.stain-chemistry-container {
    width: 100%;
    padding: 1rem;
  }

  .card-wrapper {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }


  .selectors-section {
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-surface);
  }

  .selectors-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  @media (max-width: 600px) {
    .selectors-grid {
      grid-template-columns: 1fr;
    }
  }

  .selector-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .selector-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.65rem;
    font-weight: 900;
    color: #6366f1;
    text-transform: uppercase;
    letter-spacing: 0.12em;
  }

  .label-icon {
    width: 1rem;
    height: 1rem;
  }

  .select-wrapper {
    position: relative;
  }

  .selector-input {
    width: 100%;
    height: 3.5rem;
    padding: 0 2.5rem 0 1rem;
    background: var(--bg-page);
    border: 2px solid var(--border-color);
    border-radius: 0.875rem;
    appearance: none;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-main);
    cursor: pointer;
    transition: border-color 0.2s;
    outline: none;
  }

  .selector-input:focus {
    border-color: #6366f1;
  }

  .select-chevron {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.25rem;
    height: 1.25rem;
    color: var(--text-muted);
    pointer-events: none;
  }


  .protocol-display {
    padding: 1.5rem 2rem 2rem;
    background: var(--bg-page);
    animation: fade-in 0.4s ease;
  }

  .protocol-display.hidden {
    display: none;
  }

  @keyframes fade-in {
    from {
      opacity: 0;
      transform: translateY(6px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .protocol-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    overflow: hidden;
  }

  .protocol-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-page);
    border-bottom: 1px solid var(--border-color);
  }

  .protocol-icon-wrap {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 0.75rem;
    background: #6366f1;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
  }

  .protocol-icon {
    width: 1.5rem;
    height: 1.5rem;
  }

  .protocol-meta {
    font-size: 0.65rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin: 0 0 0.2rem;
  }

  .protocol-title {
    font-size: 1.35rem;
    font-weight: 900;
    color: var(--text-main);
    margin: 0;
    letter-spacing: -0.02em;
  }

  .protocol-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .protocol-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  @media (max-width: 480px) {
    .protocol-grid {
      grid-template-columns: 1fr;
    }
  }


  .info-card {
    background: var(--bg-page);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.4rem;
    transition: border-color 0.2s;
  }

  .info-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
  }

  .info-card-icon-wrap {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.5rem;
  }

  .agent-icon-wrap {
    background: rgba(99, 102, 241, 0.08);
    color: #6366f1;
  }

  .temp-icon-wrap {
    background: rgba(249, 115, 22, 0.08);
    color: #f97316;
  }

  .info-card-icon {
    width: 1.5rem;
    height: 1.5rem;
  }

  .info-card-meta {
    font-size: 0.6rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--text-muted);
  }

  .info-card-value {
    font-size: 1.15rem;
    font-weight: 900;
    color: var(--text-main);
    margin: 0;
  }

  .info-card-desc {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted);
    margin: 0;
    max-width: 14rem;
    line-height: 1.4;
  }

  .info-card-temp-value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--text-main);
    margin: 0;
    letter-spacing: -0.03em;
  }

  .info-card-temp-label {
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
  }


  .method-card {
    background: #6366f1;
    border-radius: 1rem;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
  }

  .method-card-overlay {
    position: absolute;
    top: 0;
    right: 0;
    padding: 1.5rem;
    opacity: 0.08;
    pointer-events: none;
  }

  .method-overlay-icon {
    width: 5rem;
    height: 5rem;
    color: #fff;
  }

  .method-card-content {
    position: relative;
  }

  .method-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
  }

  .method-icon-wrap {
    width: 2rem;
    height: 2rem;
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
  }

  .method-icon {
    width: 1rem;
    height: 1rem;
  }

  .method-meta {
    font-size: 0.6rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: rgba(255, 255, 255, 0.7);
  }

  .method-text {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.55;
    letter-spacing: -0.01em;
  }


  .warning-card {
    border-radius: 1rem;
    background: rgba(239, 68, 68, 0.06);
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 1.25rem;
    animation: pulse-warning 4s ease infinite;
  }

  .warning-card.hidden {
    display: none;
  }

  @keyframes pulse-warning {
    0%, 100% {
      opacity: 1;
    }
    50% {
      opacity: 0.8;
    }
  }

  .warning-card-inner {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
  }

  .warning-icon {
    width: 1.5rem;
    height: 1.5rem;
    color: #ef4444;
    flex-shrink: 0;
    margin-top: 0.1rem;
  }

  .warning-label {
    font-size: 0.6rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #ef4444;
    margin: 0 0 0.25rem;
  }

  .warning-text {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
    line-height: 1.5;
  }


  .note-card {
    background: var(--bg-page);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.25rem;
  }

  .note-card-inner {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
  }

  .note-badge {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: var(--text-main);
    color: var(--bg-page);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 900;
    flex-shrink: 0;
    margin-top: 0.1rem;
  }

  .note-label {
    font-size: 0.6rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin: 0 0 0.25rem;
  }

  .note-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
  }


  .empty-state {
    padding: 3rem 2rem;
    text-align: center;
    background: var(--bg-page);
  }

  .empty-state.hidden {
    display: none;
  }

  .empty-icon-wrap {
    width: 5rem;
    height: 5rem;
    background: var(--bg-surface);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    border: 1px solid var(--border-color);
  }

  .empty-icon {
    width: 2.5rem;
    height: 2.5rem;
    color: var(--border-color);
  }

  .empty-title {
    font-size: 1.1rem;
    font-weight: 900;
    color: var(--text-main);
    margin: 0 0 0.5rem;
    letter-spacing: -0.02em;
  }

  .empty-desc {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    margin: 0;
    max-width: 18rem;
    margin-inline: auto;
    line-height: 1.5;
  }