:root {
  --bg: #f0f2f5;
  --card: #ffffff;
  --ink: #1a1f2c;
  --muted: #64748b;
  --line: #e2e8f0;
  --brand: #1d4ed8;
  --brand-soft: #eff6ff;
  --sidebar: #0f172a;
  --sidebar-text: #cbd5e1;
  --ok: #059669;
  --warn: #d97706;
  --danger: #dc2626;
  --radius: 12px;
  --font: "Pretendard", "Noto Sans KR", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Login (만만세 스타일: 중앙 카드) ── */
.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: #f8f9fa;
}
.auth-card {
  width: 100%;
  max-width: 330px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 2rem 1.5rem 1.75rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}
.auth-card h1 {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  text-align: center;
  letter-spacing: -0.02em;
}
.auth-card .hint {
  margin: 0 0 1.25rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.45;
}
.auth-card label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0 0 0.35rem;
}
.auth-card .field { margin-bottom: 0.9rem; }
.auth-card input {
  width: 100%;
  border: 1px solid #ced4da;
  border-radius: 0.5rem;
  padding: 0.7rem 0.85rem;
  font-size: 1rem;
  background: #fff;
}
.auth-card input:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
}
.auth-card .btn {
  width: 100%;
  margin-top: 0.5rem;
  border: 0;
  border-radius: 0.5rem;
  padding: 0.8rem 1rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  background: var(--brand);
  cursor: pointer;
}
.auth-card .btn:hover { filter: brightness(1.05); }
.auth-error {
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fecaca;
  border-radius: 0.5rem;
  padding: 0.65rem 0.75rem;
  font-size: 0.875rem;
  margin-bottom: 0.9rem;
}
.otp-qr {
  display: block;
  width: 180px;
  height: 180px;
  margin: 0 auto 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.otp-secret {
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
  word-break: break-all;
  background: #f8fafc;
  border-radius: 6px;
  padding: 0.5rem 0.65rem;
  margin-bottom: 0.9rem;
  text-align: center;
}

/* ── Shell ── */
.shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}
.sidebar {
  background: var(--sidebar);
  color: var(--sidebar-text);
  padding: 1.25rem 0.9rem;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.35rem 0.65rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 1rem;
}
.brand strong {
  color: #fff;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.brand span { font-size: 0.75rem; color: #94a3b8; }
.nav a {
  display: block;
  color: var(--sidebar-text);
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  margin-bottom: 0.2rem;
  text-decoration: none;
  font-size: 0.92rem;
}
.nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav a.active {
  background: rgba(37, 99, 235, 0.35);
  color: #fff;
  font-weight: 600;
}
.sidebar-foot {
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 1rem;
  font-size: 0.8rem;
  color: #94a3b8;
}
.sidebar-foot a { color: #e2e8f0; }

.main { padding: 1.25rem 1.5rem 2rem; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.1rem;
}
.topbar h1 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}
.topbar .who { color: var(--muted); font-size: 0.9rem; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}
.stat {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.stat .label { color: var(--muted); font-size: 0.8rem; margin-bottom: 0.35rem; }
.stat .value { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.03em; }

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 1.15rem;
}
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: end;
  margin-bottom: 0.9rem;
  padding: 0.85rem;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.filter-bar label {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}
.filter-bar input,
.filter-bar select {
  border: 1px solid #ced4da;
  border-radius: 6px;
  padding: 0.45rem 0.55rem;
  font-size: 0.9rem;
  background: #fff;
  min-width: 120px;
}
.filter-bar .btn,
.btn {
  border: 0;
  border-radius: 6px;
  padding: 0.5rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--brand);
  color: #fff;
}
.btn-ghost {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line) !important;
}
.btn-danger { background: var(--danger); }
.btn-warn { background: var(--warn); }
.btn-sm { padding: 0.3rem 0.55rem; font-size: 0.8rem; }

.table-wrap {
  overflow: auto;
  max-height: 70vh;
  border: 1px solid var(--line);
  border-radius: 10px;
}
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
table.data th,
table.data td {
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}
table.data th {
  position: sticky;
  top: 0;
  background: #0f172a;
  color: #fff;
  font-weight: 600;
  z-index: 1;
}
table.data th a { color: #fff; text-decoration: none; }
table.data tbody tr:hover td { background: #f8fafc; }
.badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-ok { background: #d1fae5; color: #065f46; }
.badge-off { background: #fee2e2; color: #991b1b; }
.badge-admin { background: var(--brand-soft); color: var(--brand); }
.badge-muted { background: #e2e8f0; color: #475569; }

.flash {
  padding: 0.7rem 0.85rem;
  border-radius: 8px;
  margin-bottom: 0.85rem;
  font-size: 0.9rem;
}
.flash-ok { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.flash-err { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

.pager {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 0.9rem;
  align-items: center;
}
.pager a, .pager span {
  display: inline-block;
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 0.85rem;
  color: var(--ink);
  text-decoration: none;
}
.pager .cur { background: var(--brand); color: #fff; border-color: var(--brand); }

.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(15,23,42,0.45);
  display: none;
  place-items: center;
  z-index: 50;
  padding: 1rem;
}
.modal-backdrop.open { display: grid; }
.modal {
  background: #fff;
  border-radius: 12px;
  width: min(480px, 100%);
  padding: 1.1rem 1.2rem 1.2rem;
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}
.modal h3 { margin: 0 0 0.85rem; font-size: 1.05rem; }
.modal .row { margin-bottom: 0.7rem; }
.modal label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.25rem; }
.modal input, .modal select, .modal textarea {
  width: 100%;
  border: 1px solid #ced4da;
  border-radius: 6px;
  padding: 0.5rem 0.6rem;
  font: inherit;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
}
.pre-box {
  white-space: pre-wrap;
  word-break: break-word;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.85rem;
  max-height: 60vh;
  overflow: auto;
  font-size: 0.875rem;
}

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: relative;
    height: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    align-items: center;
  }
  .brand { border: 0; margin: 0; padding: 0.25rem 0.5rem; }
  .nav { display: flex; flex-wrap: wrap; gap: 0.2rem; }
  .sidebar-foot { position: static; margin-left: auto; }
}