:root{--bg:#f5f7fb;--surface:#fff;--surface-soft:#f8fafc;--surface-blue:#f4f7ff;--text:#172033;--muted:#697386;--muted-2:#8a94a6;--line:#e5e9f0;--line-strong:#d9e0ea;--brand:#5b5ce2;--brand-dark:#4748c9;--brand-soft:#eeefff;--blue:#2d6cdf;--cyan:#0e9f9a;--green:#148f5c;--green-soft:#eaf8f1;--amber:#b7791f;--amber-soft:#fff7e8;--red:#c94a5b;--red-soft:#fff0f2;--sidebar:264px;--topbar:72px;--radius:18px;--radius-sm:12px;--shadow:0 10px 30px rgba(18,38,63,.07);--shadow-lg:0 18px 50px rgba(18,38,63,.11);--font:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI","Noto Sans Bengali","Helvetica Neue",Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}.hidden{display:none!important}.mobile-only{display:none}.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar);z-index:40;padding:18px 14px 16px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;overflow-y:auto}.brand{display:flex;align-items:center;gap:11px;padding:2px 7px 16px;color:var(--text);text-decoration:none}.brand-mark{width:43px;height:43px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(145deg,#6263e9,#4c4dd2);box-shadow:0 8px 18px rgba(91,92,226,.22);color:#fff;font-size:14px;font-weight:900;letter-spacing:.3px}.brand-copy strong{display:block;font-size:19px;line-height:1.15;letter-spacing:-.3px}.brand-copy small{display:block;margin-top:4px;color:var(--muted-2);font-size:9px;font-weight:800;letter-spacing:.95px}.journey-chip{display:flex;align-items:center;gap:10px;margin:0 4px 18px;padding:11px 12px;border:1px solid #e3e5ff;border-radius:14px;background:linear-gradient(135deg,#f6f6ff,#fbfbff)}.journey-icon{width:35px;height:35px;border-radius:11px;display:grid;place-items:center;background:var(--brand);color:#fff;font-size:11px;font-weight:900}.journey-chip small,.journey-chip strong{display:block}.journey-chip small{color:var(--muted-2);font-size:10px}.journey-chip strong{font-size:12px}.nav-label{margin:12px 11px 6px;color:#a2aabd;font-size:9px;font-weight:900;letter-spacing:1.2px}.side-nav{display:flex;flex-direction:column;gap:3px}.side-nav a{display:flex;align-items:center;gap:10px;min-height:40px;padding:8px 10px;border-radius:11px;color:#5f6879;text-decoration:none;font-size:12.5px;font-weight:650;transition:.16s}.side-nav a:hover{background:#f6f7fb;color:#2f3746}.side-nav a.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:800}.nav-icon{width:25px;height:25px;flex:0 0 25px;display:grid;place-items:center;border-radius:8px;color:#7f899c;font-size:12px;font-weight:900}.side-nav a.active .nav-icon{background:#fff;color:var(--brand);box-shadow:0 2px 8px rgba(91,92,226,.11)}.sidebar-footer{margin-top:auto;padding:18px 5px 0;border-top:1px solid var(--line)}.sidebar-footer p{margin:10px 2px 0;text-align:center;color:var(--muted-2);font-size:10px}.sidebar-backdrop{display:none}.topbar{position:fixed;z-index:30;left:var(--sidebar);right:0;top:0;height:var(--topbar);display:flex;align-items:center;justify-content:space-between;padding:0 30px;background:rgba(255,255,255,.92);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.topbar-left,.topbar-actions{display:flex;align-items:center;gap:12px}.page-heading strong,.page-heading small{display:block}.page-heading strong{font-size:15px;letter-spacing:-.15px}.page-heading small{margin-top:2px;color:var(--muted-2);font-size:10.5px}.status-dot{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:11px;font-weight:700}.status-dot i{width:7px;height:7px;border-radius:50%;background:#22a06b;box-shadow:0 0 0 3px #e7f7ef}.status-dot.offline i{background:#d08a20;box-shadow:0 0 0 3px #fff2d9}.menu-btn{width:40px;height:40px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--text);cursor:pointer}.btn{min-height:39px;display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:8px 13px;border:1px solid var(--line-strong);border-radius:11px;background:#fff;color:#374151;text-decoration:none;font-weight:750;font-size:12px;cursor:pointer;transition:.16s;box-shadow:0 1px 2px rgba(17,24,39,.02)}.btn:hover{border-color:#cfd6e2;background:#fafbfc;transform:translateY(-1px)}.btn-primary{border-color:var(--brand);background:var(--brand);color:#fff;box-shadow:0 7px 16px rgba(91,92,226,.18)}.btn-primary:hover{border-color:var(--brand-dark);background:var(--brand-dark)}.btn-good{border-color:#b9e3cd;background:var(--green-soft);color:var(--green)}.btn-danger{border-color:#f0c6cd;background:var(--red-soft);color:var(--red)}.btn-block{width:100%}.practice-btn{padding-inline:17px}main{margin-left:var(--sidebar);padding:calc(var(--topbar) + 26px) 30px 60px;max-width:1600px;min-height:100vh}.hero{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(260px,.55fr);gap:16px}.hero-card,.panel,.stat,.word-card,.question-card,.mission-card,.mistake,.empty{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 1px 2px rgba(17,24,39,.02)}.hero-card{padding:34px}.hero-card:first-child{position:relative;overflow:hidden;background:linear-gradient(135deg,#fff 0%,#fafaff 52%,#f4f5ff 100%)}.hero-card:first-child:after{content:"";position:absolute;width:260px;height:260px;right:-85px;top:-100px;border-radius:50%;background:radial-gradient(circle,rgba(91,92,226,.16),rgba(91,92,226,0) 70%);pointer-events:none}.hero h1{max-width:760px;margin:12px 0 14px;font-size:clamp(34px,4.8vw,61px);line-height:1.02;letter-spacing:-2.6px;color:#151d2e}.gradient-text{background:linear-gradient(100deg,#5556d8,#7b61d1);-webkit-background-clip:text;background-clip:text;color:transparent}.eyebrow{color:var(--brand);font-size:10px;font-weight:900;letter-spacing:1.45px;text-transform:uppercase}.pron{color:#4f6e91;font-weight:650}.bn{color:#5f6b7d}.meaning{margin-top:3px;color:#394a5f;font-weight:650}.muted{color:var(--muted)}.hero-actions,.row-actions,.word-actions,.filters{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.hero-actions{margin:22px 0 18px}.callout{margin-top:16px;padding:13px 14px;border:1px solid #dde3f7;border-left:3px solid var(--brand);border-radius:12px;background:#f8f9ff;color:#4a5568}.hero-score{display:flex;flex-direction:column;justify-content:center;min-height:100%}.ring{--p:0%;width:158px;height:158px;margin:0 auto 20px;border-radius:50%;display:grid;place-items:center;position:relative;background:conic-gradient(var(--brand) var(--p),#eceef5 0)}.ring:after{content:"";position:absolute;inset:12px;border-radius:50%;background:#fff;box-shadow:inset 0 0 0 1px var(--line)}.ring div{z-index:1;text-align:center}.ring strong{display:block;font-size:36px;line-height:1;color:#20283a;letter-spacing:-1.5px}.ring small{display:block;margin-top:5px;color:var(--muted-2);font-size:10px;font-weight:800;text-transform:uppercase;letter-spacing:.7px}.grid{display:grid;gap:14px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.stats{margin:16px 0}.stat{padding:17px 18px}.stat small{display:block;color:var(--muted-2);font-size:10px;font-weight:750}.stat strong{display:block;margin:4px 0 2px;font-size:25px;line-height:1.2;letter-spacing:-.8px}.stat .bn{font-size:11px}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;margin:30px 0 12px}.section-head h2{margin:0;font-size:20px;letter-spacing:-.45px}.section-head p{margin:4px 0 0;color:var(--muted);font-size:12px}.panel{padding:18px}.panel h2,.panel h3,.panel h4{margin-top:0}.panel h3{font-size:15px}.mission-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.mission-card{padding:14px;text-align:left;cursor:pointer;transition:.16s}.mission-card:hover{border-color:#d9dcf7;box-shadow:0 7px 20px rgba(37,45,75,.06);transform:translateY(-1px)}.mission-card small,.mission-card b,.mission-card span{display:block}.mission-card small{color:var(--muted-2);font-size:9.5px}.mission-card b{margin:3px 0;font-size:12px}.mission-card span{color:var(--muted);font-size:10px}.mission-card.done{border-color:#cce8db;background:#f7fcf9}.mission-card.done span{color:var(--green);font-weight:800}.progress{height:7px;border-radius:999px;background:#eef1f5;overflow:hidden}.progress span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#5b5ce2,#7778eb)}.day-grid{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:7px}.day-btn{aspect-ratio:1;min-height:34px;border:1px solid var(--line);border-radius:10px;background:#fff;color:#737d90;font-size:11px;font-weight:800;cursor:pointer}.day-btn:hover{border-color:#cdd1f5}.day-btn.current{border-color:var(--brand);background:var(--brand);color:#fff;box-shadow:0 5px 12px rgba(91,92,226,.17)}.day-btn.done{border-color:#bfe4d1;background:var(--green-soft);color:var(--green)}.day-btn.done.current{border-color:var(--brand);background:var(--brand);color:#fff}.sticky-tools{position:sticky;top:calc(var(--topbar) + 8px);z-index:10;margin-bottom:12px;padding:9px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);box-shadow:0 6px 20px rgba(24,39,75,.05)}.input,.select,.textarea,input,select,textarea{width:100%;min-height:40px;padding:9px 11px;border:1px solid var(--line-strong);border-radius:11px;background:#fff;color:var(--text);outline:none;transition:.16s}.input:focus,.select:focus,.textarea:focus,input:focus,select:focus,textarea:focus{border-color:#9d9ef0;box-shadow:0 0 0 3px rgba(91,92,226,.09)}.filters .input{max-width:360px}.filters .select{width:auto;min-width:145px}.textarea,textarea{min-height:145px;resize:vertical}.word-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}.word-card{padding:17px;transition:.16s}.word-card:hover{border-color:#d9dcf6;box-shadow:var(--shadow);transform:translateY(-1px)}.word-card.learned{border-color:#bfe4d1;background:linear-gradient(180deg,#fff,#fbfefc)}.word-card h3{margin:8px 0 2px;font-size:20px;letter-spacing:-.35px}.word-card p{margin:9px 0;color:#586476;font-size:12px}.word-card .bn{font-size:11px}.word-actions{margin-top:13px}.tag{display:inline-flex;align-items:center;min-height:23px;padding:2px 8px;border:1px solid #dde1ea;border-radius:999px;background:#fafbfc;color:#6e788b;font-size:9px;font-weight:800}.lesson,.split{display:grid;grid-template-columns:1.05fr .95fr;gap:14px}.lesson-example{margin-top:16px;padding:15px;border:1px solid #e6e8f4;border-radius:13px;background:#fafaff}.quiz-option{display:flex;width:100%;justify-content:flex-start;margin:7px 0;text-align:left}.quiz-option.correct{border-color:#8ed0ae;background:var(--green-soft);color:var(--green)}.quiz-option.wrong{border-color:#e6aab3;background:var(--red-soft);color:var(--red)}.score-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:15px 0}.score-box{padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--surface-soft);text-align:center}.score-box small,.score-box strong{display:block}.score-box small{color:var(--muted-2);font-size:9.5px}.score-box strong{margin-top:3px;font-size:20px}.chat{height:390px;overflow:auto;padding:13px;border:1px solid var(--line);border-radius:14px;background:#f8fafc}.bubble{max-width:87%;margin:8px 0;padding:10px 12px;border-radius:14px;white-space:pre-wrap;font-size:12px}.bubble.ai{background:#fff;border:1px solid var(--line)}.bubble.user{margin-left:auto;background:var(--brand);color:#fff;box-shadow:0 5px 12px rgba(91,92,226,.14)}.chat-compose{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;margin-top:9px}.chat-compose textarea{min-height:64px}.question-card{margin-bottom:9px;overflow:hidden}.question-card summary{position:relative;padding:15px 44px 15px 16px;cursor:pointer;list-style:none;font-weight:800;line-height:1.5}.question-card summary::-webkit-details-marker{display:none}.question-card summary:after{content:"+";position:absolute;right:17px;top:50%;transform:translateY(-50%);width:24px;height:24px;display:grid;place-items:center;border-radius:8px;background:#f4f5f8;color:#7a8496}.question-card[open] summary:after{content:"−"}.question-card summary .tag{margin-right:5px}.answer-box{padding:16px;border-top:1px solid var(--line);background:#fbfcfe}.answer-box p{color:#4f5b6d}.mistake{margin:10px 0;padding:15px}.empty{padding:28px;text-align:center;color:var(--muted)}.bar-row{display:grid;grid-template-columns:150px minmax(0,1fr) 42px;gap:9px;align-items:center;margin:10px 0;font-size:11px}.bar-row b{text-align:right}.certificate{padding:36px;border:2px solid #d6d9ee;border-radius:20px;background:linear-gradient(135deg,#fff,#f7f7ff);text-align:center;box-shadow:var(--shadow-lg)}#toast{position:fixed;right:20px;bottom:22px;z-index:100;max-width:320px;padding:11px 14px;border-radius:11px;background:#20283a;color:#fff;box-shadow:0 12px 30px rgba(17,24,39,.18);opacity:0;transform:translateY(10px);pointer-events:none;transition:.2s;font-size:12px}#toast.show{opacity:1;transform:none}.bottom-nav{display:none}@media(max-width:1120px){.mission-list,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.word-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.day-grid{grid-template-columns:repeat(6,minmax(0,1fr))}}@media(max-width:820px){:root{--sidebar:0px;--topbar:64px}.mobile-only{display:flex}.sidebar{width:278px;transform:translateX(-102%);transition:transform .22s ease;box-shadow:18px 0 50px rgba(17,24,39,.14)}.sidebar.open{transform:translateX(0)}.sidebar-backdrop{position:fixed;inset:0;z-index:35;border:0;background:rgba(24,32,48,.32);backdrop-filter:blur(2px);opacity:0;pointer-events:none;display:block;transition:.2s}.sidebar.open+.sidebar-backdrop{opacity:1;pointer-events:auto}.topbar{left:0;padding:0 14px}.page-heading small,.status-dot{display:none}.practice-btn{display:none}.menu-btn{display:grid;place-items:center}.topbar-left{gap:10px}main{margin:0;padding:calc(var(--topbar) + 16px) 13px 88px}.hero,.lesson,.split,.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.hero-card{padding:24px}.hero h1{font-size:38px;letter-spacing:-1.7px}.hero-score{display:grid;grid-template-columns:130px 1fr;align-items:center;gap:14px}.ring{width:125px;height:125px;margin:0}.ring strong{font-size:29px}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.mission-list{grid-template-columns:repeat(2,minmax(0,1fr))}.word-grid{grid-template-columns:1fr}.section-head{align-items:flex-start;margin-top:23px}.section-head>div:last-child:not(:first-child){white-space:nowrap}.sticky-tools{top:calc(var(--topbar) + 4px)}.filters{align-items:stretch}.filters .input,.filters .select{max-width:none;width:100%}.score-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.day-grid{grid-template-columns:repeat(6,minmax(0,1fr))}.bottom-nav{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:10px;right:10px;bottom:max(8px,env(safe-area-inset-bottom));z-index:32;padding:5px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.96);box-shadow:0 10px 35px rgba(17,24,39,.14);backdrop-filter:blur(14px)}.bottom-nav a{display:flex;min-height:49px;flex-direction:column;align-items:center;justify-content:center;gap:1px;border-radius:11px;color:#7a8496;text-decoration:none}.bottom-nav a span{font-size:15px;font-weight:900}.bottom-nav a small{font-size:8px;font-weight:750}.bottom-nav a.active{background:var(--brand-soft);color:var(--brand)}#toast{left:14px;right:14px;bottom:78px;max-width:none;text-align:center}.bar-row{grid-template-columns:115px minmax(0,1fr) 37px}}@media(max-width:520px){body{font-size:13px}.hero-card{padding:20px}.hero h1{font-size:34px}.hero-score{grid-template-columns:105px 1fr}.ring{width:102px;height:102px}.ring:after{inset:9px}.ring strong{font-size:24px}.stats{gap:9px}.stat{padding:14px}.stat strong{font-size:21px}.mission-list{grid-template-columns:1fr 1fr;gap:8px}.mission-card{padding:12px}.panel{padding:15px}.section-head{gap:10px}.section-head h2{font-size:18px}.day-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.chat-compose{grid-template-columns:1fr}.chat-compose .btn{width:100%}.bar-row{grid-template-columns:1fr 46px}.bar-row .progress{grid-column:1/-1;grid-row:2}.word-actions,.row-actions{align-items:stretch}.word-actions .btn,.row-actions .btn{flex:1}.certificate{padding:24px 16px}}@media print{.sidebar,.topbar,.bottom-nav,.sidebar-backdrop,.btn,.sticky-tools{display:none!important}main{margin:0;padding:0}.panel,.hero-card,.stat,.question-card{box-shadow:none;break-inside:avoid}body{background:#fff}}

/* v2.4 Professional Practice Modules */
.practice-detail{padding:0;overflow:hidden}.practice-detail>summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:20px}.practice-detail>summary::-webkit-details-marker{display:none}.practice-detail>summary span:first-child{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.practice-body{border-top:1px solid var(--line,#e6eaf2);padding:20px}.phrase-card{position:relative;display:grid;gap:5px;padding:13px 76px 13px 14px;margin:8px 0;border:1px solid var(--line,#e6eaf2);border-radius:12px;background:#f8fafc}.phrase-card .mini-btn{position:absolute;right:10px;top:10px;border:0;background:#fff;border-radius:9px;padding:7px 9px;cursor:pointer}.model-answer{padding:16px;border:1px solid #dfe5f1;border-radius:14px;background:#f8fafc;line-height:1.7;white-space:pre-wrap}.writing-structure{display:grid;gap:4px;margin:12px 0 14px;padding:12px 14px;border-radius:12px;background:#eef2ff;color:#29336d}.writing-card{text-align:left;cursor:pointer;width:100%}.writing-card:hover{transform:translateY(-2px)}.writing-card small{display:block;color:var(--muted,#687386);margin-top:10px}.field-label{display:block;font-weight:700;margin-bottom:7px}.check-list li,.logic-list li{margin:8px 0;line-height:1.55}.framework-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:16px 0 20px}.framework-strip>div{padding:14px;border:1px solid #dfe5f1;border-radius:14px;background:#fff;display:grid;gap:4px}.framework-strip span{font-size:12px;color:var(--muted,#687386)}.business-builder{margin-bottom:18px}.business-case .answer-box ul,.business-case .answer-box ol{padding-left:22px}.business-case .answer-box li{margin:7px 0;line-height:1.55}@media(max-width:900px){.framework-strip{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.framework-strip{grid-template-columns:1fr}.practice-detail>summary,.practice-body{padding:15px}.phrase-card{padding-right:14px}.phrase-card .mini-btn{position:static;width:max-content;margin-top:5px}.writing-card{padding:16px}}