:root {
  --brand: #2d6a4f;
  --brand-dark: #1b4332;
  --brand-light: #40916c;
  --brand-pale: #d8f3dc;
  --accent: #52b788;
  --ink: #1c1c1e;
  --muted: #6b7280;
  --bg: #f4f7f4;
  --surface: #ffffff;
  --border: #e2e8f0;
  --danger: #dc2626;
  --warn: #d97706;
  --info: #2563eb;
  --shadow: 0 1px 4px rgba(0,0,0,0.08);
  --radius: 10px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Apple SD Gothic Neo', -apple-system, 'Malgun Gothic', sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
}

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

/* ── Layout ─────────────────────────────────────────── */
.admin-wrap {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────── */
.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--brand-dark);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 50;
}
.sidebar-logo {
  padding: 24px 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-logo .logo-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}
.sidebar-logo .logo-sub {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
  display: block;
}
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  color: rgba(255,255,255,0.75);
  font-weight: 500;
  transition: background 0.15s;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
  background: rgba(255,255,255,0.08);
  color: #fff;
}
.sidebar-nav a.active { border-left: 3px solid var(--accent); padding-left: 17px; }
.sidebar-nav .nav-icon { font-size: 1rem; width: 20px; text-align: center; }
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
}
.sidebar-footer .admin-email { color: rgba(255,255,255,0.7); display: block; margin-bottom: 8px; font-size: 0.78rem; word-break: break-all; }
.btn-logout {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.7);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  font-family: inherit;
  width: 100%;
}
.btn-logout:hover { background: rgba(255,255,255,0.14); }

/* ── Main ─────────────────────────────────────────────── */
.main-content {
  margin-left: 220px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar h1 { font-size: 1.15rem; font-weight: 700; color: var(--ink); }
.topbar-meta { font-size: 0.82rem; color: var(--muted); }

.page-body { padding: 24px 28px; }

/* ── Cards / Stats ────────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.stat-card .label { font-size: 0.78rem; color: var(--muted); margin-bottom: 8px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.stat-card .value { font-size: 1.6rem; font-weight: 800; color: var(--brand); line-height: 1; }
.stat-card .sub { font-size: 0.78rem; color: var(--muted); margin-top: 4px; }
.stat-card.accent .value { color: var(--brand-light); }
.stat-card.warn .value { color: var(--warn); }

/* ── Table ──────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  overflow: hidden;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-header h2 { font-size: 0.95rem; font-weight: 700; }
.card-body { padding: 0; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 16px; text-align: left; vertical-align: middle; }
th { font-size: 0.76rem; font-weight: 700; color: var(--muted); background: var(--bg); border-bottom: 1px solid var(--border); text-transform: uppercase; letter-spacing: 0.04em; }
td { border-bottom: 1px solid var(--border); font-size: 0.86rem; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f8fdf9; }

/* ── Badge ───────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
}
.badge-green { background: var(--brand-pale); color: var(--brand); }
.badge-gray { background: #f1f5f9; color: #64748b; }
.badge-red { background: #fee2e2; color: var(--danger); }
.badge-yellow { background: #fef3c7; color: var(--warn); }
.badge-blue { background: #dbeafe; color: var(--info); }

/* ── Forms / Buttons ──────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 7px;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: filter 0.15s;
}
.btn:hover { filter: brightness(0.93); }
.btn-primary { background: var(--brand); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--ink); }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.83rem; font-weight: 600; margin-bottom: 6px; color: var(--ink); }
.form-group input, .form-group select {
  width: 100%; padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--surface);
  color: var(--ink);
}
.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(45,106,79,0.12);
}

/* ── Alert / Flash ─────────────────────────────────────── */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 0.88rem; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #6ee7b7; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #93c5fd; }

/* ── Pagination ─────────────────────────────────────────── */
.pagination { display: flex; gap: 6px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.pagination a, .pagination span {
  padding: 6px 10px; border-radius: 6px; font-size: 0.82rem;
  border: 1px solid var(--border); background: var(--surface);
}
.pagination a:hover { background: var(--brand-pale); }
.pagination .active { background: var(--brand); color: #fff; border-color: var(--brand); }

/* ── Login page ─────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand) 100%);
  padding: 20px;
}
.login-box {
  background: var(--surface);
  border-radius: 16px;
  padding: 40px 36px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 24px 48px rgba(0,0,0,0.18);
}
.login-logo { text-align: center; margin-bottom: 28px; }
.login-logo .logo-main { font-size: 2rem; margin-bottom: 6px; }
.login-logo h1 { font-size: 1.3rem; color: var(--brand-dark); font-weight: 800; }
.login-logo p { font-size: 0.82rem; color: var(--muted); margin-top: 4px; }
.login-box h2 { font-size: 1rem; font-weight: 700; margin-bottom: 20px; color: var(--ink); }
.login-box .btn-primary { width: 100%; padding: 12px; font-size: 1rem; margin-top: 6px; }
.login-note { font-size: 0.75rem; color: var(--muted); text-align: center; margin-top: 20px; line-height: 1.5; }

/* ── Search bar ─────────────────────────────────────────── */
.search-bar { display: flex; gap: 8px; margin-bottom: 16px; }
.search-bar input { flex: 1; padding: 8px 12px; border: 1px solid var(--border); border-radius: 7px; font-size: 0.88rem; font-family: inherit; }
.search-bar input:focus { outline: none; border-color: var(--brand); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { width: 0; overflow: hidden; }
  .main-content { margin-left: 0; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}