/* ========================================
   ページ別CSS: Gallery（フォトギャラリー）
   ========================================
   ヒーロー + 正方形グリッド + リッチモーダル（画像 / Vimeo）。
   変数（_variables.css）とBEM（.gallery-*）を使用。
   ======================================== */

.gallery-wrapper {
    min-height: 100vh;
}

.gallery-msg {
    margin: var(--f-space-m) auto var(--f-space-l);
    text-align: center;
    font-size: var(--f-font-size-s);
    color: var(--f-color-sub);
}

.gallery-hero {
    position: relative;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.gallery-hero__strip {
    position: absolute;
    inset: 0;
    overflow: hidden;
    isolation: isolate;
}

.gallery-hero__track {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    width: 300%;
    height: 100%;
    will-change: transform;
    backface-visibility: hidden;
    animation: gallery-hero-flow 45s linear infinite;
}

@keyframes gallery-hero-flow {
    0% { transform: translate3d(0, 0, 0); }
    100% { transform: translate3d(-50%, 0, 0); }
}

.gallery-hero__slide {
    height: 100%;
    min-width: 0;
    position: relative;
}

.gallery-hero__slide img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.gallery-hero__overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse 60% 55% at 50% 50%,
        rgba(var(--f-color-bg-rgb), 0.25) 0%,
        rgba(var(--f-color-bg-rgb), 0.4) 40%,
        rgba(var(--f-color-bg-rgb), 0.65) 70%,
        rgba(var(--f-color-bg-rgb), 0.9) 100%
    );
    pointer-events: none;
}

.gallery-hero__content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--f-space-xxl);
}

.gallery-hero__title {
    font-family: var(--f-font-accent);
    font-size: clamp(var(--f-font-size-huge-xxl), 8vw, var(--f-font-size-huge-xxxxxl));
    font-weight: var(--f-font-weight-light);
    letter-spacing: var(--f-letter-spacing-widest);
    color: var(--f-color-text);
    text-shadow: var(--f-text-shadow-rich);
    margin: 0 0 var(--f-space-s);
    line-height: var(--f-line-height-tight);
}

.gallery-hero__lead {
    font-size: var(--f-font-size-l);
    letter-spacing: var(--f-letter-spacing-wide);
    color: var(--f-color-accent);
    margin: 0;
    text-shadow: var(--f-text-shadow-subtle);
}

.gallery-hero__scroll-down {
    position: absolute;
    bottom: var(--f-space-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    color: var(--f-color-text);
    font-family: var(--f-font-accent);
    font-size: var(--f-font-size-base);
    letter-spacing: var(--f-letter-spacing-wider);
    text-align: center;
    opacity: 0.8;
}

.gallery-hero__scroll-down::after {
    content: "";
    display: block;
    width: 1px;
    height: var(--f-space-huge);
    background: var(--f-color-text);
    margin: var(--f-space-s) auto 0;
    animation: gallery-scroll-down var(--f-duration-epic-slow) var(--f-ease-scroll) infinite;
}

@keyframes gallery-scroll-down {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    50.1% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

@media (max-width: 768px) {
    .gallery-hero {
        min-height: 100dvh;
    }
}

.gallery-section {
    padding: var(--f-space-huge-xxl) var(--f-space-huge-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.gallery-section__title {
    font-family: var(--f-font-accent);
    font-size: var(--f-font-size-huge);
    font-weight: var(--f-font-weight-light);
    letter-spacing: var(--f-letter-spacing-widest);
    color: var(--f-color-accent);
    text-align: center;
    margin: var(--f-space-huge-xl) 0 calc(var(--f-space-huge-xxl) + 50px);
    position: relative;
}

.gallery-section__title::before,
.gallery-section__title::after {
    content: "";
    display: block;
    width: 70%;
    max-width: 280px;
    height: 1px;
    background: linear-gradient(
        to right,
        transparent 0%,
        var(--f-border-medium) 20%,
        var(--f-border-medium) 80%,
        transparent 100%
    );
    margin-left: auto;
    margin-right: auto;
}

.gallery-section__title::before {
    margin-bottom: calc(var(--f-space-l) + 30px);
}

.gallery-section__title::after {
    margin-top: calc(var(--f-space-l) + 30px);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--f-space-m);
    margin-bottom: var(--f-space-xxxl);
}

.gallery-grid__item {
    position: relative;
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
    overflow: hidden;
    border-radius: var(--f-radius-m);
    box-shadow: var(--f-shadow-medium);
    aspect-ratio: 1 / 1;
    transition: box-shadow var(--f-duration-normal) var(--f-ease-smooth),
                transform var(--f-duration-normal) var(--f-ease-smooth);
}

.gallery-grid__item::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: radial-gradient(
        ellipse 60% 55% at 50% 50%,
        rgba(var(--f-color-bg-rgb), 0.25) 0%,
        rgba(var(--f-color-bg-rgb), 0.4) 40%,
        rgba(var(--f-color-bg-rgb), 0.65) 70%,
        rgba(var(--f-color-bg-rgb), 0.9) 100%
    );
    pointer-events: none;
    transition: opacity var(--f-duration-normal) var(--f-ease-smooth);
}

@media (min-width: 769px) {
    .gallery-grid__item:hover::before {
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .gallery-grid__item.is-centered::before {
        opacity: 0;
    }
}

.gallery-grid__item:hover {
    box-shadow: var(--f-shadow-rich);
    transform: translateY(-2px);
}

.gallery-grid__item:focus-visible {
    outline: 2px solid var(--f-color-accent);
    outline-offset: 4px;
}

.gallery-grid__item img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform var(--f-duration-slow) var(--f-ease-image);
}

.gallery-grid__item:hover img {
    transform: scale(1.06);
}

.gallery-grid__icon {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--f-color-bg-rgb), 0.25);
    opacity: 0;
    transition: opacity var(--f-duration-normal) var(--f-ease-smooth);
}

.gallery-grid__item:hover .gallery-grid__icon {
    opacity: 1;
}

.gallery-grid__icon::after {
    content: "";
    width: var(--f-space-huge);
    height: var(--f-space-huge);
    border: 2px solid var(--f-color-accent);
    border-radius: var(--f-radius-circle);
    background: rgba(var(--f-color-bg-rgb), 0.5);
}

.gallery-grid__icon--image::after {
    box-shadow: inset 0 0 0 2px var(--f-color-accent);
}

.gallery-grid__icon--video::after {
    border: none;
    background: transparent;
    width: 0;
    height: 0;
    border-left: 26px solid var(--f-color-accent);
    border-top: 16px solid transparent;
    border-bottom: 16px solid transparent;
    margin-left: 6px;
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--f-space-s);
        margin-bottom: var(--f-space-xxl);
    }

    .gallery-section {
        padding: var(--f-space-huge-xl) var(--f-space-l);
    }

    .gallery-section__title {
        margin: var(--f-space-huge) 0 calc(var(--f-space-huge-xl) + 50px);
    }
}

.gallery-cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--f-space-xl);
    padding: var(--f-space-huge-xxl) var(--f-space-xxl);
    margin-top: var(--f-space-huge-xl);
}

.gallery-cta .c-button {
    margin: 0;
}

@media (max-width: 768px) {
    .gallery-cta {
        flex-direction: column;
        align-items: stretch;
        gap: var(--f-space-l);
        padding: var(--f-space-huge-xl) var(--f-space-l);
        margin-top: var(--f-space-huge);
    }

    .gallery-cta.c-button-group .c-button {
        flex: none;
        width: 100%;
        max-width: none;
    }
}

.gallery-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--f-space-l);
    visibility: hidden;
    opacity: 0;
    transition: visibility var(--f-duration-normal) var(--f-ease-smooth),
                opacity var(--f-duration-normal) var(--f-ease-smooth);
}

.gallery-modal.is-open {
    visibility: visible;
    opacity: 1;
}

.gallery-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(var(--f-color-bg-rgb), 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
}

.gallery-modal__inner {
    position: relative;
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    transform: scale(0.96);
    transition: transform var(--f-duration-normal) var(--f-ease-smooth);
}

.gallery-modal.is-open .gallery-modal__inner {
    transform: scale(1);
}

.gallery-modal__close {
    position: absolute;
    top: var(--f-space-m);
    right: var(--f-space-m);
    z-index: 3;
    width: var(--f-space-xxl);
    height: var(--f-space-xxl);
    padding: 0;
    border: none;
    background: rgba(var(--f-color-bg-rgb), 0.6);
    color: var(--f-color-accent);
    border-radius: var(--f-radius-circle);
    cursor: pointer;
    transition: color var(--f-duration-fast) var(--f-ease-smooth),
                background var(--f-duration-fast) var(--f-ease-smooth),
                transform var(--f-duration-fast) var(--f-ease-smooth);
}

.gallery-modal__close:hover {
    color: var(--f-color-btn-hover-text);
    background: var(--f-color-accent);
    transform: scale(1.08);
}

.gallery-modal__close::before,
.gallery-modal__close::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 2px;
    background: currentColor;
    transform: translate(-50%, -50%) rotate(45deg);
}

.gallery-modal__close::after {
    transform: translate(-50%, -50%) rotate(-45deg);
}

.gallery-modal__body {
    display: flex;
    flex-direction: column;
    background: rgba(var(--f-color-bg-rgb), 0.95);
    border: 1px solid var(--f-border-subtle);
    border-radius: var(--f-radius-m);
    overflow: hidden;
    box-shadow: var(--f-shadow-epic);
}

.gallery-modal__content {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.gallery-modal__content--image {
    position: relative;
}

.gallery-modal__content--image .gallery-modal__img-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-mask-image:
        linear-gradient(to right, transparent 0%, black 18%, black 82%, transparent 100%),
        linear-gradient(to bottom, transparent 0%, black 18%, black 82%, transparent 100%);
    mask-image:
        linear-gradient(to right, transparent 0%, black 18%, black 82%, transparent 100%),
        linear-gradient(to bottom, transparent 0%, black 18%, black 82%, transparent 100%);
    -webkit-mask-composite: source-in;
    mask-composite: intersect;
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
}

.gallery-modal__content--image .gallery-modal__img-wrap img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.gallery-modal__content--video .gallery-modal__video-wrap {
    position: relative;
    overflow: hidden;
    background: #000;
}

.gallery-modal__content--video .gallery-modal__video-wrap iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.gallery-modal__content--video-landscape .gallery-modal__video-wrap {
    width: 100%;
    padding-bottom: 56.25%;
    height: 0;
}

.gallery-modal__content--video-portrait.gallery-modal__content {
    justify-content: center;
}

.gallery-modal__content--video-portrait .gallery-modal__video-wrap {
    width: 36.5625vh;
    max-width: 100%;
    padding-bottom: 177.78%;
    height: 0;
}

.gallery-modal__content--video-square .gallery-modal__video-wrap {
    width: 100%;
    padding-bottom: 100%;
    height: 0;
}

.gallery-modal__footer {
    padding: var(--f-space-xl) var(--f-space-xxl) var(--f-space-xxl);
    position: relative;
}

.gallery-modal__footer::after {
    content: "";
    display: block;
    width: 70%;
    height: 1px;
    background: var(--f-border-medium);
    margin-top: var(--f-space-xl);
    margin-left: 0;
}

.gallery-modal__title {
    font-family: var(--f-font-accent);
    font-size: var(--f-font-size-xxl);
    font-weight: var(--f-font-weight-light);
    letter-spacing: var(--f-letter-spacing-wide);
    color: var(--f-color-accent);
    margin: 0 0 var(--f-space-s);
    line-height: var(--f-line-height-tight);
}

.gallery-modal__description {
    font-size: var(--f-font-size-base);
    line-height: var(--f-line-height-relaxed);
    color: var(--f-color-sub-lighter);
    margin: 0;
}

@media (max-width: 768px) {
    .gallery-modal {
        padding: var(--f-space-m);
    }

    .gallery-modal__inner {
        max-height: 88vh;
    }

    .gallery-modal__close {
        top: var(--f-space-s);
        right: var(--f-space-s);
        width: var(--f-space-xl);
        height: var(--f-space-xl);
    }

    .gallery-modal__close::before,
    .gallery-modal__close::after {
        width: 16px;
    }

    .gallery-modal__footer {
        padding: var(--f-space-l) var(--f-space-l) var(--f-space-xl);
    }

    .gallery-modal__title {
        font-size: var(--f-font-size-xl);
    }

    .gallery-modal__description {
        font-size: var(--f-font-size-m);
    }
}