:root{font-family:"Noto Sans JP","Yu Gothic",sans-serif;color:#173c48;background:#f2f7f8;font-size:16px}*{box-sizing:border-box}body{margin:0}header{background:#063c59;color:#fff;padding:18px 5%;display:flex;gap:20px;align-items:center}header b{color:#79e1e2;letter-spacing:.12em}main{max-width:1300px;margin:auto;min-height:calc(100vh - 130px)}button,input,select{font:inherit}.login{max-width:540px;margin:60px auto;background:#fff;padding:35px;border-radius:20px;box-shadow:0 15px 45px #17404a22}.login h1{font-size:2rem}.login form,.login label{display:grid;gap:8px}.login form{gap:18px}.login input,.login select{padding:12px;border:1px solid #b9c9ce;border-radius:8px}.login button,.primary{border:0;background:#087d8d;color:#fff;padding:12px 20px;border-radius:8px;font-weight:700;cursor:pointer}.error{color:#b42318}.loading{text-align:center;padding:80px}.layout{display:grid;grid-template-columns:270px 1fr}.side{background:#fff;padding:20px;border-right:1px solid #dce6e8;min-height:80vh}.profile{background:#e8f7f7;padding:15px;border-radius:12px;margin-bottom:18px}.profile span{display:block;font-size:.85rem}.nav button{width:100%;border:0;background:transparent;text-align:left;padding:11px;border-radius:8px;margin:3px 0}.nav button.active{background:#087d8d;color:#fff}.nav button:disabled{opacity:.45}.content{padding:30px}.chapter-title h1{font-size:2.3rem;margin:.3rem 0}.chapter-title p{color:#60737b}.lesson{background:#fff;border:1px solid #d9e4e6;border-radius:14px;margin:14px 0;overflow:hidden}.lesson>button{width:100%;border:0;background:transparent;text-align:left;padding:18px;display:grid;grid-template-columns:45px 1fr auto;gap:12px;align-items:center}.number{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#087d8d;color:#fff;font-weight:bold}.lesson h2{font-size:1.15rem;margin:0}.lesson small{color:#087d8d}.lesson-body{border-top:1px solid #dce6e8;padding:20px}.audio{background:#063c59;color:#fff;padding:18px;border-radius:12px}.audio button{background:#f4b41b;border:0;padding:10px 16px;border-radius:8px;font-weight:bold;margin-top:10px}.bar{height:9px;background:#557480;border-radius:10px;overflow:hidden;margin:10px 0}.bar i{display:block;height:100%;background:#5ed7dc}.times{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}.times div{border:1px solid #cddcde;padding:10px;border-radius:8px}.times span{display:block;font-size:.78rem;color:#60737b}.quiz{border-top:1px solid #ddd;margin-top:18px;padding-top:10px}.question{padding:12px 0;border-bottom:1px solid #edf0f1}.question label{display:block;padding:5px}.result{font-weight:bold;padding:12px}.pass{color:#147653}.fail{color:#b42318}.locked{opacity:.55}.chapter-exam{background:#fff;border:2px solid #087d8d;border-radius:14px;padding:20px;margin-top:25px}footer{text-align:center;padding:18px;color:#60737b;font-size:.8rem}@media(max-width:800px){.layout{grid-template-columns:1fr}.side{min-height:auto}.nav{display:flex;overflow:auto}.nav button{min-width:130px}.content{padding:16px}.times{grid-template-columns:1fr}.lesson>button{grid-template-columns:40px 1fr}.status{grid-column:2}.chapter-title h1{font-size:1.8rem}}
