:root {
  --primary: #54155b;
  --primary-dark: #3a0d3f;
  --primary-light: #751c82;
  --accent-gold: #f59e0b;
  --accent-gold-light: #fbbf24;
  --secondary: #64748b;
  --bg-main: #f8fafc;
  --sidebar-bg: #1e0524;
  --sidebar-hover: #32093d;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
}

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

body {
  font-family: 'Sarabun', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-dark);
  min-height: 100vh;
}

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

.admin-sidebar {
  width: 260px;
  background: linear-gradient(180deg, #24052b 0%, #15021a 100%);
  color: #fff;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  box-shadow: 2px 0 15px rgba(0,0,0,0.15);
}

.admin-sidebar .brand {
  padding: 22px 16px 18px;
  font-size: 1.1rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 10px;
}

.admin-sidebar .brand img {
  height: 54px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.4));
}

.admin-nav {
  list-style: none;
  padding: 15px 0;
  flex-grow: 1;
}

.admin-nav li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.2s;
  border-left: 4px solid transparent;
}

.admin-nav li a:hover {
  background-color: var(--sidebar-hover);
  color: #fff;
}

.admin-nav li.active a {
  background: linear-gradient(90deg, rgba(245, 158, 11, 0.18) 0%, rgba(117, 28, 130, 0.25) 100%);
  color: #fbbf24;
  border-left: 4px solid #f59e0b;
  font-weight: 600;
}

.admin-main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.admin-header {
  height: 65px;
  background: #fff;
  border-bottom: 1px solid var(--border-color);
  padding: 0 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-content {
  padding: 30px;
  flex-grow: 1;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  border: 1px solid var(--border-color);
  padding: 24px;
  margin-bottom: 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-box {
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-box .number {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-primary { 
  background: linear-gradient(135deg, #54155b 0%, #751c82 100%); 
  color: #fff; 
  box-shadow: 0 2px 8px rgba(84, 21, 91, 0.25);
}
.btn-primary:hover { 
  background: linear-gradient(135deg, #420f48 0%, #5e1669 100%); 
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(84, 21, 91, 0.35);
  color: #fff;
}
.btn-danger { background: #dc3545; color: #fff; }
.btn-danger:hover { background: #bd2130; }
.btn-secondary { background: #e2e8f0; color: #475569; }
.btn-secondary:hover { background: #cbd5e1; }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

table.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}

table.admin-table th,
table.admin-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

table.admin-table th {
  background: #f8fafc;
  color: #475569;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
}

table.admin-table tr:hover {
  background-color: #f1f5f9;
}

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef9c3; color: #854d0e; }
.badge-info { background: #e0f2fe; color: #075985; }

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(84, 21, 91, 0.18);
}

textarea.form-control {
  min-height: 120px;
}