/**
 * Layout styles - Sidebar + Topbar scaffolding
 */

.app-container {
  display: flex;
  min-height: 100vh;
  position: relative;
}

.app-container::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: var(--brand-logo, none);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  opacity: 0.05;
  pointer-events: none;
  z-index: 0;
}

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

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--color-bg-primary);
  border-right: 1px solid var(--color-border);
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--topbar-height);
  display: flex;
  align-items: center;
}

.sidebar-logo {
  width: 100%;
  height: 56px;
  background-image: var(--brand-logo, none);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
}

.sidebar-nav {
  padding: var(--spacing-sm);
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-primary);
  border-radius: var(--border-radius);
  margin-bottom: 2px;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  position: relative;
}

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

.sidebar-nav-item.active {
  background-color: var(--color-primary);
  color: white;
  font-weight: 600;
}

.sidebar-nav-item.active {
  box-shadow: 0 8px 20px rgba(0, 102, 204, 0.25);
}

.sidebar-nav-item.active:hover {
  background-color: var(--color-primary);
  color: white;
}

.sidebar-nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.4rem;
  height: 1.4rem;
  font-size: 1.2rem;
  line-height: 1;
  background: none;
  color: inherit;
  transition: transform var(--transition-fast);
}

.sidebar-nav-item:hover .sidebar-nav-icon {
  transform: translateY(-1px);
}

.sidebar-nav-item.active .sidebar-nav-icon {
}

.sidebar-nav-item.active .sidebar-nav-icon svg {
  color: white;
}

.sidebar-nav-text {
  flex: 1;
}

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

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

@supports ((-webkit-backdrop-filter: blur(6px)) or (backdrop-filter: blur(6px))) {
  .topbar {
    background-color: rgba(255, 255, 255, 0.78);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }
}

.topbar-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-bg-primary);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

.topbar-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--color-text-primary);
}

.topbar-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Content area */
.content-area {
  flex: 1;
  padding: var(--spacing-xl);
  overflow-y: auto;
}

.content-area {
  animation: pageFadeIn 0.35s ease;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .content-area {
    animation: none;
  }
}

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-fast);
    width: min(85vw, 320px);
  }

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

  .main-content {
    margin-left: 0 !important;
    width: 100%;
    min-width: 0;
  }

  .topbar {
    padding: 0 var(--spacing-md);
  }

  .topbar-toggle {
    display: inline-flex;
  }

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

  .page-header {
    margin-bottom: var(--spacing-lg);
  }

  #calendar-view-content {
    overflow-x: auto;
  }

  .calendar-grid {
    min-width: max-content;
  }
}

/* Login page styling */
body.login-page .content-area {
  padding: 0;
  overflow: hidden;
}

body.login-page .main-content {
  height: 100vh;
}

/* Page header */
.page-header {
  margin-bottom: var(--spacing-xl);
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}