.gulf-spectrum {
    padding: 150px 20px 80px;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.popup-content {
  max-width: 90%;
  max-height: 80vh;
  transition: transform 0.2s ease;
  touch-action: none; /* required for pinch on mobile */
}




.gulf-spectrum::before,
.gulf-spectrum::after {
    content: "";
    position: absolute;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.25;
    background: var(--color-primary);
    animation: floatGlow 12s infinite ease-in-out alternate;
}

.gulf-spectrum::before {
    top: -50px;
    left: -80px;
}

.gulf-spectrum::after {
    bottom: -50px;
    right: -80px;
}

@keyframes floatGlow {
    from { transform: translateY(0) scale(1); }
    to { transform: translateY(40px) scale(1.15); }
}

.gulf-spectum-container {
    width: 90%;
    max-width: 1400px;
    margin: auto;
}


.gulf-spectrum-header h2 {
    text-align: center;
    font-size: 38px;
    margin-bottom: 40px;
    color: var(--color-text);
    position: relative;
}

.gulf-spectrum-header h2::after {
    content: "";
    width: 80px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 10px;
    position: absolute;
    left: 50%;
    bottom: -12px;
    transform: translateX(-50%);
}



.gulf-spectrum-categories {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.gulf-spectrum-categories button {
    padding: 10px 22px;
    font-size: 15px;
    border-radius: 30px;
    border: 1px solid var(--color-primary);
    background: var(--color-bg-alt);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--animation-smooth);
    backdrop-filter: blur(6px);
}

.gulf-spectrum-categories button:hover,
.gulf-spectrum-categories button.active {
    background: var(--color-primary);
    color: var(--color-bg);
}



.gulf-spectrum-images {
    position: relative;
}

.single-spectrum-image {
    display: none;
    gap: 40px;
    background: var(--color-bg-alt);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-strong);
    align-items: center;
    transition: all var(--animation-smooth);
}

.single-spectrum-image.active {
    display: flex;
    animation: fadeSlide 0.7s ease forwards;
}

@keyframes fadeSlide {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}


.image-gulf {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
}

.image-gulf img {
    width: 50%;
    height: 50%;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}


.image-gulf img:hover {
    transform: scale(1.03);
}


.gulf-spectrum-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.gulf-spectrum-info h3 {
    color: var(--color-primary);
    font-size: 26px;
}

.gulf-spectrum-info p {
    color: var(--color-text);
    font-size: 16px;
    line-height: 1.6;
}


.view-image a {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 22px;
    background: var(--color-primary);
    color: white;
    border-radius: 30px;
    transition: all var(--animation-smooth);
}

.view-image a:hover {
    transform: translateY(-3px);
    opacity: .9;
}





.popup {
    display: none;
    position: fixed;
    z-index: 999999;
    left: 0; top: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.75);
    backdrop-filter: blur(8px);
}

.popup-content {
    display: block;
    max-width: 80%;
    max-height: 80%;
    margin: 5% auto;
    border-radius: 10px;
    box-shadow: var(--shadow-strong);
}

.popup-close {
    position: absolute;
    top: 30px;
    right: 40px;
    font-size: 40px;
    color: var(--color-bg);
    cursor: pointer;
    transition: .2s;
}

.popup-close:hover {
    opacity: 0.6;
}


.popup-download {
    position: absolute;
    top: 30px;
    right: 100px;
    background: var(--color-primary);
    padding: 10px 14px;
    border-radius: 50%;
    color: var(--color-bg);
    font-size: 18px;
    transition: .3s;
}

.popup-download:hover {
    transform: scale(1.08);
}


@media (max-width: 850px) {
    .single-spectrum-image {
        flex-direction: column;
        padding: 25px;
    }

    .image-gulf img {
        max-height: 260px;
    }
}