/* =========================================
   HERO
========================================= */
.hero-logo__image {
    animation: LOGOANIM 4.0s ease-in-out infinite;
    position: absolute;
    top: 6%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: none;

    color: #ffffff;

    font-size: clamp(64px, 15vw, 120px);
    font-weight: 300;
    letter-spacing: 0.08em;
    line-height: 1;

    text-shadow:
        0 0 4px rgba(255, 255, 255, 0.9),
        0 0 10px rgba(100, 200, 255, 0.8),
        0 0 20px rgba(0, 150, 255, 0.65),
        0 0 40px rgba(0, 100, 255, 0.4);
}

.hero {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    color: #ffffff;
    z-index: 10;
    overflow: hidden;
}


/* =========================================
   HERO COPY
========================================= */

.hero-copy {
    position: absolute;

    top: 50%;
    left: 50%;

    transform:
        translate(-50%, -50%);

    width: min(1100px,
            calc(100% - 100px));

    text-align: center;
}

.hero-copy::before {
    content: "";

    position: absolute;
    inset: -100px;

    z-index: -1;

    background:
        radial-gradient(ellipse at center,
            rgba(0, 0, 0, 0.5) 0%,
            rgba(0, 0, 0, 0.3) 40%,
            rgba(0, 0, 0, 0.1) 65%,
            rgba(0, 0, 0, 0) 80%);

    filter: blur(15px);

    pointer-events: none;
}

/* =========================================
   巨大英字
========================================= */

.hero-copy__en {
    position: absolute;

    top: 50%;
    left: 50%;

    transform:
        translate(-50%, -50%);

    /* これ重要 */
    width: max-content;

    margin: 0;

    text-align: center;
    white-space: nowrap;

    font-size: clamp(40px,
            7vw,
            130px);

    font-weight: 300;
    letter-spacing: -0.06em;

    opacity: 0.12;

    pointer-events: none;
    user-select: none;
}

/* =========================================
   説明
========================================= */

.hero-copy__description {
    position: absolute;
    top: 180px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    margin: 0;
    margin:
        28px 0 0;
    font-size: larger;
    font-weight: 400;
    line-height: 2;
    letter-spacing: 0.12em;
    color: #ffffff;
    opacity: 0.65;

    text-decoration: underline;
    text-decoration-color: white;
}

.hero-copy__description:hover {
    color: #ffffff;
    opacity: 1;

    text-shadow:
        0 0 12px rgba(158, 220, 255, 0.45);
}

/* =========================================
   MODEL NAVIGATION
========================================= */

.model-navigation {
    position: absolute;

    top: 50%;
    left: 50%;

    transform:
        translate(-50%, -50%);

    width: min(900px,
            85vw);

    display: flex;

    align-items: center;
    justify-content: space-between;

    z-index: 20;

    pointer-events: none;
}


/* =========================================
   MODEL BUTTON
========================================= */

.model-navigation__button {
    position: relative;

    width: 80px;
    height: 120px;

    display: flex;

    justify-content: center;
    align-items: center;

    padding: 0;

    border: none;

    background: transparent;

    cursor: pointer;

    pointer-events: auto;

    opacity: 0.65;

    transition:
        opacity 0.3s ease,
        transform 0.3s ease;
}

.model-navigation__button:hover {
    opacity: 1;

    transform:
        scale(1.08);
}


/* =========================================
   ARROW
========================================= */

.arrow {
    display: block;

    width: 35px;
    height: 75px;

    transition:
        transform 0.3s ease;
}


/* 左 */

.arrow--left,
.arrow--right {
    position: relative;

    width: 32px;
    height: 80px;

    opacity: 0.8;
}


/* 左 */

.arrow--left {
    border-left:
        2px solid rgba(255, 255, 255, 0.8);

    border-radius:
        50% 0 0 50%;

    animation:
        swipeLeft 1.8s ease-in-out infinite;
}


/* 右 */

.arrow--right {
    border-right:
        2px solid rgba(255, 255, 255, 0.8);

    border-radius:
        0 50% 50% 0;

    animation:
        swipeRight 1.8s ease-in-out infinite;
}


/* 矢印 */

.arrow--left::after,
.arrow--right::after {
    position: absolute;

    top: 50%;

    font-size: 20px;
    font-weight: 200;

    color: rgba(255, 255, 255, 0.9);

    transform:
        translateY(-50%);
}


.arrow--left::after {
    content: "‹";
    left: 7px;
}


.arrow--right::after {
    content: "›";
    right: 7px;
}


@keyframes swipeLeft {

    0%,
    100% {
        transform: translateX(0);
        opacity: 0.4;
    }

    50% {
        transform: translateX(-6px);
        opacity: 1;
    }
}


@keyframes swipeRight {

    0%,
    100% {
        transform: translateX(0);
        opacity: 0.4;
    }

    50% {
        transform: translateX(6px);
        opacity: 1;
    }
}


.model-navigation__button:hover .arrow--left {

    transform:
        translateX(-5px);
}


.model-navigation__button:hover .arrow--right {

    transform:
        translateX(5px);
}


/* =========================================
   BOTTOM
========================================= */

.hero-bottom {
    position: absolute;

    left: 48px;
    right: 48px;

    bottom: 32px;

    display: flex;

    justify-content: space-between;
    align-items: center;

    font-size: 10px;

    font-weight: 500;

    letter-spacing: 0.16em;

    opacity: 0.5;
}


/* =========================================
   TABLET
========================================= */

@media (max-width: 900px) {
    .hero-logo__image {
        display: block;
    }

    .hero-company {
        top: 28px;
        left: 28px;
    }

    .hero-copy {
        width:
            calc(100% - 60px);
    }

    .model-navigation {
        width: 90vw;
    }

    .hero-bottom {
        left: 28px;
        right: 28px;
    }
}


/* =========================================
   MOBILE
========================================= */

@media (max-width: 600px) {

    .hero-company {
        top: 20px;
        left: 20px;
    }

    .hero-company__name {
        font-size: 18px;
    }

    .hero-company__sub {
        font-size: 9px;
    }


    /* -------------------------------
       Copy
    -------------------------------- */

    .hero-copy {
        width:
            calc(100% - 40px);
    }

    .hero-copy__en {
        font-size: 18vw;

        line-height: 0.9;

        white-space: normal;
    }

    .hero-copy__title {
        font-size: 10vw;
    }

    .hero-copy__description {
        margin-top: 20px;

        font-size: 11px;

        line-height: 1.8;
    }


    /* -------------------------------
       Navigation
    -------------------------------- */

    .model-navigation {
        width:
            calc(100% - 20px);
    }

    .model-navigation__button {
        width: 50px;
        height: 90px;
    }

    .arrow {
        width: 25px;
        height: 55px;
    }


    /* -------------------------------
       Bottom
    -------------------------------- */

    .hero-bottom {
        left: 20px;
        right: 20px;

        bottom: 20px;

        font-size: 8px;
    }
}


.model-pagination {
    position: absolute;

    left: 50%;
    bottom: 70px;

    display: flex;
    align-items: center;
    gap: 8px;

    transform: translateX(-50%);

    z-index: 10;
}

.model-pagination__dot {
    width: 5px;
    height: 5px;

    border-radius: 50%;

    background:
        rgba(255, 255, 255, 0.35);

    transition:
        width 0.3s ease,
        background 0.3s ease;
}

.model-pagination__dot.active {
    width: 20px;

    border-radius: 10px;

    background: rgba(255, 255, 255, 0.95);
}


.scroll-guide {
    display: flex;
    align-items: center;
    gap: 16px;

    color: #fff;
}



.scroll-guide__text {
    font-size: 10px;
    letter-spacing: 0.25em;

    opacity: 0.65;
}


.hero-bottom {
    position: absolute;

    left: 0;
    right: 0;
    bottom: 30px;

    padding: 0 40px;
}


/* 左下 */

.hero-company {
    position: absolute;

    left: 40px;
    bottom: 0;
}


/* 画面下中央 */

.scroll-guide {
    position: absolute;

    left: 50%;
    bottom: 0;

    transform: translateX(-50%);
}


.scroll-guide__button {
    position: relative;
    width: 25px;
    height: 25px;

    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;
}

.scroll-guide__arrow {
    width: 10px;
    height: 14px;

    fill: none;
    stroke: #fff;
    stroke-width: 1;

    stroke-linecap: round;
    stroke-linejoin: round;

    animation: scrollArrow 1.5s ease-in-out infinite;
}

@keyframes scrollArrow {

    0%,
    100% {
        transform: translateY(-3px);
        opacity: 0.4;
    }

    50% {
        transform: translateY(4px);
        opacity: 1;
    }
}



@keyframes LOGOANIM {

    0%,
    100% {
        opacity: 0.8;
    }

    50% {
        opacity: 1.0;
    }
}