html,
body {
    margin: 0;
    padding: 0;
    background-color: #ffffff;
    font-family: "dnp-shuei-mgothic-std", sans-serif;
    color: #000000;
    line-height: 1.75;
    font-size: 16px;
    max-width: 600px;
}

.container {
    max-width: 100%;
    width: 90%;
    margin: 1rem;
    padding: 1rem;
    box-sizing: border-box;
}

h1 {
    font-size: 1.55rem;
    color: #007BFF;
    margin-bottom: 1rem;
    text-align: center;
    line-height: 1.3;
}

h2 {
    font-size: 1.15rem;
    color: black;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

p {
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-left: 1em;
    text-indent: -1em;
}

@media (min-width: 768px) {
    .container {
        max-width: 800px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    p {
        font-size: 1.1rem;
    }
}