.tool-container {
    max-width: 1200px;
    margin: 0 auto;
    background: #fff;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    height: 85vh;
    min-height: 600px;
    display: flex;
    flex-direction: column;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.actions {
    display: flex;
    gap: 1rem;
}

.btn-primary {
    background-color: #2563eb;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: white;
    color: #374151;
    border: 1px solid #d1d5db;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background-color: #f3f4f6;
}

.view-toggle {
    font-size: 0.9rem;
    color: #4b5563;
}

.editor-split {
    flex: 1;
    display: flex;
    gap: 1.5rem;
    overflow: hidden;
}

.pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
}

.pane-header {
    background: #f8fafc;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: #4b5563;
    border-bottom: 1px solid #e5e7eb;
    font-size: 0.9rem;
}

textarea {
    flex: 1;
    border: none;
    padding: 1rem;
    resize: none;
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    outline: none;
    background: #fff;
}

#htmlPreview {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    background: #fff;
}

/* Basic Markdown Styles for Preview */
.markdown-body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #24292e;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    margin-top: 24px;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.25;
}

.markdown-body h1 { font-size: 2em; border-bottom: 1px solid #eaecef; padding-bottom: 0.3em; }
.markdown-body h2 { font-size: 1.5em; border-bottom: 1px solid #eaecef; padding-bottom: 0.3em; }
.markdown-body p { margin-top: 0; margin-bottom: 16px; }
.markdown-body code {
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    background-color: #f6f8fa;
    border-radius: 6px;
    font-family: monospace;
}
.markdown-body pre {
    padding: 16px;
    overflow: auto;
    font-size: 85%;
    line-height: 1.45;
    background-color: #f6f8fa;
    border-radius: 6px;
}
.markdown-body pre code {
    background-color: transparent;
    padding: 0;
}
.markdown-body blockquote {
    padding: 0 1em;
    color: #6a737d;
    border-left: 0.25em solid #dfe2e5;
    margin: 0 0 16px 0;
}
.markdown-body table {
    border-spacing: 0;
    border-collapse: collapse;
    margin-bottom: 16px;
    width: 100%;
}
.markdown-body table th, .markdown-body table td {
    padding: 6px 13px;
    border: 1px solid #dfe2e5;
}
.markdown-body table tr:nth-child(2n) {
    background-color: #f6f8fa;
}
.markdown-body img {
    max-width: 100%;
    box-sizing: content-box;
}

@media (max-width: 768px) {
    .editor-split {
        flex-direction: column;
    }
    .tool-container {
        height: auto;
    }
    textarea, #htmlPreview {
        height: 300px;
    }
}