* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #000000, #f0eeee);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
.converter-container {
    background-color: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    width: 350px;
    text-align: center;
}
input, select {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    margin-bottom: 15px;
    border-radius: 8px;
    border: 1px solid #ccc;
    transition: 0.3s;
}

input:focus, select:focus {
    border-color: #000000;
    outline: none;
}
.select-group {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}
button {
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 8px;
    background-color: #000000;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background-color: #000000;
}