.page-hero {
  width: 100%;
  height: 200px;
  margin-top: 72px;
  background-image: url("../img/step_bg.jpg");
  background-size: cover;
  background-position: center center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-hero__title {
  margin: 0;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(22px, 4vw, 36px);
  letter-spacing: .04em;
  line-height: 1.1;
  color: var(--c-blue-dk);
}

@media (max-width: 720px) {
  .page-hero {
    margin-top: 64px;
  }
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.breadcrumb__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
}

.breadcrumb__item+.breadcrumb__item::before {
  content: "›";
  margin-right: 4px;
  color: var(--ink-mute);
}

.breadcrumb__item a {
  color: var(--c-blue);
  transition: color .2s;
}

.breadcrumb__item a:hover {
  color: var(--c-blue-dk);
}

/* ===== Page Nav ===== */
.page-nav {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  background: var(--bg-tint);
}

.page-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  border: 1.5px solid var(--c-blue);
  font-family: var(--display);
  font-size: 14px;
  font-weight: 500;
  color: var(--c-blue-dk);
  letter-spacing: .04em;
  transition: background .2s, color .2s;
}

.page-nav__link::before {
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  transform: rotate(45deg);
  flex-shrink: 0;
}

.page-nav__link:hover {
  background: var(--c-blue);
  color: #fff;
}

/* ===== Lead ===== */
.conf-lead {
  padding: 64px 0;
}

.conf-lead__text {
  margin: 0 auto;
  font-size: 18px;
  line-height: 2;
  color: var(--ink);
  max-width: 760px;
  text-align: center;
}

@media (max-width: 720px) {
  .conf-lead__text {
    font-size: 16px;
  }
}

/* ===== Lecture sections ===== */
.keynote,
.conf-special,
.conf-general {
  padding: 0 0 80px;
  border-top: 1px solid var(--line);
}

.lecture-heading {
  margin: 64px 0 32px;
  padding-left: 16px;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 26px);
  color: var(--ink);
  border-left: 4px solid var(--c-blue);
}

.conf-special .lecture-heading {
  border-left-color: var(--c-lime);
}

.conf-general .lecture-heading {
  border-left-color: var(--c-yellow);
}

/* --- Card --- */
.lecture-card {
  border: 1px solid var(--line);
  margin-bottom: 48px;
  overflow: hidden;
}

/* --- Title bar --- */
.lecture-header {
  display: flex;
  align-items: stretch;
  background-image: linear-gradient(to right, rgb(32, 156, 255) 0%, rgb(104, 224, 207) 100%);
  color: #fff;
}

.lecture-header__badge {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-blue-dk);
  font-family: var(--en);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .06em;
  padding: 14px 20px;
  min-width: 64px;
  flex-shrink: 0;
}

.lecture-header__title {
  display: flex;
  align-items: center;
  padding: 14px 24px;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(15px, 2vw, 20px);
  letter-spacing: .04em;
  line-height: 1.45;
}

/* --- Body: photo + meta --- */
.lecture-body {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 1px solid var(--line);
}

/* --- Body: two lecturers side by side (widen photo column to keep each photo full-size) --- */
.lecture-body--dual {
  grid-template-columns: 400px 1fr;
}

.lecture-body__photo {
  background: var(--bg-tint);
  overflow: hidden;
  min-height: 200px;
}

.lecture-body__photo img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
}

/* --- Photo: two lecturers side by side --- */
.lecture-body__photo--dual {
  display: flex;
}

.lecture-body__photo--dual img {
  width: 50%;
}

/* --- Meta table --- */
.lecture-meta {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.lecture-meta__row {
  display: grid;
  grid-template-columns: 72px 1fr;
  border-bottom: 1px solid var(--line);
  flex: 1;
}

.lecture-meta__row:last-child {
  border-bottom: 0;
}

.lecture-meta__row dt {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tint);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  font-family: var(--display);
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
  padding: 10px 8px;
  text-align: center;
  letter-spacing: .04em;
}

.lecture-meta__row dd {
  margin: 0;
  padding: 10px 16px;
  font-size: 15px;
  color: var(--ink);
  line-height: 1.6;
  display: flex;
  align-items: center;
}

/* --- Meta: multiple lecturers in one row --- */
.lecture-meta__row dd.lecture-meta__lecturers {
  flex-direction: column;
  align-items: stretch;
  padding: 0;
}

.lecture-meta__lecturer {
  padding: 10px 16px;
}

.lecture-meta__lecturer+.lecture-meta__lecturer {
  border-top: 1px solid var(--line);
}

/* --- Content --- */
.lecture-content {
  padding: 24px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink);
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .lecture-body {
    grid-template-columns: 1fr;
  }

  .lecture-body__photo {
    min-height: 220px;
  }

  .lecture-body__photo img {
    width: auto;
    height: 200px;
    margin: 0 auto;
  }

  /* .lecture-body__photo--dual {
    flex-direction: column;
  } */

  .lecture-body__photo--dual img {
    width: auto;
    height: 200px;
    margin: 0 auto;
  }

  .lecture-header__title {
    padding: 12px 16px;
  }

  .lecture-meta__row dt {
    border-left: none;
  }

  .lecture-meta__row {
    border-top: 1px solid var(--line);
  }

}