:root{color-scheme:light;--color-background:#f4f6fb;--color-surface:#fff;--color-surface-muted:#f8fafc;--color-surface-accent:#eef2ff;--color-border:#e2e8f0;--color-border-strong:#cbd5f5;--color-text:#1f2937;--color-text-muted:#6b7280;--color-text-accent:#4338ca;--color-success:#16a34a;--color-success-bg:#dcfce7;--color-danger:#dc2626;--color-danger-bg:#fee2e2;--color-warning:#f59e0b;--color-warning-bg:#fef3c7;--shadow-sm:0 4px 12px rgba(15,23,42,.06);--shadow-md:0 16px 40px rgba(15,23,42,.08);--radius-sm:8px;--radius-md:14px;--radius-lg:18px;--max-content-width:1200px;--transition-base:180ms ease;font-family:Inter,Hiragino Sans,Noto Sans JP,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*,:after,:before{box-sizing:border-box}body,html{padding:0;margin:0;background:var(--color-background);color:var(--color-text)}body{min-height:100vh}.page-shell{padding:clamp(1.5rem,1.5rem + 1vw,2.5rem)}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer;border:none;background:transparent}:focus-visible{outline:3px solid rgba(67,56,202,.45);outline-offset:2px}main{display:block}[data-elevated=true]{box-shadow:var(--shadow-sm)}.prose pre{padding:1rem;border-radius:var(--radius-sm);background:var(--color-surface-muted);overflow:auto}