/* ===== Stats Cards ===== */
.stat-card {
  background: var(--bg-primary);
  padding: 20px;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== Filter Buttons ===== */
.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.filter-btn.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* ===== Task Cards ===== */
.task-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: var(--transition);
}

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

.task-checkbox {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.task-checkbox:hover {
  border-color: var(--primary-color);
}

.task-checkbox.completed {
  background: var(--success-color);
  border-color: var(--success-color);
}

.task-checkbox.completed::after {
  content: '✓';
  color: white;
  font-size: 12px;
}

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

.task-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.task-card.completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: pre-wrap;
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.task-status {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: capitalize;
}

.task-status.pending {
  background: #fef3c7;
  color: #92400e;
}

.task-status.in-progress {
  background: #dbeafe;
  color: #1e40af;
}

.task-status.completed {
  background: #d1fae5;
  color: #065f46;
}

.task-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.task-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.task-action-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.task-action-btn:hover {
  background: var(--border-color);
}

.task-action-btn.delete:hover {
  background: #fee2e2;
  color: var(--danger-color);
}

/* ===== Empty & Loading States ===== */
.empty-state,
.loading-state {
  text-align: center;
  padding: 60px 20px;
  display: none;
}

.empty-state.show,
.loading-state.show {
  display: block;
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--text-secondary);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  margin: 0 auto 16px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  padding: 20px;
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(-20px);
  transition: var(--transition);
}

.modal-overlay.show .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--border-color);
}

#taskForm {
  padding: 24px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: white;
  padding: 12px 24px;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}