/* kdg-auth-error — compact premium notice block for auth flows.
   Surfaces form-validation problems, security gates, and recovery hints
   inside the auth card. BEM with kdg- prefix; tier variants drive color.
   The block reads as a tinted surface — never a bordered alert. */

/* --- Shell ---------------------------------------------------------- */
.kdg-auth-error {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--kdg-space-3);
  padding: var(--kdg-space-3) var(--kdg-space-4);
  background: var(--kdg-auth-error-bg, var(--kdg-color-state-neutral-soft));
  border: 1px solid var(--kdg-auth-error-border, var(--kdg-color-border-strong));
  border-radius: var(--kdg-radius-md);
  font-family: var(--kdg-font-family-sans);
  color: var(--kdg-color-text-primary);
  overflow: hidden;
  isolation: isolate;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset,
              0 1px 2px rgba(15, 17, 21, 0.04);
  animation: kdg-auth-error-in var(--kdg-duration-slow) cubic-bezier(0.16, 1, 0.3, 1);
}
/* Subtle vertical gradient — denser tint at the top, fading toward the
   bottom edge for a refined glassy depth without screaming "alert". */
.kdg-auth-error::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg,
              rgba(255, 255, 255, 0.4) 0%,
              rgba(255, 255, 255, 0)    70%);
  z-index: 0;
}
.kdg-auth-error > * { position: relative; z-index: 1; }

/* --- Icon chip ------------------------------------------------------ */
.kdg-auth-error__icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-top: 1px;
  border-radius: 9px;
  background: var(--kdg-auth-error-icon-bg, var(--kdg-color-state-neutral));
  color: var(--kdg-auth-error-icon-fg, var(--kdg-color-text-inverse));
  box-shadow: 0 1px 2px rgba(15, 17, 21, 0.18),
              0 0 0 1px rgba(15, 17, 21, 0.04) inset;
}
.kdg-auth-error__icon i {
  font-size: 18px;
  line-height: 1;
  color: var(--kdg-auth-error-icon-fg, var(--kdg-color-text-inverse));
}

/* --- Body ----------------------------------------------------------- */
.kdg-auth-error__body {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 1px;
}
.kdg-auth-error__title {
  margin: 0;
  font-size: var(--kdg-font-size-md);
  font-weight: var(--kdg-font-weight-semibold);
  line-height: var(--kdg-line-height-snug);
  letter-spacing: -0.005em;
  color: var(--kdg-color-text-primary);
}
.kdg-auth-error__message {
  margin: 0;
  font-size: var(--kdg-font-size-sm);
  font-weight: var(--kdg-font-weight-regular);
  line-height: var(--kdg-line-height-base);
  color: var(--kdg-color-text-secondary);
  word-wrap: break-word;
}
.kdg-auth-error__message a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: rgba(15, 17, 21, 0.2);
  text-underline-offset: 2px;
  transition: text-decoration-color var(--kdg-t-fast);
}
.kdg-auth-error__message a:hover {
  text-decoration-color: currentColor;
}

/* --- Actions -------------------------------------------------------- */
.kdg-auth-error__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--kdg-space-2);
  margin-top: var(--kdg-space-2);
}
.kdg-auth-error__action {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 var(--kdg-space-3);
  height: 28px;
  font-family: var(--kdg-font-family-sans);
  font-size: var(--kdg-font-size-xs);
  font-weight: var(--kdg-font-weight-semibold);
  letter-spacing: -0.003em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  color: var(--kdg-auth-error-accent, var(--kdg-color-text-primary));
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--kdg-auth-error-accent-border, var(--kdg-color-border-strong));
  border-radius: var(--kdg-radius-sm);
  cursor: pointer;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: background var(--kdg-t-fast),
              border-color var(--kdg-t-fast),
              color var(--kdg-t-fast),
              transform var(--kdg-t-fast);
}
.kdg-auth-error__action i {
  font-size: 12px;
  line-height: 1;
  display: inline-block;
  transition: transform var(--kdg-t-fast);
}
.kdg-auth-error__action:hover {
  background: var(--kdg-auth-error-accent-bg-hover, var(--kdg-color-surface));
  border-color: var(--kdg-auth-error-accent, var(--kdg-color-text-tertiary));
  color: var(--kdg-auth-error-accent, var(--kdg-color-text-primary));
}
.kdg-auth-error__action:hover i {
  transform: translateX(1px);
}
.kdg-auth-error__action:focus-visible {
  outline: none;
  box-shadow: var(--kdg-shadow-focus-ring);
}
.kdg-auth-error__action:active {
  transform: translateY(0.5px);
}

/* --- Close affordance ---------------------------------------------- */
.kdg-auth-error__close {
  flex-shrink: 0;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin: -2px -4px 0 0;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: var(--kdg-radius-sm);
  color: var(--kdg-color-text-tertiary);
  cursor: pointer;
  transition: background var(--kdg-t-fast),
              color var(--kdg-t-fast);
}
.kdg-auth-error__close i {
  font-size: 14px;
  line-height: 1;
}
.kdg-auth-error__close:hover {
  background: rgba(15, 17, 21, 0.06);
  color: var(--kdg-color-text-primary);
}
.kdg-auth-error__close:focus-visible {
  outline: none;
  box-shadow: var(--kdg-shadow-focus-ring);
}

/* --- Dev diagnostic chip ------------------------------------------- */
.kdg-auth-error__dev {
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 4px;
  padding: 2px 6px;
  font-family: var(--kdg-font-family-mono);
  font-size: 10px;
  font-weight: var(--kdg-font-weight-medium);
  color: var(--kdg-color-text-tertiary);
  background: rgba(255, 255, 255, 0.6);
  border: 1px dashed var(--kdg-color-border-strong);
  border-radius: var(--kdg-radius-xs);
  text-transform: lowercase;
  letter-spacing: 0;
  white-space: nowrap;
}

/* --- Tier variants -------------------------------------------------- */
/* Default (untiered) = neutral */
.kdg-auth-error {
  --kdg-auth-error-bg:               var(--kdg-color-state-neutral-soft);
  --kdg-auth-error-border:           var(--kdg-color-border-strong);
  --kdg-auth-error-icon-bg:          var(--kdg-color-state-neutral);
  --kdg-auth-error-icon-fg:          var(--kdg-color-text-inverse);
  --kdg-auth-error-accent:           var(--kdg-color-text-primary);
  --kdg-auth-error-accent-border:    var(--kdg-color-border-strong);
  --kdg-auth-error-accent-bg-hover:  var(--kdg-color-surface);
}

.kdg-auth-error--hint {
  --kdg-auth-error-bg:               var(--kdg-color-state-warning-soft);
  --kdg-auth-error-border:           rgba(185, 116, 0, 0.28);
  --kdg-auth-error-icon-bg:          var(--kdg-color-state-warning);
  --kdg-auth-error-icon-fg:          #ffffff;
  --kdg-auth-error-accent:           var(--kdg-color-state-warning);
  --kdg-auth-error-accent-border:    rgba(185, 116, 0, 0.32);
  --kdg-auth-error-accent-bg-hover:  #ffffff;
}

.kdg-auth-error--try-again {
  --kdg-auth-error-bg:               var(--kdg-color-state-warning-soft);
  --kdg-auth-error-border:           rgba(185, 116, 0, 0.28);
  --kdg-auth-error-icon-bg:          var(--kdg-color-state-warning);
  --kdg-auth-error-icon-fg:          #ffffff;
  --kdg-auth-error-accent:           var(--kdg-color-state-warning);
  --kdg-auth-error-accent-border:    rgba(185, 116, 0, 0.32);
  --kdg-auth-error-accent-bg-hover:  #ffffff;
}

.kdg-auth-error--info {
  --kdg-auth-error-bg:               var(--kdg-color-state-info-soft);
  --kdg-auth-error-border:           rgba(31, 111, 235, 0.25);
  --kdg-auth-error-icon-bg:          var(--kdg-color-state-info);
  --kdg-auth-error-icon-fg:          #ffffff;
  --kdg-auth-error-accent:           var(--kdg-color-state-info);
  --kdg-auth-error-accent-border:    rgba(31, 111, 235, 0.28);
  --kdg-auth-error-accent-bg-hover:  #ffffff;
}

.kdg-auth-error--problem {
  --kdg-auth-error-bg:               var(--kdg-color-state-danger-soft);
  --kdg-auth-error-border:           rgba(217, 48, 37, 0.28);
  --kdg-auth-error-icon-bg:          var(--kdg-color-state-danger);
  --kdg-auth-error-icon-fg:          #ffffff;
  --kdg-auth-error-accent:           var(--kdg-color-state-danger);
  --kdg-auth-error-accent-border:    rgba(217, 48, 37, 0.32);
  --kdg-auth-error-accent-bg-hover:  #ffffff;
}

.kdg-auth-error--system {
  --kdg-auth-error-bg:               var(--kdg-color-state-danger-soft);
  --kdg-auth-error-border:           rgba(217, 48, 37, 0.28);
  --kdg-auth-error-icon-bg:          var(--kdg-color-state-danger);
  --kdg-auth-error-icon-fg:          #ffffff;
  --kdg-auth-error-accent:           var(--kdg-color-state-danger);
  --kdg-auth-error-accent-border:    rgba(217, 48, 37, 0.32);
  --kdg-auth-error-accent-bg-hover:  #ffffff;
}

/* --- Compact variant (no message body) ----------------------------- */
.kdg-auth-error--compact {
  padding-top: var(--kdg-space-2);
  padding-bottom: var(--kdg-space-2);
}
.kdg-auth-error--compact .kdg-auth-error__body { gap: 0; }

/* --- Dense variant for stacked error lists ------------------------- */
.kdg-auth-error--dense {
  padding: var(--kdg-space-2) var(--kdg-space-3);
  gap: var(--kdg-space-2);
}
.kdg-auth-error--dense .kdg-auth-error__icon {
  width: 24px;
  height: 24px;
  border-radius: 6px;
}
.kdg-auth-error--dense .kdg-auth-error__icon i { font-size: 14px; }
.kdg-auth-error--dense .kdg-auth-error__title {
  font-size: var(--kdg-font-size-sm);
}
.kdg-auth-error--dense .kdg-auth-error__message {
  font-size: var(--kdg-font-size-xs);
}

/* --- Entry / exit animations --------------------------------------- */
@keyframes kdg-auth-error-in {
  from {
    opacity: 0;
    transform: translateY(-6px) scale(0.985);
    filter: blur(2px);
  }
  60% {
    filter: blur(0);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}
@keyframes kdg-auth-error-out {
  from { opacity: 1; transform: translateY(0); max-height: 200px; padding-top: var(--kdg-space-3); padding-bottom: var(--kdg-space-3); margin-top: 0; }
  to   { opacity: 0; transform: translateY(-4px); max-height: 0; padding-top: 0; padding-bottom: 0; margin-top: 0; }
}
.kdg-auth-error--leaving {
  animation: kdg-auth-error-out var(--kdg-duration-base) var(--kdg-ease-in) forwards;
  pointer-events: none;
}

/* --- Mobile --------------------------------------------------------- */
@media (max-width: 480px) {
  .kdg-auth-error {
    padding: var(--kdg-space-3);
    gap: var(--kdg-space-3);
  }
  .kdg-auth-error__icon { width: 28px; height: 28px; border-radius: 8px; }
  .kdg-auth-error__icon i { font-size: 16px; }
  .kdg-auth-error__title { font-size: var(--kdg-font-size-sm); }
  .kdg-auth-error__message { font-size: var(--kdg-font-size-xs); }
}

/* --- Reduced motion ------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .kdg-auth-error { animation: none; }
  .kdg-auth-error--leaving { animation: none; opacity: 0; }
  .kdg-auth-error__action i { transition: none; }
}