.tool-content {
      max-width: 800px;
      margin: 0 auto;
      padding: var(--space-lg);
    }
button {
      padding: 12px 24px;
      font-size: 1rem;
      font-weight: bold;
      color: var(--accent-ink);
      background-color: var(--primary-color);
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: filter 0.2s;
    }
button:hover {
      filter: brightness(1.1);
    }
textarea {
      width: 100%;
      box-sizing: border-box;
      margin: 10px 0;
      padding: 12px;
      font-size: 1rem;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      resize: vertical;
      color: var(--text-color);
      background-color: var(--card-bg);
    }
textarea[readonly] {
      opacity: 0.8;
    }
.info-text {
      color: var(--text-color);
      opacity: 0.7;
      font-size: 0.9rem;
      margin: var(--space-sm) 0;
    }
.button-group {
      display: flex;
      gap: var(--space-sm);
      flex-wrap: wrap;
      margin: var(--space-md) 0;
    }
.img-modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.85);
      z-index: 3000;
      display: none;
      justify-content: center;
      align-items: center;
      padding: 20px;
      opacity: 0;
      transition: opacity 0.3s;
    }
.img-modal-overlay.show {
      display: flex;
      opacity: 1;
    }
.modal-content-img {
      position: relative;
      max-width: 100%;
      max-height: 90vh;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
      border-radius: 4px;
    }
.img-close-btn {
      position: absolute;
      top: -40px;
      right: 0;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 28px;
      cursor: pointer;
      line-height: 1;
      padding: 4px;
    }
.btn-text {
      background: transparent;
      border: none;
      padding: 0;
      color: var(--link-color);
      text-decoration: underline;
      cursor: pointer;
      font-size: inherit;
    }
.btn-text:hover {
      text-decoration: none;
    }
.sample-info {
      margin-top: 6px;
      font-size: 0.95em;
      opacity: 0.9;
      line-height: 1.6;
    }