:root {
    color-scheme: light;
    font-family: Lato, "Segoe UI", "Noto Sans", "Liberation Sans", sans-serif;
    color: #242424;
    background: #f8f9fb;
    font-synthesis: none;
}

* {
    box-sizing: border-box;
}

html {
    line-height: 1.5;
}

body {
    min-width: 20rem;
    margin: 0;
    background:
        radial-gradient(
            circle at 95% 5%,
            rgb(53 132 228 / 14%),
            transparent 34rem
        ),
        #f8f9fb;
}

a {
    color: #0461be;
    text-decoration-thickness: 0.12em;
    text-underline-offset: 0.18em;
}

a:hover {
    color: #003f80;
}

a:focus-visible {
    border-radius: 0.2rem;
    outline: 0.2rem solid #0461be;
    outline-offset: 0.2rem;
}

.skip-link {
    position: fixed;
    z-index: 10;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.7rem 1rem;
    border-radius: 0.5rem;
    background: #fff;
    box-shadow: 0 0.25rem 1rem rgb(0 0 0 / 18%);
    transform: translateY(-200%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    border-bottom: 1px solid #c9cdd2;
    background: rgb(255 255 255 / 88%);
}

.header-inner,
main,
footer {
    width: min(72rem, calc(100% - 2rem));
    margin-inline: auto;
}

.header-inner {
    display: flex;
    gap: 0.8rem;
    align-items: baseline;
    padding-block: 1rem;
}

.header-inner p {
    margin: 0;
}

.course-code {
    color: #0461be;
    font-weight: 800;
    letter-spacing: 0.08em;
}

main {
    padding-block: clamp(3rem, 8vw, 7rem) 4rem;
}

section + section {
    margin-top: clamp(3.5rem, 8vw, 6rem);
}

.hero {
    max-width: 58rem;
}

.eyebrow {
    margin: 0 0 0.5rem;
    color: #52606d;
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    line-height: 1.12;
    text-wrap: balance;
}

h1 {
    max-width: 14ch;
    margin: 0;
    font-size: clamp(2.75rem, 9vw, 6rem);
    letter-spacing: -0.045em;
}

h2 {
    margin: 0;
    font-size: clamp(2rem, 5vw, 3.25rem);
    letter-spacing: -0.03em;
}

h3 {
    margin: 0;
    font-size: 1.35rem;
}

.lede {
    max-width: 48rem;
    margin: 1.75rem 0 0;
    color: #3c4650;
    font-size: clamp(1.25rem, 2.5vw, 1.65rem);
    line-height: 1.45;
}

.section-heading {
    margin-bottom: 1.5rem;
}

.material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
    gap: 1rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.material-card {
    padding: 1.5rem;
    border: 1px solid #c9cdd2;
    border-radius: 0.85rem;
    background: #fff;
    box-shadow: 0 0.35rem 1rem rgb(34 45 55 / 7%);
}

.material-card p {
    margin-bottom: 0;
}

.topics {
    color: #52606d;
    font-size: 0.95rem;
}

.topics span {
    color: #242424;
    font-weight: 700;
}

.about {
    max-width: 54rem;
    padding-top: 2.5rem;
    border-top: 1px solid #c9cdd2;
}

.about > p {
    font-size: 1.1rem;
}

footer {
    padding-block: 1.5rem 2.5rem;
    border-top: 1px solid #c9cdd2;
    color: #52606d;
}

footer p {
    margin: 0;
}

@media (max-width: 32rem) {
    .header-inner {
        display: block;
    }

    h1 {
        overflow-wrap: anywhere;
    }
}

@media (prefers-reduced-motion: no-preference) {
    a {
        transition: color 120ms ease;
    }
}