:root {
    color-scheme: dark;
    --background: #050c14;
    --panel: #0a1723;
    --panel-deep: #030b12;
    --line: #26445b;
    --line-strong: #3a6886;
    --text: #eef8ff;
    --muted: #9eb7c9;
    --cyan: #6de4ff;
    --green: #7cf2a6;
    --amber: #ffd166;
    --coral: #ff8d74;
    --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: var(--mono);
}

button,
textarea {
    font: inherit;
}

:focus-visible {
    outline: 3px solid var(--amber);
    outline-offset: 2px;
}

.playground {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(16rem, 0.8fr);
    min-height: 41rem;
}

.editor-panel,
.console-panel {
    display: grid;
    min-width: 0;
}

.editor-panel {
    grid-template-rows: auto 1fr auto;
}

.console-panel {
    grid-template-rows: auto auto 1fr;
    border-left: 1px solid var(--line);
    background: var(--panel-deep);
}

header {
    display: flex;
    min-height: 3.7rem;
    align-items: center;
    justify-content: space-between;
    gap: 0.7rem;
    padding: 0.65rem 0.8rem;
    border-bottom: 1px solid var(--line);
    background: rgb(255 255 255 / 0.025);
}

header > div {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

header strong {
    color: var(--muted);
    font-size: 0.74rem;
}

.dot {
    display: inline-block;
    width: 0.56rem;
    height: 0.56rem;
    border-radius: 50%;
    box-shadow: 0 0 12px currentColor;
}

.dot--cyan {
    background: var(--cyan);
    color: var(--cyan);
}

.dot--green {
    background: var(--green);
    color: var(--green);
}

.controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.4rem;
}

button {
    min-height: 2.1rem;
    padding: 0.3rem 0.62rem;
    border: 1px solid var(--line);
    border-radius: 0.4rem;
    background: var(--panel);
    color: var(--muted);
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 800;
}

button:hover {
    border-color: var(--line-strong);
    color: var(--text);
}

button.run {
    border-color: rgb(109 228 255 / 0.55);
    color: var(--cyan);
}

button:disabled {
    cursor: wait;
    opacity: 0.58;
}

kbd {
    color: var(--muted);
    font: inherit;
}

#source {
    width: 100%;
    min-height: 31rem;
    resize: none;
    padding: 1.2rem;
    border: 0;
    background: var(--panel);
    color: var(--text);
    font-size: 0.82rem;
    line-height: 1.7;
    tab-size: 4;
}

#editor-help,
.run-status {
    margin: 0;
    color: var(--muted);
    font-size: 0.64rem;
}

#editor-help {
    padding: 0.58rem 0.8rem;
    border-top: 1px solid var(--line);
}

.run-status {
    padding: 0.55rem 0.8rem;
    border-bottom: 1px solid var(--line);
    color: var(--cyan);
    font-weight: 800;
    text-transform: uppercase;
}

#output {
    overflow: auto;
    max-height: 36rem;
    margin: 0;
    padding: 0.8rem;
    list-style: none;
}

#output li {
    margin: 0 0 0.58rem;
    padding: 0.58rem 0.68rem;
    overflow-wrap: anywhere;
    border-left: 2px solid var(--line);
    background: rgb(255 255 255 / 0.025);
    color: #c2d4e1;
    font-size: 0.73rem;
    line-height: 1.5;
    white-space: pre-wrap;
}

#output li::before {
    display: block;
    margin-bottom: 0.18rem;
    color: var(--muted);
    content: attr(data-level);
    font-size: 0.58rem;
    text-transform: uppercase;
}

#output li.log {
    border-color: var(--cyan);
}

#output li.info {
    border-color: #c4b5fd;
}

#output li.warn {
    border-color: var(--amber);
    color: var(--amber);
}

#output li.error {
    border-color: var(--coral);
    color: #ffb5a4;
}

#output li.success {
    border-color: var(--green);
    color: var(--green);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    border: 0;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
}

@media (max-width: 46rem) {
    .playground {
        grid-template-columns: minmax(0, 1fr);
    }

    .console-panel {
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    #source {
        min-height: 22rem;
    }

    #output {
        min-height: 13rem;
        max-height: 20rem;
    }

    header {
        align-items: flex-start;
    }
}