.project-card {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
              box-shadow 0.5s ease;
  height: 100%;
  perspective: 1000px;
  transform-style: preserve-3d;
}
.project-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: var(--box-shadow-lg);
}
.project-img {
  position: relative;
  overflow: hidden;
  height: 220px;
}
.project-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.project-card:hover .project-img img {
  transform: scale(1.1);
}
.project-content {
  padding: var(--space-4);
}
.project-content h3 {
  margin-bottom: var(--space-2);
  font-size: var(--font-size-md);
  color: var(--text-color);
  transition: color 0.3s ease;
}
.project-card:hover .project-content h3 {
  color: var(--primary-color);
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--space-3);
}
.tag {
  display: inline-block;
  padding: 4px 10px;
  background-color: rgba(var(--primary-color-rgb), 0.1);
  color: var(--primary-color);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  transition: background-color 0.3s ease, color 0.3s ease;
}
.project-card:hover .tag {
  background-color: rgba(var(--primary-color-rgb), 0.2);
}
.project-content p {
  margin-bottom: var(--space-3);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}
.project-features {
  margin-bottom: var(--space-3);
  background-color: var(--bg-color-alt);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
}
.project-features h4 {
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--text-color);
}
.project-features ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.project-features li {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}
.project-features li i {
  color: var(--primary-color);
  margin-right: 8px;
  font-size: 14px;
}
.project-links {
  display: flex;
  gap: var(--space-2);
}
@media (hover: hover) {
  .project-card {
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
                box-shadow 0.5s ease;
  }
  .project-card.tilt {
    transition: transform 0.1s ease-out;
  }
}
.section-padding {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.section-header {
  margin-bottom: 60px;
  position: relative;
}
.section-line {
  width: 80px;
  height: 3px;
  background-color: var(--primary-color);
  margin: 15px auto 0;
  position: relative;
  overflow: hidden;
}
.section-line::after {
  content: '';
  position: absolute;
  left: -100%;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.3);
  animation: shimmer 2s infinite;
}
@keyframes shimmer {
  100% {
    left: 100%;
  }
}
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-on-scroll.animate-active {
  opacity: 1;
  transform: translateY(0);
}
.skills-grid .skill-item.animate-on-scroll:nth-child(1) { transition-delay: 0.1s; }
.skills-grid .skill-item.animate-on-scroll:nth-child(2) { transition-delay: 0.2s; }
.skills-grid .skill-item.animate-on-scroll:nth-child(3) { transition-delay: 0.3s; }
.skills-grid .skill-item.animate-on-scroll:nth-child(4) { transition-delay: 0.4s; }
.skills-grid .skill-item.animate-on-scroll:nth-child(5) { transition-delay: 0.5s; }
.skills-grid .skill-item.animate-on-scroll:nth-child(6) { transition-delay: 0.6s; }
.skills-grid .skill-item.animate-on-scroll:nth-child(7) { transition-delay: 0.7s; }
.skills-grid .skill-item.animate-on-scroll:nth-child(8) { transition-delay: 0.8s; }
.skills-grid .skill-item.animate-on-scroll:nth-child(9) { transition-delay: 0.9s; }
.projects-grid .project-card.animate-on-scroll:nth-child(1) { transition-delay: 0.1s; }
.projects-grid .project-card.animate-on-scroll:nth-child(2) { transition-delay: 0.3s; }
.projects-grid .project-card.animate-on-scroll:nth-child(3) { transition-delay: 0.5s; }
.certification-card {
  transition: transform 0.3s ease, 
              box-shadow 0.3s ease,
              background-color 0.3s ease;
}
.certification-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-md);
}
.certification-card .certification-icon {
  transition: none;
}
.certification-card:hover .certification-icon {
  transform: none;
}
.achievement-card {
  transition: none;
  box-shadow: var(--box-shadow-md);
  background-color: var(--card-bg);
}
.achievement-card:hover {
  transform: none;
  box-shadow: var(--box-shadow-md);
}
.achievement-card .achievement-icon {
  transition: none;
}
.achievement-card:hover .achievement-icon {
  transform: none;
}
@media screen and (max-width: 768px) {
  .section-padding {
    padding: 70px 0;
  }
  .section-header {
    margin-bottom: 40px;
  }
  .project-img {
    height: 180px;
  }
}