:root { font-family: "Noto Sans KR", "Malgun Gothic", Arial, sans-serif; color: #102454; background: #eef3fb; }
* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; background: radial-gradient(circle at 20% 10%, #fff 0, #eef3fb 48%, #dce6f7 100%); }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(100%, 430px); padding: 42px; border-radius: 24px; background: #fff; box-shadow: 0 24px 70px rgba(14, 41, 91, .14); }
.eyebrow { margin: 0 0 10px; color: #4777c8; font-size: 12px; font-weight: 800; letter-spacing: .15em; }
h1 { margin: 0; color: #002060; font-size: 31px; }
.intro { margin: 12px 0 30px; color: #61708d; line-height: 1.6; }
label { display: block; margin: 17px 0 7px; font-size: 14px; font-weight: 700; }
input { width: 100%; height: 48px; padding: 0 14px; border: 1px solid #cbd6e9; border-radius: 11px; color: #102454; background: #fbfdff; font: inherit; outline: none; }
input:focus { border-color: #3d73d5; box-shadow: 0 0 0 3px rgba(61, 115, 213, .14); }
button { width: 100%; height: 50px; margin-top: 25px; border: 0; border-radius: 12px; color: #fff; background: #002060; font: inherit; font-weight: 800; cursor: pointer; }
button:hover { background: #07317d; }
button:disabled { opacity: .6; cursor: wait; }
.message { min-height: 22px; margin: 17px 0 0; color: #b42318; font-size: 14px; text-align: center; }
@media (max-width: 520px) { .login-card { padding: 30px 23px; } }