/* Playground Styles */
.playground-container {
    min-height: calc(100vh - 70px);
    background: var(--bg-darker);
}

.playground-header {
    text-align: center;
    padding: 3rem 2rem 2rem;
    background: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.1), transparent 70%);
}

.playground-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.playground-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.playground-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 0;
    max-width: 1600px;
    margin: 0 auto;
}

.examples-sidebar {
    background: var(--bg-dark);
    border-right: 1px solid var(--border);
    padding: 1.5rem 0;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    position: sticky;
    top: 70px;
}

/* Category counter badge */
.examples-sidebar h3 {
    position: relative;
}

.examples-sidebar h3::after {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    margin-left: 0.5rem;
    vertical-align: middle;
}

.examples-sidebar::-webkit-scrollbar {
    width: 8px;
}

.examples-sidebar::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

.examples-sidebar::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.examples-sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.examples-sidebar h3 {
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0 1.5rem;
    margin-bottom: 0.75rem;
    margin-top: 0;
    opacity: 0.8;
}

.examples-sidebar h3:first-child {
    margin-top: 0;
}

/* Fun Math section styling */
.examples-sidebar h3:has(+ .example-list [data-example^="fun_"]),
.examples-sidebar h3:contains("Fun Math") {
    background: linear-gradient(90deg, #f38ba8, #fab387);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 1;
}

.example-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.example-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 0.9rem;
    width: 100%;
}

.example-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.example-btn.active {
    background: var(--bg-card);
    color: var(--primary);
    border-left-color: var(--primary);
}

.example-icon {
    font-size: 1.25rem;
    min-width: 1.25rem;
    text-align: center;
}

.playground-main {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.code-panel,
.output-panel,
.explanation-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    color: var(--text-primary);
}

.output-status {
    font-size: 0.875rem;
    color: var(--success);
    font-weight: normal;
}

.btn-run {
    padding: 0.375rem 1rem;
    background: var(--success);
    color: white;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s;
    margin-right: 0.5rem;
}

.btn-run:hover {
    background: #059669;
}

.btn-copy {
    padding: 0.375rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-copy:hover {
    background: var(--primary-dark);
}

.code-panel pre,
.output-panel pre {
    margin: 0;
    padding: 1.5rem;
    overflow-x: auto;
}

.code-panel code {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    outline: none;
}

#output {
    min-height: 100px;
    color: var(--success);
}

.explanation-content {
    padding: 1.5rem;
}

.explanation-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.explanation-content ul {
    color: var(--text-secondary);
    line-height: 1.7;
    padding-left: 1.5rem;
}

.explanation-content li {
    margin-bottom: 0.5rem;
}

.explanation-content code {
    background: var(--bg-darker);
    padding: 0.2em 0.4em;
    border-radius: 0.25rem;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--primary);
}

.playground-info {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 2rem;
}

.info-card h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.info-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.info-card ul {
    list-style: none;
    padding-left: 0;
}

.info-card li {
    margin-bottom: 0.5rem;
}

.info-card a {
    color: var(--primary);
    text-decoration: none;
}

.info-card a:hover {
    text-decoration: underline;
}

.info-card pre {
    background: var(--bg-darker);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1rem;
    overflow-x: auto;
    margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .playground-layout {
        grid-template-columns: 1fr;
    }
    
    .examples-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    
    .playground-main {
        padding: 1rem;
    }
    
    .playground-info {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
}