/* =====================================================
   PAGE CHƯƠNG TRÌNH HỘI NGHỊ — page-cthn.css
   ===================================================== */

/* =====================================================
   SECTION: CHƯƠNG TRÌNH KHOA HỌC CHI TIẾT
   ===================================================== */
.cthn-schedule {
  background: #fff;
  padding: 64px 0;
  width: 100%;
}

.cthn-schedule__container {
  max-width: 1466px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

/* Heading */
.cthn-schedule__heading-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  align-self: stretch;
  padding-bottom: 16px;
}

.cthn-schedule__title {
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 31.2px;
  text-transform: uppercase;
  color: #013467;
  margin: 0 0 16px;
  text-align: center;
  align-self: stretch;
}

.cthn-schedule__subtitle {
  font-family: "Montserrat", sans-serif;
  font-weight: 500;
  font-size: 1rem;
  line-height: 25.6px;
  color: #565e71;
  text-align: center;
  margin: 0;
}

/* =====================================================
   TABS NAVIGATION
   ===================================================== */
.cthn-tabs {
  display: flex;
  flex-direction: row;
  justify-content: center;
  padding: 4px;
  background: #fff;
  border: 1px solid #c3c6d1;
  border-radius: 4px;
  box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.05);
  gap: 0;
}

.cthn-tab {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 12px 32px;
  border-radius: 4px;
  cursor: pointer;
  border: none;
  background: transparent;
  font-family: "Montserrat", sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 24px;
  text-align: center;
  color: #000;
  transition:
    background 0.22s ease,
    color 0.22s ease;
  min-width: 260px;
}

.cthn-tab__shadow {
  position: absolute;
  inset: 0;
  border-radius: 4px;
  background: transparent;
  box-shadow:
    0px 2px 4px -2px rgba(0, 0, 0, 0.1),
    0px 4px 6px -1px rgba(0, 0, 0, 0.1);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.22s ease;
}

.cthn-tab--active {
  background: #003366;
  color: #fff;
}

.cthn-tab--active .cthn-tab__shadow {
  opacity: 1;
}

.cthn-tab--active .cthn-tab__day {
  font-weight: 700;
}

.cthn-tab__day {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  line-height: 24px;
}

.cthn-tab__location {
  display: block;
  font-weight: 400;
  font-size: 14px;
  line-height: 21px;
  opacity: 0.85;
}

/* =====================================================
   BỘ LỌC HỘI TRƯỜNG (Hall Filters)
   ===================================================== */
.cthn-hall-filters {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  gap: 12px;
  margin-bottom: 8px;
}

.cthn-hall-btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 10px 24px;
  font-family: "Montserrat", sans-serif;
  border-radius: 5px;
  cursor: pointer;
  background: #003366;
  height: 60px;
  font-weight: 600;
  color: #fff;
  transition: all 0.2s ease;
  box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.05);
  border: none;
}

.cthn-hall-btn:hover {
  background: #ef2f3c;
}

.cthn-hall-btn--active {
  background: #ef2f3c;
  color: #fff;
  border-color: #ef2f3c;
  box-shadow: 0px 2px 4px rgba(239, 47, 60, 0.2);
}

/* Ẩn các phiên không tương thích khi lọc */
.cthn-session--hidden {
  display: none !important;
}

/* =====================================================
   SESSION LIST
   ===================================================== */
.cthn-session-list {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  align-self: stretch;
  gap: 20px;
}

/* Session card */
.cthn-session {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  align-self: stretch;
  background: #fff;
  border: 1px solid #c3c6d1;
  border-radius: 10px;
  overflow: hidden;
}

/* Time column */
.cthn-session__time-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 350px;
  min-width: 350px;
  padding: 0 15px;
  background: #f2f4f7;
  border-right: 1px solid #c3c6d1;
  flex-shrink: 0;
}

.cthn-session__time {
  font-family: "Montserrat", sans-serif;
  font-weight: 600;
  font-size: 1.125rem;
  line-height: 27px;
  color: #013467;
  text-align: center;
}

/* Content column */
.cthn-session__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-self: stretch;
  flex: 1;
  padding: 10px 24px;
  min-width: 0;
}

/* Badge (phiên label) */
.cthn-session__badge-wrap {
  margin-bottom: 8px;
}

.cthn-session__badge {
  display: inline-block;
  background: #ef2f3c;
  border-radius: 4px;
  padding: 2px 8px;
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
  font-size: 10px;
  line-height: 15px;
  text-transform: uppercase;
  color: #fff;
}

/* Title */
.cthn-session__title {
  font-family: "Montserrat", sans-serif;
  font-weight: 600;
  font-size: 1rem;
  line-height: 30px;
  color: #191c1e;
  margin: 0;
}

p.cthn-session__speaker {
  margin: 0;
  font-size: 14px;
  font-style: italic;
  color: var(--primary-color);
}

/* Break sessions (giải lao / gala) */
.cthn-session--break .cthn-session__content {
  justify-content: center;
}

/* =====================================================
   DOWNLOAD BUTTON
   ===================================================== */
.cthn-download-wrap {
  display: flex;
  justify-content: center;
  align-self: stretch;
  padding-top: 16px;
}

.cthn-download-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #001e40;
  border-radius: 4px;
  padding: 12px 32px;
  font-family: "Montserrat", sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 24px;
  color: #fff;
  text-decoration: none;
  box-shadow:
    0 2px 4px -2px rgba(0, 0, 0, 0.1),
    0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transition:
    background 0.22s ease,
    box-shadow 0.22s ease,
    transform 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

.cthn-download-btn:hover {
  background: #013467;
  color: #fff;
  box-shadow:
    0 4px 8px -2px rgba(0, 0, 0, 0.15),
    0 8px 12px -2px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
  text-decoration: none;
}

.cthn-download-btn:active {
  transform: translateY(0);
}

.cthn-download-btn__icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* =====================================================
   TAB PANELS
   ===================================================== */
.cthn-panel {
  display: none;
  flex-direction: column;
  align-self: stretch;
  gap: 20px;
  width: 100%;
}

.cthn-panel--active {
  display: flex;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 1200px) {
  .cthn-session__time-col {
    width: 200px;
    min-width: 200px;
  }

  .cthn-hall-label {
    width: 140px;
    min-width: 140px;
    font-size: 14px;
  }
}

@media (max-width: 900px) {
  .cthn-tabs {
    flex-direction: column;
    width: 100%;
  }

  .cthn-tab {
    min-width: unset;
    width: 100%;
  }

  .cthn-hall-filters {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding: 8px 4px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
  }

  .cthn-hall-filters::-webkit-scrollbar {
    display: none; /* Safari and Chrome */
  }

  .cthn-hall-btn {
    flex-shrink: 0;
    padding: 8px 16px;
    font-size: 13px;
  }

  .cthn-session {
    flex-direction: column;
  }

  .cthn-session__time-col {
    width: auto;
    min-width: unset;
    padding: 12px 16px;
    border-right: none;
    border-bottom: 1px solid #c3c6d1;
  }

  .cthn-session__content {
    padding: 12px 16px;
  }
}

@media (max-width: 640px) {
  .cthn-hall-btn {
    height: 45px;
  }
  .cthn-schedule {
    padding: 40px 0;
  }

  .cthn-schedule__container {
    padding: 0 16px;
    gap: 20px;
  }

  .cthn-schedule__title {
    font-size: 20px;
  }

  .cthn-session__time {
    font-size: 1rem;
  }

  .cthn-session__title {
    font-size: 1rem;
    line-height: 26px;
  }
}

/* =====================================================
   BOX VIDEO YOUTUBE THEO HỘI TRƯỜNG
   ===================================================== */
.cthn-hall-videos {
  display: none;
  width: 100%;
  max-width: 800px;
  margin: 16px auto 32px;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0px 4px 20px rgba(0, 0, 0, 0.15);
}

.cthn-hall-videos--visible {
  display: block;
}

.cthn-hall-video {
  display: none;
  width: 100%;
}

.cthn-hall-video--active {
  display: block;
}

.cthn-video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* Tỷ lệ khung hình 16:9 */
  height: 0;
}

.cthn-video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* =====================================================
   REDUCED MOTION
   ===================================================== */
@media (prefers-reduced-motion: reduce) {
  .cthn-download-btn,
  .cthn-tab {
    transition: none;
  }
}