body {
    background-color: #f0f2f5;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.calculator-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    max-width: 500px;
    width: 100%;
    margin: 0 auto;
}

@media (max-width: 576px) {
    .calculator-card {
        padding: 25px;
        border-radius: 15px;
    }
    .card-title {
        font-size: 1.5rem;
    }
    .result-score {
        font-size: 2.5rem;
    }
    .btn-calculate {
        padding: 10px 25px;
        font-size: 1rem;
    }
}

.card-title {
    color: #667eea;
    font-weight: bold;
    text-align: center;
    margin-bottom: 30px;
}

.form-label {
    font-weight: 500;
    color: #555;
}

.form-control {
    border-radius: 10px;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    transition: all 0.3s;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.btn-calculate {
    background-color: #667eea;
    border: none;
    border-radius: 10px;
    padding: 12px 30px;
    font-weight: 600;
}

.btn-calculate:hover {
    background-color: #5568d3;
}

.result-box {
    background-color: #f5576c;
    color: white;
    border-radius: 15px;
    padding: 25px;
    text-align: center;
    margin-top: 25px;
    display: none;
}

.result-box.show {
    display: block;
    animation: fadeIn 0.5s;
}

.result-score {
    font-size: 3rem;
    font-weight: bold;
    margin: 10px 0;
}

.converter-section {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 25px;
    margin-top: 30px;
}

.converter-title {
    color: #667eea;
    font-weight: bold;
    margin-bottom: 15px;
}

.btn-convert {
    background: #667eea;
    border: none;
    border-radius: 10px;
    padding: 8px 20px;
    font-weight: 500;
}

.btn-convert:hover {
    background: #5568d3;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}