html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  white-space: nowrap;
  line-height: 60px;
}

/* Custom styles for the email sender app */
.card {
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  border: 1px solid rgba(0, 0, 0, 0.125);
}

.card-header {
  background-color: #f8f9fa;
  border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.table th {
  border-top: none;
  font-weight: 600;
}

.badge {
  font-size: 0.75em;
}

.btn-group .btn {
  border-radius: 0.25rem;
  margin-right: 0.125rem;
}

.btn-group .btn:last-child {
  margin-right: 0;
}

/* Status indicators */
.status-success {
  color: #198754;
}

.status-error {
  color: #dc3545;
}

.status-warning {
  color: #fd7e14;
}

/* Loading states */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Custom alerts */
.alert {
  border: none;
  border-radius: 0.5rem;
}

.alert-success {
  background-color: #d1edff;
  color: #0c5460;
}

.alert-danger {
  background-color: #f8d7da;
  color: #721c24;
}

.alert-warning {
  background-color: #fff3cd;
  color: #856404;
}

.alert-info {
  background-color: #d1ecf1;
  color: #0c5460;
}

/* Navigation */
.navbar-brand {
  font-weight: 600;
}

.nav-link {
  font-weight: 500;
}

/* Forms */
.form-label {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.form-control:focus {
  border-color: #86b7fe;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* Custom spacing */
.section-spacing {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

/* Statistics cards */
.stat-card {
  transition: transform 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
}

/* Table enhancements */
.table-hover tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.075);
}