/* background : styles propres à l'outil, isolés sous .fdm-tool--background */
.fdm-tool--background {
  min-height: 100vh;
  padding: 2rem 1rem;
  position: relative;
  overflow-x: hidden;
}

.fdm-tool--background .container {
  position: relative;
  z-index: 1;
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 3rem 2.75rem;
  max-width: 760px;
  width: 100%;
  margin: 2rem auto;
  text-align: center;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.fdm-tool--background .badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--surface-2);
  border: 1px solid var(--border-medium);
  border-radius: 100px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.fdm-tool--background .badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-tertiary);
  transition: all var(--transition);
}

.fdm-tool--background .badge.is-downloading .dot,
.fdm-tool--background .badge.is-processing .dot {
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulse 0.9s ease-in-out infinite;
}
.fdm-tool--background .badge.is-ready .dot {
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
}
.fdm-tool--background .badge.is-error .dot {
  background: var(--accent-rose);
  box-shadow: 0 0 10px var(--accent-rose);
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

.fdm-tool--background h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.fdm-tool--background .subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Info bandeau premier chargement */
.fdm-tool--background .info-banner {
  padding: 0.85rem 1rem;
  background: rgba(88, 166, 255, 0.06);
  border: 1px solid rgba(88, 166, 255, 0.25);
  border-radius: 10px;
  margin-bottom: 1.5rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-align: left;
  line-height: 1.55;
}

.fdm-tool--background .info-banner strong {
  color: var(--accent-cyan);
}

/* Drop zone */
.fdm-tool--background .upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  padding: 2.5rem 1.5rem;
  background: linear-gradient(
    180deg,
    rgba(5, 8, 16, 0.4) 0%,
    rgba(5, 8, 16, 0.15) 100%
  );
  border: 2px dashed var(--border-medium);
  border-radius: 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.fdm-tool--background .upload-zone:hover {
  border-color: var(--border-accent);
  background: linear-gradient(
    180deg,
    rgba(88, 166, 255, 0.06) 0%,
    rgba(167, 139, 250, 0.04) 100%
  );
}

.fdm-tool--background .upload-zone.dragover {
  border-color: var(--accent-cyan);
  border-style: solid;
  background: linear-gradient(
    180deg,
    rgba(88, 166, 255, 0.12) 0%,
    rgba(167, 139, 250, 0.08) 100%
  );
  box-shadow: 0 0 32px var(--glow-cyan);
}

.fdm-tool--background .upload-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    rgba(88, 166, 255, 0.12) 0%,
    rgba(167, 139, 250, 0.08) 100%
  );
  border: 1px solid var(--border-medium);
  border-radius: 14px;
  color: var(--accent-cyan);
}

.fdm-tool--background .upload-icon svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.fdm-tool--background .upload-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.fdm-tool--background .upload-hint {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

.fdm-tool--background .upload-hint kbd {
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  font-family: inherit;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.fdm-tool--background #fileInput {
  display: none;
}

/* Workspace */
.fdm-tool--background .workspace[hidden] {
  display: none;
}

.fdm-tool--background .image-info {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  text-align: left;
  margin-bottom: 1rem;
}

.fdm-tool--background .image-info .thumb {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
  background: #000;
  flex-shrink: 0;
}

.fdm-tool--background .image-info .meta-name {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fdm-tool--background .image-info .meta-detail {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

.fdm-tool--background .replace-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-tertiary);
  padding: 0.4rem 0.7rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.75rem;
  font-family: "JetBrains Mono", monospace;
  transition: all var(--transition);
}

.fdm-tool--background .replace-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--border-accent);
}

/* Section header */
.fdm-tool--background .section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.5rem 0 0.85rem;
  text-align: left;
}

.fdm-tool--background .section-header h2 {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.fdm-tool--background .section-header::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-violet);
  box-shadow: 0 0 8px var(--accent-violet);
}

.fdm-tool--background .section-header::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-medium) 0%, transparent 100%);
}

/* Comparaison avant/après */
.fdm-tool--background .comparison-wrap {
  position: relative;
  padding: 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  margin-bottom: 1rem;
}

.fdm-tool--background .comparison {
  position: relative;
  width: 100%;
  max-width: 100%;
  border-radius: 8px;
  overflow: hidden;
  user-select: none;
  touch-action: none;
  background: #000;
}

/* Damier pour la transparence */
.fdm-tool--background .checkerboard {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, rgba(255, 255, 255, 0.06) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.06) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.06) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255, 255, 255, 0.06) 75%);
  background-size: 20px 20px;
  background-position:
    0 0,
    0 10px,
    10px -10px,
    -10px 0px;
}

.fdm-tool--background .comparison-before,
.fdm-tool--background .comparison-after {
  width: 100%;
  height: auto;
  display: block;
}

.fdm-tool--background .comparison-after-wrap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  clip-path: inset(0 0 0 50%);
  overflow: hidden;
}

.fdm-tool--background .comparison-handle {
  position: absolute;
  top: 0;
  left: 50%;
  bottom: 0;
  width: 3px;
  background: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
  transform: translateX(-50%);
  cursor: ew-resize;
  z-index: 2;
}

.fdm-tool--background .comparison-handle::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 38px;
  height: 38px;
  background: var(--accent-cyan);
  border-radius: 50%;
  border: 3px solid var(--bg-base);
  box-shadow: 0 0 16px var(--accent-cyan);
}

.fdm-tool--background .comparison-handle::after {
  content: "⇆";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--bg-base);
  font-size: 18px;
  font-weight: 700;
  z-index: 3;
  pointer-events: none;
}

.fdm-tool--background .comparison-label {
  position: absolute;
  top: 0.6rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  pointer-events: none;
  z-index: 1;
}

.fdm-tool--background .comparison-label.before {
  left: 0.6rem;
  background: rgba(10, 14, 26, 0.75);
  color: var(--text-secondary);
}

.fdm-tool--background .comparison-label.after {
  right: 0.6rem;
  background: rgba(52, 211, 153, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

/* État processing : overlay */
.fdm-tool--background .processing-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.fdm-tool--background .processing-overlay[hidden] {
  display: none;
}

.fdm-tool--background .spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-medium);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.fdm-tool--background .processing-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  color: var(--text-primary);
  text-align: center;
  max-width: 80%;
}

.fdm-tool--background .progress-bar {
  width: 220px;
  height: 4px;
  background: var(--border-medium);
  border-radius: 100px;
  overflow: hidden;
}

.fdm-tool--background .progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-violet));
  border-radius: 100px;
  transition: width 200ms ease-out;
  box-shadow: 0 0 8px var(--accent-cyan);
}

/* Stats */
.fdm-tool--background .stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

@media (max-width: 480px) {
  .fdm-tool--background .stats {
    grid-template-columns: 1fr;
  }
}

.fdm-tool--background .stat {
  padding: 0.7rem 0.85rem;
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.fdm-tool--background .stat-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.fdm-tool--background .stat-value {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

/* Boutons */
.fdm-tool--background .buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

@media (max-width: 480px) {
  .fdm-tool--background .buttons {
    grid-template-columns: 1fr;
  }
}

.fdm-tool--background button.action {
  padding: 0.95rem 1.25rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid var(--border-medium);
  border-radius: 12px;
  background: var(--surface-2);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.fdm-tool--background button.action:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: var(--border-accent);
  transform: translateY(-1px);
}

.fdm-tool--background button.action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.fdm-tool--background button.action.primary {
  background: linear-gradient(
    135deg,
    rgba(88, 166, 255, 0.25) 0%,
    rgba(167, 139, 250, 0.18) 100%
  );
  border-color: var(--border-accent);
  font-weight: 600;
}

.fdm-tool--background button.action.primary:hover:not(:disabled) {
  background: linear-gradient(
    135deg,
    rgba(88, 166, 255, 0.35) 0%,
    rgba(167, 139, 250, 0.25) 100%
  );
  box-shadow: 0 0 24px var(--glow-cyan);
}

.fdm-tool--background button.action.danger:hover {
  background: rgba(248, 113, 113, 0.08);
  border-color: rgba(248, 113, 113, 0.35);
  color: var(--accent-rose);
}

/* Erreur */
.fdm-tool--background .error-msg {
  padding: 0.85rem 1rem;
  border-radius: 10px;
  text-align: center;
  font-size: 0.88rem;
  border: 1px solid rgba(248, 113, 113, 0.35);
  background: rgba(248, 113, 113, 0.06);
  color: var(--accent-rose);
  margin-bottom: 1rem;
}

/* Retour */
.fdm-tool--background .back-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding: 0.55rem 1.1rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  text-decoration: none;
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  background: var(--surface-1);
  color: var(--text-secondary);
  transition: all var(--transition);
}

.fdm-tool--background .back-button:hover {
  background: var(--surface-2);
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.fdm-tool--background .back-button .arrow {
  transition: transform var(--transition);
}
.fdm-tool--background .back-button:hover .arrow {
  transform: translateX(-3px);
}

@media (max-width: 600px) {
  .fdm-tool--background .container {
    padding: 2rem 1.25rem;
  }
  .fdm-tool--background h1 {
    font-size: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fdm-tool--background .spinner {
    animation: none !important;
  }
}