:root{--bg:#090d10;--card:#12191e;--line:#26323a;--text:#f3f5f6;--muted:#9ba7ad;--orange:#f47a10;--green:#4ccc83}
*{box-sizing:border-box}body{margin:0;background:#050708;color:var(--text);font:15px system-ui,-apple-system,Segoe UI,Roboto,Arial}
button,input,textarea,select{font:inherit}.app{max-width:560px;margin:auto;min-height:100vh;background:linear-gradient(#0a0f12,#080b0d);padding-bottom:76px}
header{position:sticky;top:0;z-index:5;background:#0b1013ee;backdrop-filter:blur(10px);border-bottom:1px solid var(--line);padding:16px;display:flex;justify-content:space-between;align-items:center}
header b{font-size:21px;letter-spacing:1px}header b span{color:var(--orange)}header small{display:block;color:var(--muted);margin-top:3px}.status{font-size:11px;padding:6px 8px;border:1px solid var(--line);border-radius:999px;color:var(--muted)}
main{padding:14px}.screen{display:none}.screen.active{display:block}.hero{padding:20px 4px}.hero em{font-style:normal;color:var(--orange);font-size:12px;font-weight:800;letter-spacing:1.3px}.hero h1{font-size:32px;margin:7px 0}.hero p{color:var(--muted)}
.askline{display:grid;grid-template-columns:1fr auto auto;background:#eef1f2;padding:6px;border-radius:14px;gap:5px}.askline input{border:0;outline:0;background:transparent;padding:10px}.askline button{border:0;border-radius:9px}.askline #quickAsk{background:var(--orange);color:white;font-weight:900}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px}.tiles.one{grid-template-columns:1fr}.tiles button{min-height:125px;background:linear-gradient(145deg,#172027,#0f1519);border:1px solid var(--line);border-radius:15px;color:white;text-align:left;padding:15px;font-size:25px}.tiles button b,.tiles button small{display:block}.tiles button b{font-size:15px;margin-top:10px}.tiles button small{font-size:12px;color:var(--muted);margin-top:5px}
.card{background:linear-gradient(145deg,var(--card),#0f1518);border:1px solid var(--line);border-radius:15px;padding:15px;margin:12px 0}.card h2{font-size:18px;margin-top:0}.card p{line-height:1.5;color:#d4dade}.title{display:flex;align-items:center;gap:8px}.title button{border:0;background:none;color:white;font-size:24px}.title h1{font-size:22px}
label{display:block;color:var(--muted);font-size:13px;margin-bottom:6px}textarea,.search{width:100%;background:#0b1114;color:white;border:1px solid var(--line);border-radius:11px;padding:12px;outline:0}.formrow{display:flex;gap:8px;margin-top:10px}.formrow select{flex:1;background:#0d1418;color:white;border:1px solid var(--line);border-radius:10px;padding:10px}.upload{margin:0;border:1px dashed #46555e;border-radius:10px;padding:10px;color:white}.upload input{display:none}.primary{width:100%;border:0;border-radius:11px;background:var(--orange);color:white;font-weight:900;padding:13px;margin-top:12px}.preview{width:100%;max-height:300px;object-fit:cover;border-radius:11px;margin-top:10px}.hidden{display:none!important}
.answer-text h2{font-size:17px;color:white;border-top:1px solid var(--line);padding-top:12px}.answer-text h2:first-child{border:0;padding-top:0}.answer-text li,.answer-text p{line-height:1.5;color:#d9dfe2}.mode{font-size:11px;color:var(--muted);margin-bottom:10px}.lesson{display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);padding:12px 0}.lesson:first-child{border-top:0}.lesson b{display:block}.lesson small{color:var(--muted)}
.chips{display:flex;gap:7px;overflow:auto;margin:10px 0}.chip{white-space:nowrap;background:#11181c;color:#cdd4d7;border:1px solid var(--line);border-radius:99px;padding:7px 10px}.chip.active{background:var(--orange);border-color:var(--orange);color:white}.video{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:14px;margin:9px 0}.video b{display:block}.video small{color:var(--orange)}.video p{color:var(--muted);margin-bottom:0}
.projectHead h2{margin-bottom:4px}.progress{height:9px;background:#263139;border-radius:99px;overflow:hidden}.progress div{height:100%;background:var(--orange)}.task{display:flex;gap:10px;border-top:1px solid var(--line);padding:12px 0}.task.done span{text-decoration:line-through;color:var(--muted)}code{font-size:12px;color:#ffd1a8}
nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(560px,100%);height:68px;background:#0a0f12f5;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr)}nav button{border:0;background:none;color:var(--muted);font-size:19px}nav button small{display:block;font-size:10px}nav button.active{color:var(--orange)}