* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fafafa;
  margin: 0;
  padding-top: 60px;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  height: 60px;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1a1a1a;
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-logo:hover {
  color: #0066cc;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: #555;
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: #0066cc;
  text-decoration: none;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: #0066cc;
  transition: width 0.3s ease;
}

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

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: 4rem;
  padding: 2rem 0;
}

.profile-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 0.5rem;
}

.tagline {
  font-size: 1.1rem;
  color: #666;
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.1rem;
  color: #555;
  max-width: 600px;
  margin: 1.5rem auto;
  line-height: 1.8;
  transition: opacity 0.5s ease-in-out;
}

.rotating-text {
  opacity: 1;
}

.rotating-about {
  transition: opacity 0.5s ease-in-out;
  opacity: 1;
}

/* Social Icons */
.social-icons {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.social-icons a {
  color: #555;
  font-size: 1.8rem;
  transition: color 0.3s ease, transform 0.3s ease;
}

.social-icons a:hover {
  color: #0066cc;
  transform: translateY(-3px);
}

/* Sections */
section {
  margin-bottom: 4rem;
  padding: 2rem;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

h2 {
  font-size: 1.8rem;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid #e0e0e0;
  padding-bottom: 0.5rem;
}

section p {
  color: #555;
  line-height: 1.8;
  margin-bottom: 1rem;
}

/* Projects Grid */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.project-card {
  padding: 1.5rem;
  background: #f9f9f9;
  border-radius: 6px;
  border-left: 4px solid #0066cc;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.project-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 0.75rem;
}

.project-card p {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.6;
}

/* Contact Section */
.contact {
  text-align: center;
}

.cta-button {
  display: inline-block;
  padding: 0.75rem 2rem;
  margin-top: 1rem;
  background: #0066cc;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.3s ease, transform 0.3s ease;
}

.cta-button:hover {
  background: #0052a3;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

/* Links */
a {
  color: #0066cc;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #0052a3;
  text-decoration: underline;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 3rem;
  padding: 2rem 0;
  color: #999;
  font-size: 0.9rem;
  border-top: 1px solid #e0e0e0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 1rem;
  }

  .nav-menu {
    gap: 1rem;
  }

  .nav-link {
    font-size: 0.9rem;
  }

  main {
    padding: 2rem 1rem;
  }

  h1 {
    font-size: 2rem;
  }

  .profile-photo {
    width: 150px;
    height: 150px;
  }

  .social-icons a {
    font-size: 1.5rem;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  section {
    padding: 1.5rem;
  }
}