:root {
  --bg: #f5f0e8;
  --bg-soft: rgba(255, 250, 243, 0.8);
  --surface: rgba(255, 252, 247, 0.78);
  --surface-strong: #fffdf8;
  --ink: #1f2430;
  --muted: #5d6572;
  --line: rgba(68, 53, 37, 0.14);
  --accent: #0f6a73;
  --accent-deep: #0b4f56;
  --accent-soft: rgba(15, 106, 115, 0.12);
  --shadow: 0 18px 50px rgba(31, 36, 48, 0.08);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Avenir Next", Avenir, "Segoe UI", sans-serif;
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(15, 106, 115, 0.18), transparent 26%),
    radial-gradient(circle at bottom right, rgba(201, 139, 48, 0.15), transparent 30%),
    linear-gradient(180deg, #f8f4ed 0%, #f2ebe0 100%);
}

a {
  color: inherit;
  text-decoration-color: rgba(15, 106, 115, 0.38);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-color: var(--accent);
}

img {
  max-width: 100%;
  display: block;
}

.page-shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.hero,
.card,
.session-card {
  backdrop-filter: blur(16px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.95fr);
  gap: 1.5rem;
  align-items: stretch;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255, 253, 248, 0.92), rgba(250, 244, 235, 0.74));
  box-shadow: var(--shadow);
  animation: rise-in 0.75s ease both;
}

.hero-copy h1,
.section-heading h2,
.card h2,
.session-card h3 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero-copy h1 {
  max-width: 12ch;
  font-size: clamp(2.5rem, 4vw, 4.8rem);
}

.eyebrow,
.session-label {
  margin: 0 0 0.65rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.lede {
  max-width: 42rem;
  margin: 1.1rem 0 0;
  font-size: 1.1rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.82rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  text-decoration: none;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  box-shadow: 0 14px 28px rgba(11, 79, 86, 0.24);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.58);
  border-color: rgba(15, 106, 115, 0.18);
}

.hero-panel,
.card,
.session-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-panel {
  padding: 1.4rem;
}

.facts {
  margin: 0;
}

.facts div + div {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.facts dt {
  margin: 0 0 0.2rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.facts dd {
  margin: 0;
  color: var(--muted);
}

.section {
  margin-top: 1.7rem;
}

.grid-two {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.card {
  padding: 1.6rem;
  animation: rise-in 0.8s ease both;
}

.card p:last-child,
.session-card p:last-child {
  margin-bottom: 0;
}

.compact-list,
.reference-list {
  margin: 1rem 0 0;
  padding-left: 1.15rem;
}

.github-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.github-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line);
}

.github-entry:first-child {
  border-top: 0;
  padding-top: 0;
}

.github-meta {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.github-meta a {
  color: var(--muted);
}

.github-button-frame {
  border: 0;
  flex: 0 0 auto;
}

.logo-strip,
.funding-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.3rem;
}

.logo-strip img {
  height: 56px;
  width: auto;
}

.section-heading {
  margin-bottom: 1rem;
}

.section-heading p:last-child {
  max-width: 46rem;
  color: var(--muted);
}

.session-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.session-card {
  padding: 1.4rem;
  background:
    linear-gradient(180deg, rgba(255, 253, 248, 0.92), rgba(255, 250, 243, 0.86)),
    var(--surface-strong);
  animation: rise-in 0.85s ease both;
}

.session-card-center {
  text-align: center;
}

.session-card p {
  color: var(--muted);
}

.resource-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.resource-group-center {
  justify-content: center;
}

.resource-link {
  display: inline-flex;
  align-items: center;
  padding: 0.62rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 700;
  text-decoration: none;
}

.resource-link:hover {
  background: rgba(15, 106, 115, 0.18);
}

.resource-link-muted {
  background: rgba(93, 101, 114, 0.08);
  color: var(--muted);
}

.subresources {
  margin-top: 0.85rem;
  font-size: 0.96rem;
}

.funding p {
  max-width: 52rem;
}

.funding-logos {
  justify-content: space-between;
}

.funding-logos img {
  max-height: 96px;
  width: auto;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .hero,
  .grid-two,
  .session-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: none;
  }

  .github-entry {
    align-items: flex-start;
    flex-direction: column;
  }

  .funding-logos {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .page-shell {
    width: min(100% - 1rem, 1120px);
    padding-top: 0.75rem;
  }

  .hero,
  .card,
  .session-card {
    padding: 1.2rem;
  }

  .hero-actions,
  .resource-group {
    flex-direction: column;
    align-items: stretch;
  }

  .button,
  .resource-link {
    justify-content: center;
  }
}