/* Gmail-style App Shell */
.app-shell {
  display: flex;
  min-height: 100vh;
}

/* Sidebar — light neutral rail, active item mint pill (dashboard reference) */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-surface-sidebar);
  color: var(--color-nav-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  transition: width var(--transition-base);
  overflow-y: auto;
  border-inline-start: 1px solid var(--color-gray-200);
}

.sidebar__logo {
  padding: var(--space-5) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-gray-200);
  text-decoration: none;
}

.sidebar__logo:hover {
  opacity: 0.92;
}

.sidebar__logo-img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 52px;
  object-fit: contain;
  object-position: center;
}

.sidebar__nav {
  flex: 1;
  padding: var(--space-4) 0;
}

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

.sidebar__section-title {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-nav-muted);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  margin-inline: var(--space-3);
  color: var(--color-nav-text);
  text-decoration: none;
  font-size: var(--text-sm);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar__link:hover {
  background: var(--color-nav-hover-bg);
  color: var(--color-black);
  text-decoration: none;
}

.sidebar__link--active {
  background: var(--color-nav-active-bg);
  color: var(--color-black);
  font-weight: var(--font-bold);
}

.sidebar__link--active:hover {
  background: var(--color-nav-active-bg);
  color: var(--color-black);
}

.sidebar__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  color: var(--color-nav-muted);
}

.sidebar__link--active .sidebar__icon {
  color: var(--color-primary);
}

.sidebar__badge {
  margin-right: auto;
  margin-left: 0;
  background: var(--color-danger);
  color: var(--color-white);
  font-size: var(--text-xs);
  padding: 2px 6px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
}

/* Main Area */
.main-area {
  flex: 1;
  margin-right: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Top Header */
.header {
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-4);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header__breadcrumb {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.header__breadcrumb a {
  color: var(--color-gray-600);
}

.header__breadcrumb a:hover {
  color: var(--color-primary);
}

.header__breadcrumb-sep {
  color: var(--color-gray-400);
}

.header__search {
  position: relative;
  width: 300px;
}

.header__search input {
  width: 100%;
  padding: var(--space-2) var(--space-4);
  padding-right: var(--space-10);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  background: var(--color-gray-100);
  font-size: var(--text-sm);
  outline: none;
  transition: border-color var(--transition-fast);
}

.header__search input:focus {
  border-color: var(--color-primary);
  background: var(--color-white);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__action-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-gray-600);
  position: relative;
  transition: background var(--transition-fast);
}

.header__action-btn:hover {
  background: var(--color-gray-200);
}

.header__notification-dot {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 8px;
  height: 8px;
  background: var(--color-danger);
  border-radius: var(--radius-full);
}

.header__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  cursor: pointer;
}

.header__user-menu {
  position: relative;
}

.header__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: var(--space-2) 0;
  display: none;
  z-index: 200;
}

.header__dropdown.is-open {
  display: block;
}

.header__dropdown-item {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--color-black);
  font-size: var(--text-sm);
}

.header__dropdown-item:hover {
  background: var(--color-gray-100);
  text-decoration: none;
}

/* Notification Dropdown */
.header__notification-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  width: 340px;
  display: none;
  z-index: 200;
  overflow: hidden;
}

.header__notification-dropdown.is-open {
  display: block;
}

.notif-dropdown__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.notif-dropdown__title {
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
}

.notif-dropdown__mark-all {
  border: none;
  background: none;
  color: var(--color-primary);
  font-size: var(--text-xs);
  cursor: pointer;
  padding: 0;
}

.notif-dropdown__mark-all:hover {
  text-decoration: underline;
}

.notif-dropdown__list {
  max-height: 320px;
  overflow-y: auto;
}

.notif-dropdown__empty {
  padding: var(--space-6) var(--space-4);
  text-align: center;
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

.notif-dropdown__item {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-gray-100);
  text-decoration: none;
  color: var(--color-black);
  transition: background var(--transition-fast);
}

.notif-dropdown__item:last-child {
  border-bottom: none;
}

.notif-dropdown__item:hover {
  background: var(--color-gray-50);
  text-decoration: none;
}

.notif-dropdown__item--unread {
  background: var(--color-info-bg);
}

.notif-dropdown__item-title {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  margin-bottom: 2px;
}

.notif-dropdown__item-body {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.notif-dropdown__item-time {
  font-size: 0.65rem;
  color: var(--color-gray-400);
  margin-top: 2px;
}

.notif-dropdown__footer {
  display: block;
  text-align: center;
  padding: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-primary);
  border-top: 1px solid var(--color-gray-200);
  text-decoration: none;
  font-weight: var(--font-bold);
}

.notif-dropdown__footer:hover {
  background: var(--color-gray-50);
  text-decoration: none;
}

/* Content Area */
.content {
  flex: 1;
  padding: var(--space-6);
}

.content__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.content__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-black);
}

/* Auth Layout */
.auth-layout {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: var(--space-4);
}

.auth-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  padding: var(--space-10);
}

.auth-card__logo {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-card__logo-img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 72px;
  margin: 0 auto;
  object-fit: contain;
}

.auth-card__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  text-align: center;
  margin-bottom: var(--space-6);
  color: var(--color-black);
}

/* Sidebar Toggle for Mobile */
.sidebar-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: var(--text-xl);
  color: var(--color-gray-700);
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(100%);
    width: 280px;
  }

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

  .main-area {
    margin-right: 0;
  }

  .sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
  }

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

  .content {
    padding: var(--space-4);
  }
}