.sri-container {
    --bg: #fff;
    --bg-sidebar: #f8fafc;
    --bg-main: #fff;
    --bg-upload: #f8fafc;
    --bg-upload-icon: #fff;
    --bg-canvas: #f1f5f9;
    --bg-btn: #fff;
    --bg-btn-hover: #f8fafc;
    --bg-zoom: #fff;
    --bg-preset-icon: #f1f5f9;
    --bg-preset-hover: #f5f3ff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-sidebar-title: #64748b;
    --text-upload-sub: #64748b;
    --text-zoom: #64748b;
    --text-action: #475569;
    --text-preset-name: #1e293b;
    --text-preset-size: #64748b;

    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg);
    border-radius: 32px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.08);
    display: grid;
    grid-template-columns: 320px 1fr;
    overflow: hidden;
    color: var(--text);
    border: 1px solid var(--border);
    min-height: 700px;
  }

  .sri-sidebar {
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    overflow-y: auto;
  }

  .sri-sidebar-title {
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-sidebar-title);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .sri-preset-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .sri-preset-btn {
    width: 100%;
    padding: 1rem;
    background: var(--bg-btn);
    border: 1px solid var(--border);
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
  }

  .sri-preset-btn:hover {
    border-color: #8b5cf6;
    background: var(--bg-preset-hover);
    transform: translateX(4px);
  }

  .sri-preset-btn.active {
    background: #8b5cf6;
    border-color: #7c3aed;
    color: #fff;
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.2);
  }

  .sri-preset-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-preset-icon);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-sidebar-title);
    flex-shrink: 0;
    transition: all 0.2s ease;
  }

  .sri-preset-btn.active .sri-preset-icon {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
  }

  .sri-preset-info {
    display: flex;
    flex-direction: column;
  }

  .sri-preset-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-preset-name);
  }

  .sri-preset-size {
    font-size: 0.75rem;
    color: var(--text-preset-size);
  }

  .sri-main {
    background: var(--bg-main);
    padding: 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
  }

  .sri-upload-zone {
    flex: 1;
    border: 3px dashed var(--border);
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-upload);
    min-height: 400px;
  }

  .sri-upload-zone:hover,
  .sri-upload-zone.sri-hover {
    border-color: #8b5cf6;
    background: var(--bg-preset-hover);
  }

  .sri-upload-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-upload-icon);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #8b5cf6;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
  }

  .sri-upload-text {
    text-align: center;
  }

  .sri-upload-text h2 {
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
  }

  .sri-upload-text p {
    color: var(--text-upload-sub);
    font-size: 0.95rem;
  }

  .sri-editor-view {
    display: none;
    flex-direction: column;
    gap: 2rem;
    height: 100%;
  }

  .sri-editor-view.active {
    display: flex;
  }

  .sri-canvas-container {
    flex: 1;
    background: var(--bg-canvas);
    border-radius: 24px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    border: 1px solid var(--border);
  }

  .sri-canvas-container canvas {
    max-width: 100%;
    max-height: 100%;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  }

  .sri-editor-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
  }

  .sri-btn-group {
    display: flex;
    gap: 1rem;
  }

  .sri-action-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid var(--border);
    background: var(--bg-btn);
    color: var(--text-action);
    font-size: 0.9rem;
  }

  .sri-action-btn:hover {
    background: var(--bg-btn-hover);
    border-color: var(--border);
  }

  .sri-action-btn.sri-primary {
    background: #8b5cf6;
    border-color: #7c3aed;
    color: #fff;
  }

  .sri-action-btn.sri-primary:hover {
    background: #7c3aed;
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.2);
  }

  .sri-zoom-control {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-zoom);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    color: var(--text-zoom);
  }

  .sri-zoom-control input[type='range'] {
    width: 150px;
    accent-color: #8b5cf6;
  }

  .theme-dark .sri-container {
    --bg: #1e1e21;
    --bg-sidebar: #161618;
    --bg-main: #1e1e21;
    --bg-upload: #161618;
    --bg-upload-icon: #1e1e21;
    --bg-canvas: #111113;
    --bg-btn: #1e1e21;
    --bg-btn-hover: #2d2d30;
    --bg-zoom: #1e1e21;
    --bg-preset-icon: #161618;
    --bg-preset-hover: #232326;
    --border: #2d2d30;
    --text: #f1f5f9;
    --text-sidebar-title: #94a3b8;
    --text-upload-sub: #94a3b8;
    --text-zoom: #94a3b8;
    --text-action: #f1f5f9;
    --text-preset-name: #f1f5f9;
    --text-preset-size: #94a3b8;
  }

  @media (max-width: 900px) {
    .sri-container {
      grid-template-columns: 1fr;
    }

    .sri-sidebar {
      border-right: none;
      border-bottom: 1px solid var(--border);
    }

    .sri-editor-actions {
      flex-direction: column;
      gap: 1rem;
      align-items: stretch;
    }

    .sri-btn-group {
      justify-content: center;
    }
  }