/* ==========================================================================
   Universal Fun App Engine - Layout & Structure
   ========================================================================== */

/* Main Container Shell */
.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text-main);
  text-decoration: none;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-icon {
  font-size: 1.5rem;
}

/* Header Main Navigation Menu */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-nav-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background-color 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-hover, rgba(0, 0, 0, 0.05));
  text-decoration: none;
}

.site-nav-link.active {
  color: var(--color-primary);
  background-color: rgba(79, 70, 229, 0.08);
}

.main-content {
  flex: 1;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.homepage-content {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Card Container */
.card-container {
  background-color: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  padding: 2rem;
  margin-bottom: 2rem;
}

/* Footer Layout */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: auto;
}

/* Grid Layout for App Discovery Portal */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}