/* Calendar pillar (LMA-S1-CALENDAR) — month grid, day agenda, This Week,
 * and the event dialogs. Tokens only (DG-T1); phone-first base layout, no
 * media queries needed below 768px (DG-T7). Targets >= --tap-min (DG-X2;
 * the month grid's 4px inter-cell gap is the documented deviation in
 * app/views/calendar/show.html.erb). Focus rings per DG-X4; dialog motion
 * respects prefers-reduced-motion (DG-X5 / FSDD Ch 21 §4). */

/* --- Flash (DG-S4 polite status / DG-H5 danger only on failure) --------- */

.cal-notice,
.cal-flash-alert {
  margin: 0 0 var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.cal-notice {
  background: var(--color-success-tint);
  color: var(--color-success);
}

.cal-flash-alert {
  background: var(--color-danger-tint);
  color: var(--color-danger);
}

/* --- Toolbar + buttons --------------------------------------------------- */

.cal-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-3);
}

.cal-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min); /* DG-X2 */
  padding: 0 var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-base); /* DG-X3 */
  font-weight: var(--weight-semibold);
  cursor: pointer;
}

.cal-button--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

/* DG-H5: danger fill only on true destruction (the confirm dialog). */
.cal-button--danger {
  background: var(--color-danger);
  border-color: var(--color-danger);
  color: var(--color-accent-ink);
}

.cal-button--danger-quiet {
  background: transparent;
  color: var(--color-danger);
}

.cal-quiet-action {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-min); /* DG-X2 */
  padding: 0;
  border: none;
  background: none;
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  text-decoration: underline;
  cursor: pointer;
}

/* DG-X4: visible focus, never removed without replacement. */
.cal-button:focus-visible,
.cal-quiet-action:focus-visible,
.cal-cell-link:focus-visible,
.cal-event-button:focus-visible,
.cal-week-event:focus-visible,
.cal-month-nav:focus-visible,
.cal-info-summary:focus-visible,
.cal-input:focus-visible,
.cal-checkbox:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* --- Month header + grid ------------------------------------------------- */

.cal-month-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.cal-month-title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
}

.cal-month-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--tap-min);  /* DG-X2 */
  min-height: var(--tap-min);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: var(--text-lg);
  text-decoration: none;
}

.cal-grid {
  width: 100%;
  border-collapse: separate;
  border-spacing: var(--space-1); /* documented DG-X2 deviation (show.html.erb) */
  table-layout: fixed;
}

.cal-grid-head {
  padding: var(--space-1) 0;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-ink-muted);
  text-transform: uppercase;
}

.cal-cell {
  padding: 0;
}

.cal-cell-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-height: var(--tap-preferred); /* DG-X2 */
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink);
  text-decoration: none;
}

.cal-cell--outside .cal-cell-link {
  background: var(--color-bg);
  color: var(--color-ink-muted);
}

.cal-cell-link--today {
  border-color: var(--color-accent);
}

/* Selected pairs tint with aria-current="date" — never color alone (DG-T6). */
.cal-cell-link--selected {
  background: var(--color-accent-tint);
  border-color: var(--color-accent);
}

.cal-cell-day {
  font-size: var(--text-sm);
  line-height: var(--leading-tight);
}

.cal-cell-count {
  min-width: var(--space-4);
  padding: 0 var(--space-1);
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-normal);
  text-align: center;
}

/* --- Info disclosure (the honest Phase-4 note) --------------------------- */

.cal-info {
  margin: var(--space-3) 0 var(--space-6);
}

.cal-info-summary {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-min); /* DG-X2 */
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  cursor: pointer;
}

.cal-info-text {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-ink-muted);
}

/* --- Sections, agenda, week --------------------------------------------- */

.cal-section-title {
  margin: var(--space-6) 0 var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
}

.cal-empty {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) 0;
}

.cal-empty-text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-ink-muted);
}

.cal-event-list,
.cal-week-list,
.cal-week-day-events {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2); /* DG-X2 */
}

.cal-event-button {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  width: 100%;
  min-height: var(--tap-preferred); /* DG-X2 */
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-family: var(--font-sans);
  text-align: left;
  cursor: pointer;
}

.cal-event-title,
.cal-week-event-title {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-ink);
}

.cal-event-meta,
.cal-week-event-meta {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-ink-muted);
}

.cal-week-day-title {
  margin: var(--space-2) 0 var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-ink-muted);
}

.cal-week-event {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-height: var(--tap-min); /* DG-X2 */
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  text-decoration: none;
}

/* --- Dialogs (Ch 21 dialog-path / confirm-path) -------------------------- */

.cal-dialog {
  width: min(100% - 2 * var(--space-4), 26rem);
  max-height: calc(100dvh - 2 * var(--space-12));
  overflow-y: auto;
  margin: auto;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-raised);
}

/* ::backdrop cannot reliably read page custom properties yet; the literal
 * mirrors --color-ink #1F2430 (DG-T4) — same literal-hex precedent as the
 * theme-color meta in layouts/application.html.erb. */
.cal-dialog::backdrop {
  background: rgba(31, 36, 48, 0.4);
}

/* Ch 21 §4 motion: dialogs animate in <= 200ms; reduced motion gets the
 * instant swap (DG-X5). */
@media (prefers-reduced-motion: no-preference) {
  .cal-dialog[open] {
    animation: cal-dialog-in 160ms ease-out;
  }

  @keyframes cal-dialog-in {
    from {
      opacity: 0;
      transform: translateY(var(--space-2)) scale(0.98);
    }

    to {
      opacity: 1;
      transform: none;
    }
  }
}

.cal-dialog-title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
}

.cal-dialog-note {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-ink-muted);
}

.cal-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2); /* DG-X2 */
  margin-top: var(--space-4);
}

.cal-danger-zone {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

/* --- Form fields ---------------------------------------------------------- */

.cal-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.cal-field--inline {
  flex-direction: row;
  align-items: center;
  gap: var(--space-2);
}

.cal-field-row {
  display: flex;
  gap: var(--space-2);
}

.cal-field-row .cal-field {
  flex: 1;
}

/* Rails wraps errored fields in div.field_with_errors; flatten it so the
 * dialog's flex column stays intact (the inline role="alert" message is the
 * error presentation here, DG-S5). */
.cal-field .field_with_errors {
  display: contents;
}

.cal-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
}

.cal-input {
  min-height: var(--tap-min); /* DG-X2 */
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-base); /* DG-X3: >= 16px, no iOS zoom */
}

.cal-input[aria-invalid="true"] {
  border-color: var(--color-danger);
}

.cal-input--notes {
  min-height: calc(2 * var(--tap-min));
  resize: vertical;
}

.cal-checkbox {
  width: var(--space-6);
  height: var(--space-6);
  accent-color: var(--color-accent);
}

.cal-field-error {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-danger);
}

/* --- Screen-reader-only text (full weekday names in the grid head) ------- */

.cal-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}