:root {
  --bg-color: #ffffff;
  --text-color: #1a1a1a;
  --accent-color: #00c8ff;
  --neon-primary: #00c8ff;
  --neon-secondary: #ff3366;
  --neon-highlight: #00ff9d;
  --shadow-color: rgba(0, 200, 255, 0.2);
  --card-bg: rgba(255, 255, 255, 0.9);
}
[data-theme="dark"] {
  --bg-color: #0a0a0a;
  --text-color: #ffffff;
  --accent-color: #0ff;
  --neon-primary: #0ff;
  --neon-secondary: #f0f;
  --neon-highlight: #0f0;
  --shadow-color: rgba(0, 255, 255, 0.15);
  --card-bg: rgba(0, 255, 255, 0.05);
}

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;600&display=swap');
    
body {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: all 0.3s;
  min-height: 100vh;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 50px;
  border-bottom: 1px solid var(--accent-color);
  box-shadow: 0 0 10px var(--shadow-color);
  background: var(--card-bg);
  backdrop-filter: blur(10px);
}

.logo {
  font-size: 2em;
  color: var(--neon-primary);
  text-shadow: 0 0 10px var(--neon-primary);
  letter-spacing: 2px;
  margin: 0;
}

nav a {
  margin: 0 15px;
  text-decoration: none;
  color: var(--text-color);
  transition: all 0.3s;
  font-weight: 600;
  position: relative;
}

nav a:hover {
  color: var(--neon-secondary);
  text-shadow: 0 0 10px var(--neon-secondary);
}

nav a::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--neon-secondary);
  transform: scaleX(0);
  transition: transform 0.3s;
}

nav a:hover::after {
  transform: scaleX(1);
}

.theme-toggle {
  cursor: pointer;
  background: none;
  border: 2px solid var(--neon-highlight);
  padding: 8px 15px;
  border-radius: 5px;
  color: var(--neon-highlight);
  transition: all 0.3s;
  font-family: 'Orbitron', sans-serif;
}

.theme-toggle:hover {
  background: var(--neon-highlight);
  color: var(--bg-color);
  box-shadow: 0 0 10px var(--neon-highlight);
}

section {
  padding: 60px 50px;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}

h1 {
  margin-bottom: 20px;
  color: var(--neon-primary);
  text-shadow: 0 0 10px var(--neon-primary);
  font-size: 2.5em;
}

h2 {
  margin-bottom: 20px;
  color: var(--neon-secondary);
  text-shadow: 0 0 10px var(--neon-secondary);
  font-size: 2em;
}

.projects, .skills, .achievements {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.card {
  border: 1px solid var(--accent-color);
  border-radius: 15px;
  padding: 25px;
  text-align: left;
  transition: all 0.3s;
  background: var(--card-bg);
  backdrop-filter: blur(5px);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px var(--shadow-color);
  border-color: var(--neon-secondary);
}

.card h3 {
  color: var(--neon-highlight);
  margin-bottom: 15px;
}

.tech-stack {
  display: flex;
  gap: 15px;
  margin-top: 15px;
  font-size: 1.5em;
  flex-wrap: wrap;
}

.tech-icon {
  color: var(--neon-secondary);
  transition: all 0.3s;
}

.tech-icon:hover {
  color: var(--neon-primary);
  text-shadow: 0 0 10px var(--neon-primary);
  transform: scale(1.1);
}

footer {
  border-top: 1px solid var(--accent-color);
  padding: 20px;
  text-align: center;
  font-size: 14px;
  background: var(--card-bg);
  color: var(--text-color);
}

#contact a {
  color: var(--neon-primary);
  text-decoration: none;
  transition: all 0.3s;
}

#contact a:hover {
  color: var(--neon-secondary);
  text-shadow: 0 0 10px var(--neon-secondary);
}

@media (max-width: 768px) {
  header {
    padding: 15px 20px;
  }
  
  section {
    padding: 40px 20px;
  }

  h1 {
    font-size: 2em;
  }

  .card {
    padding: 20px;
  }
}