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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background-color: #ffffff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
}

.logo-text {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: #1a1a1a;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: #667eea;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  transition: width 0.3s ease;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.bar {
  width: 25px;
  height: 3px;
  background: #1a1a1a;
  margin: 3px 0;
  transition: 0.3s;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

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

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.title-line {
  display: block;
}

.gradient-text {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.2rem;
  color: #666;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.btn {
  padding: 0.875rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: transparent;
  color: #667eea;
  border: 2px solid #667eea;
}

.btn-secondary:hover {
  background: #667eea;
  color: white;
  transform: translateY(-2px);
}

.hero-social {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(102, 126, 234, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #667eea;
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-link:hover {
  background: #667eea;
  color: white;
  transform: translateY(-2px);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  background: white;
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transform: rotate(5deg);
  transition: transform 0.3s ease;
}

.hero-card:hover {
  transform: rotate(0deg) scale(1.05);
}

.card-content {
  text-align: center;
}

.card-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: white;
}

.hero-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #1a1a1a;
}

.hero-card p {
  color: #666;
  font-size: 0.95rem;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.bg-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(rgba(102, 126, 234, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(102, 126, 234, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}

.bg-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.1) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
}

/* Section Styles */
section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: #1a1a1a;
}

.section-subtitle {
  font-size: 1.2rem;
  color: #666;
  max-width: 600px;
  margin: 0 auto;
}

/* About Section */
.about {
  background: #f8fafc;
}

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

.about-description {
  font-size: 1.1rem;
  color: #555;
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.about-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: #667eea;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.9rem;
  color: #666;
  font-weight: 500;
}

.skills-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: #1a1a1a;
}

.skills-grid {
  display: grid;
  gap: 2rem;
}

.skill-category h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #1a1a1a;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  background: white;
  color: #667eea;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid rgba(102, 126, 234, 0.2);
  transition: all 0.3s ease;
}

.skill-tag:hover {
  background: #667eea;
  color: white;
  transform: translateY(-2px);
}

/* Education Section */
.education-timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.education-timeline::before {
  content: "";
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 4rem;
}

.timeline-marker {
  position: absolute;
  left: 22px;
  top: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 0 0 3px #667eea;
}

.timeline-marker.current {
  background: #667eea;
  animation: pulse 2s infinite;
}

.timeline-marker.completed {
  background: #10b981;
  box-shadow: 0 0 0 3px #10b981;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 3px #667eea, 0 0 0 6px rgba(102, 126, 234, 0.3);
  }
  50% {
    box-shadow: 0 0 0 3px #667eea, 0 0 0 12px rgba(102, 126, 234, 0.1);
  }
  100% {
    box-shadow: 0 0 0 3px #667eea, 0 0 0 6px rgba(102, 126, 234, 0.3);
  }
}

.timeline-content {
  background: white;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

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

.timeline-header h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #1a1a1a;
}

.timeline-date {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.85rem;
  font-weight: 600;
}

.timeline-institution {
  font-size: 1.1rem;
  font-weight: 600;
  color: #667eea;
  margin-bottom: 1rem;
}

.timeline-description {
  color: #555;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.timeline-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.highlight {
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* Experience Section */
.experience {
  background: #f8fafc;
}

.experience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.experience-card {
  background: white;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.experience-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.card-header {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.card-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  margin-right: 1rem;
}

.card-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #1a1a1a;
}

.experience-card p {
  color: #555;
  line-height: 1.7;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: white;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

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

.project-link {
  width: 50px;
  height: 50px;
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #667eea;
  text-decoration: none;
  transition: all 0.3s ease;
}

.project-link:hover {
  background: #667eea;
  color: white;
  transform: scale(1.1);
}

.project-content {
  padding: 2rem;
}

.project-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: #1a1a1a;
}

.project-description {
  color: #555;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag {
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* Contact Section */
.contact {
  background: #1a1a1a;
  color: white;
}

.contact .section-title,
.contact .section-subtitle {
  color: white;
}

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

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.contact-info p {
  color: #ccc;
  line-height: 1.7;
  margin-bottom: 2rem;
}

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

.contact-method {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.method-icon {
  width: 50px;
  height: 50px;
  background: rgba(102, 126, 234, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #667eea;
}

.method-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.method-content p {
  color: #ccc;
  margin: 0;
}

.contact-form {
  background: rgba(255, 255, 255, 0.05);
  padding: 2rem;
  border-radius: 15px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: white;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: white;
  font-family: inherit;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #667eea;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #999;
}

/* Footer */
.footer {
  background: #111;
  color: white;
  padding: 2rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-text p {
  color: #ccc;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social .social-link {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  color: #ccc;
}

.footer-social .social-link:hover {
  background: #667eea;
  color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    padding: 2rem 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero-content {
    padding-top: 50px;
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-stats {
    justify-content: center;
  }

  .timeline-item {
    padding-left: 2rem;
  }

  .education-timeline::before {
    left: 15px;
  }

  .timeline-marker {
    left: 7px;
  }

  .timeline-header {
    flex-direction: column;
    align-items: start;
    gap: 0.5rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .container {
    padding: 0 1rem;
  }

  section {
    padding: 3rem 0;
  }

  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .projects-grid,
  .experience-grid {
    grid-template-columns: 1fr;
  }

  .project-card,
  .experience-card {
    margin: 0 1rem;
  }
}