*{box-sizing:border-box}body{margin:0;font-family:system-ui,sans-serif;background:linear-gradient(#eef8ff,#faf7ff);color:#29205c}header{height:64px;display:flex;align-items:center;padding:12px 20px;background:#fff;position:sticky;top:0;z-index:9;border-bottom:1px solid #eee}header b{font-size:30px;color:#743cff}header span{margin-left:auto;background:#ddfaeb;color:#087e4b;padding:6px 10px;border-radius:20px;font-size:12px;font-weight:800}nav{position:fixed;left:0;top:64px;bottom:0;width:190px;background:#fff;padding:12px}nav button{width:100%;padding:12px;border:0;background:transparent;text-align:left;border-radius:12px;margin:3px 0}nav button.on{background:#743cff;color:#fff}main{margin-left:190px;padding:25px;max-width:1150px}.page{display:none}.page.on{display:block}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.grid button,.box,.tool,.gamebox{background:#fff;border:1px solid #eee8ff;border-radius:20px;padding:20px;box-shadow:0 10px 30px #49368a18}.grid button{font-size:18px;min-height:110px}.quick{display:flex;gap:8px;overflow:auto;margin:12px 0}.quick button,.bar button,section>button,.tool button{border:0;border-radius:12px;padding:10px 13px;background:#743cff;color:#fff}.bar{display:flex;gap:7px;background:#fff;padding:8px;border-radius:16px;box-shadow:0 8px 25px #49368a18}.bar input{flex:1;min-width:100px;border:0;outline:0;padding:9px}#chat{min-height:300px}.bot,.me{padding:12px 15px;border-radius:17px;max-width:80%;background:#fff;box-shadow:0 5px 18px #49368a16}.me{margin-left:auto;background:#743cff;color:#fff}iframe{display:none;width:100%;height:60vh;border:1px solid #ddd;border-radius:16px;margin-top:12px}.note{font-size:12px;color:#777}.box,.tool,.gamebox{margin-top:15px}canvas{background:#fff;max-width:100%;touch-action:none;border:1px solid #ddd}.toolbar{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:10px}.memory{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;max-width:450px}.memory button{aspect-ratio:1;font-size:27px;border:0;border-radius:12px;background:#743cff;color:#fff}.answers{display:grid;gap:8px}.answers button{padding:12px;border:1px solid #ddd5ff;border-radius:12px;background:#faf9ff}.board{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;max-width:400px;background:#d3c9ea;padding:7px;border-radius:14px;touch-action:none}.tile{aspect-ratio:1;background:#f5f1ff;border-radius:9px;display:grid;place-items:center;font-weight:900;font-size:24px}.arrows{display:grid;grid-template-columns:repeat(3,50px);gap:5px;justify-content:center;margin:10px}.arrows button{height:45px}.hide{visibility:hidden}video{width:100%;max-height:420px;background:#111}.videoWrap{position:relative}.overlay{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);color:#fff;font-size:28px;font-weight:900;text-shadow:0 2px 5px #000}
@media(max-width:700px){nav{top:auto;bottom:0;left:0;right:0;width:auto;height:68px;display:grid;grid-template-columns:repeat(5,1fr);z-index:10;padding:5px}nav button:nth-child(n+6){display:none}nav button{text-align:center;font-size:11px;padding:5px}main{margin:0;padding:15px 15px 85px}.grid{grid-template-columns:repeat(2,1fr)}h1{font-size:27px}}