/* ==========================================================================
   flip-card: one slice of a panorama photo on the front, details on the back
   (from template "Transmit"). Used in Membership.
   Mobile/tablet: tap to flip. Desktop: flipped by scroll (js/modules/membership.js)
   ========================================================================== */

.flip-card {
  position: relative;
  aspect-ratio: 4 / 3;
  perspective: 1200px;
}

.flip-card__toggle {
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: var(--radius-md);
}

.flip-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-md);
  transform-style: preserve-3d;
  transition: transform 800ms var(--ease-in-out);
}

.flip-card--flipped .flip-card__inner {
  transform: rotateY(180deg);
}

.flip-card__front,
.flip-card__back {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: inherit;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.flip-card__front {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 1.25rem;
  color: var(--color-ivory);
  background-color: var(--color-petrol);
  background-image:
    linear-gradient(0deg, rgba(0, 28, 30, 0.8) 0%, rgba(0, 28, 30, 0) 55%),
    url("../../assets/img/membership-panorama.webp");
  /* 300% auto: the photo keeps its proportions on any card shape (it is 15:7 = three 5:7 cards) */
  background-size: 100% 100%, 300% auto;
  background-position: center, calc(var(--slice, 0) * 50%) 70%;
}

.flip-card__front-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.1;
}

.flip-card__hint {
  order: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-label);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.75;
}

.flip-card__hint svg {
  width: 1rem;
  height: 1rem;
}

.flip-card__back {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  background-color: var(--color-teal);
  color: var(--color-ivory);
  transform: rotateY(180deg);
}

.flip-card__back--accent {
  background-color: var(--color-copper);
}

.flip-card__back--light {
  background-color: var(--color-sand);
  color: var(--color-teal);
}

.flip-card__index {
  font-family: var(--font-label);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  opacity: 0.6;
}

.flip-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2.1rem);
  line-height: 1.1;
}

.flip-card__info {
  display: grid;
  gap: 1rem;
}

.flip-card__row {
  display: grid;
  gap: 0.2rem;
}

.flip-card__label {
  font-family: var(--font-label);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.6;
}

.flip-card__value {
  font-size: 1rem;
  line-height: 1.4;
}

@media (min-width: 600px) {
  .flip-card {
    aspect-ratio: 5 / 7;
  }
}

/* Desktop: the panorama is driven by scroll, no tap */
@media (min-width: 1000px) {
  .flip-card {
    aspect-ratio: 5 / 7;
  }

  .flip-card__toggle,
  .flip-card__hint,
  .flip-card__front-name {
    display: none;
  }

  .flip-card__inner {
    transition: none;
    transform-origin: 50% 0;
  }

  .membership__card:nth-child(1) .flip-card__inner { border-radius: var(--radius-md) 0 0 var(--radius-md); }
  .membership__card:nth-child(2) .flip-card__inner { border-radius: 0; }
  .membership__card:nth-child(3) .flip-card__inner { border-radius: 0 var(--radius-md) var(--radius-md) 0; }

  .flip-card__front {
    background-image: url("../../assets/img/membership-panorama.webp");
    background-size: 300% auto;
    background-position: calc(var(--slice, 0) * 50%) center;
  }

  .flip-card__back {
    padding: 2rem;
  }
}