.offer-page {
    font-family: Arial, sans-serif;
    max-width: 720px;
    margin: 40px auto;
    padding: 0 15px;
    color: #343a40;
    background-color: #f8f9fa;
    line-height: 1.6;
}

.offer-page-h1 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 28px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.offer-page-section {
    background: #fff;
    padding: 20px 25px;
    margin-bottom: 30px;
    border-radius: 10px;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.05);
}

.offer-page-section h2 {
    font-size: 22px;
    margin-bottom: 16px;
    color: #212529;
    border-bottom: 2px solid #dee2e6;
    padding-bottom: 6px;
}

.offer-page-service-item {
    margin-bottom: 14px;
}

.offer-page-service-item strong {
    display: block;
    font-size: 16px;
    margin-bottom: 6px;
    color: #0077b5;
}

.offer-page-price {
    color: #28a745;
    font-weight: 700;
}

.offer-page-btn-link.return-home {
    display: inline-block;
    padding: 10px 20px;
    background-color: #007bff;
    color: #fff;
    font-weight: bold;
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

.offer-page-btn-link.return-home:hover {
    background-color: #0056b3;
}

/* ==================== СТИЛІ ДЛЯ КАЛЬКУЛЯТОРА ==================== */

.calculator-container {
    margin-top: 15px;
}

.calculator-group {
    margin-bottom: 20px;
}

.calculator-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #495057;
    font-size: 15px;
}

.calculator-select {
    width: 100%;
    padding: 10px 12px;
    font-size: 15px;
    border: 1px solid #ced4da;
    border-radius: 6px;
    background-color: #fff;
    color: #495057;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}

.calculator-select:hover {
    border-color: #80bdff;
}

.calculator-select:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    font-weight: normal;
    cursor: pointer;
    padding: 8px 10px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
    user-select: none;
}

.checkbox-label:hover {
    background-color: #f1f3f5;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 10px;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #007bff;
}

.calculator-result {
    margin-top: 25px;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    text-align: center;
    animation: fadeIn 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 8px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.result-price {
    font-size: 32px;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.calculator-btn {
    width: 100%;
    padding: 12px;
    margin-top: 15px;
    background-color: #6c757d;
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
}

.calculator-btn:hover {
    background-color: #5a6268;
}

.calculator-btn:active {
    transform: scale(0.98);
}

/* ==================== АДАПТИВНІСТЬ ==================== */

@media (max-width: 420px) {
    .offer-page {
        padding: 0 10px;
        margin: 20px auto;
    }

    .offer-page-h1 {
        font-size: 22px;
        margin-bottom: 25px;
    }

    .offer-page-section {
        padding: 15px 18px;
        margin-bottom: 20px;
    }

    .offer-page-section h2 {
        font-size: 18px;
        margin-bottom: 12px;
    }

    .offer-page-service-item strong {
        font-size: 15px;
    }

    .offer-page-btn-link.return-home {
        width: 100%;
        text-align: center;
        padding: 10px;
        font-size: 16px;
    }

    /* Калькулятор на мобільних */
    .calculator-group label {
        font-size: 14px;
    }

    .calculator-select {
        font-size: 14px;
        padding: 9px 10px;
    }

    .checkbox-label {
        font-size: 14px;
        padding: 6px 8px;
    }

    .checkbox-label input[type="checkbox"] {
        width: 16px;
        height: 16px;
    }

    .result-price {
        font-size: 28px;
    }

    .result-label {
        font-size: 14px;
    }

    .calculator-result {
        padding: 15px;
    }

    .calculator-btn {
        font-size: 14px;
        padding: 10px;
    }
}