.hover-border {
    padding: 20px;
    margin: 10px;
    background: white;
    border: 2px solid #bdc3c7;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    display: inline-block;
    min-width: 200px;
}

.hover-border:hover {
    border-color: #3498db;
    border-width: 4px;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.hover-style:hover {
    border-style: dashed;
}

.hover-rainbow:hover {
    border-top-color: #e74c3c;
    border-right-color: #f39c12;
    border-bottom-color: #2ecc71;
    border-left-color: #9b59b6;
}