/* ========== Image to Base64 Tool Page ========== */
.tool-container {
  max-width: 1400px;
  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;
}

/* Toolbar */
.tool-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 16px;
  padding: 16px;
  background: var(--color-bg-card);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

.tool-btn-secondary {
  background: #10b981;
  color: #fff;
}

.tool-btn-secondary:hover {
  background: #059669;
}

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

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

.tool-btn-danger {
  background: #ef4444;
  color: #fff;
}

.tool-btn-danger:hover {
  background: #dc2626;
}

.tool-btn-purple {
  background: #8b5cf6;
  color: #fff;
}

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

.tool-btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

/* Mode tabs */
.mode-tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: #f3f4f6;
  border-radius: 8px;
  margin-bottom: 16px;
  position: relative;
}

.mode-tab {
  flex: 1;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  background: transparent;
  color: #6b7280;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.mode-tab:hover {
  color: #374151;
  background: rgba(0,0,0,0.03);
}

.mode-tab.active {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

/* File upload zone */
.file-upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 60px 24px;
  background: var(--color-bg-card);
  border: 2px dashed var(--color-border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 220px;
  margin-bottom: 16px;
}

.file-upload-zone:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-active);
}

.file-upload-zone.dragover {
  border-color: var(--color-primary);
  background: #eff6ff;
  transform: scale(1.01);
}

.file-upload-zone .upload-icon {
  font-size: 56px;
  color: var(--color-primary);
  opacity: 0.5;
  line-height: 1;
}

.file-upload-zone .upload-text {
  font-size: 18px;
  color: var(--color-text);
}

.file-upload-zone .upload-text span {
  color: var(--color-primary);
  font-weight: 600;
  cursor: pointer;
}

.file-upload-zone .upload-hint {
  font-size: 13px;
  color: var(--color-muted);
}

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

/* Preview area */
.preview-area {
  display: flex;
  gap: 20px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.preview-image {
  flex: 0 0 280px;
  max-width: 280px;
}

.preview-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  display: block;
}

.file-info-panel {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.file-info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.file-info-item .info-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.file-info-item .info-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  word-break: break-all;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

/* Options bar */
.options-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
  padding: 14px 18px;
  background: var(--color-bg-card);
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.option-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text);
}

.option-group label {
  white-space: nowrap;
  font-size: 13px;
  color: var(--color-muted);
  font-weight: 500;
}

.option-group input[type="range"] {
  width: 120px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.option-group input[type="number"] {
  width: 70px;
  padding: 4px 8px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 13px;
  text-align: center;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

.option-group input[type="number"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

.option-group select {
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 13px;
  background: #fff;
  cursor: pointer;
  color: var(--color-text);
}

.option-group .range-value {
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  min-width: 32px;
  text-align: right;
}

/* Output mode toggle */
.output-mode-bar {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: #f3f4f6;
  border-radius: 8px;
  margin-bottom: 10px;
}

.output-mode-btn {
  flex: 1;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  background: transparent;
  color: #6b7280;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  white-space: nowrap;
}

.output-mode-btn:hover {
  color: #374151;
  background: rgba(0,0,0,0.03);
}

.output-mode-btn.active {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

/* Output textarea */
.output-textarea-wrap {
  position: relative;
}

.output-textarea-wrap textarea {
  width: 100%;
  height: 160px;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
  background: #1e1e2e;
  color: #a6e3a1;
  word-break: break-all;
  box-sizing: border-box;
}

.output-textarea-wrap textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Compression stats */
.compression-stats {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-muted);
}

.compression-stats .stat-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}

.stat-badge-expand {
  background: #fef3c7;
  color: #92400e;
}

.stat-badge-same {
  background: #dbeafe;
  color: #1e40af;
}

.stat-badge-shrink {
  background: #d1fae5;
  color: #065f46;
}

/* ===== Decode Panel ===== */
.decode-textarea {
  width: 100%;
  height: 160px;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
  background: #fff;
  color: var(--color-text);
  word-break: break-all;
  box-sizing: border-box;
  margin-bottom: 12px;
}

.decode-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.decode-textarea::placeholder {
  color: #9ca3af;
}

#decodePreviewWrap {
  display: flex;
  gap: 20px;
  margin-top: 16px;
  align-items: flex-start;
}

.decode-preview-image {
  flex: 0 0 240px;
  max-width: 240px;
}

.decode-preview-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  display: block;
}

.decode-info-panel {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* Status */
.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 #bbf7d0;
  color: #16a34a;
}

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

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

/* 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 h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-heading);
  margin: 16px 0 8px;
}

.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 pre {
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  line-height: 1.6;
  overflow-x: auto;
  margin: 8px 0 16px;
}

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

/* Responsive - 900px */
@media (max-width: 900px) {
  .preview-area {
    flex-direction: column;
    align-items: center;
  }

  .preview-image {
    flex: 0 0 auto;
    max-width: 100%;
    width: 100%;
  }

  .preview-image img {
    max-height: 300px;
    object-fit: contain;
  }

  .file-info-panel {
    width: 100%;
    grid-template-columns: 1fr 1fr;
  }

  #decodePreviewWrap {
    flex-direction: column;
    align-items: center;
  }

  .decode-preview-image {
    flex: 0 0 auto;
    max-width: 100%;
    width: 100%;
  }

  .options-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .option-group {
    flex-wrap: wrap;
  }

  .option-group input[type="range"] {
    flex: 1;
  }
}

/* Responsive - 600px */
@media (max-width: 600px) {
  .tool-container {
    padding: 16px;
  }

  .tool-header h1 {
    font-size: 24px;
  }

  .tool-header .tool-desc {
    font-size: 14px;
  }

  .tool-toolbar {
    padding: 12px;
    gap: 8px;
  }

  .tool-btn {
    padding: 8px 14px;
    font-size: 13px;
  }

  .mode-tab {
    padding: 8px 12px;
    font-size: 13px;
  }

  .output-mode-btn {
    padding: 6px 10px;
    font-size: 12px;
  }

  .options-bar {
    padding: 10px 12px;
    gap: 12px;
  }

  .file-upload-zone {
    padding: 36px 16px;
    min-height: 160px;
  }

  .file-upload-zone .upload-text {
    font-size: 15px;
  }

  .file-info-panel {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .decode-info-panel {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .output-textarea-wrap textarea {
    height: 120px;
  }

  .decode-textarea {
    height: 120px;
  }

  .option-group input[type="range"] {
    width: 80px;
  }
}