:root{--ink:#122e39;--muted:#526772;--teal:#126e71;--lime:#cbf681;--paper:#f3f6f8;--line:#d9e2e6;--white:#fff;--blue:#e9f2fa;--danger:#86530d;--radius:20px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--ink);font-size:16px;background:var(--paper)}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.4}button,a,input,select,textarea,summary{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #087e9a}h1,h2,h3,h4,p{margin-top:0}h1{font-size:clamp(1.8rem,3vw,2.55rem);line-height:1.12;letter-spacing:-.045em;font-weight:760;margin-bottom:12px}h2{font-size:1.22rem;letter-spacing:-.02em}h3{font-size:1.05rem}p{line-height:1.55}svg{display:block;flex-shrink:0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip{position:fixed;top:-80px;left:12px;z-index:100;background:var(--ink);color:white;padding:12px}.skip:focus{top:12px}.header{height:80px;padding:0 max(24px,calc((100vw - 1320px)/2));background:white;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{border:0;background:transparent;display:flex;align-items:center;gap:12px;padding:0;text-align:left;font-size:1.22rem;font-weight:760;letter-spacing:-.04em}.brand-icon{background:var(--ink);color:var(--lime);border-radius:12px;width:44px;height:44px;display:grid;place-items:center}.brand-icon svg{width:30px;height:30px}.brand small{display:block;font-size:.66rem;letter-spacing:.17em;margin-top:3px;font-weight:650;color:var(--muted)}.header-end{display:flex;align-items:center;gap:18px}.session-note{font-size:.78rem;color:var(--muted)}.course-pill{border:1px solid var(--line);border-radius:99px;padding:7px 14px;font-size:.88rem}.home{max-width:1320px;margin:0 auto;padding:30px 24px 20px}.intro{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:24px}.eyebrow{font-size:.72rem;font-weight:750;letter-spacing:.15em;display:block;margin-bottom:10px;color:var(--teal)}.intro p{color:var(--muted);margin-bottom:0}.home-progress{border-left:1px solid var(--line);padding-left:28px;min-width:200px}.home-progress strong{display:block;font-size:2rem;letter-spacing:-.05em}.home-progress strong span{font-size:1rem;color:var(--muted);font-weight:450;letter-spacing:0}.home-progress>span{font-size:.78rem;color:var(--muted)}.level-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:26px}.level{background:var(--white);border:1.5px solid var(--line);padding:18px;display:flex;text-align:left;gap:13px;align-items:flex-start;border-radius:14px;position:relative}.level.active{background:var(--ink);color:white;border-color:var(--ink)}.level-number{font-size:.78rem;border:1px solid var(--line);border-radius:8px;padding:6px;line-height:1}.level.active .level-number{border-color:#54716f;color:var(--lime)}.level strong{display:block;font-size:1.1rem;letter-spacing:-.02em;margin-top:-3px;margin-bottom:3px}.level span span{display:block;font-size:.8rem;color:var(--muted)}.level small{display:block;font-size:.78rem;color:var(--muted);margin-top:7px}.level.active span span,.level.active small{color:#dae6e9}.radio-mark{width:20px;height:20px;margin-left:auto;border-radius:50%;border:1px solid #a6b9c0;flex-shrink:0}.active .radio-mark{background:var(--lime);border-color:var(--lime);color:var(--ink)}.radio-mark svg{width:18px;height:18px}.area-heading{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:12px;gap:16px}.area-heading h2{margin:0}.area-heading>span{font-size:.82rem;color:var(--muted)}.areas{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.area-card{min-height:180px;display:flex;text-align:left;background:white;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;padding:0;transition:transform .18s,border-color .18s,box-shadow .18s}.area-card:hover{transform:translateY(-3px);border-color:var(--teal);box-shadow:0 8px 20px #1738460d}.area-body{padding:19px 0 16px 19px;display:flex;flex-direction:column;flex:1;min-width:0;z-index:1}.area-meta{font-size:.64rem;letter-spacing:.14em;color:var(--teal);font-weight:750;margin-bottom:10px}.area-body>strong{font-size:1.05rem;line-height:1.2;letter-spacing:-.025em;max-width:200px;margin-bottom:8px}.area-desc{font-size:.8rem;line-height:1.4;color:var(--muted);max-width:200px;margin-bottom:12px}.area-bottom{margin-top:auto;font-size:.72rem;color:var(--muted);display:flex;gap:12px;flex-wrap:wrap}.start-label{color:var(--teal);font-weight:750}.area-image{width:28%;margin:16px 7px 16px 7px;display:flex;align-items:center;justify-content:center}.area-image svg{width:100%;max-height:138px}.home-foot{display:flex;gap:25px;margin-top:23px;border-top:1px solid var(--line);padding-top:15px;color:var(--muted)}.home-foot p{font-size:.8rem;margin-bottom:0;flex:1;line-height:1.5}.btn{border:1px solid transparent;border-radius:10px;font-weight:650;font-size:.9rem;min-height:42px;padding:10px 18px;display:inline-flex;align-items:center;justify-content:center;gap:8px;background:white;text-decoration:none}.btn.primary{background:var(--ink);color:white}.btn.primary:hover{background:#235465}.btn.secondary{border-color:var(--teal);color:var(--teal);background:white}.btn.quiet{background:transparent;color:var(--muted)}.btn.quiet:hover{background:#e4ecef;color:var(--ink)}.btn.small{font-size:.8rem;padding:7px 12px;min-height:36px}.workspace{max-width:1440px;margin:0 auto;padding:20px 24px 0;display:flex;flex-direction:column;min-height:calc(100dvh - 80px)}.work-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:16px}.work-top>div:first-child{display:flex;align-items:center;gap:18px}.work-top .eyebrow{margin:0}.level-switch select{border:1px solid var(--line);border-radius:8px;background:white;padding:8px 30px 8px 10px;color:var(--ink);font-size:.82rem;max-width:250px}.steps{display:flex;align-items:center;gap:14px}.steps>span{font-size:.8rem;color:var(--muted)}.steps nav{display:flex;gap:6px}.step{width:29px;height:29px;border-radius:50%;border:1px solid #b1c4cb;background:white;font-size:.72rem;display:grid;place-items:center;padding:0}.step.current{border:2px solid var(--teal);color:var(--teal);font-weight:750}.step.done{background:var(--lime);border-color:#aad26a;color:var(--ink)}.step.done svg{width:15px;height:15px}.work-grid{display:grid;grid-template-columns:minmax(290px,.88fr) minmax(0,1.2fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:white;flex:1}.visual-panel{background:#eaf0f3;padding:22px 24px;display:flex;flex-direction:column;min-width:0;border-right:1px solid var(--line)}.visual-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.visual-title .eyebrow{margin:0;color:var(--muted)}.icon-btn{display:grid;place-items:center;width:36px;height:36px;padding:0;border:1px solid #bdcdd4;background:transparent;border-radius:9px}.illustrations{flex:1;display:flex;align-items:center;justify-content:center;min-height:180px;max-height:440px}.illustration{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:0;width:100%;height:100%;gap:10px}.science-image{width:100%;height:auto;max-height:355px;overflow:hidden}.illustrations.pair{gap:14px}.pair .illustration{width:50%}.pair .science-image{max-height:305px}.image-label{font-size:.8rem;font-weight:650;text-align:center}.figure-note{font-size:.78rem;color:#4c636e;line-height:1.45;margin:14px 0}.fact-box{background:#ffffffbd;border:1px solid #d4e0e5;border-radius:12px;margin-top:auto;flex-shrink:0}.fact-box summary{cursor:pointer;padding:12px 14px;font-weight:700;font-size:.85rem;display:flex;gap:8px;align-items:center;list-style:none}.fact-box summary::after{content:'+';margin-left:auto;font-size:1.2rem;font-weight:400}.fact-box[open] summary::after{content:'−'}.fact-box>div{padding:0 14px 2px;font-size:.86rem}.fact-box p{margin-bottom:12px}.task-panel{padding:26px 32px;min-width:0}.task-type{font-size:.67rem;letter-spacing:.17em;color:var(--teal);font-weight:800;display:block;margin-bottom:10px}.task-panel h1{font-size:1.8rem;line-height:1.16;margin-bottom:12px}.prompt{font-size:1rem;line-height:1.5;margin-bottom:20px}.choices{display:grid;gap:10px}.answer-option{background:white;border:1.5px solid var(--line);border-radius:12px;padding:13px 15px;display:flex;align-items:center;gap:13px;text-align:left;line-height:1.4;font-size:1rem}.answer-option:hover,.order-item:hover{border-color:var(--teal)}.answer-option.selected{background:#eef8f6;border-color:var(--teal)}.option-marker{width:28px;height:28px;border:1px solid #bdcdd3;border-radius:50%;display:grid;place-items:center;flex-shrink:0;font-size:.8rem;font-weight:650}.option-marker.square{border-radius:6px}.selected .option-marker{background:var(--teal);border-color:var(--teal);color:white}.option-marker svg{width:18px;height:18px}.task-actions{display:flex;gap:8px;margin-top:20px;align-items:center;flex-wrap:wrap}.feedback{padding:15px 18px;border-radius:12px;margin-top:18px;font-size:.9rem;border-left:3px solid var(--teal);background:#e9f6f1}.feedback p{margin:5px 0 0}.feedback.retry{background:#fff5e0;border-color:#bf8930;color:#66470b}.feedback .micro{color:inherit}.hint{padding:15px;background:#edf4fc;border-radius:12px;font-size:.9rem;margin-top:12px}.hint p{margin:6px 0 0}.notice{padding:10px 14px;background:#fff2d8;color:#794500;font-size:.9rem;border-radius:8px;margin:12px 0 0}.micro{font-size:.8rem;color:var(--muted);line-height:1.5;margin:10px 0}.work-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:15px 0 18px}.match-list{display:grid;gap:10px}.match-row{border:1px solid var(--line);border-radius:12px;padding:12px;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:14px}.match-row>span{font-size:.9rem;line-height:1.4}.match-row select{width:100%;border:1px solid #acbfc7;padding:10px 8px;border-radius:8px;min-width:0;background:white;font-size:.86rem;color:var(--ink)}.ordered{list-style:none;padding:0;display:grid;gap:7px;min-height:48px;margin:8px 0 14px}.ordered li{display:flex;align-items:center;gap:10px;font-size:.88rem}.ordered li>span{width:24px;height:24px;border-radius:50%;background:var(--ink);color:white;display:grid;place-items:center;font-size:.7rem;flex-shrink:0}.ordered button{flex:1;text-align:left;border:1px solid #a9c9c2;background:#edf8f2;padding:10px 13px;border-radius:9px;display:flex;justify-content:space-between;gap:10px;line-height:1.4}.ordered button span{font-size:1.15rem;color:var(--muted)}.empty-order{border:1px dashed #b0c4ca;background:#f9fbfc;border-radius:10px;padding:13px;color:var(--muted)}.order-bank{display:flex;flex-direction:column;gap:7px}.order-item{border:1px solid var(--line);background:white;border-radius:9px;padding:10px 12px;text-align:left;display:flex;align-items:center;gap:10px;font-size:.88rem;line-height:1.4}.order-item svg{width:16px;height:16px;color:var(--teal)}.write-label{display:block;font-size:.86rem;font-weight:750;margin-bottom:8px}.starter{font-size:.85rem;color:var(--teal);margin-bottom:10px}.word-bank{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}.word-bank span{font-size:.75rem;padding:4px 9px;background:#eef3f5;border-radius:7px}textarea{display:block;width:100%;min-height:108px;padding:14px;border:1.5px solid #b8cbd2;border-radius:12px;resize:vertical;font-size:1rem;line-height:1.55;color:var(--ink);background:#fcfefe}textarea::placeholder{color:#74858d}.reflection{border-top:1px solid var(--line);padding-top:18px;margin-top:22px}.reflection h3{margin-bottom:6px}.model-answer{padding:15px 18px;background:#edf5f7;border-radius:12px;font-size:.92rem;line-height:1.6}.reflection h4{font-size:.88rem;margin:18px 0 10px}.criteria{display:grid;gap:9px}.criteria label{display:flex;gap:9px;align-items:flex-start;font-size:.86rem;line-height:1.5}.criteria input,.self-rating input{accent-color:var(--teal);width:17px;height:17px;flex-shrink:0;margin:3px 0 0}.self-rating{border:0;border-top:1px solid var(--line);padding:12px 0;margin:16px 0 0}.self-rating legend{font-size:.86rem;font-weight:700;padding:0 8px 0 0}.self-rating label{display:inline-flex;align-items:center;gap:7px;margin:5px 15px 8px 0;font-size:.82rem}.extension-note{font-size:.79rem;line-height:1.5;color:var(--muted);border-left:2px solid #a2bcc6;padding-left:10px}.hotspots{display:flex;gap:12px}.spot{width:62px;height:62px;border:1.5px solid #b0c5cb;background:white;border-radius:14px;font-size:1.25rem;font-weight:750}.spot.selected{background:var(--teal);color:white;border-color:var(--teal)}.summary{max-width:1000px;padding:38px 24px;margin:auto}.summary>p{color:var(--muted)}.summary-counts{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0}.summary-counts>div{padding:20px 24px;background:white;border:1px solid var(--line);border-radius:16px}.summary-counts strong{font-size:2rem;display:block;letter-spacing:-.04em}.summary-counts strong span{font-size:1rem;color:var(--muted);font-weight:450;letter-spacing:0}.summary-counts div>span{color:var(--muted);font-size:.86rem}.summary-list{background:white;border:1px solid var(--line);border-radius:16px;overflow:hidden}.summary-row{display:flex;align-items:center;gap:14px;background:white;border:0;border-bottom:1px solid var(--line);width:100%;padding:18px;text-align:left}.summary-row:last-child{border-bottom:0}.summary-row:hover{background:#f5fafb}.summary-number{width:30px;height:30px;border-radius:50%;background:#e9f0f3;display:grid;place-items:center;flex-shrink:0;font-size:.85rem}.summary-row>span:nth-child(2){flex:1}.summary-row strong{font-size:.95rem;display:block}.summary-row small{font-size:.76rem;color:var(--muted);display:block;margin-top:4px}.status{font-size:.75rem;max-width:180px;line-height:1.4;border-radius:7px;background:#eef1f4;padding:6px 9px;color:var(--muted)}.status.success{background:#e5f5e7;color:#276345}.status.retry{background:#fff1d7;color:#855304}.status.self{background:#e7f0ff;color:#255679}.review-link{font-size:.8rem;color:var(--teal)}.independent{background:var(--ink);color:white;border-radius:16px;padding:22px 26px;margin:22px 0}.independent h2{color:var(--lime);margin-bottom:8px}.independent p{font-size:.92rem;margin-bottom:0}.summary-actions{display:flex;justify-content:space-between;gap:12px;margin-top:22px}dialog{border:1px solid var(--line);border-radius:18px;padding:20px;width:min(92vw,900px);max-height:92dvh;color:var(--ink)}dialog::backdrop{background:#122e39b3}.dialog-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}#zoom-content .science-image{max-height:72dvh;width:100%}#zoom-content p{font-size:.86rem;color:var(--muted);margin:12px 0 0}
@media(min-width:1050px) and (min-height:690px){.workspace{height:calc(100dvh - 80px);min-height:0}.work-grid{min-height:0}.task-panel,.visual-panel{overflow-y:auto;scrollbar-width:thin;scrollbar-color:#b9cbd1 transparent}.visual-panel .illustrations{min-height:220px;flex-shrink:1}.science-image{max-height:34dvh}.pair .science-image{max-height:32dvh}.fact-box[open]{margin-top:0}.fact-box[open]~*{flex-shrink:0}}
@media(max-width:1100px){.session-note{display:none}.area-card{min-height:190px}.area-body{padding-left:15px}.area-image{width:23%}.area-desc{max-width:160px}.work-top>div:first-child{gap:10px}.work-top .eyebrow{max-width:230px;line-height:1.5}.task-panel{padding:22px}.visual-panel{padding:20px}.level{padding:15px;gap:10px}.level-number{display:none}}
@media(max-width:800px){.header{height:68px;padding:0 20px}.home{padding:24px 20px}.home-progress{display:none}.level-grid{gap:8px}.level{padding:13px 10px}.level strong{font-size:.9rem}.level small{display:none}.level span span{font-size:.72rem;line-height:1.4}.radio-mark{width:17px;height:17px}.radio-mark svg{width:15px;height:15px}.areas{grid-template-columns:repeat(2,1fr)}.area-image{width:30%}.area-card{min-height:170px}.area-heading>span{display:none}.home-foot{display:block}.home-foot p+p{margin-top:8px}.workspace{padding:16px 16px 0;min-height:calc(100dvh - 68px)}.work-top{align-items:flex-start}.work-top>div:first-child{display:block}.work-top .eyebrow{margin-bottom:7px}.steps{display:block;text-align:right}.steps nav{margin-top:8px}.work-grid{grid-template-columns:minmax(210px,.7fr) minmax(0,1fr)}.visual-panel{padding:15px}.task-panel{padding:20px}.task-panel h1{font-size:1.5rem}.illustrations.pair{flex-direction:column}.pair .illustration{width:100%}.science-image,.pair .science-image{max-height:260px}.illustrations{max-height:580px}.match-row{grid-template-columns:1fr;gap:8px}.fact-box>div{font-size:.8rem}.summary{padding-top:28px}.summary-row{flex-wrap:wrap}.summary-row>span:nth-child(2){flex-basis:55%}.status{margin-left:44px}.review-link{margin-left:auto}}
@media(max-width:560px){.brand{font-size:1.05rem}.brand-icon{width:38px;height:38px}.header-end .course-pill{font-size:.74rem;padding:6px 10px}.home{padding:24px 16px}.intro{margin-bottom:20px}.intro h1{font-size:2rem;max-width:320px}.intro .eyebrow{font-size:.64rem}.intro p{font-size:.9rem}.level-grid{grid-template-columns:1fr}.level{align-items:center;padding:12px 14px;gap:14px}.level-number{display:block}.level strong{font-size:1rem;margin:0}.level>span:nth-child(2){display:flex;flex-wrap:wrap;align-items:center;column-gap:10px;row-gap:3px}.level small{display:block;width:100%;font-size:.73rem;margin-top:1px}.level span span{font-size:.73rem}.radio-mark{width:20px;height:20px}.radio-mark svg{width:18px;height:18px}.areas{grid-template-columns:1fr}.area-card{min-height:150px}.area-image{width:23%;margin:15px}.area-image svg{max-height:110px}.area-body>strong{max-width:none;font-size:1.08rem}.area-desc{max-width:none}.area-bottom{gap:20px}.area-meta{margin-bottom:7px}.work-grid{grid-template-columns:1fr;overflow:visible}.visual-panel{border-right:0;border-bottom:1px solid var(--line);border-radius:20px 20px 0 0;padding:14px 18px}.visual-title{margin-bottom:4px}.illustrations{min-height:0;max-height:225px}.illustration{max-height:225px}.science-image{max-height:215px}.illustrations.pair{flex-direction:row}.pair .illustration{width:50%}.pair .science-image{max-height:175px}.figure-note{margin:8px 0;font-size:.73rem}.fact-box{margin-top:2px}.fact-box summary{padding:9px 12px}.task-panel{padding:22px 18px}.task-panel h1{font-size:1.6rem}.work-top .eyebrow{font-size:.65rem;max-width:220px}.work-top{gap:8px}.steps>span{font-size:.7rem}.step{width:24px;height:24px;font-size:.65rem}.steps nav{gap:4px}.level-switch select{font-size:.76rem;max-width:210px}.work-bottom{position:sticky;bottom:0;background:var(--paper);z-index:3;border-top:1px solid var(--line);padding:12px 0}.work-bottom .btn{font-size:.78rem;padding:9px 10px;min-height:42px}.work-bottom .btn:first-child{padding-left:0}.match-row{grid-template-columns:1fr 1fr}.answer-option{font-size:.94rem}.order-item,.ordered button{font-size:.84rem}.summary{padding:24px 16px}.summary h1{font-size:1.85rem}.summary-counts{gap:9px}.summary-counts>div{padding:15px}.summary-counts div>span{font-size:.76rem}.summary-row{padding:15px}.summary-row strong{font-size:.9rem}.summary-actions{flex-direction:column}.self-rating label{display:flex}.btn{font-size:.87rem}.status{max-width:220px}.home-foot{margin-top:20px}.course-pill{display:none}.header-end{gap:6px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{.header,.work-top,.visual-panel,.work-bottom,.task-actions,.summary-actions,.skip{display:none}.work-grid{display:block;border:none}.workspace{height:auto}.task-panel{overflow:visible}.summary{max-width:none}.summary-row{break-inside:avoid}.independent{background:white;color:black;border:1px solid #ccc}.independent h2{color:black}}

.summary-counts.one-column{grid-template-columns:1fr}