/* ===== Upload Tool — Ecoline Visualizer v2 ===== */

/* Modal */
.upload-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.upload-modal.active {
  display: flex;
}

.upload-modal-content {
  background: #1a1a2e;
  border-radius: 16px;
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  color: #e8e8f0;
}

/* Header */
.upload-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.upload-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}
.upload-close {
  background: none;
  border: none;
  color: #999;
  font-size: 28px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.2s;
}
.upload-close:hover { color: #fff; }

/* Steps */
.upload-step { padding: 24px; }
.upload-step.hidden { display: none; }

/* Dropzone */
.upload-dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 60px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
}
.upload-dropzone:hover,
.upload-dropzone.dragover {
  border-color: #4ECDC4;
  background: rgba(78, 205, 196, 0.06);
}
.dropzone-content svg {
  color: #666;
  margin-bottom: 16px;
}
.dropzone-content p {
  font-size: 16px;
  margin: 0 0 8px;
  color: #ccc;
}
.dropzone-hint {
  font-size: 13px;
  color: #666;
}

/* Toolbar */
.edit-toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 0 0 16px;
}
.toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
}
.toolbar-actions { margin-left: auto; }

.tool-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: #aaa;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.tool-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ddd;
}
.tool-btn.active {
  background: rgba(78, 205, 196, 0.15);
  border-color: #4ECDC4;
  color: #4ECDC4;
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: #888;
  cursor: pointer;
  transition: all 0.2s;
}
.action-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  color: #ddd;
}
.action-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Brush Size */
.brush-size-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #888;
}
.brush-size-label input[type="range"] {
  width: 100px;
  accent-color: #4ECDC4;
}
#brush-size-value {
  display: inline-block;
  min-width: 22px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Mask Layers */
.mask-layers {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 0 12px;
  overflow-x: auto;
}
.mask-layer {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  user-select: none;
}
.mask-layer:hover {
  border-color: rgba(255, 255, 255, 0.2);
}
.mask-layer.active {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
}
.layer-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.layer-name {
  outline: none;
  min-width: 40px;
}
.layer-name:focus {
  border-bottom: 1px solid #4ECDC4;
}
.layer-delete {
  background: none;
  border: none;
  color: #666;
  font-size: 16px;
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
}
.layer-delete:hover { color: #FF6B6B; }

.add-layer-btn {
  padding: 6px 12px;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  background: none;
  color: #666;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.add-layer-btn:hover {
  border-color: #4ECDC4;
  color: #4ECDC4;
}

/* Canvas */
.canvas-container {
  position: relative;
  background: #111;
  border-radius: 8px;
  overflow: hidden;
}
.canvas-container canvas {
  display: block;
  width: 100%;
  height: auto;
}
#canvas-base { position: relative; z-index: 1; }
#canvas-mask { position: absolute; top: 0; left: 0; z-index: 2; pointer-events: none; width: 100%; height: 100%; }
#canvas-cursor { position: absolute; top: 0; left: 0; z-index: 3; cursor: none; width: 100%; height: 100%; }

/* SAM Loading */
.sam-loading {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(0, 0, 0, 0.6);
  color: #4ECDC4;
  font-size: 14px;
}
.sam-loading.hidden { display: none; }

.sam-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(78, 205, 196, 0.2);
  border-top-color: #4ECDC4;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* SAM Hints */
.sam-hints {
  padding: 12px 16px;
  margin-top: 8px;
  background: rgba(78, 205, 196, 0.08);
  border: 1px solid rgba(78, 205, 196, 0.15);
  border-radius: 8px;
  font-size: 14px;
}
.sam-hints.hidden { display: none; }
.sam-hints p { margin: 0; }
.hint-small { font-size: 12px; color: #888; margin-top: 4px !important; }

/* Footer */
.edit-footer {
  display: flex;
  justify-content: space-between;
  padding-top: 16px;
  margin-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-primary,
.btn-secondary {
  padding: 10px 24px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary {
  background: #4ECDC4;
  color: #1a1a2e;
}
.btn-primary:hover:not(:disabled) { background: #3dbdb5; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #999;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.btn-secondary:hover { background: rgba(255, 255, 255, 0.1); color: #ccc; }

/* ===== Trigger button (for main page) ===== */
.upload-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: linear-gradient(135deg, #4ECDC4, #45B7D1);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 16px rgba(78, 205, 196, 0.25);
}
.upload-trigger-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(78, 205, 196, 0.35);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .upload-modal-content {
    max-height: 95vh;
    border-radius: 12px;
  }
  .upload-modal { padding: 8px; }
  .edit-toolbar { gap: 8px; }
  .tool-btn span { display: none; }
  .tool-btn { padding: 8px 10px; }
  .brush-size-label input[type="range"] { width: 70px; }
  .canvas-container canvas { max-height: 45vh; }
}