/* App-shell layout for the F# Elmish UI. Pure @argentum/ui tokens — no hardcoded values. */

.ag-shell {
  display: flex;
  flex-direction: column;
  min-block-size: 100vh;
}

.ag-shell__header {
  position: sticky;
  top: 0;
  z-index: var(--ag-z-sticky);
  display: flex;
  align-items: center;
  gap: var(--ag-space-4);
  padding: var(--ag-space-3) var(--ag-space-5);
  background: color-mix(in srgb, var(--ag-surface) 88%, transparent);
  backdrop-filter: blur(8px);
  border-block-end: 1px solid var(--ag-border);
}

.ag-shell__brand {
  font-weight: var(--ag-weight-bold);
  font-size: var(--ag-text-lg);
  letter-spacing: var(--ag-tracking-tight);
  color: var(--ag-text);
}

.ag-shell__nav {
  display: flex;
  flex: 1;
  gap: var(--ag-space-4);
}

.ag-shell__navlink {
  font-size: var(--ag-text-sm);
}

.ag-shell__main {
  flex: 1;
  padding: var(--ag-space-6);
}

.ag-shell__placeholder {
  max-inline-size: 42rem;
  margin-inline: auto;
}

.ag-shell__hint {
  color: var(--ag-text-muted);
}

/* Auth screen: a centered card over a subtle accent-tinted backdrop. */
.ag-auth {
  display: flex;
  align-items: center;
  justify-content: center;
  min-block-size: 100vh;
  padding: var(--ag-space-4);
  background: radial-gradient(
    circle at 50% 0%,
    color-mix(in srgb, var(--ag-accent) 12%, var(--ag-bg)),
    var(--ag-bg) 70%
  );
}

.ag-auth__card {
  display: flex;
  flex-direction: column;
  gap: var(--ag-space-4);
  inline-size: 100%;
  max-inline-size: 22rem;
  padding: var(--ag-space-6);
  background: var(--ag-surface);
  border: 1px solid var(--ag-border);
  border-radius: var(--ag-radius-lg);
  box-shadow: var(--ag-shadow-lg);
}

.ag-auth__brand {
  align-self: center;
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: 3rem;
  block-size: 3rem;
  border-radius: var(--ag-radius-full);
  background: var(--ag-gradient-accent);
  color: var(--ag-accent-contrast);
  font-weight: var(--ag-weight-bold);
  font-size: var(--ag-text-lg);
}

.ag-auth__hint {
  margin: 0;
  color: var(--ag-text-muted);
  font-size: var(--ag-text-sm);
}