body {
    font-family: 'Inter', sans-serif;
    background-color: #F4F7F9;
    color: #333;
}

.header {
    background: linear-gradient(135deg, #4A90E2 0%, #50E3C2 100%);
    color: white;
    padding: 2rem 0;
    margin-bottom: 2rem;
    text-align: center;
}

.header h1 {
    font-weight: 700;
    font-size: 2.5rem;
}

.card {
    border: none;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    padding: 2rem;
    height: 100%;
}

.card-title {
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #4A90E2;
    display: flex;
    align-items: center;
}

.card-title i {
    margin-right: 0.75rem;
}

.form-label {
    font-weight: 500;
}

.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #ced4da;
    padding: 0.75rem 1rem;
}
.form-control:focus {
    border-color: #4A90E2;
    box-shadow: 0 0 0 0.25rem rgba(74, 144, 226, 0.25);
}

.btn-primary {
    background-color: #4A90E2;
    border-color: #4A90E2;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: background-color 0.2s ease-in-out;
}

.btn-primary:hover {
    background-color: #357ABD;
    border-color: #357ABD;
}

.results-card h3 {
    text-align: center;
    color: #aaa;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid #eee;
}
.result-item:last-child {
    border-bottom: none;
}
.result-item span {
    font-weight: 500;
}
.result-item .value {
    font-weight: 700;
    color: #4A90E2;
    font-size: 1.1rem;
}

.total-value {
    background-color: #4A90E2;
    color: white;
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
}
.total-value .result-item .value {
    color: white;
    font-size: 1.5rem;
}