/* =============================================================================
   Course day
   ========================================================================== */

.courseday__stage {
  position: relative;
  height: clamp(480px, 78svh, 680px);
  overflow: hidden;
  border-radius: var(--b-radius-s);
  background: rgb(var(--c-primary-dark));
  color: rgb(var(--c-neutral-lightest));
}

.courseday__top {
  position: absolute;
  top: 1rem;
  left: 1.25rem;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.courseday .font__tag {
  margin: 0;
  background: rgb(var(--c-neutral-lightest));
  color: rgb(var(--c-primary));
}

.courseday__counter {
  color: rgb(var(--c-neutral-lightest));
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.courseday__items {
  display: flex;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  list-style: none;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}

.courseday__items::-webkit-scrollbar {
  display: none;
}

.courseday__item {
  position: relative;
  display: flex;
  flex: 0 0 100%;
  align-items: flex-end;
  height: 100%;
  margin: 0;
  padding: 4rem 0 calc(var(--courseday-buttons, 2rem) + 2.5rem);
  overflow: hidden;
  background: rgb(var(--c-primary-dark));
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.courseday__item::before {
  display: none;
}

.courseday__item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16, 22, 56, 0.35) 0%, rgba(16, 22, 56, 0.05) 25%, rgba(16, 22, 56, 0.9) 100%);
  pointer-events: none;
}

.courseday__media {
  position: absolute;
  inset: 0;
}

.courseday__media picture,
.courseday__image {
  display: block;
  width: 100%;
  height: 100%;
}

.courseday__image {
  max-width: none;
  object-fit: cover;
}

.courseday__text {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 0 1.25rem;
}

.courseday__time {
  color: rgb(var(--c-accent, 188, 211, 255));
  font-size: clamp(2.4rem, 6vw, 3.5rem);
  font-weight: var(--f-weight-l);
  line-height: 0.9;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.courseday .courseday__title {
  margin: 0;
  color: rgb(var(--c-neutral-lightest));
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  font-weight: var(--f-weight-eb);
  line-height: 0.98;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  text-wrap: balance;
}

.courseday__copy {
  max-width: 560px;
  margin: 0;
  color: rgb(var(--c-neutral-lightest));
  font-size: 1.05rem;
  line-height: 1.5;
}

.courseday__nav {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  z-index: 2;
  display: flex;
  gap: 4px;
}

.courseday__bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
}

.courseday__navbutton {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  padding: 8px 0;
  border: 0;
  border-radius: 0;
  background: none;
  color: rgb(var(--c-neutral-lightest));
  font-weight: var(--f-weight-n);
  text-align: right;
  opacity: 0.45;
  cursor: pointer;
  transition: opacity 0.4s;
}

.courseday__navbutton::after {
  content: '';
  width: 18px;
  height: 3px;
  border-radius: 2px;
  background: rgb(var(--c-neutral-lightest));
  transition: width 0.4s;
}

.courseday__navbutton.-active {
  font-weight: var(--f-weight-b);
  opacity: 1;
}

.courseday__navbutton.-active::after {
  width: 44px;
}

.courseday:not(.-sticky) .courseday__navbutton {
  padding: 12px 0;
}

.courseday:not(.-sticky) .courseday__navbutton::after {
  width: 12px;
}

.courseday:not(.-sticky) .courseday__navbutton.-active::after {
  width: 28px;
}

.courseday:not(.-sticky) .courseday__navlabel {
  display: none;
}

.courseday__fill {
  display: block;
  height: 100%;
  background: rgb(var(--c-neutral-lightest));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}

.courseday__buttons {
  position: absolute;
  left: 1.25rem;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 2;
}

.courseday__buttons p {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
}

/* Sticky scroll mode */

.courseday.-sticky {
  height: calc(100vh + var(--courseday-count) * 22vh);
}

.courseday.-sticky .courseday__stage {
  position: sticky;
  top: var(--courseday-top, 0);
  height: calc(100vh - var(--courseday-top, 0px) - 16px);
}

.courseday.-sticky .courseday__top {
  position: absolute;
  top: calc(var(--gs-inner, 4rem) * 0.7);
  left: var(--gs-inner, 4rem);
  z-index: 2;
}

.courseday.-sticky .courseday__items {
  position: absolute;
  inset: 0;
  display: block;
  overflow: hidden;
}

.courseday.-sticky .courseday__item {
  position: absolute;
  inset: 0;
  align-items: center;
  padding: 5rem 0 6.5rem;
  opacity: 0;
  transition: opacity 1s ease;
}

.courseday.-sticky .courseday__item.-active {
  opacity: 1;
}

.courseday.-sticky .courseday__item::after {
  background: linear-gradient(90deg, rgba(16, 22, 56, 0.88) 0%, rgba(16, 22, 56, 0.55) 45%, rgba(16, 22, 56, 0.1) 100%);
}

.courseday.-sticky .courseday__image {
  transform: scale(1.08);
  transition: transform 6s ease-out;
}

.courseday.-sticky .courseday__item.-active .courseday__image {
  transform: scale(1);
}

.courseday.-sticky .courseday__text {
  gap: min(1.4rem, 2.2vh);
  padding: 0 clamp(14rem, 30vw, 26rem) 0 var(--gs-inner, 4rem);
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.9s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.courseday.-sticky .courseday__item.-past .courseday__text {
  transform: translateY(-40px);
}

.courseday.-sticky .courseday__item.-active .courseday__text {
  opacity: 1;
  transform: none;
}

.courseday.-sticky .courseday__time {
  font-size: clamp(2.6rem, min(7vw, 10vh), 7rem);
}

.courseday.-sticky .courseday__title {
  font-size: clamp(1.9rem, min(5.4vw, 7.5vh), 5.5rem);
}

.courseday.-sticky .courseday__copy {
  font-size: clamp(1.05rem, min(1.6vw, 2.6vh), 1.4rem);
}

.courseday.-sticky .courseday__nav {
  position: absolute;
  top: 50%;
  right: var(--gs-inner, 4rem);
  flex-direction: column;
  gap: 6px;
  transform: translateY(-50%);
}

.courseday.-sticky .courseday__buttons {
  left: var(--gs-inner, 4rem);
  right: auto;
  bottom: calc(var(--gs-inner, 4rem) * 0.7);
}

.courseday__buttons .font__button {
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
  white-space: nowrap;
}

/* =============================================================================
   Media Queries
   ========================================================================== */

@media (hover: hover) {
  .courseday__navbutton:hover {
    opacity: 1;
  }
}

@media (min-width: 640px) {
  .courseday__top {
    top: 1.5rem;
    left: 2rem;
  }

  .courseday__nav {
    top: 1.5rem;
    right: 2rem;
  }

  .courseday__item {
    padding: 5rem 0 calc(var(--courseday-buttons, 2.5rem) + 3rem);
  }

  .courseday__text {
    padding: 0 2rem;
  }

  .courseday__buttons {
    left: 2rem;
    right: 2rem;
    bottom: 1.75rem;
  }

  .courseday__buttons .font__button {
    padding: 0.4rem 1.5rem;
    font-size: 1rem;
  }
}