@import "https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;900&display=swap";
:root{--green:#1d63e8;--green-dark:#0c2246;--mint:#eaedf2;--mint2:#f1f3f7;--ink:#1b1e24;--muted:#4c515a;--line:#e2e4e8;--soft:#f6f7f9;--gold:#b8893f;--red:#9a4a3c;--bg:#fff;--content-max:1180px;--read-max:760px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--bg);letter-spacing:0;-webkit-font-smoothing:antialiased;margin:0;font-family:Noto Sans JP,system-ui,sans-serif;font-size:15px;line-height:1.85}a{color:inherit;text-decoration:none}a:hover{color:var(--green);text-underline-offset:3px;text-decoration:underline}button,input,select{font:inherit;border-radius:0}button:disabled{cursor:not-allowed;opacity:.55}svg{display:block}.site-header{z-index:20;border-bottom:1px solid var(--line);background:#fffffff5;justify-content:space-between;align-items:center;gap:24px;height:64px;padding:0 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