body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: #f3f4f8;
  margin: 0;
  color: #1f2430;
}

.topbar {
  background: linear-gradient(135deg, #111827 0%, #1f2937 60%, #0f172a 100%);
  color: #fff;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.25);
}

.nav a {
  color: #fff;
  text-decoration: none;
  margin-left: 16px;
}

.logo {
  font-weight: 600;
  letter-spacing: 0.4px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.08);
  padding: 6px 12px;
  border-radius: 999px;
}

.nav-email {
  font-size: 13px;
  color: #e2e8f0;
}

.nav-link {
  color: #fff;
  text-decoration: none;
}

.container {
  max-width: 1000px;
  margin: 24px auto;
  padding: 0 16px 40px;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 22px;
  margin-bottom: 20px;
  box-shadow: 0 10px 24px rgba(16, 24, 40, 0.08);
  border: 1px solid #eef2f7;
}

.form-grid {
  display: grid;
  gap: 12px;
}

.form-grid input,
.form-grid select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #d7dce4;
  margin-top: 6px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-grid input:focus,
.form-grid select:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
}

.primary {
  background: #2563eb;
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
}

.secondary {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  text-decoration: none;
  color: #374151;
}

.danger {
  background: #ef4444;
  color: #fff;
  border: none;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.table th,
.table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid #e5e7eb;
}

.table tbody tr:hover {
  background: #f8fafc;
}

.actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.flash {
  margin-bottom: 16px;
}

.flash-item {
  background: #ecfeff;
  border: 1px solid #a5f3fc;
  color: #155e75;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 8px;
}

.hint {
  margin-top: 8px;
  color: #6b7280;
  font-size: 14px;
}

.auth-card {
  max-width: 480px;
  margin: 40px auto;
}