/* ============================================
   Feedback Components — Alerts & Snackbars
   ============================================
   Migrated from app/static/css/md3/components/alerts.css
   and app/static/css/md3/components/snackbar.css.
   Class prefix changed from md3- to pm-; visual output unchanged.
   Token references stay as-is (token bridge in 00_tokens.css covers them).
   ============================================ */

/* ============================================
   1. Alert Base Container
   ============================================ */
.pm-alert {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: var(--space-3);
  row-gap: var(--space-1);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-4);
  border-radius: var(--radius-md);
  border-left: 4px solid transparent;
  align-items: start;
  animation: alert-slide-down 300ms cubic-bezier(0.4, 0, 0.2, 1);
  /* Default: neutral surface */
  background-color: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
}

.pm-alert[hidden] {
  display: none !important;
}

/* ============================================
   2. Alert Layout Variants
   ============================================ */

/* Banner variant: Full-width for page/section alerts */
.pm-alert--banner {
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  border-left-width: 6px;
}

/* Inline variant: Compact for form contexts */
.pm-alert--inline {
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-4);
  border-radius: var(--radius-md);
  border-left-width: 4px;
}

/* Field/message surface: inline alerts that should read like a deliberate
   form-adjacent surface instead of a loose banner. */
.pm-alert--field {
  border: 1px solid var(--md-sys-color-outline-variant);
  border-inline-start-width: 4px;
  border-inline-start-style: solid;
  box-shadow: inset 0 1px 0 color-mix(in srgb, currentColor 6%, transparent);
}

.pm-alert--field.pm-alert--error {
  background-color: color-mix(
    in srgb,
    var(--md-sys-color-error-container) 96%,
    var(--md-sys-color-surface) 4%
  ) !important;
  border-color: color-mix(in srgb, var(--md-sys-color-error) 45%, var(--md-sys-color-outline-variant) 55%) !important;
}

/* ============================================
   3. Alert Icon
   ============================================ */
.pm-alert__icon {
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  font-size: 1.5rem;
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0;
}

.pm-alert--inline .pm-alert__icon {
  font-size: 1.25rem;
  width: 1.25rem;
  height: 1.25rem;
}

/* ============================================
   4. Alert Content
   ============================================ */
.pm-alert__content {
  display: contents;
  flex-grow: 1;
  min-width: 0; /* Allow text wrapping */
}

.pm-alert__content > * {
  margin: 0;
}

/* Alert Title */
.pm-alert__title {
  grid-column: 2;
  grid-row: 1;
  align-self: center;
  font-family: var(--md-sys-typescale-title-small-font-family, inherit);
  font-size: var(--md-sys-typescale-title-small-font-size, 0.875rem);
  font-weight: var(--md-sys-typescale-title-small-font-weight, 500);
  line-height: var(--md-sys-typescale-title-small-line-height, 1.25rem);
  letter-spacing: var(--md-sys-typescale-title-small-letter-spacing, 0.1px);
  margin: 0;
}

/* Alert Text */
.pm-alert__text {
  grid-column: 1 / -1;
  grid-row: 2;
  font-family: var(--md-sys-typescale-body-medium-font-family, inherit);
  font-size: var(--md-sys-typescale-body-medium-font-size, 0.875rem);
  font-weight: var(--md-sys-typescale-body-medium-font-weight, 400);
  line-height: var(--md-sys-typescale-body-medium-line-height, 1.25rem);
  letter-spacing: var(--md-sys-typescale-body-medium-letter-spacing, 0.25px);
  margin: 0;
}

/* Alert Message (legacy alias for text) */
.pm-alert__message {
  grid-column: 1 / -1;
  grid-row: 2;
  font-family: var(--md-sys-typescale-body-medium-font-family, inherit);
  font-size: var(--md-sys-typescale-body-medium-font-size, 0.875rem);
  font-weight: var(--md-sys-typescale-body-medium-font-weight, 400);
  line-height: var(--md-sys-typescale-body-medium-line-height, 1.25rem);
  letter-spacing: var(--md-sys-typescale-body-medium-letter-spacing, 0.25px);
  margin: 0;
}

/* Inline variant: tighter typography */
.pm-alert--inline .pm-alert__title {
  font-size: var(--md-sys-typescale-label-large-font-size, 0.875rem);
  font-weight: var(--md-sys-typescale-label-large-font-weight, 500);
  line-height: var(--md-sys-typescale-label-large-line-height, 1.25rem);
}

.pm-alert--inline .pm-alert__text,
.pm-alert--inline .pm-alert__message {
  font-size: var(--md-sys-typescale-body-small-font-size, 0.75rem);
  line-height: var(--md-sys-typescale-body-small-line-height, 1rem);
}

.pm-alert--field .pm-alert__content {
  gap: var(--space-1);
}

/* ============================================
   5. Color Variants
   ============================================ */

/* Error Variant */
.pm-alert--error {
  background-color: var(--md-sys-color-error-container) !important;
  border-left-color: var(--md-sys-color-error);
  color: var(--md-sys-color-on-error-container);
}

.pm-alert--error .pm-alert__icon {
  color: var(--md-sys-color-error);
}

.pm-alert--error .pm-alert__title {
  color: var(--md-sys-color-on-error-container, #410e0b);
}

.pm-alert--error .pm-alert__text,
.pm-alert--error .pm-alert__message {
  color: var(--md-sys-color-on-error-container, #410e0b);
}

/* Warning Variant */
.pm-alert--warning {
  background-color: var(--md-sys-color-warning-container);
  border-left-color: var(--md-sys-color-warning);
  color: var(--md-sys-color-on-warning-container);
}

.pm-alert--warning .pm-alert__icon {
  color: var(--md-sys-color-warning);
}

.pm-alert--warning .pm-alert__title {
  color: var(--md-sys-color-on-warning-container, #4e2c00);
}

.pm-alert--warning .pm-alert__text,
.pm-alert--warning .pm-alert__message {
  color: var(--md-sys-color-on-warning-container, #4e2c00);
}

/* Info Variant */
.pm-alert--info {
  background-color: var(--md-sys-color-primary-container);
  border-left-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary-container);
}

.pm-alert--info .pm-alert__icon {
  color: var(--md-sys-color-primary);
}

.pm-alert--info .pm-alert__title {
  color: var(--md-sys-color-on-primary-container, #0d3c61);
}

.pm-alert--info .pm-alert__text,
.pm-alert--info .pm-alert__message {
  color: var(--md-sys-color-on-primary-container, #0d3c61);
}

/* Success Variant */
.pm-alert--success {
  background-color: color-mix(in srgb,
    var(--md-sys-color-surface) 70%,
    var(--md-sys-color-success-container, #e6f4ea) 30%
  );
  border-left-color: color-mix(in srgb,
    var(--md-sys-color-outline) 40%,
    var(--md-sys-color-success, #34a853) 60%
  );
  color: var(--md-sys-color-on-surface);
}

.pm-alert--success .pm-alert__icon {
  color: color-mix(in srgb,
    var(--md-sys-color-on-surface-variant) 30%,
    var(--md-sys-color-success, #34a853) 70%
  );
}

.pm-alert--success .pm-alert__title {
  color: var(--md-sys-color-on-surface);
}

.pm-alert--success .pm-alert__text,
.pm-alert--success .pm-alert__message {
  color: var(--md-sys-color-on-surface-variant);
}

/* ============================================
   6. Field Support Text
   ============================================ */
.pm-field-support {
  margin-top: var(--space-1);
  padding-left: var(--space-4);
  color: var(--md-sys-color-on-surface-variant);
}

.pm-field-support p {
  margin: 0;
  font-size: var(--md-sys-typescale-body-small-font-size);
  font-weight: var(--md-sys-typescale-body-small-font-weight);
  line-height: var(--md-sys-typescale-body-small-line-height);
  letter-spacing: var(--md-sys-typescale-body-small-letter-spacing);
}

/* ============================================
   7. Field Error Messages
   ============================================ */
.pm-field-error {
  margin-top: var(--space-1);
  padding-left: var(--space-4);
  color: var(--md-sys-color-error);
  min-height: 0;
  overflow: hidden;
  transition: opacity 150ms ease-out, max-height 150ms ease-out;
}

.pm-field-error:empty {
  display: none;
}

.pm-field-error p {
  margin: 0;
  font-size: var(--md-sys-typescale-body-small-font-size);
  font-weight: var(--md-sys-typescale-body-small-font-weight);
  line-height: var(--md-sys-typescale-body-small-line-height);
  letter-spacing: var(--md-sys-typescale-body-small-letter-spacing);
}

/* pm-error-text: inline error styling */
.pm-error-text {
  color: var(--md-sys-color-error);
  font-size: var(--md-sys-typescale-body-small-font-size);
  font-weight: var(--md-sys-typescale-body-small-font-weight);
  line-height: var(--md-sys-typescale-body-small-line-height);
  letter-spacing: var(--md-sys-typescale-body-small-letter-spacing);
}

/* ============================================
   8. Animation
   ============================================ */
@keyframes alert-slide-down {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   9. Responsive
   ============================================ */
@media (max-width: 480px) {
  .pm-alert {
    padding: var(--space-3) var(--space-4);
    gap: var(--space-3);
  }

  .pm-alert--banner {
    padding: var(--space-3) var(--space-4);
    border-left-width: 4px;
  }

  .pm-alert--inline {
    padding: var(--space-2) var(--space-3);
  }

  .pm-alert__icon {
    font-size: 1.25rem;
    width: 1.25rem;
    height: 1.25rem;
  }

  .pm-alert__title {
    font-size: var(--md-sys-typescale-label-large-font-size);
    font-weight: var(--md-sys-typescale-label-large-font-weight);
    line-height: var(--md-sys-typescale-label-large-line-height);
  }

  .pm-alert__text,
  .pm-alert__message {
    font-size: var(--md-sys-typescale-body-small-font-size);
    line-height: var(--md-sys-typescale-body-small-line-height);
  }

  .pm-field-support,
  .pm-field-error {
    padding-left: var(--space-3);
  }
}

/* ============================================
   10. Form Status Container
   ============================================ */
.pm-form-status {
  margin-top: var(--space-3);
}

.pm-form-status:empty {
  display: none;
}

/* Ensure alerts inside status container have no extra margin */
.pm-form-status > .pm-alert:last-child {
  margin-bottom: 0;
}

/* ============================================
   11. Alert Positioning Utilities
   ============================================ */

/* Alert above form (default behavior) */
.pm-alert--above {
  margin-bottom: var(--space-4);
  margin-top: 0;
}

/* Alert below content */
.pm-alert--below {
  margin-top: var(--space-4);
  margin-bottom: 0;
}

/* Alert inside card (uses card's internal spacing) */
.pm-card__content > .pm-alert:first-child {
  margin-top: 0;
}

.pm-card__content > .pm-alert:last-child {
  margin-bottom: 0;
}

/* Dismissible alert (with close button) */
.pm-alert--dismissible {
  padding-right: var(--space-10);
  position: relative;
}

.pm-alert__close {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  padding: var(--space-2);
  border: none;
  background: transparent;
  color: inherit;
  cursor: pointer;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.7;
  transition: opacity 150ms ease, background-color 150ms ease;
}

.pm-alert__close:hover {
  opacity: 1;
  background: rgba(0, 0, 0, 0.08);
}

.pm-alert__close .material-symbols-rounded {
  font-size: 1.25rem;
}

/* ============================================
   12. Screen Reader Only Status
   ============================================ */
.pm-sr-status {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   Snackbar
   ============================================ */

.pm-snackbar {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  z-index: 2147483647;

  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);

  min-width: 288px;
  max-width: min(560px, calc(100vw - var(--space-8)));

  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  border-radius: var(--radius-sm);
  box-shadow: var(--elev-3);

  opacity: 0;
  visibility: hidden;
  transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1),
              opacity 200ms ease,
              visibility 200ms ease;
}

.pm-snackbar.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

.pm-snackbar__icon {
  font-size: 24px;
  flex-shrink: 0;
}

.pm-snackbar__message {
  flex: 1;
  font-size: var(--md-sys-typescale-body-medium-font-size);
  line-height: var(--md-sys-typescale-body-medium-line-height);
}

.pm-snackbar__action {
  flex-shrink: 0;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  color: var(--md-sys-color-inverse-primary);
  font-size: var(--md-sys-typescale-label-large-font-size);
  font-weight: var(--md-sys-typescale-label-large-font-weight);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color 150ms ease;
}

.pm-snackbar__action:hover {
  background: color-mix(in srgb, var(--md-sys-color-inverse-on-surface) 8%, transparent);
}

/* Success Variant */
.pm-snackbar--success {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.pm-snackbar--success .pm-snackbar__icon {
  color: var(--md-sys-color-on-primary);
}

.pm-snackbar--success .pm-snackbar__action {
  color: var(--md-sys-color-on-primary);
}

/* Error Variant */
.pm-snackbar--error {
  background: var(--md-sys-color-error);
  color: var(--md-sys-color-on-error);
}

.pm-snackbar--error .pm-snackbar__icon {
  color: var(--md-sys-color-on-error);
}

.pm-snackbar--error .pm-snackbar__action {
  color: var(--md-sys-color-on-error);
}

/* Info Variant */
.pm-snackbar--info {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

/* Warning Variant */
.pm-snackbar--warning {
  background: var(--md-sys-color-warning-container);
  color: var(--md-sys-color-on-warning-container);
}

.pm-snackbar--warning .pm-snackbar__icon {
  color: var(--md-sys-color-warning);
}

.pm-snackbar--warning .pm-snackbar__action {
  color: var(--md-sys-color-on-warning-container);
}

/* Responsive */
@media (max-width: 600px) {
  .pm-snackbar {
    left: var(--space-4);
    right: var(--space-4);
    transform: translateX(0) translateY(100px);
    min-width: auto;
  }

  .pm-snackbar.visible {
    transform: translateX(0) translateY(0);
  }
}