/* Modern Enhancements */

:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
  
  --primary-color: #667eea;
  --secondary-color: #f093fb;
  --accent-color: #4facfe;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-card: #ffffff;
  
  --border-radius: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Typography Updates */
html, body {
  font-family: 'Sora', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: 400;
  line-height: 1.6;
}

.name-title {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  animation: fadeInUp 0.8s ease-out;
}

.role-subtitle {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 1.25rem;
  margin: 0.25rem 0; /* Tighten spacing between stacked role lines */
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* Profile Image Enhancements */
.profile-image-container {
  display: flex;
  flex-direction: column;
  align-items: center;   /* centers horizontally */
  justify-content: center; /* centers vertically */
  height: 100%;          /* make sure parent has a set height */
}

.profile-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid transparent;
  background: var(--primary-gradient);
  padding: 4px;
  transition: var(--transition);
  animation: profilePulse 2s ease-in-out infinite;
}

.profile-image:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.status-indicator {
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 20px;
  height: 20px;
  background: var(--success-color);
  border-radius: 50%;
  border: 3px solid white;
  animation: pulse 2s infinite;
}

/* Summary Cards */
.summary-container {
  animation: fadeInUp 0.8s ease-out 0.4s both;
  width: 100%;
  overflow: hidden;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  width: 100%;
  box-sizing: border-box;
}

.summary-details {
  margin-top: 1rem;
}

.summary-details details {
  background: var(--bg-card);
  border: 1px solid #e5e7eb;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.summary-details summary {
  cursor: pointer;
  padding: 0.875rem 1rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-secondary);
  list-style: none;
}

.summary-details summary::-webkit-details-marker {
  display: none;
}

.summary-details details[open] summary {
  border-bottom: 1px solid #e5e7eb;
}

.summary-details .summary-list {
  padding: 1rem 1.25rem 1.25rem;
  margin: 0;
  color: var(--text-secondary);
}

.summary-details .summary-list li {
  margin: 0.5rem 0;
}

.summary-card {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid #e5e7eb;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.summary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.summary-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.summary-card:hover::before {
  transform: scaleX(1);
}

.summary-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
}

.summary-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

.detail {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.3;
  margin: 0.5rem 0 0 0rem;
}

.summary-card ul {
  margin: 0.25rem 0 0 1.1rem;
  padding: 0;
  color: var(--text-secondary);
}

.summary-card ul li {
  list-style: disc;
  margin: 0.25rem 0;
}

/* Navigation Enhancements */
#header nav ul li a.nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.nav-icon {
  font-size: 1.1rem;
}

#header nav ul li a.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--primary-gradient);
  transition: var(--transition);
  z-index: -1;
}

#header nav ul li a.nav-link:hover::before {
  left: 0;
}

#header nav ul li a.nav-link:hover {
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Tech Stack Section */
.tech-grid {
  display: grid;
  grid-template-columns: 1fr; /* Always one column across all screen sizes */
  gap: 2rem;
  margin-top: 2rem;
}

.tech-category {
  background: lightgray;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid #e5e7eb;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tech-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.tech-category:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.tech-category:hover::before {
  transform: scaleX(1);
}

.tech-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.tech-icon {
  font-size: 1.5rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tech-tag {
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  border: 2px solid transparent;
  transition: var(--transition);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.tech-tag::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transition: var(--transition);
  z-index: 1;
}

.tech-tag:hover::before {
  left: 0;
}

.tech-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Tech Tag Variants */
.tech-tag.primary {
  background: var(--primary-gradient);
  color: white;
}

.tech-tag.secondary {
  background: var(--secondary-gradient);
  color: white;
}

.tech-tag.accent {
  background: var(--accent-gradient);
  color: white;
}

.tech-tag.database {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
}

.tech-tag.cloud {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  color: white;
}

.tech-tag.ai {
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  color: white;
}

.tech-tag.security {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
}

.tech-tag.blockchain {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
}

/* Experience Timeline */
.experience-timeline {
  position: relative;
  padding-left: 2rem;
}

.experience-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--primary-gradient);
}

.experience-item {
  position: relative;
  margin-bottom: 3rem;
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid #e5e7eb;
  margin-left: 2rem;
  transition: var(--transition);
}

.experience-item::before {
  content: '';
  position: absolute;
  left: -3rem;
  top: 2rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary-color);
  border: 4px solid white;
  box-shadow: var(--shadow-md);
}

.experience-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-xl);
}

.experience-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.experience-period {
  color: var(--text-light);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.experience-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Project Cards */
.project-grid {
  display: grid;
  grid-template-columns: 1fr; /* Always one column across all screen sizes */
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background: lightgrey;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid #e5e7eb;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-category {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--accent-gradient);
  color: white;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

/* Contact Section */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  border: 1px solid #e5e7eb;
  transition: var(--transition);
}

.contact-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.contact-icon {
  font-size: 1.5rem;
  color: var(--primary-color);
}

/* Social Links */
.social-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: white;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}

.social-link:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: var(--shadow-xl);
  background: var(--secondary-gradient);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes profilePulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(102, 126, 234, 0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-light: #9ca3af;
    
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-card: #1f2937;
  }
  
  .summary-card,
  .tech-category,
  .experience-item,
  .project-card,
  .contact-item {
    background: var(--bg-card);
    border-color: #374151;
  }
}

/* Responsive Design */
@media (max-width: 480px) {
  .summary-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin: 1rem 0;
  }
  
  .summary-card {
    margin: 0;
    width: 100%;
    box-sizing: border-box;
  }
}

@media (max-width: 768px) {
  .name-title {
    font-size: 2rem;
  }
  
  .role-subtitle {
    font-size: 1.1rem;
  }
  
  .summary-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .tech-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .project-grid {
    grid-template-columns: 1fr;
  }
  
  .summary-card,
  .tech-category,
  .project-card {
    padding: 1.5rem;
  }
  
  .experience-timeline {
    padding-left: 1rem;
  }
  
  .experience-item {
    margin-left: 1rem;
    padding: 1.5rem;
  }
}

/* Medium screens (tablets/small desktops) */
@media (min-width: 769px) and (max-width: 1279px) {
  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Header nav responsiveness: keep one row on large screens, stack on small */
#header nav ul {
  flex-wrap: nowrap; /* ensure single row on larger screens */
}

@media (max-width: 768px) {
  #header nav ul {
    flex-direction: column; /* one column, five rows */
    min-width: 0;
    width: 100%;
  }
  #header nav ul li {
    border-left: 0;
    border-top: solid 1px #ffffff;
  }
  #header nav ul li:first-child {
    border-top: 0;
  }
  #header nav ul li a {
    width: 100%;
    min-width: 0;
    height: 3rem;
    line-height: 3rem;
  }
}

/* Large screens (desktop/ultrawide) */
@media (min-width: 1280px) {
  .name-title {
    font-size: 3rem;
  }
  .role-subtitle {
    font-size: 1.35rem;
  }
  .summary-grid {
  grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1536px) {
  .name-title {
    font-size: 3.25rem;
  }
  .summary-grid {
    gap: 2rem;
  }
}

/* Print Styles */
@media print {
  .tech-tag,
  .summary-card,
  .tech-category,
  .experience-item,
  .project-card {
    box-shadow: none !important;
    border: 1px solid #d1d5db !important;
  }
  
  .profile-image {
    animation: none !important;
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for accessibility */
.tech-tag:focus,
.nav-link:focus,
.social-link:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}