.theme-options-viewport {
    position: relative;
    overflow: hidden;
}

.theme-options-glass {
    padding: 20px 28px 30px;
    scroll-behavior: smooth;
}

.theme-scroll-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 56px;
    border: 0;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.8);
    color: rgba(15, 23, 42, 0.82);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.1);
    backdrop-filter: blur(12px);
    cursor: pointer;
    transition:
        opacity 0.2s ease,
        transform 0.2s ease,
        background-color 0.2s ease,
        color 0.2s ease;
    z-index: 3;
}

.theme-scroll-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.94);
    color: #0f172a;
    transform: translateY(-50%) scale(1.03);
}

.theme-scroll-btn:disabled {
    opacity: 0.26;
    cursor: default;
    transform: translateY(-50%);
}

.theme-scroll-btn[hidden] {
    display: none;
}

.theme-scroll-btn__glyph {
    width: 9px;
    height: 9px;
    border-top: 1.5px solid currentColor;
    border-right: 1.5px solid currentColor;
    pointer-events: none;
}

.theme-scroll-btn-prev .theme-scroll-btn__glyph {
    transform: rotate(-135deg);
}

.theme-scroll-btn-next .theme-scroll-btn__glyph {
    transform: rotate(45deg);
}

.theme-scroll-btn-prev {
    left: 17px;
}

.theme-scroll-btn-next {
    right: 17px;
}

@media (max-width: 640px) {
    .theme-options-viewport {
        padding: 20px 12px;
    }

    .theme-options-glass {
        gap: 16px;
        padding: 16px 20px 24px;
    }

    .theme-scroll-btn {
        width: 16px;
        height: 48px;
    }

    .theme-scroll-btn-prev {
        left: 11px;
    }

    .theme-scroll-btn-next {
        right: 11px;
    }

    .theme-card {
        width: min(250px, calc(100vw - 88px));
    }
}