:root{--ink:#172a29;--muted:#60736e;--paper:#f5f6ef;--white:#fff;--line:#dce3d9;--green:#16594f;--lime:#d6ed88;--rose:#a34538}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:Inter,"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7}a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}button,input,select,textarea{font:inherit}button,a.button{cursor:pointer;border:1px solid var(--line);border-radius:8px;padding:10px 17px;background:white;color:var(--ink);display:inline-block;line-height:1.4;text-decoration:none;font-weight:600}button.primary,a.primary{background:var(--green);color:white;border-color:var(--green)}button:hover,a.button:hover{filter:brightness(.94)}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid 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