/* Design tokens come from variables.css, which every page links first. */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 20, 0.55);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
  background: rgba(10, 14, 20, 0.85);
  border-bottom-color: rgba(0, 217, 245, 0.18);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rsem;
}

.nav-logo .brand-ease {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
  position: relative;
}

/* Sparrow-style underline sweep: gradient line grows from the left on hover */
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -6px;
  height: 1.5px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-teal), var(--accent-cyan));
  transition: right 0.25s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  right: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

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

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 5rem 0 2rem;
  margin-top: 6rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.footer-col p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 1rem;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

@media (max-width: 968px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.4rem 0.75rem;
    cursor: pointer;
  }
}

.mobile-dropdown-menu {
  position: fixed;
  top: 75px;
  right: 1.5rem;
  width: 240px;
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  padding: 1rem;
  gap: 0.5rem;
  z-index: 9999;
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: all 0.25s ease;
}

.mobile-dropdown-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.mobile-nav-link {
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  border-radius: 8px;
  font-weight: 500;
  transition: 0.2s;
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--accent-cyan);
  background: rgba(0, 217, 245, 0.1);
}

@media (max-width: 576px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}