:root{--bg:#fdf6ec;--paper:#fff;--ink:#2b1b14;--muted:#7a6a5e;--accent:#b4541a;--accent-soft:#f3d9b9;--border:#e6d8c6}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:ui-serif,Georgia,Iowan Old Style,Apple Garamond,Times New Roman,serif;font-size:16px;line-height:1.55}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:920px;margin:0 auto;padding:24px 20px 80px}.header{display:flex;justify-content:space-between;align-items:center;padding:16px 0 24px;border-bottom:1px solid var(--border);margin-bottom:28px}.brand{font-size:28px;font-weight:700;letter-spacing:-.02em;color:var(--ink)}.brand span{color:var(--accent)}.userbox{display:flex;align-items:center;gap:12px;font-size:14px}.avatar{width:32px;height:32px;border-radius:50%;border:1px solid var(--border);object-fit:cover}.btn{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:10px 16px;font-size:14px;font-weight:600;cursor:pointer;font-family:inherit}.btn:hover{filter:brightness(1.05)}.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--border)}.btn:disabled{opacity:.5;cursor:not-allowed}.hero{background:var(--accent-soft);border:1px solid var(--border);border-radius:12px;padding:28px;margin-bottom:28px;text-align:center}.hero h1{margin:0 0 8px;font-size:32px}.hero p{margin:0;color:var(--muted)}.card{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:20px}.form-row{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}.form-row label{font-size:13px;font-weight:600;color:var(--muted)}.form-row input,.form-row select,.form-row textarea{border:1px solid var(--border);border-radius:6px;padding:9px 11px;font-size:15px;font-family:inherit;background:var(--paper)}.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:20px;gap:20px}.book-tile{background:var(--paper);border:1px solid var(--border);border-radius:10px;overflow:hidden;display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s}.book-tile:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.08);text-decoration:none}.book-cover{aspect-ratio:2/3;background:#d8c3a5;display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;background-size:cover;background-position:50%}.book-meta{padding:12px 14px}.book-title{font-weight:700;font-size:16px;line-height:1.3;color:var(--ink);margin:0 0 2px}.book-author{font-size:13px;color:var(--muted);margin:0 0 8px}.book-reader{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}.book-reader img{width:18px;height:18px;border-radius:50%}.book-detail{display:grid;grid-template-columns:240px 1fr;grid-gap:28px;gap:28px}@media (max-width:700px){.book-detail{grid-template-columns:1fr}}.detail-cover{aspect-ratio:2/3;background-size:cover;background-position:50%;background-color:#d8c3a5;border-radius:8px;border:1px solid var(--border)}.detail-info h1{margin:0 0 4px;font-size:28px}.detail-info .author{color:var(--muted);margin-bottom:12px;font-size:16px}.status-pill{display:inline-block;background:var(--accent-soft);color:var(--accent);padding:3px 10px;border-radius:999px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em}.reader-row{display:flex;align-items:center;gap:8px;margin:16px 0;font-size:14px}.reader-row img{width:28px;height:28px;border-radius:50%}.chat,.reader-row img{border:1px solid var(--border)}.chat{margin-top:24px;border-radius:10px;background:var(--paper);display:flex;flex-direction:column;height:480px;max-height:60vh}.chat-header{padding:12px 16px;border-bottom:1px solid var(--border);font-weight:700;display:flex;justify-content:space-between;align-items:center}.presence-dot{width:8px;height:8px;border-radius:50%;background:#2dbe60;display:inline-block;margin-right:6px}.chat-messages{flex:1 1;overflow-y:auto;padding:14px 16px;flex-direction:column}.chat-messages,.msg{display:flex;gap:10px}.msg{align-items:flex-start}.msg img.av{width:28px;height:28px;border-radius:50%;flex-shrink:0}.msg .body{background:var(--bg);border-radius:8px;padding:6px 12px;max-width:80%}.msg .who{font-size:12px;font-weight:700;color:var(--accent);margin-bottom:2px}.msg .text{font-size:15px;word-wrap:break-word}.msg.system{font-size:12px;color:var(--muted);font-style:italic;justify-content:center}.chat-input{border-top:1px solid var(--border);padding:12px;display:flex;gap:8px}.chat-input input{flex:1 1;border:1px solid var(--border);border-radius:6px;padding:9px 12px;font-size:15px;font-family:inherit}.chat-input input:focus{outline:2px solid var(--accent);outline-offset:-1px}.empty{text-align:center;color:var(--muted);padding:40px 20px}.error{background:#ffe9e2;border:1px solid #f3a890;color:#820;padding:10px 14px;border-radius:6px;margin-bottom:12px;font-size:14px}.cover-preview{width:100px;aspect-ratio:2/3;border-radius:4px;background-size:cover;background-position:50%;border:1px solid var(--border);margin-top:8px}