:root{color-scheme:dark;--ink:#eef3ff;--muted:#aab7ce;--line:#7a94c040;--panel:#121b2b;--field:#0d1523;--accent:#a9caff}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,system-ui,-apple-system,"Segoe UI","Noto Sans KR",sans-serif}
body{background:radial-gradient(ellipse at 50% -20%,#243657 0,transparent 60%),#0b101b;color:var(--ink)}
.auth-page{min-height:100vh;min-height:100dvh;display:grid;place-items:center;padding:max(24px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}
.auth-shell{width:min(100%,440px);min-width:0}.back-link{display:inline-flex;align-items:center;gap:9px;min-height:44px;margin-bottom:10px;color:var(--muted);text-decoration:none;font-size:14px}.back-link span{font-size:24px}
.auth-card{padding:28px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(145deg,#172237,#101725);box-shadow:0 24px 70px #0005}
.brand{display:flex;align-items:center;gap:14px}.brand>div{min-width:0}.imo-logo{width:56px;height:64px;flex:0 0 56px;object-fit:contain;background:transparent}.brand small{font-size:12px;letter-spacing:.12em;color:var(--accent);font-weight:600}.brand h1{font-size:25px;line-height:1.32;letter-spacing:-.03em;margin:5px 0 0;overflow-wrap:anywhere;font-weight:650}
.auth-steps{list-style:none;display:flex;gap:12px;margin:24px 0 20px;padding:0}.auth-steps li{display:flex;align-items:center;gap:8px;flex:1;min-width:0;font-size:13px;color:#91a1bb;border-bottom:2px solid #50658238;padding-bottom:12px}.auth-steps li span{display:grid;place-items:center;flex:0 0 24px;height:24px;border:1px solid #859cc548;border-radius:50%;font-size:12px}.auth-steps .current{color:#dceaff;border-color:#87b3ff}.auth-steps .current span{background:#31518b;border-color:#8bb6ff}.auth-steps .done{color:#a9c2e8;border-color:#506c98}
.lead{font-size:14px;line-height:1.65;color:var(--muted);margin:18px 0}.auth-form{display:grid;gap:10px}.field{font-size:13px;font-weight:500;color:#d7e2f5}
.auth-form input:not([type="hidden"]){display:block;width:100%;min-width:0;min-height:52px;padding:13px 14px;border:1px solid #6b84ac66;border-radius:13px;background:var(--field);color:var(--ink);font:400 16px/1.4 system-ui,sans-serif;font-family:inherit;font-size:16px;outline:0}
.auth-form input:focus{border-color:#a9caff;box-shadow:0 0 0 3px #90baff20}.auth-form input::placeholder{color:#788aa7}.auth-form input[aria-invalid="true"]{border-color:#ef9fae}#auth-code{letter-spacing:.3em;font-variant-numeric:tabular-nums}
button{font:inherit}.primary,.secondary{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;min-height:50px;border-radius:13px;cursor:pointer;text-align:center;white-space:normal;font-size:14px;line-height:1.4;font-weight:600;padding:12px 14px}
.primary{margin-top:6px;border:1px solid #8db7fc;background:linear-gradient(135deg,#386cf0,#2853c6);color:#fff}.primary span{font-size:18px}.primary:hover{background:#3467df}.secondary{border:1px solid var(--line);background:#182438;color:#c6d8f3}.resend-form{margin-top:10px}
.email-summary{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:4px 12px}.email-value{margin:0;color:#d7e5ff;font-size:14px;overflow-wrap:anywhere;min-width:0;max-width:100%}.change-email{display:inline-flex;align-items:center;min-height:44px;color:#accaff;font-size:13px;text-underline-offset:4px}
.notice{padding:12px 14px;margin:12px 0;border:1px solid #7392c353;border-radius:13px;background:#1b2a42;color:#ccdefa;font-size:13px;line-height:1.6;overflow-wrap:anywhere}.notice.error{border-color:#c46f855e;background:#351e2b;color:#ffced9}.privacy{font-size:12px;line-height:1.65;color:#8fa0bb;margin:20px 0 0}
a:focus-visible,button:focus-visible{outline:2px solid #b4d1ff;outline-offset:3px}
@media(max-width:480px){.auth-page{align-items:start;padding-top:max(16px,env(safe-area-inset-top))}.auth-card{padding:22px 20px;border-radius:22px}.brand h1{font-size:23px}.brand{gap:12px}.imo-logo{width:48px;height:58px;flex-basis:48px}}
@media(max-height:550px){.auth-page{align-items:start;padding-top:max(10px,env(safe-area-inset-top))}.back-link{margin-bottom:4px}.auth-card{padding-top:18px}.auth-steps{margin:16px 0 12px}.lead{margin:12px 0}}

.auth-modes{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:20px 0 0}
.auth-modes a{display:grid;place-items:center;min-height:48px;padding:10px 8px;text-align:center;text-decoration:none;color:#b3c6e3;border:1px solid #526b914f;border-radius:12px;font-size:13px;line-height:1.4;overflow-wrap:anywhere}
.auth-modes a.selected{background:#23406d;border-color:#9dc4ff;color:#fff}
.auth-form input:not([type=hidden]){-webkit-text-fill-color:#eef3ff;caret-color:#eef3ff;color:#eef3ff}