html,
body { 
    height: 100%;
}

body { 
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    font-family: Roboto, sans-serif; 
    color: #3c3c3c;
}
.page { display: none; }
.page.card { padding: 1.6rem; }
.page.active { display: block; }
.error-msg { color: #dc3545; font-size: 0.85rem; display: none; }
.main-container {
    margin-top: 65px;
    flex: 1 0 auto;
}

.site-footer {
    flex-shrink: 0;
    background: #f8f9fa;
    color: #495057;
    font-size: 0.9rem;
    padding: 0.7rem 0;
    margin-top: auto;
}

.site-footer a {
    color: #0d6efd;
    text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus {
    text-decoration: underline;
}