*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-card: #1a1a28;--bg-card-hover: #22223a;--bg-input: #16162a;--text-primary: #e8e6e3;--text-secondary: #9994a8;--text-muted: #6b6580;--accent: #c9a55c;--accent-dim: #a8884a;--accent-glow: rgba(201, 165, 92, .15);--accent-blue: #6888c8;--border: #2a2a40;--border-light: #3a3a55;--danger: #d4574e;--success: #5db87a;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--shadow-card: 0 4px 24px rgba(0,0,0,.3);--shadow-float: 0 12px 48px rgba(0,0,0,.5);--font-sans: "Inter", -apple-system, sans-serif;--font-serif: "Noto Serif SC", "Georgia", serif;--transition: all .25s cubic-bezier(.4, 0, .2, 1)}html{font-size:16px}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}.app{min-height:100vh;display:flex;flex-direction:column}.header{padding:20px 32px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);background:#0a0a0fd9;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);position:sticky;top:0;z-index:100}.logo{display:flex;align-items:center;gap:12px;cursor:pointer}.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--accent),var(--accent-dim));border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:18px}.logo-text{font-family:var(--font-serif);font-size:1.25rem;font-weight:700;color:var(--text-primary);letter-spacing:.03em}.logo-sub{font-size:.75rem;color:var(--text-muted);font-weight:400;margin-left:8px}.header-tagline{font-size:.8rem;color:var(--text-muted);font-style:italic;max-width:360px;text-align:right}.main{flex:1;padding:40px 32px;max-width:1200px;margin:0 auto;width:100%}.library-hero{text-align:center;padding:48px 0 40px}.library-hero h1{font-family:var(--font-serif);font-size:2.2rem;font-weight:700;margin-bottom:12px;background:linear-gradient(to right,var(--text-primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.library-hero p{color:var(--text-secondary);font-size:1rem;max-width:500px;margin:0 auto}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;margin-top:32px}.book-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:0;cursor:pointer;transition:var(--transition);overflow:hidden;position:relative}.book-card:hover{border-color:var(--accent-dim);background:var(--bg-card-hover);transform:translateY(-4px);box-shadow:var(--shadow-card),0 0 32px var(--accent-glow)}.book-card-cover{width:100%;height:200px;object-fit:cover;display:block;opacity:.9}.book-card-body{padding:20px}.book-card-title{font-family:var(--font-serif);font-size:1.15rem;font-weight:600;margin-bottom:4px;line-height:1.3}.book-card-author{color:var(--accent);font-size:.85rem;font-weight:500;margin-bottom:10px}.book-card-domain{display:inline-block;font-size:.7rem;color:var(--text-secondary);background:#c9a55c1a;border:1px solid rgba(201,165,92,.2);padding:3px 10px;border-radius:20px;text-transform:uppercase;letter-spacing:.05em}.book-card-disclaimer{font-size:.72rem;color:var(--text-muted);margin-top:12px;padding-top:10px;border-top:1px solid var(--border);line-height:1.5}.chat-view{display:flex;flex-direction:column;height:calc(100vh - 80px);max-width:800px;margin:0 auto}.chat-header{display:flex;align-items:center;gap:16px;padding:20px 0;border-bottom:1px solid var(--border);margin-bottom:16px}.chat-header-cover{width:48px;height:64px;border-radius:6px;object-fit:cover}.chat-header-info h2{font-family:var(--font-serif);font-size:1.2rem;font-weight:600}.chat-header-info p{color:var(--text-secondary);font-size:.8rem}.chat-back-btn{background:none;border:1px solid var(--border);color:var(--text-secondary);padding:6px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:.8rem;transition:var(--transition);margin-left:auto}.chat-back-btn:hover{border-color:var(--accent-dim);color:var(--text-primary)}.chat-messages{flex:1;overflow-y:auto;padding:16px 0;display:flex;flex-direction:column;gap:16px;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:transparent}.chat-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.msg{max-width:85%;padding:14px 18px;border-radius:var(--radius-md);font-size:.92rem;line-height:1.7;animation:msgIn .3s ease}@keyframes msgIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.msg-user{align-self:flex-end;background:linear-gradient(135deg,#2a2a58,#1e1e48);border:1px solid #3a3a68;color:var(--text-primary)}.msg-assistant{align-self:flex-start;background:var(--bg-card);border:1px solid var(--border);color:var(--text-primary)}.msg-assistant h1,.msg-assistant h2,.msg-assistant h3{font-family:var(--font-serif);color:var(--accent);margin:12px 0 6px}.msg-assistant h3{font-size:1rem}.msg-assistant ul,.msg-assistant ol{padding-left:20px}.msg-assistant li{margin:4px 0}.msg-assistant code{background:#c9a55c1a;padding:2px 6px;border-radius:4px;font-size:.85rem}.msg-assistant blockquote{border-left:3px solid var(--accent-dim);padding-left:12px;color:var(--text-secondary);font-style:italic;margin:8px 0}.msg-assistant strong{color:var(--accent)}.msg-assistant p{margin:6px 0}.typing-cursor{display:inline;color:var(--accent);animation:blink .8s ease infinite;font-weight:300}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.msg-system{align-self:center;background:transparent;color:var(--text-muted);font-size:.78rem;font-style:italic;max-width:100%;text-align:center}.msg-loading{display:flex;align-items:center;gap:8px;padding:14px 18px}.dot-pulse{display:flex;gap:4px}.dot-pulse span{width:6px;height:6px;background:var(--accent);border-radius:50%;animation:pulse 1.2s ease-in-out infinite}.dot-pulse span:nth-child(2){animation-delay:.2s}.dot-pulse span:nth-child(3){animation-delay:.4s}@keyframes pulse{0%,to{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1.2)}}.chat-input-area{padding:16px 0;border-top:1px solid var(--border)}.chat-input-row{display:flex;gap:10px;align-items:flex-end}.chat-input{flex:1;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);padding:14px 18px;font-size:.92rem;font-family:var(--font-sans);resize:none;min-height:48px;max-height:120px;transition:var(--transition);outline:none}.chat-input:focus{border-color:var(--accent-dim);box-shadow:0 0 0 3px var(--accent-glow)}.chat-input::placeholder{color:var(--text-muted)}.chat-send-btn{background:linear-gradient(135deg,var(--accent),var(--accent-dim));border:none;color:var(--bg-primary);padding:12px 20px;border-radius:var(--radius-md);cursor:pointer;font-size:.9rem;font-weight:600;min-width:80px;transition:var(--transition)}.chat-send-btn:hover{transform:scale(1.03);box-shadow:0 4px 16px var(--accent-glow)}.chat-send-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.chat-guardrail-note{font-size:.72rem;color:var(--text-muted);text-align:center;margin-top:8px}.loading-page{display:flex;align-items:center;justify-content:center;min-height:60vh;color:var(--text-secondary);gap:12px;font-size:.95rem}.spinner{width:24px;height:24px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-banner{background:#d4574e1a;border:1px solid rgba(212,87,78,.3);color:var(--danger);padding:12px 16px;border-radius:var(--radius-sm);font-size:.85rem;margin:16px 0}@media(max-width:768px){.header{padding:12px 16px}.header-tagline{display:none}.main{padding:20px 16px}.library-hero h1{font-size:1.6rem}.book-grid{grid-template-columns:1fr}.msg{max-width:95%}.chat-view{height:calc(100vh - 60px)}}