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

html {
    height: 100%;
    margin: 0;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f0f0f0;
    margin: 0;
    padding-left: 0;
    padding-right: 0;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    height: 100%;
}

main {
    flex: 1;
    max-width: 900px;
    margin: auto;
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.container {
    padding: 20px;
}

section {
    margin-bottom: 2em;
    border-left: 4px solid #6699cc;
    padding-left: 1em;
}

h1 {
    text-align: center;
    color: #222;
    font-size: clamp(1.5rem, 4vw, 2em);
    margin-bottom: 0.5em;
}

h2 {
    color: #336699;
    border-bottom: 1px solid #ddd;
    padding-bottom: 0.3em;
}

p {
    line-height: 1.8;
    color: #333;
}

ul {
    list-style-type: disc;
    padding-left: 2em;
    margin: 0.5em 0 0.5em 0;
}

li {
    margin-bottom: 0.4em;
}

em,
.highlight-red {
    color: #cc3333;
    font-weight: bold;
}

a {
    color: #336699;
    text-decoration: underline;
}

a:hover {
    color: #224466;
}

@media screen and (max-width: 600px) {
    .container {
        padding: 15px;
    }

    h2 {
        font-size: 1.3em;
    }
}

@media (max-width: 480px) {
    main {
        padding: 10px;
    }
}