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

html {
    /* for mobile */
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    color: #333;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", Meiryo, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    margin: 0 auto;
    max-width: 1200px;
    padding: 20px;
}

h1 {
    margin: 0.8rem 0;
}

h2, h3, h4, h5 {
    margin: 0.5rem 0;
}

img {
    height: auto;
    margin: 0.5rem 0;
    max-width: 100%;
}

ul, ol {
    padding: 1rem;
}

footer {
    font-size: 0.9rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    text-align: center;
}

/* index page styles */

.index header {
    margin-bottom: 2rem;
}

.posts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.posts-container section {
    max-width: 100%;
    overflow-wrap: break-word;
    word-wrap: break-word;
    padding: 0.5rem;
}

.metadata {
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

/* article page styles */

.article-page nav {
    margin-bottom: 1rem;
}

.article-page nav ul {
    list-style: none;
    padding-left: 0;
}

.article-page ul.metadata {
    font-size: 0.9rem;
    list-style: none;
    padding: 0 0 1rem 0;
}

.article-page h2, .article-page h3, .article-page h4, .article-page h5 {
    margin: 0.8rem 0;
}

.article-page article p {
    margin: 1rem 0;
}