:root{--bg:#f3f5f6;--paper:#fff;--ink:#252a30;--muted:#626b75;--line:#dfe3e6;--accent:#d93032;--red:#ff9390;--orange:#ffbd78;--yellow:#ffe779;--green:#a8dfa0;--cyan:#94dfeb;--purple:#cdb3ef;--pink:#f6acd2;--sheet:#e8231a}.storage-details{margin:8px 0 16px}.storage-details .hint{margin:4px 0}#storageWarning{color:var(--accent)}.lecture-active #updateNotice{display:none}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font-family:Hiragino Sans,Noto Sans JP,system-ui,sans-serif}button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--line);background:var(--paper);border-radius:8px;min-width:44px;min-height:44px;padding:8px 12px}button:hover{border-color:var(--muted)}button:disabled{opacity:.4;cursor:default}button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid 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