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, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow-x: hidden; /* bloqueia scroll horizontal */
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

main.container {
    flex: 1 0 auto; /* expande para preencher espaço */
    margin-top: 1rem;
    margin-bottom: 1rem;
}

footer {
    flex-shrink: 0; /* não encolhe */
    background-color: #ffffff;
    padding: 1rem 0;
    font-size: 0.9rem;
    border-top: 1px solid #dee2e6;
    text-align: center;
}