:root {
    --playground-background: #f8f9fa;
    --playground-border: #dee2e6;
    --playground-text: #212529;
    --playground-button-hover: #e9ecef;
    --playground-output-background: #fff;
    --playground-table-border: #dee2e6;
    --playground-table-header: #f8f9fa;
    --playground-success: #28a745;
    --playground-error: #dc3545;
    --code-block-background: #f8f9fa;
    --code-block-border: #dee2e6;
    --code-block-header-background: #e9ecef;
    --code-block-header-text: #212529;
    --anchor-color: #007bff;
}

.secondary-theme {
    --playground-background: #1e1e1e;
    --playground-border: #333;
    --playground-text: #d4d4d4;
    --playground-button-hover: #333;
    --playground-output-background: #252526;
    --playground-table-border: #444;
    --playground-table-header: #333;
    --code-block-background: #1e1e1e;
    --code-block-border: #333;
    --code-block-header-background: #252526;
    --code-block-header-text: #d4d4d4;
    --anchor-color: #00aaff;
}

.container {
    display: flex;
    justify-content: center;
}

.toc-container {
    width: 250px;
    margin-right: 24px;
}

#toc {
    position: sticky;
    top: 24px;
    background-color: var(--toc-background);
    border: 1px solid var(--toc-border);
    border-radius: 8px;
    padding: 16px;
}

#toc h2 {
    margin-top: 0;
    font-size: 18px;
}

#toc ul {
    padding-left: 20px;
}

#toc li {
    margin-bottom: 8px;
}

#toc a {
    color: var(--toc-link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

#toc a:hover {
    color: var(--toc-link-hover-color);
}

.toc-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1000;
    background-color: var(--toc-toggle-background);
    border: 1px solid var(--toc-toggle-border);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
}

.toc-toggle svg {
    width: 24px;
    height: 24px;
    stroke: var(--toc-toggle-color);
}

@media (max-width: 768px) {
    .toc-container {
        position: fixed;
        top: 0;
        left: 0;
        height: 100%;
        background-color: var(--toc-background);
        border-right: 1px solid var(--toc-border);
        padding: 16px;
        z-index: 999;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
    }

    .toc-container.open {
        transform: translateX(0);
    }

    .toc-toggle {
        display: block;
    }

    .container {
        margin-left: 0; /* Remove margin when TOC is an overlay */
    }
}

h1, h2, h3, h4, h5, h6 {
    position: relative;
}

.anchor-link {
    position: absolute;
    left: -24px;
    opacity: 0;
    transition: opacity 0.2s ease;
    color: var(--anchor-color);
}

h1:hover .anchor-link,
h2:hover .anchor-link,
h3:hover .anchor-link,
h4:hover .anchor-link,
h5:hover .anchor-link,
h6:hover .anchor-link {
    opacity: 1;
}

.sql-playground {
    position: relative;
    border: 1px solid var(--playground-border);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 24px;
    background-color: var(--playground-background);
    color: var(--playground-text);
}

.sql-playground .controls {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    align-items: center;
}

.sql-playground .run-button,
.sql-playground .edit-button,
.sql-playground .reset-button,
.sql-playground .cancel-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.sql-playground .run-button:hover,
.sql-playground .edit-button:hover,
.sql-playground .reset-button:hover,
.sql-playground .cancel-button:hover {
    background-color: var(--playground-button-hover);
}

.sql-playground .run-button svg,
.sql-playground .edit-button svg,
.sql-playground .reset-button svg,
.sql-playground .cancel-button svg {
    width: 20px;
    height: 20px;
    stroke: var(--playground-text);
}

.sql-playground .CodeMirror {
    border: 1px solid var(--playground-border);
    border-radius: 4px;
    font-size: 16px;
    height: auto;
}

.sql-playground .CodeMirror-scroll {
    min-height: 50px;
}

.sql-playground .output {
    margin-top: 16px;
    padding: 12px;
    border: 1px solid var(--playground-border);
    border-radius: 4px;
    min-height: 50px;
    background-color: var(--playground-output-background);
    display: none;
    overflow-x: auto;
}

.sql-playground .status {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sql-playground .spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--playground-text);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.sql-playground .success {
    color: var(--playground-success);
    font-size: 20px;
}

.sql-playground .error {
    color: var(--playground-error);
    font-size: 20px;
}

.sql-playground table {
    width: 100%;
    border-collapse: collapse;
}

.sql-playground th,
.sql-playground td {
    border: 1px solid var(--playground-table-border);
    padding: 10px;
    text-align: left;
    white-space: nowrap;
}

.sql-playground th {
    background-color: var(--playground-table-header);
}

.code-block {
    position: relative;
    border: 1px solid var(--code-block-border);
    border-radius: 8px;
    margin-bottom: 24px;
    background-color: var(--code-block-background);
}

.code-block .code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background-color: var(--code-block-header-background);
    border-bottom: 1px solid var(--code-block-border);
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.code-block .language-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--code-block-header-text);
}

.code-block .copy-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.code-block .copy-button:hover {
    background-color: var(--playground-button-hover);
}

.code-block .copy-button svg {
    width: 18px;
    height: 18px;
    stroke: var(--code-block-header-text);
}

.code-block pre {
    margin: 0;
    padding: 16px;
    border: none;
    background-color: transparent;
    overflow-x: auto;
}

.blog-post {
    margin: 0 auto;
    max-width: 800px;
    flex-grow: 1;
}