*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--font:"Outfit", -apple-system, BlinkMacSystemFont, sans-serif;--font-serif:"Playfair Display", serif;--bg:#fdfbf7;--bg-secondary:#f4f1e9;--bg-card:#fff;--bg-card-hover:#fcfaf5;--border:#e8e3d5;--border-active:#d6a284;--text:#4a4238;--text-secondary:#7a7266;--text-muted:#a69f95;--accent:#c87556;--accent-dim:#c8755614;--accent-hover:#b56448;--success:#829d77;--error:#d27a7a;--shadow-soft:0 12px 40px #4a42380a;--shadow-hover:0 20px 50px #c8755614}html,body{height:100%;font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}::selection{background:var(--accent-dim);color:var(--accent)}@keyframes 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32px;display:flex;position:sticky;top:0}.header-brand{align-items:center;gap:12px;display:flex}.header-logo{background:var(--accent);color:#fff;width:36px;height:36px;box-shadow:0 4px 12px var(--accent-dim);border-radius:12px;justify-content:center;align-items:center;display:flex}.header-title{font-family:var(--font-serif);color:var(--text);letter-spacing:-.01em;font-size:20px;font-weight:600}.header-badge{background:var(--bg-secondary);color:var(--text-secondary);letter-spacing:.05em;text-transform:uppercase;border-radius:20px;padding:4px 12px;font-size:11px;font-weight:500}.header-tagline{color:var(--text-muted);font-size:13px;font-weight:400}.main-content{z-index:1;flex-direction:column;flex:1;align-items:center;padding:30px 24px 20px;display:flex;position:relative}.content-wrapper{width:100%;max-width:600px}.hero{text-align:center;margin-bottom:24px}.hero-pill{background:var(--bg-card);color:var(--accent);border:1px solid var(--border);box-shadow:var(--shadow-soft);border-radius:30px;align-items:center;gap:8px;margin-bottom:16px;padding:4px 12px;font-size:11px;font-weight:500;display:inline-flex}.hero h1{font-family:var(--font-serif);color:var(--text);margin-bottom:8px;font-size:32px;font-weight:600;line-height:1.1}.hero h1 .accent{color:var(--accent);font-style:italic}.hero p{color:var(--text-secondary);max-width:460px;margin:0 auto;font-size:14px;line-height:1.5}.feature-pills{flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:40px;display:flex}.feature-pill{border:1px solid var(--border);color:var(--text-secondary);background:0 0;border-radius:30px;align-items:center;gap:8px;padding:8px 16px;font-size:13px;font-weight:400;display:flex}.feature-pill svg{color:var(--accent)}.glass-card{background:var(--bg-card);border:1px solid var(--border);box-shadow:var(--shadow-soft);border-radius:24px;padding:24px}.glass-card-label{font-family:var(--font-serif);color:var(--text);text-align:center;margin-bottom:16px;font-size:16px;font-weight:600}.drop-zone{border:2px dashed var(--border);text-align:center;cursor:pointer;background:var(--bg-secondary);border-radius:20px;flex-direction:column;justify-content:center;align-items:center;gap:8px;min-height:120px;padding:24px 16px;transition:all .3s;display:flex}.drop-zone:hover{border-color:var(--border-active);background:var(--bg-card-hover)}.drop-zone.active{border-color:var(--accent);background:var(--bg-card);box-shadow:var(--shadow-hover);transform:scale(1.02)}.drop-zone.has-file{border-color:var(--accent);background:var(--bg-card);border-style:solid}.drop-icon{background:var(--bg-card);width:44px;height:44px;color:var(--text-muted);border-radius:22px;justify-content:center;align-items:center;display:flex;box-shadow:0 4px 12px 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fadeInUp;display:flex}.status-msg.success{background:#f4f8f3;border:1px solid #dce7d8}.status-msg.error{background:#fdf4f4;border:1px solid #f3dada}.status-msg .icon{flex-shrink:0;margin-top:2px}.status-msg .title{color:var(--text);font-size:14px;font-weight:500}.status-msg .detail{color:var(--text-secondary);margin-top:4px;font-size:13px}.steps-grid{grid-template-columns:repeat(3,1fr);gap:16px;margin-top:40px;display:grid}.step-card{text-align:center;background:0 0;padding:24px 16px}.step-num{width:32px;height:32px;font-family:var(--font-serif);background:var(--bg-card);color:var(--accent);border:1px solid var(--border);border-radius:16px;justify-content:center;align-items:center;margin:0 auto 12px;font-size:16px;font-style:italic;display:flex;box-shadow:0 4px 12px #00000005}.step-title{color:var(--text);margin-bottom:6px;font-size:14px;font-weight:500}.step-desc{color:var(--text-secondary);font-size:13px;line-height:1.4}.chat-container{background:var(--bg-card);border:1px solid var(--border);height:calc(100vh - 200px);min-height:500px;box-shadow:var(--shadow-soft);border-radius:32px;flex-direction:column;display:flex;overflow:hidden}.chat-header{border-bottom:1px solid var(--border);background:var(--bg-card);align-items:center;gap:16px;padding:20px 24px;display:flex}.chat-header-icon{background:var(--accent-dim);width:40px;height:40px;color:var(--accent);border-radius:20px;justify-content:center;align-items:center;display:flex}.chat-header-title{font-family:var(--font-serif);color:var(--text);font-size:18px;font-weight:600}.chat-header-sub{color:var(--text-secondary);font-size:13px}.chat-messages{background:var(--bg-secondary);flex-direction:column;flex:1;gap:24px;padding:32px 24px;display:flex;overflow-y:auto}.msg-row{gap:12px;animation:.4s cubic-bezier(.2,.8,.2,1) fadeInUp;display:flex}.msg-row.user{flex-direction:row-reverse}.msg-avatar{border-radius:18px;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:14px;display:flex;box-shadow:0 4px 12px #00000008}.msg-avatar.user{background:var(--text);color:#fff}.msg-avatar.assistant{background:var(--bg-card);color:var(--accent);border:1px solid var(--border)}.msg-body{max-width:80%}.msg-bubble{border:1px solid var(--border);padding:16px 20px;font-size:15px;line-height:1.6}.msg-bubble.user{background:var(--bg-card);color:var(--text);border-radius:24px 24px 4px}.msg-bubble.assistant{background:var(--bg-card);color:var(--text);border-radius:24px 24px 24px 4px}.msg-time{color:var(--text-muted);margin-top:8px;padding:0 8px;font-size:11px}.msg-row.user .msg-time{text-align:right}.sources-toggle{color:var(--accent);cursor:pointer;font-size:12px;font-family:var(--font);background:0 0;border:none;align-items:center;gap:6px;margin-top:4px;padding:8px;font-weight:500;display:flex}.source-chip{background:var(--bg-secondary);border:1px solid var(--border);color:var(--text-secondary);border-radius:16px;margin-top:8px;padding:12px 16px;font-size:13px;line-height:1.5}.source-chip .num{color:var(--accent);margin-right:6px;font-weight:600}.typing-indicator{align-items:center;gap:6px;padding:8px 4px;display:flex}.typing-dot{background:var(--text-muted);border-radius:4px;width:8px;height:8px;animation:1.4s ease-in-out infinite float}.typing-dot:nth-child(2){animation-delay:.15s}.typing-dot:nth-child(3){animation-delay:.3s}.chat-input-area{background:var(--bg-card);border-top:1px solid var(--border);padding:20px 24px}.chat-input-row{background:var(--bg-secondary);border:1px solid var(--border);border-radius:24px;align-items:flex-end;gap:12px;padding:8px 16px;transition:all .3s;display:flex}.chat-input-row:focus-within{border-color:var(--border-active);background:var(--bg-card);box-shadow:0 4px 16px #00000005}.chat-input{color:var(--text);font-size:15px;font-family:var(--font);resize:none;max-height:150px;caret-color:var(--accent);background:0 0;border:none;outline:none;flex:1;padding:8px 0;line-height:1.5}.chat-input::placeholder{color:var(--text-muted)}.send-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:20px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;transition:all .3s;display:flex}.send-btn:hover{background:var(--accent-hover);transform:translateY(-1px)}.send-btn:disabled{opacity:.5;cursor:not-allowed;background:var(--text-muted);transform:none}.chat-hint{color:var(--text-muted);text-align:center;margin-top:12px;font-size:12px}.footer{text-align:center;color:var(--text-muted);z-index:1;padding:24px;font-size:13px;position:relative}@media (max-width:640px){.hero h1{font-size:36px}.steps-grid{grid-template-columns:1fr;gap:0}.header-tagline{display:none}.glass-card{border-radius:24px;padding:24px}}