.cable-calculator-widget {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 1000px;
    margin: 20px auto;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.calculator-header {
    background: #2c3e50;
    color: #fff;
    padding: 20px;
    text-align: center;
}

.calculator-header h3 {
    margin-bottom: 10px;
    font-weight: 600;
}

.calculator-header p {
    opacity: 0.8;
    font-size: 0.95rem;
}

.calculator-body {
    display: flex;
    flex-wrap: wrap;
}

.input-section {
    flex: 1;
    min-width: 300px;
    padding: 20px;
    border-right: 1px solid #ddd;
}

.results-section {
    flex: 1;
    min-width: 300px;
    padding: 20px;
    background: #f9f9f9;
}

.section-title {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #3498db;
    color: #2c3e50;
    font-weight: 600;
}

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

.input-group h5 {
    margin-bottom: 10px;
    color: #3498db;
    font-size: 1rem;
}

.input-row {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    padding: 8px 10px;
    background: #fff;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.input-row:hover {
    background: #f0f7ff;
}

.input-row label {
    flex: 1;
    margin-right: 10px;
    font-weight: normal;
    font-size: 0.9rem;
}

.input-row label strong {
    font-weight: 600;
}

.input-row input, .input-row select {
    width: 120px;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
}

.input-row span {
    width: 40px;
    text-align: right;
    margin-left: 5px;
    font-weight: 500;
    font-size: 0.9rem;
}

.btn-calculate {
    display: block;
    width: 100%;
    padding: 12px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    margin: 20px 0;
    transition: background 0.3s ease;
}

.btn-calculate:hover {
    background: #2980b9;
}

.btn-calculate:disabled {
    background: #95a5a6;
    cursor: not-allowed;
}

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

.result-group h5 {
    margin-bottom: 10px;
    color: #3498db;
    font-size: 1rem;
}

.result-row {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    padding: 8px 10px;
    background: #e8f4fc;
    border-radius: 5px;
}

.result-row label {
    flex: 1;
    margin-right: 10px;
    font-size: 0.9rem;
}

.result-row label strong {
    font-weight: 600;
}

.result-row span {
    width: 100px;
    text-align: right;
    font-weight: 600;
    font-size: 0.9rem;
}

.result-row .unit {
    width: 40px;
    text-align: right;
    margin-left: 5px;
    font-weight: 500;
    font-size: 0.9rem;
}

.loading {
    text-align: center;
    padding: 10px;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: #3498db;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.calculator-message {
    padding: 10px;
    border-radius: 5px;
    margin: 10px 0;
}

.error-message {
    color: #e74c3c;
    background: #fadbd8;
}

.success-message {
    color: #27ae60;
    background: #d5f4e6;
}

@media (max-width: 768px) {
    .calculator-body {
        flex-direction: column;
    }
    
    .input-section {
        border-right: none;
        border-bottom: 1px solid #ddd;
    }
}