:root{--navy:#0d2247;--blue:#1765ff;--muted:#7c8da8;--line:#dce5f2;--surface:#fff}
*{box-sizing:border-box}
html,body{min-height:100%;margin:0}
body{overflow-x:hidden;background:radial-gradient(circle at 92% 8%,#dce9ff 0,transparent 30%),radial-gradient(circle at 18% 100%,#dffbf1 0,transparent 26%),#f4f7fc;color:var(--navy);font-family:Arial,"Noto Sans KR",sans-serif}
button,input{font:inherit}
.entry-shell{min-height:100dvh;display:grid;place-items:center;padding:32px 18px calc(32px + env(safe-area-inset-bottom))}
.entry-card{width:min(100%,560px);padding:52px 48px 42px;border:1px solid rgba(255,255,255,.85);border-radius:38px;background:rgba(255,255,255,.94);box-shadow:0 28px 70px rgba(28,55,95,.13);backdrop-filter:blur(16px)}
.brand-mark{display:grid;place-items:center;width:72px;height:72px;border-radius:23px;background:linear-gradient(135deg,#1264ff,#6554f6);color:#fff;font-size:32px;font-weight:900;box-shadow:0 18px 34px rgba(35,98,255,.25)}
.eyebrow{margin:28px 0 12px;color:var(--blue);font-size:13px;font-weight:900;letter-spacing:.2em}
h1{margin:0;font-size:clamp(36px,5vw,52px);line-height:1.13;letter-spacing:-.045em}
.intro{margin:24px 0 34px;color:var(--muted);font-size:17px;line-height:1.75}
.login-form{display:grid;gap:20px}
label{display:grid;gap:9px;font-size:14px;font-weight:900}
input{width:100%;padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff;color:var(--navy);font-size:16px;outline:none}
input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,101,255,.11)}
button{display:flex;align-items:center;justify-content:space-between;width:100%;padding:19px 22px;border:0;border-radius:17px;background:linear-gradient(90deg,#1264ff,#3472ff);color:#fff;font-weight:900;cursor:pointer;box-shadow:0 18px 34px rgba(23,101,255,.23)}
button:disabled{cursor:wait;opacity:.68}
.routing-panel{display:grid;justify-items:center;gap:9px;padding:30px 18px;border-radius:18px;background:#f5f8fe;text-align:center}
.routing-panel small{color:var(--muted)}
.spinner{width:28px;height:28px;border:3px solid #d9e5fb;border-top-color:var(--blue);border-radius:50%;animation:spin .8s linear infinite}
.message{min-height:24px;margin:16px 0 0;color:#f04461;font-size:14px}
.privacy{margin:8px 0 0;color:#a0aec2;text-align:center;font-size:13px}
[hidden]{display:none!important}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:620px){.entry-shell{place-items:start center;padding:16px 12px calc(20px + env(safe-area-inset-bottom))}.entry-card{padding:38px 26px 30px;border-radius:30px}.brand-mark{width:64px;height:64px;border-radius:20px}.eyebrow{margin-top:24px}.intro{font-size:15px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}