@charset "UTF-8";:root{--black-color:#404040;--gray-color:#495057;--light-color:#F8F9FA;--white-color:#fff;--primary-color:#3399D5;--eigo-color:#048753;--eigo-color-bg:#E2EFD2;--sugaku-color:#662D89;--sugaku-color-bg:#E2D4E8}@font-face{font-family:"Noto Sans JP Local";src:local("Noto Sans JP"),local("Noto Sans CJK JP")}*{box-sizing:border-box}html{height:100%;font-size:62.5%}body{background-color:#F2F2F2;color:var(--black-color);margin:0;padding:0;font-family:"Noto Sans JP Local","Noto Sans JP","Hiragino Kaku Gothic ProN","Hiragino Sans",sans-serif;font-size:1.6rem;line-height:1.5}@media screen and (min-width:721px){html{font-size:75%}}@media screen and (max-width:720px){html{font-size:62.5%}}a.disabled{pointer-events:none;opacity:.6;cursor:default;text-decoration:none}.heading-banner{background:var(--gray-color);color:var(--white-color)}#eigo .heading-banner{background:var(--eigo-color);color:var(--white-color)}#sugaku .heading-banner{background:var(--sugaku-color);color:var(--white-color)}.heading-inner{display:flex;flex-direction:column;align-items:flex-start;gap:.8rem;padding:1.2em 1em}.heading-badge{background:var(--primary-color);color:var(--white-color);font-size:1.2rem;padding:.3em .8em;border-radius:.5rem;letter-spacing:.02em}.heading-title{margin:0;font-weight:800;font-size:2.6rem;letter-spacing:.02em}footer{width:100%;padding:20px;border-top:#E1DFDD solid 1px;text-align:center}footer .attention{color:var(--gray-color);text-align:center;font-size:1.2rem;line-height:1.5;padding:0 0 1rem 0}@media screen and (max-width:768px){footer .attention{text-align:left}}footer small{color:var(--gray-color);padding:0;font-size:1.2rem;font-family:Roboto,sans-serif}.container_bg{background:#EBEFF0}.contents_box .note,.container_bg .note{color:var(--gray-color);font-size:1.2rem;line-height:1.5;padding-left:1em;text-indent:-1em;text-align:justify}.chapter-title{display:flex;align-items:center;justify-content:space-between;gap:1rem;cursor:pointer;margin:0;padding:1.7rem 1.25rem;border:1px solid #d0d7de;border-radius:.5rem;background:#fff;color:var(--black-color);box-shadow:0 1px 1px rgba(0,0,0,.03),0 2px 6px rgba(0,0,0,.04);font-size:1.4rem;font-weight:700;line-height:1.4;box-sizing:border-box;transition:background .2s ease}#eigo .chapter-title{color:var(--eigo-color)}#sugaku .chapter-title{color:var(--sugaku-color)}.chapter-title:hover{background:var(--light-color)}#eigo .chapter-title:hover{background:var(--eigo-color-bg)}#sugaku .chapter-title:hover{background:var(--sugaku-color-bg)}.acc-icon{width:0;height:0;flex:0 0 auto;border-left:8px solid transparent;border-right:8px solid transparent;border-top:12px solid var(--gray-color);transition:transform .25s ease}#eigo .acc-icon{border-top:12px solid var(--eigo-color)}#sugaku .acc-icon{border-top:12px solid var(--sugaku-color)}.chapter-title[aria-expanded="true"] .acc-icon{transform:rotate(180deg)}.chapter-title[aria-expanded="true"]{background:var(--light-color);border-color:#d0d7de;border-radius:.5rem .5rem 0 0}#eigo .chapter-title[aria-expanded="true"]{background:var(--eigo-color-bg)}#sugaku .chapter-title[aria-expanded="true"]{background:var(--sugaku-color-bg)}.video-list{margin-top:0;max-height:0;overflow:hidden;transition:max-height .25s ease}@media (prefers-reduced-motion:reduce){.video-list{transition:none}}@supports (-webkit-overflow-scrolling:touch){.video-list{transition:none!important}}.video-list .list-group-item{border:none;border-bottom:1px solid #ddd;background-color:var(--white-color);transition:background-color 0.2s;padding:1rem 1.25rem}.video-list .list-group-item:hover{background-color:var(--light-color)}.video-list .list-group-item:hover{background-color:var(--light-color)}.video-list .line{display:inline-block;width:6px;height:24px;background-color:var(--gray-color);margin-right:10px}#eigo .video-list .line{background-color:var(--eigo-color)}#sugaku .video-list .line{background-color:var(--sugaku-color)}.video-list .title{font-weight:700;font-size:1.4rem;color:var(--black-color)}.video-list .btn{font-weight:700;background-color:var(--gray-color)!important;color:var(--white-color)}#eigo .video-list .btn{background-color:var(--eigo-color)!important;color:var(--white-color)}#sugaku .video-list .btn{background-color:var(--sugaku-color)!important;color:var(--white-color)}.video-list i{margin-right:6px}.list-group,.list-group-item:first-child{border-top-left-radius:0!important;border-top-right-radius:0!important}.list-group,.list-group-item:last-child{border-bottom-left-radius:.5rem;border-bottom-right-radius:.5rem}.list-group,.list-group-item{border-left:1px solid #d0d7de;border-right:1px solid #d0d7de}