:root{--bg: #faf7f2;--bg2: #f3efe8;--bg3: #ece7dd;--text: #2c2418;--text2: #5a4d3c;--text3: #8a7d6b;--accent: #b44a2d;--accent2: #d4763e;--accent-light: #fdf0ea;--blue: #2d6b8a;--blue-light: #e8f3f8;--green: #3d7a4a;--green-light: #eaf5ec;--red: #c0392b;--red-light: #fdecea;--purple: #7b5ea7;--purple-light: #f0ecf7;--gold: #a68b3c;--gold-light: #faf5e6;--border: #d8d0c4;--shadow: rgba(44,36,24,.08);--serif: "Crimson Pro", Georgia, serif;--sans: "DM Sans", -apple-system, sans-serif;--mono: "JetBrains Mono", monospace}*{margin:0;padding:0;box-sizing:border-box}html{font-size:17px;scroll-behavior:smooth}body{font-family:var(--sans);color:var(--text);background:var(--bg);line-height:1.7}.book-menu-toggle{position:fixed;top:.75rem;right:.75rem;z-index:9999;background:#2c2418;color:#e8dfd3;border:none;width:40px;height:40px;border-radius:10px;cursor:pointer;font-size:1.1rem;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 12px #0003;transition:all .2s}.book-menu-toggle:hover{background:var(--accent);transform:scale(1.05)}.book-menu-overlay{display:none;position:fixed;inset:0;background:#2c241899;z-index:9998;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);justify-content:flex-end;align-items:flex-start;padding:4rem 1rem 1rem}.book-menu-overlay.open{display:flex}.book-menu-panel{background:#fff;border-radius:14px;width:min(22rem,90vw);box-shadow:0 20px 60px #00000040;animation:menuSlide .25s ease;overflow:hidden}@keyframes menuSlide{0%{opacity:0;transform:translateY(-10px) scale(.95)}to{opacity:1;transform:none}}.book-menu-header{padding:1rem 1.25rem;background:#2c2418;color:#f0e8da;font-family:var(--serif);font-size:1.1rem;font-weight:700}.book-menu-item{display:flex;align-items:center;gap:.75rem;padding:1rem 1.25rem;cursor:pointer;transition:all .15s;border-bottom:1px solid var(--border);text-decoration:none;color:var(--text)}.book-menu-item:hover{background:var(--bg2)}.book-menu-item.active{background:var(--accent-light);border-left:3px solid var(--accent)}.book-menu-item .bm-icon{font-size:1.5rem;width:2rem;text-align:center}.book-menu-item .bm-info{flex:1}.book-menu-item .bm-title{font-weight:700;font-size:.95rem}.book-menu-item .bm-desc{font-size:.78rem;color:var(--text3)}.cross-book-nav{display:flex;gap:.5rem;margin:2rem 0 0;padding-top:1.5rem;border-top:1px dashed var(--border);flex-wrap:wrap}.cross-book-btn{display:inline-flex;align-items:center;gap:.4rem;padding:.45rem .9rem;border:1px solid var(--border);border-radius:8px;font-size:.8rem;font-weight:600;color:var(--text2);text-decoration:none;cursor:pointer;background:var(--bg);font-family:var(--sans);transition:all .15s}.cross-book-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-light)}.cross-book-btn .cb-icon{font-size:.9rem}