/* Component Library - Buttons, Cards, Modals, Forms */

/* ===================================
   Skip Navigation Link (Accessibility)
   =================================== */
.skip-nav-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    z-index: 10000;
    border-radius: 0 0 0.5rem 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: top 0.2s ease-in-out;
}

.skip-nav-link:focus {
    top: 0;
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* === BUTTONS === */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: var(--leading-tight);
  border-radius: var(--border-radius-md);
  border: var(--border-width) solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-active);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--text-inverse);
}

.btn-accent:hover {
  background-color: var(--color-accent-dark);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* === CARDS === */

.card {
  background-color: var(--bg-card);
  border-radius: var(--border-radius-lg);
  border: var(--border-width) solid var(--border-color);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-width) solid var(--border-color-light);
}

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

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.card-body {
  padding: var(--space-2) 0;
}

.card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-width) solid var(--border-color-light);
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
}

/* Card Variants */
.card-interactive {
  cursor: pointer;
}

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

.card-purple {
  border-left: 4px solid var(--color-primary);
}

.card-blue {
  border-left: 4px solid var(--color-accent);
}

.card-success {
  border-left: 4px solid var(--color-success);
}

.card-warning {
  border-left: 4px solid var(--color-warning);
}

/* === METRIC CARDS === */

.metric-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
  border: var(--border-width) solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
}

.metric-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.metric-value {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  font-family: var(--font-mono);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-2);
}

.metric-change {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

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

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

/* === MODALS === */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-overlay);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  backdrop-filter: blur(4px);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  max-height: 90dvh;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform var(--transition-base);
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.modal-backdrop.active .modal {
  transform: scale(1);
}

.modal-header {
  padding: var(--space-6);
  border-bottom: var(--border-width) solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-md);
  border: none;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: var(--text-xl);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--bg-active);
  color: var(--text-primary);
  transform: scale(1.1);
}

.modal-close:focus,
.modal-close:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  background-color: var(--bg-active);
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  overflow-x: hidden;
  flex: 1;
  min-height: 0;

  /* Webkit scrollbar styling */
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.modal-body::-webkit-scrollbar {
  width: 8px;
}

.modal-body::-webkit-scrollbar-track {
  background: transparent;
}

.modal-body::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 4px;
  border: 2px solid transparent;
  background-clip: content-box;
}

.modal-body::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-secondary);
}

/* Modal Body Typography - Fix spacing for parsed markdown content */
.modal-body h1 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-primary);
}

.modal-body h1:first-child {
  margin-top: 0;
}

.modal-body h2 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

.modal-body h3 {
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  color: var(--text-primary);
}

.modal-body h4 {
  margin-top: var(--space-3);
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  line-height: var(--leading-snug);
  color: var(--text-secondary);
}

.modal-body p {
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
}

.modal-body p:last-child {
  margin-bottom: 0;
}

.modal-body ul,
.modal-body ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.modal-body li {
  margin-bottom: var(--space-2);
  line-height: var(--leading-relaxed);
}

.modal-body li:last-child {
  margin-bottom: 0;
}

.modal-body strong {
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.modal-body em {
  font-style: italic;
}

.modal-body blockquote {
  margin: var(--space-4) 0;
  padding-left: var(--space-4);
  border-left: 4px solid var(--color-accent);
  color: var(--text-secondary);
  font-style: italic;
}

.modal-body code {
  padding: var(--space-1) var(--space-2);
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-sm);
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
}

.modal-body pre {
  margin-bottom: var(--space-4);
  padding: var(--space-4);
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  overflow-x: auto;
}

.modal-body pre code {
  padding: 0;
  background-color: transparent;
}

.modal-footer {
  padding: var(--space-6);
  border-top: var(--border-width) solid var(--border-color);
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  background-color: var(--bg-primary);
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
}

/* === BADGES === */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--border-radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

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

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

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

/* === PROGRESS BAR === */

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--border-radius-full);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* === DIVIDER === */

.divider {
  height: var(--border-width);
  background-color: var(--border-color);
  margin: var(--space-6) 0;
}

.divider-vertical {
  width: var(--border-width);
  height: 100%;
  background-color: var(--border-color);
  margin: 0 var(--space-6);
}

/* === TOOLTIP === */

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

.tooltip-text {
  visibility: hidden;
  background-color: var(--color-gray-900);
  color: var(--text-inverse);
  text-align: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--border-radius-md);
  font-size: var(--text-sm);
  position: absolute;
  z-index: var(--z-tooltip);
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

/* === SPINNER === */

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--bg-secondary);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

/* === AVATAR === */

.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-full);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--text-inverse);
  font-weight: var(--font-semibold);
}

.avatar-lg {
  width: 60px;
  height: 60px;
  font-size: var(--text-xl);
}

/* === ENHANCED OPERATIONAL METRICS === */

.metric-card {
  position: relative;
  overflow: hidden;
}

.metric-filter-btn:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.metric-filter-btn:active {
  transform: scale(0.98);
}

.metric-modal-tab {
  flex-shrink: 0;
  min-width: fit-content;
}

.metric-modal-tab:hover {
  background-color: var(--bg-hover);
}

.metric-modal-content {
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive adjustments for metric cards */
@media (max-width: 768px) {
  .metric-card {
    padding: 1rem !important;
  }
  
  .metric-filter-btn {
    padding: 0.5rem 1rem !important;
    font-size: 0.875rem !important;
  }
}

/* === SENSITIVITY CALCULATOR === */

.sensitivity-calculator-grid {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (max-width: 1024px) {
  .sensitivity-calculator-grid {
    grid-template-columns: 1fr;
  }
}

.calculator-controls,
.calculator-results {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.calculator-section-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
}

/* Calculator Controls */
.calculator-control {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

.control-value {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
}

.calculator-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-error) 0%, var(--color-warning) 50%, var(--color-success) 100%);
  outline: none;
  opacity: 0.9;
  transition: opacity 0.2s;
}

.calculator-slider:hover {
  opacity: 1;
}

.calculator-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: white;
  border: 3px solid var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.calculator-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: white;
  border: 3px solid var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.control-range {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-top: -0.25rem;
}

/* Speed Options */
.speed-options {
  display: flex;
  gap: 0.75rem;
}

.speed-option {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.speed-option:hover {
  border-color: var(--color-primary);
  background-color: rgba(123, 44, 191, 0.05);
}

.speed-option input[type="radio"] {
  margin-right: 0.5rem;
}

.speed-option input[type="radio"]:checked + span {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.speed-option:has(input:checked) {
  border-color: var(--color-primary);
  background-color: rgba(123, 44, 191, 0.1);
}

/* Result Cards */
.result-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.result-card {
  padding: 1.25rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  border: 2px solid var(--border-color);
  transition: all var(--transition-fast);
}

.result-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.result-card-primary {
  background: linear-gradient(135deg, rgba(123, 44, 191, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
  border-color: var(--color-primary);
}

.result-label {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.metric-value {
  font-size: 2rem;
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  line-height: 1;
}

.metric-value.positive {
  color: var(--color-success);
}

.metric-value.negative {
  color: var(--color-error);
}

.metric-delta {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  margin-top: 0.5rem;
}

.metric-delta.positive {
  color: var(--color-success);
}

.metric-delta.positive::before {
  content: '▲ ';
}

.metric-delta.negative {
  color: var(--color-error);
}

.metric-delta.negative::before {
  content: '▼ ';
}

/* Tornado Chart Container */
.tornado-chart-container {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

/* Calculator Actions */
.calculator-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 2px solid var(--border-color);
}

@media (max-width: 768px) {
  .calculator-actions {
    flex-direction: column;
  }
}

/* Scenario Cards */
.scenario-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.scenario-card:hover {
  transform: translateY(-4px);
}

.scenario-metrics {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.scenario-metric {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.scenario-metric:last-child {
  border-bottom: none;
}

.scenario-metric .metric-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.scenario-metric .metric-value {
  font-weight: 600;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .scenario-comparison-section > div[style*="grid"] {
    grid-template-columns: 1fr !important;
  }
}

/* Scenario Comparison Table */
.scenario-comparison-table {
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 2rem;
}

.comparison-table th,
.comparison-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table thead th {
  background-color: var(--bg-secondary);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-table tbody tr:hover {
  background-color: rgba(123, 44, 191, 0.05);
}

.comparison-table .metric-name {
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

.comparison-table .positive {
  color: var(--color-success);
  font-weight: var(--font-semibold);
}

.comparison-table .negative {
  color: var(--color-error);
  font-weight: var(--font-semibold);
}

.scenario-insights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.insight-card {
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  border-left: 4px solid var(--color-primary);
}

.insight-card h4 {
  margin: 0 0 0.75rem 0;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.insight-card p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Go/No-Go Timeline */
.gonogo-timeline {
  padding: 1rem 0;
}

.timeline-intro {
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  font-size: var(--text-base);
  color: var(--text-secondary);
}

.timeline-intro p {
  margin: 0;
}

.timeline-gates {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.gate-card {
  padding: 1.5rem;
  border-radius: var(--border-radius-lg);
  border: 2px solid var(--border-color);
  transition: all var(--transition-fast);
}

.gate-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-lg);
}

.gate-card.gate-0 {
  border-left: 6px solid var(--color-warning);
}

.gate-card.gate-1 {
  border-left: 6px solid var(--color-primary);
}

.gate-card.gate-2 {
  border-left: 6px solid var(--color-success);
}

.gate-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.gate-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: white;
  border-radius: var(--border-radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.gate-card.gate-0 .gate-badge {
  background: var(--color-warning);
}

.gate-card.gate-1 .gate-badge {
  background: var(--color-primary);
}

.gate-card.gate-2 .gate-badge {
  background: var(--color-success);
}

.gate-timing {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
}

.gate-card h4 {
  margin: 0 0 1rem 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.gate-criteria {
  margin-bottom: 1rem;
}

.criteria-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.gate-criteria ul {
  margin: 0;
  padding-left: 1.5rem;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.8;
}

.gate-criteria li {
  margin-bottom: 0.25rem;
}

.gate-decision {
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.gate-decision strong {
  color: var(--text-primary);
}

.timeline-footer {
  padding: 1.5rem;
  background: rgba(251, 133, 0, 0.1);
  border-radius: var(--border-radius-lg);
  border: 2px solid var(--color-warning);
}

.timeline-footer p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--text-primary);
  line-height: 1.6;
}

.timeline-footer strong {
  color: var(--color-warning);
}

/* === MISSING BUTTON VARIANTS === */

/* Outline Buttons */
.btn-outline-primary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline-primary:hover {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.btn-outline-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-outline-secondary:hover {
  background-color: var(--bg-active);
  border-color: var(--border-color-dark);
}

.btn-outline-success {
  background-color: transparent;
  color: var(--color-success);
  border-color: var(--color-success);
}

.btn-outline-success:hover {
  background-color: var(--color-success);
  color: var(--text-inverse);
}

.btn-outline-error {
  background-color: transparent;
  color: var(--color-error);
  border-color: var(--color-error);
}

.btn-outline-error:hover {
  background-color: var(--color-error);
  color: var(--text-inverse);
}

/* Ghost Buttons */
.btn-ghost {
  background-color: transparent;
  color: var(--text-primary);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--bg-hover);
}

.btn-ghost-primary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: transparent;
}

.btn-ghost-primary:hover {
  background-color: rgba(var(--color-primary-rgb), 0.1);
}

/* Link Button */
.btn-link {
  background-color: transparent;
  color: var(--color-primary);
  border-color: transparent;
  padding: 0;
  height: auto;
}

.btn-link:hover {
  color: var(--color-primary-dark);
  background-color: transparent;
  transform: none;
  text-decoration: underline;
}

/* Icon Button */
.btn-icon {
  width: var(--button-height-base);
  height: var(--button-height-base);
  padding: 0;
  border-radius: var(--border-radius-md);
}

.btn-icon-sm {
  width: var(--button-height-sm);
  height: var(--button-height-sm);
}

.btn-icon-lg {
  width: var(--button-height-lg);
  height: var(--button-height-lg);
}

/* Loading State */
.btn-loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid currentColor;
  border-radius: 50%;
  border-right-color: transparent;
  animation: btn-spin 0.6s linear infinite;
}

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

/* === MISSING BADGE VARIANTS === */

.badge-error {
  background-color: var(--color-error-lighter);
  color: var(--color-error-darker);
}

.badge-lg {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

/* === ALERT / MESSAGE COMPONENT === */

.alert {
  padding: var(--space-4);
  border-radius: var(--border-radius-md);
  border-left: 4px solid;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.alert-success {
  background-color: rgba(var(--color-success-rgb), 0.1);
  border-left-color: var(--color-success);
  color: var(--color-success-darker);
}

.alert-warning {
  background-color: rgba(var(--color-warning-rgb), 0.1);
  border-left-color: var(--color-warning);
  color: var(--color-warning-darker);
}

.alert-error {
  background-color: rgba(var(--color-error-rgb), 0.1);
  border-left-color: var(--color-error);
  color: var(--color-error-darker);
}

.alert-info {
  background-color: rgba(var(--color-info-rgb), 0.1);
  border-left-color: var(--color-info);
  color: var(--color-info-darker);
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-close {
  margin-left: auto;
  padding: var(--space-1);
  background: transparent;
  border: none;
  cursor: pointer;
  color: inherit;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.alert-close:hover {
  opacity: 1;
}

/* === FORM COMPONENTS === */

/* Form Groups */
.form-group {
  margin-bottom: var(--form-gap);
}

.form-label {
  display: block;
  margin-bottom: var(--label-margin-bottom);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

.form-label-required::after {
  content: '*';
  color: var(--color-error);
  margin-left: var(--space-1);
}

.form-help {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.form-error {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-error);
  font-weight: var(--font-medium);
}

/* Input Fields */
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  height: var(--input-height-base);
  padding: var(--input-padding-y) var(--input-padding-x);
  font-size: var(--text-base);
  font-family: var(--font-primary);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--input-border-radius);
  transition: all var(--transition-fast);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--border-color-dark);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--input-focus-ring);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--bg-secondary);
  cursor: not-allowed;
  opacity: 0.6;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(var(--color-error-rgb), 0.1);
}

.form-input-sm {
  height: var(--input-height-sm);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
}

.form-input-lg {
  height: var(--input-height-lg);
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-5);
}

/* Textarea */
.form-textarea {
  height: auto;
  min-height: 120px;
  resize: vertical;
}

/* Select */
.form-select {
  cursor: pointer;
  padding-right: var(--space-8);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23495057' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 12px;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.form-check-input {
  width: 18px;
  height: 18px;
  cursor: pointer;
  border: var(--border-width) solid var(--border-color);
  transition: all var(--transition-fast);
}

.form-check-input[type="checkbox"] {
  border-radius: var(--border-radius-sm);
}

.form-check-input[type="radio"] {
  border-radius: 50%;
}

.form-check-input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.form-check-input:focus {
  outline: none;
  box-shadow: var(--input-focus-ring);
}

.form-check-label {
  font-size: var(--text-sm);
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
}

/* === CARD SIZE VARIANTS === */

.card-sm {
  padding: var(--card-padding-sm);
}

.card-lg {
  padding: var(--card-padding-lg);
}

.card-flat {
  box-shadow: none;
  border: none;
  background-color: var(--bg-secondary);
}

.card-elevated {
  box-shadow: var(--shadow-lg);
  border: none;
}

/* === ICON BADGE === */

.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-lg);
  background-color: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  font-size: var(--icon-size-lg);
}

.icon-badge-sm {
  width: 36px;
  height: 36px;
  font-size: var(--icon-size-base);
}

.icon-badge-lg {
  width: 64px;
  height: 64px;
  font-size: var(--icon-size-xl);
}

.icon-badge-success {
  background-color: rgba(var(--color-success-rgb), 0.1);
  color: var(--color-success);
}

.icon-badge-warning {
  background-color: rgba(var(--color-warning-rgb), 0.1);
  color: var(--color-warning);
}

.icon-badge-error {
  background-color: rgba(var(--color-error-rgb), 0.1);
  color: var(--color-error);
}

.icon-badge-rounded {
  border-radius: var(--border-radius-full);
}

/* === SKELETON LOADERS === */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--border-radius-md);
}

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

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

.skeleton-text-lg {
  height: 24px;
}

.skeleton-circle {
  border-radius: 50%;
  width: 40px;
  height: 40px;
}

.skeleton-card {
  height: 200px;
}

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

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-8);
  text-align: center;
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-4);
  color: var(--text-tertiary);
  opacity: 0.5;
}

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

.empty-state-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  max-width: 400px;
}

/* === TABLE COMPONENT === */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table thead th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.table tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-width) solid var(--border-color-light);
  color: var(--text-primary);
}

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

.table-striped tbody tr:nth-child(even) {
  background-color: var(--bg-secondary);
}

.table-bordered {
  border: var(--border-width) solid var(--border-color);
}

.table-bordered th,
.table-bordered td {
  border: var(--border-width) solid var(--border-color);
}

/* === DROPDOWN COMPONENT === */

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

.dropdown-toggle {
  cursor: pointer;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: var(--z-dropdown);
  min-width: 200px;
  margin-top: var(--space-2);
  padding: var(--space-2);
  background-color: var(--bg-primary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

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

.dropdown-item {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--bg-hover);
}

.dropdown-item.active {
  background-color: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  font-weight: var(--font-medium);
}

.dropdown-divider {
  height: var(--border-width);
  margin: var(--space-2) 0;
  background-color: var(--border-color);
}

/* === TABS COMPONENT === */

.tabs {
  border-bottom: 2px solid var(--border-color);
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  background-color: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* === MODAL ANIMATIONS === */

@keyframes backdropFadeIn {
  from {
    opacity: 0;
    backdrop-filter: blur(0px);
  }
  to {
    opacity: 1;
    backdrop-filter: blur(4px);
  }
}

@keyframes modalSlideIn {
  from {
    transform: scale(0.9) translateY(20px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.modal-backdrop {
  animation: backdropFadeIn 0.3s ease-out;
}

.modal-backdrop.active .modal {
  animation: modalSlideIn 0.4s cubic-bezier(0.23, 1, 0.320, 1);
}

/* === RESPONSIVE DESIGN === */

@media (max-width: 768px) {
  .modal {
    max-width: 100% !important;
    margin: var(--space-4);
    max-height: calc(100vh - var(--space-8));
  }

  .modal-header {
    padding: var(--space-4);
  }

  .modal-body {
    padding: var(--space-4);
  }

  .modal-footer {
    padding: var(--space-4);
  }

  .modal-title {
    font-size: var(--text-xl);
  }
}

@media (max-width: 640px) {
  .modal {
    max-width: 100% !important;
    margin: var(--space-2);
    max-height: calc(100vh - var(--space-4));
    border-radius: var(--border-radius-lg);
  }

  .modal-header {
    padding: var(--space-3);
    gap: var(--space-3);
  }

  .modal-body {
    padding: var(--space-3);
  }

  .modal-footer {
    padding: var(--space-3);
  }

  .modal-title {
    font-size: var(--text-lg);
  }

  .modal-close {
    width: 32px;
    height: 32px;
    font-size: var(--text-lg);
  }
}