html, body {
  background: #fff;
  color: #363636;
  margin: 0;
  font: 16px/1.6 "Noto Sans", "Segoe UI", Helvetica, Arial, sans-serif;
}

a { color: #3273dc; text-decoration: none; }
a:hover { text-decoration: underline; }

.hero {
  text-align: center;
  padding: 48px 20px 8px;
  max-width: 920px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.15rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 8px;
  color: #363636;
}

.hero .subhead {
  font-size: 1.25rem;
  font-weight: 500;
  margin: 0 0 16px;
  color: #363636;
}

.hero .authors { font-size: 1.12rem; margin: 0 0 4px; }
.hero .affil { font-size: 1.02rem; color: #4a4a4a; margin: 0; }

.summary {
  max-width: 760px;
  margin: 22px auto 0;
  text-align: center;
  color: #4a4a4a;
  font-size: 1.02rem;
  padding: 0 20px;
}

.strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 16px;
  max-width: 1280px;
  margin: 28px auto 0;
  padding: 0 16px;
}

.strip video, .grid video {
  width: 100%;
  display: block;
  border-radius: 6px;
  background: #fff;
}

.strip .name {
  text-align: center;
  font-size: 0.92rem;
  color: #4a4a4a;
  margin-top: 4px;
}

section {
  max-width: 1280px;
  margin: 46px auto 0;
  padding: 0 20px;
}

section h2 {
  text-align: center;
  font-size: 1.65rem;
  font-weight: 700;
  margin: 0 0 6px;
  color: #363636;
}

section p.sub {
  text-align: center;
  color: #4a4a4a;
  margin: 0 auto 18px;
  max-width: 760px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 28px 22px;
  align-items: start;
}

.item video {
  width: 100%;
  display: block;
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

.item p {
  margin: 8px 4px 0;
  color: #4a4a4a;
  font-size: 0.96rem;
  text-align: center;
}

footer {
  text-align: center;
  color: #7a7a7a;
  font-size: 0.9rem;
  margin: 54px 0 30px;
  padding: 0 20px;
}

@media (max-width: 700px) {
  .hero h1 { font-size: 1.65rem; }
  .grid { grid-template-columns: 1fr; }
}