/* ==========================================================================
   Layout Styles (Grid, Containers, Navbar, Footer)
   ========================================================================== */

/* Containers */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.container-sm {
  max-width: 800px;
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }
}

/* Sections */
.section {
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-16);
  position: relative;
}

@media (min-width: 1024px) {
  .section {
    padding-top: var(--spacing-24);
    padding-bottom: var(--spacing-24);
  }
}

.section-bg-alt {
  background-color: var(--color-bg-alt);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }

@media (min-width: 640px) {
  .grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--spacing-2); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }
.flex-wrap { flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   Navbar Styles
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  text-decoration: none;
}

.navbar-brand svg {
  width: 32px;
  height: 32px;
  fill: url(#brand-gradient);
}

.nav-links {
  display: none; /* Mobile hidden by default */
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
  }
}

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

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
  border-radius: var(--radius-full);
}

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

/* Nav Actions (Dark mode toggle, CTA) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-text-primary);
}

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

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: var(--color-bg-default);
  z-index: 999;
  padding: var(--spacing-6) var(--spacing-4);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.mobile-nav-link {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  padding: var(--spacing-2) 0;
  border-bottom: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   Footer Styles
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  }
}

.footer-brand .navbar-brand {
  margin-bottom: var(--spacing-4);
}

.footer-desc {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-6);
  max-width: 300px;
}

.footer-heading {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer-link {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.w-100 { width: 100%; }