/* App shell + auth layout glue. Not a reusable primitive; these
   classes are owned by carousel-poster.app and the auth pages. */

.app-shell {
  display: flex;
  min-height: 100vh;
  align-items: stretch;
}

.app-shell__main {
  flex: 1;
  min-width: 0;
  max-width: var(--container-max-app);
  width: 100%;
  padding: var(--space-12) var(--container-padding);
  margin: 0 auto;
}

/* Mobile topbar - hidden on desktop, becomes a 56px sticky bar below 860px. */
.app-shell__topbar {
  display: none;
  position: sticky;
  top: 0;
  z-index: var(--z-overlay);
  height: 56px;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-3);
  background: var(--color-bg-surface);
  border-bottom: var(--border-width) solid var(--color-border);
}

.app-shell__topbar-trigger {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--color-text);
  cursor: pointer;
}

.app-shell__topbar-trigger:hover {
  color: var(--color-accent);
}

.app-shell__topbar-wordmark {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  text-transform: uppercase;
  color: var(--color-text);
}

.app-shell__topbar-spacer {
  width: 40px;
}

.app-shell__backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: var(--color-backdrop-drawer);
}

@media (max-width: 860px) {
  .app-shell {
    flex-direction: column;
  }

  .app-shell__topbar {
    display: flex;
  }

  .app-shell .sidebar {
    position: fixed;
    top: 0;
    left: -240px;
    height: 100vh;
    z-index: var(--z-modal);
    transition: left var(--duration-base) var(--ease-out);
  }

  .app-shell--drawer-open .sidebar {
    left: 0;
  }

  .app-shell--drawer-open .app-shell__backdrop {
    display: block;
  }

  .app-shell__main {
    padding: var(--space-6) var(--space-3);
  }
}

.app-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

/* Auth pages (login, signup) - centered card on page background. */

.auth-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  gap: var(--space-6);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  padding: var(--space-10);
}

.auth-card__title {
  font-family: var(--font-sans);
  font-weight: var(--weight-bold);
  font-size: var(--text-4xl);
  letter-spacing: var(--tracking-tight);
  margin: var(--space-2) 0 var(--space-8);
  line-height: var(--leading-tight);
}

.auth-card__muted {
  color: var(--color-text-muted);
  margin: 0 0 var(--space-8);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.auth-form__submit {
  width: 100%;
  justify-content: center;
}

.auth-layout__alt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
  margin: 0;
}

.auth-layout__link {
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
  border-bottom: 1px solid var(--color-border);
}

.auth-layout__link:hover {
  border-bottom-color: var(--color-accent);
  color: var(--color-accent);
}