.indent-form {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
}

.input-section,
.output-section {
    margin-bottom: 20px;
}

.indent-textarea {
    width: 100%;
    min-height: 300px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    line-height: 1.6;
    background: #f8f9fa;
    resize: vertical;
}

textarea:focus {
    outline: none;
    border-color: #0073aa;
    box-shadow: 0 0 5px rgba(0,115,170,0.2);
}

.button-section {
    margin: 15px 0;
    text-align: center;
}

.indent-button {
    background-color: #0073aa;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin: 5px;
    transition: background-color 0.2s;
}

.indent-button:hover {
    background-color: #005177;
}

.indent-button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.indent-button-secondary {
    background-color: #6c757d;
}

.indent-button-secondary:hover {
    background-color: #5a6268;
}

.button-section {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin: 15px 0;
}