/* ========== QR Code Generator Tool ========== */
.tool-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.tool-header {
  text-align: center;
  margin-bottom: 24px;
}

.tool-header h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.tool-header .tool-desc {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Layout: settings left, preview right */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 20px;
}

/* Settings Panel */
.tool-settings {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
}

.setting-group {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.setting-group:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.setting-group-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 10px;
}

.setting-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.setting-row label {
  font-size: 13px;
  color: var(--color-text);
  min-width: 70px;
  flex-shrink: 0;
}

.setting-row select,
.setting-row input[type="text"],
.setting-row input[type="number"],
.setting-row input[type="url"],
.setting-row input[type="tel"],
.setting-row input[type="email"] {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 13px;
  background: #fff;
  color: var(--color-text);
}

.setting-row select:focus,
.setting-row input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.15);
}

.setting-row input[type="color"] {
  width: 36px;
  height: 36px;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
}

.setting-row input[type="range"] {
  flex: 1;
  accent-color: var(--color-primary);
}

.range-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  min-width: 30px;
  text-align: right;
}

.setting-row .color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

/* Content type tabs */
.content-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 12px;
}

.content-tab {
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  background: #f3f4f6;
  color: #6b7280;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.content-tab:hover {
  color: #374151;
  background: #e5e7eb;
}

.content-tab.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Content fields */
.content-fields {
  margin-bottom: 12px;
}

.content-fields .field-group {
  display: none;
}

.content-fields .field-group.active {
  display: block;
}

.field-group .setting-row textarea {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 13px;
  background: #fff;
  color: var(--color-text);
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  resize: vertical;
  min-height: 60px;
}

.field-group .setting-row textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.15);
}

/* Preview Panel */
.tool-preview {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.preview-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  width: 100%;
}

.preview-wrapper canvas {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

/* Logo upload */
.logo-upload {
  position: relative;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-upload input[type="file"] {
  display: none;
}

.logo-upload-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 12px;
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.logo-upload-label:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.logo-preview {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  object-fit: contain;
  display: none;
}

.logo-preview.show {
  display: block;
}

/* Download buttons */
.download-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
  width: 100%;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.download-btn-png {
  background: var(--color-primary);
  color: #fff;
}

.download-btn-png:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.download-btn-svg {
  background: #10b981;
  color: #fff;
}

.download-btn-svg:hover {
  background: #059669;
  transform: translateY(-1px);
}

.download-btn-jpg {
  background: #8b5cf6;
  color: #fff;
}

.download-btn-jpg:hover {
  background: #7c3aed;
  transform: translateY(-1px);
}

.download-btn-copy {
  background: #f59e0b;
  color: #fff;
}

.download-btn-copy:hover {
  background: #d97706;
  transform: translateY(-1px);
}

.download-btn-outline {
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.download-btn-outline:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-primary);
}

/* QR Info Panel */
.qr-info {
  margin-top: 12px;
  padding: 12px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  width: 100%;
  font-size: 12px;
  display: none;
}

.qr-info.show {
  display: block;
}

.qr-info .info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 16px;
}

.qr-info .info-item {
  display: flex;
  justify-content: space-between;
  padding: 2px 0;
}

.qr-info .info-label {
  color: var(--color-muted);
}

.qr-info .info-value {
  font-weight: 600;
  color: var(--color-text);
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

/* Template presets */
.template-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.template-btn {
  padding: 5px 10px;
  font-size: 11px;
  font-weight: 500;
  background: #f3f4f6;
  color: #6b7280;
  border: 1px solid #e5e7eb;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.2s;
}

.template-btn:hover {
  background: #e5e7eb;
  color: #374151;
}

.template-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Decode section */
.decode-section {
  margin-top: 20px;
  padding: 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.decode-section h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 12px;
}

.decode-upload {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.decode-upload input[type="file"] {
  display: none;
}

.decode-result {
  padding: 12px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: #16a34a;
  display: none;
  word-break: break-all;
}

.decode-result.show {
  display: block;
}

.decode-result .decode-error {
  color: #dc2626;
}

/* Status message */
.status-box {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 14px;
  display: none;
}

.status-box.show {
  display: block;
}

.status-success {
  background: #f0fdf4;
  border: 1px solid #a6e3a1;
  color: #16a34a;
}

.status-error {
  background: #fef2f2;
  border: 1px solid #f38ba8;
  color: #dc2626;
}

.status-info {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1d4ed8;
}

/* History */
.history-list {
  max-height: 150px;
  overflow-y: auto;
  margin-top: 8px;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  font-size: 12px;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background 0.2s;
}

.history-item:hover {
  background: var(--color-bg-hover);
}

.history-item .h-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: 8px;
  color: var(--color-text);
}

.history-item .h-type {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 3px;
  background: #e5e7eb;
  color: #6b7280;
  flex-shrink: 0;
}

.history-item .h-delete {
  font-size: 14px;
  color: #ef4444;
  cursor: pointer;
  padding: 2px 6px;
  flex-shrink: 0;
}

.history-item .h-delete:hover {
  color: #dc2626;
}

/* History empty */
.history-empty {
  font-size: 12px;
  color: var(--color-muted);
  text-align: center;
  padding: 16px 0;
}

/* Info section */
.tool-info {
  margin-top: 32px;
  padding: 24px;
  background: var(--color-bg-card);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.tool-info h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.tool-info h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-heading);
  margin: 20px 0 12px;
}

.tool-info p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 12px;
}

.tool-info ul {
  margin: 0 0 16px 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.tool-info li {
  margin-bottom: 6px;
}

.tool-info code {
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  color: #be185d;
}

.tool-info .info-tip {
  padding: 12px 16px;
  background: #eff6ff;
  border-radius: 8px;
  color: #1e40af;
  margin-top: 16px;
}

/* Error / Success boxes */
.error-box {
  padding: 16px 20px;
  margin: 16px 0;
  background: #fef2f2;
  border: 1px solid #f38ba8;
  border-radius: 8px;
  color: #dc2626;
}

.success-box {
  padding: 12px 16px;
  margin: 16px 0;
  background: #f0fdf4;
  border: 1px solid #a6e3a1;
  border-radius: 8px;
  color: #16a34a;
  font-weight: 600;
}

/* Shortcut hint */
.shortcut-hint {
  font-size: 11px;
  color: var(--color-muted);
  margin-top: 4px;
  text-align: center;
}

/* Responsive */
@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }
  
  .tool-container {
    padding: 16px;
  }
}

@media (max-width: 600px) {
  .tool-header h1 {
    font-size: 24px;
  }
  
  .tool-container {
    padding: 12px;
  }
  
  .content-tab {
    padding: 5px 8px;
    font-size: 11px;
  }
  
  .setting-row {
    flex-wrap: wrap;
  }
  
  .download-bar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .download-btn {
    justify-content: center;
  }
}