:root {
  --admin-sidebar-width: 296px;
  --admin-sidebar-width-collapsed: 88px;
  --admin-gap: 20px;
  --admin-radius: 24px;
  --admin-border: rgba(255, 255, 255, 0.1);
  --admin-surface: rgba(17, 24, 39, 0.72);
  --admin-surface-soft: rgba(255, 255, 255, 0.04);
  --admin-shadow: 0 24px 48px rgba(0, 0, 0, 0.28);
  --admin-header-height: 80px;
  --admin-sidebar-transition-ms: 180ms;
  --admin-sidebar-content-transition-ms: 120ms;
}

body.admin-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.admin-page .app-site-header {
  flex: 0 0 auto;
}

.admin-shell {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: grid;
  grid-template-columns: var(--admin-sidebar-width) minmax(0, 1fr);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent 30%),
    radial-gradient(circle at bottom right, rgba(168, 85, 247, 0.12), transparent 26%),
    linear-gradient(180deg, rgba(15, 23, 42, 0.96), rgba(2, 6, 23, 0.98));
  color: #f8fafc;
  transition: grid-template-columns var(--admin-sidebar-transition-ms) ease;
}

.admin-sidebar {
  position: relative;
  min-width: 0;
  height: calc(100vh - var(--header-height));
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--admin-border);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.8));
  overflow: visible;
  transition: width var(--admin-sidebar-transition-ms) ease, border-color var(--admin-sidebar-transition-ms) ease;
}

.admin-sidebar__header {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--admin-header-height);
  padding: 20px 18px;
  border-bottom: 1px solid var(--admin-border);
  flex-shrink: 0;
}

.admin-sidebar__brand {
  min-width: 0;
  flex: 1;
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  pointer-events: auto;
  transition:
    opacity var(--admin-sidebar-content-transition-ms) ease,
    transform var(--admin-sidebar-content-transition-ms) ease,
    visibility 0s linear;
}

.admin-sidebar__title {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.admin-sidebar__subtitle {
  margin-top: 4px;
  color: rgba(226, 232, 240, 0.68);
  font-size: 0.78rem;
}

.admin-sidebar__subtitle[hidden] {
  display: none;
}

.admin-sidebar__toggle {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease,
    opacity var(--admin-sidebar-content-transition-ms) ease,
    visibility 0s linear;
}

.admin-sidebar__toggle:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(148, 163, 184, 0.28);
}

.admin-sidebar__toggle span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  line-height: 1;
  font-weight: 700;
}

.admin-sidebar__scroll {
  min-height: 0;
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 18px 14px 20px;
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  pointer-events: auto;
  transition:
    opacity var(--admin-sidebar-content-transition-ms) ease,
    transform var(--admin-sidebar-content-transition-ms) ease,
    visibility 0s linear;
}

.admin-sidebar__nav {
  display: grid;
  gap: 8px;
}

.admin-sidebar__link {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 52px;
  padding: 12px 14px;
  border-radius: 18px;
  color: inherit;
  text-decoration: none;
  background: transparent;
  transition: background-color 160ms ease, transform 160ms ease, border-color 160ms ease;
  border: 1px solid transparent;
}

.admin-sidebar__link:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.06);
}

.admin-sidebar__link.is-active {
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.24), rgba(59, 130, 246, 0.16));
  border-color: rgba(96, 165, 250, 0.36);
  box-shadow: inset 0 0 0 1px rgba(125, 211, 252, 0.18);
}

.admin-sidebar__icon {
  width: 22px;
  text-align: center;
  font-size: 1rem;
  flex-shrink: 0;
  opacity: 0.92;
}

.admin-sidebar__label {
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 0.96rem;
}

.admin-sidebar__footer {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--admin-border);
  color: rgba(226, 232, 240, 0.62);
  font-size: 0.76rem;
  flex-shrink: 0;
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  pointer-events: auto;
  transition:
    opacity var(--admin-sidebar-content-transition-ms) ease,
    transform var(--admin-sidebar-content-transition-ms) ease,
    visibility 0s linear;
}

.admin-sidebar.is-content-hidden:not(.is-collapsed) .admin-sidebar__brand,
.admin-sidebar.is-content-hidden:not(.is-collapsed) .admin-sidebar__scroll,
.admin-sidebar.is-content-hidden:not(.is-collapsed) .admin-sidebar__footer,
.admin-sidebar.is-content-hidden:not(.is-collapsed) .admin-sidebar__toggle {
  opacity: 0;
  visibility: hidden;
  transform: translateX(-8px);
  pointer-events: none;
}

.admin-sidebar.is-collapsed {
  overflow: hidden;
}

.admin-shell__main {
  min-width: 0;
  height: calc(100vh - var(--header-height));
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.admin-topbar {
  min-height: var(--admin-header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 28px;
  border-bottom: 1px solid var(--admin-border);
  backdrop-filter: blur(18px);
  background: rgba(15, 23, 42, 0.42);
  flex-shrink: 0;
}

.admin-topbar__title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.admin-topbar__description {
  margin-top: 6px;
  color: rgba(226, 232, 240, 0.68);
  font-size: 0.9rem;
}

.admin-topbar__meta {
  text-align: right;
}

.admin-topbar__meta-label {
  color: rgba(226, 232, 240, 0.62);
  font-size: 0.78rem;
}

.admin-topbar__meta-value {
  margin-top: 6px;
  font-size: 0.96rem;
  font-weight: 600;
}

.admin-main-scroll {
  min-height: 0;
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 22px 28px 30px;
}

.admin-state-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent 30%),
    radial-gradient(circle at bottom right, rgba(168, 85, 247, 0.12), transparent 26%),
    linear-gradient(180deg, rgba(15, 23, 42, 0.96), rgba(2, 6, 23, 0.98));
}

.admin-state-card {
  width: min(100%, 540px);
  padding: 28px;
  border-radius: 28px;
  border: 1px solid var(--admin-border);
  background: var(--admin-surface);
  box-shadow: var(--admin-shadow);
  text-align: center;
}

.admin-state-card__title {
  font-size: 1.25rem;
  font-weight: 700;
}

.admin-state-card__description {
  margin-top: 14px;
  color: rgba(226, 232, 240, 0.75);
  line-height: 1.7;
}

.admin-state-card__actions {
  margin-top: 22px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.admin-page-grid {
  display: grid;
  gap: 20px;
}

.admin-page-grid--dashboard {
  grid-template-columns: 1.4fr 1fr;
  align-items: stretch;
}

.admin-panel {
  border-radius: var(--admin-radius);
  border: 1px solid var(--admin-border);
  background: var(--admin-surface);
  box-shadow: var(--admin-shadow);
  padding: 22px;
}

.admin-panel--soft {
  background: rgba(255, 255, 255, 0.04);
}

.admin-panel__title {
  font-size: 1rem;
  font-weight: 700;
}

.admin-panel__meta {
  margin-top: 8px;
  color: rgba(226, 232, 240, 0.68);
  font-size: 0.88rem;
  line-height: 1.7;
}

.admin-panel__placeholder {
  margin-top: 18px;
  min-height: 180px;
  border-radius: 18px;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  display: grid;
  place-items: center;
  color: rgba(226, 232, 240, 0.58);
  background: rgba(255, 255, 255, 0.02);
}

.admin-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 20px;
}

.admin-form-actions--sticky {
  position: sticky;
  bottom: 0;
  padding-top: 20px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0), rgba(15, 23, 42, 0.92) 28%);
}

.admin-shell .app-global-close {
  z-index: 2000;
}

.admin-shell .app-modal-dialog {
  max-width: 520px;
}

.admin-shell.is-sidebar-collapsed {
  grid-template-columns: 0 minmax(0, 1fr);
}

.admin-shell.is-sidebar-collapsed .admin-sidebar {
  width: 0;
  border-right-color: transparent;
}

.admin-shell.is-sidebar-collapsed .admin-sidebar__header {
  min-height: 0;
  padding: 0;
  border-bottom: none;
}

.admin-shell.is-sidebar-collapsed .admin-sidebar__brand,
.admin-shell.is-sidebar-collapsed .admin-sidebar__scroll,
.admin-shell.is-sidebar-collapsed .admin-sidebar__footer {
  opacity: 0;
  pointer-events: none;
}

.admin-shell.is-sidebar-collapsed .admin-sidebar__toggle {
  position: fixed;
  top: calc(var(--header-height) + 18px);
  left: 0;
  width: 30px;
  height: 72px;
  padding: 0;
  border-radius: 0 999px 999px 0;
  border: 1px solid rgba(148, 163, 184, 0.24);
  background:
    linear-gradient(180deg, rgba(30, 41, 59, 0.98), rgba(15, 23, 42, 0.96));
  box-shadow:
    0 18px 42px rgba(0, 0, 0, 0.34),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transform: translateX(-12px);
  opacity: 0;
  pointer-events: none;
  z-index: 70;
}

.admin-shell.is-sidebar-collapsed .admin-sidebar__toggle span {
  font-size: 0.96rem;
  transform: translateX(1px);
}

.admin-shell.is-sidebar-collapsed.is-sidebar-edge-peek .admin-sidebar__toggle,
.admin-shell.is-sidebar-collapsed .admin-sidebar__toggle:focus-visible {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 1024px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    height: auto;
    max-height: 220px;
    border-right: none;
    border-bottom: 1px solid var(--admin-border);
  }

  .admin-shell.is-sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .admin-shell.is-sidebar-collapsed .admin-sidebar {
    width: 100%;
    max-height: 0;
  }

  .admin-page-grid--dashboard {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .admin-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .admin-topbar__meta {
    text-align: left;
  }

  .admin-main-scroll {
    padding: 20px;
  }

  .admin-panel {
    padding: 18px;
  }
}

@media (max-width: 960px) {
  .admin-shell {
    min-height: calc(100vh - 112px);
  }

  .admin-sidebar {
    height: auto;
  }

  .admin-shell__main {
    height: auto;
    min-height: calc(100vh - 112px);
  }

  .admin-shell.is-sidebar-collapsed .admin-sidebar__toggle {
    top: 128px;
  }
}