.textbook-panel{background:#fafbf5;border:1px solid #dce3d3;border-radius:8px;margin:20px 0;padding:22px}.textbook-panel h3{color:#3e5635;white-space:pre-line;font-size:19px}.textbook-panel p{color:#68785c;white-space:pre-line;margin:12px 0;font-size:13px;line-height:1.9}.textbook-reader{border-top:1px solid #dce3d3;margin-top:22px;padding-top:18px}.textbook-toolbar{flex-wrap:wrap;justify-content:space-between;align-items:end;gap:12px;display:flex}.textbook-toolbar label{gap:8px;max-width:100%;font-size:12px;display:grid}.textbook-toolbar select{color:#3e5635;background:#fff;border:1px solid #dce3d3;border-radius:4px;width:min(450px,100%);padding:10px}.textbook-reader article{max-width:860px;margin:26px auto}.textbook-reader article h3{font-size:26px;line-height:1.5}.textbook-reader article h4{color:#3e5635;margin-top:24px;font-size:17px}.textbook-reader aside,.textbook-reader pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#edf1e6;border-radius:6px;margin:18px 0;padding:18px;font-size:13px;line-height:1.9}.textbook-table{margin:18px 0;overflow-x:auto}.textbook-table table{border-collapse:collapse;width:100%;font-size:13px}.textbook-table th,.textbook-table td{text-align:left;white-space:pre-line;border:1px solid #dce3d3;padding:12px;line-height:1.8}.textbook-table th{background:#edf1e6}.textbook-reader nav{justify-content:space-between;align-items:center;gap:15px;font-size:12px;display:flex}@media (max-width:640px){.textbook-panel{padding:16px}.textbook-toolbar{align-items:stretch}.textbook-reader article h3{font-size:21px}}