.spc-container {
  max-width: 960px;
  margin: 40px auto;
  padding: 20px;
  border: 1px solid #ddd;
  background: #fff;
  border-radius: 8px;
  font-family: sans-serif;
}

.spc-container h2 {
  text-align: center;
  margin-bottom: 20px;
}

.spc-upload-area {
  border: 2px dashed #ccc;
  border-radius: 8px;
  padding: 40px;
  text-align: center;
  background: #f9f9f9;
  margin-bottom: 20px;
  cursor: pointer;
  position: relative;
}

.spc-upload-area.dragover {
  background: #eef6ff;
  border-color: #339af0;
}

.spc-upload-btn {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 16px;
  background: #339af0;
  color: white;
  border-radius: 4px;
  cursor: pointer;
}

.spc-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.spc-controls label {
  display: flex;
  flex-direction: column;
  font-weight: 600;
  font-size: 14px;
}

.spc-buttons {
  grid-column: 1 / -1;
  text-align: center;
  margin-top: 10px;
}

.spc-buttons button {
  margin: 0 10px;
  padding: 10px 20px;
  background: #444;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.spc-buttons button:hover {
  background: #222;
}

.spc-preview-wrapper {
  position: relative;
  width: 100%;
  height: 400px;
  border: 1px solid #ccc;
  background: #eee;
  overflow: hidden;
}

.spc-preview {
  position: absolute;
  inset: 0;
  background-repeat: repeat;
  background-size: 100px 100px;
  background-position: 0 0;
  background-color: transparent;
  z-index: 1; /* lower than overlay */
}

.spc-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none; /* ✅ lets clicks, drags, sliders etc pass through */
  background-color: transparent;
  mix-blend-mode: normal;
  opacity: 0.6; /* example, adjustable */
  z-index: 2; /* ✅ now above the preview */
}

.spc-overlay-toggle {
  grid-column: 1 / -1;
  margin-top: 10px;
  text-align: left;
}

/* Overlay controls: neat single row with sensible gaps */
#spc-overlay-controls{
  display: flex;               /* we'll toggle this on/off in JS */
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;              /* row gap, column gap */
  margin-top: 10px;
}

#spc-overlay-controls label{
  display: inline-flex;
  align-items: center;
  gap: 8px;                    /* space between label text and input */
  margin: 0;
  font-weight: 600;
  white-space: nowrap;         /* keep “Overlay Opacity” together */
}

#spc-overlay-controls select,
#spc-overlay-controls input[type="color"]{
  height: 28px;                /* matches your compact color input */
}

#spc-overlay-opacity{
  width: 220px;                /* slider width; tweak to taste */
}

/* Mobile: stack nicely */
@media (max-width: 700px){
  #spc-overlay-controls{
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  #spc-overlay-opacity{ width: 100%; }
}
.spc-dark-toggle {
  margin-bottom: 20px;
  text-align: right;
}

.spc-container.spc-dark {
  background-color: #1c1c1c;
  color: #ddd;
  border-color: #333;
}

.spc-container.spc-dark select,
.spc-container.spc-dark input[type="color"],
.spc-container.spc-dark input[type="range"],
.spc-container.spc-dark button {
  background-color: #2a2a2a;
  color: #eee;
  border: 1px solid #555;
}

.spc-container.spc-dark .spc-upload-area {
  background: #222;
  color: #aaa;
  border-color: #444;
}

.spc-container.spc-dark .spc-preview-wrapper {
  background-color: #222;
}
/* Responsive adjustments */
@media (max-width: 768px) {
  .spc-container {
    width: 100% !important;
    padding: 10px;
  }

  .spc-controls,
  .spc-preview-wrapper,
  .spc-upload-area {
    width: 100% !important;
    box-sizing: border-box;
  }

  .spc-buttons button {
    width: 100%;
    margin-bottom: 10px;
  }

  .spc-dark-toggle {
    text-align: center;
    margin: 10px 0;
  }
}
.spc-seamless-check {
  font-weight: bold;
  margin-top: 10px;
  font-size: 1rem;
}
.spc-seamless-check.seamless {
  color: #00cc66;
}
.spc-seamless-check.not-seamless {
  color: #cc0000;
}
.spc-seamless-check.overridden {
  color: orange;
  font-weight: bold;
}
:root{
  --spc-grid-x: 100px;         /* horizontal spacing */
  --spc-grid-y: 100px;         /* vertical spacing */
  --spc-grid-thickness: 2px;
  --spc-grid-color: rgba(0,0,0,0.45);
}

.spc-container.spc-dark{
  --spc-grid-color: rgba(255,255,255,0.55);
}

.spc-preview-wrapper.show-grid .spc-preview::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  z-index:3;
  background-image:
    /* horizontal lines (every grid-y) */
    repeating-linear-gradient(
      0deg,
      var(--spc-grid-color),
      var(--spc-grid-color) var(--spc-grid-thickness),
      transparent var(--spc-grid-thickness),
      transparent var(--spc-grid-y)
    ),
    /* vertical lines (every grid-x) */
    repeating-linear-gradient(
      90deg,
      var(--spc-grid-color),
      var(--spc-grid-color) var(--spc-grid-thickness),
      transparent var(--spc-grid-thickness),
      transparent var(--spc-grid-x)
    );
}
/* Nice-looking native color input that always shows the swatch */
.spc-container input[type="color"]{
  -webkit-appearance: auto !important;
  appearance: auto !important;
  inline-size: 2.4rem; /* ~38px */
  block-size: 2rem;    /* ~32px */
  padding: 0;
  border: 1px solid #B8BCC2 !important;
  border-radius: 8px;
  background:
    conic-gradient(#eee 25%, #fff 0 50%, #eee 0 75%, #fff 0) 0 0/10px 10px; /* shows white */
  vertical-align: middle;
}
.spc-container input[type="color"]::-webkit-color-swatch-wrapper{ padding: 0; }
.spc-container input[type="color"]::-webkit-color-swatch{
  border: none;
  border-radius: 7px; /* match outer radius */
}
.spc-container input[type="color"]:focus{
  outline: none;
  box-shadow: 0 0 0 3px rgba(3, 102, 214, .25); /* subtle focus ring */
}

/* Dark mode */
.spc-container.spc-dark input[type="color"]{
  border-color: #5A5F66 !important;
  background:
    conic-gradient(#444 25%, #333 0 50%, #444 0 75%, #333 0) 0 0/10px 10px;
}
/* Compact color input — smaller, like the other fields */
#spc-overlay-color{
  -webkit-appearance: auto !important;
  appearance: auto !important;
  width: 32px;          /* was ~44px */
  height: 20px;         /* was ~32px */
  padding: 0;
  border: 1px solid #B8BCC2 !important;
  border-radius: 4px;
  background:
    conic-gradient(#eee 25%, #fff 0 50%, #eee 0 75%, #fff 0) 0 0/8px 8px; /* checkerboard behind white */
  vertical-align: middle;      /* keeps it aligned with the select/label */
}
#spc-overlay-color::-webkit-color-swatch-wrapper{ padding: 0; }
#spc-overlay-color::-webkit-color-swatch{ border: 0; border-radius: 3px; }

/* Dark mode tweak */
.spc-container.spc-dark #spc-overlay-color{
  border-color: #5A5F66 !important;
  background:
    conic-gradient(#444 25%, #333 0 50%, #444 0 75%, #333 0) 0 0/8px 8px;
}