/* ============================================
   RenDS — DropZone Component
   ============================================
   Drag & drop file upload area.
   Minimal JS for drag events — CSS handles visuals.

   Uses native drag events, no library needed.

   Usage:
     <div class="ren-dropzone" data-accept=".jpg,.png,.pdf" data-max-size="5MB">
       <div class="ren-dropzone-content">
         <span class="ren-dropzone-icon">↑</span>
         <p class="ren-dropzone-title">Drop files here</p>
         <p class="ren-dropzone-description">or click to browse</p>
       </div>
       <input type="file" class="ren-dropzone-input" multiple accept=".jpg,.png,.pdf">
     </div>
   ============================================ */

.ren-dropzone {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 10rem;
  padding: var(--space-6);
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-sunken);
  cursor: pointer;
  transition: var(--transition-tactile);
}

.ren-dropzone:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent-subtle);
}

/* Drag over state (set via JS: element.dataset.dragover = true) */
.ren-dropzone[data-dragover] {
  border-color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  border-style: solid;
}

.ren-dropzone:focus-within {
  outline: var(--ring-width) solid var(--color-focus-ring);
  outline-offset: var(--ring-offset-width);
}

/* Hidden file input covers entire dropzone */
.ren-dropzone-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

/* Content */
.ren-dropzone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
  pointer-events: none;
}

.ren-dropzone-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  background-color: var(--color-fill);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-1);
}

.ren-dropzone[data-dragover] .ren-dropzone-icon {
  color: var(--color-accent);
  background-color: color-mix(in oklch, var(--color-accent), transparent 85%);
}

.ren-dropzone-title {
  font-size: var(--body-size);
  font-weight: var(--weight-medium);
  color: var(--color-text);
}

.ren-dropzone-description {
  font-size: var(--caption-size, var(--text-sm));
  color: var(--color-text-muted);
}

/* ─── File list (after upload) ─── */
.ren-dropzone-files {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  margin-top: var(--space-3);
}

.ren-dropzone-file {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-surface-raised);
  border: var(--stroke-1) solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--caption-size, var(--text-sm));
}

.ren-dropzone-file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ren-dropzone-file-size {
  color: var(--color-text-muted);
  white-space: nowrap;
}

.ren-dropzone-file-remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  padding: 0;
  border: none;
  background: none;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
}

.ren-dropzone-file-remove:hover {
  color: var(--color-danger);
}

/* ─── Compact variant ─── */
.ren-dropzone-compact {
  min-height: auto;
  padding: var(--space-3) var(--space-4);
  flex-direction: row;
  gap: var(--space-3);
}

.ren-dropzone-compact .ren-dropzone-content {
  flex-direction: row;
}

.ren-dropzone-compact .ren-dropzone-icon {
  width: 2rem;
  height: 2rem;
  font-size: var(--text-base);
  margin-bottom: 0;
}

/* ─── Disabled ─── */
.ren-dropzone[aria-disabled="true"],
.ren-dropzone:has(input:disabled) {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ─── Error state ─── */
.ren-dropzone[data-error] {
  border-color: var(--color-danger);
}
/* Appearance API bridge */
.ren-dropzone { padding: var(--ren-dropzone-padding, var(--space-8)); border-radius: var(--ren-dropzone-radius, var(--radius-lg)); border-color: var(--ren-dropzone-border-color, var(--color-border-strong)); border-style: var(--ren-dropzone-border-style, dashed); border-width: var(--ren-dropzone-border-width, 2px); background: var(--ren-dropzone-bg, transparent); }
.ren-dropzone:hover, .ren-dropzone[data-drag-over] { background: var(--ren-dropzone-hover-bg, var(--color-accent-subtle)); border-color: var(--ren-dropzone-hover-border, var(--color-accent)); }