/**
 * Zone 1 bell — click opens slide-down panel (sheet on mobile).
 * Palette: design-tokens.css only.
 */

html.app-alerts-open .app-header {
  z-index: 225;
}

.app-header__alerts {
  position: relative;
  flex-shrink: 0;
}

.app-header__alerts-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  font: inherit;
  padding: 0;
}

.app-header__alerts.is-open .app-header__alerts-btn {
  background: var(--header-hover-bg);
}

.app-header__alerts-btn:focus-visible {
  outline: 2px solid var(--input-focus-border);
  outline-offset: 2px;
}

/* Backdrop sits below header + dropdown (header bumps to 225 when open) */
.app-header-alerts-backdrop {
  position: fixed;
  inset: 0;
  top: calc(var(--app-header-height) + env(safe-area-inset-top, 0px));
  z-index: 210;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  background: var(--backdrop-bg);
}

.app-header-alerts-backdrop[hidden] {
  display: none !important;
}

body.has-verification-banner .app-header-alerts-backdrop {
  top: calc(
    var(--app-header-height) + env(safe-area-inset-top, 0px) + var(--site-banner-height, 50px)
  );
}

/* Dropdown above backdrop (within raised header stacking context) */
.app-header-alerts-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  z-index: 2;
  width: min(22rem, calc(100vw - 1.5rem));
  padding-top: 4px;
  visibility: hidden;
  pointer-events: none;
}

.app-header-alerts-dropdown[hidden] {
  display: none !important;
}

.app-header-alerts-dropdown__inner {
  transform: translateY(-14px);
  opacity: 0;
  transition:
    transform var(--dropdown-glide-duration) var(--dropdown-glide-ease),
    opacity 0.22s ease;
  will-change: transform, opacity;
}

.app-header__alerts.is-open .app-header-alerts-dropdown {
  visibility: visible;
  pointer-events: auto;
}

.app-header__alerts.is-open .app-header-alerts-dropdown__inner {
  transform: translateY(0);
  opacity: 1;
}

.app-header-alerts-panel {
  width: 100%;
  max-height: min(24rem, calc(100vh - var(--app-header-height) - 2rem));
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--dropdown-shadow);
  touch-action: manipulation;
}

.app-header-alerts-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.app-header-alerts-panel__item {
  border-bottom: 1px solid var(--border-color);
}

.app-header-alerts-panel__item:last-child {
  border-bottom: none;
}

.app-header-alerts-panel__item.is-unread {
  background-color: var(--table-row-zebra);
}

.app-header-alerts-panel__item.is-dismissing {
  overflow: hidden;
}

.app-header-alerts-panel__item.is-dismissing .app-header-alerts-panel__row-wrap {
  opacity: 0;
  transform: translateX(-100%);
  transition:
    transform 0.22s ease,
    opacity 0.18s ease;
}

.app-header-alerts-panel__swipe {
  position: relative;
  overflow: hidden;
}

/* Hidden behind the row until swipe (mobile); desktop uses inline dismiss button */
.app-header-alerts-panel__reveal {
  display: none;
  pointer-events: none;
}

.app-header-alerts-panel__row-wrap {
  display: flex;
  align-items: stretch;
  position: relative;
  z-index: 1;
  width: 100%;
  box-sizing: border-box;
  background-color: var(--bg-surface);
  will-change: transform;
}

.app-header-alerts-panel__item.is-unread .app-header-alerts-panel__row-wrap {
  background-color: var(--table-row-zebra);
  position: relative;
}

.app-header-alerts-panel__item.is-unread .app-header-alerts-panel__row-wrap::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 4px;
  width: 6px;
  height: 6px;
  background-color: var(--accent-solid, #007bff);
  border-radius: 50%;
}

.app-header-alerts-panel__link {
  display: block;
  flex: 1 1 auto;
  min-width: 0;
  padding: 12px 8px 12px 14px;
  color: inherit;
  text-decoration: none;
  touch-action: manipulation;
  transition: background-color 0.12s ease, opacity 0.08s ease;
}

.app-header-alerts-panel__dismiss {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 44px;
  margin: 0;
  padding: 0;
  border: none;
  border-left: 1px solid var(--border-color);
  background: transparent;
  color: var(--admin-status-error);
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background-color 0.12s ease,
    color 0.12s ease,
    opacity 0.08s ease;
}

.app-header-alerts-panel__dismiss-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.app-header-alerts-panel__dismiss:hover {
  background-color: var(--table-row-hover);
  color: var(--admin-status-error);
}

.app-header-alerts-panel__dismiss:focus-visible {
  outline: 2px solid var(--input-focus-border);
  outline-offset: -2px;
}

.app-header-alerts-panel__link:hover {
  background-color: var(--table-row-hover);
}

.app-header-alerts-panel__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.app-header-alerts-panel__category {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 999px;
  background-color: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
}

.app-header-alerts-panel__category--prices {
  color: var(--text-primary);
}

.app-header-alerts-panel__category--account {
  color: var(--text-secondary);
}

.app-header-alerts-panel__time {
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.app-header-alerts-panel__title {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 2px;
}

.app-header-alerts-panel__body {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--text-secondary);
}

.app-header-alerts-panel__empty {
  margin: 0;
  padding: 14px 14px 0;
  color: var(--text-primary);
  font-weight: 500;
}

.app-header-alerts-panel__empty-hint {
  margin: 0;
  padding: 6px 14px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.app-header-alerts-panel__footer {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--border-color);
}

.app-header-alerts-panel__action {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-solid);
  text-decoration: none;
  touch-action: manipulation;
}

.app-header-alerts-panel__action:hover {
  text-decoration: underline;
}

.app-header-alerts-panel__action--secondary {
  font-weight: 500;
  color: var(--text-secondary);
}

.app-header-alerts-panel__action--secondary:hover {
  color: var(--text-primary);
}

.app-header-alerts-panel__unread {
  font-weight: 500;
  color: var(--text-secondary);
}

/* Mobile: full-width sheet under header */
@media (max-width: 767px) {
  .app-header-alerts-dropdown {
    position: fixed;
    left: 0;
    right: 0;
    top: calc(var(--app-header-height) + env(safe-area-inset-top, 0px));
    width: auto;
    max-width: none;
    padding-top: 0;
  }

  .app-header-alerts-dropdown__inner {
    transform: translateY(-100%);
  }

  .app-header-alerts-panel {
    max-height: min(70vh, 28rem);
    border-radius: 0 0 16px 16px;
    border-top: none;
  }

  body.has-verification-banner .app-header-alerts-dropdown {
    top: calc(
      var(--app-header-height) + env(safe-area-inset-top, 0px) + var(--site-banner-height, 50px)
    );
  }

  .app-header-alerts-panel__swipe {
    touch-action: pan-y;
  }

  .app-header-alerts-panel__reveal {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 4.5rem;
    margin: 0;
    padding: 0;
    border: none;
    background-color: var(--admin-status-error);
    color: var(--btn-primary-text);
    cursor: pointer;
    touch-action: manipulation;
    opacity: 0;
    transition: opacity 0.15s ease;
  }

  .app-header-alerts-panel__item.is-swipe-active .app-header-alerts-panel__reveal,
  .app-header-alerts-panel__item.is-swipe-open .app-header-alerts-panel__reveal {
    opacity: 1;
    pointer-events: auto;
  }

  .app-header-alerts-panel__reveal-icon {
    font-size: 1.15rem;
    line-height: 1;
    transform: scale(0.85);
    transition: transform 0.2s ease;
  }

  .app-header-alerts-panel__item.is-swipe-open .app-header-alerts-panel__reveal-icon {
    transform: scale(1);
  }

  .app-header-alerts-panel__row-wrap {
    transition: transform 0.28s cubic-bezier(0.25, 1, 0.5, 1);
  }

  .app-header-alerts-panel__item.is-swipe-open .app-header-alerts-panel__row-wrap {
    transform: translateX(-4.5rem);
  }

  .app-header-alerts-panel__link {
    padding: 12px 14px;
    flex: 1 1 auto;
    width: 100%;
    min-width: 0;
  }

  .app-header-alerts-panel__dismiss {
    display: none !important;
  }
}

@media (min-width: 768px) {
  .app-header-alerts-panel__reveal {
    display: none !important;
  }

  .app-header-alerts-panel__row-wrap {
    touch-action: manipulation;
  }
}

@media (pointer: coarse) {
  .app-header-alerts-panel__link:active {
    opacity: 0.92;
    transform: scale(0.995);
  }

  .app-header-alerts-panel__dismiss:active {
    opacity: 0.85;
    transform: scale(0.96);
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-header-alerts-dropdown__inner {
    transition: none;
  }

  .app-header-alerts-dropdown__inner {
    transform: none;
    opacity: 1;
  }

  .app-header__alerts:not(.is-open) .app-header-alerts-dropdown__inner {
    opacity: 0;
  }
}