.pc-lab{--pc-ink:#203f45;--pc-teal:#197d72;color:var(--pc-ink);font-family:Helvetica,Arial,sans-serif}
.pc-lab *{box-sizing:border-box}.pc-header{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:24px}.pc-kicker,.pc-step{font-size:12px;font-weight:750;letter-spacing:.1em;text-transform:uppercase;color:var(--pc-teal)}.pc-lab .pc-header h2{font-size:clamp(26px,3vw,38px);letter-spacing:-.04em;margin:8px 0;line-height:1.15;color:var(--pc-ink)}.pc-lab p{font-style:normal;line-height:1.6}.pc-header p{margin:0;color:#627b80;font-size:16px}.pc-tag{padding:10px 14px;border-radius:30px;background:#edf6f1;font-size:12px;white-space:nowrap;color:#38786c}.pc-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(290px,1fr);gap:22px;align-items:start}.pc-experiment,.pc-card{border:1px solid #dbe7e3;border-radius:20px;background:#fff;box-shadow:0 8px 24px #294d4407}.pc-experiment{padding:20px;background:linear-gradient(145deg,#fbfdfb,#f1f6f3)}.pc-stage-heading{display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:15px}.pc-stage-heading span{font-size:12px;color:#3b786b;background:#e4f1eb;border-radius:20px;padding:7px 10px}.pc-apparatus{display:block;width:100%;height:auto;margin:14px auto 4px;overflow:visible}.pc-apparatus text{font-family:Helvetica,Arial,sans-serif;font-size:14px}.pc-apparatus .pc-lane-name{font-size:15px;fill:#556a67;font-weight:700}.pc-ruler text{font-size:12px;fill:#60776f}.pc-apparatus .pc-baseline-label{font-size:12px;fill:#6d746d}.pc-bottom-label{fill:#4f776d}.pc-tools{display:grid;gap:16px}.pc-card{padding:22px}.pc-lab h3{font-size:19px;margin:8px 0 16px;color:var(--pc-ink)}.pc-lab button,.pc-lab select,.pc-lab input{font:inherit}.pc-lab button{min-height:44px;border:1px solid #cbded7;border-radius:11px;padding:10px 16px;background:#fff;color:#315d55;font-size:14px;font-weight:700;cursor:pointer}.pc-lab button:hover{background:#edf7f1;border-color:#68a593}.pc-lab button:disabled{opacity:.45;cursor:not-allowed}.pc-lab .pc-primary{background:var(--pc-teal);color:white;border-color:var(--pc-teal)}.pc-lab :is(button,input,select):focus-visible{outline:3px solid #62aa9c;outline-offset:3px}.pc-playback{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.pc-playback label{display:flex;align-items:center;gap:6px;margin-left:auto;font-size:13px}.pc-lab select{min-height:44px;padding:8px;border:1px solid #cbded7;border-radius:10px;background:white;color:#315d55;max-width:100%}.pc-progress{display:flex;flex-wrap:wrap;justify-content:space-between;font-size:13px;color:#55766d;margin-top:18px;gap:10px}.pc-progress input{width:100%;accent-color:var(--pc-teal);min-height:24px}.pc-select-label{display:grid;gap:8px;font-size:14px;font-weight:650}.pc-lab .pc-muted{font-size:13px;color:#667e7b;margin:12px 0}.pc-tip{padding:14px;border-radius:12px;background:#f4f7ef;margin-top:16px;font-size:13px;color:#536b53}.pc-tip p{margin:6px 0}.pc-tip small{font-size:12px}.pc-dye-tabs{display:flex;gap:6px}.pc-dye-tabs button{flex:1;padding:9px 6px}.pc-dye-tabs i{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--dye);margin-right:6px}.pc-dye-tabs button[aria-pressed=true]{border-color:var(--dye);background:#f4f8f7;box-shadow:inset 0 0 0 1px var(--dye)}.pc-measurements{margin:16px 0}.pc-measurements>div{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid #e6ede9;padding:10px 0;font-size:13px}.pc-measurements dd{margin:0;font-weight:750;font-variant-numeric:tabular-nums;white-space:nowrap}.pc-formula{padding:12px;background:#edf6f2;border-radius:10px;color:#266b5d;font-size:14px;margin:14px 0}.pc-lab form label{font-size:14px;display:block;margin-bottom:8px}.pc-answer-row{display:flex;gap:8px}.pc-answer-row input{width:0;flex:1;min-height:44px;padding:10px;border:1px solid #cbded7;border-radius:10px;background:white}.pc-feedback{font-size:13px;min-height:40px;color:#426d61;margin:12px 0 0}.pc-conclusion{padding:22px 24px;margin-top:22px;border-radius:18px;background:#edf5f0;border:1px solid #d7e8df}.pc-conclusion h3{margin-bottom:8px}.pc-conclusion p{margin:6px 0;font-size:15px}.pc-source{font-size:12px;color:#75857d;margin:16px 0 0}.pc-source a{color:#397f70}
@media(max-width:850px){.pc-layout{grid-template-columns:1fr}.pc-header{align-items:flex-start}.pc-tag{display:none}.pc-tools{grid-template-columns:1fr 1fr}.pc-apparatus{max-width:660px}}
@media(max-width:580px){.pc-tools{grid-template-columns:1fr}.pc-experiment{padding:12px}.pc-card{padding:18px}.pc-stage-heading{font-size:13px}.pc-stage-heading span{font-size:11px}.pc-playback label{margin-left:0}.pc-header{margin-bottom:18px}.pc-header p{font-size:14px}.pc-conclusion{padding:18px}.pc-apparatus{min-width:0}}
@media(prefers-reduced-motion:reduce){.pc-lab *{scroll-behavior:auto}}
.pc-sequence{display:flex;flex-wrap:wrap;gap:5px;margin:8px 0}.pc-sequence span{padding:6px 8px;border-radius:8px;background:#eaf0ed;color:#697f77;font-size:11px;font-weight:700}.pc-sequence .is-current{background:#197d72;color:#fff}.pc-lab .pc-stage-copy{font-size:14px;color:#365f56;line-height:1.5;min-height:63px;margin:12px 0 16px;padding:12px;border-left:3px solid #64a991;background:#edf6f0;border-radius:0 9px 9px 0}.pc-select-label+.pc-select-label{margin-top:14px}