.cashback-banner {
    max-width: 900px;
    margin: 40px auto 0 auto;
    border-radius: 18px 18px 0 0;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0,0,0,0.18);
    display: block;
}
.cashback-banner img {
    width: 100%;
    display: block;
    border-radius: 18px 18px 0 0;
}
.cashback-main-container {
    max-width: 900px;
    margin: 0 auto 40px auto;
    background: #23272f;
    border-radius: 0 0 18px 18px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.18);
    padding: 32px 28px 28px 28px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.cashback-title {
    font-size: 1.25em;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
    text-align: center;
}
.cashback-form-input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid #bbb;
    font-size: 1.1em;
    margin-bottom: 16px;
    background: #181a20;
    color: #fff;
}
.cashback-form-input:focus {
    outline: 2px solid #4caf50;
    border-color: #4caf50;
}
.cashback-btn {
    width: 100%;
    padding: 12px 0;
    background: linear-gradient(90deg, #4caf50 60%, #388e3c 100%);
    color: #fff;
    font-size: 1.15em;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(76,175,80,0.12);
    cursor: pointer;
    transition: background 0.2s;
    margin-bottom: 10px;
}
.cashback-btn:hover {
    background: linear-gradient(90deg, #388e3c 60%, #4caf50 100%);
}
.cashback-result {
    margin-top: 22px;
    font-size: 1.15em;
    min-height: 32px;
    text-align: center;
}
@media (max-width: 900px) {
    .cashback-banner, .cashback-main-container {
        max-width: 98vw;
    }
}
@media (max-width: 600px) {
    .cashback-main-container {
        padding: 18px 6vw 18px 6vw;
    }
}