:root{color-scheme:light;--ink:#142038;--muted:#626d80;--paper:#f5f7fa;--line:#e0e6ee;--lime:#c5f36a;--navy:#111c32;--green:#1e7254;--red:#bd3645;font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink)}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #4d78dc;outline-offset:3px}button:disabled{cursor:default}a{color:inherit}.topbar{max-width:1080px;margin:auto;padding:24px 30px;display:flex;align-items:center;gap:16px}.brand{text-decoration:none;font-size:27px;font-weight:800;letter-spacing:-1.2px;display:flex;align-items:center;gap:10px}.brand-icon{background:var(--navy);color:var(--lime);width:40px;height:40px;border-radius:12px;text-align:center;font-size:32px;line-height:36px;font-weight:500}.brand-dot{color:#67a125;margin-left:-9px}.topnote{font-size:14px;color:var(--muted);margin-left:auto}.icon-button{border:1px solid var(--line);border-radius:50%;background:white;width:36px;height:36px;font-weight:700}main{max-width:1020px;padding:24px 30px 130px;margin:auto}h1{font-size:clamp(30px,5vw,44px);line-height:1.14;letter-spacing:-1.5px;margin:10px 0 12px}h2{font-size:22px;letter-spacing:-.5px;margin:0 0 18px}h3{margin:0 0 10px;font-size:18px}p{line-height:1.6}small,.muted{color:var(--muted)}.eyebrow{font-size:12px;letter-spacing:1.8px;font-weight:750;color:var(--muted)}.intro{margin-bottom:28px}.intro p{margin:0;color:var(--muted)}.workspace{display:grid;grid-template-columns:1.4fr 1fr;gap:24px}.panel{background:white;border:1px solid var(--line);border-radius:24px;padding:26px}.start-panel{background:var(--navy);color:white;border:0;position:relative;overflow:hidden}.start-panel .eyebrow,.start-panel .muted{color:#afbacd}.start-panel h2{font-size:28px;margin:12px 0 7px}.round-head{display:flex;align-items:center;justify-content:space-between}.round-badge{border:1px solid #3d4960;color:var(--lime);border-radius:10px;padding:8px 12px;font-size:14px}.start-panel p{margin:8px 0 24px;color:#afbacd}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin:10px 0 24px}.mode{color:#c4cede;background:#1b2942;border:1px solid #344058;border-radius:12px;padding:13px 10px;text-align:left;font-size:14px}.mode.selected{background:var(--lime);border-color:var(--lime);color:var(--navy);font-weight:700}.mode:first-child{grid-column:1/-1}.select-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:18px 0;font-size:14px}.select-row select{background:#1b2942;color:white;border:1px solid #455169;border-radius:10px;padding:9px;max-width:64%}.button{padding:15px 20px;border:0;border-radius:12px;background:var(--lime);color:var(--navy);font-weight:750;min-height:48px}.button.full{width:100%}.button.secondary{background:#edf1f6;color:var(--ink)}.button.dark{background:var(--navy);color:white}.button:disabled{opacity:.5}.section-top{display:flex;justify-content:space-between;align-items:center;margin:0 0 18px;gap:10px}.section-top h2{margin:0}.text-button{border:0;background:none;padding:8px 0;color:var(--muted);font-size:14px}.mini-stats{display:flex;gap:20px;border-bottom:1px solid var(--line);padding:2px 0 22px;margin-bottom:20px}.big-number{font-size:32px;font-weight:750;letter-spacing:-1px;display:block}.mini-stats small{font-size:13px}.molecule-tile{background:#f3f6fa;border-radius:18px;padding:17px;display:flex;gap:12px;align-items:center}.molecule-tile img{width:130px;height:115px;object-fit:contain}.molecule-tile .code{font-size:30px;font-weight:800}.pill{display:inline-block;font-size:12px;padding:5px 9px;border-radius:7px;background:#e8edf4;color:#51627a;font-weight:650}.pill.nonpolar{background:#edf4dc;color:#52682c}.pill.polar{background:#e0eefb;color:#38608e}.pill.acidic{background:#fce6e7;color:#a43845}.pill.basic{background:#eee6fb;color:#73519f}.pill.special{background:#fcf0d8;color:#896620}.tip{font-size:14px;color:var(--muted);line-height:1.6;margin:18px 0 0}.bottom-nav{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);display:flex;padding:7px;background:var(--navy);border-radius:20px;box-shadow:0 10px 30px #111c3226;z-index:10;gap:4px}.bottom-nav button{border:0;border-radius:13px;background:none;color:#aeb9ce;padding:11px 22px;font-size:14px;display:flex;gap:9px;align-items:center;white-space:nowrap}.bottom-nav button.active{background:#2b3b52;color:var(--lime)}.bottom-nav span{font-size:22px}.quiz-wrap{max-width:680px;margin:auto}.quiz-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;font-size:14px}.bar{height:6px;background:#e0e6ee;border-radius:5px;overflow:hidden}.bar span{display:block;height:100%;background:#96c944;transition:width .3s}.question-panel{margin-top:24px}.question-panel h1{font-size:27px;letter-spacing:-.7px;margin:18px 0}.prompt-display{text-align:center;background:#f3f6fa;border-radius:18px;margin:20px 0;padding:22px;font-size:44px;font-weight:750;letter-spacing:-1px}.prompt-display.words{font-size:26px}.prompt-display img{width:100%;height:200px;object-fit:contain}.answers{display:grid;grid-template-columns:1fr 1fr;gap:10px}.answer{border:1px solid var(--line);border-radius:13px;background:white;text-align:left;padding:16px;min-height:64px;display:flex;align-items:center;gap:12px;color:var(--ink);font-size:16px}.answer .letter{font-size:12px;color:#788395;background:#f0f3f7;padding:4px 7px;border-radius:5px}.answer:hover:not(:disabled){border-color:#7c9e45;background:#f8fbed}.answer.correct{border-color:#77a991;background:#e7f4ec;color:#1e6045}.answer.wrong{border-color:#d59299;background:#fff0f0;color:#ad3542}.answer:disabled{opacity:1}.feedback{margin-top:20px;border-radius:14px;padding:18px;background:#eef6e8;line-height:1.6}.feedback.bad{background:#fff0f0}.feedback p{font-size:14px;margin:7px 0 15px}.feedback .button{width:100%}.quiz-foot{font-size:13px;color:var(--muted);text-align:center;margin-top:18px}.tools{display:flex;gap:12px;margin:25px 0 20px;flex-wrap:wrap}input[type=search]{flex:1;min-width:180px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:white;color:var(--ink)}.tools select{border:1px solid var(--line);border-radius:12px;background:white;padding:12px;color:var(--ink)}.catalog{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.amino-card{border:1px solid var(--line);background:white;border-radius:18px;padding:18px;text-align:left;color:var(--ink)}.card-top{display:flex;justify-content:space-between;align-items:center}.card-code{font-size:28px;font-weight:800}.card-three{font-size:14px;color:var(--muted)}.amino-card img{width:100%;height:115px;object-fit:contain;margin:4px 0}.amino-card h3{font-size:16px;margin:0 0 10px}.catalog-note{font-size:14px;color:var(--muted);line-height:1.7}.detail-codes{display:flex;gap:12px;align-items:center;font-size:22px;margin:16px 0}.detail img{width:100%;max-height:260px;object-fit:contain;background:#f5f7fa;border-radius:16px}.facts{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:20px 0}.fact{background:#f3f6fa;border-radius:12px;padding:14px;overflow-wrap:anywhere}.fact small{display:block;margin-bottom:6px}.detail p{font-size:15px}.formula{white-space:nowrap}.formula sub{font-size:.65em}.result{max-width:600px;margin:auto;text-align:center}.result-score{font-size:72px;font-weight:800;letter-spacing:-4px;padding:30px 0 8px}.result-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin:24px 0}.review-item{text-align:left;border-top:1px solid var(--line);padding:16px 0;font-size:14px;line-height:1.7}.review-item strong{display:block}.progress-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.progress-row{background:white;border:1px solid var(--line);border-radius:14px;padding:16px}.progress-row .bar{margin-top:12px}.empty{padding:35px 20px;text-align:center;color:var(--muted);grid-column:1/-1}.reset{border:1px solid var(--line);background:white;border-radius:10px;padding:11px;color:var(--red);font-size:14px}dialog{border:0;border-radius:24px;width:min(620px,calc(100% - 28px));max-height:90dvh;padding:28px;color:var(--ink);box-shadow:0 24px 80px #111c3240}dialog::backdrop{background:#111c3280;backdrop-filter:blur(4px)}dialog .button{margin-top:16px}dialog h2{margin-bottom:12px}dialog a{color:#365ca0}dialog p,dialog li{font-size:15px;line-height:1.7}.sr-status{color:var(--muted);font-size:14px}.overview{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0}.overview .panel{padding:20px}.save-warning{background:#fff0d7;padding:12px;font-size:14px;border-radius:10px;margin-bottom:15px}@media(min-width:800px){.amino-card:hover{transform:translateY(-2px);box-shadow:0 5px 20px #1420380a}.amino-card{transition:transform .15s}}@media(max-width:700px){.topbar{padding:18px 20px}.topnote{display:none}.icon-button{margin-left:auto}main{padding:16px 20px 110px}.intro{margin-bottom:24px}.intro p{font-size:15px}.workspace{grid-template-columns:1fr;gap:18px}.panel{padding:22px;border-radius:20px}.start-panel h2{font-size:25px}.bottom-nav{bottom:0;left:0;transform:none;width:100%;border-radius:20px 20px 0 0;justify-content:space-around;padding:9px 5px calc(9px + env(safe-area-inset-bottom))}.bottom-nav button{flex-direction:column;gap:4px;padding:7px 10px;flex:1;font-size:12px}.bottom-nav span{font-size:21px}.catalog{grid-template-columns:1fr 1fr;gap:10px}.amino-card{padding:14px}.amino-card h3{font-size:14px;overflow-wrap:anywhere}.amino-card img{height:100px}.card-code{font-size:24px}.pill{font-size:12px}.answers{grid-template-columns:1fr}.answer{min-height:56px;padding:13px}.question-panel h1{font-size:25px}.prompt-display{padding:18px;margin:16px 0}.prompt-display img{height:180px}.progress-list{grid-template-columns:1fr}.overview{gap:8px}.overview .panel{padding:14px}.overview small{font-size:12px}.overview .big-number{font-size:27px}.facts{grid-template-columns:1fr 1fr}.quiz-toolbar{gap:8px}.result-score{font-size:60px}dialog{padding:22px}.mini-stats{justify-content:space-between}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:16px}.map{margin-bottom:22px;border:1px solid var(--line);background:white;padding:18px;border-radius:16px}.map summary{font-weight:700;cursor:pointer}.map-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px}.map-group{border:1px solid var(--line);border-radius:12px;background:#f5f7fa;padding:14px;text-align:left;color:var(--ink)}.map-group strong{display:block;font-size:14px;margin-bottom:8px}.map-group span{font-size:14px;color:var(--muted)}

.prompt-display.description{font-size:19px;font-weight:550;line-height:1.6;letter-spacing:0;text-align:left}
@media(min-width:701px){.topnote{display:none}.topbar .icon-button{margin-left:auto}.bottom-nav{top:19px;bottom:auto;border-radius:16px;padding:6px;box-shadow:none}.bottom-nav button{padding:9px 16px}.topbar{min-height:88px}}