@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&display=swap');

*{margin:0;padding:0;box-sizing:border-box}
:root{
  --navy:#0A0F2E;--navy2:#1A237E;--blue:#3D5AFE;--blue2:#536DFE;
  --gold:#FFB300;--green:#00C896;--orange:#FF6B35;--purple:#7C3AED;
  --teal:#0891B2;--pink:#E91E63;--red:#EF4444;
  --surface:#F4F6FF;--white:#fff;--text:#0A0F2E;--muted:#64748B;--border:#E2E8F0;
  --sw:240px;--hh:64px;
}
body{font-family:'Plus Jakarta Sans',sans-serif;background:var(--surface);color:var(--text)}
.layout{display:flex;min-height:100vh}

/* ── SIDEBAR ── */
.sidebar{width:var(--sw);min-width:var(--sw);height:100vh;position:fixed;left:0;top:0;background:var(--navy);display:flex;flex-direction:column;z-index:100;overflow-y:auto}
.sl{padding:18px 16px 14px;display:flex;align-items:center;gap:10px;border-bottom:1px solid rgba(255,255,255,.07);flex-shrink:0}
.lb{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--gold),#FF8F00);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.lb svg{width:18px;height:18px}
.li p{color:#fff;font-size:11px;font-weight:800;letter-spacing:1.2px}
.li span{color:rgba(255,255,255,.4);font-size:9px}
.snav{flex:1;padding:10px 8px;scrollbar-width:none}
.snav::-webkit-scrollbar{display:none}
.sg{margin-bottom:18px}
.st{font-size:9px;font-weight:700;letter-spacing:1.5px;color:rgba(255,255,255,.3);padding:0 8px;margin-bottom:5px;text-transform:uppercase}
.ni{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:9px;cursor:pointer;margin-bottom:1px;color:rgba(255,255,255,.55);font-size:12px;font-weight:600;transition:all .15s;position:relative;text-decoration:none;user-select:none}
.ni:hover{background:rgba(255,255,255,.07);color:rgba(255,255,255,.9)}
.ni.active{background:rgba(61,90,254,.25);color:#fff}
.ni.active::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;background:var(--blue2);border-radius:0 3px 3px 0}
.ni svg{width:15px;height:15px;flex-shrink:0;opacity:.8}
.ni.active svg{opacity:1}
.nb{margin-left:auto;background:var(--blue);color:#fff;font-size:9px;font-weight:700;padding:1px 6px;border-radius:20px;min-width:18px;text-align:center}
.nb.gold{background:var(--gold);color:var(--navy)}
.nb.green{background:var(--green);color:var(--navy)}
.sf{padding:12px 14px;border-top:1px solid rgba(255,255,255,.07);flex-shrink:0}
.ap{display:flex;align-items:center;gap:9px;background:rgba(255,255,255,.06);border-radius:10px;padding:9px 11px}
.av{width:30px;height:30px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,var(--blue),var(--blue2));display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900;color:#fff}
.ai p{color:#fff;font-size:11px;font-weight:700;line-height:1.2}
.ai span{color:rgba(255,255,255,.4);font-size:9px}
.lb-btn{margin-left:auto;background:none;border:none;cursor:pointer;color:rgba(255,255,255,.4);transition:color .2s;padding:3px}
.lb-btn:hover{color:#fff}

/* ── MAIN ── */
.main{margin-left:var(--sw);flex:1;display:flex;flex-direction:column;min-width:0}
.hdr{height:var(--hh);background:var(--white);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 22px;position:sticky;top:0;z-index:50;flex-shrink:0}
.pt{font-size:16px;font-weight:800;color:var(--text)}
.pb{font-size:10px;color:var(--muted);margin-top:1px}
.hr{display:flex;align-items:center;gap:8px}
.ib{width:34px;height:34px;border-radius:9px;background:var(--surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s;position:relative}
.ib:hover{border-color:var(--blue)}
.ib svg{width:15px;height:15px;color:var(--muted)}
.nd{position:absolute;top:5px;right:5px;width:6px;height:6px;background:var(--gold);border-radius:50%;border:1.5px solid var(--white)}
.ct{padding:22px;flex:1}

/* ── PAGES ── */
.pg{display:none}
.pg.active{display:block}

/* ── STATS ── */
.sg2{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:22px}
.sc{background:var(--white);border-radius:16px;padding:18px;border:1px solid var(--border);display:flex;align-items:center;gap:12px;transition:transform .15s,box-shadow .15s}
.sc:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.07)}
.si{width:44px;height:44px;border-radius:12px;flex-shrink:0;display:flex;align-items:center;justify-content:center}
.sv{font-size:22px;font-weight:900;color:var(--text);line-height:1}
.sl2{font-size:10px;color:var(--muted);font-weight:600;margin-top:2px}

/* ── CHARTS ── */
.cg{display:grid;grid-template-columns:2fr 1fr;gap:14px;margin-bottom:22px}
.cc{background:var(--white);border-radius:16px;padding:18px;border:1px solid var(--border)}
.ct2{font-size:13px;font-weight:800;color:var(--text)}
.cs{font-size:10px;color:var(--muted);margin-top:2px}
.bc{display:flex;align-items:flex-end;gap:5px;height:110px;margin-top:16px}
.bw{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;height:100%;justify-content:flex-end}
.br{width:100%;border-radius:5px 5px 0 0;min-width:0}
.bl{font-size:8px;color:var(--muted);font-weight:600;white-space:nowrap}
.bv{font-size:8px;font-weight:700}
.dw{display:flex;flex-direction:column;align-items:center;gap:14px}
.dc{position:relative;width:90px;height:90px}
.dc svg{transform:rotate(-90deg)}
.dcl{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.dcl .v{font-size:18px;font-weight:900;color:var(--text)}
.dcl .l{font-size:8px;color:var(--muted);font-weight:600}
.dl{width:100%;display:flex;flex-direction:column;gap:5px}
.dli{display:flex;align-items:center;gap:7px;font-size:10px;font-weight:600;color:var(--muted)}
.dd{width:7px;height:7px;border-radius:50%;flex-shrink:0}
.dli span:last-child{margin-left:auto;font-weight:700;color:var(--text)}

/* ── BUTTONS ── */
.qa{display:flex;gap:9px;margin-bottom:22px;flex-wrap:wrap}
.qb{display:flex;align-items:center;gap:7px;padding:9px 16px;border-radius:11px;border:none;font-size:12px;font-weight:700;font-family:'Plus Jakarta Sans',sans-serif;cursor:pointer;transition:all .15s}
.qb.p{background:var(--navy);color:#fff;box-shadow:0 4px 12px rgba(10,15,46,.2)}
.qb.p:hover{background:var(--navy2)}
.qb.s{background:var(--white);color:var(--text);border:1px solid var(--border)}
.qb.s:hover{border-color:var(--blue);color:var(--blue)}
.qb svg{width:14px;height:14px}
.mla{margin-left:auto}

/* ── TABLES ── */
.tg{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.tc{background:var(--white);border-radius:16px;border:1px solid var(--border);overflow:hidden}
.th2{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}
.tt{font-size:12px;font-weight:800;color:var(--text)}
.va{font-size:10px;font-weight:700;color:var(--blue);cursor:pointer}
.ftc{background:var(--white);border-radius:16px;border:1px solid var(--border);overflow:hidden}
table{width:100%;border-collapse:collapse}
th{font-size:9px;font-weight:700;color:var(--muted);letter-spacing:.5px;text-transform:uppercase;padding:10px 14px;text-align:left;background:var(--surface)}
td{font-size:11px;font-weight:600;color:var(--text);padding:10px 14px;border-top:1px solid var(--border)}
tr:hover td{background:rgba(61,90,254,.02)}

/* ── BADGES ── */
.badge{padding:2px 9px;border-radius:20px;font-size:9px;font-weight:700;display:inline-block}
.badge.easy{background:rgba(0,200,150,.1);color:var(--green)}
.badge.medium{background:rgba(255,179,0,.12);color:#B45309}
.badge.hard{background:rgba(239,68,68,.1);color:var(--red)}
.badge.active{background:rgba(0,200,150,.1);color:var(--green)}
.badge.inactive{background:rgba(100,116,139,.1);color:var(--muted)}
.badge.published{background:rgba(61,90,254,.1);color:var(--blue)}
.badge.draft{background:rgba(100,116,139,.1);color:var(--muted)}
.badge.practice{background:rgba(124,58,237,.1);color:var(--purple)}
.sd{width:7px;height:7px;border-radius:50%;display:inline-block;margin-right:5px}
.qp{max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ── ACTION BUTTONS ── */
.ab{display:flex;gap:5px}
.ab2{width:28px;height:28px;border-radius:7px;border:1px solid var(--border);background:var(--surface);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s;font-size:10px;font-weight:700}
.ab2:hover{border-color:var(--blue);background:rgba(61,90,254,.06)}
.ab2.dl:hover{border-color:var(--red);background:rgba(239,68,68,.06)}
.ab2 svg{width:12px;height:12px;color:var(--muted)}
.ab2:hover svg{color:var(--blue)}
.ab2.dl:hover svg{color:var(--red)}

/* ── PAGINATION ── */
.pgn{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-top:1px solid var(--border);font-size:11px;color:var(--muted);font-weight:600}
.pgbs{display:flex;gap:3px}
.pb2{width:28px;height:28px;border-radius:7px;border:1px solid var(--border);background:var(--white);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:11px;font-weight:700;color:var(--muted);transition:all .15s}
.pb2:hover{border-color:var(--blue);color:var(--blue)}
.pb2.active{background:var(--blue);border-color:var(--blue);color:#fff}

/* ── FILTERS ── */
.fr{display:flex;gap:9px;margin-bottom:16px;flex-wrap:wrap;align-items:center}
.si2{height:36px;background:var(--white);border:1px solid var(--border);border-radius:9px;padding:0 11px;font-size:11px;font-weight:600;color:var(--text);font-family:'Plus Jakarta Sans',sans-serif;cursor:pointer;outline:none;min-width:120px;transition:border-color .15s}
.si2:focus{border-color:var(--blue)}
.sw2{position:relative}
.sw2 svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);width:13px;height:13px;color:var(--muted)}
.sin{height:36px;background:var(--white);border:1px solid var(--border);border-radius:9px;padding:0 12px 0 32px;font-size:11px;font-weight:600;color:var(--text);font-family:'Plus Jakarta Sans',sans-serif;outline:none;min-width:200px;flex:1;transition:border-color .15s}
.sin:focus{border-color:var(--blue)}

/* ── STUDENT ROWS ── */
.str{display:flex;align-items:center;gap:8px}
.sav{width:28px;height:28px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;color:#fff}
.sin2 p{font-size:11px;font-weight:700;color:var(--text);line-height:1.3}
.sin2 span{font-size:9px;color:var(--muted)}

/* ── CHIPS ── */
.tp3{padding:5px 12px;border-radius:20px;font-size:11px;font-weight:700;border:1.5px solid var(--border);cursor:pointer;transition:all .15s;color:var(--muted)}
.tp3:hover{border-color:var(--blue);color:var(--blue)}
.tp3.active{background:rgba(61,90,254,.1);border-color:var(--blue);color:var(--blue)}

/* ── EMPTY STATES ── */
.er{text-align:center;padding:36px;color:var(--muted);font-size:12px;font-weight:600}
.er2{text-align:center;padding:36px}
.er2 p{color:var(--muted);font-size:12px;font-weight:700;margin-bottom:4px}
.er2 span{font-size:10px;color:var(--muted)}

/* ── TOAST ── */
.toast{position:fixed;bottom:20px;right:20px;z-index:999;color:#fff;padding:10px 18px;border-radius:10px;font-size:12px;font-weight:700;box-shadow:0 8px 24px rgba(10,15,46,.25);display:flex;align-items:center;gap:7px;transform:translateY(80px);opacity:0;transition:all .3s cubic-bezier(.34,1.56,.64,1);max-width:320px}
.toast.show{transform:translateY(0);opacity:1}

/* ── MODALS ── */
.mo{position:fixed;inset:0;background:rgba(10,15,46,.5);z-index:200;display:none;align-items:center;justify-content:center;padding:16px;backdrop-filter:blur(4px)}
.mo.open{display:flex}
.md{background:var(--white);border-radius:20px;width:100%;max-width:620px;max-height:92vh;overflow-y:auto;box-shadow:0 32px 80px rgba(10,15,46,.25);animation:su .22s ease}
.md.sm{max-width:460px}
@keyframes su{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
.mh{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--white);z-index:1;border-radius:20px 20px 0 0}
.mt2{font-size:15px;font-weight:900;color:var(--text)}
.mc{width:30px;height:30px;border-radius:9px;background:var(--surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s;flex-shrink:0}
.mc:hover{background:rgba(239,68,68,.08);border-color:rgba(239,68,68,.3)}
.mc svg{width:13px;height:13px;color:var(--muted)}
.mb{padding:20px 22px}
.mf{padding:14px 22px;border-top:1px solid var(--border);display:flex;gap:9px;justify-content:flex-end;position:sticky;bottom:0;background:var(--white);border-radius:0 0 20px 20px}

/* ── FORM FIELDS ── */
.frow{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.frow.s1{grid-template-columns:1fr}
.frow.s3{grid-template-columns:1fr 1fr 1fr}
.fg{display:flex;flex-direction:column;gap:5px}
.fg label{font-size:10px;font-weight:700;color:var(--text);letter-spacing:.3px}
.fi{height:38px;background:var(--surface);border:1.5px solid var(--border);border-radius:9px;padding:0 11px;font-size:12px;font-weight:600;color:var(--text);font-family:'Plus Jakarta Sans',sans-serif;outline:none;transition:border-color .15px;width:100%}
.fi:focus{border-color:var(--blue);background:var(--white)}
.fi.err{border-color:var(--red)}
.fta{min-height:80px;background:var(--surface);border:1.5px solid var(--border);border-radius:9px;padding:9px 11px;font-size:12px;font-weight:600;color:var(--text);font-family:'Plus Jakarta Sans',sans-serif;outline:none;resize:vertical;transition:border-color .15s;width:100%}
.fta:focus{border-color:var(--blue);background:var(--white)}
.fls{font-size:10px;font-weight:700;color:var(--text);margin-bottom:7px;display:block}

/* ── OPTIONS (MCQ) ── */
.or{display:flex;align-items:center;gap:9px;margin-bottom:9px;background:var(--surface);border-radius:10px;padding:8px 12px;border:1.5px solid var(--border);transition:border-color .15s}
.or:focus-within{border-color:var(--blue);background:var(--white)}
.or.selected-opt{border-color:var(--green);background:rgba(0,200,150,.04)}
.ol{width:26px;height:26px;border-radius:7px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800}
.oa{background:rgba(61,90,254,.1);color:var(--blue)}
.ob{background:rgba(255,107,53,.1);color:var(--orange)}
.oc{background:rgba(124,58,237,.1);color:var(--purple)}
.od{background:rgba(0,200,150,.1);color:var(--green)}
.or input{flex:1;background:none;border:none;outline:none;font-size:12px;font-weight:600;color:var(--text);font-family:'Plus Jakarta Sans',sans-serif;min-width:0}
.rc{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--border);flex-shrink:0;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;background:var(--white);position:relative}
.rc:hover{border-color:var(--green)}
.rc.sel{background:var(--green);border-color:var(--green)}
.rc.sel::after{content:'';position:absolute;width:5px;height:5px;background:white;border-radius:50%}
.rc-label{font-size:9px;color:var(--muted);font-weight:600;white-space:nowrap}

/* ── MODAL BUTTONS ── */
.bcl{padding:9px 18px;border-radius:9px;background:var(--surface);border:1px solid var(--border);font-size:12px;font-weight:700;font-family:'Plus Jakarta Sans',sans-serif;cursor:pointer;color:var(--muted);transition:all .15s}
.bcl:hover{border-color:var(--text);color:var(--text)}
.bsv{padding:9px 22px;border-radius:9px;background:var(--navy);border:none;font-size:12px;font-weight:700;font-family:'Plus Jakarta Sans',sans-serif;cursor:pointer;color:#fff;transition:all .15s}
.bsv:hover{background:var(--navy2)}
.bsv.bl{background:var(--blue)}
.bsv.bl:hover{background:var(--blue2)}
.bsv.rd{background:var(--red)}
.bsv.rd:hover{background:#DC2626}
.bsv.gr{background:var(--green);color:var(--navy)}
.bsv.gr:hover{background:#00A87E}
.bsv.pu{background:var(--purple)}
.bsv.pu:hover{background:#6D28D9}
.bsv:disabled{opacity:.6;cursor:not-allowed}

/* ── CONFIRM OVERLAY ── */
.cov{position:fixed;inset:0;background:rgba(10,15,46,.5);z-index:300;display:none;align-items:center;justify-content:center;backdrop-filter:blur(4px)}
.cov.open{display:flex}
.cob{background:var(--white);border-radius:18px;padding:26px;max-width:360px;width:90%;box-shadow:0 24px 60px rgba(10,15,46,.2);animation:su .2s ease}
.coi{width:44px;height:44px;border-radius:12px;background:rgba(239,68,68,.1);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.coTitle{font-size:15px;font-weight:900;color:var(--text);margin-bottom:5px}
.coMsg{font-size:12px;color:var(--muted);line-height:1.6;margin-bottom:18px}
.cob2{display:flex;gap:9px;justify-content:flex-end}

/* ── CHECKBOXES ── */
.cls-wrap{display:flex;flex-wrap:wrap;gap:8px}
.cls-wrap label{display:flex;align-items:center;gap:6px;font-size:11px;font-weight:600;cursor:pointer;padding:5px 12px;border-radius:8px;border:1.5px solid var(--border);transition:all .15s;color:var(--muted)}
.cls-wrap label:hover{border-color:var(--blue);color:var(--blue)}
.cls-wrap input[type=checkbox]{display:none}
.cls-wrap input:checked + span{color:var(--blue)}
.cls-wrap label:has(input:checked){background:rgba(61,90,254,.08);border-color:var(--blue);color:var(--blue)}
.cls-card{background:var(--white);border-radius:14px;border:1px solid var(--border);padding:16px;display:flex;flex-direction:column;gap:10px;transition:box-shadow .15s}
.cls-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.07)}
.cls-num{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:900;color:#fff;flex-shrink:0}

/* ── Q TYPE BTNS ── */
.q-type-btn:hover{border-color:var(--blue)!important;background:rgba(61,90,254,.05)!important}

/* ── PRACTICE SETS ── */
.ps-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
.ps-card{background:var(--white);border-radius:18px;border:1px solid var(--border);overflow:hidden;transition:box-shadow .2s,transform .15s}
.ps-card:hover{box-shadow:0 8px 32px rgba(0,0,0,.08);transform:translateY(-2px)}
.ps-card-header{padding:18px 18px 14px;display:flex;align-items:flex-start;gap:12px}
.ps-icon{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.ps-card-body{padding:0 18px 14px}
.ps-stat-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.ps-stat{padding:4px 10px;background:var(--surface);border-radius:20px;font-size:10px;font-weight:700;color:var(--muted)}
.ps-progress{height:4px;background:var(--surface);border-radius:4px;overflow:hidden;margin-bottom:10px}
.ps-progress-bar{height:100%;border-radius:4px;transition:width .4s}
.ps-card-footer{padding:12px 18px;border-top:1px solid var(--border);display:flex;gap:8px;align-items:center}
.diff-badge{padding:3px 10px;border-radius:20px;font-size:9px;font-weight:800;text-transform:uppercase;letter-spacing:.5px}
.diff-easy{background:rgba(0,200,150,.1);color:var(--green)}
.diff-mixed{background:rgba(255,179,0,.12);color:#B45309}
.diff-hard{background:rgba(239,68,68,.1);color:var(--red)}

/* ── QUESTION PICKER ── */
.qpick-item{padding:10px 14px;border-bottom:1px solid var(--border);cursor:pointer;display:flex;gap:10px;align-items:flex-start;transition:background .1s}
.qpick-item:hover{background:rgba(61,90,254,.03)}
.qpick-check{width:18px;height:18px;border-radius:50%;border:1.5px solid var(--border);flex-shrink:0;margin-top:2px;background:var(--white);display:flex;align-items:center;justify-content:center;transition:all .15s}
.qpick-check.sel{background:var(--purple);border-color:var(--purple)}
.qpick-check.sel::after{content:'✓';color:#fff;font-size:9px;font-weight:900}

/* ── RESPONSIVE ── */
@media(max-width:1100px){
  .sg2{grid-template-columns:repeat(2,1fr)}
  .cg{grid-template-columns:1fr}
  .tg{grid-template-columns:1fr}
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:10px}