#sv-calc-box {
    max-width: 400px;
    margin: 40px auto;
    padding: 30px;
    background-color: #ffffff;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    border: 1px solid #e0e0e0;
    font-family: sans-serif;
}
.brand-header { text-align: center; color: #333; margin-bottom: 20px; font-size: 1.3rem; }
.gold-price-bar { background-color: #f8f9fa; padding: 12px; border-radius: 8px; text-align: center; font-weight: 600; color: #555; margin-bottom: 25px; border-left: 4px solid #b8860b; }
input, select { width: 100%; padding: 12px; margin-bottom: 20px; border: 1px solid #ccc; border-radius: 6px; box-sizing: border-box; }
button { width: 100%; padding: 15px; background-color: #b8860b; color: white; border: none; border-radius: 6px; font-size: 16px; font-weight: bold; cursor: pointer; }
button:hover { background-color: #966d09; }
#result { margin-top: 25px; padding-top: 20px; border-top: 2px solid #eee; text-align: center; }