@import url("https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700&family=Inter:wght@400;600&display=swap");

:root {
  --bg: #0a0c10;
  --card-bg: rgba(20, 25, 35, 0.9);
  --accent: #00f5ff;
  --text: #fafbfd;
  --text-dim: #c6c7cc;
  --radius: 20px;
  --shadow: 0 10px 30px rgba(0, 255, 255, 0.2);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 40px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  width: 100%;
  max-width: 1200px;
}

.card {
  perspective: 1000px;
  cursor: pointer;
  position: relative;
  transform-style: preserve-3d;
}

.card-inner {
  position: relative;
  width: 100%;
  min-height: 360px;
  transform-style: preserve-3d;
  border-radius: var(--radius);
  transition: transform 0.7s cubic-bezier(0.4, 0.2, 0.2, 1);
}

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

.card-face {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: var(--card-bg);
  box-shadow: var(--shadow);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  transition: box-shadow 0.3s, filter 0.3s;
}

.card-face::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  box-shadow: 0 0 12px rgba(0, 255, 255, 0.25),
    0 0 25px rgba(0, 255, 255, 0.15) inset;
  opacity: 0;
  transition: opacity 0.4s;
}

.card:hover .card-face::before,
.card.flipped .card-face::before {
  opacity: 1;
  animation: pulse 2s infinite alternate;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.25),
      0 0 25px rgba(0, 255, 255, 0.15) inset;
  }
  50% {
    box-shadow: 0 0 22px rgba(0, 255, 255, 0.4),
      0 0 35px rgba(0, 255, 255, 0.25) inset;
  }
  100% {
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.25),
      0 0 25px rgba(0, 255, 255, 0.15) inset;
  }
}

.card-front h2 {
  font-family: "Orbitron", sans-serif;
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.card-front p {
  font-size: 1rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.one {
  background: url("https://iili.io/KSTN6ps.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}
.two {
  background: url("https://iili.io/KSTNsjf.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}
.three {
  background: url("https://iili.io/KSTNLQ4.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}
.four {
  background: url("https://iili.io/KST8L1R.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.card-back {
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-back h3 {
  font-family: "Orbitron", sans-serif;
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

ul.features {
  list-style: none;
  padding: 0;
  margin: 0;
}

ul.features li {
  margin-bottom: 0.6rem;
  padding-left: 1.4rem;
  position: relative;
  color: var(--text-dim);
  font-size: 0.95rem;
}

ul.features li::before {
  content: "⚡";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.cta-buttons {
  display: flex;
  gap: 12px;
  margin-top: 1.5rem;
}

.cta-buttons a {
  flex: 1;
  text-align: center;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s;
}

.cta-buttons a.primary {
  background: var(--accent);
  color: #000;
}

.cta-buttons a.primary:hover {
  background: #00ffff;
}

.cta-buttons a.secondary {
  border: 1px solid var(--accent);
  color: var(--accent);
}

.cta-buttons a.secondary:hover {
  background: rgba(0, 255, 255, 0.1);
}

@media (max-width: 768px) {
  body {
    padding: 20px;
  }
  .card-inner {
    min-height: 300px;
  }
  .card-face {
    padding: 18px;
  }
  .card-front h2 {
    font-size: 1.3rem;
  }
  .card-back h3 {
    font-size: 1.2rem;
  }
  ul.features li {
    font-size: 0.9rem;
  }
}