:root{color-scheme:light;--color-green-900: #0f5b31;--color-green-700: #1e7a45;--color-green-100: #eaf5ed;--color-orange-600: #f07800;--color-orange-100: #fff4e8;--color-yellow-600: #d9a900;--color-yellow-100: #fff9e8;--color-navy-800: #164e73;--color-navy-100: #f1f7fa;--color-page-bg: #ffffff;--color-section-bg: #fafbf9;--color-card-bg: #ffffff;--color-border: #d9e2da;--color-border-strong: #b9ccbd;--color-heading: #171c19;--color-text: #333b36;--color-muted: #6b746e;--container-max: 1200px;--card-shadow: 0 1px 3px rgba(0, 0, 0, .025), 0 5px 16px rgba(22, 75, 40, .035)}*{box-sizing:border-box}html,body{font-family:Noto Sans JP,Hiragino Kaku Gothic ProN,Hiragino Sans,Yu Gothic,Meiryo,sans-serif}body{margin:0;background:var(--color-page-bg);color:var(--color-text);font-size:.9375rem;line-height:1.85;letter-spacing:.01em}.container{width:min(calc(100% - 48px),var(--container-max));margin-inline:auto}main.reading{max-width:720px;margin:2rem auto 0;padding:0 1rem 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