:root{--accent: #c2410c;--accent-hover: #9a3412;--accent-light: #fed7aa;--bg: #ffffff;--bg-soft: #f5f5f4;--bg-card: #ffffff;--bg-dark: #1c1917;--text: #1c1917;--text-muted: #44403c;--text-on-dark: #f5f5f4;--border: #d6d3d1;--focus: #2563eb;--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 4px 12px rgba(0, 0, 0, .06);--shadow-hover: 0 4px 12px rgba(0, 0, 0, .15), 0 8px 24px rgba(0, 0, 0, .1);--radius: 12px;--radius-sm: 8px;--max-width: 780px;--header-height: 72px;--font-base: 18px;--font-sm: 16px;--font-xs: 14px;--line-height: 1.9;--letter-spacing: .02em}@media(prefers-color-scheme:dark){:root{--bg: #1c1917;--bg-soft: #292524;--bg-card: #292524;--text: #f5f5f4;--text-muted: #a8a29e;--border: #44403c;--accent: #fb923c;--accent-hover: #fdba74;--shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 4px 12px rgba(0, 0, 0, .2);--shadow-hover: 0 4px 12px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3)}}@media(prefers-contrast:more){:root{--text: #000000;--text-muted: #000000;--bg: #ffffff;--bg-soft: #ffffff;--border: #000000;--accent: #9a3412}}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:BIZ UDPGothic,Hiragino Kaku Gothic ProN,Hiragino Sans,Noto Sans JP,Meiryo,sans-serif;background:var(--bg-soft);color:var(--text);font-size:var(--font-base);line-height:var(--line-height);letter-spacing:var(--letter-spacing);-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}main{width:var(--max-width);max-width:calc(100% - 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