/* =============================================================================
   GENERIC D365 SHELL — LAYOUT
   TopBar (48px) + SideNav (240/64px) + ContentArea
   Version: 1.0.0
   Last Updated: 2026-02-16
   ============================================================================= */

/* ─── TopBar ─── */
.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 16px;
  z-index: 1000;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.top-bar-logo {
  height: 32px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.top-bar-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.top-bar-center {
  flex: 1;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── Icon Button ─── */
.icon-button {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 4px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  transition: background-color 150ms ease-in-out;
}

.icon-button:hover {
  background-color: var(--bg-tertiary);
}

.icon-button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

/* ─── Theme Selector ─── */
.theme-selector {
  position: relative;
}

.theme-dropdown {
  position: absolute;
  top: 40px;
  right: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  box-shadow: var(--shadow-card);
  min-width: 180px;
  z-index: 2000;
  display: none;
  overflow: hidden;
}

.theme-dropdown.open {
  display: block;
}

.theme-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: background-color 150ms ease-in-out;
}

.theme-option:hover {
  background-color: var(--bg-tertiary);
}

.theme-option.active {
  color: var(--color-primary);
  font-weight: 600;
}

.theme-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ─── SideNav ─── */
.side-nav {
  position: fixed;
  top: 48px;
  left: 0;
  bottom: 0;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  width: 240px;
  overflow-x: hidden;
  overflow-y: auto;
  transition: width 180ms ease-in-out;
  z-index: 900;
}

.side-nav.collapsed {
  width: 64px;
}

.nav-group-label {
  padding: 16px 16px 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
}

.side-nav.collapsed .nav-group-label {
  display: none;
}

.nav-item {
  display: flex;
  align-items: center;
  height: 44px;
  padding: 0 16px;
  cursor: pointer;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  position: relative;
  font-family: inherit;
  font-size: 14px;
  transition: background-color 150ms ease-in-out;
}

.nav-item:hover {
  background-color: var(--bg-tertiary);
}

.nav-item:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.nav-item.active {
  color: var(--color-primary);
  background-color: var(--bg-tertiary);
}

.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--color-primary);
}

.nav-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.nav-label {
  margin-left: 14px;
  white-space: nowrap;
  overflow: hidden;
}

.side-nav.collapsed .nav-label {
  display: none;
}

/* ─── ContentArea ─── */
.content-area {
  position: fixed;
  top: 48px;
  left: 240px;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  padding: 24px;
  overflow-y: auto;
  transition: left 180ms ease-in-out;
}

.content-area.nav-collapsed {
  left: 64px;
}