:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f3ede2;--bg-deep:#e9dfcf;--card:#fffdf8;--cream:#fffaf0;--ink:#101a2e;--ink-soft:#33415a;--muted:#5f6a7d;--line:#e3d9c7;--line-strong:#c9bda6;--navy:#0e192b;--navy-2:#15233b;--navy-3:#1c2d4a;--mint:#57d3a5;--mint-strong:#2fbf8f;--mint-deep:#0f8f68;--orange:#ffb648;--orange-deep:#c87b14;--coral:#ff7d5c;--periwinkle:#7b8cff;--danger:#d94b4b;--radius-xl:26px;--radius-lg:18px;--radius-md:12px;--shadow-panel:0 18px 45px #101a2e17, 0 2px 0 #fffc inset;--shadow-dock:0 20px 40px #080f1c47;--font:"Pretendard Variable", Pretendard, "Apple SD Gothic Neo", "Malgun Gothic", system-ui, -apple-system, sans-serif;--mono:"SFMono-Regular", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace}*,:before,:after{box-sizing:border-box}html,body{height:100%}body{font-family:var(--font);color:var(--ink);background:radial-gradient(circle at 12% -10%, #57d3a533, transparent 38%), radial-gradient(circle at 100% 0%, #ffb6482e, 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0 2px;font-size:36px;line-height:1}.success-card__title{letter-spacing:-.04em;margin:4px 0 8px;font-size:22px;font-weight:850}.success-card__copy{color:var(--ink-soft);margin:0;font-size:12px;line-height:1.65}.success-card__blocks{color:var(--muted);background:#101a2e0f;border-radius:9px;margin:12px 0 16px;padding:7px 10px;font-size:11px;font-weight:750}.success-card__actions{justify-content:center;gap:8px;display:flex}.challenge-brief{border-top:1px solid #ffffff12;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;display:flex}.challenge-brief__text{min-width:0}.stage-chip{color:#a8f2d8;letter-spacing:.04em;background:#57d3a529;border-radius:99px;align-items:center;margin-bottom:4px;padding:2px 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13px;display:flex}.status-strip{align-items:center;gap:6px 18px;min-width:0;font-size:11px;display:flex}.status-strip__item{white-space:nowrap;align-items:baseline;gap:6px;min-width:0;display:inline-flex}.status-strip__item--wide{flex:1;min-width:120px;overflow:hidden}.status-strip__item--wide strong{text-overflow:ellipsis;overflow:hidden}.status-strip__label{color:#fffaf07a;letter-spacing:.11em;text-transform:uppercase;font-size:9px;font-weight:800}.status-strip strong{font-variant-numeric:tabular-nums;font-weight:750}.status-strip strong[data-state=success]{color:var(--mint)}.status-strip strong[data-state=error]{color:#ff9f89}.status-strip strong[data-state=incomplete]{color:var(--orange)}.status-strip strong[data-state=paused]{color:#c9d7ef}.status-strip strong[data-state=running]{color:var(--orange)}.transcript{margin-left:auto;font-size:10.5px;position:relative}.transcript summary{color:#fffaf0a6;cursor:pointer;white-space:nowrap;border:1px solid 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9px;font-size:11px;font-weight:700}.speed-control select option{color:var(--ink);background:var(--cream)}.sheet{background:radial-gradient(circle at 100% 0%, #ffb64821, transparent 34%), var(--cream);width:min(940px,100vw - 32px);max-height:min(88dvh,940px);color:var(--ink);border:1px solid #101a2e1a;border-radius:26px;padding:0;overflow:auto;box-shadow:0 40px 90px #060c186b}.sheet::backdrop{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#050a1494}.sheet__head{z-index:4;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffaf0f0;justify-content:space-between;align-items:flex-start;gap:16px;padding:20px 22px 16px;display:flex;position:sticky;top:0}.sheet__head h2{letter-spacing:-.04em;margin:3px 0 0;font-size:22px;font-weight:850}.sheet--teacher,.sheet--settings{width:min(900px,100vw - 32px)}.sheet--settings{width:min(560px,100vw - 32px)}#teacher-content,#settings-content{padding:18px 22px 24px}.challenge-stages{flex-direction:column;gap:16px;padding:18px 22px 24px;display:flex}.stage-section{--stage-accent:var(--mint-strong);--stage-soft:#57d3a51a;flex-direction:column;gap:9px;display:flex}.stage-section[data-stage=repeat]{--stage-accent:#e86645;--stage-soft:#ff7d5c1a}.stage-section[data-stage=choice]{--stage-accent:#5e6fdd;--stage-soft:#7b8cff1a}.stage-section[data-stage=choice-loop]{--stage-accent:#c87b14;--stage-soft:#ffb64824}.stage-section[data-stage=mixed]{--stage-accent:var(--navy);--stage-soft:#101a2e0f}.stage-heading{border:1px solid var(--line);background:var(--stage-soft);border-radius:14px;align-items:center;gap:11px;padding:10px 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