:root {
  color: #172033;
  background: #f7f9fc;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

.hero {
  background: linear-gradient(135deg, #14213d 0%, #1d4ed8 100%);
  color: #ffffff;
  padding: 1.5rem clamp(1rem, 5vw, 4rem) 5rem;
}

.nav {
  align-items: center;
  display: flex;
  gap: 1.5rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1100px;
}

.nav a {
  color: inherit;
  font-weight: 700;
  text-decoration: none;
}

.logo {
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.hero__content {
  margin: 5rem auto 0;
  max-width: 760px;
  text-align: center;
}

.eyebrow {
  color: #fbbf24;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  margin: 0 0 0.75rem;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.05;
  margin: 0;
}

h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

p {
  font-size: 1.05rem;
  line-height: 1.7;
}

main {
  margin: -2.5rem auto 0;
  max-width: 1100px;
  padding: 0 clamp(1rem, 5vw, 4rem) 4rem;
}

.topic-card,
.resources,
.upload-invitation {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 24px;
  box-shadow: 0 24px 70px rgba(20, 33, 61, 0.12);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.topic-card {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
}

.checklist {
  display: grid;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.checklist li {
  background: #eef4ff;
  border-radius: 16px;
  color: #1e3a8a;
  font-weight: 700;
  padding: 1rem;
}

.resources,
.upload-invitation {
  margin-top: 1.5rem;
}

.section-heading {
  max-width: 760px;
}

.section-heading p:last-child {
  color: #4b5563;
}

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

.resource-card {
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
  border: 1px solid #dbeafe;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1.35rem;
}

.resource-card__tag {
  align-self: flex-start;
  background: #dbeafe;
  border-radius: 999px;
  color: #1e40af;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1;
  margin: 0;
  padding: 0.5rem 0.7rem;
  text-transform: uppercase;
}

.resource-card h3 {
  color: #111827;
  font-size: 1.35rem;
  line-height: 1.2;
  margin: 0;
}

.resource-card p:not(.resource-card__tag) {
  color: #4b5563;
  flex: 1;
  font-size: 0.98rem;
  margin: 0;
}

.resource-card a {
  color: #1d4ed8;
  font-weight: 800;
  text-decoration: none;
}

.resource-card a::after {
  content: " →";
}

@media (max-width: 720px) {
  .topic-card,
  .resource-grid {
    grid-template-columns: 1fr;
  }

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