:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --line:#e5e7eb;
  --primary:#2563eb;
  --shadow: 0 8px 24px rgba(17,24,39,.10);
  --radius:16px;
  --neutral:#64748b;       /* slate-500 */
  --neutral-weak:#f1f5f9;  /* slate-100 */
  --danger-weak:#fee2e2;   /* red-200 */
}

*{ box-sizing:border-box; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans KR", Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
}

.btn-row{
  display: flex;
  justify-content: center;   /* ✅ 가운데 정렬 */
  gap: 16px;                 /* 버튼 사이 간격 */
  margin-top: 12px;
}

.btn-row .btn{
  width: 40%;                /* ✅ 각각 40% */
}

/* 공통: semantic 버튼 베이스 */
.btn{
  border:1px solid transparent;
  color:#fff;
  padding:10px 14px;
  border-radius:12px;
  font-weight:800;
  cursor:pointer;
  line-height:1;
  margin-bottom: 10px;
}
.btn:hover{ filter:brightness(.98); }

/* size */
.btn-sm{ padding:8px 12px; border-radius:10px; font-size:13px; }

/* 의미별 */
.btn--primary{ background:var(--primary); border-color:var(--primary); }
.btn--danger{ background:var(--danger); border-color:var(--danger); }
.btn--neutral{ background:var(--neutral); border-color:var(--neutral); }

.login-wrap{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
}

.login-card{
  width:420px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:26px 24px;
}

.login-brand{
  font-weight:900;
  margin-bottom:10px;
}
.brand__ark{ color:var(--primary); }
.brand__admin{ margin-left:8px; }

.login-title{
  margin:0 0 18px;
  font-size:22px;
}

.field{ display:block; margin-bottom:14px; }
.label{ display:block; color:var(--muted); font-size:13px; margin-bottom:6px; }
input{
  width:100%;
  padding:12px 12px;
  border:1px solid var(--line);
  border-radius:12px;
  outline:0;
  font-size:14px;
}
input:focus{ border-color:var(--primary); box-shadow:0 0 0 3px rgba(37,99,235,.12); }

.btn-primary{
  width:100%;
  margin-top:6px;
  background:var(--primary);
  border:1px solid var(--primary);
  color:#fff;
  padding:12px 14px;
  border-radius:12px;
  font-weight:900;
  cursor:pointer;
}

.error{
  background:#fef2f2;
  border:1px solid #fecaca;
  color:#991b1b;
  padding:10px 12px;
  border-radius:12px;
  margin:8px 0 10px;
  font-weight:700;
  font-size:13px;
}

.login-foot{
  margin:18px 0 0;
  color:var(--muted);
  font-size:12px;
  text-align:center;
}