.auth-preview-panel {
  position: fixed;
  top: 5.25rem;
  right: 1rem;
  z-index: 2100;
  width: min(22rem, calc(100vw - 2rem));
  padding: 0.8rem;
  border: 1px solid rgba(0, 243, 255, 0.5);
  border-radius: 10px;
  background: rgba(4, 6, 12, 0.96);
  box-shadow: 0 0 24px rgba(0, 243, 255, 0.18);
  color: var(--text-main, #f1f5f9);
  font-family: var(--font-main, sans-serif);
}

.auth-preview-panel[hidden] {
  display: none;
}

/* Full-page login surface on the platform shell homepage (signed-out session).
   The doubled selector keeps full-viewport layout even against the base panel
   and the mobile media-query overrides; the existing panel background carries over. */
.auth-preview-panel.auth-preview-panel--gate {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 100000;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.auth-preview-panel.auth-preview-panel--gate[hidden] {
  display: none;
}

.auth-preview-panel h2 {
  margin: 0;
  color: var(--neon-cyan, #00f3ff);
  font-family: var(--font-heading, sans-serif);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.auth-preview-state,
.auth-preview-status {
  margin: 0.35rem 0;
  font-size: 0.8rem;
}

.auth-preview-status {
  min-height: 1.1rem;
  color: var(--text-muted, #a8b2c1);
}

.auth-preview-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.auth-preview-controls form {
  display: contents;
}

.auth-preview-controls button {
  min-height: 2.25rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid rgba(0, 243, 255, 0.45);
  border-radius: 6px;
  background: rgba(0, 243, 255, 0.08);
  color: inherit;
  font: 600 0.72rem var(--font-code, monospace);
  cursor: pointer;
}

.auth-preview-controls button:hover:not(:disabled) {
  background: rgba(0, 243, 255, 0.16);
}

.auth-preview-controls button:focus-visible {
  outline: 3px solid var(--neon-cyan, #00f3ff);
  outline-offset: 2px;
}

.auth-preview-controls button:disabled {
  cursor: wait;
  opacity: 0.55;
}

@media (max-width: 640px) {
  .auth-preview-panel {
    top: auto;
    right: 0.5rem;
    bottom: 0.5rem;
    left: 0.5rem;
    width: auto;
  }

  .auth-preview-controls button {
    flex: 1 1 8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .auth-preview-panel * {
    scroll-behavior: auto;
  }
}