:root {
    --secondary-color: #28a745;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.calculator-container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 15px;
}

h3 {
    margin-top: 0;
    font-size: 18px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #444;
    font-size: 14px;
}

.btn {
    cursor: pointer;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    padding: 14px;
    transition: 0.3s;
}

.btn-add {
    background-color: var(--secondary-color);
    color: white;
    margin-bottom: 15px;
    font-size: 13px;
}

.btn-calc {
    background: #6BF3F2;
    color: white;
    width: 100%;
    max-width: 400px;
    font-size: 18px;
}

.btn-calc:hover {
    transform: scale(1.02);
}

.promo-row {
    display: grid;
    grid-template-columns: 1fr 1fr 50px;
    gap: 15px;
    background: #f8f9fa;
    /* padding: 12px; */
    border: 1px solid #e9ecef;
    border-radius: 10px;
    margin-bottom: 12px;
    align-items: center;
}

.btn-del {
    border-radius: 6px;
    cursor: pointer;
    height: 35px;
}

.table-wrapper {
    overflow-x: auto;
    margin-top: 15px;
    border-radius: 12px;
    border: 1px solid #dee2e6;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    background: white;
    min-width: 1100px;
}

th {
    background: #6BF3F2;
    color: black;
    padding: 12px;
    font-weight: 6000;
    text-align: center;
}

td {
    border-bottom: 1px solid #f1f1f1;
    padding: 10px;
    text-align: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 15px;
}

@media (max-width: 768px) {
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .promo-row {
        grid-template-columns: 1fr;
    }
}

.bottom-btn {
    margin-top: 10px;
    margin-bottom: 20px;
}

.total-net-arrear {
    color: #198754;
    font-weight: bold;
}