/* Admin shell standard, based on MinimalAppShell structure and ArtService identity. */
:root {
  --sidebar-width-expanded: 18rem;
  --sidebar-width-collapsed: 5.75rem;
  --sidebar-width: var(--sidebar-width-expanded);
  --topbar-height: 4.25rem;

  --app-font-sans: "Segoe UI", Arial, sans-serif;
  --app-space-1: 0.25rem;
  --app-space-2: 0.5rem;
  --app-space-3: 0.75rem;
  --app-space-4: 1rem;
  --app-space-5: 1.25rem;
  --app-space-6: 1.5rem;
  --app-radius-xs: 0.625rem;
  --app-radius-sm: 0.875rem;
  --app-radius-base: 1.125rem;
  --app-radius-lg: 1.35rem;
}

:root,
:root[data-bs-theme="light"],
[data-bs-theme="light"] {
  --app-bg: #f4f7fb;
  --app-bg-secondary: #eef3f8;
  --app-bg-tertiary: #e8eef6;
  --app-surface: rgba(255, 255, 255, 0.96);
  --app-surface-strong: #ffffff;
  --app-sidebar-bg: #f7f9fc;
  --app-topbar-bg: rgba(255, 255, 255, 0.82);

  --app-fg: #243242;
  --app-fg-muted: #7a8ca3;
  --app-fg-subtle: #a3b1c4;
  --app-border: #e2e8f0;
  --app-border-strong: #d5deea;

  --app-accent: #2f73d9;
  --app-accent-dark: #1e56aa;
  --app-accent-rgb: 47, 115, 217;
  --app-accent-foreground: #ffffff;
  --app-success: #15b79e;
  --app-success-rgb: 21, 183, 158;
  --app-warning: #f5b93f;
  --app-warning-rgb: 245, 185, 63;
  --app-danger: #f05d7d;
  --app-danger-rgb: 240, 93, 125;
  --app-info: #5d5fd6;
  --app-info-rgb: 93, 95, 214;

  --app-focus-ring: rgba(var(--app-accent-rgb), 0.22);
  --app-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.03), 0 12px 26px rgba(15, 23, 42, 0.06);
  --app-shadow-md: 0 1px 2px rgba(15, 23, 42, 0.05), 0 24px 56px rgba(15, 23, 42, 0.1);
}

:root[data-bs-theme="dark"],
[data-bs-theme="dark"] {
  --app-bg: #171821;
  --app-bg-secondary: #1f202a;
  --app-bg-tertiary: #262936;
  --app-surface: rgba(34, 36, 46, 0.96);
  --app-surface-strong: #242630;
  --app-sidebar-bg: #1d1f28;
  --app-topbar-bg: rgba(27, 29, 38, 0.88);

  --app-fg: #e7ebf3;
  --app-fg-muted: #97a0b6;
  --app-fg-subtle: #697288;
  --app-border: #313442;
  --app-border-strong: #3b3f4f;

  --app-accent: #5e94ff;
  --app-accent-dark: #8bb1ff;
  --app-accent-rgb: 94, 148, 255;
  --app-accent-foreground: #10131d;
  --app-success: #15b79e;
  --app-success-rgb: 21, 183, 158;
  --app-warning: #f5b93f;
  --app-warning-rgb: 245, 185, 63;
  --app-danger: #f05d7d;
  --app-danger-rgb: 240, 93, 125;
  --app-info: #8b8dff;
  --app-info-rgb: 139, 141, 255;

  --app-focus-ring: rgba(var(--app-accent-rgb), 0.24);
  --app-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.28), 0 14px 28px rgba(0, 0, 0, 0.22);
  --app-shadow-md: 0 1px 2px rgba(0, 0, 0, 0.34), 0 24px 56px rgba(0, 0, 0, 0.32);
}

body {
  font-family: var(--app-font-sans);
}

.app-frame {
  display: flex;
  min-height: 100vh;
  align-items: flex-start;
}

.app-frame .app-sidebar {
  position: sticky;
  top: 0;
  justify-content: flex-start;
  width: var(--sidebar-width);
  flex: 0 0 var(--sidebar-width);
  height: 100vh;
  max-height: 100vh;
  min-height: 0;
  overflow: hidden;
  background: var(--app-sidebar-bg);
  border-right: 1px solid var(--app-border);
  transition: width 0.22s ease, flex-basis 0.22s ease;
}

.app-frame .app-sidebar__body {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: stretch;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

.app-sidebar__nav-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-anchor: none;
  overscroll-behavior: contain;
  padding-right: 0.15rem;
}

.app-frame .app-sidebar__footer {
  flex: 0 0 auto;
}

.app-frame .app-main {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.app-topbar,
.topbar {
  position: sticky;
  top: 0;
  z-index: 1020;
  min-height: var(--topbar-height);
  padding: 0.7rem 1.25rem;
  background: var(--app-topbar-bg);
  backdrop-filter: blur(18px);
}

.app-content {
  flex: 1 1 auto;
  min-width: 0;
  padding: var(--app-space-6);
}

.app-nav,
.sidebar-nav {
  display: grid;
  gap: 0.42rem;
  align-content: start;
  justify-items: stretch;
  overflow-anchor: none;
}

.sidebar-submenu.collapse:not(.show) {
  display: none;
}

.sidebar-submenu.collapse.show,
.sidebar-submenu.collapsing {
  display: block;
}

.sidebar-submenu.collapsing {
  height: 0;
  overflow: hidden;
  transition: height 0.24s ease;
}

.sidebar-submenu {
  overflow-anchor: none;
}

.sidebar-submenu .sidebar-sublink + .sidebar-sublink {
  margin-top: 0.18rem;
}

.app-nav__button,
.sidebar-link,
.sidebar-group-toggle {
  justify-content: flex-start;
  min-height: 2.5rem;
  border-radius: var(--app-radius-sm);
}

.sidebar-group-toggle::after {
  margin-left: auto;
}

.app-nav__icon,
.sidebar-link__icon {
  font-size: 1.05rem;
  letter-spacing: 0;
}

.app-nav__icon i,
.sidebar-link__icon i {
  display: inline-flex;
  width: 1.05rem;
  height: 1.05rem;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  line-height: 1;
}

.app-card,
.page-header,
.content-card,
.dashboard-card {
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  background: var(--app-surface);
  box-shadow: var(--app-shadow-sm);
}

.app-btn,
.btn-action-primary,
.btn-action-secondary,
.btn.btn-primary,
.btn.btn-secondary {
  border-radius: var(--app-radius-sm);
  font-weight: 700;
}

.app-frame.is-sidebar-collapsed {
  --sidebar-width: var(--sidebar-width-collapsed);
}

.app-frame.is-sidebar-collapsed .brand-mark__copy,
.app-frame.is-sidebar-collapsed .sidebar-link__label,
.app-frame.is-sidebar-collapsed .sidebar-group-toggle::after,
.app-frame.is-sidebar-collapsed .sidebar-submenu,
.app-frame.is-sidebar-collapsed .status-pill {
  display: none;
}

.app-frame.is-sidebar-collapsed .sidebar-header {
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

.app-frame.is-sidebar-collapsed .sidebar-link,
.app-frame.is-sidebar-collapsed .sidebar-group-toggle {
  justify-content: center;
  gap: 0;
  padding-inline: 0;
}

.app-frame.is-sidebar-collapsed .sidebar-link.is-active::before {
  left: 50%;
  top: auto;
  bottom: 0.25rem;
  width: 1.1rem;
  height: 0.2rem;
  transform: translateX(-50%);
}

@media (max-width: 991.98px) {
  .app-frame {
    display: block;
  }

  .app-frame .app-sidebar {
    position: static;
    width: auto;
    flex-basis: auto;
    height: auto;
    max-height: none;
    min-height: auto;
    overflow: visible;
  }

  .app-frame .app-sidebar__body {
    overflow: visible;
  }

  .app-sidebar__nav-scroll {
    overflow: visible;
    padding-right: 0;
  }

  .app-content {
    padding: 1rem;
  }

  .app-topbar,
  .topbar {
    padding-inline: 1rem;
  }
}