/* Root Section */
#projects-certifications {
  padding: 2rem 1rem;
  background-color: var(--bg);
  color: var(--text);
}

/* Titles */
.section-title {
  font-size: 2rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text);
}

.sub-title {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--accent);
}

/* Tabs */
.tab-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.tab-btn {
  background-color: var(--chip-bg);
  color: var(--chip-text);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--chip-shadow);
}

.tab-btn:hover,
.tab-btn.active {
  background-color: var(--primary-color);
  color: #fff;
}

/* Tab Content */
.tab-content {
  display: none;
  animation: fadeIn 0.4s ease-in-out;
}

.tab-content.active {
  display: block;
}

/* Project & Certification Cards Grid */
.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Shared Card Styles */
.project-card,
.expandable-card,
.cert-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.2rem;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  overflow: hidden;
}

.project-card:hover,
.expandable-card:hover,
.cert-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

/* Project Card Layout */
.project-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.project-card h4,
.cert-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--link-color, #0056b3);
}

.project-card p,
.cert-card p {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text);
}

/* Image Styling */
.project-image {
  width: 100%;
  max-height: 200px;
  object-fit: contain;
  border-radius: 8px;
  margin-bottom: 1rem;
  display: block;
}

/* Tech Stack Chips */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
  justify-content: center;
}

.tech-stack span {
  background: var(--chip-bg);
  color: var(--chip-text);
  font-size: 0.8rem;
  padding: 0.3rem 0.6rem;
  border-radius: 5px;
  box-shadow: var(--chip-shadow);
}

/* Tech Icons */
.tech-stack i {
  font-size: 1.3rem;
  margin-right: 0.3rem;
  transition: transform 0.3s ease;
}

.tech-stack i:hover {
  transform: scale(1.25);
}

/* Expandable Project Card */
.project-details {
  display: none;
  margin-top: 0.8rem;
  color: var(--text);
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.expandable-card.active .project-details {
  display: block;
}

/* Certification Card Links */
.cert-card a {
  font-size: 0.9rem;
  color: var(--link-color);
  text-decoration: underline;
}

.cert-card a:hover {
  color: var(--hover-color);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 999;
  padding-top: 5%;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.modal-content {
  background-color: var(--card-bg);
  color: var(--text);
  margin: auto;
  padding: 2rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 90%;
  max-width: 600px;
  box-shadow: var(--card-shadow);
  position: relative;
  animation: fadeInUp 0.4s ease-out;
}

.modal-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.modal-content p {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.modal-content .tech-used {
  margin-top: 1rem;
}

.modal-content .tech-used span {
  display: inline-block;
  background-color: var(--chip-bg);
  color: var(--chip-text);
  padding: 0.4rem 0.75rem;
  margin: 0.2rem;
  border-radius: 20px;
  font-size: 0.85rem;
  box-shadow: var(--chip-shadow);
}

/* Modal Close */
.close {
  color: var(--text);
  position: absolute;
  top: 12px;
  right: 18px;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
  transition: color 0.3s ease;
}

.close:hover {
  color: var(--primary-color);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media screen and (max-width: 768px) {
  .card-container {
    grid-template-columns: 1fr;
  }
}