/* Enhanced Professional Portfolio Styles */

/* CSS Custom Properties for Design System */
:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary-color: #06b6d4;
  --accent-color: #f59e0b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-dark: #0f172a;
  
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  
  --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);
  
  --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent-color) 0%, #ef4444 100%);
  --gradient-subtle: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-normal);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout Components */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
  position: relative;
}

.section-gray {
  background-color: var(--bg-tertiary);
}

/* Enhanced Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

header.scrolled {
  box-shadow: var(--shadow-lg);
  background-color: rgba(255, 255, 255, 0.98);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 0;
}

.logo {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-highlight {
  color: var(--primary-color);
}

nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 0.5rem 0;
  transition: var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.contact-btn {
  background: var(--gradient-primary);
  color: white !important;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.contact-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.contact-btn::after {
  display: none;
}

/* Mobile Navigation */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius-md);
  transition: var(--transition-normal);
}

.mobile-toggle:hover {
  background-color: var(--bg-tertiary);
}

.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg);
}

.mobile-nav.active {
  display: block;
  animation: slideDown 0.3s ease;
}

.mobile-links {
  display: flex;
  flex-direction: column;
  padding: 1rem 2rem;
  gap: 0.5rem;
}

.mobile-links .nav-link {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-light);
}

.mobile-links .nav-link:last-child {
  border-bottom: none;
}

.mobile-links .contact-btn {
  margin-top: 1rem;
  text-align: center;
  display: inline-block;
}

/* Enhanced Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
  z-index: 2;
  position: relative;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero h1 {
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 2rem;
}

.hero-text {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Enhanced Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--gradient-primary);
  color: white;
  padding: 1rem 2rem;
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.btn i {
  transition: transform var(--transition-normal);
}

.btn:hover i {
  transform: translateX(4px);
}

.btn-dark {
  background: var(--text-primary);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--text-primary);
  color: white;
  border-color: var(--text-primary);
}

/* Decorative Elements */
.bg-blur {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.1;
  z-index: 1;
}

.blur-1 {
  width: 400px;
  height: 400px;
  background: var(--gradient-primary);
  top: 10%;
  right: 10%;
  animation: float 6s ease-in-out infinite;
}

.blur-2 {
  width: 300px;
  height: 300px;
  background: var(--gradient-accent);
  bottom: 20%;
  left: 10%;
  animation: float 8s ease-in-out infinite reverse;
}

/* Section Titles */
.section-title {
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

/* Enhanced About Section */
.about-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.about-content .lead {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 3rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

.stat-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
}

/* Experience Timeline */
.experience-timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 20px; /* Space for the line and dot */
}

.experience-timeline::before {
  content: '';
  position: absolute;
  left: 10px; /* Center the line */
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--primary-color); /* Solid blue line */
}

.experience-item {
  display: flex;
  align-items: center; /* Center items vertically */
  gap: 20px; /* Space between dot and content */
  margin-bottom: 60px; /* Increased space for better separation */
  position: relative;
}

.experience-item::before {
  content: '';
  position: absolute;
  left: 5px; /* Slightly offset for centering */
  top: 50%; /* Center vertically */
  transform: translateY(-50%); /* Adjust to center the dot */
  width: 12px;
  height: 12px;
  background: var(--primary-color); /* Blue dot */
  border-radius: 50%;
  border: none;
  box-shadow: none;
}

.experience-date {
  min-width: 120px;
  font-weight: 600;
  color: var(--primary-color);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
  text-align: right; /* Align text to the right */
  margin-right: 10px; /* Space before the line */
}

.experience-content {
  flex: 1;
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
  margin-left: 20px; /* Space after the dot */
}

.experience-content:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .experience-timeline {
    padding-left: 20px;
  }

  .experience-timeline::before {
    display: block;
    left: 10px;
  }

  .experience-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .experience-item::before {
    display: block;
    left: 5px;
    top: 10px; /* Reset to top for mobile */
    transform: none; /* Remove transform for mobile */
  }

  .experience-date {
    position: static;
    min-width: auto;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    text-align: center;
    margin-bottom: 1rem;
    margin-right: 0;
  }

  .experience-content {
    margin-left: 0;
  }
}

/* Hero Actions */
.hero-actions {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: 2rem 0;
  text-align: center;
}

.footer-content p {
  color: #94a3b8;
  margin-bottom: 0.5rem;
}

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

/* Form Validation Styles */
.error-message {
  color: var(--error-color);
  font-size: 0.875rem;
  margin-top: 0.5rem;
  display: none;
}

.form-group.error input,
.form-group.error textarea {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group.error .error-message {
  display: block;
}

/* Testimonials Section */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.testimonial-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 1rem;
  left: 2rem;
  font-size: 4rem;
  color: var(--primary-color);
  opacity: 0.3;
  font-family: Georgia, serif;
}

.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.testimonial-content {
  margin-bottom: 2rem;
}

.testimonial-content p {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 0;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-info h4 {
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.author-info p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Certifications */
.certifications-section {
  margin-top: 4rem;
  text-align: center;
}

.certifications-title {
  font-size: 1.75rem;
  color: var(--text-primary);
  margin-bottom: 3rem;
  position: relative;
}

.certifications-title::after {
  content: '';
  position: absolute;
  bottom: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.certification-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  text-align: left;
}

.certification-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.certification-item i {
  font-size: 2.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  min-width: 40px;
}

.cert-info h4 {
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.cert-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Skip Link for Accessibility */
.skip-link:focus {
  top: 6px !important;
}

/* Enhanced Education Section */
.education-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  max-width: 900px;
  margin: 0 auto;
}

.education-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.edu-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.edu-header h3 {
  color: var(--text-primary);
  font-size: 1.5rem;
  margin-bottom: 0;
}

.edu-date {
  background: var(--gradient-primary);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-lg);
  font-size: 0.9rem;
  font-weight: 600;
}

.edu-degree {
  font-size: 1.25rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 2rem;
}

.edu-courses h4 {
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.course-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  list-style: none;
}

.course-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  transition: var(--transition-normal);
}

.course-list li:hover {
  background: var(--bg-tertiary);
  transform: translateX(5px);
}

.course-list i {
  color: var(--success-color);
  font-size: 0.9rem;
}

/* Enhanced Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 3rem;
  margin-top: 2rem;
}

.project-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  position: relative;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.project-image {
  position: relative;
  height: 250px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.8) 0%, rgba(6, 182, 212, 0.8) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-category {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 2;
}

.project-category span {
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-color);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-lg);
  font-size: 0.85rem;
  font-weight: 600;
  backdrop-filter: blur(10px);
}

.project-content {
  padding: 2rem;
}

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

.project-content p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.project-tags span {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-lg);
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition-normal);
}

.project-tags span:hover {
  background: var(--primary-color);
  color: white;
}

.project-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.project-links .btn-dark,
.project-links .btn-outline {
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  flex: 1;
  min-width: 120px;
  justify-content: center;
}

/* Enhanced Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
  margin-top: 2rem;
}

.skill-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  text-align: center;
}

.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.skill-header {
  margin-bottom: 2rem;
}

.skill-header i {
  font-size: 3rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.skill-header h3 {
  color: var(--text-primary);
  margin-bottom: 0;
}

.skill-list {
  list-style: none;
  display: grid;
  gap: 1rem;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  transition: var(--transition-normal);
  text-align: left;
}

.skill-item:hover {
  background: var(--bg-tertiary);
  transform: translateX(5px);
}

.skill-item i {
  font-size: 1.5rem;
  color: var(--primary-color);
  width: 24px;
  text-align: center;
}

.skill-item span {
  font-weight: 500;
  color: var(--text-primary);
}

/* Animations */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

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

.section-animation {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.section-animation.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Enhanced Responsive Design */
@media (max-width: 1024px) {
  .container {
    padding: 0 2rem;
  }
  
  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .experience-timeline::before {
    left: 10px;
  }
  
  .experience-item::before {
    left: 4px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }
  
  section {
    padding: 4rem 0;
  }
  
  nav {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero {
    min-height: 90vh;
    text-align: center;
    padding: 6rem 0;
  }
  
  .hero-content {
    max-width: 100%;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
  }
  
  .experience-timeline {
    padding-left: 20px;
  }

  .experience-timeline::before {
    display: block;
    left: 10px;
  }
  
  .experience-item {
    flex-direction: column;
    gap: 1rem;
  }
  
  .experience-item::before {
    display: block;
    left: 4px;
    top: 10px;
  }
  
  .experience-date {
    position: static;
    min-width: auto;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    text-align: center;
    margin-bottom: 1rem;
  }
  
  .experience-content {
    margin-left: 0;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .certifications-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .certification-item {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  
  .project-links {
    flex-direction: column;
  }
  
  .project-links .btn-dark,
  .project-links .btn-outline {
    flex: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .header-container {
    padding: 1rem 0;
  }
  
  .education-card,
  .skill-card,
  .project-content {
    padding: 2rem 1.5rem;
  }
  
  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
  }
}

/* Print Styles */
@media print {
  .hero,
  header,
  .mobile-toggle,
  .mobile-nav,
  .bg-blur {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  section {
    padding: 2rem 0;
    page-break-inside: avoid;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --text-primary: #000000;
    --text-secondary: #333333;
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --border-color: #000000;
  }
}

/* Enhanced Achievements Section */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.achievement-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.achievement-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

.achievement-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.achievement-icon {
  font-size: 3rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
}

.achievement-card h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.achievement-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

/* Enhanced Contact Section */
.contact-section {
  background: var(--bg-primary);
  position: relative;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h3 {
  color: var(--text-primary);
  margin-bottom: 2rem;
  font-size: 1.5rem;
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  transition: var(--transition-normal);
}

.contact-item:hover {
  background: var(--bg-tertiary);
  transform: translateX(5px);
}

.contact-item i {
  font-size: 1.25rem;
  color: var(--primary-color);
  width: 24px;
  text-align: center;
}

.contact-item span {
  color: var(--text-primary);
  font-weight: 500;
}

.contact-form {
  background: var(--bg-secondary);
  padding: 2.5rem;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-normal);
  background: var(--bg-primary);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Social Links */
.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  justify-content: center;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--bg-secondary);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: all var(--transition-normal);
  border: 2px solid var(--border-color);
}

.social-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Success/Error Messages */
.message {
  padding: 1rem;
  border-radius: var(--border-radius-md);
  margin-bottom: 1rem;
  font-weight: 500;
}

.message.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.message.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Scroll Progress Indicator */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--gradient-primary);
  z-index: 1001;
  transition: width 0.1s ease;
}

/* Enhanced Hover Effects */
.hover-lift {
  transition: transform var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-5px);
}

/* Focus Styles for Accessibility */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

button:focus,
.btn:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}