:root{
  --bg:#f7f8fc;--card:#fff;--ink:#172033;--muted:#667085;--line:#e7e9f2;
  --accent:#635bff;--accent2:#8b5cf6;--accentSoft:#efefff;--green:#16a36a;
  --orange:#e98518;--red:#d74646;--nav:#111827;--shadow:0 10px 30px rgba(32,39,55,.07)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Noto Sans Bengali","Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}
#app{display:grid;grid-template-columns:264px 1fr;min-height:100vh}aside{background:linear-gradient(180deg,#121827 0%,#171d2d 100%);color:#fff;padding:22px 16px;position:sticky;top:0;height:100vh;overflow:auto;z-index:20}.brandWrap{display:flex;align-items:center;gap:11px;padding:4px 7px 19px;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:14px}.logoMark{width:42px;height:42px;display:grid;place-items:center;border-radius:13px;background:linear-gradient(135deg,#7c72ff,#b067ff);font-weight:900;font-size:17px;box-shadow:0 8px 24px #635bff55}.brand{font-size:19px;font-weight:850;line-height:1.05}.brand span{display:block;font-size:11px;color:#aab2c2;font-weight:600;margin-top:6px;letter-spacing:.2px}
nav{padding-bottom:100px}nav button{display:flex;align-items:center;gap:11px;width:100%;text-align:left;border:0;background:transparent;color:#bec5d1;padding:10px 12px;border-radius:10px;margin:2px 0;font-size:13.5px;cursor:pointer;transition:.18s}nav button::before{content:attr(data-icon);width:22px;text-align:center;font-size:16px}nav button.active,nav button:hover{background:linear-gradient(90deg,rgba(99,91,255,.26),rgba(99,91,255,.08));color:#fff}nav button.active{box-shadow:inset 3px 0 0 #8b83ff}.asideFoot{position:absolute;bottom:18px;left:16px;right:16px}.ghostSide{width:100%;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:#e5e7eb;padding:9px;border-radius:10px;cursor:pointer}.asideFoot small{display:block;color:#7f8a9e;margin-top:9px;text-align:center;font-size:10px}
main{padding:0 28px 36px;min-width:0}header{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);margin-bottom:24px;position:sticky;top:0;background:rgba(247,248,252,.93);backdrop-filter:blur(12px);z-index:10}.headerTitle h1{margin:0;font-size:25px;letter-spacing:-.4px}.headerTitle p{color:var(--muted);margin:5px 0 0;font-size:13px}.headerActions{display:flex;align-items:center;gap:10px}.searchBox{display:flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px 10px;min-width:250px}.searchBox input{border:0;outline:none;padding:0;width:100%;font-size:13px}.iconBtn{width:40px;height:40px;padding:0;border-radius:11px}.profileChip{display:flex;align-items:center;gap:8px;padding:5px 9px 5px 5px;background:#fff;border:1px solid var(--line);border-radius:13px}.avatar{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,#ebe9ff,#f4ebff);color:#544dd3;font-weight:900}.profileChip b{display:block;font-size:12px}.profileChip small{display:block;color:var(--muted);font-size:9.5px;margin-top:2px}
button,.btn{border:1px solid var(--line);background:#fff;color:#344054;padding:9px 13px;border-radius:10px;cursor:pointer;font-weight:700;transition:.15s}button:hover,.btn:hover{transform:translateY(-1px);box-shadow:0 4px 13px rgba(32,39,55,.08)}.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-color:transparent}.danger{color:#fff;background:var(--red);border-color:var(--red)}
.hero{position:relative;overflow:hidden;background:linear-gradient(120deg,#5a51ef 0%,#7868fb 48%,#9866ed 100%);color:#fff;border-radius:22px;padding:27px 28px;box-shadow:0 18px 45px rgba(99,91,255,.2)}.hero::after{content:"";position:absolute;width:260px;height:260px;border:42px solid rgba(255,255,255,.08);border-radius:50%;right:-80px;top:-105px}.heroGrid{display:grid;grid-template-columns:1.3fr .7fr;gap:18px;position:relative;z-index:1}.hero h2{font-size:28px;margin:0 0 8px}.hero p{margin:0;color:#eeedff;max-width:650px;line-height:1.6}.heroActions{margin-top:18px;display:flex;gap:9px}.hero .whiteBtn{background:#fff;color:#5048d8;border:0}.heroMetric{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-content:center}.heroMetric div{background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.13);border-radius:14px;padding:14px}.heroMetric b{display:block;font-size:22px}.heroMetric span{font-size:11px;color:#eeedff}
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:17px;box-shadow:0 1px 2px rgba(16,24,40,.02)}.statCard{display:flex;align-items:center;gap:13px}.statIcon{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;background:var(--accentSoft);font-size:20px}.stat strong{font-size:25px;display:block;line-height:1}.stat span{font-size:11px;color:var(--muted);display:block;margin-top:5px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.space{justify-content:space-between}.sectionTitle{font-size:18px;margin:25px 0 11px;letter-spacing:-.2px}.muted{color:var(--muted)}
.subjectGrid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.subject{cursor:pointer;position:relative;overflow:hidden;transition:.18s}.subject:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.subjectIcon{width:44px;height:44px;border-radius:13px;background:linear-gradient(135deg,#f0efff,#f7f4ff);display:grid;place-items:center;font-size:22px;margin-bottom:12px}.subject h3{margin:0 0 6px;font-size:15px}.subject .sourceLine{font-size:10.5px;color:var(--muted);min-height:29px}.courseFooter{display:flex;justify-content:space-between;align-items:center;margin-top:10px;font-size:10.5px;color:var(--muted)}.progress{height:7px;background:#edf0f5;border-radius:20px;overflow:hidden;margin-top:12px}.progress>i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),#9b6cff);border-radius:20px}
.pill{display:inline-flex;align-items:center;padding:4px 8px;border-radius:999px;font-size:10.5px;font-weight:800;background:#efefff;color:#5149d8}.status-pending{background:#fff0f0;color:#c33333}.status-submitted{background:#fff5e8;color:#bd6b0b}.status-complete{background:#e8f8f0;color:#128357}
.continueCard{display:grid;grid-template-columns:66px 1fr auto;gap:14px;align-items:center}.continueIcon{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;font-size:26px;background:linear-gradient(135deg,#edeaff,#f7edff)}.continueCard h3{margin:0 0 5px}.continueCard p{margin:0;color:var(--muted);font-size:12px}.continueCard .progress{max-width:390px}
.chapterList{display:grid;gap:8px}.chapter{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 13px;display:flex;justify-content:space-between;align-items:center;gap:12px;transition:.15s}.chapter:hover{border-color:#cfcaff;box-shadow:0 5px 18px rgba(99,91,255,.07)}.chapter button{margin-left:6px}
.playerShell{display:grid;grid-template-columns:250px 1fr;gap:16px}.playerSide{background:#fff;border:1px solid var(--line);border-radius:16px;padding:15px;align-self:start;position:sticky;top:110px}.playerSide h3{margin:0 0 4px;font-size:15px}.playerGate{display:flex;justify-content:space-between;gap:8px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:11.5px}.playerGate:last-child{border:0}.gateYes{color:var(--green);font-weight:800}.gateNo{color:#9aa2b2}.playerMain{min-width:0}.playerTop{background:linear-gradient(135deg,#171e31,#252e49);color:#fff;border-radius:18px;padding:20px 22px;margin-bottom:13px}.playerTop p{margin:6px 0 0;color:#bdc5d4;font-size:12px}.playerTop .row{margin-top:14px}.tabs{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 12px;background:#fff;border:1px solid var(--line);padding:7px;border-radius:13px;position:sticky;top:91px;z-index:8}.tabs button{padding:8px 10px;font-size:11px;border:0;background:transparent}.tabs button.active{background:#edeaff;color:#5149d8;box-shadow:none}
.lessonBox{line-height:1.75}.lessonBox h3{margin-top:0}.q{border-top:1px dashed var(--line);padding:14px 0}.q:first-child{border-top:0}.q h4{line-height:1.55}.option{display:block;padding:9px 11px;border:1px solid var(--line);border-radius:9px;margin:6px 0;cursor:pointer}.option:hover{background:#fafaff;border-color:#d4d0ff}.option input{margin-right:8px}.answer{background:#f8f8ff;border-left:4px solid var(--accent);padding:11px 13px;border-radius:8px;margin-top:8px;line-height:1.75}.locked{background:#fff9ed;border:1px solid #f6d9a8;padding:12px;border-radius:9px;color:#9a6018}.uploadBox{border:2px dashed #cbd1df;border-radius:14px;padding:22px;text-align:center;background:#fcfcff}.table{width:100%;border-collapse:collapse;background:#fff}.table th,.table td{border-bottom:1px solid var(--line);padding:11px;text-align:left;font-size:12.5px}.table th{background:#fafbfe;color:#596174}.notice{padding:12px 14px;background:#f0f6ff;border:1px solid #c6dcff;border-radius:10px;color:#29599c}.warning{background:#fff9ec;border-color:#f4dda6;color:#8a5b10}.printSheet{background:#fff;padding:24px;border:1px solid var(--line);border-radius:12px}.flow{display:flex;gap:7px;align-items:center;flex-wrap:wrap;background:#fff;border:1px solid var(--line);padding:14px;border-radius:14px}.flow span{background:#efefff;color:#5149d8;padding:6px 9px;border-radius:999px;font-weight:800;font-size:11px}.teacherTip{margin-top:14px;padding:12px;border-radius:10px;background:#f0fbf5;border:1px solid #bfe9d2;color:#146a47}.worked{padding:14px 0;border-top:1px dashed var(--line)}.worked:first-of-type{border-top:0}.worked h4{margin:0 0 8px}.hint{padding:10px 12px;margin:8px 0;background:#f8fafc;border-left:4px solid #8792a5;border-radius:6px}.locked.mini{margin-top:8px;padding:8px;font-size:11.5px}.checkline{display:flex;gap:8px;align-items:flex-start}.writeSpace{height:72px;border-bottom:1px dotted #999;margin-bottom:12px}details{margin-top:8px}summary{cursor:pointer;font-weight:800;color:#5a52dd}.boardControls{gap:10px;flex-wrap:wrap;margin:10px 0}.boardControls select,.row select{min-width:190px}.teacherSteps{padding-left:22px}.teacherSteps li{margin:7px 0}.printQ{break-inside:avoid;margin:12px 0}.printQ .writeSpace{min-height:72px;border-bottom:1px dashed #bbb;margin-top:8px}
.examGrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.examCard{position:relative;overflow:hidden}.examCard .examIcon{font-size:26px;margin-bottom:12px}.examCard h3{margin:0 0 6px}.examCard p{font-size:11.5px;color:var(--muted);min-height:50px;line-height:1.5}.doubtItem{padding:12px 0;border-bottom:1px solid var(--line)}.doubtItem:last-child{border:0}.doubtItem small{color:var(--muted)}textarea,input,select{font:inherit;border:1px solid var(--line);border-radius:9px;padding:9px;background:#fff}textarea{width:100%;min-height:90px}.miniBar{display:flex;gap:6px;flex-wrap:wrap}.miniBar span{font-size:10px;padding:4px 7px;border-radius:999px;background:#f4f5f8;color:#687083}
#toast{position:fixed;right:18px;bottom:18px;z-index:99}
@media(max-width:1120px){.subjectGrid{grid-template-columns:repeat(3,minmax(0,1fr))}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.heroGrid{grid-template-columns:1fr}.playerShell{grid-template-columns:1fr}.playerSide{position:static}.searchBox{display:none}}
@media(max-width:820px){#app{grid-template-columns:1fr}aside{height:auto;position:relative;padding:12px}.brandWrap{border:0;margin:0;padding:5px}.brandWrap+.nav{}nav{display:flex;gap:5px;overflow:auto;padding:8px 0 0}nav button{width:auto;white-space:nowrap}nav button::before{display:none}.asideFoot{display:none}main{padding:0 14px 28px}header{top:0;min-height:74px}.profileChip{display:none}.subjectGrid,.examGrid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding:22px}.hero h2{font-size:23px}.tabs{top:76px}}
@media(max-width:560px){.subjectGrid,.examGrid,.grid{grid-template-columns:1fr}.continueCard{grid-template-columns:54px 1fr}.continueCard>button{grid-column:1/-1}.heroMetric{grid-template-columns:1fr 1fr}.headerActions .iconBtn{display:none}.headerTitle h1{font-size:21px}.playerTop{padding:16px}.table{display:block;overflow:auto}}
@media print{aside,header,#toast,.noPrint,.playerSide{display:none!important}#app{display:block}main{padding:0}.card,.printSheet{box-shadow:none;border:0}.pageBreak{page-break-after:always}.playerShell{display:block}}