.mainBanner *,
.mainBanner *:after,
.mainBanner *:before {
        box-sizing: border-box;
    }

    .mainBanner {
        --font-size: clamp(2rem, 8vmin + 1rem, 4rem);
        --line: color-mix(in lch, canvasText 15%, transparent);
        --base: 0.4;
        --accent: hsl(8 100% 55%);
        --header-height: 100vh;
        --overlay: color-mix(in lch, canvas 70%, transparent);
        color-scheme: dark only;
        height: var(--header-height);
    }

    /* Dark Theme 설정 */
    .mainBanner {
        --primary-color: rgba(35, 35, 55, 0.9);  /* 어두운 남색조 */
        --secondary-color: rgba(55, 55, 75, 0.7);  /* 조금 더 밝은 남색조 */
        --background-base: linear-gradient(135deg, var(--primary-color) 10%, var(--secondary-color) 90%),
        linear-gradient(45deg, var(--secondary-color) 10%, var(--primary-color) 90%);
    }

    .mainBanner h1 span {
        color: white;
    }

    html:not(:focus-within) {
        scroll-behavior: smooth;
    }

    .mainBanner h1 .main-msg {
        font-family: "Paperlogy", Arial, sans-serif, system-ui;
        font-weight: bolder;
    }

    :is(.mainBanner h1, .mainBanner h2) {
        font-size: clamp(2rem, 3vw + 1rem, 6rem);
    }

    .mainBanner [href='#about'] {
        position: absolute;
        bottom: 2rem;
        left: 50%;
        translate: -50% 0;
        width: 48px;
        aspect-ratio: 1;
        display: grid;
        place-items: center;
        color: canvasText;
    }
    .mainBanner [href='#about'] svg {
        width: 75%;
    }

    .mainBanner .sr-only {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
        border-width: 0;
    }

    [data-split] {
        font-size: var(--font-size);
        font-weight: 600;
    }

    section .mainBanner {
        min-height: var(--header-height);
        display: grid;
        place-items: center;
        position: relative;
        transform-origin: 50% 0%;
    }

    .mainBanner h1 {
        display: flex;
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }

    .mainBanner .sub-msg {
        padding-left: 10px;
        padding-right: 10px;
        color: #cccccc;
        font-size: 0.35em;
        margin-top: 1em;
    }


    /*logo color : #6e0e10;*/
    .mainBanner .connect-btn,
    .send-email-btn {
        font-size: 20px;
        font-family: 'Josefin Sans', sans-serif;
        width: 25%;
        min-width: 150px;
        margin: 2rem auto;
        position: relative;
        padding-top: 15px;
        padding-bottom: 15px;
        border: none;
        background-color: var(--maincolor4); /* Example background color */
        color: white;
        border-radius: 50px; /* Rounded corners */
        cursor: pointer;
        outline: none;
        overflow: hidden;
        text-align: center;
        transition: background-color 0.3s;
        text-decoration: none;
        display: inline-block;
    }

    .mainBanner .connect-btn:before,
    .send-email-btn:before {
        content: '';
        position: absolute;
        top: 0;
        left: -150px; /* Start from the left */
        width: 120px;  /* Width of the shiny effect */
        height: 100%;
        background: rgba(255, 255, 255, 0.2); /* Light white background */
        transform: skewX(-15deg);
        transition: 0.7s;
    }

    .mainBanner .connect-btn:hover:before,
    .send-email-btn:hover:before {
        animation: shine 5s infinite;
    }

    @keyframes shine {
        0% { left: -150px; }
        50% { left: 140%; }
        100% { left: -150px; }
    }

    .mainBanner .connect-btn:hover {
        background-color: var(--maincolor4); /* Darken the button a bit when hovered */
    }


    .mainBanner > section {
        position: relative;
        top: 0;
        min-height: var(--header-height);
        width: 100%;
        translate: 0 -100%;
        display: grid;
        place-items: center;
        background: var(--overlay);
    }

    .mainBanner > section::before {
        content: '';
        background: var(--overlay);
        position: absolute;
        inset: 0;
        translate: 0 100%;
    }

    .mainBanner .video {
        overflow-y: hidden;
        position: sticky;
        top: 0;
        height: var(--header-height);
        width: 100vw;
        object-fit: cover;
        background: canvas;
        mask-composite: intersect;
    }

    footer {
        text-align: center;
        padding: 2rem;
        opacity: 0.875;
    }

    .mainBanner section:not(.reader) {
        min-height: 100vh;
        display: grid;
        place-items: center;
    }

    .mainBanner .content {
        position: sticky;
        top: 0;
        min-height: 50vh;
        width: 100ch;
        padding: 2rem 0;
        max-width: calc(100% - 4rem);
        display: grid;
        place-items: center;
        margin: 0 auto;
        line-height: 1;
    }

    .content span {
        opacity: calc(var(--base) + (var(--active)));
        transition: opacity 0.5s;
    }

    .reader {
        --thick: 0px;
        outline: var(--thick) dashed var(--accent);
        outline-offset: calc(var(--thick) * -1);

        /* The trick here is that --ppc could be dynamic	*/
        height: calc(
                ((var(--ppc) * var(--content-length) + (var(--pad) * var(--buffer))) * 1px) + 50vh
        );
    }

    .logo-link {
        color: canvasText;
        position: fixed;
        top: 1rem;
        left: 1rem;
        width: 130px;
        height: 40px;
        aspect-ratio: 1;
        display: grid;
        place-items: center;
        border-radius: 6px;
        /*	background: canvas;*/
        z-index: 2;
    }

    :where(.x-link, .logo-link):is(:hover, :focus-visible) {
        opacity: 1;
    }
    .logo-link img {
        opacity: 0.8;
        width: 75%;
    }


    .mainBanner h2 span {
        color: var(--accent);
    }

    @supports (animation-timeline: scroll()) {
        @property --active {
            inherits: true;
            initial-value: 0;
            syntax: '<number>';
        }

        .reader {
            view-timeline: --reader block;
        }

        .content span {
            animation: activate both steps(1);
            animation-timeline: --reader;
            animation-range: contain calc(((var(--start, 0) * var(--ppc)) * 1px))
            contain calc(((var(--end, 0) * var(--ppc)) * 1px));
        }

        @keyframes activate {
            to {
                --active: 1;
            }
        }

        .mainBanner {
            animation: scale-down both ease-in;
            animation-timeline: view();
            animation-range: exit-crossing;
            view-timeline: --header;
        }

        @keyframes scale-down {
            to {
                scale: 0.8 0.8;
            }
        }
        body > section:last-of-type {
            view-timeline-name: --sign-off;
        }


        @keyframes draw {
            to {
                stroke-dashoffset: 0;
            }
        }
        @keyframes fill {
            to {
                fill: currentColor;
            }
        }
    }

    ::view-transition-group(root) {
        animation-duration: 1.25s;
    }
    ::view-transition-new(root),
    ::view-transition-old(root) {
        mix-blend-mode: normal;
    }

    ::view-transition-new(root) {
        animation-name: reveal-light;
    }

    ::view-transition-old(root),
    .dark::view-transition-old(root) {
        animation: none;
    }
    .dark::view-transition-new(root) {
        animation-name: reveal-dark;
    }

    @keyframes reveal-dark {
        from {
            clip-path: polygon(-30% 0, -30% 0, -15% 100%, -10% 115%);
        }
        to {
            clip-path: polygon(-30% 0, 130% 0, 115% 100%, -10% 115%);
        }
    }

    @keyframes reveal-light {
        from {
            clip-path: polygon(130% 0, 130% 0, 115% 100%, 110% 115%);
        }
        to {
            clip-path: polygon(130% 0, -30% 0, -15% 100%, 110% 115%);
        }
    }



    .mainBanner {
        --speed: 40s;
        --transition: 0.15s;
    }


    .mainBanner main {
        overflow-x: hidden;
    }



    .mainBanner article {
        /*padding: 2rem;*/
        margin: 0 auto;
        width: 200vw;
        height: 100%;
        box-shadow: 0 10px 20px -5px hsl(0 0% 50% / 0.5);
        /*border: 1px solid hsl(0 0% 90%);*/
        border-radius: 6px;
        /*background: hsl(0 0% 100%);*/
        resize: horizontal;
        overflow: hidden;
        /*max-width: min(calc(600px + 8rem), calc(100vw - 2rem));*/
        min-width: 340px;
        container-type: inline-size;
        transition: background-color 0.25s, color 0.25s, border 0.25s, box-shadow 0.25s;
    }

    .mainBanner article a:is(:hover, :focus-visible) {
        background-position: 100% 0;
    }

    /*	border: 2px solid red;*/
    .mainBanner .window {
        /*height: 250px;*/
        container-type: inline-size;
        transform-style: preserve-3d;
        width: 100%;
        outline: 4px dashed transparent;
        transition: outline 0.5s;
    }

    .mainBanner ul.grid {
        left: -55%;
        top: -60%;
    }
    .mainBanner .scene {
        position: relative;
        height: 100%;
        width: 100%;
    }

    .mainBanner:has(#overflow:checked) .scene {
        mask: unset;
    }
    .mainBanner:has(#overflow:checked) .window {
        outline: 4px dashed #db2777;
    }
    .mainBanner:has(#overflow:checked) .header {
        opacity: 0.2;
    }

    .mainBanner .grid {
        --count: 6; /* The number of items you have */
        --inset: 0; /* Controls the grid animation offset on entry/exit */
        --outset: 0;
        height: 100%;
        width: 100%;
        margin: 0;
        list-style-type: none;
        position: relative;
        display: grid;
        padding: 0 1rem;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0 2rem;
        transition: transform 0.5s;
        /*	3D translation */
        transform:
                rotateX(calc(var(--rotate, 0) * 20deg))
                rotateZ(calc(var(--rotate, 0) * -20deg))
                skewX(calc(var(--rotate, 0) * 20deg));
    }

    .mainBanner .grid {
        --rotate: 0.8;
    }

    .mainBanner li {
        min-height: 600px;
        transform-style: preserve-3d;
        width: 100%;
        z-index: calc(1 + var(--active));
    }
    .mainBanner li::before {
        content: "";
        position: absolute;
        inset: 4px 4px -2px -2px;
        border-radius: 6px;
        background: hsl(0 0% 0% / 0.1);
        filter: blur(calc(var(--active, 0) * 8px));
        z-index: -1;
        transition: scale var(--transition), opacity var(--transition), translate var(--transition), filter var(--transition);
        transform-origin: 50% 0;
        scale: 1 calc(1 + (var(--active, 0) * 0.05));
        --tw-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
        box-shadow: 0 0 #0000, 0 0 #0000, var(--tw-shadow);
    }

    .mainBanner .grid:hover li {
        animation-play-state: paused;
    }

    .mainBanner .grid {
        transform-style: preserve-3d;
        gap: 1rem;
    }

    .mainBanner .item {
        /*background-repeat: no-repeat;*/
        background-size: cover;
        align-items: center;
        background: hsl(0 0% 100%);
        border: 1px solid hsl(0 0% 90%);
        color: hsl(0 0% 10%);
        border-radius: 6px;
        cursor: pointer;
        display: flex;
        gap: 1rem;
        height: 100%;
        justify-content: start;
        overflow: hidden;
        padding: 1.25rem;
        text-align: center;
        width: 100%;
        transition: transform var(--transition), scale var(--transition), background-color 0.25s, color 0.25s, border 0.25s, box-shadow 0.25s;;
        scale: calc(1 + (var(--active, 0) * 0.05));
        transform: translate3d(0, 0, calc(var(--active, 0) * 24px));
    }

    .mainBanner li:nth-of-type(1) { --index: 0; }
    .mainBanner li:nth-of-type(2) { --index: 0; }
    .mainBanner li:nth-of-type(3) { --index: 1; }
    .mainBanner li:nth-of-type(4) { --index: 1; }
    .mainBanner li:nth-of-type(5) { --index: 2; }
    .mainBanner li:nth-of-type(6) { --index: 2; }
    .mainBanner li:nth-of-type(7) { --index: 3; }
    .mainBanner li:nth-of-type(8) { --index: 3; }
    .mainBanner li:nth-of-type(9) { --index: 4; }
    .mainBanner li:nth-of-type(10) { --index: 4; }
    .mainBanner li:nth-of-type(11) { --index: 5; }
    .mainBanner li:nth-of-type(12) { --index: 5; }

    @container (width < 400px) {
        .mainBanner .header {
            grid-template: auto 1fr / 1fr;
        }
        .mainBanner .header a {
            justify-self: start;
        }
        .mainBanner .grid {
            --count: 12;
            --inset: 0;
            --outset: 3;
            grid-template-columns: 1fr;
        }

        .mainBanner li:nth-of-type(1) { --index: 0; }
        .mainBanner li:nth-of-type(2) { --index: 1; }
        .mainBanner li:nth-of-type(3) { --index: 2; }
        .mainBanner li:nth-of-type(4) { --index: 3; }
        .mainBanner li:nth-of-type(5) { --index: 4; }
        .mainBanner li:nth-of-type(6) { --index: 5; }
        .mainBanner li:nth-of-type(7) { --index: 6; }
        .mainBanner li:nth-of-type(8) { --index: 7; }
        .mainBanner li:nth-of-type(9) { --index: 8; }
        .mainBanner li:nth-of-type(10) { --index: 9; }
        .mainBanner li:nth-of-type(11) { --index: 10; }
        .mainBanner li:nth-of-type(12) { --index: 11; }

        .mainBanner li {
            --duration: calc(var(--speed) * 2);
            --delay: calc((var(--duration) / var(--count)) * (var(--index, 0) - 8));
        }
    }

    @media(prefers-reduced-motion: no-preference) {
        .mainBanner .grid {
            /*gap: 0 9rem;*/
        }

        .mainBanner li {
            --duration: calc(var(--speed) * 1);
            --delay: calc((var(--duration) / var(--count)) * (var(--index, 0) - 8));
            animation: slide var(--duration) var(--delay) infinite linear;
            translate: 0% calc(((var(--count) - var(--index)) + var(--inset, 0)) * 100%);
        }
        .mainBanner li:hover {
            --active: 1;
        }
        @keyframes slide {
            100% {
                translate: 0% calc(calc((var(--index) + var(--outset, 0)) * -100%));
            }
        }
        @container (width < 400px) {
            .mainBanner li {
                --duration: calc(var(--speed) * 2);
                --delay: calc((var(--duration) / var(--count)) * (var(--index, 0) - 8));
            }
        }
    }