:root {
    --mu-crimson: #98012e;
    --mu-charcoal: #1f1f2b;
    --mu-stone: #4a4a5a;
    --mu-cream: #f7f4f1;
    --mu-warm-gray: #ded9d2;
    --mu-link: #005c99;
    --radius: 18px;
    scroll-behavior: smooth;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
    color: var(--mu-charcoal);
    background: #fdfbfa;
}

a {
    color: var(--mu-link);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.site-header {
    padding: 1.5rem 5vw 1rem;
    background: #fff;
    border-bottom: 1px solid var(--mu-warm-gray);
}

.brand {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.brand__mark {
    height: 60px;
}

.brand h1 {
    margin: 0;
    font-size: clamp(1.8rem, 3vw, 2.2rem);
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--mu-crimson);
    margin: 0 0 0.35rem;
}

.tagline {
    margin: 0.5rem 0 0;
    color: var(--mu-stone);
}

.primary-nav {
    margin-top: 1.5rem;
    border-top: 1px solid var(--mu-warm-gray);
    border-bottom: 1px solid var(--mu-warm-gray);
    padding: 0.75rem 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.primary-nav a {
    padding: 0.35rem 0.85rem;
    font-weight: 600;
    border-radius: 999px;
    color: var(--mu-charcoal);
}

.primary-nav a.is-current {
    background: var(--mu-crimson);
    color: #fff;
    text-decoration: none;
}

main {
    padding: 2.5rem 5vw 4rem;
}

.hero {
    padding: 1.8rem 2rem;
    border-radius: var(--radius);
    background: linear-gradient(120deg, rgba(152, 1, 46, 0.08), rgba(0, 92, 153, 0.05));
}

.hero p {
    max-width: none;
    font-size: 1rem;
    color: var(--mu-stone);
    margin: 0.5rem 0;
}

.hero p:first-child {
    margin-top: 0;
}

.focus-list {
    margin-top: 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.focus-list span {
    background: #fff;
    border-radius: 999px;
    padding: 0.35rem 0.9rem;
    border: 1px solid var(--mu-warm-gray);
    font-size: 0.9rem;
    color: var(--mu-charcoal);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-top: 2rem;
}

.card {
    background: #fff;
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--mu-warm-gray);
    min-height: 160px;
}

.card h3 {
    margin-top: 0;
    color: var(--mu-crimson);
    font-size: 1.1rem;
}

.list-block {
    background: #fff;
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--mu-warm-gray);
    margin-top: 1.5rem;
}

.list-block ul {
    margin: 0.75rem 0 0;
    padding-left: 1.2rem;
    color: var(--mu-stone);
}

.pub-cards {
    display: grid;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.pub-card h3 {
    margin-top: 0;
    color: var(--mu-charcoal);
}

.pub-card p {
    margin-bottom: 0.6rem;
}

.pub-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin: 0.4rem 0 0.8rem;
}

.pub-links a {
    font-weight: 600;
    border: 1px solid var(--mu-warm-gray);
    border-radius: 999px;
    padding: 0.25rem 0.85rem;
    color: var(--mu-charcoal);
    background: #fff;
}

.pub-links a:hover {
    background: var(--mu-cream);
}

.section-heading {
    margin-top: 3rem;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.code-block {
    position: relative;
    background: #0d1117;
    color: #f6f8fa;
    border-radius: 12px;
    font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
    font-size: 0.9rem;
    margin: 1rem 0;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.code-block pre {
    margin: 0;
    padding: 1rem;
    overflow-x: auto;
}

.code-block code {
    white-space: pre;
    display: block;
}

.code-block__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.9rem 0 0.9rem;
    gap: 0.5rem;
}

.code-block__label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.7);
}

.code-block__button {
    border: none;
    border-radius: 6px;
    padding: 0.25rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.15);
    color: #f6f8fa;
    transition: background 0.2s ease;
}

.code-block__button:hover,
.code-block__button:focus {
    background: rgba(255, 255, 255, 0.25);
}

.code-block pre code {
    padding: 0;
}

.code-block--tight {
    margin-top: 0.5rem;
}

.people-section {
    display: grid;
    gap: 1.5rem;
    margin-top: 1rem;
}

.people-section article {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--mu-warm-gray);
    padding: 1.25rem 1.5rem;
}

.people-section h3 {
    margin-top: 0;
    color: var(--mu-crimson);
}

.people-section ul {
    margin: 0.5rem 0 0;
    padding-left: 1rem;
}

.course-list {
    list-style: none;
    margin: 0.5rem 0 0;
    padding: 0;
}

.course-list li {
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--mu-warm-gray);
}

.course-list li:last-child {
    border-bottom: 0;
}

.course-list strong {
    color: var(--mu-crimson);
    display: inline-block;
    min-width: 110px;
}

.site-footer {
    border-top: 1px solid var(--mu-warm-gray);
    padding: 1.5rem 5vw;
    background: #fff;
    text-align: center;
    font-size: 0.95rem;
}

.site-footer img {
    height: 46px;
    display: block;
    margin: 0 auto 0.75rem;
}

@media (max-width: 640px) {
    .primary-nav {
        flex-direction: column;
    }
}