:root {
    --bg: #0f1220;
    --bg-elevated: #171a2b;
    --panel: #1e2238;
    --panel-soft: #252a44;
    --text: #eef2ff;
    --text-muted: #b8c0e6;
    --accent: #6ea8fe;
    --accent-2: #7ef0c7;
    --danger: #ff6b88;
    --warning: #ffcf66;
    --border: #343a5c;
    --shadow: 0 10px 28px rgba(0, 0, 0, 0.32);
    --radius: 12px;
    --radius-sm: 8px;
    --mono:
        ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
        "Liberation Mono", "Courier New", monospace;
    --sans: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: var(--sans);
    background:
        radial-gradient(1000px 500px at 0% -10%, #242b50 0%, var(--bg) 55%),
        var(--bg);
    color: var(--text);
    min-height: 100%;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: none;
}

.playground {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    gap: 16px;
}

.playground__header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.playground__title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.playground__subtitle {
    margin: 2px 0 0;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.playground__header nav,
.playground__header .nav-links,
.playground__header .top-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.playground__header nav a,
.playground__header .nav-links a,
.playground__header .top-nav a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
    background: color-mix(in srgb, var(--accent) 14%, var(--panel-soft));
    color: var(--text);
    font-size: 0.82rem;
    font-weight: 600;
    line-height: 1;
    transition: 120ms ease-in-out;
}

.playground__header nav a:hover,
.playground__header nav a:focus-visible,
.playground__header .nav-links a:hover,
.playground__header .nav-links a:focus-visible,
.playground__header .top-nav a:hover,
.playground__header .top-nav a:focus-visible {
    transform: translateY(-1px);
    border-color: color-mix(in srgb, var(--accent) 70%, var(--border));
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
    text-decoration: none;
    outline: none;
}

.playground__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn {
    border: 1px solid var(--border);
    background: var(--panel-soft);
    color: var(--text);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: 120ms ease-in-out;
}

.btn:hover {
    transform: translateY(-1px);
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.btn:active {
    transform: translateY(0);
}

.btn--primary {
    background: color-mix(in srgb, var(--accent) 20%, var(--panel-soft));
    border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
}

.btn--success {
    background: color-mix(in srgb, var(--accent-2) 16%, var(--panel-soft));
    border-color: color-mix(in srgb, var(--accent-2) 45%, var(--border));
}

.btn--danger {
    background: color-mix(in srgb, var(--danger) 15%, var(--panel-soft));
    border-color: color-mix(in srgb, var(--danger) 40%, var(--border));
}

.layout {
    display: grid;
    grid-template-columns: minmax(320px, 1.2fr) minmax(320px, 1fr);
    gap: 16px;
    min-height: 70vh;
}

@media (max-width: 1080px) {
    .layout {
        grid-template-columns: 1fr;
    }
}

.editor-panel,
.output-panel {
    background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    min-height: 0;
    overflow: hidden;
    display: grid;
    grid-template-rows: auto 1fr;
}

.panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 12px;
    background: color-mix(in srgb, var(--panel) 86%, transparent);
    border-bottom: 1px solid var(--border);
}

.panel__title {
    margin: 0;
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.panel__meta {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.editor-wrap {
    min-height: 360px;
    height: 100%;
}

.editor-wrap textarea {
    width: 100%;
    height: 100%;
    min-height: 360px;
    resize: vertical;
    border: 0;
    outline: none;
    background: var(--panel);
    color: var(--text);
    padding: 14px;
    font-family: var(--mono);
    font-size: 0.86rem;
    line-height: 1.45;
    tab-size: 2;
}

.output-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tab {
    border: 1px solid var(--border);
    background: var(--panel-soft);
    color: var(--text-muted);
    border-radius: 999px;
    padding: 5px 10px;
    font-size: 0.78rem;
    cursor: pointer;
    user-select: none;
    transition: 100ms ease;
}

.tab:hover {
    color: var(--text);
    border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}

.tab.is-active {
    color: var(--text);
    background: color-mix(in srgb, var(--accent) 18%, var(--panel-soft));
    border-color: color-mix(in srgb, var(--accent) 52%, var(--border));
}

.output-body {
    min-height: 360px;
    height: 100%;
    display: grid;
}

.output-pre {
    margin: 0;
    height: 100%;
    overflow: auto;
    padding: 14px;
    background: var(--panel);
    font-family: var(--mono);
    font-size: 0.84rem;
    line-height: 1.45;
    white-space: pre;
}

.output-pre .ok {
    color: var(--accent-2);
}

.output-pre .warn {
    color: var(--warning);
}

.output-pre .err {
    color: var(--danger);
}

.status-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 0.82rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 999px;
    border: 1px solid var(--border);
    padding: 3px 8px;
    background: var(--panel-soft);
    line-height: 1.1;
}

.badge--ok {
    border-color: color-mix(in srgb, var(--accent-2) 50%, var(--border));
    color: var(--accent-2);
}

.badge--error {
    border-color: color-mix(in srgb, var(--danger) 50%, var(--border));
    color: var(--danger);
}

.footer-note {
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 0.8rem;
}