/* =========================================================
   4. Reusable visual components
   ========================================================= */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

@media (max-width: 640px) {
  .card {
    padding: 16px;
  }
}

.grid {
  display: grid;
  gap: 22px;
}

@media (max-width: 640px) {
  .grid {
    gap: 16px;
  }
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 18px;
  border: 0;
  border-radius: 12px;
  font-weight: 700;
  transition: 0.2s;
  min-height: 44px;
}

@media (max-width: 640px) {
  .btn {
    padding: 14px 16px;
    min-height: 44px;
  }
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 10px 22px color-mix(in srgb, var(--primary) 30%, transparent);
  color: #ffffff;
}

.btn-secondary {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
}

.btn-sm {
  padding: 10px 14px;
  font-size: 0.86rem;
  min-height: 40px;
}

.btn-block {
  width: 100%;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  font-size: 0.78rem;
  font-weight: 700;
}

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

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

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

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

.kpi {
  padding: 20px;
}

@media (max-width: 640px) {
  .kpi {
    padding: 16px;
  }
}

.kpi .value {
  font-size: clamp(1.4rem, 5vw, 1.8rem);
  font-weight: 800;
  line-height: 1.2;
}

.kpi .label {
  color: var(--muted);
  font-size: 0.87rem;
}

.icon-box {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 13px;
  background: color-mix(in srgb, var(--primary) 12%, var(--surface));
  color: var(--primary);
  font-size: 1.2rem;
}

.progress {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-2);
}

.progress > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.empty {
  padding: 42px;
  color: var(--muted);
  text-align: center;
}

.skeleton {
  border-radius: 10px;
  background: linear-gradient(90deg, var(--surface-2), var(--surface-3), var(--surface-2));
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
}

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