/* ==========================================================================
   CloudVault Layout — App Shell
   Header, sidebar, content area, responsive breakpoints.
   All values reference theme.css custom properties — no hardcoded values.
   ========================================================================== */

/* --- App shell grid: header on top, sidebar left, content fills rest --- */

#app-shell {
  display: grid;
  grid-template-areas:
    "header header"
    "sidebar content";
  grid-template-rows: var(--layout-header-height) 1fr;
  grid-template-columns: var(--layout-sidebar-width) 1fr;
  height: 100vh;
  overflow: hidden;
}

/* --- Header --- */

#app-header {
  grid-area: header;
  display: flex;
  align-items: center;
  background-color: var(--color-base-raise-1);
  border-bottom: 1px solid var(--color-base-raise-3);
  z-index: var(--z-raised);
  padding: 0;
  overflow: hidden;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 100%;
  padding: 0 var(--spacing-lg);
}

.app-header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

.app-header__logo .icon--shield {
  width: 28px;
  height: 28px;
}

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

.app-header__user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.app-header__user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
}

.app-header__user-role {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* --- Sidebar --- */

#app-sidebar {
  grid-area: sidebar;
  background-color: var(--color-base-raise-1);
  border-right: 1px solid var(--color-base-raise-3);
  display: flex;
  flex-direction: column;
  padding: var(--spacing-md) 0;
  overflow-y: auto;
  transition: transform var(--transition-normal);
}

.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: 0 var(--spacing-sm);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar__link:hover {
  background-color: var(--color-base-raise-2);
  color: var(--color-text);
}

.sidebar__link.active {
  background-color: var(--color-primary-bg);
  color: var(--color-primary-hover);
  font-weight: var(--font-weight-medium);
}

.sidebar__link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  fill: currentColor;
}

.sidebar__section {
  margin-top: var(--spacing-lg);
  padding: 0 var(--spacing-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: var(--font-weight-semibold);
}

.sidebar--hidden {
  display: none;
}

/* --- Content area --- */

#app-container {
  grid-area: content;
  overflow-y: auto;
  padding: var(--spacing-lg);
  max-width: var(--layout-content-max-width);
  width: 100%;
  margin: 0 auto;
}

/* --- View wrapper (each view renders into a .view element) --- */

.view {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  min-height: var(--layout-content-min-height);
}

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.view-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

.view-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* --- Fullscreen view (login, share) — no sidebar/header --- */

.app-shell--fullscreen #app-header,
.app-shell--fullscreen #app-sidebar {
  display: none;
}

/* Scope to #app-shell so specificity matches the base #app-shell rule and the
   grid template actually collapses — without this the first row/column still
   reserve header/sidebar space, leaving the centered content visually offset. */
#app-shell.app-shell--fullscreen {
  grid-template-areas: "content";
  grid-template-rows: 1fr;
  grid-template-columns: 1fr;
}

.app-shell--fullscreen #app-container {
  padding: 0;
  max-width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Responsive: collapse sidebar below 768px --- */

@media (max-width: 768px) {
  #app-shell {
    grid-template-areas:
      "header"
      "content";
    grid-template-columns: 1fr;
  }

  #app-sidebar {
    position: fixed;
    top: var(--layout-header-height);
    left: 0;
    bottom: 0;
    width: var(--layout-sidebar-width);
    z-index: var(--z-dropdown);
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

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

  .app-header__menu-toggle {
    display: flex !important;
  }
}

.app-header__menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  color: var(--color-text);
  cursor: pointer;
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
}

.app-header__menu-toggle:hover {
  background-color: var(--color-base-raise-2);
}