/* App shell layout */
.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  background: var(--bg-color, var(--bg));
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px var(--page-gutter, 16px);
  background: var(--surface-l0, var(--bg));
  border-bottom: 1px solid var(--border-subtle, var(--border));
  position: sticky;
  top: 0;
  z-index: 40;
}

.app-main {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.view-header {
  margin-bottom: 16px;
}

.view-header h1 {
  margin: 0 0 4px;
  font-size: 1.35rem;
}

.content-nav-clearance {
  padding-bottom: calc(var(--nav-h, 64px) + var(--nav-float-gap, 18px) * 2 + env(safe-area-inset-bottom, 0px));
}