/* ============================================
   NOTED - Main App Layout
   ============================================ */

#app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* Sidebar */
#sidebar {
  width: var(--sidebar-width);
  max-width: 50vw;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: width var(--transition);
  overflow: hidden;
  position: relative;
}

#sidebar.collapsed {
  width: 0 !important;
  min-width: 0 !important;
  border-right: none;
  padding: 0;
  overflow: hidden;
}

#sidebar.collapsed * {
  visibility: hidden;
}

/* Floating button to reopen sidebar */
#sidebar-reopen {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 50;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  transition: all var(--transition-fast);
}

#sidebar-reopen:hover {
  background: var(--accent-muted);
  color: var(--accent);
}

#sidebar.collapsed ~ #main-content #sidebar-reopen,
body.sidebar-collapsed #sidebar-reopen {
  display: flex;
}

/* Sidebar Header */
#sidebar-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}

#user-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#user-display {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Sidebar Columns */
#sidebar-columns {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.sidebar-col {
  width: var(--sidebar-col-width);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
  transition: background-color var(--transition);
}

.sidebar-col:last-child {
  border-right: none;
  flex: 1;
  min-width: 0;
}

.sidebar-col-header {
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 600;
  flex-shrink: 0;
}

.sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px;
}

/* Main Content */
#main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* Resize Handle */
.sidebar-resize-handle {
  width: 4px;
  cursor: col-resize;
  background: transparent;
  transition: background-color var(--transition);
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: 5;
}

.sidebar-resize-handle:hover,
.sidebar-resize-handle.active {
  background: var(--accent-muted);
}