.bgm-roi-card {
    background: #ffffff;
    border: 1px solid #e1e1e1;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 7px 30px rgba(0,0,0,0.015);
    font-family: 'Inter', sans-serif;
    max-width: 720px;
    margin: 0px;
}
.bgm-roi-card h3 {
    color: #1a1a1a;
    font-size: 20px;
    margin-bottom: 20px;
    border-bottom: 2px solid #ff6600; /* BGM Vurgu Rengi */
    padding-bottom: 10px;
}
.bgm-field-group {
    margin-bottom: 15px;
}
.bgm-field-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
    font-size: 14px;
}
.bgm-field-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    outline: none;
}
.bgm-calc-btn {
    background: #1a1a1a;
    color: #fff;
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
}
.bgm-calc-btn:hover {
    background: #ff6600;
}
.bgm-result-box {
    margin-top: 20px;
    background: #f9f9f9;
    padding: 15px;
    border-radius: 8px;
    display: none;
}
.bg-res-val {
    font-size: 24px;
    color: #ff6600;
    font-weight: 800;
    display: block;
}