*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--navy:#1a2744;--navy-light:#243352;--navy-dark:#111b30;--gold:#c9a962;--gold-light:#d4bc7e;--white:#ffffff;--grey-bg:#f5f7fa;--grey-100:#eef0f3;--grey-200:#dde1e7;--grey-300:#b8bfc9;--grey-500:#6b7280;--grey-700:#374151;--grey-900:#111827;--red:#dc2626;--green:#16a34a;--radius:6px;--shadow:0 1px 3px rgba(0,0,0,0.08);--shadow-md:0 4px 6px rgba(0,0,0,0.07)}html{font-family:Noto Sans JP,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--grey-900);background:var(--grey-bg);line-height:1.6;font-size:15px}body{min-height:100vh;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}.header{background:var(--navy);color:var(--white);padding:0 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