:root{--primary: #832A22;--primary-glow: rgba(131, 42, 34, .4);--bg-dark: #ffffff;--bg-darker: rgba(255, 255, 255, .95);--text-primary: #333333;--text-secondary: #666666;--border: rgba(0, 0, 0, .1);--accent-gradient: linear-gradient(135deg, #832A22 0%, #a6352b 100%)}@keyframes slideUpFade{0%{transform:translateY(10px);opacity:0}to{transform:translateY(0);opacity:1}}.chat-widget-container{font-family:Inter,system-ui,sans-serif;color:var(--text-primary);position:fixed;bottom:20px;right:20px;z-index:100000}.chat-widget-container *{box-sizing:border-box}.chat-fab{width:60px;height:60px;border-radius:50%;background:transparent;border:none;padding:0;cursor:pointer;box-shadow:0 4px 20px #0000004d;display:flex;align-items:center;justify-content:center;transition:transform .3s ease;overflow:hidden}.chat-fab.open{background:var(--accent-gradient)}.chat-fab:hover{transform:scale(1.05)}.fab-logo-img{width:100%;height:100%;border-radius:50%;object-fit:cover}.chat-fab svg{width:30px;height:30px;fill:#fff}.chat-overlay{position:fixed;bottom:90px;right:20px;width:400px;height:600px;max-height:calc(100vh - 120px);background:var(--bg-darker);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border);border-radius:16px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 10px 40px #00000026;transition:opacity .3s ease,transform .3s ease}.chat-overlay.closed{opacity:0;pointer-events:none;transform:translateY(20px)}.app-container{display:flex;flex-direction:column;height:100%;width:100%}.header{height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:var(--bg-dark);border-bottom:1px solid var(--border)}.logo-container{display:flex;align-items:center;gap:10px}.logo-wrapper{width:32px;height:32px}.header-logo-img{width:100%;height:100%;border-radius:4px}.logo-text{font-weight:700;font-size:.9rem;letter-spacing:.5px}.header-actions{display:flex;gap:10px}.maximize-btn,.close-btn-mobile{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;font-size:1.2rem;padding:5px}.maximize-btn svg{width:20px;height:20px;fill:currentColor}.mobile-tabs{display:flex;background:var(--bg-dark);border-bottom:1px solid var(--border)}.mobile-tabs button{flex:1;padding:12px;background:transparent;border:none;color:var(--text-secondary);font-weight:600;cursor:pointer}.mobile-tabs button.active{color:var(--primary);border-bottom:2px solid var(--primary)}.main-content{display:flex;flex:1;overflow:hidden}.pdf-pane,.chat-pane{display:none;flex:1;flex-direction:column;overflow:hidden}.pdf-pane.active,.chat-pane.active{display:flex}.chat-messages{flex:1;overflow-y:auto;padding:20px}.message{margin-bottom:15px;max-width:85%}.message.user{margin-left:auto}.message-bubble{padding:10px 15px;border-radius:12px;font-size:.9rem;line-height:1.4;animation:slideUpFade .3s ease-out}.user .message-bubble{background:var(--primary);color:#fff}.assistant .message-bubble{background:var(--bg-dark);border:1px solid var(--border)}.input-area{padding:15px;background:var(--bg-dark);border-top:1px solid var(--border);display:flex;gap:10px}.input-area input{flex:1;background:#f5f5f5;border:1px solid var(--border);border-radius:20px;padding:8px 15px;color:#333;outline:none}.input-area button{background:var(--primary);color:#fff;border:none;border-radius:8px;padding:0 15px;font-weight:700;cursor:pointer}.citation-link{color:var(--primary);text-decoration:none;font-weight:600;margin:0 2px}.chat-overlay.maximized{width:100vw;height:100vh;max-height:none;bottom:0;right:0;border-radius:0}.chat-overlay.maximized .pdf-pane,.chat-overlay.maximized .chat-pane{display:flex!important}.chat-overlay.maximized .mobile-tabs{display:none}@media(max-width:600px){.chat-overlay{width:100vw;height:100vh;max-height:none;bottom:0;right:0;border-radius:0}}