/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.875rem;
  transition: all 0.2s;
  min-height: 44px;
  min-width: 44px;
}

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

.btn-success {
  background: var(--color-success);
  color: white;
}
.btn-success:hover { opacity: 0.9; }

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

.btn-danger {
  background: transparent;
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
}
.btn-danger:hover { background: var(--color-danger); color: white; }

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover { background: var(--color-border-light); }

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: 0.8rem;
  min-height: 36px;
}

.btn-icon {
  padding: var(--space-2);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Cards */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: box-shadow 0.2s;
}

.card-clickable {
  cursor: pointer;
}
.card-clickable:hover {
  box-shadow: var(--shadow-md);
}

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

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-locked {
  background: var(--color-border-light);
  color: var(--color-text-muted);
}

.badge-available {
  background: #EEF2FF;
  color: var(--color-primary);
}

.badge-in-progress {
  background: #FEF3C7;
  color: var(--color-warning);
}

.badge-completed {
  background: #D1FAE5;
  color: var(--color-success);
}

.badge-active {
  background: #DBEAFE;
  color: #1D4ED8;
}

/* Progress Bar */
.progress-container {
  width: 100%;
  height: 8px;
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
  min-width: 0;
}

.progress-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* Form group */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-6);
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
}

.empty-state h3 {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb-sep::after {
  content: '›';
  margin: 0 var(--space-1);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-4);
}

.timeline-dot {
  position: absolute;
  left: calc(-1 * var(--space-8) + 8px);
  top: var(--space-5);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  z-index: 1;
}

.timeline-dot-completed {
  background: var(--color-success);
  border-color: var(--color-success);
}

.timeline-dot-available, .timeline-dot-in-progress {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.timeline-dot-in-progress {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(79, 70, 229, 0); }
}

.timeline-dot-locked {
  background: var(--color-border-light);
  border-color: var(--color-border);
}

/* Step number inside dot */
.timeline-step {
  position: absolute;
  left: calc(-1 * var(--space-8) + 2px);
  top: calc(var(--space-5) - 2px);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: white;
  z-index: 1;
}

.step-completed { background: var(--color-success); }
.step-available, .step-in-progress { background: var(--color-primary); }
.step-in-progress { animation: pulse 2s infinite; }
.step-locked { background: var(--color-border); color: var(--color-text-muted); }

/* Grid */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--color-border-light) 25%, var(--color-border) 50%, var(--color-border-light) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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