:root { color-scheme: dark; font-family: "Apple SD Gothic Neo", "Noto Sans KR", sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: #07100d; color: #d7f4e9; }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: radial-gradient(circle at 50% 38%, rgba(31, 104, 82, .22), transparent 42%); }
.login-card { width: min(100%, 360px); padding: 34px 30px 30px; border: 1px solid #1e6b59; background: rgba(5, 17, 14, .96); box-shadow: 0 22px 80px rgba(0,0,0,.45); }
.sigil { width: 48px; height: 48px; margin: 0 auto 18px; display: grid; place-items: center; border: 1px solid #55b99d; color: #8ee2c8; font: 700 26px serif; }
h1 { margin: 0; text-align: center; font-size: 22px; letter-spacing: -.02em; }
p { margin: 8px 0 25px; text-align: center; color: #7fa99c; font-size: 13px; }
label { display: block; margin: 14px 0; }
label span { display: block; margin-bottom: 7px; color: #a6c9be; font-size: 13px; }
input { width: 100%; height: 44px; padding: 0 12px; border: 1px solid #245e50; outline: none; background: #06130f; color: #e8fff7; font: inherit; }
input:focus { border-color: #64c4a8; box-shadow: 0 0 0 2px rgba(100,196,168,.12); }
button { width: 100%; height: 44px; margin-top: 8px; border: 1px solid #60bda3; background: #123d32; color: #e5fff6; font: 700 15px inherit; cursor: pointer; }
button:hover { background: #195344; }
button:disabled { opacity: .55; cursor: wait; }
.login-error { min-height: 20px; margin-top: 13px; color: #ff9f9f; text-align: center; font-size: 13px; }

.login-shell { position:relative; overflow:hidden; isolation:isolate; }
.world-backdrop { position:absolute; inset:0; z-index:-2; background-position:center; background-size:cover; filter:saturate(.9); transform:scale(1.02); }
.login-shell::after { content:""; position:absolute; inset:0; z-index:-1; background:radial-gradient(circle at 50% 38%, rgba(31,104,82,.12), transparent 45%); pointer-events:none; }
.login-card { backdrop-filter: blur(8px); }