.app-container{background-color:#fff;flex-direction:column;max-width:500px;height:100vh;margin:0 auto;display:flex;position:relative;box-shadow:0 0 10px #0000001a}.chat-header{color:#fff;text-align:center;background-color:#007bff;padding:15px;font-size:1.2rem;position:relative}.chat-messages{background-color:#f5f5f5;flex-direction:column;flex:1;padding:20px;display:flex;overflow-y:auto}.chat-input-area{background-color:#fff;border-top:1px solid #ddd;padding:10px;position:relative}.input-controls{align-items:center;gap:8px;width:100%;display:flex}.icon-btn{cursor:pointer;background:0 0;border:none;padding:5px;font-size:1.5rem}.color-picker{-webkit-appearance:none;cursor:pointer;border:none;border-radius:50%;width:35px;height:35px;overflow:hidden}.color-picker::-webkit-color-swatch-wrapper{padding:0}.color-picker::-webkit-color-swatch{border:none;border-radius:50%}.text-input{border:1px solid #ccc;border-radius:20px;outline:none;flex:1;padding:10px;font-size:16px}.send-btn{color:#fff;cursor:pointer;white-space:nowrap;background-color:#007bff;border:none;border-radius:20px;padding:10px 20px}.emoji-picker-container{z-index:100;border-radius:10px;position:absolute;bottom:60px;left:10px;box-shadow:0 5px 15px #0003}.message-row{flex-direction:column;margin-bottom:20px;display:flex}.message-row.other{align-items:flex-start}.message-row.me{align-items:flex-end}.sender-name{color:#666;margin-bottom:4px;margin-left:5px;font-size:.8rem}.message-content{align-items:flex-end;gap:8px;max-width:80%;display:flex}.message-row.me .message-content{flex-direction:row-reverse}.bubble{word-wrap:break-word;border-radius:18px;padding:10px 15px;font-size:.95rem;line-height:1.4}.message-row.other .bubble{color:#050505;background-color:#e4e6eb;border-bottom-left-radius:4px}.message-row.me .bubble{background-color:#0084ff;border-bottom-right-radius:4px}.time{color:#999;min-width:35px;font-size:.7rem}.login-screen{background-color:#f0f2f5;justify-content:center;align-items:center}.login-form{background:#fff;border-radius:10px;flex-direction:column;gap:15px;width:80%;padding:30px;display:flex;box-shadow:0 4px 12px #0000001a}.login-form h2{text-align:center;color:#333;margin-bottom:10px}.login-form input{border:1px solid #ccc;border-radius:6px;padding:12px;font-size:16px}.login-form button{color:#fff;cursor:pointer;background-color:#007bff;border:none;border-radius:6px;padding:12px;font-size:16px;font-weight:700}.error-message{color:#d93025;text-align:center;background-color:#fce8e6;border-radius:4px;padding:10px;font-size:.9rem}.logout-btn{color:#fff;cursor:pointer;background:#fff3;border:none;border-radius:15px;padding:5px 10px;font-size:.8rem;position:absolute;top:15px;right:15px}.chat-image{border-radius:12px;max-width:100%;max-height:250px;margin-bottom:5px;display:block}.image-preview-area{z-index:50;background-color:#f0f2f5;border-top:1px solid #ddd;justify-content:center;align-items:center;width:100%;padding:15px;display:flex;position:absolute;bottom:100%;left:0}.image-preview-area img{border-radius:8px;max-height:150px;box-shadow:0 4px 8px #0000001a}.cancel-image-btn{color:#fff;cursor:pointer;background-color:#0009;border:none;border-radius:50%;justify-content:center;align-items:center;width:30px;height:30px;font-size:14px;display:flex;position:absolute;top:10px;right:20px}.cancel-image-btn:hover{background-color:#000c}.send-btn:disabled{cursor:not-allowed;background-color:#a0cbfc}.file-download-link{color:inherit;word-break:break-all;background-color:#0000001a;border-radius:8px;margin-bottom:5px;padding:10px 15px;font-weight:700;text-decoration:none;display:inline-block}.file-download-link:hover{background-color:#0003}.file-preview-area{z-index:50;background-color:#f0f2f5;border-top:1px solid #ddd;width:100%;padding:15px 40px 15px 15px;position:absolute;bottom:100%;left:0}.file-name-display{color:#333;font-size:.9rem;font-weight:700}*{box-sizing:border-box;margin:0;padding:0}body{overscroll-behavior-y:none;background-color:#e0e0e0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}