body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background-color: #f0f0f0;
}

.container {
    text-align: center;
    background-color: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 500px;
}

h1 {
    color: #333;
    margin-bottom: 20px;
    font-size: 24px;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

label {
    font-size: 16px;
    margin-bottom: 5px;
    display: block;
    color: #555;
}

#imageInput, #quality, #outputFormat {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
    margin-top: 5px;
}

.convert-btn {
    background-color: #4caf50;
    color: #fff;
    font-size: 16px;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
    width: 100%;
}

.convert-btn:hover {
    background-color: #45a049;
}

.convert-btn:active {
    transform: scale(0.98);
}

.animated {
    animation: shake 0.5s;
}

.result-message {
    color: #333;
    margin-top: 20px;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    20%, 60% {
        transform: translateX(-10px);
    }
    40%, 80% {
        transform: translateX(10px);
    }
}

#drop-area {
    border: 2px dashed #ddd;
    border-radius: 5px;
    padding: 20px;
    cursor: pointer;
    background-color: #f9f9f9;
}

#drop-area.dragging {
    background-color: #e9e9e9;
}