.homework-sheet{box-sizing:border-box;width:min(440px,calc(100% - 24px));max-height:85vh;overflow:auto;margin:auto;border:2px solid #c9a24b;border-radius:18px;padding:20px;background:#fff8e8;color:#3a3020;font-family:inherit;box-shadow:0 8px 35px #0008}
.homework-sheet::backdrop{background:#080610a8}
.homework-sheet h2{font-size:18px;color:#785420;margin:0 0 14px}
.hw-question{font-size:17px;line-height:1.7;margin:0 0 12px}
.hw-options{padding-left:28px;margin:12px 0}
.hw-options li{padding:9px 10px;margin:8px 0;border:1px solid #cbbf9e;border-radius:10px;font-size:16px;line-height:1.5;overflow-wrap:anywhere}
.hw-options .hw-correct{background:#e0f0d4;border:2px solid #448140;color:#234c20;font-weight:bold}
.hw-explanation{font-size:16px;line-height:1.8;min-height:3em;padding:12px;background:#f1e6cb;border-radius:10px}
.hw-controls{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hw-controls button{min-height:44px;padding:8px 14px;font-size:14px}
.hw-controls button:disabled{opacity:.5;cursor:default}
.hw-controls button:focus-visible{outline:3px solid #568247;outline-offset:3px}