.card {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}
.card-header {
    background-color: #f1f3f5;
    font-weight: 500;
}
textarea {
    font-family: 'Courier New', monospace;
    resize: vertical;
    min-height: 300px;
}
.diff-added {
    background-color: #d4edda;
    text-decoration: none;
}
.diff-removed {
    background-color: #f8d7da;
    text-decoration: line-through;
}
.comparison-container {
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
    min-height: 300px;
    padding: 12px;
    border: 1px solid #ced4da;
    border-radius: 0.375rem;
    background-color: #f8f9fa;
    overflow: auto;
}
.btn-compare {
    background-color: #0d6efd;
    color: white;
}
.btn-compare:hover {
    background-color: #0b5ed7;
}
.comparison-result {
    display: none;
}
.footer {
    text-align: center;
    margin-top: 30px;
    color: #6c757d;
    font-size: 0.9rem;
}
.line-number {
    color: #6c757d;
    padding-right: 10px;
    text-align: right;
    user-select: none;
}
.comparison-line {
    display: flex;
    min-height: 1.2em;
}
.diff-info {
    font-size: 0.9rem;
}