:root{font-family:system-ui,-apple-system,"Noto Sans JP",sans-serif;color:#162f3a;background:#edf4f6;color-scheme:light}*{box-sizing:border-box}body{margin:0;padding:32px 18px;min-height:100vh;display:grid;place-items:center}.login-card{width:100%;max-width:480px;background:white;border:1px solid #d8e5e9;border-radius:24px;padding:38px;box-shadow:0 20px 60px #173d4910}.brand{font-size:31px;letter-spacing:-1px;font-weight:850;color:#087d88;text-decoration:none}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.14em;margin:30px 0 12px;color:#087d88}h1{font-size:30px;line-height:1.5;letter-spacing:-.03em;margin:0 0 16px}.intro{font-size:14px;line-height:1.8;color:#4b626b}label{display:block;font-size:14px;font-weight:650;margin:22px 0 9px}input{font:inherit;width:100%;padding:14px 12px;border:1px solid #b8cdd3;border-radius:10px;min-height:49px}button{font:inherit;font-weight:750;border:0;border-radius:10px;background:#087d88;color:white;width:100%;padding:17px 12px;margin-top:25px;line-height:1.6;cursor:pointer}a{color:#087d88}a:focus-visible,input:focus-visible,button:focus-visible{outline:3px solid #eaa322;outline-offset:3px}button:disabled,input:disabled{opacity:.5;cursor:default}.help{font-size:13px;line-height:1.9;margin:25px 0}.back{font-size:14px}footer{font-size:11px;color:#667d86;margin-top:32px}.error{font-size:14px;line-height:1.7;background:#fff4ee;border:1px solid #efd3c0;padding:13px;border-radius:10px}@media(max-width:400px){body{padding:18px 12px}.login-card{padding:27px 23px;border-radius:18px}h1{font-size:26px}button{font-size:13px}}