:root{--color-turquoise:#00d4ff;--color-turquoise-deep:#0087a6;--color-turquoise-soft:#ccf3fc;--color-yellow:#ffdf00;--color-yellow-deep:#e8c800;--color-yellow-soft:#fff8cc;--color-green:#8bd53e;--color-green-deep:#6bb020;--color-green-soft:#e6f4ce;--color-bg:#fdfcf8;--color-bg-subtle:#f7f4ea;--color-paper:#ffffff;--color-ink:#1f2328;--color-ink-strong:#252a31;--color-ink-soft:#3b434b;--color-ink-mute:#6b737c;--color-ink-faint:#a1a7ae;--color-line:#ece8dc;--color-line-strong:#dfdbcd;--color-primary:#0087a6;--color-primary-hover:#006f89;--color-footer-bg:#252a31;--color-footer-line:rgba(255,255,255,0.1);--color-footer-text:rgba(255,255,255,0.62);--color-footer-muted:rgba(255,255,255,0.42);--font-body:"Noto Sans JP","DM Sans",system-ui,sans-serif;--font-display:"DM Sans",system-ui,sans-serif;--font-mono:"DM Mono",ui-monospace,monospace;--radius-sm:12px;--radius-md:16px;--radius-pill:999px;--shadow-soft:0 24px 60px rgba(31,35,40,0.06);--content-width:1200px;--content-pad:clamp(24px,5vw,56px);--section-gap-lg:clamp(72px,10vw,112px);--section-gap-md:clamp(40px,6vw,64px);--section-gap-sm:clamp(24px,4vw,40px);--transition-fast:0.15s ease}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--color-bg);color:var(--color-ink);font-family:var(--font-body);font-size:16px;font-weight:500;line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img{display:block;max-width:100%}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{border:0;background:none}ol,ul{list-style:none}::selection{background:var(--color-turquoise-soft);color:var(--color-ink-strong)}