.lecture-page {
  background: var(--ink);
  color: var(--paper);
}

.lecture-header {
  border-color: var(--dark-line);
}

.back-link {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lecture-intro {
  min-height: 530px;
  padding: 70px clamp(22px, 4vw, 64px) 80px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  grid-template-rows: auto 1fr auto;
  align-items: end;
}

.lecture-kicker {
  align-self: start;
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.lecture-kicker::before {
  content: "●";
  margin-right: 9px;
  color: var(--dark-muted);
}

.lecture-intro h1 {
  grid-column: 1 / -1;
  align-self: center;
  margin: 55px 0;
  font-family: var(--ko-serif);
  font-size: clamp(86px, 13vw, 190px);
  font-weight: 400;
  line-height: 0.8;
  letter-spacing: -0.06em;
  text-align: center;
}

.lecture-intro h1 em {
  color: var(--on-dark);
  font-weight: 400;
}

.lecture-description {
  grid-column: 2;
  max-width: 450px;
  margin: 0;
  color: var(--dark-muted);
  font-size: 15px;
}

.video-section {
  padding: 0 clamp(22px, 4vw, 64px) 130px;
}

.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #000;
  border: 1px solid var(--dark-line);
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.local-video-notice {
  position: absolute;
  inset: 0;
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: #111;
}

.local-video-notice[hidden] {
  display: none;
}

.local-video-notice p {
  margin: 0 0 12px;
  font-family: var(--ko-serif);
  font-size: clamp(26px, 3vw, 45px);
}

.local-video-notice span {
  color: var(--dark-muted);
  font-size: 13px;
}

.local-video-notice a {
  margin-top: 30px;
  padding-bottom: 4px;
  border-bottom: 1px solid currentColor;
  color: var(--on-dark);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
}

.video-footer {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--dark-line);
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.video-footer p {
  margin: 0;
  color: var(--dark-muted);
}

.video-footer a span {
  display: inline-block;
  margin-left: 8px;
  transition: transform 180ms ease;
}

.video-footer a:hover span,
.video-footer a:focus-visible span {
  transform: translate(3px, -3px);
}

@media (max-width: 760px) {
  .lecture-intro {
    min-height: 480px;
    grid-template-columns: 1fr;
  }

  .lecture-intro h1 {
    font-size: 25vw;
  }

  .lecture-description {
    grid-column: 1;
    max-width: 320px;
  }

  .video-section {
    padding-bottom: 90px;
  }

  .video-footer {
    gap: 24px;
    flex-direction: column;
  }
}