body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding-top: 20px;
    padding-bottom: 20px;
}

.footer {
    background-color: #f8f9fa;
    padding: 20px 0;
    margin-top: auto;
}

.card {
    margin-bottom: 20px;
}

.container {
    max-width: 900px;
}

@media (max-width: 768px) {
    .navbar-nav {
        text-align: center;
    }
}

.navbar-custom {
    background-color: #2c3e50;
}

.navbar-custom .navbar-brand,
.navbar-custom .nav-link {
    color: #ecf0f1 !important;
}

.navbar-custom .nav-link:hover,
.navbar-custom .navbar-brand:hover {
    color: #ffd54f !important;
}

.navbar-custom .navbar-toggler {
    border-color: rgba(255,255,255,0.5);
}

.navbar-custom .nav-user-center {
    color: #ffd54f !important;
    font-weight: bold;
    background-color: rgba(255,213,79,0.15);
    border-radius: 15px;
    padding-left: 15px !important;
    padding-right: 15px !important;
    margin-right: 5px;
}

.navbar-custom .nav-user-center:hover {
    color: #2c3e50 !important;
    background-color: #ffd54f !important;
}

.alert-custom {
    border: 2px solid;
    border-radius: 5px;
    padding: 15px;
}

.card-header-custom {
    padding: 15px;
}

.btn-custom {
    border-radius: 4px;
}