:root{color-scheme:light dark;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5;font-weight:400;--bg: #f8f8f8;--fg: #1a1a1a;--secondary: #666;--border: #e0e0e0;--accent: #007aff;--accent-hover: #0066d6;--danger: #ff3b30;--badge-bg: rgba(0, 122, 255, .1);--footer-bg: rgba(255, 255, 255, .7)}@media (prefers-color-scheme: dark){:root{--bg: #1c1c1e;--fg: #f2f2f7;--secondary: #98989d;--border: #38383a;--accent: #0a84ff;--accent-hover: #409cff;--badge-bg: rgba(10, 132, 255, .15);--footer-bg: rgba(28, 28, 30, .8)}}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--bg);color:var(--fg)}button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}.library-page{display:flex;flex-direction:column;height:100%;max-width:640px;margin:0 auto}.page-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.page-header h1{font-size:1.25rem;font-weight:600}.icon-btn{width:36px;height:36px;border-radius:50%;background:var(--accent);color:#fff;font-size:1.5rem;line-height:1;display:flex;align-items:center;justify-content:center}.icon-btn:disabled{opacity:.5}.primary-btn{background:var(--accent);color:#fff;padding:10px 24px;border-radius:8px;font-weight:500}.primary-btn:hover{background:var(--accent-hover)}.primary-btn:disabled{opacity:.6}.text-btn{color:var(--accent);margin-top:12px;text-decoration:underline}.empty-state,.loading-state,.error-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:32px;text-align:center}.empty-icon{font-size:3.5rem;opacity:.4}.error-state p{color:var(--danger)}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.book-list{list-style:none;flex:1;overflow-y:auto}.book-item{display:flex;align-items:stretch;border-bottom:1px solid var(--border)}.book-item-main{flex:1;display:flex;align-items:center;padding:14px 20px;text-align:left;gap:12px}.book-item-info{flex:1;display:flex;flex-direction:column;gap:6px}.book-title{font-weight:600;font-size:1rem}.progress-bar{height:4px;background:var(--border);border-radius:2px;overflow:hidden}.progress-fill{height:100%;background:#34c759;border-radius:2px;transition:width .2s}.book-badge{font-size:.7rem;padding:2px 6px;background:var(--badge-bg);color:var(--accent);border-radius:4px;align-self:flex-start}.favorite-icon{color:var(--danger);font-size:1.1rem}.book-actions{display:flex;flex-direction:column;border-left:1px solid var(--border)}.action-btn{flex:1;padding:0 14px;font-size:.9rem;color:var(--secondary)}.action-btn:hover{background:var(--border)}.delete-btn:hover{color:var(--danger)}.reader-page{position:relative;height:100%;display:flex;flex-direction:column;overflow:hidden}.reader-loading,.gesture-prompt{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:32px;text-align:center}.page-content{flex:1;overflow:hidden}.page-text{font-family:Georgia,Times New Roman,serif;font-size:18px;line-height:26px;height:100%;overflow:hidden}.nav-btn{position:absolute;top:0;bottom:60px;width:25%;z-index:2;opacity:0}.nav-prev{left:0}.nav-next{right:0}.reader-footer{display:flex;align-items:center;justify-content:space-between;padding:12px 20px 20px;font-size:.75rem;color:var(--secondary)}.theme-badge{display:flex;align-items:center;gap:4px;padding:6px 10px;background:var(--footer-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:8px}.waveform-icon{flex-shrink:0}