/* ============================================================
   Base Layout — Processus Législatif v2
   CSS Grid app shell: sidebar + main content
   ============================================================ */

/* === App shell === */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: 1fr;
  min-height: 100vh;
  background: var(--color-bg);
  transition: grid-template-columns var(--transition-normal);
}

.app-shell.sidebar-collapsed {
  grid-template-columns: var(--sidebar-collapsed) 1fr;
}

/* === Sidebar === */
.sidebar {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-border);
  color: #E2E8F0;
  height: 100vh;
  position: sticky;
  top: 0;
  overflow: hidden;
  z-index: var(--z-sticky);
  transition: width var(--transition-normal);
  width: var(--sidebar-width);
}

.app-shell.sidebar-collapsed .sidebar {
  width: var(--sidebar-collapsed);
}

/* === Main area === */
.app-main {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow: hidden;
}

/* === Header === */
.app-header {
  position: sticky;
  top: 0;
  z-index: var(--z-dropdown);
  height: var(--header-height);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-4);
  box-shadow: var(--shadow-sm);
}

/* === Content === */
.app-content {
  flex: 1;
  padding: var(--space-6);
  width: 100%;
  min-width: 0;
}

/* === Footer === */
.app-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* === Sidebar overlay (hidden on desktop) === */
.sidebar-overlay {
  display: none;
}

/* === Header internals === */
.app-header__menu-btn {
  display: none;
}

.app-header__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.app-header__module-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
}

.app-header__controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.app-header__controls .btn--icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.app-header__controls .btn--icon:hover {
  color: var(--color-text);
  background: var(--color-bg-elevated);
  border-color: var(--color-border-mid);
}

.app-header__controls .btn--icon:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.app-header__controls .btn--icon:active {
  transform: translateY(1px);
}

.language-form {
  margin: 0;
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2px;
  background: var(--color-bg-alt);
}

.language-btn {
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  min-height: 44px;
  min-width: 44px;
  padding: 0 var(--space-2);
  border-radius: calc(var(--radius-md) - 2px);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: .02em;
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.language-btn:hover {
  color: var(--color-text);
  background: var(--color-bg-elevated);
}

.language-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.language-btn--active {
  background: var(--color-accent-dim);
  color: var(--color-accent);
}

.app-header__user-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.app-header__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: var(--text-xs);
}

/* === Sidebar internals === */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  min-height: var(--header-height);
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: #F1F5F9;
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-logo-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.sidebar-logo-text {
  overflow: hidden;
  white-space: nowrap;
  transition: opacity var(--transition-normal), width var(--transition-normal);
}

.app-shell.sidebar-collapsed .sidebar-logo-text {
  opacity: 0;
  width: 0;
}

.sidebar-toggle {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6B7280;  /* fixed: always on dark sidebar */
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.sidebar-toggle:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-3) 0;
}

.sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-item {
  display: block;
}

.sidebar-section {
  margin-bottom: var(--space-2);
}

.sidebar-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin: var(--space-3) var(--space-4);
  list-style: none;
}

.sidebar-section-label {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #6B7280;  /* fixed: always on dark sidebar */
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--transition-normal);
}

.app-shell.sidebar-collapsed .sidebar-section-label {
  opacity: 0;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  color: #9CA3AF;  /* fixed: sidebar is always dark, neutral-300 in dark theme ≈ #2A2A2A */
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: 0;
  min-height: 44px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  border-left: 3px solid transparent;
  white-space: nowrap;
  cursor: pointer;
}

.sidebar-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
  border-left-color: var(--color-accent);
}

.sidebar-link.active {
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border-left-color: var(--color-accent);
}

.sidebar-link svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

.sidebar-link-label {
  overflow: hidden;
  white-space: nowrap;
  transition: opacity var(--transition-normal);
}

.app-shell.sidebar-collapsed .sidebar-link-label {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar-footer {
  padding: var(--space-3) var(--space-2);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  overflow: hidden;
  flex: 1;
}

.sidebar-avatar {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
}

.sidebar-user-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  white-space: nowrap;
  transition: opacity var(--transition-normal);
}

.app-shell.sidebar-collapsed .sidebar-user-info {
  opacity: 0;
  width: 0;
}

.sidebar-user-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: #F1F5F9;
  text-overflow: ellipsis;
  overflow: hidden;
}

.sidebar-user-role {
  font-size: var(--text-xs);
  color: #6B7280;  /* fixed: always on dark sidebar */
  text-overflow: ellipsis;
  overflow: hidden;
}

.sidebar-logout {
  color: #6B7280;  /* fixed: always on dark sidebar */
  flex-shrink: 0;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.sidebar-logout:hover {
  color: var(--color-danger);
  background: rgba(220, 38, 38, 0.1);
}

.app-shell.sidebar-collapsed .sidebar-logout {
  width: 0;
  opacity: 0;
  overflow: hidden;
  padding: 0;
  margin: 0;
}

/* === Module tab navigation === */
.module-nav {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-2);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  overflow-x: auto;
  flex-wrap: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.module-nav__list {
  display: flex;
  gap: var(--space-1);
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: nowrap;
}

.module-nav__item {
  flex-shrink: 0;
}

.module-nav::-webkit-scrollbar {
  display: none;
}

.module-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
}

.module-nav-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.module-nav-link:hover {
  color: var(--color-accent);
  background: var(--color-bg);
}

.module-nav-link.active {
  color: var(--color-accent);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
  font-weight: var(--font-semibold);
}

/* === Breadcrumb === */
.breadcrumb {
  display: flex;
  align-items: center;
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
  margin-bottom: var(--space-4);
}

/* Legacy kebab selectors */
.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.breadcrumb-item a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumb-item a:hover { color: var(--color-accent); }
.breadcrumb-item.active { color: var(--color-primary); font-weight: var(--font-medium); }

.breadcrumb-separator {
  color: #94A3B8;
  width: 14px;
  height: 14px;
}

/* BEM selectors — used by v2 templates */
.breadcrumb__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  color: var(--color-text-subtle);
}

/* Chevron separator via ::before */
.breadcrumb__item + .breadcrumb__item::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  margin: 0 var(--space-1);
  background-color: var(--color-text-subtle);
  flex-shrink: 0;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E") center/contain no-repeat;
  opacity: 0.4;
}

.breadcrumb__item a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-1) var(--space-1);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.breadcrumb__item a:hover {
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.breadcrumb__item--current {
  color: var(--color-primary);
  font-weight: var(--font-medium);
  padding: var(--space-1) var(--space-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 280px;
}

/* === Page header area === */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.page-header__left {
  flex: 1;
  min-width: 0;
}

.page-header__title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-1);
}

.page-header__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
  line-height: var(--leading-normal);
}

.page-header__actions,
.page-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* === Responsive: mobile sidebar === */
@media (max-width: 1023px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .app-header__menu-btn {
    display: flex;
  }

  .sidebar {
    position: fixed;
    left: -100%;
    top: 0;
    height: 100vh;
    width: var(--sidebar-width) !important;
    z-index: var(--z-modal);
    transition: left var(--transition-normal);
  }

  .sidebar.open {
    left: 0;
  }

  .app-main {
    grid-column: 1;
  }

  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: calc(var(--z-modal) - 1);
  }

  .sidebar.open~.sidebar-overlay {
    display: block;
  }
}

@media (max-width: 767px) {
  .app-content {
    padding: var(--space-4);
  }

  .page-header {
    flex-direction: column;
  }

  .module-nav {
    margin-bottom: var(--space-4);
  }
}
