:root {
  --bg: #091218;
  --surface: #102028;
  --surface-2: #132a34;
  --ink: #e6f0f5;
  --muted: #a8bec9;
  --accent: #5de2c4;
  --accent-2: #80a9ff;
  --border: #285060;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 20%, #113544 0%, transparent 35%),
    radial-gradient(circle at 85% 30%, #1d2f56 0%, transparent 32%),
    var(--bg);
  line-height: 1.55;
}

.container {
  width: min(980px, 92vw);
  margin: 0 auto;
}

.hero {
  position: relative;
  min-height: 52vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-image: url("https://images.unsplash.com/photo-1620712943543-bcc4688e7485?auto=format&fit=crop&w=2000&q=80");
  background-size: cover;
  background-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, rgba(3, 13, 16, 0.88), rgba(9, 23, 37, 0.56)),
    linear-gradient(25deg, rgba(17, 94, 89, 0.28), rgba(71, 88, 201, 0.22));
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 4.5rem 0;
  animation: rise 800ms ease-out;
}

.kicker {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--accent);
  font-size: 0.82rem;
}

h1,
h2,
summary {
  font-family: "Space Grotesk", sans-serif;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  line-height: 1.04;
  max-width: 14ch;
}

.topic-line {
  max-width: 60ch;
  margin-top: 1rem;
  color: #def5ff;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
}

.section-heading {
  padding: 2.2rem 0 1.3rem;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.2vw, 2rem);
}

.section-heading p {
  margin: 0.45rem 0 0;
  color: var(--muted);
}

.seminar-list {
  display: grid;
  gap: 1rem;
  padding-bottom: 3rem;
}

.seminar {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: linear-gradient(165deg, var(--surface), var(--surface-2));
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(4, 12, 16, 0.34);
}

.seminar summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.1rem;
}

.seminar summary::-webkit-details-marker {
  display: none;
}

.summary-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: space-between;
}

.status-pill {
  padding: 0.22rem 0.62rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}

.status-completed {
  background: rgba(93, 226, 196, 0.18);
  color: #90ffe5;
}

.status-upcoming {
  background: rgba(128, 169, 255, 0.17);
  color: #c0d4ff;
}

.summary-title {
  margin: 0.35rem 0 0;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.summary-meta {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.summary-prominent {
  margin-top: 0.9rem;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(128, 169, 255, 0.14), rgba(93, 226, 196, 0.12));
  border: 1px solid rgba(128, 169, 255, 0.28);
  display: grid;
  gap: 0.45rem;
}

.prominent-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.prominent-label {
  min-width: 6.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
}

.prominent-value {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink);
}

.prominent-register {
  display: inline-block;
  text-decoration: none;
  color: #001314;
  background: linear-gradient(135deg, var(--accent), #8debd7);
  padding: 0.42rem 0.85rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
}

.prominent-register:hover {
  filter: brightness(1.08);
}

.seminar-body {
  padding: 0 1.1rem 1.2rem;
  border-top: 1px solid rgba(40, 80, 96, 0.55);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.65rem 1.1rem;
  margin: 1rem 0;
}

.meta-item {
  color: #d6e5ed;
}

.meta-item strong {
  color: var(--ink);
}

.body-section h3 {
  margin: 1rem 0 0.4rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
}

.body-section p {
  margin: 0;
  color: #d9e8ef;
}

.resource-links {
  margin-top: 0.95rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.resource-links a {
  text-decoration: none;
  color: #001314;
  background: linear-gradient(135deg, var(--accent), #8debd7);
  padding: 0.45rem 0.72rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
}

.resource-links a.secondary {
  background: linear-gradient(135deg, #b3cbff, #89afff);
}

.site-footer {
  border-top: 1px solid rgba(40, 80, 96, 0.65);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-content {
  padding: 1.2rem 0;
}

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

@media (max-width: 680px) {
  .hero {
    min-height: 45vh;
  }

  .hero-content {
    padding: 3.1rem 0;
  }

  .seminar summary {
    padding: 0.9rem;
  }

  .seminar-body {
    padding: 0 0.9rem 1rem;
  }
}