgb, var(--engine-glow) 15%, transparent), inset 0 3px 0 var(--engine-glow), inset 0 1px 0 color-mix(in srgb, #fff 58%, transparent); animation: labScenarioRouteGlow 3.8s ease-in-out infinite; }
[dir="rtl"] .lab-scenario-pulse { animation-direction: reverse; }

.lab-scenario-preset { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin: 22px 4px 0; }
.lab-scenario-preset > div { display: grid; gap: 8px; min-width: 0; }
.lab-scenario-preset [data-lab-scenario-preset] { display: flex; flex-wrap: wrap; gap: 8px; }
.lab-scenario-preset [data-lab-scenario-preset] span { padding: 9px 12px; border: 1px solid color-mix(in srgb, var(--primary) 15%, var(--border)); border-radius: 999px; color: var(--text-strong); background: color-mix(in srgb, var(--bg-elevated) 88%, transparent); box-shadow: inset 0 1px 0 color-mix(in srgb, #fff 44%, transparent); font: 600 .74rem/1 var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: -.01em; }
.lab-scenario-preset > p { max-width: 440px; margin: 0; color: var(--text-faint); font-size: .76rem; font-weight: 400; line-height: 1.58; text-align: end; }
.lab-picker-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); align-items: end; gap: 48px; margin-bottom: 23px; }
.lab-picker-heading h2 { max-width: 720px; margin: 10px 0 0; color: var(--text-strong); font-size: clamp(1.9rem, 2.8vw, 3rem); line-height: 1.09; letter-spacing: -.035em; }
.lab-picker-heading > p { max-width: 560px; margin: 0 0 4px; color: var(--text-muted); font-size: 1rem; line-height: 1.65; }
.lab-experiment-picker { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 22px; }
.lab-experiment-picker button { position: relative; display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 12px; min-width: 0; min-height: 64px; padding: 10px 14px; border: 1px solid var(--border); border-radius: 15px; color: var(--text-muted); background: var(--bg-elevated); text-align: start; cursor: pointer; box-shadow: var(--shadow-sm); transition: transform .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease); }
.lab-experiment-picker button:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--primary) 42%, var(--border)); color: var(--text-strong); }
.lab-experiment-picker button:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 28%, transparent); outline-offset: 2px; }
.lab-experiment-picker button[aria-selected="true"] { color: var(--text-strong); border-color: color-mix(in srgb, var(--primary) 46%, var(--border)); background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 10%, var(--bg-elevated)), var(--bg-elevated)); box-shadow: 0 12px 30px color-mix(in srgb, var(--primary) 12%, transparent); }
.lab-experiment-picker button[aria-selected="true"]::after { content: ""; position: absolute; inset: auto 14px 8px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--primary), var(--cyan)); }
.lab-experiment-picker button > span { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; color: var(--primary); background: color-mix(in srgb, var(--primary) 9%, var(--bg-soft)); font: 800 .68rem/1 var(--font-mono); }
.lab-experiment-picker button strong { min-width: 0; font-size: .82rem; line-height: 1.25; }

.lab-workbench { padding: 26px; border: 1px solid var(--border); border-radius: 26px; background: color-mix(in srgb, var(--bg-elevated) 94%, transparent); box-shadow: var(--shadow-md); }
.lab-workbench-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 28px; padding: 4px 4px 28px; border-bottom: 1px solid var(--border); }
.lab-workbench-head > div:first-child { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 7px 13px; min-width: 0; }
.lab-experiment-index { grid-row: 1 / 4; display: inline-grid; place-items: center; align-self: start; width: 58px; height: 58px; border-radius: 17px; color: #fff; background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 55%, var(--cyan))); font: 850 .9rem/1 var(--font-mono); box-shadow: 0 12px 28px color-mix(in srgb, var(--primary) 22%, transparent); }
.lab-workbench-head .eyebrow { margin: 1px 0 0; }
.lab-workbench-head h2 { margin: 0; color: var(--text-strong); font-size: clamp(1.6rem, 2.15vw, 2.3rem); line-height: 1.1; letter-spacing: -.03em; }
.lab-workbench-head p[data-lab-summary] { max-width: 760px; margin: 2px 0 0; color: var(--text-muted); font-size: .94rem; line-height: 1.55; }
.lab-duration { display: flex; align-items: baseline; gap: 6px; flex: 0 0 auto; padding: 11px 13px; border: 1px solid var(--border); border-radius: 13px; background: var(--bg-soft); }
.lab-duration > span { color: var(--primary); }
.lab-duration strong { color: var(--text-strong); font: 850 1rem/1 var(--font-mono); }
.lab-duration small { color: var(--text-faint); font-size: .68rem; }
.lab-workbench-grid { display: grid; grid-template-columns: minmax(300px, .72fr) minmax(0, 1.5fr); gap: 20px; padding-top: 24px; }
.lab-controls, .lab-results { min-width: 0; padding: 20px; border: 1px solid var(--border); border-radius: 20px; background: var(--bg-soft); }
.lab-panel-heading { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 21px; }
.lab-panel-number { display: inline-grid; place-items: center; flex: 0 0 auto; width: 31px; height: 31px; border: 1px solid color-mix(in srgb, var(--primary) 25%, var(--border)); border-radius: 9px; color: var(--primary); background: color-mix(in srgb, var(--primary) 7%, var(--bg-elevated)); font: 800 .66rem/1 var(--font-mono); }
.lab-panel-heading h3, .lab-evidence-card h3 { margin: 0; color: var(--text-strong); font-size: 1.08rem; line-height: 1.25; }
.lab-panel-heading p { margin: 4px 0 0; color: var(--text-faint); font-size: .72rem; line-height: 1.45; }
.lab-control-list { display: grid; gap: 17px; margin-bottom: 20px; }
.lab-control { display: grid; gap: 9px; }
.lab-control-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.lab-control label { color: var(--text-strong); font-size: .78rem; font-weight: 650; }
.lab-control output { color: var(--primary); font: 750 .72rem/1 var(--font-mono); }
.lab-control input[type="range"] { width: 100%; height: 40px; margin: -6px 0; accent-color: var(--primary); cursor: pointer; }
.lab-control-scale { display: flex; justify-content: space-between; color: var(--text-faint); font-size: .61rem; }
.lab-task-choices { display: grid; gap: 7px; }
.lab-task-choice { position: relative; }
.lab-task-choice input { position: absolute; opacity: 0; pointer-events: none; }
.lab-task-choice label { display: flex; align-items: center; gap: 9px; min-height: 40px; padding: 8px 11px; border: 1px solid var(--border); border-radius: 11px; color: var(--text-muted); background: var(--bg-elevated); cursor: pointer; transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease); }
.lab-task-choice label::before { content: ""; width: 14px; height: 14px; border: 2px solid var(--border-strong); border-radius: 50%; box-shadow: inset 0 0 0 3px var(--bg-elevated); }
.lab-task-choice input:checked + label { color: var(--text-strong); border-color: color-mix(in srgb, var(--primary) 50%, var(--border)); background: color-mix(in srgb, var(--primary) 7%, var(--bg-elevated)); }
.lab-task-choice input:checked + label::before { border-color: var(--primary); background: var(--primary); }
.lab-task-choice input:focus-visible + label { outline: 3px solid color-mix(in srgb, var(--primary) 26%, transparent); outline-offset: 2px; }
.lab-controls .button { margin-top: 5px; }
.lab-recommendation { display: grid; grid-template-columns: minmax(180px, .45fr) minmax(0, 1.55fr); gap: 18px; align-items: center; margin-bottom: 15px; padding: 17px 18px; border: 1px solid color-mix(in srgb, var(--primary) 27%, var(--border)); border-radius: 17px; background: linear-gradient(120deg, color-mix(in srgb, var(--primary) 9%, var(--bg-elevated)), color-mix(in srgb, var(--cyan) 5%, var(--bg-elevated))); }
.lab-recommendation > div { display: grid; gap: 4px; }
.lab-recommendation small { color: var(--text-faint); font-size: .62rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.lab-recommendation strong { color: var(--primary); font-size: 1.35rem; line-height: 1; }
.lab-recommendation p { margin: 0; color: var(--text-muted); font-size: .78rem; line-height: 1.52; }
.lab-engine-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.lab-engine-card { position: relative; min-width: 0; padding: 17px 15px 14px; border: 1px solid var(--border); border-radius: 17px; background: var(--bg-elevated); overflow: hidden; }
.lab-engine-card.is-route { border-color: color-mix(in srgb, var(--engine-color) 55%, var(--border)); box-shadow: inset 0 3px 0 var(--engine-color), 0 10px 28px color-mix(in srgb, var(--engine-color) 9%, transparent); }
.lab-engine-card[data-engine="cpu"] { --engine-color: #4f5cff; }
.lab-engine-card[data-engine="gpu"] { --engine-color: #0ea5e9; }
.lab-engine-card[data-engine="qpu"] { --engine-color: #9b5cff; }
.lab-engine-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 13px; }
.lab-engine-head h4 { margin: 0; color: var(--text-strong); font: 900 1rem/1 var(--font-mono); letter-spacing: .06em; }
.lab-engine-head span { color: var(--engine-color); font-size: .59rem; font-weight: 850; letter-spacing: .09em; text-transform: uppercase; }
.lab-engine-note { min-height: 54px; margin: 0 0 13px; color: var(--text-muted); font-size: .69rem; line-height: 1.45; }
.lab-metric-list { display: grid; gap: 8px; margin: 0; }
.lab-metric { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 4px 9px; padding-top: 8px; border-top: 1px solid var(--border); }
.lab-metric dt { color: var(--text-faint); font-size: .6rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.lab-metric dd { grid-row: 1 / 3; grid-column: 2; margin: 0; overflow-wrap: anywhere; color: var(--text-strong); font: 750 .72rem/1.25 var(--font-mono); text-align: end; }
.lab-source { display: inline-flex; align-items: center; width: max-content; padding: 4px 6px; border: 1px solid var(--border); border-radius: 999px; font-size: .51rem; font-weight: 850; letter-spacing: .06em; text-transform: uppercase; }
.lab-source-theoretical { color: #7c62d9; background: color-mix(in srgb, #7c62d9 8%, var(--bg-elevated)); }
.lab-source-simulated { color: #138ca6; background: color-mix(in srgb, #13b8d4 8%, var(--bg-elevated)); }
.lab-source-measured { color: #16835e; background: color-mix(in srgb, #10b981 8%, var(--bg-elevated)); }
.lab-source-recorded-qpu { color: #a34db4; background: color-mix(in srgb, #a855f7 8%, var(--bg-elevated)); }
.lab-evidence-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 20px; }
.lab-evidence-card { display: grid; grid-template-columns: auto 1fr; align-content: start; gap: 8px 12px; min-width: 0; padding: 21px; border: 1px solid var(--border); border-radius: 20px; background: var(--bg-soft); }
.lab-evidence-card .lab-panel-number { grid-row: 1 / 4; }
.lab-evidence-card p { grid-column: 2; margin: 0; color: var(--text-muted); font-size: .76rem; line-height: 1.55; }
.lab-evidence-card .lab-formula { margin-top: 5px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; color: var(--text-strong); background: var(--bg-elevated); font: 750 .72rem/1.45 var(--font-mono); }
.lab-source-legend { grid-column: 2; display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }

@keyframes labRoute { to { stroke-dashoffset: -150; } }
@keyframes labScenarioPulse { 0% { left: 5%; opacity: 0; transform: scale(.7); } 9% { opacity: .95; } 48% { transform: scale(1.16); } 91% { opacity: .95; } 100% { left: 94%; opacity: 0; transform: scale(.7); } }
@keyframes labScenarioRouteGlow { 0%, 100% { filter: saturate(.9); } 50% { filter: saturate(1.2); } }

@media (max-width: 1160px) {
  .lab-hero-grid { grid-template-columns: 1fr 1fr; gap: 42px; }
  .lab-route-visual { min-height: 430px; }
  .lab-workbench-grid { grid-template-columns: minmax(280px, .65fr) minmax(0, 1.35fr); }
  .lab-engine-grid { grid-template-columns: 1fr; }
  .lab-engine-note { min-height: 0; }
}
@media (max-width: 960px) {
  .lab-hero { min-height: auto; padding-top: calc(var(--header-h) + 76px); }
  .lab-hero-grid { grid-template-columns: 1fr; }
  .lab-hero-copy { max-width: 790px; }
  .lab-route-visual { width: min(680px, 100%); margin-inline: auto; }
  .lab-picker-heading { grid-template-columns: 1fr; gap: 16px; }
  .lab-experiment-picker { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-workbench-grid { grid-template-columns: 1fr; }
  .lab-control-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-scenario-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-scenario-flow li:last-child { grid-column: 1 / -1; min-height: auto; }
  .lab-scenario-flow li::after { display: none; }
  .lab-scenario-stage { padding: 20px; transform: none; }
  .lab-scenario-beam, .lab-scenario-pulse { display: none; }
  .lab-scenario-flow { transform: none; }
  .lab-scenario-flow li, .lab-scenario-flow li:nth-child(n) { --card-depth: 0px; --card-turn: 0deg; --card-rise: 0px; transform: none; }
  .lab-scenario-flow li:hover { transform: translateY(-4px); }
}
@media (max-width: 760px) {
  .lab-hero { padding-top: calc(var(--header-h) + 50px); padding-bottom: 60px; }
  .lab-hero h1 { font-size: clamp(1.95rem, 8.1vw, 2.55rem); }
  .lab-lead { font-size: .98rem; line-height: 1.64; }
  .lab-route-visual { min-height: 350px; border-radius: 24px; }
  .lab-route-core { width: 145px; height: 145px; }
  .lab-route-node { min-width: 112px; padding: 11px 12px; }
  .lab-route-cpu { inset: 35px auto auto 18px; }
  .lab-route-gpu { inset: 35px 18px auto auto; }
  .lab-route-qpu { bottom: 22px; }
  .lab-section { padding-top: 60px; }
  .lab-scenario-brief { margin-bottom: 36px; padding: 21px 16px; border-radius: 23px; }
  .lab-scenario-head { grid-template-columns: auto minmax(0, 1fr); }
  .lab-scenario-head > a { grid-column: 2; }
  .lab-scenario-connection { grid-template-columns: 1fr; gap: 10px; }
  .lab-scenario-stage { margin-top: 18px; padding: 15px; border-radius: 19px; }
  .lab-scenario-flow { gap: 11px; }
  .lab-scenario-flow li { min-height: 132px; padding: 16px; }
  .lab-scenario-preset { align-items: flex-start; flex-direction: column; }
  .lab-scenario-preset > p { max-width: none; text-align: start; }
  .lab-experiment-picker { display: flex; overflow-x: auto; padding-bottom: 7px; scrollbar-width: none; }
  .lab-experiment-picker::-webkit-scrollbar { display: none; }
  .lab-experiment-picker button { flex: 0 0 250px; }
  .lab-workbench { padding: 18px 14px; border-radius: 24px; }
  .lab-workbench-head { flex-direction: column; }
  .lab-duration { margin-inline-start: 71px; }
  .lab-control-list { grid-template-columns: 1fr; }
  .lab-recommendation { grid-template-columns: 1fr; }
  .lab-evidence-grid { grid-template-columns: 1fr; }
  .lab-control input[type="range"], .lab-task-choice label { min-height: 44px; height: 44px; }
}
@media (max-width: 480px) {
  .lab-route-visual { min-height: 320px; }
  .lab-route-core { width: 122px; height: 122px; padding: 16px; }
  .lab-route-core strong { font-size: 1rem; }
  .lab-route-node { min-width: 94px; }
  .lab-route-node span { display: none; }
  .lab-route-cpu { inset-inline-start: 13px; }
  .lab-route-gpu { inset-inline-end: 13px; }
  .lab-picker-heading h2 { font-size: clamp(1.68rem, 7.3vw, 2.1rem); line-height: 1.13; }
  .lab-workbench-head > div:first-child { grid-template-columns: auto minmax(0, 1fr); }
  .lab-experiment-index { width: 52px; height: 52px; }
  .lab-workbench-head h2 { font-size: 1.4rem; line-height: 1.15; }
  .lab-duration { margin-inline-start: 65px; }
  .lab-scenario-head { grid-template-columns: 1fr; }
  .lab-scenario-head > a { grid-column: auto; }
  .lab-scenario-icon { width: 42px; height: 42px; }
  .lab-scenario-head h2 { font-size: 1.55rem; line-height: 1.18; }
  .lab-scenario-head p { font-size: .9rem; line-height: 1.7; }
  .lab-scenario-connection p { font-size: .8rem; }
  .lab-scenario-flow { grid-template-columns: 1fr; }
  .lab-scenario-flow li:last-child { grid-column: auto; }
  .lab-scenario-flow li { min-height: auto; }
  .lab-scenario-grid { inset: 0; transform: none; opacity: .12; }
  .lab-controls, .lab-results { padding: 18px 14px; }
  .lab-engine-card { padding-inline: 13px; }
}
@media (prefers-reduced-motion: reduce) {
  .lab-route-visual > svg path { animation: none; }
  .lab-scenario-stage { transform: none !important; transition: none; }
  .lab-scenario-pulse, .lab-scenario-brief[data-route] .lab-scenario-flow li[data-engine] { animation: none; }
  .lab-scenario-pulse { display: none; }
}