/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  z-index: 1000;
  transition: background var(--transition-normal), backdrop-filter var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(5, 8, 20, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-cyan);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #000;
  box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-cyan-strong);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: var(--bg-surface-hover);
  border-color: var(--text-secondary);
}

/* --- Cards --- */
.glass-card {
  background: var(--bg-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-surface);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 240, 255, 0.3);
  box-shadow: var(--glow-cyan);
}

/* --- Social Icons --- */
.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-link {
  color: var(--text-secondary);
  font-size: 1.5rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
  color: var(--accent-cyan);
  transform: translateY(-3px);
}

/* --- Footer --- */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer p {
  margin: 0;
  font-size: 0.9rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(5, 8, 20, 0.95);
    backdrop-filter: blur(12px);
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
  }

  .nav-links.show {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }
}