.link_container {
    width: 100%;
    max-width: 800px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    padding: 30px;
    margin: 20px auto;
    display: flex;
    flex-direction: column;
}

.link_container ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    width: 100%;
}

.link_container li {
    border-bottom: 1px solid #eee;
    transition: background-color 0.3s ease;
}

.link_container li:last-child {
    border-bottom: none;
}

.link_container li:hover {
    background-color: #f0f7ff;
}

.link_container a {
    display: block;
    padding: 15px 10px;
    text-decoration: none;
    color: #333;
    font-size: 1.1rem;
    font-weight: 500;
    transition: color 0.3s ease, padding-left 0.3s ease;
}

.link_container a:hover {
    color: #5488ef;
    padding-left: 20px;
}

.message_container {
    width: 100%;
    max-width: 800px;
    margin: 10px auto;
    text-align: center;
    font-size: 1.1rem;
    font-weight: bold;
}

.message_container:not(:empty) {
    padding: 15px;
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .link_container {
        width: 95%;
        padding: 15px;
    }

    .link_container a {
        font-size: 1rem;
        padding: 12px 5px;
    }
}