/* Readable teaching diagrams use an opaque light canvas in every theme. */
.discovery-art{display:grid;place-items:center;background:#173c3a}
.discovery-art svg{height:100%;width:100%}.fourcolor-art svg{width:85%;padding:15px}
.discovery-hero{display:grid;grid-template-columns:1.3fr 1fr;gap:28px;align-items:center;padding:clamp(24px,5vw,50px);border-radius:24px;background:#173c3a;color:#f2faf6}
.discovery-hero h1{font-size:clamp(1.8rem,4vw,3.1rem);line-height:1.18;letter-spacing:-.03em;margin:14px 0}
.discovery-hero p{line-height:1.85;color:#d7e8df}.discovery-hero small{color:#d7e8df}.discovery-hero>div>span{font-size:.72rem;letter-spacing:.09em;color:#b3dfcf;font-weight:750}
.color-hero{background:#293c58}.color-hero>div>span{color:#f4cf72}
.discovery-cover svg{display:block;width:100%;max-height:260px;border-radius:14px}
.discovery-note,.discovery-history{background:var(--panel-solid);color:var(--text);border:1px solid var(--line);border-radius:20px;padding:clamp(22px,4vw,36px)}
.discovery-note{border-left:5px solid var(--accent)}
.discovery-note p,.discovery-history p{line-height:1.85;margin:10px 0 0;color:var(--text)}
.discovery-note details{margin-top:15px}.discovery-note summary{cursor:pointer;line-height:1.6;color:var(--accent-ink);font-weight:700;padding:8px 0}
.discovery-history h2{font-size:1.4rem;margin:0 0 20px}.discovery-history ol{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:0}
.discovery-history li{border-top:2px solid var(--accent);padding-top:15px}.discovery-history b{line-height:1.6}
.discovery-lab{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:24px;padding:clamp(20px,4vw,34px);border-radius:22px;background:#eef4f7;color:#22364c;border:1px solid #bfceda}
.discovery-lab h2{font-size:clamp(1.25rem,2.5vw,1.6rem);line-height:1.35;margin:10px 0}
.lab-copy>p{font-size:.9rem;line-height:1.85;color:#344b60}.lab-kicker{font-size:.7rem;font-weight:800;letter-spacing:.06em;color:#36556b}
.lab-figure{margin:0;min-width:0;align-self:center}.lab-figure svg{display:block;width:100%;height:auto;background:#fff;border-radius:12px}.lab-figure svg text{fill:#24364c;font:13px system-ui,sans-serif}.lab-figure figcaption{color:#42566c;font-size:.78rem;line-height:1.7;margin-top:12px}
.lab-range{display:grid;gap:8px;margin:18px 0;color:#24364c;font-size:.85rem;font-weight:650}
.discovery-lab .lab-range input[type=range]{display:block;width:100%;min-width:0;min-height:44px;margin:0;accent-color:#255e7e;cursor:pointer;background:transparent;color:#24364c}
.discovery-lab output{display:grid;gap:7px;padding:16px;background:#fff;color:#213950;border:1px solid #c4d4de;border-radius:12px;line-height:1.6;font-size:.83rem;margin:14px 0;min-height:88px}
.discovery-lab output strong{font-size:1.2rem;color:#183b55}
:root .discovery-lab .lab-action{min-height:44px;border:1px solid #71899e;border-radius:10px;padding:10px 14px!important;background:#fff!important;background-image:none!important;color:#24364c!important;font-family:inherit;font-size:.85rem;font-weight:650;line-height:1.4;cursor:pointer;text-shadow:none;box-shadow:none}
:root .discovery-lab .lab-action:hover{background:#e1ebf1!important;color:#152b40!important}
.lab-actions,.region-controls,.color-palette{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
:root .color-palette .lab-action{background:var(--paint)!important;color:#182a3b!important}
:root .color-palette .lab-action[aria-pressed=true]{outline:3px solid #253d53;outline-offset:2px}
.discovery-lab :is(button,input):focus-visible,.paint-region:focus-visible{outline:3px solid #214e9b!important;outline-offset:4px}
.paint-region{cursor:pointer}.paint-region text{pointer-events:none;font-size:19px!important;font-weight:800!important}
.paint-region:hover polygon,.paint-region:focus-visible polygon{stroke:#101c2b;stroke-width:6}
@media(max-width:760px){.discovery-hero,.discovery-lab,.discovery-history ol{grid-template-columns:1fr}.discovery-cover{max-width:350px;width:100%;justify-self:center}.lab-figure{order:2}.discovery-lab{gap:18px}.lab-figure figcaption{font-size:.82rem}.discovery-hero h1{font-size:2rem}}
@media(prefers-reduced-motion:reduce){.discovery-lab *{transition:none!important}}