:root{--bg: #0b0b0c;--fg: #f2f2f0;--accent: #c9b37e;--font: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;--muted: color-mix(in srgb, var(--fg) 55%, transparent);--line: color-mix(in srgb, var(--fg) 14%, transparent);--panel: color-mix(in srgb, var(--fg) 5%, var(--bg));--danger: #e5484d;--ok: #46a758;--warn: #f5a524;--radius: 10px}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:var(--bg);color:var(--fg);font-family:var(--font);font-size:15px;line-height:1.7;letter-spacing:.02em;-webkit-font-smoothing:antialiased}a{color:inherit}button,input,select,textarea{font:inherit;color:inherit}h1,h2,h3{font-weight:500;letter-spacing:.06em;line-height:1.4}h1{font-size:clamp(22px,4vw,32px);margin:0 0 24px}h2{font-size:18px;margin:32px 0 12px}small,.muted{color:var(--muted)}.center-screen{min-height:100vh;display:grid;place-items:center;padding:16px;text-align:center}.spinner{width:28px;height:28px;border:2px solid 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