.katex-display {
    margin: 1em 0;
    text-align: center;
    overflow-x: auto;
}

.katex-error {
    color: #d9534f;
    background-color: #f2dede;
    padding: 2px 4px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 0.9em;
}

.katex-fallback {
    font-family: monospace;
    color: #333;
}

div.mermaid {
    margin: 1em 0;
    text-align: center;
    overflow-x: auto;
}

div.mermaid-error {
    color: #d9534f;
    background-color: #f2dede;
    padding: 8px 12px;
    border-radius: 3px;
    font-family: monospace;
    white-space: pre-wrap;
    font-size: 0.9em;
}

div.mermaid-fallback {
    font-family: monospace;
    white-space: pre-wrap;
}

.mermaid-zoom-wrapper {
    margin: 1em 0;
}

.mermaid-zoom-toolbar {
    display: flex;
    justify-content: flex-end;
    gap: 4px;
    padding: 4px 8px;
    background: #f1f3f5;
    border-bottom: 1px solid #e9ecef;
    border-radius: 4px 4px 0 0;
}

.mermaid-zoom-btn {
    width: 28px;
    height: 28px;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    background: #fff;
    cursor: pointer;
    font-size: 16px;
    line-height: 26px;
    text-align: center;
    color: #495057;
    padding: 0;
    user-select: none;
}

.mermaid-zoom-btn:hover {
    background: #e9ecef;
    border-color: #adb5bd;
}

.mermaid-svg-container {
    overflow: auto;
    max-height: 600px;
    position: relative;
    padding: 8px;
}

.markdown-body img {
    cursor: zoom-in;
    transition: opacity 0.15s;
}

.markdown-body img:hover {
    opacity: 0.85;
}

.mermaid-context-menu {
    position: fixed;
    z-index: 99999;
    background: #fff;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 4px 0;
    min-width: 140px;
    font-size: 14px;
}

.mermaid-menu-item {
    padding: 8px 16px;
    cursor: pointer;
    color: #333;
    white-space: nowrap;
}

.mermaid-menu-item:hover {
    background: #f1f3f5;
    color: #1a73e8;
}

@media (max-width: 768px) {
    .katex-display, div.mermaid {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .mermaid-svg-container {
        max-height: 400px;
    }
}