.tool-header {
  max-width: 700px;
  margin-bottom: 28px;
}

.tool-header h1 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.tool-header p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

.tool-panel {
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 30px;
}

.field-label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
}

textarea {
  width: 100%;
  height: 230px;
  padding: 18px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--text);
  resize: vertical;
  background: var(--surface-dim);
  transition: border-color .15s ease, background .15s ease;
}

textarea:focus {
  outline: none;
  border-color: var(--green);
  background: #fff;
}

.preview-panel { display: none; }

.table-wrapper {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: auto;
  max-height: 460px;
}

table { width: 100%; border-collapse: collapse; white-space: nowrap; }

th, td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
  min-width: 120px;
  font-size: 13.5px;
}

th {
  background: var(--surface-dim);
  position: sticky;
  top: 0;
  z-index: 5;
  font-weight: 600;
}

td[contenteditable="true"]:hover { background: var(--surface-dim); cursor: text; }
td[contenteditable="true"]:focus { outline: 2px solid var(--green); outline-offset: -2px; background: #fff; }

.col-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.shift-btn {
  background: var(--border);
  border: none;
  cursor: pointer;
  color: var(--text);
  font-size: 10px;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background .15s ease, color .15s ease;
}
.shift-btn:hover:not(:disabled) { background: var(--green); color: #fff; }
.shift-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  background: var(--surface-dim);
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.file-settings { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.file-settings label { font-size: 13.5px; font-weight: 600; }

.file-settings input {
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  width: 190px;
  outline: none;
  font-family: var(--font-mono);
}
.file-settings input:focus { border-color: var(--green); }

.ext-tag { font-family: var(--font-mono); color: var(--text-muted); font-weight: 600; }

.action-buttons { display: flex; gap: 10px; }

.tool-info { margin-top: 12px; }
.tool-info h2 {
  font-family: var(--font-display);
  font-size: 20px;
  margin-bottom: 20px;
}

/* QR tool specific */
.qr-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
}

.qr-preview-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 30px;
}

#qrCanvasWrap {
  width: 220px;
  height: 220px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}

#qrCanvasWrap canvas, #qrCanvasWrap img { width: 100%; height: 100%; }

.qr-controls { display: flex; flex-direction: column; gap: 16px; }

.field-row { display: flex; flex-direction: column; gap: 6px; }
.field-row input[type="text"], .field-row input[type="url"] {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
}
.field-row input:focus { border-color: var(--green); }

.swatch-row { display: flex; gap: 10px; flex-wrap: wrap; }
.swatch-row input[type="color"] {
  width: 42px; height: 36px; border: 1px solid var(--border); border-radius: 6px; cursor: pointer; padding: 2px;
}

.size-select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
}

@media (max-width: 880px) {
  .qr-layout { grid-template-columns: 1fr; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .action-buttons { justify-content: space-between; }
}