:root{--brand-page:radial-gradient(ellipse at 50% 0%, #382643 0%, #171426 30%, #0d0e1b 72%);--brand-panel:linear-gradient(140deg, #292030, #151321 75%);--brand-surface:#211d2e;--brand-ink:#efe4d5;--brand-muted:#c1b3c5;--brand-gold:#d8b984;--brand-line:#d8b98445;--brand-paper:linear-gradient(130deg, #f2e7d5, #e8dac4);--brand-paper-ink:#30233f;--brand-paper-muted:#66566d;--brand-paper-line:#9d784a45;--brand-button:linear-gradient(135deg, #e9d7b4, #c1a170);--brand-serif:var(--font-noto-serif-jp,"Noto Serif JP"), "Noto Serif JP", "Hiragino Mincho ProN", serif;--brand-sans:var(--font-noto-sans-jp,"Noto Sans JP"), "Noto Sans JP", system-ui, sans-serif}.osg-brand-fonts{--brand-serif:var(--font-noto-serif-jp), "Noto Serif JP", "Hiragino Mincho ProN", serif;--brand-sans:var(--font-noto-sans-jp), "Noto Sans JP", system-ui, sans-serif}