/* sec01 */
.container01 {
    width: 100%;
    height: 45vw;
    position: relative;
    background-image: url(../images/preservation/mv_preservation.png );
    background-size: cover;
    background-position: top;
    background-repeat: no-repeat;
}

.container01 .txt__top1 {
    text-decoration: underline;
    text-underline-offset: 16px;
    text-decoration-thickness: 1px;
}

.container01 .txt__top1 span {
    font-size: 4rem;
}

.container01 .txt__top2 {
    padding-top: 1.2rem;
}

#introduction {
    position: relative;
    /* overflow: hidden; */
    padding-bottom: 8rem;

    &::after {
        position: absolute;
        content: "";
        display: block;
        width: 4px;
        height: 60px;
        background-color: var(--color-main);
        z-index: -1;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
    }

    & .container {
        position: relative;
        text-align: center;

        font-family: "Zen Old Mincho", serif;
        font-weight: 400;

        padding-top: 6rem;

        & .txt__01 {
            margin-bottom: 48px;
            font-size: 2rem;
            color: var(--color-main);
        }

        & .txt__02 {
            font-size: 2.5rem;
            text-indent: 0;
            padding-left:2.5rem;
        }

        & .txt__03 {
            font-size: 4rem;
            color: var(--color-main);
            text-indent: 4rem;
        }

        & .introduction-bg {
            display: none;

        }
    }


}

@media screen and (min-width: 999.8px) {

    h2 {
        font-size: 3.5rem;
    }

    h3 {
        font-size: 2.6rem;
    }

    /* sec01 */
    .container01 {
        width: 100%;
        height: 27vw;
        position: relative;
        background-size: cover;
        background-position: top;
        background-repeat: no-repeat;
    }

    .container01 .txt__top1 span {
        font-size: 6rem;
    }

    .container01 .txt__top2 {
        padding-top: unset;
    }

    #introduction {
        /* overflow: hidden; */

        & .container {
            padding-top: 0;

            & .txt__01 {
                margin-bottom: 60px;
                font-size: 2rem;
            }

            & .txt__02 {
                font-size: 4rem;
                text-indent: 4rem;
                padding-left: unset;
            }

            & .txt__03 {
                font-size: 6rem;
                text-indent: 6rem;
            }

            & .introduction-bg {
                display: block;
                position: absolute;
                top: -80%;
                right: 0;
                width: 100%;
                height: 100%;
                z-index: -1;
                text-align: right;

            }
        }

    }

}

#fixed-bg {
    font-family: sans-serif;
    background: url('../images/preservation/preservation_bg.png') center/cover fixed no-repeat;
}

.spacer {
    height: 80px;
}

/* キービジュアル */
.keyvisual img {
    width: 100%;
    height: auto;
    display: block;
}


/* 背景を見せるための余白 */
.fixed-spacer {
    height: 100vh;
}

@media screen and (max-width: 999.8px) {
    #fixed-bg {
        background: none;
    }

}

/* グリッド付きコンテンツエリア */
.content-area {
    margin-top: -350px;
    position: relative;
    z-index: 1;
    min-height: 600px;
    padding: 60px 20px;
}

.grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    width: 80%;
    max-width: 1400px;
    margin: 60px auto;
    overflow: hidden;
    opacity: 0;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    background-color: rgba(0, 0, 0, 0.6);
    border-radius: 8px;
    padding: 56px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.grid-container.show {
    opacity: 1;
    transform: translateY(0);
}

.grid-text {
    color: #fff;
    transition: transform 0.3s ease;
}

.grid-text h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-left: 6px solid #00817a;
    padding-left: 12px;
}

.grid-container:hover .grid-text {
    transform: translateY(-5px);
}

.grid-image img {
    width: 100%;
    height: auto;
    display: block;
}

@media screen and (max-width: 1000px) {
    .content-area {
        margin-top: -30px;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }

    .grid-container {
        display: flex;
        flex-direction: column;
        width: 100%;
        margin: 0;
        padding-inline: 0;
        background-color: transparent;
        box-shadow: none;
        gap: 30px;
        padding: 30px;

    }

    .grid-container.__01 .grid-text {
        order: 1;
    }

    .grid-container.__01 .grid-image {
        order: 2;
    }

    .grid-text h2 {
        font-size: 2.4rem;
    }

    .grid-text {
        color: var(--color-black);
    }

    .order-sm-1 {
        order: 1;
    }
    .order-sm-2 {
        order: 2;
    }
    .order-sm-3 {
        order: 3;
    }
    .order-sm-4 {
        order: 4;
    }
    .order-sm-5 {
        order: 5;
    }
    .order-sm-6 {
        order: 6;
    }

}


.img-caption {
    text-align: right;
    /* font-size: 0.75rem; */
    color: #ddd;
    margin-top: 8px;
}

@media screen and (max-width: 1000px) {
    .img-caption {
        text-align: center;
        color: var(--color-black);
    }
}

.bg-wrap {
    overflow: hidden;
    opacity: 0;
}

.bg-wrap+.bg-wrap {
    margin-top: 10px;
}

.bg-wrap .inn {
    display: block;
    opacity: 0;
    transform: matrix(1, 0, 0, 1, 0, 100);
    transition: 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.bg-wrap h2.inn {
    font-size: 2.4rem;
}

.bg-wrap p.inn {
    line-height: 2;
    padding-left: 2rem;
}

@media screen and (max-width: 1000px) {
    .bg-wrap p.inn {
        padding-left: 0;
    }
}

.grid-container.show .bg-wrap {
    opacity: 1;
}

.grid-container.show .bg-wrap .inn {
    opacity: 1;
    transform: matrix(1, 0, 0, 1, 0, 0);
}

/* 左からスライドイン（1個目） */
.grid-image.slide-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: all 1.2s ease-out;
}

.grid-container.show .grid-image.slide-left {
    opacity: 1;
    transform: translateX(0);
}

/* 右からスライドイン（2個目） */
.grid-image.slide-right {
    opacity: 0;
    transform: translateX(40px);
    transition: all 1.2s ease-out;
}

.grid-container.show .grid-image.slide-right {
    opacity: 1;
    transform: translateX(0);
}


.grid-container.show .grid-image {
    opacity: 1;
    transform: translateX(0);
}


#attempt {
    background-color: #ecf5f5;

    & .container {
        max-width: 1120px;
        margin: 0 auto;
        padding: 120px 0 30px;
    }


    & h2.heading {
        border-left: 6px solid var(--color-main);
        padding-left: 16px;
        margin-bottom: 16px;
    }

    & .grid-container {
        align-items: start;
        background: none;
        box-shadow: none;
        width: 100%;
        padding-inline: 0;
        margin-top: 0;

        & .grid-text {
            color: var(--color-black);
            line-height: 2;

            &>p:not(:last-child) {
                margin-bottom: 2rem;
            }
        }
    }

    & .container {
        & .content-attempt {
            & .grid-container {
                grid-template-columns: repeat(3, 1fr);
            }

            & h3 {
                background-color: var(--color-main);
                color: var(--color-white);
                padding: 16px 24px;
                margin-bottom: 24px;
                font-size: 1.8rem;
            }
        }
    }
}

@media screen and (max-width: 1000px) {
    #attempt {

        & .container {
            padding-inline: 20px;
            padding-top: 60px;
        }

        & h2.heading {
            font-size: 2.4rem;
        }

        & .grid-container {
    
            & .grid-text {
    
                &>p:not(:last-child) {
                    margin-bottom: 0;
                }
            }
        }
    

        & .container {
            & .content-attempt {
                & .grid-container {
                    display: grid;
                    grid-template-columns: repeat(2, 1fr);
                    gap: 8px;
                }

                & h3 {
                    margin-bottom: 8px;
                }
            }
        }
    }
}