.loading_screen{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 1001;
    background: white;
    align-items: center;
    justify-content: center;
}
.loading_screen.loaded{
    opacity: 0;
    visibility: hidden;
}
.loading_inside{
    width: 150px;
    height: max-content;
    align-items: center;
    justify-content: center;
    clip-path: polygon(0 0, 0 0, 0 100%, 0 100%);
}
.loading_inside img{
    width: 100%;
    height: auto;
}
.section.section_1{
    width: 100%;
    height: 100vh;
    padding: 200px 80px 40px;
}
.section_container{
    width: 100%;
    position: relative;
}
.section_container.for_sec1{
    height: 100%;
    align-items: center;
    justify-content: center;
    padding: 80px 10px;
}
.section_title_box.for_sec1{
    padding: 10px;
    width: max-content;
    z-index: 1;
    position: relative;
}
.section_title_box.for_sec1::before,.section_title_box.for_sec1::after{
    content: "";
    position: absolute;
    aspect-ratio: 1;
    border-radius: 50%;
}
.section_title_box.for_sec1::before{
    height: 100%;
    left: -60px;
    top: -60px;
    background: rgb(10, 153, 153);
}
.section_title_box.for_sec1::after{
    height: 60%;
    bottom: -35px;
    right: -35px;
    background: rgb(116, 203, 158);
}
.section_title.for_sec1{
    font-size: 2.5vw;
    font-weight: bold;
    letter-spacing: 2px;
    padding: 10px;
    z-index: 1;
    white-space: nowrap;
    filter: drop-shadow(4px 3px white);
}
.section_title.for_sec1.for_strong{
    color: rgb(245, 102, 102);
    font-size: 4vw;
}

.section.section_intro{
    padding: 80px 0;
    align-items: center;
    gap: 40px;
}
.section_container.for_sec_intro{
    flex-wrap: wrap;
}
.section_content_box.for_sec_intro{
    flex: 1;
    flex-basis: 500px;
    position: relative;
    gap: 40px;
}
.section_content_box.for_sec_intro.box_2{
    padding: 10px;
    padding-right: 0;
}

.intro_image_box{
    width: 90%;
    height: max-content;
    border-radius: 0 100vh 100vh 0;
    overflow: hidden;
    padding: 5px;
    padding-left: 0;
    background: white;
    border: 2px solid rgb(245, 102, 102);
    border-left: none;
    z-index: 2;
}
.intro_image_box img{
    width: 100%;
    height: auto;
    border-radius: 0 100vh 100vh 0;
}
.intro_text{
    z-index: 1;
}
.intro_text.text_1{
    align-items: flex-start;
    gap: 10px;
}
.intro_text_inside{
    font-size: 48px;
    letter-spacing: 2px;
    position: relative;
    text-shadow: 2px 2px white;
}
.intro_text_inside::before{
    content: "";
    position: absolute;
    width: 100%;
    height: 2px;
    background: rgb(245, 102, 102);
    bottom: 0;
    right: -10%;
}

.sec_intro_back{
    position: absolute;
    border-radius: 50%;
}
.sec_intro_back.back_1{
    width: 40vh;
    height: 40vh;
    background: rgb(10, 153, 153);
    top: 0;
    left: -20vh;
}
.sec_intro_back.back_2{
    width: 60vh;
    height: 60vh;
    background: rgb(116, 203, 158);
    top: 20vh;
    left: 0;
}
.sec_intro_back.back_3{
    width: 40vh;
    height: 40vh;
    background: rgb(15, 201, 201);
    top: 10vh;
    right: 20vh;
}
.intro_text_box{
    padding: 0 50px;
    align-items: flex-start;
    gap: 20px;
    width: 100%;
}
.intro_text.text_2{
    font-size: 24px;
    font-weight: bold;
    letter-spacing: 2px;
    text-align: justify;
    line-height: 1.8em;
    text-shadow: 2px 2px white;
}

.section.section_2{
    padding: 80px;
}
.section_container.for_sec2{
    height: max-content;
    flex-wrap: wrap;
    padding: 50px;
    overflow: hidden;
    gap: 15px;
}
.section_container.for_sec2::before{
    position: absolute;
    content: "";
    inset: 30px;
    background: rgb(255, 255, 255, 0.5);
}
.container_border{
    width: 100%;
    height: 20px;
    position: absolute;
    background: radial-gradient(circle at center, rgb(245, 102, 102) 20%, transparent 20%);
    background-size: 20px 20px;
    background-repeat: repeat-x;
    left: 0;
}
.container_border.border_1{
    top: 0;
}
.container_border.border_2{
    bottom: 0;
}
.section_content_box.for_sec2{
    flex: 1;
    flex-basis: 500px;
    gap: 40px;
    padding: 5px;
    z-index: 1;
    align-items: center;
    justify-content: center;
}
.section_title_box.for_under{
    position: relative;
    justify-content: flex-end;
}
.section_title.for_under{
    font-size: 42px;
    letter-spacing: 2px;
    padding: 10px 15px;
    z-index: 1;
    filter: drop-shadow(3px 2px white);
    color: rgb(245, 102, 102);
}
.section_title_icon{
    position: absolute;
    height: 100%;
    width: max-content;
}
.section_title_icon.icon_1{
    left: -5%;
}
.section_title_icon.icon_2{
    right: -5%;
}
.section_title_icon img{
    height: 100%;
    width: auto;
}
.section_content_text_box.for_sec2{
    width: 100%;
    height: max-content;
    gap: 15px;
    align-items: flex-end;
}
.section_text.text_1{
    font-size: 18px;
    line-height: 1.8em;
    letter-spacing: 1px;
    text-align: justify;
    padding: 10px 15px;
    background: white;
    border-radius: 10px;
}
.section_text.text_1 .for_strong{
    color: rgb(245, 102, 102);
    font-weight: bold;
}
.section_image_box{
    width: 80%;
    height: max-content;
    padding: 5px;
    border: 2px solid rgb(245, 102, 102);
    background: white;
}
.section_image_box img{
    width: 100%;
    height: auto;
}

.section.section_3{
    padding: 80px;
}
.section_container.for_sec3{
    height: max-content;
    padding: 50px;
    overflow: hidden;
    gap: 40px;
    align-items: center;
}
.section_title.for_sec3{
    text-align: center;
}
.section_text_box.for_sec3{
    width: 100%;
    max-width: 800px;
    height: max-content;
    padding: 15px;
    align-items: flex-start;
    background: white;
    border-radius: 10px;
    box-shadow: 3px 3px rgb(245, 102, 102), -3px -3px rgb(245, 102, 102);
}
.section_content_row.for_sec3{
    width: 100%;
    height: max-content;
    padding: 15px;
    gap: 15px;
    flex-wrap: wrap;
}
.section_content_box.for_sec3{
    flex: 1;
    flex-basis: 600px;
    gap: 15px;
    padding: 15px;
    align-items: flex-start;
    position: relative;
}
.section_content_box.for_sec3::before,.section_content_box.for_sec3::after{
    content: "";
    position: absolute;
    z-index: -1;
    border-radius: 50%;
}
.section_content_box.for_sec3::after{
    width: 40vh;
    height: 40vh;
    top: 0;
    left: 0;
    background: rgb(116, 203, 158);
    /* box-shadow: 0 0 30px rgb(244, 244, 244), 10px 10px 60px 10px rgb(116, 203, 158),inset 0 0 60px rgb(244, 244, 244); */
    /* border-radius: 30% 70% 70% 30% / 30% 52% 48% 70%; */
}
.section_content_box.for_sec3::before{
    width: 60vh;
    height: 60vh;
    bottom: 0;
    right: 10vh;
    background: rgb(10, 153, 153);
    /* border-radius: 86% 14% 49% 51% / 65% 52% 48% 35%; */
}
.content_title_box.for_sec3{
    width: 100%;
    max-width: 500px;
    padding: 10px;
    position: relative;
    overflow: hidden;
}
.content_title_box.for_sec3::before{
    content: "";
    position: absolute;
    width: 100%;
    max-width: 200px;
    height: 2px;
    background: rgb(95, 48, 4);
    bottom: 0;
    right: 0;
}
.content_title_back{
    position: absolute;
    width: 80px;
    height: max-content;
    bottom: 0;
    right: 0;
}
.content_title_back img{
    width: 100%;
    height: auto;
}
.content_title.for_sec3{
    font-size: 28px;
    line-height: 1.8em;
    letter-spacing: 1px;
    z-index: 1;
    text-shadow: 2px 2px white;
}
.content_title.for_sec3::first-letter{
    font-size: 36px;
    color: rgb(245, 102, 102);
}
.content_image_box.for_sec3{
    width: 100%;
    max-width: 500px;
    height: 300px;
    align-self: center;
    background-size: cover;
    overflow: hidden;
    align-items: flex-start;
    position: relative;
    border: 2px solid rgb(245, 102, 102);
}
.content_image_box.for_sec3::before{
    content: "";
    position: absolute;
    inset: 0;
    border: 5px solid white;
}
.content_image_box.for_sec3 img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.content_text_box.for_sec3{
    width: 100%;
    max-width: 500px;
    padding: 10px;
    align-self: flex-end;
}

.section.section_4{
    padding: 80px;
}
.section_4_image_container{
    width: 100%;
    max-width: 1200px;
    height: 40vh;
    grid-template-columns: 1fr 2fr 1fr;
    grid-template-rows: repeat(2, 1fr);
    grid-template-areas: 
    "grid2 grid1 grid3"
    "grid4 grid1 grid5";
    gap: 5px;
    padding: 5px;
    border-radius: 10px;
    position: relative;
}
.section_4_image_container::before,.section_4_image_container::after{
    content: "";
    position: absolute;
    height: 120%;
    aspect-ratio: 1;
    border-radius: 50%;
    z-index: -1;
}
.section_4_image_container::before{
    top: -10vh;
    left: -10vh;
    background: rgb(116, 203, 158);
}
.section_4_image_container::after{
    bottom: -10vh;
    right: -10vh;
    background: rgb(10, 153, 153);
}
.section_4_image_box{
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    border: 2px solid rgb(245, 102, 102);
    background: white;
    z-index: 1;
}
.section_4_image_box.box_1{
    grid-area: grid1;
}
.section_4_image_box.box_2{
    grid-area: grid2;
}
.section_4_image_box.box_3{
    grid-area: grid3;
}
.section_4_image_box.box_4{
    grid-area: grid4;
}
.section_4_image_box.box_5{
    grid-area: grid5;
}
.section_4_image_box::before{
    content: "";
    position: absolute;
    inset: 5px;
    border-radius: 5px;
}
.section_4_image_box.box_1::before{
    background-image: url(/src/img/yamashina_13.webp);
    background-size: cover;
    background-position: center;
}
.section_4_image_box.box_2::before{
    background-image: url(/src/img/work_sample_2.webp);
    background-size: cover;
    background-position: center;
}
.section_4_image_box.box_3::before{
    background-image: url(/src/img/work_sample_3.webp);
    background-size: cover;
    background-position: center;
}
.section_4_image_box.box_4::before{
    background-image: url(/src/img/yamashina_14.webp);
    background-size: cover;
    background-position: center;
}
.section_4_image_box.box_5::before{
    background-image: url(/src/img/work_sample_7.webp);
    background-size: cover;
    background-position: center;
}
@media all and (max-width:1100px){
    .section.section_1{
        padding: 80px 40px 40px;
    }
    .section_title.for_sec1{
        font-size: 4vw;
    }
    .section_title.for_sec1.for_strong{
        font-size: 5vw;
    }
    .intro_image_box{
        width: 95%;
        max-width: 600px;
    }
    .intro_text.text_1{
        padding: 0 10px;
    }
    .intro_text.text_1,.intro_text_box{
        align-self: flex-start;
    }
    .intro_text_box{
        gap: 10px;
    }
    .intro_text_inside{
        font-size: 36px;
    }
    .intro_text.text_2{
        font-size: 22px;
    }
    .sec_intro_back.back_1{
        top: -10vh;
        left: -10vh;
    }
    .sec_intro_back.back_2{
        width: 50vh;
        height: 50vh;
        top: 5vh;
        left: 10vh;
    }
    .sec_intro_back.back_3{
        top: 0;
        right: 0;
    }

    .section.section_2,.section.section_3,.section.section_4{
        padding: 20px 40px;
    }
    .section_container.for_sec2,.section_container.for_sec3{
       padding: 20px 10px;
    }
    .section_container.for_sec2::before{
        inset: 10px;
    }
    .container_border{
        display: none;
    }

    .section_content_row.for_sec3{
        padding: 0;
    }
    .section_content_box.for_sec3::before{
        right: 0;
    }
}
@media all and (max-width:900px){
    .section.section_2,.section.section_3,.section.section_4{
        padding: 20px 10px;
    }
    .intro_text.text_1{
        padding-top: 30px;
    }
}
@media all and (max-width:500px){
    .section.section_1{
        height: 60vh;
        padding: 40px 20px;
    }
    .section_container.for_sec1{
        align-items: flex-end;
        padding: 0;
    }
    .section_title.for_sec1{
        font-size: 6vw;
        filter: drop-shadow(2px 2px white);
    }
    .section_title.for_sec1.for_strong{
        font-size: 7.5vw;
    }
    .intro_text_inside{
        font-size: 24px;
    }
    .intro_text.text_2{
        font-size: 16px;
    }
    .sec_intro_back.back_2{
        width: 40vh;
        height: 40vh;
        left: 0;
    }
    .sec_intro_back.back_3{
        width: 30vh;
        height: 30vh;
    }
    .section.section_2,.section.section_3,.section.section_4{
        padding: 10px 0px;
    }
    .section_title.for_under{
        font-size: 28px;
    }
    .section_text.text_1{
        font-size: 16px;
    }
    .section_content_box.box_2.for_sec2,.section_container.for_sec2::before{
        display: none;
    }
    .section_text_box.for_sec3{
        padding: 5px;
    }
    .content_title.for_sec3{
        font-size: 24px;
        white-space: nowrap;
    }
    .content_title.for_sec3::first-letter{
        font-size: 28px;
    }
    .content_image_box.for_sec3{
        height: 250px;
    }
    .section_content_row.for_sec3{
        gap: 50px;
    }
    .section_content_box.for_sec3{
        padding: 0;
    }
    .section_4_image_container{
        height: 70vh;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1.5fr 1fr;
        grid-template-areas: 
        "grid3 grid2"
        "grid1 grid1"
        "grid4 grid5";
    }
    .section_4_image_container::before,.section_4_image_container::after{
        height: 50%;
    }
    .section_4_image_container::before{
        top: -10px;
        left: -10px;;
    }
    .section_4_image_container::after{
        bottom: -10px;
        right: -10px;
    }
}