.tool-container {
      max-width: 800px;
      margin: 40px auto;
      padding: 20px;
      background: var(--card-bg);
      box-shadow: var(--shadow);
      border-radius: 12px;
      border: 1px solid var(--border-color, transparent);
    }
.version {
      text-align: center;
      opacity: 0.6;
      margin-bottom: 24px;
    }
.input-group {
      margin-bottom: 20px;
      border-bottom: 1px dashed var(--border-color);
      padding-bottom: 10px;
    }
.input-group .section-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 8px;
      gap: 12px;
    }
.input-group .section-header input {
      flex: 1;
      font-size: 16px;
      font-weight: bold;
      border: none;
      border-bottom: 2px solid var(--border-color);
      padding: 8px;
      background: transparent;
      color: var(--text-color, inherit);
    }
.input-group .section-header button {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      color: var(--primary-color);
      cursor: pointer;
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 14px;
    }
.input-group textarea {
      line-height: 1.4;
      width: 100%;
      min-height: 120px;
      padding: 12px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      resize: vertical;
      background: var(--card-bg);
      color: var(--text-color, inherit);
    }
.buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }
.buttons button {
      padding: 12px 20px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      font-size: 14px;
      font-weight: 600;
      color: var(--accent-ink);
    }
.buttons button.save {
      background: var(--ok);
    }
.buttons button.clear {
      background: var(--muted);
    }
.buttons button.download {
      background: var(--primary-color);
    }
.buttons button.add {
      background: var(--accent);
    }