/* ================================
   CARDS & GRIDS STYLES
   ================================ */

/* === GRID LAYOUTS === */
.experience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px; /* Increased gap for better spacing during flip */
  margin-bottom: 30px;
  position: relative; /* Ensure proper positioning context */
  overflow: visible; /* Allow cards to extend outside grid bounds when flipping */
}

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
  /* Parallax scroll-driven animation */
  view-timeline-name: --achieve-parallax;
  view-timeline-axis: block;
  animation-name: parallaxDepthCard;
  animation-timeline: --achieve-parallax;
  animation-range: entry 0% cover 80%;
  animation-fill-mode: both;
  --parallax-depth: 0px;
  transform: translateY(var(--parallax-depth));
}

.tech-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

/* === MODULE FLIP CARDS === */
.module-flip-card {
  background: transparent;
  width: 100%;
  height: 280px;
  perspective: 1000px;
  cursor: pointer;
  position: relative;
  z-index: 1;
  transition: z-index 0s linear 0.4s; /* Delay z-index reset */
  transform-style: preserve-3d;
  overflow: visible; /* Allow 3D transformed elements to extend */
}

.module-flip-card:hover {
  z-index: 10; /* Bring to front on hover */
  transition: z-index 0s linear 0s; /* Immediate z-index increase */
}

.module-flip-card-inner {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  text-align: left;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  transform-style: preserve-3d;
  transform-origin: center center;
  backface-visibility: hidden; /* Improve performance */
}

.module-flip-card:hover .module-flip-card-inner {
  transform: rotateY(180deg);
}

.module-flip-card-front,
.module-flip-card-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  background: var(--card-bg);
  border-radius: 20px;
  padding: 30px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  transform-style: preserve-3d;
  will-change: transform; /* Optimize for transforms */
}

.module-flip-card:hover .module-flip-card-front,
.module-flip-card:hover .module-flip-card-back {
  box-shadow: 0 15px 50px rgba(139, 92, 246, 0.25);
}

.module-flip-card-front {
  transform: rotateY(0deg);
}

.module-flip-card-front::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(139, 92, 246, 0.1) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  border-radius: 20px;
}

.module-flip-card:hover .module-flip-card-front::before {
  opacity: 1;
}

.module-flip-card-back {
  background: linear-gradient(
    135deg,
    rgba(139, 92, 246, 0.1) 0%,
    rgba(59, 130, 246, 0.05) 100%
  );
  transform: rotateY(180deg);
  border: 1px solid rgba(139, 92, 246, 0.2);
}

.module-flip-card-back h4 {
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 15px;
  text-align: center;
}

.module-topics {
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
}

.module-topics li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 6px 0;
  padding-left: 15px;
  position: relative;
  transition: color 0.2s ease;
}

.module-topics li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #22c55e;
  font-weight: bold;
}

.module-topics.upcoming li::before {
  content: "→";
  color: #f59e0b;
}

.module-topics li:hover {
  color: var(--text-primary);
}

.module-action {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 12px 20px;
  border-radius: 10px;
  text-align: center;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  cursor: pointer;
  margin-top: 15px;
}

.module-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.3);
}

.module-action.upcoming {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.module-action.upcoming:hover {
  box-shadow: 0 8px 25px rgba(245, 158, 11, 0.3);
}

.hover-hint {
  position: absolute;
  bottom: 15px;
  right: 20px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.7;
  transition: all 0.3s ease;
}

.module-flip-card:hover .hover-hint {
  opacity: 0;
  transform: translateX(10px);
}

.module-header {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
}

.module-icon {
  font-size: 2rem;
  margin-right: 15px;
}

.module-title {
  color: var(--text-primary);
  font-size: 1.3rem;
  font-weight: 600;
}

.module-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* === EXPERIENCE CARDS === */
.experience-card {
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.15) 0%,
    rgba(139, 92, 246, 0.1) 100%
  );
  padding: 25px;
  border-radius: 16px;
  border-left: 4px solid var(--secondary-color);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  transform-origin: center;
}

.experience-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(59, 130, 246, 0.2) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.experience-card:hover {
  transform: translateY(-8px) rotateX(3deg) scale(1.05);
  box-shadow: 0 20px 40px rgba(59, 130, 246, 0.25),
    0 0 0 1px rgba(59, 130, 246, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border-left-color: var(--accent-color);
}

.experience-card:hover::before {
  opacity: 1;
}

.experience-card:active {
  transform: translateY(-4px) rotateX(1deg) scale(1.02);
  transition: all 0.1s ease;
}

.experience-card h3 {
  color: var(--text-primary);
  margin-bottom: 10px;
}

/* === ACHIEVEMENT CARDS === */
.achievement {
  text-align: center;
  padding: 25px;
  border-radius: 16px;
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.1) 0%,
    rgba(139, 92, 246, 0.05) 100%
  );
  border: 2px dashed var(--secondary-color);
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
}

.achievement::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(139, 92, 246, 0.15) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.achievement:hover {
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.2) 0%,
    rgba(139, 92, 246, 0.15) 100%
  );
  box-shadow: 0 15px 35px var(--shadow-medium);
  transform: translateY(-8px) rotateX(5deg) scale(1.05);
  border-color: var(--accent-color);
  border-style: solid;
}

.achievement:hover::before {
  opacity: 1;
}

.achievement-unlocked {
  text-align: center;
  padding: 25px;
  border-radius: 16px;
  background: linear-gradient(
    135deg,
    rgba(16, 185, 129, 0.15) 0%,
    rgba(59, 130, 246, 0.1) 100%
  );
  border: 2px solid var(--success);
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
}

.achievement-unlocked::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(16, 185, 129, 0.2) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.achievement-unlocked:hover {
  background: linear-gradient(
    135deg,
    rgba(16, 185, 129, 0.25) 0%,
    rgba(59, 130, 246, 0.2) 100%
  );
  box-shadow: 0 20px 40px rgba(16, 185, 129, 0.3);
  transform: translateY(-10px) rotateX(3deg) scale(1.08);
  border-color: rgba(16, 185, 129, 0.8);
}

.achievement-unlocked:hover::before {
  opacity: 1;
}

.achievement-icon {
  font-size: 2rem;
  margin-bottom: 10px;
  opacity: 0.5;
}

/* === TECH CATEGORY CARDS === */
.tech-category {
  padding: 25px;
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.08) 0%,
    rgba(139, 92, 246, 0.05) 100%
  );
  border-radius: 16px;
  border: 1px solid rgba(59, 130, 246, 0.2);
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  transform-origin: center;
}

.tech-category::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(59, 130, 246, 0.15) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.tech-category:hover {
  transform: translateY(-8px) rotateX(5deg) scale(1.02);
  box-shadow: 0 20px 40px rgba(59, 130, 246, 0.3),
    0 0 0 1px rgba(59, 130, 246, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border-color: rgba(59, 130, 246, 0.4);
}

.tech-category:hover::before {
  opacity: 1;
}

.tech-category h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 1.2rem;
}

.tech-category ul {
  list-style: none;
  padding: 0;
}

.tech-category li {
  color: var(--text-secondary);
  margin-bottom: 8px;
  padding-left: 15px;
  position: relative;
}

.tech-category li::before {
  content: "▶";
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

/* === PROGRESS BARS === */
.progress-bar {
  width: 100%;
  height: 10px;
  background: var(--border);
  border-radius: 5px;
  overflow: hidden;
  margin: 15px 0;
}

.progress-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 5px;
  transition: width 0.3s ease;
}

/* === ANIMATIONS === */
@keyframes parallaxDepthCard {
  from {
    opacity: 0.7;
    transform: translateY(calc(var(--parallax-depth) * 1.5));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 768px) {
  .modules-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .experience-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .achievement-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
  }

  .tech-categories {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .module-flip-card {
    height: 260px;
  }

  .module-flip-card-front,
  .module-flip-card-back {
    padding: 20px;
  }

  .module-topics li {
    font-size: 0.85rem;
    padding: 4px 0;
  }

  .module-action {
    padding: 10px 15px;
    font-size: 0.85rem;
  }

  /* Disable flip on mobile for better touch experience */
  .module-flip-card:hover .module-flip-card-inner {
    transform: none;
  }

  /* Enable tap to flip on mobile */
  .module-flip-card:active .module-flip-card-inner {
    transform: rotateY(180deg);
  }

  .experience-card {
    padding: 20px;
  }

  .tech-category {
    padding: 20px;
  }

  .achievement {
    padding: 20px;
  }

  .achievement-unlocked {
    padding: 20px;
  }
}