:root{color-scheme:dark;--bg: #05070c;--bg-2: #0a0e16;--text: #e9eef6;--text-2: #c7d0de;--text-dim: #9aa5b8;--text-faint: #687387;--glass-top: rgba(255, 255, 255, .068);--glass-bottom: rgba(255, 255, 255, .026);--glass-border: rgba(255, 255, 255, .09);--glass-border-2: rgba(255, 255, 255, .17);--glass-solid: rgba(12, 16, 25, .72);--silver: linear-gradient(180deg, #ffffff 0%, #eef2f8 38%, #b9c6d8 100%);--silver-btn: linear-gradient(180deg, #ffffff 0%, #dde5f0 55%, #b8c5d7 100%);--accent: #a9c1ff;--accent-soft: rgba(169, 193, 255, .14);--ok: #7ee2b8;--ok-soft: rgba(126, 226, 184, .12);--bad: #ff8fa3;--bad-soft: rgba(255, 143, 163, .12);--warn: #ffd28a;--warn-soft: rgba(255, 210, 138, .1);--ring-track: rgba(255, 255, 255, .08);--bar-empty: rgba(255, 255, 255, .06);--code-bg: rgba(4, 6, 11, .62);--code-text: #dfe6f1;--sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--radius: 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var(--glass-border);white-space:nowrap}.chip-ok{color:var(--ok);background:var(--ok-soft);border-color:#7ee2b840}.chip-next{color:#0a0e16;background:var(--silver-btn);border-color:transparent}.chip-link:hover{border-color:var(--glass-border-2);color:#fff}.level-beginner{color:#9ef0cf;border-color:#9ef0cf40;background:#9ef0cf14}.level-intermediate{color:#a8d4ff;border-color:#a8d4ff40;background:#a8d4ff14}.level-advanced{color:#c9b8ff;border-color:#c9b8ff40;background:#c9b8ff14}.level-expert{color:#ffd6a0;border-color:#ffd6a040;background:#ffd6a014}.bar{height:6px;border-radius:99px;background:var(--bar-empty);overflow:hidden}.bar-thin{height:4px}.bar-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,#8ea7c9,#fff);transition:width .5s ease}.tabs{display:flex;flex-wrap:wrap;gap:6px;margin:22px 0 16px}.tab{padding:8px 14px;border-radius:999px;border:1px solid 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var(--glass-border)}.runner-label{font-size:.74rem;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--text-dim)}.runner-hint{font-size:.74rem;color:var(--text-faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.runner-actions{margin-left:auto;display:flex;gap:6px;flex:none}.runner-code{display:block;width:100%;margin:0;padding:16px 18px;border:0;outline:none;resize:vertical;background:transparent;color:var(--code-text);font-family:var(--mono);font-size:.88rem;line-height:1.6;-moz-tab-size:4;tab-size:4;white-space:pre;overflow-x:auto;caret-color:#fff}.runner-out{padding:14px 18px 16px;border-top:1px solid 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