body {
    font-family: Arial, sans-serif;
    background: linear-gradient(to bottom right, #e6e9f0, #eef1f5);
    color: #333333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

header {
    background-color: #2d3748;
    color: white;
    padding: 10px 0;
    width: 100%;
    text-align: center;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
}

h1 {
    margin: 0;
}

main {
    margin-top: 70px;
    /* Add space to ensure main content is below the fixed header */
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.container {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    width: 300px;
    text-align: center;
    color: #333333;
}

label {
    display: block;
    margin-bottom: 10px;
    font-size: 16px;
}

input[type="text"] {
    width: calc(100% - 22px);
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    font-size: 16px;
}

button {
    background-color: #4299e1;
    color: white;
    border: none;
    padding: 10px 15px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 4px;
    width: 100%;
}

button:hover {
    background-color: #2b6cb0;
}

#asciiValue {
    margin-top: 20px;
    font-size: 18px;
    color: #333333;
}