:root {
  --primary: #2563eb;
  --primary-light: #60a5fa;
  --text: #1f2937;
  --text-light: #4b5563;
  --background: #ffffff;
  --background-alt: #f3f4f6;
  --border: #e5e7eb;
  --shadow: rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --transition: 0.3s ease;
}

[data-theme='dark'] {
  --primary: #60a5fa;
  --primary-light: #93c5fd;
  --text: #f3f4f6;
  --text-light: #d1d5db;
  --background: #111827;
  --background-alt: #1f2937;
  --border: #374151;
  --shadow: rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  transition: background-color var(--transition), color var(--transition);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--background);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  z-index: 100;
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary);
}

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

.nav-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

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

.theme-btn {
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius);
  transition: background-color var(--transition);
}

.theme-btn:hover {
  background: var(--background-alt);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  background: linear-gradient(to right, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}

.subtitle {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--text-light);
  margin-bottom: 2rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.social-links a {
  color: var(--text);
  font-size: 1.5rem;
  transition: color var(--transition);
}

.social-links a:hover {
  color: var(--primary);
}

/* Sections */
section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 1rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  text-align: center;
}

/* About Section */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

.tech-item {
  background: var(--background-alt);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-weight: 500;
}

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

.project-card {
  background: var(--background-alt);
  padding: 2rem;
  border-radius: var(--radius);
  transition: transform var(--transition);
}

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

.project-card h3 {
  margin-bottom: 1rem;
  color: var(--primary);
}

.project-tech {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.project-tech span {
  background: var(--background);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
}

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

.cta-button {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 1rem 2rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 500;
  margin-top: 2rem;
  transition: background-color var(--transition);
}

.cta-button:hover {
  background: var(--primary-light);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-light);
  border-top: 1px solid var(--border);
}

/* Dark mode icons */
[data-theme='dark'] .sun,
[data-theme='light'] .moon {
  display: none;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding: 1rem;
  }

  section {
    padding: 3rem 1rem;
  }

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