/* ================= General Layout ================= */
main {
  margin-top: 80px; /* Proper space after navbar */
}

/* ================= Projects Section ================= */
.projects-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--neutral-300) 25%, var(--neutral-600) 75%);
  position: relative;
  overflow: hidden;
}

.projects-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(72, 118, 255, 0.05) 0%, rgba(255, 255, 255, 0) 70%);
  z-index: 0;
}

.projects-section .container {
  position: relative;
  z-index: 1;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-title {
  font-size: clamp(2.2rem, 4vw, 3rem);
  color: var(--primary);
  margin-bottom: 20px;
  font-weight: 700;
}

.section-divider {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin: 0 auto;
  border-radius: 2px;
}

/* ================= Case Study Cards ================= */
.case-study {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  margin-bottom: 80px;
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--neutral-200);
  position: relative;
}

.case-study:hover {
  transform: translateY(-8px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

/* Case Study Header */
.case-study-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 40px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: white;
  position: relative;
}

.case-study-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.1;
}

.case-study-meta {
  flex: 1;
  position: relative;
  z-index: 1;
}

.case-study-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: 8px 20px;
  border-radius: 25px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 15px;
  letter-spacing: 0.5px;
  backdrop-filter: blur(10px);
}

.case-study-header h3 {
  font-size: 2.2rem;
  margin: 0 0 12px 0;
  color: white;
  font-weight: 700;
  line-height: 1.2;
}

.case-study-role {
  margin: 0;
  opacity: 0.9;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.case-study-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: 30px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
  font-size: 1rem;
  backdrop-filter: blur(10px);
  position: relative;
  z-index: 1;
}

.case-study-link:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

/* Case Study Image */
.case-study-image {
  overflow: hidden;
  border-bottom: 1px solid var(--neutral-200);
}

.case-study-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.7s ease;
}

.case-study:hover .case-study-image img {
  transform: scale(1.03);
}

/* Case Study Content */
.case-study-content {
  padding: 50px;
}

.content-section {
  margin-bottom: 50px;
}

.content-section:last-child {
  margin-bottom: 0;
}

.case-study-content h4 {
  color: var(--primary);
  font-size: 1.5rem;
  margin: 0 0 25px 0;
  display: flex;
  align-items: center;
  gap: 15px;
  font-weight: 600;
}

.case-study-content h4 i {
  color: var(--accent);
  font-size: 1.3em;
}

.case-study-content p {
  color: var(--neutral-700);
  line-height: 1.8;
  font-size: 1.1rem;
  margin-bottom: 0;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  margin: 30px 0;
}

.feature-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--neutral-50);
  padding: 30px;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  background: white;
}

.feature-item i {
  color: var(--primary);
  font-size: 2rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.feature-item h5 {
  margin: 0 0 15px 0;
  color: var(--primary);
  font-size: 1.3rem;
  font-weight: 600;
}

.feature-item p {
  margin: 0;
  font-size: 1.05rem;
  color: var(--neutral-600);
  line-height: 1.6;
}

/* Technologies Grid */
.technologies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  margin-top: 25px;
}

.technology-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  background: white;
  padding: 30px 20px;
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
  text-align: center;
  border: 2px solid var(--neutral-200);
}

.technology-item:hover {
  transform: translateY(-8px) scale(1.05);
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  color: white;
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.technology-item:hover i,
.technology-item:hover span {
  color: white;
}

.technology-item i {
  color: var(--primary);
  font-size: 2.5rem;
  transition: var(--transition);
}

.technology-item span {
  font-weight: 600;
  color: var(--neutral-800);
  font-size: 1rem;
  transition: var(--transition);
}

/* Context Grid */
.context-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 30px;
  margin: 30px 0;
}

.context-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--neutral-50);
  padding: 30px;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary);
}

.context-item i {
  color: var(--primary);
  font-size: 2rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.context-item h5 {
  margin: 0 0 15px 0;
  color: var(--primary);
  font-size: 1.3rem;
  font-weight: 600;
}

.context-item p {
  margin: 0;
  color: var(--neutral-600);
  line-height: 1.6;
  font-size: 1.05rem;
}

/* Approach Steps */
.approach-steps {
  display: flex;
  flex-direction: column;
  gap: 30px;
  margin: 30px 0;
}

.approach-step {
  display: flex;
  gap: 30px;
  align-items: flex-start;
}

.step-number {
  background: var(--primary);
  color: white;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
}

.step-content h5 {
  margin: 0 0 15px 0;
  color: var(--primary);
  font-size: 1.3rem;
  font-weight: 600;
}

.step-content p {
  margin: 0;
  color: var(--neutral-600);
  line-height: 1.6;
  font-size: 1.05rem;
}

/* Results Grid */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 30px;
  margin: 30px 0;
}

.quantitative-results,
.qualitative-results {
  background: var(--neutral-50);
  padding: 35px;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary);
}

.quantitative-results h5,
.qualitative-results h5 {
  color: var(--primary);
  font-size: 1.3rem;
  margin: 0 0 25px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.quantitative-results ul,
.qualitative-results ul {
  margin: 0;
  padding-left: 20px;
}

.quantitative-results li,
.qualitative-results li {
  margin-bottom: 15px;
  color: var(--neutral-600);
  line-height: 1.6;
  font-size: 1.05rem;
}

/* Competencies Grid */
.competencies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 25px;
}

.competency-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  background: white;
  padding: 30px 20px;
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
  text-align: center;
  border: 2px solid var(--neutral-200);
}

.competency-item:hover {
  transform: translateY(-8px) scale(1.05);
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  color: white;
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.competency-item:hover i,
.competency-item:hover span {
  color: white;
}

.competency-item i {
  color: var(--primary);
  font-size: 2.2rem;
  transition: var(--transition);
}

.competency-item span {
  font-weight: 600;
  color: var(--neutral-800);
  font-size: 1rem;
  transition: var(--transition);
  line-height: 1.4;
}

/* ================= Responsive Design ================= */
@media (max-width: 1200px) {
  .case-study-header h3 {
    font-size: 2rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

@media (max-width: 992px) {
  .case-study-header {
    flex-direction: column;
    gap: 25px;
    align-items: flex-start;
    padding: 35px;
  }
  
  .case-study-link {
    align-self: flex-start;
  }
  
  .case-study-content {
    padding: 40px;
  }
  
  .technologies-grid,
  .competencies-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .projects-section {
    padding: 60px 0;
  }
  
  .section-header {
    margin-bottom: 60px;
  }
  
  .case-study {
    margin-bottom: 60px;
  }
  
  .case-study-content {
    padding: 30px;
  }
  
  .case-study-header {
    padding: 30px;
  }
  
  .case-study-header h3 {
    font-size: 1.8rem;
  }
  
  .content-section {
    margin-bottom: 40px;
  }
  
  .features-grid,
  .context-grid,
  .results-grid {
    grid-template-columns: 1fr;
  }
  
  .technologies-grid,
  .competencies-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }
  
  .approach-step {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }
  
  .step-number {
    align-self: center;
  }
}

@media (max-width: 640px) {
  .projects-section {
    padding: 40px 0;
  }
  
  .section-header {
    margin-bottom: 50px;
  }
  
  .case-study-content {
    padding: 25px;
  }
  
  .case-study-header {
    padding: 25px;
  }
  
  .case-study-header h3 {
    font-size: 1.6rem;
  }
  
  .case-study-content h4 {
    font-size: 1.3rem;
  }
  
  .feature-item {
    flex-direction: column;
    text-align: center;
    gap: 15px;
    padding: 25px;
  }
  
  .technologies-grid,
  .competencies-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .technology-item,
  .competency-item {
    padding: 25px 15px;
  }
}

@media (max-width: 480px) {
  .case-study-header h3 {
    font-size: 1.4rem;
  }
  
  .case-study-content h4 {
    font-size: 1.2rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  
  .case-study-content p {
    font-size: 1rem;
  }
  
  .feature-item {
    padding: 20px;
  }
  
  .context-item {
    flex-direction: column;
    text-align: center;
    gap: 15px;
    padding: 25px;
  }
  
  .technologies-grid,
  .competencies-grid {
    grid-template-columns: 1fr;
  }
}