/* ===== Tool section (Eliminador de Fondo specific) ===== */
.tool-section { padding-block: 20px 56px; }

.hint { margin-top: 10px; font-size: 0.8rem; color: var(--ink-400); }
.hint.is-warning { color: var(--ad-text); font-weight: 600; }
.hint.model-note { text-align: center; margin-top: 24px; }
.file-input { display: none; }

.upload-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 20px;
}
@media (min-width: 780px) {
  .upload-grid { grid-template-columns: 1fr 1fr; }
}

.upload-slot {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 26px;
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Empty state */
.upload-empty {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  padding: 30px 10px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-alt);
}

/* Processing state */
.upload-processing {
  width: 100%;
  text-align: center;
  font-weight: 600;
  font-size: 0.92rem;
}
.progress-bar {
  margin-top: 14px;
  height: 8px;
  border-radius: 999px;
  background: var(--bg-alt);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--primary);
  border-radius: 999px;
  transition: width 0.3s ease;
}
.resize-note { margin-top: 14px; }

/* Result state */
.upload-result { width: 100%; }
.compare-slider {
  position: relative;
  aspect-ratio: 1;
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  background-color: #fff;
  background-image:
    linear-gradient(45deg, #eee 25%, transparent 25%),
    linear-gradient(-45deg, #eee 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #eee 75%),
    linear-gradient(-45deg, transparent 75%, #eee 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}
.compare-after,
.compare-before {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.compare-before-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  clip-path: inset(0 calc(100% - var(--pos, 50%)) 0 0);
}
.compare-range {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
}
.compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--pos, 50%);
  width: 3px;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(28, 27, 31, 0.25);
  pointer-events: none;
  transform: translateX(-50%);
}
.compare-handle::after {
  content: "↔";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--ink-900);
}

/* Error state */
.upload-error { width: 100%; text-align: center; }

.download-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 16px; }