/* ---------- Base ---------- */

* {
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    background-color: #f4f6f8;
    color: #24292f;
    line-height: 1.6;
}

a {
    color: #0969da;
}

a:hover {
    text-decoration: none;
}


/* ---------- Header ---------- */

header {
    background-color: #161b22;
    color: white;
    padding: 25px 20px;
}

.header-container {
    max-width: 1000px;
    margin: auto;
}

header h1 {
    margin: 0;
    font-size: 1.8rem;
}

.tagline {
    color: #b1bac4;
    margin: 5px 0 15px 0;
}


/* ---------- Navigation ---------- */

nav {
    margin-top: 15px;
}

nav a {
    color: #f0f6fc;
    text-decoration: none;
    margin-right: 25px;
    font-weight: bold;
}

nav a:hover {
    color: #58a6ff;
}


/* ---------- Main Content ---------- */

main {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

section {
    background-color: white;
    padding: 30px;
    margin-bottom: 25px;
    border-radius: 8px;
    border: 1px solid #d0d7de;
}

h2 {
    margin-top: 0;
}

h2,
h3,
h4 {
    color: #1f2328;
}


/* ---------- Blog Posts ---------- */

.post-preview {
    border-bottom: 1px solid #d8dee4;
    padding: 20px 0;
}

.post-preview:last-child {
    border-bottom: none;
}

.post-preview h3 {
    margin: 0;
}

.post-preview h3 a {
    text-decoration: none;
}

.post-preview h3 a:hover {
    text-decoration: underline;
}

.post-date {
    color: #656d76;
    font-size: 0.9rem;
}


/* ---------- Articles ---------- */

article {
    max-width: 800px;
}

article h2 {
    font-size: 2rem;
    margin-bottom: 5px;
}

article h3 {
    margin-top: 35px;
    border-bottom: 1px solid #d8dee4;
    padding-bottom: 5px;
}

article p {
    margin: 18px 0;
}


/* ---------- Code ---------- */

code {
    font-family: Consolas, "Courier New", monospace;
    background-color: #eff1f3;
    padding: 2px 6px;
    border-radius: 4px;
}

pre {
    background-color: #161b22;
    color: #f0f6fc;
    padding: 18px;
    border-radius: 6px;
    overflow-x: auto;
    line-height: 1.5;
}

pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
}


/* ---------- Technical Callouts ---------- */

.note {
    background-color: #ddf4ff;
    border-left: 4px solid #0969da;
    padding: 15px 20px;
    margin: 25px 0;
}

.warning {
    background-color: #fff8c5;
    border-left: 4px solid #9a6700;
    padding: 15px 20px;
    margin: 25px 0;
}


/* ---------- Footer ---------- */

footer {
    text-align: center;
    color: #656d76;
    padding: 25px;
    font-size: 0.9rem;
}


/* ---------- Mobile ---------- */

@media (max-width: 600px) {

    header {
        padding: 20px;
    }

    nav a {
        display: inline-block;
        margin: 5px 15px 5px 0;
    }

    main {
        margin: 20px auto;
    }

    section {
        padding: 20px;
    }

    article h2 {
        font-size: 1.6rem;
    }
}