:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--bg-color: #0f172a;--card-bg: #1e293b;--text-color: #f1f5f9;--text-muted: #94a3b8;--border-color: #334155;--error-color: #ef4444;--success-color: #10b981}*{box-sizing:border-box;margin:0;padding:0}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-color);color:var(--text-color)}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.loading{display:flex;justify-content:center;align-items:center;height:100vh;font-size:1.5rem;color:var(--text-muted)}.auth-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.auth-card{background:var(--card-bg);border-radius:12px;padding:40px;width:100%;max-width:400px;box-shadow:0 4px 6px #0000004d}.auth-card h1{margin-bottom:30px;text-align:center;color:var(--text-color)}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;color:var(--text-muted);font-size:.9rem}.form-group input{width:100%;padding:12px;background:var(--bg-color);border:1px solid var(--border-color);border-radius:6px;color:var(--text-color);font-size:1rem;transition:border-color .2s}.form-group input:focus{outline:none;border-color:var(--primary-color)}.error{background:#ef44441a;border:1px solid var(--error-color);color:var(--error-color);padding:12px;border-radius:6px;margin-bottom:20px;font-size:.9rem}button{width:100%;padding:12px;background:var(--primary-color);color:#fff;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .2s}button:hover:not(:disabled){background:var(--primary-hover)}button:disabled{opacity:.6;cursor:not-allowed}.auth-link{text-align:center;margin-top:20px;color:var(--text-muted);font-size:.9rem}.auth-link a{color:var(--primary-color);text-decoration:none;font-weight:600}.auth-link a:hover{text-decoration:underline}.chat-container{display:flex;flex-direction:column;background:var(--bg-color)}.chat-header{background:var(--card-bg);padding:20px;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.chat-header h1{margin:0;font-size:1.5rem}.chat-header-actions{display:flex;align-items:center;gap:15px}.status{font-size:.9rem;padding:4px 12px;border-radius:12px;background:var(--bg-color)}.status.connected{color:var(--success-color)}.status.disconnected{color:var(--error-color)}.user-email{color:var(--text-muted);font-size:.9rem}.logout-btn{width:auto;padding:8px 16px;background:var(--bg-color);color:var(--text-color);border:1px solid var(--border-color)}.logout-btn:hover{background:var(--border-color)}.messages-container{flex:1;overflow-y:auto;padding:20px;background:var(--bg-color)}.message{margin-bottom:20px;padding:12px 16px;border-radius:8px;max-width:70%}.message.own{background:#facc15;color:#dc2626;margin-left:auto}.message.other{background:var(--card-bg);margin-right:auto}.message-header{display:flex;justify-content:space-between;margin-bottom:6px;font-size:.85rem}.sender{font-weight:600}.timestamp{color:var(--text-muted)}.message.own .timestamp{color:#dc2626b3}.message-content{word-wrap:break-word}.message-input-form{display:flex;align-items:center;gap:10px;padding:20px;background:var(--card-bg);border-top:1px solid var(--border-color)}.message-input-form input{flex:1;padding:12px;background:var(--bg-color);border:1px solid var(--border-color);border-radius:6px;color:var(--text-color);font-size:1rem;min-width:0}.message-input-form input:focus{outline:none;border-color:var(--primary-color)}.message-input-form button{width:auto;padding:12px 24px;white-space:nowrap}.attach-btn{padding:12px!important;font-size:1.2rem;display:flex;align-items:center;justify-content:center}.file-upload-btn{width:auto!important;padding:8px 16px!important;background:var(--card-bg)!important;border:1px solid var(--border-color)!important;font-size:1.2rem}.file-upload-btn:hover:not(:disabled){background:var(--border-color)!important}.file-message{max-width:80%}.file-attachment{display:flex;align-items:center;gap:12px;padding:8px;background:#0003;border-radius:8px}.message.own .file-attachment{background:#0000004d}.file-icon{font-size:2rem;width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:var(--bg-color);border-radius:8px}.image-preview{width:200px;height:auto;border-radius:8px;overflow:hidden}.image-preview img{width:100%;height:auto;display:block;max-height:300px;object-fit:cover}.file-info{flex:1;min-width:0}.file-name{font-weight:600;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-size{font-size:.85rem;color:var(--text-muted)}.message.own .file-size{color:#ffffffb3}.download-btn{padding:8px 16px;background:var(--success-color);color:#fff;text-decoration:none;border-radius:6px;font-size:.9rem;font-weight:600;white-space:nowrap;transition:background-color .2s}.download-btn:hover{background:#059669}.profile-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.profile-card{background:var(--card-bg);border-radius:12px;padding:40px;width:100%;max-width:500px;box-shadow:0 4px 6px #0000004d}.profile-card h1{margin-bottom:30px;text-align:center}.profile-info{margin-bottom:30px}.info-row{display:flex;justify-content:space-between;padding:15px 0;border-bottom:1px solid var(--border-color)}.info-row:last-child{border-bottom:none}.info-row label{font-weight:600;color:var(--text-muted)}.info-row span{color:var(--text-color)}.profile-actions{display:flex;gap:10px}.btn-primary{background:var(--primary-color)}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{background:var(--bg-color);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--border-color)}@media (max-width: 768px){.message{max-width:85%}.chat-header{flex-direction:column;gap:15px}.chat-header-actions{width:100%;justify-content:space-between}}.db-warning{background:#ef4444;color:#fff;padding:10px;border-radius:4px;margin-bottom:15px;font-weight:700;text-align:center}.ticker-container{position:fixed;bottom:0;left:0;height:40px;background-color:#fbbf24;display:flex;align-items:center;overflow:hidden;z-index:1000;border-top:2px solid #b91c1c;box-shadow:0 -2px 10px #0000001a}.ticker-content{white-space:nowrap;color:#b91c1c;font-weight:800;font-size:1.2rem;text-transform:uppercase;letter-spacing:1px;padding-left:100%;animation:ticker-scroll linear infinite}@keyframes ticker-scroll{0%{transform:translateZ(0)}to{transform:translate3d(-100%,0,0)}}.mobile-only{display:none}@media (max-width: 768px){.mobile-only{display:block}.sidebar.hidden-mobile,.chat-container.hidden-mobile{display:none!important}.chat-container{height:100%}}