body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f3f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: #333;
}

.container {
    width: 100%;
    max-width: 400px;
    background-color: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    text-align: center;
}

h1 {
    font-size: 1.8em;
    color: #007bff;
    margin-bottom: 30px;
}

label {
    display: block;
    text-align: left;
    margin-top: 15px;
    font-weight: 600;
}

select, button {
    width: 100%;
    padding: 12px;
    margin-top: 8px;
    border-radius: 5px;
    border: 1px solid #ddd;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

select:hover, select:focus,
button:hover, button:focus {
    border-color: #007bff;
    outline: none;
}

button {
    background-color: #007bff;
    color: white;
    font-weight: bold;
    border: none;
    cursor: pointer;
    margin-top: 20px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}

#dimensions {
    margin-top: 20px;
    padding: 15px;
    background-color: #e9e9e9;
    border-radius: 5px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
}

#dimensions p {
    margin: 5px 0;
    font-size: 1.1em;
}