:root{--color-brand:#191919;--color-surface:#fff;--color-text:#1a1a1a;--color-text-muted:#5a5a5a;--color-border:#d9d9d9;--color-error:#c0392b;--color-fat-burning:#e8752a;--color-hip-core:#2f7dc4;--color-kick-boxing:#d8352f;--color-breakdown-1:#b0b0b0;--color-breakdown-2:#8c8c8c;--color-breakdown-3:#686868;--color-breakdown-4:#454545;--color-breakdown-5:#232323;--font-size-body:16px;--font-size-small:14px;--font-size-title:20px;--space-1:4px;--space-2:8px;--space-3:16px;--space-4:24px;--radius:8px}*{box-sizing:border-box}body{background:var(--color-surface);color:var(--color-text);font-family:system-ui,-apple-system,Hiragino Kaku Gothic ProN,Noto Sans JP,sans-serif;font-size:var(--font-size-body);margin:0;line-height:1.6}main{padding:var(--space-3);max-width:480px;margin:0 auto}button{font-size:var(--font-size-body);padding:var(--space-2) var(--space-3);border-radius:var(--radius);background:var(--color-brand);color:var(--color-surface);cursor:pointer;border:none}button:disabled{opacity:.5;cursor:default}