/* ── Drag-and-drop upload area ── */
.upload-area {
  position: relative;
  border: 2px dashed #333;
  border-radius: 12px;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  overflow: hidden;
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: #6366f1;
  background: #6366f108;
}

.upload-area.has-image {
  border-style: solid;
  border-color: #333;
}

#fileInput {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.upload-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: #666;
  pointer-events: none;
}

.upload-label svg {
  width: 40px;
  height: 40px;
  color: #555;
}

.upload-label span {
  font-size: 0.95rem;
}

#preview {
  display: none;
  max-width: 100%;
  max-height: 400px;
  border-radius: 10px;
  pointer-events: none;
}

.upload-area.has-image .upload-label { display: none; }
.upload-area.has-image #preview      { display: block; }

/* ── Grid inputs (cols × rows) ── */
.grid-inputs {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.grid-inputs label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.grid-inputs label span {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #888;
}

.grid-inputs input[type="number"] {
  width: 72px;
  padding: 0.5rem 0.6rem;
  background: #09090b;
  border: 1px solid #333;
  border-radius: 7px;
  color: #e8e8ea;
  font-size: 1.1rem;
  text-align: center;
  outline: none;
  transition: border-color 0.15s;
}

.grid-inputs input[type="number"]:focus { border-color: #6366f1; }

/* ── Background toggle + color/width controls ── */
.bg-inputs {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.9rem;
  color: #ccc;
}

.toggle-label input[type="checkbox"] { display: none; }

.toggle-track {
  width: 34px;
  height: 20px;
  background: #333;
  border-radius: 999px;
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  background: #888;
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}

.toggle-label input:checked + .toggle-track              { background: #6366f1; }
.toggle-label input:checked + .toggle-track .toggle-thumb {
  transform: translateX(14px);
  background: #fff;
}

#bgColorWrap span,
#bgWidthWrap span {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #888;
}

#bgColorWrap input[type="color"] {
  width: 44px;
  height: 32px;
  border: 1px solid #333;
  border-radius: 6px;
  background: none;
  cursor: pointer;
  padding: 2px;
}

#bgWidthWrap {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

#bgWidthWrap input[type="number"] {
  width: 72px;
  padding: 0.5rem 0.6rem;
  background: #09090b;
  border: 1px solid #333;
  border-radius: 7px;
  color: #e8e8ea;
  font-size: 1rem;
  text-align: center;
  outline: none;
  transition: border-color 0.15s;
}

#bgWidthWrap input[type="number"]:focus { border-color: #6366f1; }

.bg-inputs.disabled .color-label,
.bg-inputs.disabled #bgWidthWrap {
  opacity: 0.35;
  pointer-events: none;
}

/* ── Grid info + split button ── */
.grid-info {
  flex: 1;
  color: #777;
  font-size: 0.875rem;
}

#splitBtn {
  padding: 0.6rem 1.4rem;
  background: #6366f1;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  white-space: nowrap;
}

#splitBtn:hover:not(:disabled) { background: #4f52d8; }
#splitBtn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Results grid ── */
.results { margin-top: 2rem; }

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.results-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #ccc;
}

#downloadAllBtn {
  padding: 0.5rem 1rem;
  background: #27272a;
  color: #ccc;
  border: 1px solid #333;
  border-radius: 7px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s;
}

#downloadAllBtn:hover { background: #333; }

.grid-output {
  display: grid;
  gap: 8px;
}

.tile {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: #18181b;
  border: 1px solid #27272a;
}

.tile img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tile-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.4rem 0.5rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
  font-size: 0.7rem;
  color: rgba(255,255,255,0.7);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  opacity: 0;
  transition: opacity 0.15s;
}

.tile:hover .tile-label { opacity: 1; }

.tile-download {
  background: rgba(255,255,255,0.15);
  border: none;
  color: #fff;
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  font-size: 0.7rem;
  cursor: pointer;
  backdrop-filter: blur(4px);
}

.tile-download:hover { background: rgba(255,255,255,0.3); }