:root{--ink:#172338;--muted:#586579;--line:#dce2ea;--paper:#fff;--bg:#f3f6fa;--rail:#112438;--accent:#ddf28c;--blue:#164fbd;--danger:#ab252e;color:var(--ink);background:var(--bg);font-family:Arial,Noto Sans JP,Yu Gothic,Meiryo,sans-serif}*{box-sizing:border-box}body{margin:0;font-size:16px;line-height:1.65}a{color:var(--blue);text-underline-offset:4px}button,input,select{font:inherit}button,.button{cursor:pointer;background:var(--blue);color:#fff;border:1px solid #0000;border-radius:6px;padding:10px 18px;font-weight:700;text-decoration:none;display:inline-block}button:disabled{opacity:.5;cursor:not-allowed}.secondary{color:var(--ink);border-color:var(--line);background:#fff}.danger{color:var(--danger);background:#fff3f3;border-color:#ecc9cc}input,select{width:100%;color:var(--ink);background:#fff;border:1px solid #aebac9;border-radius:5px;padding:10px 12px}input:focus,select:focus,button:focus-visible,a:focus-visible{outline-offset:3px;outline:3px solid 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