:root{--ground: #e9ebe4;--raised: #f3f4ee;--ink: #16211d;--ink-soft: #5c6a63;--pine: #24503f;--pine-soft: #3d6d59;--ochre: #b07d2b;--rule: #c6cbc1;--wrong: #9b3a2f;--step: 8px;--mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;--sans: "Pretendard Variable", Pretendard, -apple-system, system-ui, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}button:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--ochre);outline-offset:2px}.shell{max-width:780px;margin:0 auto;padding:24px 20px 96px}.masthead{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding-bottom:14px;margin-bottom:28px;border-bottom:1.5px solid var(--ink)}.masthead h1{margin:0;font-size:19px;font-weight:800;letter-spacing:-.03em}.masthead 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