* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f5f7fa;
  color: #1f2937;
}

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

.sidebar {
  width: 240px;
  background: #111827;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  padding: 24px 18px;
}

.sidebar-logo {
  display: flex;
  flex-direction: column;
  margin-bottom: 32px;
}

.sidebar-logo strong {
  font-size: 20px;
}

.sidebar-logo span {
  font-size: 13px;
  color: #9ca3af;
}

.sidebar-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.sidebar-menu a {
  color: #d1d5db;
  text-decoration: none;
  padding: 11px 12px;
  border-radius: 8px;
  font-size: 14px;
}

.sidebar-menu a:hover {
  background: #1f2937;
  color: #ffffff;
}

.sidebar-footer {
  border-top: 1px solid #374151;
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
}

.sidebar-footer a {
  color: #fca5a5;
  text-decoration: none;
}

.admin-content {
  flex: 1;
  padding: 32px;
}

.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  margin: 0;
  font-size: 28px;
}

.page-header p {
  margin: 6px 0 0;
  color: #6b7280;
}

.page-header.row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card,
.table-card,
.form-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 20px;
}

.card span {
  display: block;
  color: #6b7280;
  font-size: 14px;
  margin-bottom: 10px;
}

.card strong {
  font-size: 32px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  font-size: 13px;
  color: #6b7280;
  padding: 12px;
  border-bottom: 1px solid #e5e7eb;
}

td {
  padding: 12px;
  border-bottom: 1px solid #f3f4f6;
}

label {
  display: block;
  margin-bottom: 6px;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
}

input,
textarea,
select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.form-actions {
  margin-top: 24px;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 11px 16px;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
}

.btn-primary {
  background: #2563eb;
  color: #ffffff;
}

.btn-secondary {
  background: #e5e7eb;
  color: #111827;
}

.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111827;
}

.login-card {
  width: 360px;
  background: #ffffff;
  padding: 32px;
  border-radius: 14px;
}

.login-card h1 {
  margin: 0;
}

.login-card p {
  color: #6b7280;
  margin-bottom: 24px;
}

.login-card button {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: #2563eb;
  color: #ffffff;
  cursor: pointer;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}