.tool-box {
    border: 3px solid var(--color-text);
    border-radius: 6px;
    padding: var(--small-space);
    width: fit-content;
    margin: 0 auto;
    align-items: center;
    display: flex;
    flex-direction: column;
}

.skill-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 2px solid var(--color-purple);
    border-radius: 6px;
    padding: 10px 18px;
    font-size: var(--small-font);
    font-weight: var(--thin-font);
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--big-space)
}

.header__logo {
    font-size: var(--big-font);
    font-weight: var(--semi-bold-font);
    letter-spacing: 0.03em;
    color: var(--color-text);
}

.header__logo--accent {
    color: var(--color-purple);
}

.case-hero__media {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.text-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 50px 40px;
    margin-top: var(--small-space);
}

.text-grid__item {
    border-left: 2px solid var(--color-purple);
    padding-left: var(--small-space);
    display: flex;
    flex-direction: column;
}

.work-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 70px 40px;
    margin-left: var(--big-space);
    margin-bottom: var(--small-space);
}

.work-grid__col {
    border-left: 2px solid var(--color-purple);
    padding-left: var(--small-space);
    display: flex;
    flex-direction: column;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 40px;
    margin-left: var(--big-space);
    margin-bottom: var(--small-space);
}

.three-row-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 400px));
    gap: 40px;
    margin-left: var(--big-space);
    margin-top: var(--big-space);
    object-fit: contain;
}

.two-row-image-grid-with-heading {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 100px;
    margin: 0 auto;
}

.case-hero {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 80px;
    padding-top: var(--big-space);
    padding-bottom: 90px;
}

.two-row-image-grid-with-heading--smartphone {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 100px;
    max-width: 700px;
    margin: 0 auto;
}

.hero-gallery-smartphone {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-padding-left: 0;
    padding-bottom: 12px;
    gap: 16px;
    max-width: 310px;
}

.hero-gallery-normal{
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-padding-left: 0;
    padding-bottom: 12px;
    gap: 16px;
    max-width: 600px;
}

/* レスポンシブ */
@media (max-width: 900px) {
    .three-row-grid {
        grid-template-columns: repeat(1, minmax(0, 1fr));
        margin-left: 0;
}

    .two-row-image-grid-with-heading,
    .two-row-image-grid-with-heading--smartphone {
        grid-template-columns: minmax(0, 1fr);
}

    .case-hero {
        grid-template-columns: minmax(0, 1fr);
        gap: 40px;
        padding-top: 0;
        grid-template-areas:
    "media"
    "intro";
    }

    .header {
        flex-direction: column;
        gap: 16px;
        padding-bottom: var(--small-space);
        align-items: center;
    }

    .case-hero__media {
        grid-area: media;
    }
}

@media (max-width: 700px) {
    .text-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .work-grid,
    .image-grid {
        grid-template-columns: minmax(0, 1fr);
        margin-left: 0;
    }
}