.login-container{display:flex;justify-content:center;align-items:center;height:100vh;background-color:#f7f9fc;padding:1rem}.login-form{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 4px 12px #0000001a;width:100%;max-width:400px;display:flex;flex-direction:column}.login-title{text-align:center;margin-bottom:1.5rem;font-size:1.5rem;color:#333}.login-input{margin-bottom:1rem;padding:.8rem 1rem;border:1px solid #ccc;border-radius:8px;font-size:1rem;outline:none;transition:border .3s ease}.login-input:focus{border-color:#007bff}.login-button{padding:.8rem 1rem;background-color:#007bff;color:#fff;font-size:1rem;font-weight:600;border:none;border-radius:8px;cursor:pointer;transition:background .3s ease}.login-button:hover{background-color:#0056b3}.login-register-text{text-align:center;margin-top:1rem;font-size:.95rem;color:#555}.login-register-link{color:#007bff;text-decoration:none;font-weight:600;margin-left:4px;transition:color .3s ease}.login-register-link:hover{color:#0056b3;text-decoration:underline}@media (max-width: 480px){.login-form{padding:1.5rem}.login-title{font-size:1.3rem}.login-input,.login-button{font-size:.9rem;padding:.7rem .9rem}}.register-container{display:flex;justify-content:center;align-items:center;height:100vh;background-color:#f7f9fc;padding:1rem}.register-form{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 4px 12px #0000001a;width:100%;max-width:400px;display:flex;flex-direction:column}.register-title{text-align:center;margin-bottom:1.5rem;font-size:1.5rem;color:#333}.register-input{margin-bottom:1rem;padding:.8rem 1rem;border:1px solid #ccc;border-radius:8px;font-size:1rem;outline:none;transition:border .3s ease}.register-input:focus{border-color:#007bff}.register-button{padding:.8rem 1rem;background-color:#28a745;color:#fff;font-size:1rem;font-weight:600;border:none;border-radius:8px;cursor:pointer;transition:background .3s ease}.register-button:hover{background-color:#218838}.register-login-text{text-align:center;margin-top:1rem;font-size:.95rem;color:#555}.register-login-link{color:#007bff;text-decoration:none;font-weight:600;margin-left:4px;transition:color .3s ease}.register-login-link:hover{color:#0056b3;text-decoration:underline}@media (max-width: 480px){.register-form{padding:1.5rem}.register-title{font-size:1.3rem}.register-input,.register-button{font-size:.9rem;padding:.7rem .9rem}}.newchat-container{padding:20px;max-width:600px;margin:0 auto}.newchat-title{font-size:1.5rem;font-weight:700;margin-bottom:20px;text-align:center;color:#333}.newchat-empty{text-align:center;color:#666;font-size:1rem}.newchat-list{list-style:none;padding:0;margin:0}.newchat-item{display:flex;justify-content:space-between;align-items:center;padding:12px 15px;margin-bottom:10px;background:#f9f9f9;border-radius:8px;border:1px solid #ddd;transition:background .2s ease}.newchat-item:hover{background:#f0f4ff}.newchat-username{font-size:1rem;font-weight:500;color:#333}.newchat-btn{padding:6px 12px;font-size:.9rem;border:none;border-radius:6px;background-color:#007bff;color:#fff;font-weight:600;cursor:pointer;transition:background .3s ease}.newchat-btn:hover{background-color:#0056b3}@media (max-width: 480px){.newchat-item{flex-direction:column;align-items:flex-start;gap:8px}.newchat-btn{width:100%;text-align:center;padding:8px}}.chat-container{display:flex;height:100vh;font-family:Arial,sans-serif}.chat-sidebar{width:30%;border-right:1px solid #ddd;padding:10px;overflow-y:auto;background:#fdfdfd}.chat-sidebar-title{margin:0 0 10px;font-weight:700}.chat-conversation{display:flex;justify-content:space-between;align-items:center;padding:8px;margin:5px 0;border-radius:8px;cursor:pointer;transition:background .2s}.chat-conversation:hover{background:#f1f1f1}.chat-conversation.active{background:#e6f0ff}.chat-conversation-info{max-width:75%}.chat-conversation-name{font-weight:500}.chat-conversation-name.bold{font-weight:700}.chat-conversation-preview{font-size:12px;color:gray;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-conversation-preview.unread{color:#000;font-weight:600}.chat-conversation-meta{text-align:right;font-size:12px;color:gray}.chat-conversation-unread{background:#1d9bf0;color:#fff;border-radius:999px;padding:4px 8px;font-size:12px;min-width:20px;display:inline-block;text-align:center;font-weight:700}.chat-main{flex:1;display:flex;flex-direction:column;background:#f8f9fa}.chat-messages{flex:1;overflow-y:auto;padding:15px;display:flex;flex-direction:column;gap:10px}.chat-message{max-width:70%;padding:10px 14px;border-radius:16px;position:relative;word-wrap:break-word;font-size:14px}.chat-message.mine{align-self:flex-end;background:#dcf8c6;border-bottom-right-radius:4px}.chat-message.theirs{align-self:flex-start;background:#fff;border:1px solid #e5e5e5;border-bottom-left-radius:4px}.chat-message-text{margin-bottom:4px}.chat-message-time{font-size:11px;color:gray;text-align:right}.chat-input-area{display:flex;padding:10px;border-top:1px solid #ddd;background:#fff}.chat-input{flex:1;padding:10px;border:1px solid #ccc;border-radius:20px;outline:none;font-size:14px}.chat-input:focus{border-color:#1d9bf0}.chat-send-btn{margin-left:8px;padding:0 18px;border:none;border-radius:20px;background:#1d9bf0;color:#fff;font-weight:700;cursor:pointer;transition:background .2s}.chat-send-btn:hover{background:#0d8ae8}.chat-empty{flex:1;display:flex;align-items:center;justify-content:center;color:gray}@media (max-width: 768px){.chat-container{flex-direction:column}.chat-sidebar{width:100%;border-right:none;border-bottom:1px solid #ddd}.chat-main{flex:1}}.navbar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background-color:#222;color:#fff;flex-wrap:wrap}.navbar-title{margin:0;font-size:1.25rem;font-weight:700}.navbar-user{font-size:.95rem;margin:8px 0}.navbar-actions{display:flex;gap:10px}.navbar-btn{padding:6px 12px;border:none;border-radius:6px;cursor:pointer;font-size:.9rem;font-weight:600;transition:background .3s ease,color .3s ease}.navbar-btn:hover{background-color:#444;color:#fff}.logout-btn{background-color:#e74c3c;color:#fff}.logout-btn:hover{background-color:#c0392b}@media (max-width: 600px){.navbar{flex-direction:column;align-items:flex-start;padding:10px}.navbar-actions{width:100%;justify-content:flex-start;margin-top:8px}.navbar-btn{font-size:.85rem;padding:5px 10px}}