.fade-in-page {
  animation: fadeInPage 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes fadeInPage {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}
.math-grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none; 
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  grid-template-rows: repeat(auto-fill, minmax(40px, 1fr));
  gap: 1px;
  padding: 10px;
  opacity: 0.4;
}
.grid-dot {
  width: 4px;
  height: 4px;
  background-color: var(--text-main);
  border-radius: 50%;
  margin: auto;
  opacity: 0.15;
  transition: transform 0.2s cubic-bezier(0.1, 0.8, 0.2, 1), 
              opacity 0.2s ease, 
              background-color 0.3s ease;
}
[data-theme="dark"] .grid-dot {
  opacity: 0.25;
  background-color: var(--text-main);
}
.projects-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}
.projects-header {
  margin-bottom: 3.5rem;
  text-align: left;
}
.projects-header h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 0.5rem;
}
.projects-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
}
.project-showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}
.project-card {
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.2rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
              border-color 0.3s ease, 
              box-shadow 0.4s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 250px;
}
[data-theme="dark"] .project-card {
  background: rgba(5, 5, 5, 0.6);
}
.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-color);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.04);
}
.project-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}
.project-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}
.project-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap 0.2s ease;
}
.project-card:hover .project-link {
  gap: 0.8rem;
}