/* ============================================
   PixelLite — Drop Zone Styles
   ============================================ */

.dropzone {
  position: relative;
  border: 2px dashed rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-lg);
  background: rgba(241, 245, 249, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 3rem 2rem;
  cursor: pointer;
  transition: all var(--transition-base);
  max-width: 700px;
  margin: 0 auto;
  outline: none;
}

.dropzone:hover,
.dropzone:focus-visible {
  border-color: var(--color-primary);
  background: rgba(14, 165, 233, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.dropzone:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Hidden file input */
.dropzone__input {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  overflow: hidden;
}

/* Content */
.dropzone__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  pointer-events: none;
}

.dropzone__icon {
  color: var(--color-primary);
  opacity: 0.7;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.dropzone:hover .dropzone__icon,
.dropzone:focus-visible .dropzone__icon {
  opacity: 1;
  transform: translateY(-2px);
}

.dropzone__text {
  font-size: 1.125rem;
  font-weight: var(--fw-semibold);
  color: var(--color-text);
}

.dropzone__subtext {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
}

.dropzone__paste-hint {
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  opacity: 0.7;
}

/* Active (drag over) state */
.dropzone--active {
  border-style: solid;
  border-color: var(--color-primary);
  background: rgba(14, 165, 233, 0.06);
  transform: scale(1.01);
}

.dropzone--active .dropzone__icon {
  opacity: 1;
  transform: translateY(-4px);
  animation: dropzoneFloat 1s ease-in-out infinite alternate;
}

@keyframes dropzoneFloat {
  from { transform: translateY(-4px); }
  to { transform: translateY(-8px); }
}

/* Error state */
.dropzone--error {
  border-color: var(--color-error);
  background: rgba(239, 68, 68, 0.04);
  animation: dropzoneShake 0.3s ease;
}

@keyframes dropzoneShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* Collapsed state (files added, acts as "add more" zone) */
.dropzone--collapsed {
  padding: 1rem;
  max-width: none;
  border-style: dashed;
  border-color: var(--color-border);
  background: var(--color-surface);
}

.dropzone--collapsed .dropzone__icon {
  width: 24px;
  height: 24px;
}

.dropzone--collapsed .dropzone__text {
  font-size: var(--fs-small);
}

.dropzone--collapsed .dropzone__subtext,
.dropzone--collapsed .dropzone__paste-hint {
  display: none;
}

.dropzone--collapsed .dropzone__content {
  flex-direction: row;
  gap: 0.5rem;
}

/* Dark mode */
[data-theme="dark"] .dropzone {
  border-color: rgba(14, 165, 233, 0.2);
  background: var(--color-dropzone-bg);
}

[data-theme="dark"] .dropzone:hover,
[data-theme="dark"] .dropzone:focus-visible {
  border-color: var(--color-primary);
  background: rgba(14, 165, 233, 0.06);
}

[data-theme="dark"] .dropzone--active {
  border-color: var(--color-primary);
  background: rgba(14, 165, 233, 0.08);
}

[data-theme="dark"] .dropzone--collapsed {
  border-color: var(--color-border);
  background: var(--color-surface);
}

/* Mobile adjustments */
@media (max-width: 767px) {
  .dropzone {
    padding: 2rem 1.25rem;
  }

  .dropzone__text {
    font-size: 1rem;
  }
}