main .feature-demo-container {
    display: flex;
    flex: 1;
    gap: var(--margin);
    
    & article .view-demo
    {
        display: none;

        @media (width <=850px) {
            display: block;
            margin-top: var(--p-margin);
            scale: .9;
            transform-origin: left top;
        }
    }

    & .feature-navigation-container {
        display: flex;
        flex-direction: column;
        gap: var(--margin);
        padding-block: var(--margin);
        flex: 1 1 350px;
        transition: opacity .5s;

        & h3:first-child {
			margin-block-start: 0;
		}

        @media (width > 850px) {
            margin-inline: var(--margin);
        }

        @media (width <= 850px) {
            opacity: 1;

            .full-screen & {
                opacity: .1;
            }
        }

        & .feature-navigation{
            & section {
                --animation-speed: .15s;
                display: flex;
                flex-direction: column;
                gap: var(--half-margin);

                & article {
                    outline-color: var(--white);
                    position: relative;
                    padding-top: 0;
                    transition: padding var(--animation-speed) ease-out;

                    &:before {
                        content: '';
                        position: absolute;
                        display: block;
                        inset: -10px -10px -10px -20px;
                        opacity: 0;
                        background: var(--white);
                        transition: opacity var(--animation-speed) ease-out;
                        z-index: -1;
                        border-radius: 10px;
                    }

                    & a {
                        text-decoration: none;
                        border-bottom: var(--border-bottom-1);
                        font-weight: var(--bold);

                        &:visited::before {
                            content: '✓ ';
                        }
                    }

                    & .about-feature {
                        display: grid;
                        grid-template-rows: 0fr;
                        transition: grid-template-rows 0.25s ease-out;

                        & .text-container {
                            overflow: hidden;

                            & .text-content
                            {
                                margin: var(--half-margin);
                                font-weight: 500;
                            }
                        }
                    }

                    &.open {
                        padding-top: var(--quarter-margin);

                        &:before {
                            opacity: 1;
                            margin: 5px 0;
                        }

                        & .about-feature {
                            grid-template-rows: 1fr;
                        }
                    }
                }

                & :is(article a:is(:hover, :active), article.current a)[data-demopath] {
                    background: yellow;
                    outline: solid 5px yellow;
                    color: black !important;
                }
            }   
        }
    }

    & .preview-note-container {
        --width: var(--line-height);
        display: flex;
        justify-content: space-between;
        align-items: center;
        position: absolute;
        left: calc(0px - var(--width));
        width: var(--width);
        top: 0;
        bottom: 0;
 
        & .close-view-demo
        {
            display: none;

            @media (width <= 850px) {
                display: flex;
                align-items: center;
                justify-content:center;
                aspect-ratio: 1;
                width: auto;
                border: none;
                border-radius: 50%;
                background: transparent;
                line-height: 80%;

                &::before {
                    margin: 0;
                    font-size: 250%;
                    color: var(--_color);
                }

                &:hover,
                &:focus {
                    background: color-mix(in srgb, var(--black) 90%, var(--white));
                }

                &:active {
                    background: color-mix(in srgb, var(--black) 80%, var(--white));
                }
            }
        }

        & .preview-note {
	        writing-mode: vertical-rl;
	        rotate: 180deg;
	        scale: .95;
        }
    }

    & .demo-view {
	    flex: 10 1 400px;
	    display: flex;
	    flex-direction: column;
	    justify-content: start;
	    align-items: center;
	    background: #f0f0f0;
	    position: relative;
	    height: clamp(60vh, 700px, 80vh);
	    display: flex;
	    width: auto;
	    height: auto;
	    flex-direction: column;	
        background-color: var(--bg);

	    @media (width > 850px){
		    position: sticky;
		    top: calc(var(--margin) / 2);
		    height: calc(100dvh - var(--min-header-height) - var(--header-border-width) - var(--margin) - 50px);
            min-height: 350px;
	    }

	    @media (width <= 850px) {
		    transform: translateX(calc(-100% - 5px));
		    transition: transform .5s, opacity .1s;
		    display: flex;
		    position: fixed;
		    pointer-events: none;
		    inset: 0;

            .full-screen & {
                pointer-events: unset;
                transform: translateX(0);
            }

		    .preview-note-container {
			    --_color: color-mix(in srgb, var(--c3) 70%, var(--white));
			    position: static;
			    width: auto;
			    padding: var(--half-margin);
			    align-self: stretch;
			    gap: var(--margin);
			    background: var(--black);
			    color: var(--_color);
			    box-shadow: 0 3px 5px #000;
			    z-index: 1;

			    .preview-note {
				    writing-mode: unset;
				    rotate: unset;
				    font-size: unset;
				    text-wrap: pretty;
			    }
		    }
	    }

        & .section-title {
            background: var(--border-color);
            display: flex;
            padding: var(--half-margin) var(--margin);
            align-items: center;
            justify-content: center;
        }

        & .iframe-container {
            display: grid;
            grid-template-areas: 'stack';
            position: relative;
            width: 100%;
            height: 100%;
            background: var(--bg);
            overflow: hidden;

            @media (width > 850px) {
                box-shadow: inset 0px 0px 6px color-mix(in srgb, var(--black) 30%, var(--white));
                padding: 5px;
                border-radius: 3px;
            }

            & iframe
            {
                opacity: 1;
                transition: opacity .5s ease;
                width: 100%;
                height: 100%;
                min-height: min(100vh, 400px);
                display: block;
                grid-area: stack;
                overflow: hidden;
                border: none;
                background-color: white;
            }

            & iframe:not(.current) {
                display: none;
            }

            &:not(:has(iframe)) {
                place-content: center;
            }

                &:not(:has(iframe)):before {
                    content: 'Select an article to continue...';
                    color: var(--text-color);
                    font-weight: 500;
                    font-size: 1.2rem;
                }

            &.loading {
               background: color-mix(in srgb, var(--black) 10%, var(--white));

                & iframe {
                    opacity: .1;
                }
            }
        }
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}