:root{font-family:-apple-system,BlinkMacSystemFont,"Noto Sans JP","Yu Gothic",sans-serif;color:#101114;background:#f3f4f6}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#fff 0 68%,#eef1ff 68%)}
.login{background:#fff;max-width:900px;width:100%;min-height:660px;padding:36px 56px;display:flex;flex-direction:column;border:2px solid #101114;box-shadow:18px 18px 0 #3157ff}
.top,footer{display:flex;align-items:center;justify-content:space-between;gap:16px}
.top>span:last-child,footer,.eyebrow,label{font-size:11px;letter-spacing:.15em;font-weight:850}
.mark{font-size:36px;letter-spacing:-.12em;font-weight:950}
.mark span{color:#ff4d2e}
.rule{height:2px;background:#101114;margin-top:28px}
.body{max-width:540px;margin:auto 0;padding:45px 0}
.eyebrow{color:#3157ff}
.body h1{font-size:clamp(40px,6vw,70px);letter-spacing:-.07em;line-height:1.2;margin:21px 0;font-weight:950}
.body p{line-height:2;color:#55585f}
.body form{margin-top:40px}
label{display:block;margin-bottom:11px;color:#101114}
input{width:100%;height:58px;border:2px solid #101114;padding:0 17px;font-size:16px;background:#fff;border-radius:0}
input:focus{outline:4px solid #3157ff33;border-color:#3157ff}
.login-error{margin:9px 0 0;color:#d72f17;font-size:12px;line-height:1.6;font-weight:800}
button{width:100%;height:62px;margin-top:12px;border:0;border-radius:0;background:#101114;color:#fff;font:inherit;font-weight:850;cursor:pointer;display:flex;align-items:center;justify-content:space-between;padding:0 21px}
button:hover{background:#3157ff}
small{display:block;color:#74777e;line-height:1.9;margin-top:22px;font-size:12px}
footer{border-top:1px solid #dfe1e6;padding-top:20px;color:#666970}
footer span{color:#9b9ea5}
@media(max-width:600px){body{padding:12px}.login{min-height:calc(100vh - 24px);padding:24px;box-shadow:8px 8px 0 #3157ff}.top>span:last-child{font-size:9px}.body{padding:36px 0}footer{font-size:9px}}