.transaction-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 10px;
    background-color: #000;
    color: #fff;
    min-height: 100vh;
}

.transaction-title {
    margin-top: 0;
    margin-bottom: 40px;
    text-align: center;
    color: #fff;
}

.form-group {
    margin-bottom: 40px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 12px;
    background-color: #333;
    border: 1px solid #555;
    border-radius: 4px;
    color: #fff;
    font-size: 16px;
    box-sizing: border-box;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: #fff;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.button {
    padding: 10px 20px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.button-primary {
    background-color: #fff;
    color: #000;
}

.button-primary:active {
    background-color: #ddd;
}

.button-secondary {
    background-color: transparent;
    color: #fff;
}

.button-secondary:active {
    background-color: #333;
}

#amountGroup {
    margin-top: 40px;
}

#category-group {
    display: none;
}

/* Для улучшения UX на мобильных устройствах */
@media (max-width: 600px) {
    .transaction-container {
        padding: 15px;
    }
    
    .form-buttons {
        flex-direction: column;
    }
    
    .button {
        width: 100%;
    }
}