/* ============================================================
   Upload Zone — Drag-and-drop area
   ============================================================ */

.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background-color: var(--color-bg-secondary);
  position: relative;
}

.upload-zone:hover,
.upload-zone:focus-within {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.upload-zone.drag-over {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
  transform: scale(1.01);
  box-shadow: var(--shadow-md);
}

.upload-zone__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

.upload-zone:hover .upload-zone__icon,
.upload-zone.drag-over .upload-zone__icon {
  color: var(--color-primary);
}

.upload-zone__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

.upload-zone__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

.upload-zone__formats {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
}

.upload-zone__input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-zone__browse {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
}