:root{--ink:#243047;--muted:#687287;--paper:#fffdf8;--cream:#fff8ec;--line:#e8e1d6;--coral:#f47c68;--coral-dark:#c94f41;--sky:#64b7d6;--yellow:#f5c759;--mint:#74c7aa;--plum:#745a91;--shadow:0 18px 50px #392b1d1a}*{box-sizing:border-box}html{background:var(--cream);scroll-behavior:smooth;min-width:360px}body{background:radial-gradient(circle at 10% 8%, #f47c681a, transparent 24rem), radial-gradient(circle at 90% 30%, #64b7d617, transparent 26rem), var(--cream);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:PingFang HK,PingFang TC,Noto Sans TC,Microsoft JhengHei,system-ui,-apple-system,sans-serif}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline-offset:3px;outline:4px solid #64b7d673}a{color:var(--coral-dark)}.app-shell{min-height:100vh}.topbar{justify-content:space-between;align-items:center;gap:20px;width:min(1180px,100% - 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h2{font-size:1.05rem}.feedback-actions{flex-direction:column}.feedback-actions button{width:100%}.try-message{flex-direction:column;align-items:flex-start}.try-message button{width:100%}.summary-view{padding:26px 12px 60px}.summary-card{border-radius:28px;padding:36px 22px}.summary-actions{flex-direction:column}.summary-actions button{width:100%}.modal-backdrop{align-items:end;padding:0}.settings-panel,.sources-panel{border-radius:27px 27px 0 0;max-height:94vh;padding:24px 18px}.modal-heading h2{font-size:1.8rem}.settings-grid{margin-top:22px}.segmented button{padding-inline:12px}.toggle-list,.credits-list{grid-template-columns:1fr}.history-list li{grid-template-columns:62px 1fr}.history-list small{grid-column:2}.source-intro-grid{grid-template-columns:1fr}.modal-footer{flex-direction:column;align-items:stretch}.modal-footer button{width:100%}}@media 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