:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1c2033;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --border: #e5e7eb;
  --sidebar-bg: #14162b;
  --sidebar-text: #b6b9d6;
  --sidebar-active: #4f46e5;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
}

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 250px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 24px 16px;
  flex-shrink: 0;
}

.sidebar .brand {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 32px;
  padding: 0 8px;
}

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  border-radius: 8px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 4px;
  transition: background .15s, color .15s;
}

.sidebar nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar nav a.active { background: var(--sidebar-active); color: #fff; font-weight: 600; }
.sidebar nav .section-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #5c6089;
  margin: 18px 8px 6px;
}

.main { flex: 1; padding: 28px 32px; max-width: 1400px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.topbar h1 { font-size: 22px; margin: 0; }
.topbar .admin-chip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--muted);
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 20px;
}

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.stat-card .label { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.stat-card .value { font-size: 26px; font-weight: 700; }
.stat-card .delta { font-size: 12px; color: var(--success); margin-top: 4px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tr:hover td { background: #fafbff; }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 8px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: opacity .15s;
}
.btn:hover { opacity: .9; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-danger { background: #fee2e2; color: var(--danger); }
.btn-success { background: #dcfce7; color: var(--success); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }

.badge { padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge-active { background: #dcfce7; color: var(--success); }
.badge-paused { background: #fef3c7; color: var(--warning); }
.badge-pending { background: #e0e7ff; color: var(--primary); }
.badge-rejected { background: #fee2e2; color: var(--danger); }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}

/* Toggle switch */
.switch { position: relative; display: inline-block; width: 46px; height: 26px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; cursor: pointer; inset: 0;
  background: #d1d5db; border-radius: 34px; transition: .2s;
}
.slider:before {
  content: ""; position: absolute; height: 20px; width: 20px;
  left: 3px; bottom: 3px; background: white; border-radius: 50%; transition: .2s;
}
input:checked + .slider { background: var(--success); }
input:checked + .slider:before { transform: translateX(20px); }

.toggle-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 4px; border-bottom: 1px solid var(--border);
}
.toggle-row:last-child { border-bottom: none; }
.toggle-row .name { font-weight: 600; font-size: 15px; }
.toggle-row .desc { font-size: 13px; color: var(--muted); margin-top: 2px; }
.toggle-row .notice { font-size: 12px; color: var(--warning); margin-top: 6px; max-width: 520px; }

.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg);
}
.login-card {
  background: #fff; padding: 40px; border-radius: 16px; width: 360px;
  box-shadow: 0 10px 40px rgba(0,0,0,.08);
}