/**
 * Modern Card Components
 * ClickUp-Inspired Card & Task Styles
 * Version 2.0 - December 2025
 */

/* ========================================
   BASE CARD STYLES
   ======================================== */

.card-modern {
  /* Layout */
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  
  /* Borders & Shadows */
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  
  /* Transitions */
  transition: all var(--transition-base);
}

.card-modern:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-gray-200);
}

.dark .card-modern {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
}

.dark .card-modern:hover {
  background: var(--dark-bg-tertiary);
  border-color: var(--color-gray-600);
}

/* Card Without Hover Effect */
.card-static {
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  background: white;
}

.dark .card-static {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
}

/* Compact Card */
.card-compact {
  padding: var(--space-4);
}

/* ========================================
   CARD HEADER
   ======================================== */

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.dark .card-header {
  border-bottom-color: var(--dark-border);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
  margin: 0;
}

.dark .card-title {
  color: var(--dark-text-primary);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

.dark .card-subtitle {
  color: var(--dark-text-secondary);
}

/* Card Actions (Top Right) */
.card-actions {
  display: flex;
  gap: var(--space-2);
}

/* ========================================
   CARD BODY
   ======================================== */

.card-body {
  color: var(--color-gray-700);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

.dark .card-body {
  color: var(--dark-text-secondary);
}

/* ========================================
   CARD FOOTER
   ======================================== */

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
}

.dark .card-footer {
  border-top-color: var(--dark-border);
}

/* ========================================
   TASK CARD (ClickUp Style)
   ======================================== */

.task-card {
  position: relative;
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
  overflow: hidden;
}

.task-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-gray-300);
}

.dark .task-card {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
}

.dark .task-card:hover {
  background: var(--dark-bg-tertiary);
  border-color: var(--color-gray-600);
}

/* Priority Indicator (Left Colored Border) */
.task-priority {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
}

.task-priority-urgent {
  background: var(--priority-urgent);
}

.task-priority-high {
  background: var(--priority-high);
}

.task-priority-normal {
  background: var(--priority-normal);
}

.task-priority-low {
  background: var(--priority-low);
}

/* Task Header */
.task-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.task-title {
  flex: 1;
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-gray-900);
  line-height: var(--leading-normal);
}

.dark .task-title {
  color: var(--dark-text-primary);
}

/* Task Completed State */
.task-card.completed .task-title {
  text-decoration: line-through;
  color: var(--color-gray-500);
}

/* Task Checkbox */
.task-checkbox {
  flex-shrink: 0;
}

.checkbox-modern {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  appearance: none;
  position: relative;
  background: white;
}

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

.checkbox-modern:checked {
  background: var(--color-success);
  border-color: var(--color-success);
}

.checkbox-modern:checked::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 6px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.dark .checkbox-modern {
  background: var(--dark-bg-tertiary);
  border-color: var(--dark-border);
}

/* Task Actions (Appear on Hover) */
.task-actions {
  display: flex;
  gap: var(--space-2);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.task-card:hover .task-actions {
  opacity: 1;
}

.action-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-gray-500);
  transition: all var(--transition-fast);
  cursor: pointer;
  background: transparent;
  border: none;
}

.action-icon:hover {
  background: var(--color-gray-100);
  color: var(--color-primary);
}

.dark .action-icon:hover {
  background: var(--dark-bg-tertiary);
  color: var(--color-primary-light);
}

/* ========================================
   TASK METADATA
   ======================================== */

.task-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  flex-wrap: wrap;
}

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

/* Avatar Small */
.avatar-sm {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  border: 2px solid white;
  object-fit: cover;
}

.dark .avatar-sm {
  border-color: var(--dark-bg-secondary);
}

/* Avatar Group */
.avatar-group {
  display: flex;
  margin-left: calc(var(--space-2) * -1);
}

.avatar-group .avatar-sm {
  margin-left: calc(var(--space-2) * -1);
  position: relative;
}

.avatar-group .avatar-sm:hover {
  z-index: 1;
  transform: translateY(-2px);
}

/* Badge Plugin */
.badge-plugin {
  background: var(--color-gray-100);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
}

.dark .badge-plugin {
  background: var(--dark-bg-tertiary);
  color: var(--dark-text-secondary);
}

/* ========================================
   TAGS
   ======================================== */

.task-tags {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

.tag {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  transition: all var(--transition-fast);
}

.tag:hover {
  transform: scale(1.05);
}

/* Tag Colors */
.tag-blue {
  background: var(--color-info-light);
  color: var(--color-info-dark);
}

.tag-green {
  background: var(--color-success-light);
  color: var(--color-success-dark);
}

.tag-red {
  background: var(--color-danger-light);
  color: var(--color-danger-dark);
}

.tag-yellow {
  background: var(--color-warning-light);
  color: var(--color-warning-dark);
}

.tag-purple {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* ========================================
   STATUS BADGES
   ======================================== */

.badge-status {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.badge-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
}

.badge-status-pending {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.badge-status-pending::before {
  background: var(--status-pending);
}

.badge-status-in-progress {
  background: var(--color-info-light);
  color: var(--color-info-dark);
}

.badge-status-in-progress::before {
  background: var(--status-in-progress);
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.badge-status-completed {
  background: var(--color-success-light);
  color: var(--color-success-dark);
}

.badge-status-completed::before {
  background: var(--status-completed);
}

.badge-status-cancelled {
  background: var(--color-danger-light);
  color: var(--color-danger-dark);
}

.badge-status-cancelled::before {
  background: var(--status-cancelled);
}

/* ========================================
   EMPTY STATE CARD
   ======================================== */

.card-empty {
  text-align: center;
  padding: var(--space-12);
  background: var(--color-gray-50);
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--radius-lg);
}

.dark .card-empty {
  background: var(--dark-bg-tertiary);
  border-color: var(--dark-border);
}

.card-empty-icon {
  font-size: 48px;
  color: var(--color-gray-400);
  margin-bottom: var(--space-4);
}

.card-empty-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.dark .card-empty-title {
  color: var(--dark-text-secondary);
}

.card-empty-description {
  font-size: var(--text-base);
  color: var(--color-gray-500);
  margin-bottom: var(--space-6);
}

/* ========================================
   SKELETON LOADER CARD
   ======================================== */

.card-skeleton {
  padding: var(--space-6);
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-100);
}

.dark .card-skeleton {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 25%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.dark .skeleton {
  background: linear-gradient(
    90deg,
    var(--dark-bg-tertiary) 25%,
    var(--dark-bg-secondary) 50%,
    var(--dark-bg-tertiary) 75%
  );
  background-size: 200% 100%;
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: var(--space-4);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

/* ========================================
   DASHBOARD WIDGETS
   ======================================== */

.widget-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.dark .widget-card {
  background: var(--dark-bg-secondary);
  border-color: var(--dark-border);
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.widget-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.dark .widget-title {
  color: var(--dark-text-primary);
}

.widget-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 18px;
}

.widget-body {
  flex: 1;
}

/* Stat Widget */
.stat-widget {
  text-align: center;
}

.stat-value {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-gray-900);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.dark .stat-value {
  color: var(--dark-text-primary);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  font-weight: var(--font-semibold);
}

.stat-change {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  margin-top: var(--space-2);
}

.stat-change.positive {
  color: var(--color-success);
}

.stat-change.negative {
  color: var(--color-danger);
}

/* ========================================
   CARD SIZES
   ======================================== */

.card-small {
  width: 100%;
  max-width: 320px;
}

.card-medium {
  width: 100%;
  max-width: 480px;
}

.card-large {
  width: 100%;
  max-width: 640px;
}

/* ========================================
   RESPONSIVE BEHAVIOR
   ======================================== */

@media (max-width: 768px) {
  .card-modern,
  .task-card {
    padding: var(--space-4);
  }
  
  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  
  .task-actions {
    opacity: 1; /* Always show on mobile */
  }
  
  .widget-card {
    padding: var(--space-4);
  }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  .card-modern,
  .task-card {
    transition: none;
  }
  
  .card-modern:hover,
  .task-card:hover {
    transform: none;
  }
  
  .skeleton {
    animation: none;
  }
}