.fuel-calculator-container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    font-family: Arial, sans-serif;
}

.input-row {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 500;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

input, .styled-select {
    width: 100%;
    padding: 12px;
    border: 2px solid #145AE2;
    border-radius: 6px;
    font-size: 1rem;
    background: #f8f8f8;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.styled-select {
    appearance: none;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="%23145AE2" d="M7 10l5 5 5-5z"/></svg>') no-repeat right 10px center/15px auto;
}

.calculate-button {
    background: #145AE2;
    color: white;
    padding: 15px 25px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    width: 100%;
    transition: all 0.3s;
}

.calculate-button:hover {
    background: #1147b5;
}

.result-summary {
    margin-top: 2rem;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 8px;
    border: 2px solid #ddd;
    display: none;
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin: 1rem 0;
    font-size: 1.1rem;
}

.result-value {
    color: #145AE2;
    font-weight: bold;
}

.save-btn {
    background: none;
    border: none;
    color: #145AE2;
    cursor: pointer;
    margin-left: 15px;
    font-size: 1.4em;
    padding: 0;
    line-height: 1;
}

.save-btn:hover {
    transform: scale(1.1);
}

.save-button {
    background: #145AE2;
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 1.5rem;
    width: 100%;
}

@media (max-width: 480px) {
    .fuel-calculator-container {
        padding: 1rem;
        margin: 1rem;
    }
    
    .input-group {
        flex-direction: column;
    }
}

@media print {
    .calculator-form, .save-button, .save-btn {
        display: none !important;
    }
    
    .result-summary {
        display: block !important;
        border: none;
        box-shadow: none;
    }
}