:root{--bg: #f3f4f6;--surface: #ffffff;--surface-sunken: #f9fafb;--text: #111827;--text-muted: #6b7280;--border: #e5e7eb;--accent: #4f46e5;--accent-text: #ffffff;--danger: #b3261e;--notice: #92400e;--radius: 14px;--tap: 44px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color-scheme:light}:root[data-theme=dark]{--bg: #0b0f19;--surface: #111827;--surface-sunken: #1f2937;--text: #f3f4f6;--text-muted: #9ca3af;--border: #374151;--accent: #818cf8;--accent-text: #0b0f19;--danger: #fca5a5;--notice: #fcd34d;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);overscroll-behavior-y:none}.app{display:flex;flex-direction:column;min-height:100dvh;max-width:30rem;margin:0 auto;background:var(--surface)}@media(min-width:40rem){.app{min-height:100dvh;box-shadow:0 0 2rem #0000001f}}.app-bar{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:max(.75rem,env(safe-area-inset-top)) 1rem .75rem;background:var(--surface);border-bottom:1px solid var(--border)}.app-bar h1{margin:0;font-size:1.15rem;font-weight:650}.app-content{flex:1;padding:1rem 1rem 1.5rem}.app-content h2{margin:1.75rem 0 .75rem;font-size:1rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}.app-content>:first-child{margin-top:0}.tab-bar{position:sticky;bottom:0;z-index:2;display:flex;background:var(--surface);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom)}.tab-bar a{flex:1;min-height:var(--tap);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.15rem;padding:.5rem .25rem;font-size:.8rem;text-decoration:none;color:var(--text-muted)}.tab-bar a[aria-current=page]{color:var(--accent);font-weight:600}.tab-bar .tab-icon{font-size:1.25rem;line-height:1}button,.button-link{min-height:var(--tap);padding:0 1.1rem;border:1px solid transparent;border-radius:var(--radius);background:var(--accent);color:var(--accent-text);font:inherit;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;text-decoration:none}button:disabled{opacity:.5;cursor:not-allowed}button.secondary,.button-link{background:var(--surface-sunken);color:var(--text);border-color:var(--border)}.theme-toggle{min-height:2.25rem;width:2.25rem;padding:0;border-radius:50%;background:var(--surface-sunken);color:var(--text);border-color:var(--border);font-size:1.1rem}label{display:block;margin-bottom:.25rem;font-size:.9rem;color:var(--text-muted)}input,select,textarea{width:100%;min-height:var(--tap);padding:0 .75rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface-sunken);color:var(--text);font:inherit}input[type=file]{padding:.6rem .75rem}form>*+*{margin-top:.75rem}form button[type=submit]{width:100%}.random-picker>button{width:100%}.random-picker>*+*{margin-top:1rem}.export-links{display:flex;gap:.5rem;margin:0}.export-links .button-link{flex:1}.book-card{display:flex;gap:.9rem;align-items:flex-start;border:1px solid var(--border);border-radius:var(--radius);padding:.9rem;background:var(--surface)}.book-card img{width:64px;height:auto;object-fit:cover;border-radius:8px;flex-shrink:0}.book-card-body{min-width:0;flex:1}.book-card h3{margin:0 0 .2rem;font-size:1rem}.book-card p{margin:.2rem 0;font-size:.9rem;color:var(--text-muted)}.book-card p:last-of-type{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.book-card button{min-height:2rem;margin-top:.6rem;padding:0 .75rem;font-size:.85rem;background:var(--surface-sunken);color:var(--danger);border-color:var(--border)}.book-grid{display:grid;grid-template-columns:1fr;gap:.75rem}.error{color:var(--danger)}.notice{color:var(--notice)}progress{width:100%;height:.5rem;border-radius:999px}.fab{position:fixed;right:max(1rem,calc((100vw - 30rem)/2 + 1rem));bottom:calc(env(safe-area-inset-bottom) + 4.75rem);z-index:3;width:3.5rem;height:3.5rem;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--accent);color:var(--accent-text);font-size:2rem;line-height:1;text-decoration:none;box-shadow:0 4px 12px #00000040}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.library-toolbar{display:flex;flex-direction:column;gap:.5rem;margin-bottom:.75rem}.library-toolbar input[type=search]{width:100%;min-height:var(--tap);padding:0 .75rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface-sunken);color:var(--text);font-size:1rem}.library-sort{display:flex;gap:.5rem}.library-sort select{flex:1;min-height:var(--tap);padding:0 .5rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface-sunken);color:var(--text);font-size:1rem}.library-sort button{width:var(--tap);padding:0}.result-count{margin:0 0 .5rem;color:var(--text-muted);font-size:.875rem}.list-sentinel{height:1px}