.tool-app {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --border: #334155;
    --text: #e2e8f0;
    --text-muted: #cbd5e1;
    --glass: rgba(255, 255, 255, 0.03);
    --radius: 16px;
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  }

  .tool-app {
    background: linear-gradient(135deg, var(--dark) 0%, #1a1a2e 100%);
    border-radius: var(--radius);
    padding: 2rem;
    margin: 2rem auto;
    max-width: 1000px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
  }

  .tool-header {
    text-align: center;
    margin-bottom: 2rem;
  }

  .tool-header h1 {
    color: #fff;
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .tool-header p {
    color: var(--text-muted);
    font-size: 1rem;
  }

  .info-box {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: monospace;
  }

  .info-box strong {
    color: #c7d2fe;
  }

  .control-panel {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
  }

  .control-group {
    margin-bottom: 1rem;
  }

  .control-group label {
    color: var(--text);
    font-size: 0.875rem;
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
  }

  .control-group textarea,
  .control-group input[type="file"],
  .control-group input[type="datetime-local"] {
    width: 100%;
    background: var(--dark);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.75rem;
    border-radius: 10px;
    font-size: 0.85rem;
  }

  .control-group textarea {
    min-height: 120px;
    resize: vertical;
    font-family: monospace;
  }

  .control-group input[type="file"] {
    border-style: dashed;
    cursor: pointer;
  }

  .control-group input[type="datetime-local"] {
    color-scheme: dark;
  }

  .date-control-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: center;
  }

  .btn-compact {
    min-height: 42px;
    white-space: nowrap;
  }

  .confirmation-group {
    padding: 0.875rem;
    border: 1px solid #64748b;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.08);
  }

  .control-group .confirmation-label {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    margin-bottom: 0;
    cursor: pointer;
    line-height: 1.5;
  }

  .confirmation-label input[type="checkbox"] {
    flex: 0 0 auto;
    width: 1.2rem;
    height: 1.2rem;
    margin-top: 0.1rem;
    accent-color: var(--primary);
  }

  .control-group textarea:focus-visible,
  .control-group input:focus-visible,
  .btn:focus-visible {
    outline: 3px solid #a5b4fc;
    outline-offset: 2px;
  }

  .control-group .hint {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
  }

  .action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
  }

  .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

  .btn-primary {
    background: linear-gradient(135deg, #4338ca, #3730a3);
    color: #fff;
  }

  .btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
    color: #fff;
  }

  .btn-warning {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #111827;
  }

  .btn-danger {
    background: linear-gradient(135deg, #b91c1c, #991b1b);
    color: #fff;
  }

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

  .progress-container {
    margin-bottom: 1.5rem;
  }

  .progress-bar-wrapper {
    background: var(--dark);
    border-radius: 10px;
    height: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
  }

  .progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--success));
    width: 0%;
    transition: width 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: #fff;
    font-weight: 600;
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.5rem;
    margin-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
  }

  .stats-grid div {
    display: flex;
    gap: 0.5rem;
  }

  .stats-grid strong {
    color: var(--text);
  }

  .log-box {
    background: #111827;
    color: #d1e4ff;
    padding: 1rem;
    border-radius: 12px;
    font-size: 0.7rem;
    max-height: 200px;
    overflow: auto;
    font-family: monospace;
    white-space: pre-wrap;
  }

  .faq-section {
    padding: 3rem 0;
    background: #f8fafc;
  }

  .faq-list {
    max-width: 800px;
    margin: 0 auto;
  }

  .faq-item {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
  }

  .faq-question-header {
    padding: 1.25rem;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    color: #1e293b;
  }

  .faq-answer {
    padding: 0 1.25rem 1.25rem;
    color: #64748b;
    line-height: 1.7;
  }

  @media (max-width: 560px) {
    .tool-app {
      padding: 1.25rem;
    }

    .date-control-row {
      grid-template-columns: 1fr;
    }

    .btn-compact {
      justify-content: center;
    }
  }