.app-shell {
  min-height: 100vh;
}

.topbar {
  align-items: center;
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  background: rgba(255, 255, 255, 0.76);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 26px rgba(15, 23, 42, 0.045);
  display: grid;
  gap: 12px;
  grid-template-columns: auto minmax(160px, 260px) minmax(0, 1fr) auto;
  height: var(--topbar-height);
  left: 0;
  padding: 0 18px;
  position: sticky;
  right: 0;
  top: 0;
  z-index: 20;
}

.brand {
  align-items: center;
  display: flex;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-mark {
  align-items: center;
  background: var(--primary);
  border-radius: 9px;
  color: #fff;
  display: inline-flex;
  height: 32px;
  justify-content: center;
  width: 32px;
}

.topbar-status {
  align-items: center;
  display: flex;
  gap: 8px;
  min-width: 0;
  overflow: hidden;
}

.topbar-actions {
  align-items: center;
  display: flex;
  gap: 8px;
  white-space: nowrap;
}

.body-grid {
  display: grid;
  grid-template-columns: var(--sidebar-width-collapsed) minmax(0, 1fr);
  min-height: calc(100vh - var(--topbar-height));
}

.body-grid.sidebar-expanded {
  grid-template-columns: var(--sidebar-width-expanded) minmax(0, 1fr);
}

.sidebar {
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  background: rgba(255, 255, 255, 0.72);
  border-right: 1px solid var(--border);
  height: calc(100vh - var(--topbar-height));
  overflow: visible;
  padding: 12px 8px;
  position: sticky;
  top: var(--topbar-height);
  z-index: 15;
}

.nav-list {
  display: grid;
  gap: 8px;
}

.nav-toggle,
.nav-item {
  position: relative;
}

.nav-item {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 12px;
  color: var(--text-secondary);
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
  height: 44px;
  justify-items: center;
  padding: 0;
  text-align: left;
  width: 100%;
}

.nav-toggle {
  align-items: center;
  background: rgba(255, 255, 255, 0.48);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-secondary);
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
  height: 42px;
  justify-items: center;
  margin-bottom: 12px;
  padding: 0;
  width: 100%;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.62);
  color: var(--text-main);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.82);
  border-color: var(--border-strong);
  color: var(--text-main);
}

.nav-item.active {
  background: rgba(219, 234, 254, 0.78);
  color: var(--primary);
  font-weight: 650;
}

.nav-item.active::before {
  background: var(--primary);
  border-radius: 999px;
  content: "";
  height: 20px;
  left: -8px;
  position: absolute;
  top: 12px;
  width: 3px;
}

.nav-icon {
  align-items: center;
  display: inline-flex;
  height: 22px;
  justify-content: center;
  width: 22px;
}

.nav-icon svg {
  fill: none;
  height: 21px;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  width: 21px;
}

.nav-label {
  display: none;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar.expanded .nav-item,
.sidebar.expanded .nav-toggle {
  grid-template-columns: 26px minmax(0, 1fr);
  justify-items: start;
  padding: 0 12px;
}

.sidebar.expanded .nav-label {
  display: inline;
}

.sidebar.collapsed .nav-item::after,
.sidebar.collapsed .nav-toggle::after {
  background: #111827;
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.18);
  color: #fff;
  content: attr(data-tooltip);
  font-size: 12px;
  font-weight: 650;
  left: calc(100% + 10px);
  line-height: 1;
  opacity: 0;
  padding: 8px 9px;
  pointer-events: none;
  position: absolute;
  top: 50%;
  transform: translate(-4px, -50%);
  transition: opacity 120ms ease, transform 120ms ease;
  white-space: nowrap;
  z-index: 200;
}

.sidebar.collapsed .nav-item:hover::after,
.sidebar.collapsed .nav-toggle:hover::after,
.sidebar.collapsed .nav-item:focus-visible::after,
.sidebar.collapsed .nav-toggle:focus-visible::after {
  opacity: 1;
  transform: translate(0, -50%);
}

.main {
  min-width: 0;
  padding: 20px 24px 36px;
}

.page-head {
  align-items: flex-start;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 16px;
}

.page-title {
  margin: 0;
  font-size: 21px;
  letter-spacing: 0;
  line-height: 1.25;
}

.page-desc {
  color: var(--text-secondary);
  margin: 5px 0 0;
}

.page-actions,
.toolbar {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.split {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
}

.split.wide-left {
  grid-template-columns: minmax(0, 1.45fr) minmax(360px, 0.65fr);
}

.section-stack {
  display: grid;
  gap: 16px;
}

@media (max-width: 1100px) {
  .topbar {
    grid-template-columns: minmax(180px, 1fr) minmax(150px, 220px);
    height: auto;
    min-height: var(--topbar-height);
    padding: 10px 14px;
  }

  .topbar-status,
  .topbar-actions {
    grid-column: 1 / -1;
  }

  .topbar-actions {
    min-width: 0;
    flex-wrap: wrap;
  }

  .body-grid,
  .body-grid.sidebar-expanded {
    grid-template-columns: var(--sidebar-width-collapsed) minmax(0, 1fr);
  }

  .sidebar {
    padding: 12px 8px;
  }

  .sidebar.expanded .nav-item,
  .sidebar.expanded .nav-toggle,
  .nav-item,
  .nav-toggle {
    grid-template-columns: 1fr;
    justify-items: center;
    padding: 0;
  }

  .nav-label {
    display: none;
  }

  .grid.four,
  .grid.three,
  .grid.two,
  .split,
  .split.wide-left {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .topbar {
    grid-template-columns: minmax(0, 1fr) minmax(120px, 1fr);
  }

  .page-head {
    flex-direction: column;
  }
}