.navbar {
    background-color: #3498db;
}
.navbar-brand, .nav-link {
    color: white !important;
}
.main-content {
    margin-top: 2rem;
}



.navbar .navbar-nav .nav-link {
    color: #ffffff;
    font-size: 1.1em;
}

.navbar .navbar-nav .nav-link:hover {
    color: #ffffff;
}

.navbar .navbar-nav .nav-item {
    position: relative;
}

.navbar .navbar-nav .nav-item::after {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    background-color: #ffffff;
    width: 0%;
    content: "";
    height: 4px;
    transition: all 0.5s;
}

.navbar .navbar-nav .nav-item:hover::after {
    width: 100%;
}



.alert {
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid transparent;
    border-radius: 4px;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-danger, .alert-error {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}


#snackbar {
    visibility: hidden;
    min-width: 250px;
    margin-left: -125px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 14px;
    padding: 16px;
    position: fixed;
    z-index: 1;
    left: 50%;
    bottom: 30px;
    font-size: 17px;
  }

#snackbar.show {
    visibility: visible;
    -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
    animation: fadein 0.5s, fadeout 0.5s 2.5s;
    }

@-webkit-keyframes fadein {
    from {bottom: 0; opacity: 0;} 
    to {bottom: 30px; opacity: 1;}
    }

@keyframes fadein {
    from {bottom: 0; opacity: 0;}
    to {bottom: 30px; opacity: 1;}
    }

@-webkit-keyframes fadeout {
    from {bottom: 30px; opacity: 1;} 
    to {bottom: 0; opacity: 0;}
    }

@keyframes fadeout {
    from {bottom: 30px; opacity: 1;}
    to {bottom: 0; opacity: 0;}
    }


.logout-form {
    display: inline;
}

.btn {
    min-width: 90px;
    font-size: 0.98rem;
    border-radius: 0.5rem;
    box-shadow: none;
    transition: background 0.15s;
}