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

body {
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 100%);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #fff;
  min-height: 100vh;
}

/* Header Styles */
header {
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  padding: 1.5rem 2rem;
  border-bottom: 2px solid #00ff41;
  box-shadow: 0 4px 20px rgba(0, 255, 65, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #00ff41;
  text-shadow: 0 0 10px rgba(0, 255, 65, 0.5);
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-btn {
  background: transparent;
  border: 2px solid #00ff41;
  color: #00ff41;
  padding: 0.6rem 1.5rem;
  cursor: pointer;
  font-size: 1rem;
  font-family: monospace;
  transition: all 0.3s ease;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-decoration: none;
  display: inline-block;
}

.nav-btn:hover {
  background: #00ff41;
  color: #000;
  box-shadow: 0 0 20px rgba(0, 255, 65, 0.6);
  transform: translateY(-2px);
}

.nav-btn.active {
  background: #00ff41;
  color: #000;
}

/* Main Content */
.container {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 2rem;
}

/* Content Sections */
.content-section {
  display: none;
  animation: fadeIn 0.5s ease;
}

.content-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-card {
  background: rgba(0, 0, 0, 0.6);
  border: 2px solid #00ff41;
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 20px rgba(0, 255, 65, 0.1);
}

.section-card h2 {
  color: #00ff41;
  margin-bottom: 1rem;
  font-size: 2rem;
  text-shadow: 0 0 10px rgba(0, 255, 65, 0.5);
}

.section-card h3 {
  color: #00ff41;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.section-card p, .section-card li {
  line-height: 1.8;
  color: #d0d0d0;
  margin-bottom: 0.5rem;
}

.section-card ul {
  list-style-position: inside;
  margin-left: 1rem;
}

/* Terminal Window */
.terminal-window {
  background: rgba(0, 0, 0, 0.9);
  border: 2px solid #00ff41;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 255, 65, 0.2);
  max-width: 900px;
  margin: 0 auto;
}

.terminal-header {
  background: rgba(0, 255, 65, 0.1);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid #00ff41;
}

.terminal-btn {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
}

.terminal-btn.close { background: #ff5f56; }
.terminal-btn.minimize { background: #ffbd2e; }
.terminal-btn.maximize { background: #27c93f; }

.terminal-title {
  margin-left: 1rem;
  font-family: monospace;
  font-size: 0.9rem;
  color: #00ff41;
}

#terminal {
  height: 500px;
  padding: 1rem;
}

.terminal {
  --background: #000;
  --color: #00ff41;
  --size: 1.2;
  font-size: 14px;
}

/* Contact Links */
.contact-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.contact-link {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background: rgba(0, 255, 65, 0.1);
  border: 2px solid #00ff41;
  color: #00ff41;
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.3s ease;
  font-family: monospace;
}

.contact-link:hover {
  background: #00ff41;
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 255, 65, 0.4);
}

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    width: 100%;
  }

  .nav-btn {
    flex: 1;
    min-width: 120px;
  }

  #terminal {
    height: 400px;
  }
}