.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
  }
  .tool-header {
    text-align: center;
    padding: clamp(24px, 6vw, 48px) 0 clamp(16px, 4vw, 32px);
  }
  .tool-header h1 {
    font-size: clamp(28px, 6vw, 42px);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-color);
    margin-bottom: 16px;
  }
  .badge {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    font-size: 0.65em;
    padding: 4px 12px;
    border-radius: 40px;
    color: white;
    vertical-align: middle;
    margin-left: 8px;
  }
  .lead {
    font-size: clamp(0.9rem, 3vw, 1.1rem);
    color: var(--gray);
    max-width: 800px;
    margin: 0 auto;
  }

  .remover-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin: 32px 0 48px;
  }
  @media (max-width: 900px) {
    .remover-grid {
      grid-template-columns: 1fr;
      gap: 24px;
    }
  }
  .card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    overflow: hidden;
  }
  .card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-color);
  }
  .card-body {
    padding: clamp(16px, 4vw, 24px);
  }
  .dropzone-modern {
    background: var(--card-bg);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: clamp(24px, 6vw, 48px) clamp(16px, 4vw, 24px);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
  }
  .dropzone-modern:hover {
    border-color: var(--primary);
    background: rgba(67, 97, 238, 0.05);
  }
  .dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
  .icon-lg {
    font-size: clamp(36px, 10vw, 48px);
    background: var(--bg-light);
    width: clamp(60px, 15vw, 80px);
    height: clamp(60px, 15vw, 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 60px;
  }
  .preview-area {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    min-height: 450px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }
  #previewCanvas {
    max-width: 100%;
    max-height: 500px;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    display: block;
    margin: 0 auto;
  }
  .method-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
  }
  .method-btn {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: 8px 16px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
  }
  .method-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
  }
  .control-group {
    margin-bottom: 20px;
  }
  .control-group label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 8px;
    color: var(--gray);
  }
  input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 10px;
    background: var(--border-color);
    -webkit-appearance: none;
  }
  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
  }
  .brush-mode {
    display: flex;
    gap: 12px;
    margin-top: 8px;
    margin-bottom: 12px;
  }
  .brush-mode-btn {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
  }
  .brush-mode-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
  }
  .action-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 24px;
  }
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
  }
  .btn-primary {
    background: var(--primary);
    color: white;
  }
  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
  }
  .btn-secondary {
    background: var(--secondary);
    color: white;
  }
  .btn-secondary:hover {
    background: var(--primary-dark);
  }
  .btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
  }
  .btn-outline:hover {
    background: var(--bg-light);
    border-color: var(--primary);
    color: var(--primary);
  }
  .btn-sm {
    padding: 6px 14px;
    font-size: 0.8rem;
  }
  .history-bar {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    justify-content: center;
  }
  .info-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    margin: 32px 0 48px;
    border: 1px solid var(--border-color);
  }
  .info-card h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
  }
  .info-card ul {
    list-style: none;
    padding-left: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
  }
  .info-card li {
    padding-left: 24px;
    position: relative;
    margin-bottom: 12px;
    color: var(--gray);
  }
  .info-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
  }
  @media (max-width: 640px) {
    .container { padding: 0 16px; }
    .method-buttons { justify-content: center; }
    .action-bar { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
  }

  /* Loading overlay */
  .loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    z-index: 10;
    backdrop-filter: blur(4px);
  }
  .loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.3);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
  }
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  .loading-text {
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
  }
  .progress-bar-container {
    width: 80%;
    height: 6px;
    background: rgba(255,255,255,0.3);
    border-radius: 10px;
    margin-top: 16px;
    overflow: hidden;
  }
  .progress-bar-fill {
    width: 0%;
    height: 100%;
    background: var(--primary);
    border-radius: 10px;
    transition: width 0.2s;
  }