body {
    font-family: Arial, sans-serif;
    background-color: #e0f7fa;
    margin: 0;
    padding: 20px;
}

header {
    text-align: center;
    padding-bottom: 20px;
}

h1 {
    color: #00796b;
}

p {
    max-width: 700px;
    margin: 0 auto 20px auto;
    font-size: 1.1em;
    line-height: 1.5;
}

.tips {
    max-width: 700px;
    margin: 0 auto 30px auto;
    background-color: #ffffff;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

    .tips h2 {
        color: #004d40;
        margin-top: 0;
    }

ul {
    padding-left: 20px;
}

form {
    max-width: 700px;
    margin: 0 auto 30px auto;
    background-color: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

input[type="text"] {
    width: 100%;
    padding: 12px 0px 12px 0px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1em;
}

button {
    background-color: #00796b;
    color: #fff;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
}

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

.submitted-names {
    max-width: 700px;
    margin: 0 auto;
    background-color: #ffffff;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

    .submitted-names h2 {
        margin-top: 0;
        color: #00796b;
    }

.name-list {
    list-style-type: none;
    padding-left: 0;
}

    .name-list li {
        padding: 5px 0;
    }

footer {
    text-align: center;
    margin-top: 30px;
    color: #555;
    font-size: 0.9em;
}