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

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #72edf2 10%, #5151e5 100%);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#wrapper {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
    width: 400px;
}

#wrapper:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.Height-Converter {
    text-align: center;
}

h1 {
    margin-bottom: 20px;
    color: #00796b;
    animation-name: scaleHeading;
    animation-duration: 0.8s;
    animation-iteration-count: infinite;
    animation-timing-function: ease;
    animation-delay: 0.5s;
    animation-direction: alternate;
}

@keyframes scaleHeading {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.1);
    }
}

label {
    display: block;
    margin-top: 20px;
    font-weight: bold;
    color: #004d40;
}

input, select, button {
    width: 100%;
    padding: 15px;
    margin-top: 10px;
    border-radius: 5px;
    border: 1px solid #cccccc;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

input:focus, select:focus {
    border-color: #00796b;
    background-color: #e0f2f1;
}

button {
    background-color: #00796b;
    color: #ffffff;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #004d40;
}

#result {
    margin-top: 20px;
    font-size: 1.2em;
    font-weight: bold;
    color: #00796b;
}