/**
 * Modul: Kalender (Calendar)
 * Zweck: Styles für Monats-/Wochen-/Tages-/Agenda-Ansicht, Termin-Karten, Modal
 * Abhängigkeiten: tokens.css, layout.css
 */

/* --------------------------------------------------------
 * Modul-Akzent
 * -------------------------------------------------------- */
.calendar-page { --module-accent: var(--module-calendar); }

/* --------------------------------------------------------
 * Seiten-Layout
 * -------------------------------------------------------- */
.calendar-page {
  display: flex;
  flex-direction: column;
  height: calc(100dvh - var(--safe-area-inset-top) - var(--nav-bottom-height) - var(--safe-area-inset-bottom));
  max-width: var(--content-max-width);
  margin: 0 auto;
  overflow: clip;
}

@media (min-width: 1024px) {
  .calendar-page {
    height: 100dvh;
  }
}

/* --------------------------------------------------------
 * Kalender-Toolbar (Navigation + Ansichts-Umschalter)
 * -------------------------------------------------------- */
.cal-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background-color: color-mix(in srgb, var(--color-bg) 90%, transparent);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  flex-shrink: 0;
  border-top: 3px solid var(--module-accent);
}

.cal-toolbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.cal-toolbar__nav .btn {
  color: var(--color-text-secondary);
}

.cal-toolbar__label {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  flex: 1;
  text-align: center;
  white-space: nowrap;
}

.cal-toolbar__today {
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-accent-light);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.cal-toolbar__views {
  display: flex;
  gap: var(--space-0h);
  background-color: var(--color-surface-2);
  border-radius: var(--radius-sm);
  padding: var(--space-0h);
}

.cal-toolbar__view-btn {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-xs);
  border: none;
  background: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: var(--target-lg);
  white-space: nowrap;
}

.cal-toolbar__view-btn:hover:not(.cal-toolbar__view-btn--active) {
  color: var(--color-text-primary);
}

.cal-toolbar__view-btn--active {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-sm);
}

/* ── Schmale Viewports (< 580px): Views in zweite Zeile ── */
@media (max-width: 579px) {
  .cal-toolbar {
    flex-wrap: wrap;
    row-gap: var(--space-2);
    padding-bottom: var(--space-2);
  }

  /* Nächste-Nav ans Ende der ersten Zeile bringen */
  .cal-toolbar > .cal-toolbar__nav:last-child {
    order: 4;
  }

  /* Views in volle zweite Zeile */
  .cal-toolbar__views {
    order: 10;
    flex-basis: 100%;
    justify-content: center;
  }

  .cal-toolbar__view-btn {
    flex: 1;
  }
}

/* --------------------------------------------------------
 * Monatsansicht
 * -------------------------------------------------------- */
.month-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.month-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.month-weekday {
  padding: var(--space-2) 0;
  text-align: center;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.month-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-auto-rows: 1fr;
  overflow-y: auto;
}

.month-day {
  border-right: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
  padding: var(--space-1);
  min-height: 80px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  overflow: hidden;
}

.month-day:nth-child(7n) {
  border-right: none;
}

.month-day:hover {
  background-color: var(--color-surface-2);
}

.month-day--outside {
  background-color: var(--color-bg);
  opacity: 0.5;
}

.month-day__number {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  width: var(--space-6);
  height: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-1);
}

.month-day--today .month-day__number {
  background-color: var(--color-accent);
  color: var(--color-text-on-accent);
  font-weight: var(--font-weight-bold);
}

.month-day--today {
  background-color: var(--color-accent-light);
}

.month-day__event {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-px) var(--space-1);
  border-radius: var(--radius-xs);
  margin-bottom: var(--space-0h);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  color: var(--color-text-on-accent);
  line-height: 1.6;
  filter: saturate(0.4);
}

.month-day__event span,
.allday-event span,
.week-event__title span,
.agenda-event__title span,
.event-popup__title span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.event-icon {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  opacity: 0.9;
}

.event-icon--compact {
  width: 12px;
  height: 12px;
}

.month-day__more {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  padding: var(--space-px) var(--space-1);
  cursor: pointer;
}

/* --------------------------------------------------------
 * Wochenansicht
 * -------------------------------------------------------- */
.week-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.week-view__header {
  display: grid;
  flex-shrink: 0;
  border-bottom: 1px solid var(--color-border);
}

.week-view__time-gutter {
  width: 48px;
  flex-shrink: 0;
}

.week-view__day-header {
  padding: var(--space-2) var(--space-1);
  text-align: center;
  border-left: 1px solid var(--color-border-subtle);
}

.week-view__day-name {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.week-view__day-num {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  margin: 0 auto;
}

.week-view__day-num--today {
  background-color: var(--color-accent);
  color: var(--color-text-on-accent);
}

.week-view__scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  position: relative;
}

.week-view__body {
  display: flex;
  min-height: calc(24 * var(--cal-hour-height)); /* 24h × 56px pro Stunde */
  position: relative;
}

.week-view__times {
  width: 48px;
  flex-shrink: 0;
  position: relative;
}

.week-view__time-slot {
  height: var(--cal-hour-height);
  padding-right: var(--space-2);
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding-top: var(--space-1);
}

.week-view__time-label {
  font-size: var(--text-xs);
  color: var(--color-text-disabled);
  white-space: nowrap;
}

.week-view__columns {
  flex: 1;
  display: grid;
  position: relative;
}

.week-view__col {
  border-left: 1px solid var(--color-border-subtle);
  position: relative;
}

.week-view__hour-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--color-border-subtle);
  pointer-events: none;
}

.week-view__now-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-danger);
  z-index: 2;
  pointer-events: none;
}

.week-view__now-line::before {
  content: '';
  position: absolute;
  left: -4px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-danger);
}

.week-event {
  position: absolute;
  border-radius: var(--radius-xs);
  padding: var(--space-0h) var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-on-accent);
  overflow: hidden;
  cursor: pointer;
  z-index: 1;
  line-height: 1.4;
  filter: saturate(0.4);
  transition: filter var(--transition-fast);
}

.week-event:hover {
  filter: saturate(0.4) brightness(0.9);
}

.week-event__title {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.week-event__time {
  font-size: var(--text-xs);
  opacity: 0.85;
}

.event-attachment-preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.event-attachment-preview img {
  width: 100%;
  max-height: 180px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
}

.event-attachment-preview a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-accent);
  word-break: break-word;
}

.document-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 148px;
  padding: var(--space-5);
  border: 1.5px dashed color-mix(in srgb, var(--module-calendar) 48%, var(--color-border));
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--module-calendar) 7%, var(--color-surface));
  color: var(--color-text-secondary);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.document-dropzone:hover,
.document-dropzone--active {
  border-color: var(--module-calendar);
  background: color-mix(in srgb, var(--module-calendar) 12%, var(--color-surface));
}

.document-dropzone--active {
  transform: translateY(-1px);
}

.document-dropzone__icon {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--module-calendar);
  background: color-mix(in srgb, var(--module-calendar) 15%, transparent);
}

.document-dropzone__icon svg {
  width: 22px;
  height: 22px;
}

.document-dropzone__title {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
}

.document-dropzone__hint,
.document-dropzone__file {
  max-width: 100%;
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  overflow-wrap: anywhere;
}

.document-dropzone__file {
  color: var(--module-calendar);
  font-weight: var(--font-weight-medium);
}

/* --------------------------------------------------------
 * Tagesansicht
 * -------------------------------------------------------- */
.day-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.day-view__header {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
  flex-shrink: 0;
}

.day-view__date-label {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
}

.day-view__scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.day-view__body {
  display: flex;
  min-height: calc(24 * var(--cal-hour-height));
  position: relative;
}

.day-view__times {
  width: 48px;
  flex-shrink: 0;
}

.day-view__col {
  flex: 1;
  border-left: 1px solid var(--color-border-subtle);
  position: relative;
}

/* --------------------------------------------------------
 * Agenda-Ansicht
 * -------------------------------------------------------- */
.agenda-view {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-2) var(--space-4) var(--space-6);
}

.agenda-day {
  margin-bottom: var(--space-4);
}

.agenda-day__header {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-2) 0 var(--space-1);
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-2);
  position: sticky;
  top: 0;
  background-color: var(--color-bg);
  z-index: var(--z-base);
}

.agenda-day__date {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.agenda-day__weekday {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.agenda-day__header--today .agenda-day__date {
  color: var(--color-accent);
}

.agenda-event {
  display: flex;
  align-items: stretch;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-1);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.agenda-event:hover {
  background-color: var(--color-surface-2);
}

.agenda-event__color {
  width: 3px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  filter: saturate(0.4);
}

.agenda-event__body {
  flex: 1;
  min-width: 0;
}

.agenda-event__title {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.event-title-picker {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: var(--space-3);
  align-items: end;
}

.event-icon-picker {
  position: relative;
}

.event-title-picker__title {
  min-width: 0;
}

.event-icon-picker__trigger {
  width: 52px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.event-icon-picker__trigger:hover,
.event-icon-picker__trigger:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.event-icon-picker__trigger:active {
  transform: scale(0.98);
}

.event-icon-picker__trigger i,
.event-icon-picker__trigger svg {
  width: 22px;
  height: 22px;
}

.event-icon-picker__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: var(--space-2);
  margin: calc(var(--space-2) * -1) 0 var(--space-4) 0;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
}

.event-icon-picker__grid[hidden] {
  display: none !important;
}

.event-icon-picker__option {
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.event-icon-picker__option:hover,
.event-icon-picker__option:focus-visible {
  color: var(--color-text-primary);
  border-color: var(--color-border);
  transform: translateY(-1px);
}

.event-icon-picker__option--active {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.event-icon-picker__option i,
.event-icon-picker__option svg {
  width: 20px;
  height: 20px;
}

.reminder-custom {
  margin-top: var(--space-3);
}

.reminder-custom[hidden] {
  display: none !important;
}

.agenda-event__meta {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: 2px;
}

.agenda-event__assigned {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.agenda-event__avatar {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-on-accent);
  flex-shrink: 0;
}

.agenda-empty {
  text-align: center;
  padding: var(--space-8);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

/* --------------------------------------------------------
 * Calendar-Modal Content-Styles (Overlay/Panel via shared modal.js)
 * -------------------------------------------------------- */

/* Farbauswahl */
.color-picker {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.color-swatch {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  position: relative;
}

.color-swatch::before {
  content: '';
  position: absolute;
  inset: -10px;
  border-radius: var(--radius-full);
}

.color-swatch:hover {
  transform: scale(1.15);
}

.color-swatch--active {
  border-color: var(--color-text-primary);
  transform: scale(1.1);
}

/* --------------------------------------------------------
 * Termin-Detailansicht (Popup beim Klick)
 * -------------------------------------------------------- */
.event-popup {
  position: fixed;
  z-index: calc(var(--z-modal) - 1);
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  min-width: 240px;
  max-width: 320px;
  animation: fadeIn var(--transition-fast) ease;
}

.event-popup__color-bar {
  height: 4px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
  filter: saturate(0.4);
}

.event-popup__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.event-popup__meta {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.event-popup__actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.event-popup__attachment {
  margin-top: var(--space-2);
}

.event-popup__attachment--image img {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
}

.event-popup__attachment--file {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-accent);
}

/* --------------------------------------------------------
 * Ganztägige Ereignisse (oben in Wochen-/Tagesansicht)
 * -------------------------------------------------------- */
.allday-row {
  display: grid;
  border-bottom: 1px solid var(--color-border);
  min-height: 28px;
  flex-shrink: 0;
}

.allday-cell {
  border-left: 1px solid var(--color-border-subtle);
  padding: 2px;
  min-width: 0;
  overflow: hidden;
}

.allday-event {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-px) var(--space-1);
  border-radius: var(--radius-xs);
  color: var(--color-text-on-accent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: var(--space-0h);
  cursor: pointer;
  filter: saturate(0.4);
}

@media (max-width: 640px) {
  .event-title-picker {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------
 * Kalender-Name-Label (Agenda, Popup)
 * -------------------------------------------------------- */
.event-cal-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  color: var(--color-text-disabled);
}

.event-cal-label::before {
  content: '';
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: var(--radius-full);
  background: var(--cal-color, currentColor);
  flex-shrink: 0;
  filter: saturate(0.4);
}