:root{
  --bg:#0b0f19;
  --text:#e5e7eb;
  --muted:#94a3b8;
  --line:rgba(148,163,184,.18);
  --primary:#22c55e;
  --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --max:1100px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  background: radial-gradient(1200px 800px at 20% 10%, rgba(34,197,94,.12), transparent 60%),
              radial-gradient(900px 700px at 80% 20%, rgba(59,130,246,.10), transparent 55%),
              var(--bg);
  color:var(--text);
}
a{color:inherit; text-decoration:none}
.container{max-width:var(--max); margin:0 auto; padding:18px}
.card{
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.pad{padding:18px}
.row{display:flex; gap:12px; align-items:center}
.between{justify-content:space-between}
.col{display:flex; flex-direction:column; gap:10px}
.grid{display:grid; gap:12px}
.grid-2{grid-template-columns:1fr 1fr}
@media (max-width:860px){.grid-2{grid-template-columns:1fr}}
.h1{font-size:20px; font-weight:800; letter-spacing:.2px}
.h2{font-size:15px; font-weight:700}
.muted{color:var(--muted); font-size:13px}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 12px; border-radius:12px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.05);
  color:var(--text);
  cursor:pointer;
}
.btn.primary{background: rgba(34,197,94,.16); border-color: rgba(34,197,94,.35)}
.btn.small{padding:7px 10px; border-radius:10px; font-size:13px}
.input{
  width:100%; padding:11px 12px; border-radius:12px;
  border:1px solid var(--line);
  background: rgba(2,6,23,.45);
  color:var(--text);
  outline:none;
}
.input:focus{border-color: rgba(34,197,94,.55); box-shadow: 0 0 0 3px rgba(34,197,94,.12)}
label{font-size:13px; color:var(--muted)}
.field{display:flex; flex-direction:column; gap:6px}
.topbar{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(12px);
  background: rgba(11,15,25,.72);
  border-bottom:1px solid var(--line);
}
.brand{font-weight:900; letter-spacing:.3px}
.nav a{
  padding:8px 10px; border-radius:10px; border:1px solid transparent;
  color:var(--muted); font-size:13px;
}
.nav a.active{color:var(--text); border-color: rgba(148,163,184,.22); background: rgba(255,255,255,.04)}
.toast{
  position:fixed; left:50%; bottom:18px; transform:translateX(-50%);
  z-index:9999; max-width:min(560px, calc(100% - 28px)); display:none;
}
.toast.show{display:block}
.toast .inner{
  padding:12px 14px; border-radius:14px;
  border:1px solid var(--line);
  background: rgba(2,6,23,.92);
  box-shadow: var(--shadow);
  font-size:13px;
}
.toast .inner.ok{border-color: rgba(34,197,94,.4)}
.toast .inner.err{border-color: rgba(239,68,68,.4)}
.overlay{
  position:fixed; inset:0; z-index:9998;
  background: rgba(0,0,0,.35);
  display:none; align-items:center; justify-content:center;
  backdrop-filter: blur(2px);
}
.overlay.show{display:flex}
.spinner{
  width:32px; height:32px;
  border-radius:50%;
  border:3px solid rgba(148,163,184,.25);
  border-top-color: rgba(34,197,94,.8);
  animation: spin .9s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.pageShell{min-height:calc(100vh - 62px)}
.authWrap{min-height:100vh; display:flex; align-items:center; justify-content:center; padding:18px}
.authCard{width:min(520px, 100%)}
.helpRow{display:flex; justify-content:space-between; align-items:center; gap:10px; flex-wrap:wrap}