/**
 * Modul: Aufgaben (Tasks)
 * Zweck: Styles für Listenansicht, Task-Cards, Subtasks, Filter-Panel, Modal
 * Abhängigkeiten: tokens.css, layout.css
 */

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

/* --------------------------------------------------------
 * Seiten-Layout
 * -------------------------------------------------------- */
.tasks-page {
  padding: var(--space-4);
  padding-bottom: calc(var(--nav-height-mobile) + var(--safe-area-inset-bottom) + var(--space-16));
  max-width: var(--content-max-width);
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .tasks-page {
    padding: var(--space-8);
    padding-bottom: var(--space-16);
  }
}

/* --------------------------------------------------------
 * Header + Toolbar
 * -------------------------------------------------------- */
.tasks-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.tasks-toolbar__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  flex: 1;
  min-width: 0;
}

.tasks-toolbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Gruppierungs-Toggle */
.group-toggle {
  display: flex;
  background-color: var(--color-surface-2);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}

.group-toggle__btn {
  padding: var(--space-1) var(--space-3);
  border-radius: calc(var(--radius-sm) - 2px);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  min-height: var(--target-lg);
  cursor: pointer;
}

.group-toggle__btn:hover:not(.group-toggle__btn--active) {
  color: var(--color-text-primary);
}

.group-toggle__btn--active {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-sm);
}

/* --------------------------------------------------------
 * Filter-Leiste
 * -------------------------------------------------------- */
.tasks-filters {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  overflow-x: auto;
  padding-bottom: var(--space-1);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tasks-filters::-webkit-scrollbar { display: none; }

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  cursor: pointer;
  border: 1.5px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  min-height: 34px;
}

.filter-chip:hover:not(.filter-chip--active) {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}

.filter-chip--active {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-chip__remove {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
  color: #fff;
  font-size: var(--text-xs);
  line-height: 1;
}

/* --------------------------------------------------------
 * Gruppen-Überschriften
 * -------------------------------------------------------- */
.task-group {
  margin-bottom: var(--space-6);
}

.task-group__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
  padding: 0 var(--space-1);
}

.task-group__title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.task-group__count {
  font-size: var(--text-xs);
  color: var(--color-text-disabled);
  background-color: var(--color-surface-2);
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------
 * Swipe-Wrapper (Mobil-Gesten)
 * -------------------------------------------------------- */
.swipe-row {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  /* Verhindert ungewolltes Flackern auf iOS */
  -webkit-backface-visibility: hidden;
}

/* Kein Margin mehr am Task-Card selbst (übernimmt swipe-row) */
.swipe-row .task-card {
  margin-bottom: 0;
  border-radius: var(--radius-md);
  position: relative;
  z-index: 1;
  will-change: transform;
}

/* Reveal-Panels hinter der Karte */
.swipe-reveal {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  opacity: 0;
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.05s linear;
}

/* Links hinter der Karte = Erledigt (Swipe nach links) */
.swipe-reveal--done {
  right: 0;
  background-color: var(--color-success);
  color: #fff;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Rechts hinter der Karte = Bearbeiten (Swipe nach rechts) */
.swipe-reveal--edit {
  left: 0;
  background-color: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

/* Touch-Feedback: leichte Hervorhebung während Swipe */
.swipe-row--swiping .task-card {
  box-shadow: var(--shadow-lg);
}

/* --------------------------------------------------------
 * Task-Card
 * -------------------------------------------------------- */
.task-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-2);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.task-card:hover {
  box-shadow: var(--shadow-md);
}

.task-card--done {
  opacity: 0.6;
  transition: opacity var(--transition-base);
}

.task-card__main {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
}

/* Status-Checkbox */
.task-status-btn {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background: none;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  position: relative;
}

.task-status-btn::before {
  content: '';
  position: absolute;
  inset: -13px;
}

.task-status-btn--done {
  border-color: var(--color-success);
  background-color: var(--color-success);
  animation: check-pop 0.2s var(--ease-out);
}

@keyframes check-pop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.task-status-btn--in_progress {
  border-color: var(--color-warning);
}

.task-status-btn__check {
  width: 12px;
  height: 12px;
  color: #fff;
  display: none;
}

.task-status-btn--done .task-status-btn__check { display: block; }

.task-card__body {
  flex: 1;
  min-width: 0;
}

.task-card__title {
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
  cursor: pointer;
}

.task-card--done .task-card__title {
  text-decoration: line-through;
  color: var(--color-text-secondary);
}

.task-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Prioritäts-Badge */
.priority-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  padding: 2px var(--space-2);
  border-radius: var(--radius-xs);
}

.priority-badge--low     { color: var(--color-priority-low);    background-color: var(--color-priority-low-bg); }
.priority-badge--medium  { color: var(--color-priority-medium); background-color: var(--color-priority-medium-bg); }
.priority-badge--high    { color: var(--color-priority-high);   background-color: var(--color-priority-high-bg); }
.priority-badge--urgent  { color: var(--color-priority-urgent); background-color: var(--color-priority-urgent-bg); }

.priority-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.priority-dot--low    { background-color: var(--color-priority-low); }
.priority-dot--medium { background-color: var(--color-priority-medium); }
.priority-dot--high   { background-color: var(--color-priority-high); }
.priority-dot--urgent { background-color: var(--color-priority-urgent); }

/* Fälligkeitsdatum */
.due-date {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 3px;
}

.due-date--overdue { color: var(--color-danger); font-weight: var(--font-weight-semibold); }
.due-date--today   { color: var(--color-warning); font-weight: var(--font-weight-semibold); }

/* Avatar */
.task-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  color: #fff;
  flex-shrink: 0;
}

/* Subtask-Fortschrittsbalken */
.subtask-progress {
  padding: 0 var(--space-3) var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.subtask-progress__bar-wrap {
  flex: 1;
  height: 4px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.subtask-progress__bar-fill {
  height: 100%;
  background-color: var(--color-success);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.subtask-progress__text {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* Subtask-Liste (eingeklappt/ausgeklappt) */
.subtask-list {
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--space-2) var(--space-3);
  display: none;
}

.subtask-list--visible { display: block; }

.subtask-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.subtask-item:last-child { border-bottom: none; }

.subtask-item__checkbox {
  width: 18px;
  height: 18px;
  border-radius: var(--radius-xs);
  border: 1.5px solid var(--color-border);
  background: none;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  position: relative;
}

.subtask-item__checkbox::before {
  content: '';
  position: absolute;
  inset: -15px;
}

.subtask-item__checkbox--done {
  background-color: var(--color-success);
  border-color: var(--color-success);
}

.subtask-item__title {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  flex: 1;
}

.subtask-item--done .subtask-item__title {
  text-decoration: line-through;
  color: var(--color-text-secondary);
}

.subtask-item__add {
  width: 100%;
  padding: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: none;
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  margin-top: var(--space-2);
  min-height: var(--target-lg);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.subtask-item__add:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --------------------------------------------------------
 * Overdue-Badge (Navigation)
 * -------------------------------------------------------- */
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--radius-full);
  background-color: var(--color-danger);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  margin-left: auto;
}

/* --------------------------------------------------------
 * Kanban-Board
 * -------------------------------------------------------- */
.kanban-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  align-items: start;
  min-height: 60vh;
}

@media (min-width: 640px) {
  .kanban-board {
    grid-template-columns: repeat(3, 1fr);
  }
}

.kanban-col {
  background-color: var(--color-surface-2);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.kanban-col__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1.5px solid var(--color-border);
}

.kanban-col__title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kanban-col__count {
  font-size: var(--text-xs);
  color: var(--color-text-disabled);
  background-color: var(--color-surface);
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
}

.kanban-col__body {
  flex: 1;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-height: 80px;
  transition: background-color var(--transition-fast);
}

.kanban-col__body--over {
  background-color: var(--color-accent-light);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.kanban-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  padding: var(--space-3);
  cursor: grab;
  user-select: none;
  transition: box-shadow var(--transition-fast), opacity var(--transition-fast),
              transform var(--transition-fast);
}

.kanban-card:hover {
  box-shadow: var(--shadow-md);
}

.kanban-card--dragging {
  opacity: 0.4;
  cursor: grabbing;
  transform: rotate(1.5deg);
}

.kanban-card--done {
  opacity: 0.6;
}

.kanban-card__title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.kanban-card--done .kanban-card__title {
  text-decoration: line-through;
  color: var(--color-text-secondary);
}

.kanban-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.kanban-card__footer {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-2);
}

.kanban-drop-placeholder {
  height: 60px;
  border: 2px dashed var(--color-accent);
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-light);
  opacity: 0.5;
}