* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #6a11cb, #2575fc); 
    color: #333; 
}

.container {
    text-align: center;
    background: #ffffff; 
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1); 
}

h1 {
    margin-bottom: 20px;
    font-size: 2.5em;
    color: #333; 
}

.converter {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.input-section, .output-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 15px;
}

label {
    font-size: 1em;
    margin-bottom: 5px;
    color: #555; 
}

input, select {
    padding: 10px;
    margin: 5px 0;
    border: 1px solid #ccc; 
    border-radius: 5px;
    font-size: 1em;
    width: 100%;
    max-width: 300px;
    color: #333; 
}

input[readonly] {
    background-color: #f0f0f0; 
    color: #333;
}

#swapButton, #convertButton {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: #2575fc; 
    color: white;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin: 10px;
    width: 100%;
    max-width: 200px;
}

#swapButton:hover, #convertButton:hover {
    background-color: #6a11cb; 
}