:root{font-family:Helvetica Neue,Arial,Hiragino Kaku Gothic ProN,Hiragino Sans,Meiryo,sans-serif;--bg-gradient-start: #8b9ef5;--bg-gradient-end: #9d7ac0;--text-primary: #111;--text-secondary: #333;--card-bg: rgba(255, 255, 255, .4);--card-border: rgba(255, 255, 255, .45);--card-shadow: rgba(31, 38, 135, .15);--button-bg: rgba(102, 126, 234, .8);--button-hover-bg: rgba(102, 126, 234, 1);--input-bg: rgba(255, 255, 255, .4);--input-border: rgba(255, 255, 255, .4);--link-color: #667eea;--link-hover-color: #764ba2;--code-bg: rgba(0, 0, 0, .05);--hover-bg: rgba(255, 255, 255, .55);--accent: #667eea;--accent-soft: rgba(102, 126, 234, .15);--muted: #333;--border: rgba(255, 255, 255, .45)}[data-theme=dark]{--bg-gradient-start: #1a1a2e;--bg-gradient-end: #0f0f23;--text-primary: #e8e8e8;--text-secondary: #e8e8e8;--card-bg: rgba(30, 30, 46, .7);--card-border: rgba(255, 255, 255, .1);--card-shadow: rgba(0, 0, 0, .3);--button-bg: rgba(88, 101, 242, .8);--button-hover-bg: rgba(88, 101, 242, 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