:root {
  color-scheme: light;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-soft: #eef2f7;
  --ink: #171a21;
  --muted: #5f6877;
  --line: #dbe2ec;
  --accent: #0f6b63;
  --accent-dark: #124b47;
  --shadow: 0 18px 44px rgba(20, 30, 45, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, #fbfcfe 0%, var(--bg) 420px),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

main {
  width: min(1320px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 72px;
}

.hero {
  max-width: 1320px;
  margin: 0 auto 30px;
  text-align: center;
}

.venue {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 0.92rem;
  font-weight: 720;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 1320px;
  margin: 0 auto;
  font-size: clamp(1.58rem, 2.28vw, 2.18rem);
  line-height: 1.16;
  font-weight: 780;
  letter-spacing: 0;
}

h1 span {
  display: block;
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.resource-link {
  min-width: 142px;
  padding: 11px 18px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 10px 28px rgba(20, 30, 45, 0.06);
}

.resource-link span,
.resource-link small {
  display: block;
}

.resource-link span {
  font-size: 0.98rem;
  font-weight: 740;
}

.resource-link small {
  margin-top: 1px;
  color: var(--muted);
  font-size: 0.76rem;
}

.resource-link.disabled {
  cursor: default;
  opacity: 0.78;
}

.resource-link.disabled:hover {
  border-color: #c5d2df;
}

.experiment-summary {
  max-width: 1040px;
  margin: 0 auto 36px;
  padding: 20px 24px;
  border-left: 4px solid var(--accent);
  background: var(--surface);
  box-shadow: 0 12px 30px rgba(20, 30, 45, 0.06);
}

.experiment-summary p {
  margin: 0;
  color: #313946;
  font-size: 1.04rem;
  line-height: 1.72;
  text-align: left;
}

.demo-section {
  margin-top: 38px;
}

.demo-section h2 {
  margin: 0 0 16px;
  color: var(--accent-dark);
  font-size: 1.28rem;
  font-weight: 760;
  letter-spacing: 0;
}

.video-row {
  display: grid;
  gap: 22px;
  align-items: stretch;
}

.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.two-up {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.demo-card {
  display: flex;
  min-width: 0;
  overflow: hidden;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.card-copy {
  min-height: 116px;
  padding: 16px 17px 14px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--surface), #fbfcfe);
}

.card-copy h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.28;
  font-weight: 760;
  letter-spacing: 0;
}

.card-copy p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.42;
}

video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #111827;
  object-fit: contain;
}

@media (max-width: 980px) {
  .three-up,
  .two-up {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  main {
    width: min(100% - 24px, 1180px);
    padding: 34px 0 48px;
  }

  .hero {
    margin-bottom: 24px;
    text-align: left;
  }

  h1 {
    font-size: clamp(1.55rem, 7.6vw, 2.2rem);
  }

  h1 span {
    display: inline;
  }

  .resource-links {
    justify-content: flex-start;
  }

  .resource-link {
    min-width: 132px;
    flex: 0 1 148px;
    text-align: center;
  }

  .experiment-summary {
    margin-bottom: 28px;
    padding: 17px 18px;
  }

  .experiment-summary p {
    font-size: 0.97rem;
    line-height: 1.64;
  }

  .three-up,
  .two-up {
    grid-template-columns: 1fr;
  }

  .card-copy {
    min-height: auto;
  }
}