:root {
  color-scheme: light;
  --ink: #172026;
  --muted: #5d6972;
  --line: #d9dedf;
  --paper: #fbfaf7;
  --panel: #ffffff;
  --accent: #0b6f7a;
  --accent-dark: #084e56;
  --warm: #c96f3c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.site-header,
.site-footer,
main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
}

.brand {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 20px;
  font-weight: 650;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
}

main {
  min-height: 62vh;
}

.page-heading,
.course-detail {
  max-width: 760px;
  padding: 80px 0;
}

.intro {
  width: 100%;
  padding: 80px 0;
}

.intro h1,
.page-heading h1,
.course-detail h1 {
  margin: 0 0 20px;
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  line-height: 1;
  letter-spacing: 0;
}

.intro p,
.page-heading p,
.course-detail p {
  font-size: 1.13rem;
}

.intro::after {
  display: block;
  clear: both;
  content: "";
}

.intro-photo {
  float: right;
  width: min(34vw, 320px);
  margin: 0 0 24px 40px;
  border-radius: 8px;
}

.eyebrow,
.item-date {
  margin: 0 0 12px;
  color: var(--warm);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.content-list {
  display: grid;
  gap: 18px;
  padding-bottom: 80px;
}

.list-item {
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.list-item h2 {
  margin: 0 0 8px;
  font-size: 1.55rem;
}

.list-item h2 a {
  color: var(--ink);
  text-decoration: none;
}

.featured-item {
  border-color: var(--accent);
}

.button-link,
button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 750;
  padding: 10px 16px;
  text-decoration: none;
  cursor: pointer;
}

.button-link:hover,
button:hover {
  background: var(--accent-dark);
}

.messages {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto 16px;
}

.message {
  margin: 0;
  padding: 12px 14px;
  border-left: 4px solid var(--accent);
  background: var(--panel);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 420px);
  gap: 32px;
  margin-top: 72px;
  padding: 32px 0 48px;
  border-top: 1px solid var(--line);
}

.footer-title {
  margin: 0 0 10px;
  font-weight: 800;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.subscribe-form label {
  display: block;
  margin-bottom: 8px;
  font-weight: 750;
}

.subscribe-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

input[type="email"] {
  min-height: 44px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  padding: 10px 12px;
}

@media (max-width: 720px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
  }

  .site-header,
  .site-footer,
  .subscribe-row {
    grid-template-columns: 1fr;
  }

  .site-header {
    display: grid;
    gap: 12px;
  }

  .intro,
  .page-heading,
  .course-detail {
    padding: 48px 0;
  }

  .intro-photo {
    float: none;
    width: min(100%, 360px);
    margin: 0 0 24px;
  }
}