.private-textbook{--textbook-blue:#0757a6;min-width:0;color:#18212f;background:#fff;padding:clamp(12px,3vw,28px);border:1px solid #dce3ea;border-radius:16px}
.private-textbook *{box-sizing:border-box}.private-textbook h2{font-size:clamp(22px,4vw,30px);margin:0 0 12px}.textbook-lead{font-size:17px;line-height:1.7;max-width:70ch}.textbook-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:16px 0;border-bottom:1px solid #dce3ea}.textbook-controls label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:700;min-width:0}.textbook-controls select,.private-textbook button{min-height:44px;font:inherit;border:1px solid #9aa9ba;border-radius:8px;padding:8px 10px;background:#fff;color:#18212f;max-width:100%}.private-textbook :focus-visible{outline:3px solid #0757a6;outline-offset:3px}.textbook-status{min-height:26px;font-weight:700;color:#0757a6;line-height:1.6}.textbook-help{font-size:14px;line-height:1.6;color:#48566a}.textbook-pages{display:grid;gap:20px;min-width:0}.textbook-region{min-width:0;scroll-margin-top:16px;border:1px solid #dce3ea;border-radius:10px;overflow:hidden;background:#fff}.textbook-region h3{font-size:14px;font-weight:600;margin:0;padding:12px;background:#f0f5fb;color:#24364d}.textbook-pan{overflow:auto;max-width:100%;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.textbook-crop{position:relative;overflow:hidden;margin:0 auto;background:white;max-width:none;min-width:0}.textbook-crop img{position:absolute;max-width:none!important;height:auto!important;display:block;user-select:none}.textbook-pagination{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;margin-top:20px}.private-textbook button:disabled{opacity:.45}.private-textbook a{color:#0757a6;text-decoration:underline}
@media(max-width:600px){.textbook-controls{grid-template-columns:repeat(2,minmax(0,1fr))}.private-textbook{padding:12px;border-radius:10px}.textbook-pagination button{flex:1 1 100px}.textbook-region h3{padding:10px}.textbook-lead{font-size:16px}}
@media(prefers-color-scheme:dark){.private-textbook{background:#18212f;color:#f2f5fa;border-color:#536276}.textbook-controls{border-color:#536276}.textbook-help{color:#d2dae6}.textbook-status,.private-textbook a{color:#93c5fd}.textbook-controls select,.private-textbook button{background:#243247;color:#f2f5fa;border-color:#8998ac}.private-textbook :focus-visible{outline-color:#93c5fd}.textbook-region{border-color:#536276}.textbook-region h3{background:#243247;color:#f2f5fa}}