.page-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 15px;
}

.detail-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 35px;
    align-items: start;
}

@media(max-width:992px) {
    .detail-layout {
        grid-template-columns: 1fr;
    }
}

.hero-image {
    position: relative;
    height: 520px;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: var(--shadow);
    background: #000;
}

    .hero-image::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: var(--bg-img);
        background-size: cover;
        background-position: center;
        transform: scale(1.15);
        filter: blur(18px) brightness(0.95);
        opacity: 0.95;
    }

    .hero-image::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg,rgba(0,0,0,0.1),rgba(0,0,0,0.4));
    }

.hero-main {
    position: absolute;
    inset: 0;
    z-index: 2;
}

    .hero-main img {
        max-width: 320px;
        border-radius: 14px;
        box-shadow: 0 15px 40px rgba(0,0,0,.3);
    }

.hero-label {
    position: absolute;
    bottom: 15px;
    left: 15px;
    z-index: 3;
}

.btn-gradient {
    background: linear-gradient(135deg,var(--primary-start),var(--primary-end));
    color: #fff;
    border: none;
}

    .btn-gradient:hover {
        opacity: .9;
    }

.amount-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.amount-item {
    flex: 1 1 calc(33.33% - 10px);
}

.amount-btn {
    width: 100%;
    border-radius: 14px;
    font-weight: 600;
}

    .amount-btn.active {
        background: linear-gradient(135deg,var(--primary-start),var(--primary-end));
        color: #fff;
        border-color: transparent;
        transform: scale(1.03);
    }

.custom-box {
    margin-top: 10px;
}