/* =============================================================================
   Component Styles - Reusable UI Components
   ============================================================================= */

/* =============================================================================
   Loading States and Animations
   ============================================================================= */

.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-light);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s linear infinite;
}

.loading-skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--border-light) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: loading-shimmer 2s infinite;
}

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

.skeleton-text {
  height: 1em;
  margin-bottom: 0.5em;
  border-radius: 4px;
}

.skeleton-text.short {
  width: 60%;
}

.skeleton-text.medium {
  width: 80%;
}

.skeleton-text.long {
  width: 100%;
}

/* =============================================================================
   Alert and Notification Components
   ============================================================================= */

.alert {
  padding: var(--spacing-md);
  border: 1px solid;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.alert-message {
  margin-bottom: 0;
}

.alert-success {
  background-color: rgba(46, 204, 113, 0.1);
  border-color: var(--normal-color);
  color: var(--normal-color);
}

.alert-warning {
  background-color: rgba(243, 156, 18, 0.1);
  border-color: var(--overweight-color);
  color: var(--overweight-color);
}

.alert-error {
  background-color: rgba(231, 76, 60, 0.1);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.alert-info {
  background-color: rgba(52, 152, 219, 0.1);
  border-color: var(--secondary-color);
  color: var(--secondary-color);
}

.alert-dismissible {
  position: relative;
  padding-right: var(--spacing-xxl);
}

.alert-close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
}

.alert-close:hover,
.alert-close:focus {
  background-color: rgba(0, 0, 0, 0.1);
}



/* =============================================================================
   Progress and Status Components
   ============================================================================= */

.progress {
  width: 100%;
  height: 8px;
  background-color: var(--border-light);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--spacing-xs);
}

.progress-bar {
  height: 100%;
  background-color: var(--primary-color);
  transition: width var(--transition-normal);
  border-radius: 4px;
}

.progress-bar.animated {
  background-image: linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.15) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.15) 50%,
    rgba(255, 255, 255, 0.15) 75%,
    transparent 75%,
    transparent
  );
  background-size: 1rem 1rem;
  animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
  0% { background-position: 1rem 0; }
  100% { background-position: 0 0; }
}

.progress-circular {
  position: relative;
  width: 60px;
  height: 60px;
}

.progress-circular svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-circular .progress-bg {
  fill: none;
  stroke: var(--border-light);
  stroke-width: 4;
}

.progress-circular .progress-fill {
  fill: none;
  stroke: var(--primary-color);
  stroke-width: 4;
  stroke-linecap: round;
  transition: stroke-dashoffset var(--transition-normal);
}

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  gap: var(--spacing-xs);
}

.status-badge.active {
  background-color: var(--primary-color);
  color: var(--white);
}

.status-badge.completed {
  background-color: var(--normal-color);
  color: var(--white);
}

.status-badge.paused {
  background-color: var(--overweight-color);
  color: var(--white);
}

.status-badge.overdue {
  background-color: var(--accent-color);
  color: var(--white);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: currentColor;
}

/* =============================================================================
   Data Display Components
   ============================================================================= */

.metric-card {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  text-align: center;
  transition: all var(--transition-fast);
}

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

.metric-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
  line-height: 1;
}

.metric-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.metric-change {
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.metric-change.positive {
  color: var(--normal-color);
}

.metric-change.negative {
  color: var(--accent-color);
}

.metric-change.neutral {
  color: var(--text-secondary);
}

.change-arrow {
  font-size: 12px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.data-table th,
.data-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.data-table th {
  background-color: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.data-table tr:hover {
  background-color: var(--bg-secondary);
}

.data-table .sortable {
  cursor: pointer;
  user-select: none;
  position: relative;
}

.data-table .sortable:hover {
  background-color: var(--border-light);
}

.data-table .sortable::after {
  content: '';
  position: absolute;
  right: var(--spacing-xs);
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-bottom: 4px solid var(--text-secondary);
  opacity: 0.5;
}

.data-table .sortable.asc::after {
  border-bottom: 4px solid var(--text-primary);
  opacity: 1;
}

.data-table .sortable.desc::after {
  border-bottom: none;
  border-top: 4px solid var(--text-primary);
  opacity: 1;
}

.empty-state {
  text-align: center;
  padding: var(--spacing-xxl);
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.empty-state-description {
  margin-bottom: var(--spacing-lg);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* =============================================================================
   Interactive Components
   ============================================================================= */

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  background: var(--white);
  border: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-width: 120px;
  justify-content: space-between;
}

.dropdown-toggle:hover,
.dropdown-toggle:focus {
  border-color: var(--primary-color);
}

.dropdown-arrow {
  font-size: 12px;
  transition: transform var(--transition-fast);
}

.dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  max-height: 300px;
  overflow-y: auto;
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: background-color var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.dropdown-item:hover,
.dropdown-item:focus {
  background-color: var(--bg-secondary);
  color: var(--primary-color);
}

.dropdown-item.active {
  background-color: var(--primary-color);
  color: var(--white);
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-light);
  margin: var(--spacing-xs) 0;
}

.tabs {
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-lg);
}

.tab-list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: var(--spacing-sm);
}

.tab-item {
  margin-bottom: -1px;
}

.tab-link {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.tab-link:hover,
.tab-link:focus {
  color: var(--primary-color);
  border-color: var(--border-light);
  text-decoration: none;
}

.tab-link.active {
  color: var(--primary-color);
  background-color: var(--white);
  border-color: var(--border-color) var(--border-color) var(--white);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

.accordion {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid var(--border-color);
}

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

.accordion-header {
  background: var(--bg-secondary);
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  width: 100%;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 500;
  transition: background-color var(--transition-fast);
}

.accordion-header:hover,
.accordion-header:focus {
  background-color: var(--border-light);
}

.accordion-header.active {
  background-color: var(--primary-color);
  color: var(--white);
}

.accordion-icon {
  transition: transform var(--transition-fast);
}

.accordion-header.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.accordion-content.active {
  max-height: 500px;
}

.accordion-body {
  padding: var(--spacing-lg);
}

/* =============================================================================
   Form Components
   ============================================================================= */

.form-floating {
  position: relative;
}

.form-floating input,
.form-floating select,
.form-floating textarea {
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm) var(--spacing-md);
  height: auto;
}

.form-floating label {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  padding: var(--spacing-md);
  pointer-events: none;
  border: 1px solid transparent;
  transform-origin: 0 0;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  background-color: transparent;
}

.form-floating input:focus + label,
.form-floating input:not(:placeholder-shown) + label,
.form-floating select:focus + label,
.form-floating select:not([value=""]) + label,
.form-floating textarea:focus + label,
.form-floating textarea:not(:placeholder-shown) + label {
  transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
  color: var(--primary-color);
  background-color: var(--white);
  padding: 0 var(--spacing-xs);
}

.input-group {
  display: flex;
  position: relative;
}

.input-group input {
  flex: 1;
  border-radius: 0;
}

.input-group input:first-child {
  border-top-left-radius: var(--border-radius);
  border-bottom-left-radius: var(--border-radius);
}

.input-group input:last-child {
  border-top-right-radius: var(--border-radius);
  border-bottom-right-radius: var(--border-radius);
}

.input-group-prepend,
.input-group-append {
  display: flex;
  align-items: center;
}

.input-group-text {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.input-group-prepend .input-group-text {
  border-right: none;
  border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.input-group-append .input-group-text {
  border-left: none;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-color);
  transition: var(--transition-fast);
  border-radius: 24px;
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: var(--white);
  transition: var(--transition-fast);
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.switch input:checked + .switch-slider {
  background-color: var(--primary-color);
}

.switch input:checked + .switch-slider:before {
  transform: translateX(20px);
}

.switch input:focus + .switch-slider {
  box-shadow: 0 0 0 2px rgba(44, 122, 44, 0.2);
}

/* =============================================================================
   Utility Components
   ============================================================================= */

.divider {
  height: 1px;
  background-color: var(--border-light);
  margin: var(--spacing-lg) 0;
}

.divider.vertical {
  width: 1px;
  height: auto;
  margin: 0 var(--spacing-lg);
}

.spacer {
  flex: 1;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.avatar.large {
  width: 60px;
  height: 60px;
  font-size: var(--font-size-base);
}

.avatar.small {
  width: 32px;
  height: 32px;
  font-size: 12px;
}

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip-text {
  visibility: hidden;
  width: 200px;
  background-color: rgba(0, 0, 0, 0.9);
  color: var(--white);
  text-align: center;
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  position: absolute;
  z-index: 1000;
  bottom: 125%;
  left: 50%;
  margin-left: -100px;
  opacity: 0;
  transition: opacity var(--transition-fast);
  font-size: var(--font-size-sm);
  line-height: 1.4;
}

.tooltip-text::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: rgba(0, 0, 0, 0.9) transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge.primary {
  background-color: var(--primary-color);
  color: var(--white);
}

.badge.secondary {
  background-color: var(--text-secondary);
  color: var(--white);
}

.badge.success {
  background-color: var(--normal-color);
  color: var(--white);
}

.badge.warning {
  background-color: var(--overweight-color);
  color: var(--white);
}

.badge.danger {
  background-color: var(--accent-color);
  color: var(--white);
}

.badge.info {
  background-color: var(--secondary-color);
  color: var(--white);
}

.badge.light {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.badge.dark {
  background-color: var(--dark-gray);
  color: var(--white);
}