/* Почему Sansara — feature flip cards with images */

#advantages .section__header .section-subtitle {
  display: block;
  max-width: min(640px, 100%);
  margin: var(--space-3) auto clamp(24px, 4vw, 42px);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

#advantages .features-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(18px, 2vw, 28px);
  align-items: center;
  padding-block: var(--space-2) var(--space-6);
}

#advantages .flip-card.feature-card {
  --card-rotate: 0deg;
  --card-offset-y: 0px;
  --float-delay: 0s;
  perspective: 1100px;
  min-height: 0;
  transform: translateY(var(--card-offset-y)) rotate(var(--card-rotate));
  transition: filter var(--duration-normal) var(--ease-out);
  cursor: pointer;
  outline: none;
}

#advantages .feature-card:nth-child(1) {
  --card-rotate: -2deg;
  --card-offset-y: 10px;
  --float-delay: 0s;
}

#advantages .feature-card:nth-child(2) {
  --card-rotate: 1.5deg;
  --card-offset-y: -14px;
  --float-delay: -1.4s;
}

#advantages .feature-card:nth-child(3) {
  --card-rotate: -1deg;
  --card-offset-y: 18px;
  --float-delay: -2.6s;
}

#advantages .feature-card:nth-child(4) {
  --card-rotate: 2deg;
  --card-offset-y: -8px;
  --float-delay: -3.8s;
}

#advantages .flip-card__float {
  animation: featureFloat 5.8s ease-in-out infinite;
  animation-delay: var(--float-delay);
}

@keyframes featureFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

#advantages .flip-card__inner {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  min-height: 260px;
  max-height: 380px;
  transition: transform 0.65s var(--ease-out);
  transform-style: preserve-3d;
}

#advantages .flip-card__face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(233, 193, 86, 0.28);
  overflow: hidden;
  transition:
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

#advantages .flip-card__face--front {
  display: block;
  padding: 0;
  background: var(--color-bg-panel);
}

#advantages .feature-card__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

#advantages .feature-card__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.55) 55%, rgba(0, 0, 0, 0.82) 100%),
    radial-gradient(ellipse 90% 60% at 50% 35%, rgba(245, 162, 15, 0.1), rgba(0, 0, 0, 0.45));
  pointer-events: none;
}

#advantages .feature-card__front-content {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-4) var(--space-6);
  text-align: center;
}

#advantages .feature-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: normal;
  color: var(--color-text);
  line-height: 1.2;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.65);
}

#advantages .flip-card__hint {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  letter-spacing: 0.03em;
}

#advantages .feature-card__flip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  margin-top: var(--space-1);
  font-size: 1rem;
  color: var(--color-accent-soft);
  border: 1px solid rgba(233, 193, 86, 0.35);
  border-radius: 50%;
  background: rgba(11, 9, 8, 0.45);
}

#advantages .flip-card__face--back.feature-card__back {
  --card-radius: var(--radius-lg);
  display: block;
  padding: 0;
  transform: rotateY(180deg);
  background:
    radial-gradient(circle at 50% 0%, rgba(245, 162, 15, 0.14), transparent 42%),
    radial-gradient(circle at 20% 90%, rgba(112, 54, 246, 0.12), transparent 46%),
    rgba(13, 11, 9, 0.92);
  border: 1px solid rgba(233, 193, 86, 0.28);
  box-shadow:
    inset 0 0 36px rgba(245, 162, 15, 0.06),
    0 20px 70px rgba(0, 0, 0, 0.38);
}

#advantages .feature-card__back::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(233, 193, 86, 0.18);
  border-radius: calc(var(--card-radius) - 8px);
  pointer-events: none;
  opacity: 0.9;
  z-index: 1;
}

#advantages .feature-card__back::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 0 42%, rgba(245, 162, 15, 0.06) 50%, transparent 58%),
    radial-gradient(circle at 50% 50%, transparent 0 46%, rgba(233, 193, 86, 0.05) 47%, transparent 49%);
  pointer-events: none;
  opacity: 0.7;
  z-index: 1;
}

#advantages .feature-card__back-glow {
  position: absolute;
  inset: -20% -10%;
  background: radial-gradient(ellipse 70% 50% at 50% 20%, rgba(245, 162, 15, 0.12), transparent 65%);
  pointer-events: none;
  z-index: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

#advantages .feature-card__back-inner {
  position: relative;
  z-index: 2;
  min-height: 100%;
  display: grid;
  place-items: center;
  justify-content: center;
  align-content: center;
  gap: 12px;
  padding: clamp(24px, 3.2vw, 36px);
  text-align: center;
}

#advantages .feature-card__back-icon {
  inline-size: 46px;
  block-size: 46px;
  display: grid;
  place-items: center;
  margin-inline: auto;
  border-radius: 999px;
  border: 1px solid rgba(233, 193, 86, 0.34);
  background:
    radial-gradient(circle, rgba(245, 162, 15, 0.18), rgba(16, 12, 8, 0.64));
  color: var(--color-accent);
  font-size: 1.25rem;
  line-height: 1;
  box-shadow:
    0 0 24px rgba(245, 162, 15, 0.18),
    inset 0 0 18px rgba(245, 162, 15, 0.08);
  transition:
    box-shadow var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out);
}

#advantages .feature-card__back-kicker {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(233, 193, 86, 0.72);
}

#advantages .feature-card__back-title {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.8vw, 1.5rem);
  font-weight: normal;
  line-height: 1.12;
  letter-spacing: 0.02em;
  text-shadow:
    0 0 18px rgba(245, 162, 15, 0.12),
    0 2px 10px rgba(0, 0, 0, 0.5);
}

#advantages .feature-card__back-divider {
  inline-size: min(118px, 58%);
  block-size: 1px;
  position: relative;
  margin-block: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(233, 193, 86, 0.42),
    transparent
  );
  transition: opacity var(--duration-normal) var(--ease-out);
}

#advantages .feature-card__back-divider::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  inline-size: 6px;
  block-size: 6px;
  transform: translate(-50%, -50%) rotate(45deg);
  border: 1px solid rgba(233, 193, 86, 0.72);
  background: rgba(245, 162, 15, 0.28);
}

#advantages .feature-card__back-text {
  max-width: 24ch;
  margin: 0;
  color: rgba(236, 228, 211, 0.82);
  font-size: clamp(0.88rem, 1.1vw, 0.98rem);
  line-height: 1.58;
}

#advantages .flip-card:hover .feature-card__back,
#advantages .flip-card.is-flipped .feature-card__back {
  border-color: rgba(233, 193, 86, 0.38);
  box-shadow:
    inset 0 0 44px rgba(245, 162, 15, 0.09),
    0 20px 70px rgba(0, 0, 0, 0.38);
}

#advantages .flip-card:hover .feature-card__back-glow,
#advantages .flip-card.is-flipped .feature-card__back-glow {
  opacity: 1;
  filter: brightness(1.12);
}

#advantages .flip-card:hover .feature-card__back-icon,
#advantages .flip-card.is-flipped .feature-card__back-icon {
  border-color: rgba(233, 193, 86, 0.48);
  box-shadow:
    0 0 34px rgba(245, 162, 15, 0.28),
    inset 0 0 22px rgba(245, 162, 15, 0.12);
}

#advantages .flip-card:hover .feature-card__back-divider,
#advantages .flip-card.is-flipped .feature-card__back-divider {
  background: linear-gradient(
    90deg,
    transparent,
    rgba(233, 193, 86, 0.58),
    transparent
  );
}

#advantages .flip-card:hover,
#advantages .flip-card:focus-visible {
  z-index: 4;
  filter: drop-shadow(0 12px 28px rgba(0, 0, 0, 0.45));
}

#advantages .flip-card:hover .flip-card__face--front,
#advantages .flip-card:focus-visible .flip-card__face--front {
  border-color: var(--color-gold-border);
  box-shadow: var(--shadow-glow);
}

#advantages .flip-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

@media (max-width: 1023px) {
  #advantages .features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
  }

  #advantages .feature-card:nth-child(1) {
    --card-rotate: -1deg;
    --card-offset-y: 6px;
  }

  #advantages .feature-card:nth-child(2) {
    --card-rotate: 1deg;
    --card-offset-y: -8px;
  }

  #advantages .feature-card:nth-child(3) {
    --card-rotate: -0.75deg;
    --card-offset-y: 10px;
  }

  #advantages .feature-card:nth-child(4) {
    --card-rotate: 1.25deg;
    --card-offset-y: -4px;
  }

  #advantages .flip-card__inner {
    min-height: 240px;
  }
}

@media (max-width: 767px) {
  #advantages .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    padding-block: 0;
  }

  #advantages .feature-card {
    --card-rotate: 0deg !important;
    --card-offset-y: 0px !important;
  }

  #advantages .flip-card__float {
    animation-duration: 7s;
  }

  #advantages .flip-card__inner {
    aspect-ratio: 4 / 3;
    min-height: 220px;
    max-height: none;
  }
}

@media (max-width: 380px) {
  #advantages .feature-card__back-inner {
    gap: 10px;
    padding: clamp(18px, 4vw, 28px);
  }

  #advantages .feature-card__back-kicker {
    font-size: 0.62rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  #advantages .flip-card__float {
    animation: none !important;
  }

  #advantages .feature-card {
    transform: translateY(0) rotate(0) !important;
  }
}