:root {
  color-scheme: dark;
  --bg: #0b0b14;
  --ink: #f2f2f7;
  --accent: #7CFC9A;
  --card-ratio: 198 / 270;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(-45deg, #7a1fd6, #0b0b14, #39d97a, #0b0b14, #7a1fd6);
  background-size: 400% 400%;
  animation: gradientWave 18s ease-in-out infinite;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@keyframes gradientWave {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@media (prefers-reduced-motion: reduce) {
  body {
    animation: none;
  }
}

.site-header {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  font-weight: 900;
  letter-spacing: 0.03em;
  font-style: italic;
  background: linear-gradient(90deg, #7CFC9A, #d9a8ff, #7CFC9A);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 40px rgba(124, 252, 154, 0.35);
  animation: titleShine 6s linear infinite;
}

@keyframes titleShine {
  to {
    background-position: -200% center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header h1 {
    animation: none;
  }
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.card {
  aspect-ratio: var(--card-ratio);
  perspective: 1200px;
  cursor: pointer;
  border-radius: 12px;
}

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

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
  transform-style: preserve-3d;
}

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

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
}

.card-face img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-back {
  transform: rotateY(180deg);
}

@media (hover: hover) {
  .card:hover .card-inner {
    transform: translateY(-4px);
  }

  .card.flipped:hover .card-inner {
    transform: rotateY(180deg) translateY(-4px);
  }
}