*{box-sizing:border-box}html,body{color:#eef2ff;background:#070a10;margin:0;font-family:Inter,Arial,sans-serif}body{min-height:100vh}button,input,select,textarea{font:inherit}.app{min-height:100vh}.nav{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:20;background:#090d15e8;border-bottom:1px solid #20283a;align-items:center;gap:28px;height:68px;padding:0 28px;display:flex;position:sticky;top:0}.logo{font-size:23px;font-weight:900}.logo span{color:#9b7cff}.navlinks{color:#8995a8;gap:22px;font-size:14px;display:flex}.navlinks button{color:inherit;cursor:pointer;background:0 0;border:0}.navlinks button:hover{color:#fff}.navright{align-items:center;gap:10px;margin-left:auto;display:flex}.btn{color:#fff;cursor:pointer;background:#121a28;border:1px solid #263044;border-radius:10px;padding:10px 15px;font-weight:700}.btn.primary{background:linear-gradient(135deg,#7557ff,#a77dff);border-color:#8065ff}.btn.green{background:#1c9c45;border-color:#2dbd5b}.page{max-width:1260px;margin:auto;padding:42px 28px}.hero{grid-template-columns:1.1fr .9fr;align-items:center;gap:34px;padding:55px 0 70px;display:grid}.eyebrow{letter-spacing:1.5px;text-transform:uppercase;color:#a999ff;font-size:12px;font-weight:800}.hero h1{margin:12px 0;font-size:60px;line-height:1.02}.gradient{background:linear-gradient(90deg,#fff,#9c7dff);color:#0000;-webkit-background-clip:text}.muted{color:#8995a8}.hero p{max-width:670px;font-size:17px;line-height:1.7}.actions{gap:12px;margin-top:25px;display:flex}.card{background:#0d131e;border:1px solid #20283a;border-radius:16px;padding:22px}.preview{box-shadow:0 30px 80px #0009}.previewtop{color:#7d899c;justify-content:space-between;font-size:12px;display:flex}.grid2{grid-template-columns:1fr 1fr;gap:12px;display:grid}.stat{background:#0a1019;border:1px solid #20283a;border-radius:12px;padding:15px}.stat b{font-size:25px}.bar{background:#20283a;border-radius:8px;height:7px;margin-top:12px;overflow:hidden}.bar i{background:linear-gradient(90deg,#7355ff,#b08bff);height:100%;display:block}.features,.stats,.topics{gap:13px;display:grid}.features{grid-template-columns:repeat(3,1fr);margin:25px 0 70px}.feature{background:#0d131e;border:1px solid #20283a;border-radius:16px;padding:22px}.feature h3{margin:14px 0 8px}.feature p{font-size:14px;line-height:1.6}.icon{color:#b29eff;background:#1c1738;border-radius:11px;place-items:center;width:40px;height:40px;display:grid}.authWrap{place-items:center;min-height:calc(100vh - 68px);padding:30px;display:grid}.auth{width:420px}.field{margin:16px 0}.field label{color:#b6c0d0;margin-bottom:7px;font-size:13px;display:block}.field input,.field select,.field textarea{color:#fff;background:#080d15;border:1px solid #263044;border-radius:10px;outline:none;width:100%;padding:12px}.field input:focus,.field select:focus{border-color:#7d62ff}.auth .btn{width:100%;margin-top:10px}.switch{text-align:center;color:#8995a8;margin-top:16px;font-size:13px}.link{color:#aa91ff;cursor:pointer}.layout{grid-template-columns:225px 1fr;min-height:calc(100vh - 68px);display:grid}.side{background:#0a0f17;border-right:1px solid #20283a;padding:22px 14px}.side h4{color:#69758a;letter-spacing:1.2px;text-transform:uppercase;padding:0 10px;font-size:11px}.side button{text-align:left;color:#a8b2c4;cursor:pointer;background:0 0;border:0;border-radius:9px;width:100%;padding:11px}.side button.active,.side button:hover{color:#fff;background:#181f2d}.main{min-width:0;padding:30px}.welcome{justify-content:space-between;align-items:end;display:flex}.stats{grid-template-columns:repeat(4,1fr);margin:24px 0}.stats b{margin:8px 0;font-size:28px;display:block}.topics{grid-template-columns:repeat(4,1fr)}.topic{cursor:pointer;transition:all .18s}.topic:hover{border-color:#5c4aad;transform:translateY(-2px)}.topic small{color:#a894ff}.practice{grid-template-columns:.85fr 1.15fr;gap:15px;display:grid}.problem,.editor{min-height:650px}.tag{color:#c3cada;background:#1b2331;border-radius:20px;margin-right:5px;padding:5px 9px;font-size:11px;display:inline-block}.easy{color:#55e878;background:#10251a}.medium{color:#f4ca55;background:#29230e}.codebox{background:#070b11;border:1px solid #222c3f;border-radius:12px;overflow:hidden}.toolbar{background:#111825;border-bottom:1px solid #222c3f;align-items:center;gap:9px;height:48px;padding:0 10px;display:flex}.toolbar select{color:#fff;background:#0a0f17;border:1px solid #2a3448;border-radius:7px;padding:7px}.toolbar button{margin-left:auto}.code{resize:none;color:#d8def0;background:#070b11;border:0;outline:0;width:100%;height:430px;padding:16px;font:13px/1.65 Consolas,monospace}.tests{margin-top:16px}.test{border:1px solid #222c3f;border-radius:9px;justify-content:space-between;margin-top:8px;padding:11px;font:12px Consolas,monospace;display:flex}.pass{color:#35d35b}.fail{color:#ff6275}.generator{grid-template-columns:1fr 1fr auto;align-items:end;gap:12px;display:grid}.footer{text-align:center;color:#657084;border-top:1px solid #20283a;margin-top:30px;padding:28px}@media (max-width:900px){.hero,.practice,.features,.layout{grid-template-columns:1fr}.side{display:none}.stats,.topics{grid-template-columns:1fr 1fr}.navlinks{display:none}}@media (max-width:560px){.hero h1{font-size:42px}.stats,.topics{grid-template-columns:1fr}.page,.main{padding:20px 15px}.nav{padding:0 15px}.generator{grid-template-columns:1fr}.hero{padding-top:30px}}