/* =========================================================================
   LAYOUT — app shell: header, sidebar, workspace, preview rail
   ========================================================================= */

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--header-h) 1fr;
  grid-template-areas:
    "header header"
    "sidebar main";
  min-height: 100vh;
}

/* ---- Header ------------------------------------------------------------*/
.app-header {
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 var(--space-5);
  background: var(--color-bg-elevated);
  border-bottom: 1px dashed var(--color-border);
  position: sticky;
  top: 0;
  z-index: 40;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 700;
}
.brand .brand-mark {
  width: 30px; height: 30px;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  display: grid; place-items: center;
  color: #fff;
  font-family: var(--font-display);
}

.header-actions { display: flex; align-items: center; gap: var(--space-2); }

.view-tabs { display: flex; gap: var(--space-1); background: var(--color-bg); padding: 3px; border-radius: var(--radius-pill); border: 1px solid var(--color-border); }
.view-tab {
  border: none; background: transparent; padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-pill); font-weight: 600; font-size: var(--fs-sm);
  color: var(--color-ink-soft);
  transition: all var(--dur-fast) var(--ease-out);
}
.view-tab.active { background: var(--color-ink); color: #fff; }
.view-tab:hover:not(.active) { background: var(--color-border); }

/* ---- Sidebar -----------------------------------------------------------*/
.app-sidebar {
  grid-area: sidebar;
  background: var(--color-bg-elevated);
  border-right: 1px dashed var(--color-border);
  overflow-y: auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.sidebar-section .sidebar-title {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  font-weight: 700;
  margin-bottom: var(--space-2);
  padding-left: var(--space-1);
}

.planner-type-list, .category-list { display: flex; flex-direction: column; gap: var(--space-1); }

.nav-item {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  text-align: left;
  width: 100%;
  color: var(--color-ink);
  font-weight: 500;
  transition: background var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.nav-item:hover { background: var(--color-border); }
.nav-item.active { background: var(--color-ink); color: #fff; }
.nav-item .nav-icon { width: 20px; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }

.category-group { margin-bottom: var(--space-3); }
.category-group summary {
  cursor: pointer;
  font-weight: 600;
  padding: var(--space-1) var(--space-1);
  color: var(--color-ink-soft);
  font-size: var(--fs-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.category-group summary::-webkit-details-marker { display: none; }
.category-group[open] summary { color: var(--color-accent); }
.category-item {
  display: block; width: 100%; text-align: left;
  padding: var(--space-1) var(--space-2) var(--space-1) var(--space-4);
  border: none; background: transparent; border-radius: var(--radius-sm);
  font-size: var(--fs-sm); color: var(--color-ink);
}
.category-item:hover { background: var(--color-border); }
.category-item.active { background: var(--color-accent); color: #fff; font-weight: 600; }

/* ---- Main workspace ------------------------------------------------------*/
.app-main {
  grid-area: main;
  display: grid;
  grid-template-columns: 1fr var(--preview-w);
  overflow: hidden;
}

.workspace {
  padding: var(--space-5);
  overflow-y: auto;
  min-width: 0;
}

.preview-rail {
  border-left: 1px dashed var(--color-border);
  background: var(--color-bg);
  padding: var(--space-5);
  overflow-y: auto;
  min-width: 0;
}

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

.section-heading {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---- Floating action button --------------------------------------------*/
.fab {
  position: fixed;
  right: var(--space-6);
  bottom: var(--space-6);
  width: 58px; height: 58px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  border: none;
  font-size: 1.6rem;
  box-shadow: var(--shadow-lg);
  display: grid; place-items: center;
  z-index: 60;
  transition: transform var(--dur-fast) var(--ease-out);
}
.fab:hover { transform: scale(1.06) rotate(90deg); }

/* ---- Mobile nav toggle (hidden on desktop) -----------------------------*/
.mobile-nav-toggle, .mobile-preview-toggle { display: none; }

/* ---- Grid utility layouts (dashboard / kanban / cards) -----------------*/
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--space-4); }

.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.row { display: flex; align-items: center; gap: var(--space-3); }
.row-wrap { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.spacer { flex: 1; }

/* Layout modes for planner body (chosen in Settings > Layout) */
.layout-kanban .checklist { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); align-items: start; }
.layout-timeline .checklist { position: relative; padding-left: var(--space-6); }
.layout-compact .checklist-item { padding: var(--space-1) var(--space-2); }
.layout-magazine .workspace { column-count: 2; column-gap: var(--space-6); }

.preview-footnote{ font-size:.75rem; color: var(--ink-faint); text-align:center; display:flex; gap:6px; align-items:center; justify-content:center;  margin-top: 50px;}