:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --text-primary: #e0f7ff;
  --text-secondary: #8ab4f8;
  --card-bg: rgba(20, 25, 40, 0.6);
  --card-border: rgba(100, 200, 255, 0.3);
  --glow-primary: #00eeff;
  --glow-secondary: #a74cff;
  --font-heading: 'Orbitron', sans-serif;
  --font-body: 'Exo 2', sans-serif;
  --font-mono: 'Roboto Mono', monospace;
}

.dark-mode .video-overlay {
    background-color: rgba(0, 0, 0, 0.5); /* Dark mode overlay */
}
  
.light-mode .video-overlay {
    background-color: rgba(255, 255, 255, 0.3); /* Light mode overlay */
}

.light-mode {
  --bg-primary: #f0f4f8;
  --bg-secondary: #e6e9f0;
  --text-primary: #1a1a2e;
  --text-secondary: #001a33;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(150, 150, 150, 0.3);
  --glow-primary: #0099cc;
  --glow-secondary: #8a2be2;
}

.light-mode .hero {
  background: transparent;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
  transition: background-color 0.5s ease, color 0.5s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#tsparticles {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
}

header {
  padding: 1.5rem 2rem;
  text-align: center;
  backdrop-filter: blur(8px);
  background: rgba(10, 15, 30, 0.2);
  border-bottom: 1px solid var(--card-border);
}

header h1 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  background: linear-gradient(90deg, var(--glow-primary), var(--glow-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

main {
  flex: 1;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 2rem;
  width: 100%;
}

.hero {
  text-align: center;
  margin-bottom: 2rem;
  padding: 2rem;
  border-radius: 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: 0 0 20px rgba(0, 238, 255, 0.1);
}

.hero h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 1rem;
  background: linear-gradient(90deg, var(--glow-primary), var(--glow-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

.search-container {
  margin: 1.5rem auto;
  max-width: 600px;
  position: relative;
}

.search-container input {
  width: 100%;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  backdrop-filter: blur(6px);
  font-size: 1rem;
}

.search-container input::placeholder {
  color: var(--text-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.4s ease;
  backdrop-filter: blur(4px);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 25px rgba(0, 238, 255, 0.15);
  border-color: var(--glow-primary);
}

.project-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-bottom: 1px solid var(--card-border);
}

.project-info {
  padding: 1.5rem;
}

.project-info h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin-bottom: 0.6rem;
  color: var(--glow-primary);
}

.project-info p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.launch-btn {
  display: inline-block;
  background: linear-gradient(90deg, var(--glow-primary), var(--glow-secondary));
  color: var(--bg-primary);
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-weight: 600;
  transition: all 0.3s ease;
}

.launch-btn:hover {
  box-shadow: 0 0 15px var(--glow-primary);
  transform: scale(1.05);
}

footer {
  text-align: center;
  padding: 1.5rem;
  margin-top: auto;
  background: rgba(10, 15, 30, 0.3);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--card-border);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

footer a {
  color: var(--glow-primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  header, main {
    padding: 1rem;
  }

  header h1 {
    font-size: 1.6rem;
  }

  .hero h2 {
    font-size: 2rem;
  }
}