:root{font-family:system-ui,-apple-system,"Noto Sans TC","Microsoft JhengHei",sans-serif;color:#17384c;background:#f2f6f8;--teal:#137d76;--muted:#688391;--edge:#dce7ed}*{box-sizing:border-box}body{margin:0}.topbar{background:#15364a;color:#eaf2f5;padding:14px max(18px,calc((100vw - 1150px)/2));display:flex;justify-content:space-between;gap:12px;font-size:13px}.topbar a{color:white;text-decoration:none}.shell{max-width:1150px;margin:auto;padding:28px 16px 55px}.hero{padding:4px 4px 17px}.eyebrow{letter-spacing:.14em;color:var(--teal);font-size:11px;font-weight:800;margin:0 0 8px}h1{font-size:clamp(43px,6vw,68px);letter-spacing:-.055em;margin:0;line-height:1.15}h1 em{color:#13958a;font-style:normal}.heroline{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}.hero h2{margin:0;font-size:18px}.pill,.chip{border-radius:100px;padding:6px 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9px;color:#fff;background:#1b3d51da;border-radius:6px}.type-switch{display:flex;flex-wrap:wrap;gap:7px}.type-switch button{font-size:12px;border:1px solid #d9e7e8;background:#f0f6f7;padding:9px 11px;border-radius:8px}.type-switch button.active{background:#d5f0ec;border-color:#54ada4;color:#086f69}.morph-info h4{font-size:20px;margin:19px 0 7px}.morph-info p{font-size:14px;line-height:1.8}.tip,.caption{color:#677f8e;font-size:12px;line-height:1.7}.setup{padding:14px 0}.setup label,.field,.input-label{display:block;font-size:13px;font-weight:700}select,input[type=file]{display:block;padding:11px;width:100%;max-width:360px;border:1px solid #cadce3;border-radius:9px;background:white;margin:8px 0}.actions{display:flex;flex-wrap:wrap;gap:9px;margin:15px 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/* Experimental AI comparison: distinct from expert label and student response. */
.ai-setup,.ai-summary{background:#f6fafb;border:1px solid #dce9ec;border-radius:12px;padding:15px;margin:16px 0}
.ai-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}
.ai-heading strong{font-size:14px}
.ai-buttons{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0}
.ai-status{background:#e9f3f5;border-radius:8px;color:#365e6c;padding:10px;font-size:12px;line-height:1.7}
.ai-compare{border:1px solid #c4dce9;background:#f2f8fc;border-radius:11px;margin:15px 0;padding:14px}
.ai-predictions{margin-top:10px}
.ai-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;border-bottom:1px solid #d8e7ec;padding:8px 0;font-size:12px}
.ai-row strong{font-size:13px}
.ai-votes{font-size:12px;line-height:1.7;color:#4e6978;margin:12px 0 0}
.ai-stats{color:#426071;font-size:13px;line-height:1.75}
@media(max-width:520px){.ai-buttons button{width:100%}.ai-row strong{text-align:right}}