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

main {
    flex: 1;
}

.navbar-brand {
    font-weight: 600;
}

.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: rgba(0, 0, 0, 0.03);
    font-weight: 500;
}

.arch-box {
    padding: 20px;
    border-radius: 10px;
    margin: 10px 0;
}

.arch-box.source {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.arch-box.vps {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.arch-box.qnap {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.arch-box.clients {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: #333;
}

.architecture-diagram {
    padding: 20px;
}

pre {
    margin-bottom: 1rem;
}

pre code {
    font-size: 0.875rem;
}

.table-responsive {
    border-radius: 0.375rem;
    overflow: hidden;
}

.btn-group-sm .btn {
    padding: 0.25rem 0.5rem;
}

.list-group-item-action:hover {
    background-color: #e9ecef;
}

.form-check-input:checked {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.alert-info {
    background-color: #cff4fc;
    border-color: #b6effb;
}

.accordion-button:not(.collapsed) {
    background-color: #e7f1ff;
    color: #0c63e4;
}

@media (max-width: 768px) {
    .arch-box {
        margin-bottom: 15px;
    }
    
    .display-4 {
        font-size: 2rem;
    }
}