/**
 * Layout Styles
 * Sidebar, containers, grids
 */

/* Skip to main content link — visible only on keyboard focus */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10001;
  padding: 0.75rem 1.25rem;
  background: var(--bg-primary, #1a1b26);
  color: var(--text-primary, #cdd6f4);
  border: 2px solid var(--color-accent, #89b4fa);
  border-radius: var(--radius-md, 8px);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

/* App Container */
.app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-header {
  min-height: 148px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
}

.sidebar-logo {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-lg);
  object-fit: contain;
}

.sidebar-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3);
}

.sidebar-section {
  margin-bottom: var(--space-4);
}

.sidebar-section-title {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0 var(--space-3);
  margin-bottom: var(--space-2);
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: 40px;
  padding: 0 var(--space-3);
  font-size: var(--text-base);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.sidebar-item:hover {
  background-color: var(--bg-elevated);
  color: var(--text-primary);
}

.sidebar-item.active {
  background-color: var(--sidebar-active-bg);
  color: var(--accent-primary);
}

.sidebar-item .nf {
  font-size: 18px;
  width: 20px;
  text-align: center;
}

.sidebar-item .ui-icon {
  width: 18px;
  height: 18px;
  color: currentColor;
}

.sidebar-footer {
  padding: var(--space-3);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.sidebar-theme {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar-theme-label {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-theme-select {
  height: 34px;
  font-size: var(--text-sm);
  padding-left: var(--space-2);
  padding-right: 36px;
}

/* Main Content */
.main {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.main::before {
  content: '';
  position: fixed;
  inset: 0 0 0 var(--sidebar-width);
  background-image: url('/assets/branding/northforge-logo.svg');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: min(46vw, 560px);
  opacity: 0.048;
  filter: saturate(0) contrast(1.08) brightness(1.08);
  pointer-events: none;
  z-index: 0;
}

.main > * {
  position: relative;
  z-index: 1;
}

/* Header */
.header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.header-title .nf {
  margin-right: var(--space-2);
  color: var(--accent-primary);
}

.header-title .ui-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Content */
.content {
  flex: 1;
  padding: var(--space-6);
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
}

/* Grids */
.grid {
  display: grid;
  gap: var(--space-5);
}

.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: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main {
    margin-left: 0;
  }

  .main::before {
    inset: 0;
  }
}

/* Flex utilities */
.flex {
  display: flex;
}

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

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

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

.gap-2 {
  gap: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

/* Section */
.section {
  margin-bottom: var(--space-8);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.section-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--space-1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  padding: var(--space-2);
}

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

/* Overlay for mobile sidebar */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
}

.sidebar-overlay.active {
  display: block;
}