/**
 * Layout CSS - Responsive Layouts
 * An Immigrant's Story
 */

/* Main Layout Structure */
.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  background-color: var(--color-primary);
  color: white;
  padding: var(--spacing-md) 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

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

.site-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: white;
  text-decoration: none;
  margin: 0;
}

.site-title:hover {
  color: white;
  text-decoration: none;
}

.site-main {
  flex: 1;
  padding: var(--spacing-2xl) 0;
}

.site-footer {
  background-color: var(--color-secondary);
  color: white;
  padding: var(--spacing-xl) 0;
  margin-top: auto;
  text-align: center;
}

.site-footer p {
  margin-bottom: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.8);
}

.site-footer a {
  color: white;
  text-decoration: underline;
}

/* Reader Layout */
.reader-layout {
  display: flex;
  min-height: calc(100vh - 60px); /* Adjust based on header height */
}

.sidebar {
  width: 300px;
  background-color: var(--color-background-alt);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  position: sticky;
  top: 60px; /* Height of header */
  height: calc(100vh - 60px);
  transition: transform var(--transition-base);
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  background-color: white;
}

.sidebar-header h2 {
  font-size: var(--font-size-lg);
  margin-bottom: 0;
  color: var(--color-primary);
}

.reader-content {
  flex: 1;
  padding: var(--spacing-2xl) var(--spacing-xl);
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

/* Navigation Controls */
.navigation-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-3xl);
}

.nav-info {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* Menu Toggle (Mobile) */
.menu-toggle {
  display: none;
  background-color: white;
  color: var(--color-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

.menu-toggle:hover {
  background-color: var(--color-background-alt);
}

.menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-sticky) - 1);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.menu-overlay.visible {
  display: block;
  opacity: 1;
}

/* Responsive Layouts */
@media (max-width: 1024px) {
  .sidebar {
    width: 280px;
  }

  .reader-content {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: inline-block;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    height: 100vh;
    transform: translateX(-100%);
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-xl);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .reader-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .navigation-controls {
    flex-direction: column;
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .site-header {
    padding: var(--spacing-sm) 0;
  }

  .site-title {
    font-size: var(--font-size-lg);
  }

  .site-main {
    padding: var(--spacing-lg) 0;
  }

  .reader-content {
    padding: var(--spacing-md);
  }

  .sidebar {
    width: 85vw;
  }
}

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

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }
.gap-5 { gap: var(--spacing-xl); }