:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-soft: #dbeafe;--secondary: #f59e0b;--secondary-soft: #fef3c7;--accent: #ec4899;--accent-soft: #fce7f3;--mint: #10b981;--mint-soft: #d1fae5;--violet: #8b5cf6;--violet-soft: #ede9fe;--bg: #eff6ff;--surface: #ffffff;--muted: #f1f5fd;--border: #e4ecfc;--fg: #0f172a;--fg-soft: #475569;--danger: #dc2626;--radius-lg: 32px;--radius-md: 22px;--radius-sm: 16px;--shadow-clay: 0 10px 20px -8px rgba(37, 99, 235, .25), 0 4px 8px -4px rgba(15, 23, 42, .1), inset 0 -3px 0 rgba(15, 23, 42, .06), inset 0 2px 0 #fff;--shadow-clay-sm: 0 6px 12px -6px rgba(37, 99, 235, .22), inset 0 -2px 0 rgba(15, 23, 42, .06), inset 0 1px 0 #fff;--shadow-pop: 0 18px 32px -12px rgba(37, 99, 235, .32), 0 6px 12px -6px rgba(15, 23, 42, .12);--font-head: "Baloo Bhaijaan 2", "Tajawal", system-ui, sans-serif;--font-body: "Tajawal", "Baloo Bhaijaan 2", system-ui, sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-body);background:var(--bg);color:var(--fg);line-height:1.85;-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,.font-head{font-family:var(--font-head);font-weight:700;line-height:1.45;margin:0}a{color:var(--primary);text-decoration:none}button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}input,select,textarea{font-family:inherit;font-size:1rem}.bg-decor{position:fixed;top:0;right:0;bottom:0;left:0;overflow:hidden;pointer-events:none;z-index:0}.bg-decor span{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5;animation:drift 18s ease-in-out infinite}.bg-decor span:nth-child(1){width:340px;height:340px;background:#bfdbfe;top:-80px;right:-60px}.bg-decor span:nth-child(2){width:300px;height:300px;background:#fde68a;top:40%;left:-100px;animation-delay:-6s}.bg-decor span:nth-child(3){width:260px;height:260px;background:#fbcfe8;bottom:-60px;right:22%;animation-delay:-11s}@keyframes drift{0%,to{transform:translateZ(0) scale(1)}50%{transform:translate3d(-20px,22px,0) scale(1.06)}}.app-shell{position:relative;z-index:1;min-height:100vh;display:flex;flex-direction:column}.container{width:min(1160px,92vw);margin-inline:auto}.page{flex:1;padding:26px 0 60px}.navbar{position:sticky;top:0;z-index:50;background:#ffffffc7;-webkit-backdrop-filter:blur(14px) saturate(160%);backdrop-filter:blur(14px) saturate(160%);border-bottom:1px solid var(--border)}.nav-inner{display:flex;align-items:center;gap:14px;padding:12px 0}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:48px;height:48px;border-radius:18px;flex:none;background:linear-gradient(150deg,#60a5fa,var(--primary-dark));box-shadow:var(--shadow-clay-sm);display:grid;place-items:center;color:#fff}.brand-text{display:flex;flex-direction:column;line-height:1.25}.brand-title{font-family:var(--font-head);font-weight:800;font-size:1.22rem}.brand-sub{font-size:.68rem;color:var(--fg-soft);letter-spacing:.2px}.nav-links{display:flex;gap:6px;margin-inline-start:auto;flex-wrap:wrap}.nav-link{padding:9px 15px;border-radius:14px;font-weight:500;font-size:.95rem;color:var(--fg-soft);transition:all .22s cubic-bezier(.34,1.56,.64,1);display:inline-flex;align-items:center;gap:7px}.nav-link:hover{background:var(--primary-soft);color:var(--primary-dark);transform:translateY(-2px)}.nav-link.active{background:var(--primary);color:#fff;box-shadow:var(--shadow-clay-sm)}.nav-progress{display:inline-flex;align-items:center;gap:6px;background:var(--secondary-soft);color:#92400e;border-radius:14px;padding:7px 12px;font-size:.85rem;font-weight:700}.menu-btn{display:none;margin-inline-start:auto;padding:10px;border-radius:14px;background:var(--muted)}.hero{padding:34px 0 10px}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:30px;align-items:center;background:linear-gradient(160deg,#fff,#f5f9ff 60%,#eef4ff);border:1px solid var(--border);border-radius:40px;padding:40px 38px;box-shadow:var(--shadow-pop);position:relative;overflow:hidden}.pill{display:inline-flex;align-items:center;gap:8px;background:var(--primary-soft);color:var(--primary-dark);border-radius:999px;padding:7px 16px;font-size:.85rem;font-weight:700;margin-bottom:14px}.hero h1{font-size:clamp(2.3rem,5.6vw,3.9rem);font-weight:800;letter-spacing:-.5px;background:linear-gradient(120deg,var(--primary-dark),var(--violet) 55%,var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-sub{font-size:.82rem;color:var(--fg-soft);margin-top:6px;font-weight:500;letter-spacing:.2px}.hero-lead{margin-top:14px;font-size:1.05rem;color:var(--fg-soft);max-width:54ch}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.hero-stats{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.hero-stat{background:#fff;border:1px solid var(--border);border-radius:18px;padding:10px 16px;box-shadow:var(--shadow-clay-sm)}.hero-stat b{font-family:var(--font-head);font-size:1.3rem;color:var(--primary-dark);display:block}.hero-stat small{color:var(--fg-soft);font-size:.78rem}.hero-art{display:grid;place-items:center}.hero-art svg{width:100%;max-width:380px;height:auto;filter:drop-shadow(0 18px 22px rgba(37,99,235,.18))}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 24px;border-radius:18px;font-weight:700;font-family:var(--font-head);font-size:.98rem;transition:all .22s cubic-bezier(.34,1.56,.64,1);box-shadow:var(--shadow-clay-sm)}.btn:hover{transform:translateY(-3px) scale(1.02);box-shadow:var(--shadow-clay)}.btn:active{transform:scale(.95)}.btn-primary{background:linear-gradient(150deg,#3b82f6,var(--primary-dark));color:#fff}.btn-amber{background:linear-gradient(150deg,#fbbf24,#d97706);color:#fff}.btn-pink{background:linear-gradient(150deg,#f472b6,#db2777);color:#fff}.btn-mint{background:linear-gradient(150deg,#34d399,#059669);color:#fff}.btn-ghost{background:#fff;color:var(--fg);border:1px solid var(--border)}.btn-sm{padding:9px 16px;border-radius:14px;font-size:.88rem}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin:40px 0 18px;flex-wrap:wrap}.section-head h2{font-size:clamp(1.5rem,3vw,2rem)}.section-head p{color:var(--fg-soft);margin:4px 0 0;font-size:.95rem}.eyebrow{color:var(--primary);font-weight:700;font-size:.82rem;letter-spacing:1px}.card{background:#ffffffeb;border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-clay);padding:24px}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.unit-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-clay);transition:all .26s cubic-bezier(.34,1.56,.64,1);display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden}.unit-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-pop)}.unit-card:after{content:"";position:absolute;width:120px;height:120px;border-radius:50%;top:-50px;left:-40px;opacity:.16;background:var(--u-color, var(--primary))}.unit-icon{width:58px;height:58px;border-radius:20px;display:grid;place-items:center;background:var(--u-soft, var(--primary-soft));color:var(--u-color, var(--primary));box-shadow:var(--shadow-clay-sm)}.unit-card h3{font-size:1.16rem}.unit-card p{color:var(--fg-soft);font-size:.92rem;margin:0}.chip{display:inline-flex;align-items:center;gap:6px;background:var(--muted);border-radius:999px;padding:5px 12px;font-size:.8rem;color:var(--fg-soft);font-weight:500}.chip-row{display:flex;gap:8px;flex-wrap:wrap}.unit-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto}.bar{height:12px;border-radius:999px;background:var(--muted);overflow:hidden;border:1px solid var(--border)}.bar>span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#34d399,var(--primary));transition:width .6s ease}.bar-amber>span{background:linear-gradient(90deg,#fbbf24,#f97316)}.bar-pink>span{background:linear-gradient(90deg,#f472b6,#db2777)}.stat-tile{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:16px;box-shadow:var(--shadow-clay-sm);text-align:center}.stat-tile b{display:block;font-family:var(--font-head);font-size:1.7rem;color:var(--primary-dark)}.stat-tile small{color:var(--fg-soft);font-size:.8rem}.lesson-layout{display:grid;grid-template-columns:280px 1fr;gap:24px;align-items:start}.side-nav{position:sticky;top:88px;display:flex;flex-direction:column;gap:8px}.side-nav button{text-align:right;padding:12px 14px;border-radius:var(--radius-sm);background:#fff;border:1px solid var(--border);font-size:.9rem;font-weight:500;transition:all .2s ease;display:flex;align-items:center;gap:9px}.side-nav button:hover{transform:translate(-4px);border-color:var(--primary-soft)}.side-nav button.active{background:var(--primary);color:#fff;border-color:transparent;box-shadow:var(--shadow-clay-sm)}.block{margin-bottom:16px}.block-text{font-size:1.02rem;color:#1e293b}.block-title{font-family:var(--font-head);font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:8px}.callout{border-radius:var(--radius-md);padding:16px 18px;border:1px solid var(--border);background:var(--muted)}.callout.rule{background:#eff6ff;border-color:#bfdbfe}.callout.example{background:#f0fdf4;border-color:#bbf7d0}.callout.tip{background:#fffbeb;border-color:#fde68a}.callout.warn{background:#fef2f2;border-color:#fecaca}.formula{font-family:var(--font-head);font-size:1.1rem;background:#fff;border:2px dashed var(--primary-soft);border-radius:18px;padding:12px 16px;text-align:center;color:var(--primary-dark);font-weight:700;direction:ltr;unicode-bidi:embed}.example-box{background:#fff;border:1px solid var(--border);border-radius:18px;padding:14px}.quiz-wrap{display:grid;gap:16px}.q-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-clay)}.q-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}.q-num{width:34px;height:34px;flex:none;border-radius:12px;background:var(--primary-soft);color:var(--primary-dark);display:grid;place-items:center;font-weight:800;font-family:var(--font-head)}.q-text{font-weight:600;font-size:1.06rem}.options{display:grid;gap:10px;margin-top:14px}.option{display:flex;align-items:center;gap:12px;padding:13px 16px;border-radius:18px;border:1px solid var(--border);background:#fff;text-align:right;font-size:.98rem;transition:all .2s cubic-bezier(.34,1.56,.64,1);width:100%}.option:hover{transform:translateY(-2px);border-color:var(--primary-soft);background:#f8fbff}.option .key{width:30px;height:30px;flex:none;border-radius:10px;background:var(--muted);display:grid;place-items:center;font-weight:700;color:var(--fg-soft);font-size:.85rem}.option.correct{background:#ecfdf5;border-color:#6ee7b7}.option.correct .key{background:var(--mint);color:#fff}.option.wrong{background:#fef2f2;border-color:#fca5a5}.option.wrong .key{background:var(--danger);color:#fff}.option.selected{border-color:var(--primary);background:#eff6ff}.option:disabled{cursor:default}.option:disabled:hover{transform:none}.feedback{margin-top:14px;border-radius:18px;padding:13px 16px;font-size:.93rem;display:flex;gap:10px}.feedback.ok{background:#ecfdf5;color:#065f46}.feedback.no{background:#fef2f2;color:#991b1b}.quiz-result{text-align:center;padding:30px}.score-ring{width:150px;height:150px;margin:0 auto 16px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--primary) var(--pct),var(--muted) 0);box-shadow:var(--shadow-clay)}.score-ring>div{width:118px;height:118px;border-radius:50%;background:#fff;display:grid;place-items:center}.score-ring b{font-family:var(--font-head);font-size:2rem;color:var(--primary-dark)}.activity-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-clay);display:flex;flex-direction:column;gap:10px;transition:all .26s cubic-bezier(.34,1.56,.64,1)}.activity-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-pop)}.tile-pool{display:flex;gap:10px;flex-wrap:wrap}.tile{min-width:62px;padding:12px 16px;border-radius:16px;background:#fff;border:2px solid var(--border);font-family:var(--font-head);font-weight:700;font-size:1.05rem;box-shadow:var(--shadow-clay-sm);transition:all .2s cubic-bezier(.34,1.56,.64,1)}.tile:hover{transform:translateY(-3px);border-color:var(--primary)}.tile.used{opacity:.35}.tile.selected{border-color:var(--accent);background:var(--accent-soft)}.slot-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.slot{min-width:74px;min-height:56px;border-radius:16px;border:2px dashed #bfdbfe;background:#f8fbff;display:grid;place-items:center;font-family:var(--font-head);font-weight:800;font-size:1.15rem;padding:6px 10px}.slot small{display:block;font-size:.68rem;color:var(--fg-soft);font-weight:500;font-family:var(--font-body)}.slot.filled{border-style:solid;border-color:var(--primary);background:#fff;color:var(--primary-dark)}.slot.drop-hint{animation:pulse 1.4s infinite}@keyframes pulse{0%,to{box-shadow:0 0 #2563eb59}50%{box-shadow:0 0 0 10px #2563eb00}}.bin{border:2px dashed var(--border);border-radius:var(--radius-md);padding:14px;min-height:110px;background:#f8fbff;transition:all .2s ease}.bin.hot{border-color:var(--primary);background:#eff6ff}.bin h4{font-size:.95rem;margin-bottom:8px;color:var(--primary-dark)}.sort-pill{display:block;width:100%;text-align:right;padding:10px 13px;border-radius:14px;background:#fff;border:1px solid var(--border);margin-bottom:7px;font-size:.92rem;box-shadow:var(--shadow-clay-sm);transition:all .2s ease}.sort-pill:hover{transform:translate(-4px)}.grid-canvas{display:grid;gap:2px;background:#dbeafe;border-radius:14px;padding:6px;touch-action:none}.grid-cell{background:#fff;border-radius:4px;aspect-ratio:1;cursor:pointer;transition:background .15s ease}.grid-cell:hover{background:#eff6ff}.grid-cell.on{background:var(--primary)}.numline{position:relative;height:74px}.numline input[type=range]{width:100%;accent-color:var(--primary);height:34px}.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:.85rem;color:var(--fg-soft)}.swatch{display:inline-block;width:14px;height:14px;border-radius:5px;margin-inline-end:6px;vertical-align:-2px}.chart{display:flex;align-items:flex-end;gap:16px;height:210px;padding:14px;background:#f8fbff;border-radius:var(--radius-md);border:1px solid var(--border)}.chart-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:8px;height:100%;justify-content:flex-end}.chart-bar{width:100%;border-radius:12px 12px 6px 6px;background:linear-gradient(180deg,#60a5fa,var(--primary-dark));transition:height .6s cubic-bezier(.34,1.56,.64,1);box-shadow:var(--shadow-clay-sm)}.chart-label{font-size:.8rem;color:var(--fg-soft)}.chart-val{font-weight:700;font-family:var(--font-head);color:var(--primary-dark);font-size:.95rem}table.data{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;font-size:.93rem}table.data th{background:var(--primary-soft);color:var(--primary-dark);padding:11px 13px;text-align:right;font-weight:700}table.data td{padding:10px 13px;border-top:1px solid var(--border);background:#fff}table.data tr:nth-child(2n) td{background:#fafcff}.toast-wrap{position:fixed;bottom:24px;inset-inline-start:24px;z-index:90;display:flex;flex-direction:column;gap:10px}.toast{background:#fff;border:1px solid var(--border);border-inline-start:6px solid var(--primary);border-radius:18px;padding:12px 18px;box-shadow:var(--shadow-pop);font-weight:600;font-size:.92rem;animation:popIn .35s cubic-bezier(.34,1.56,.64,1);max-width:340px}.toast.ok{border-inline-start-color:var(--mint)}.toast.err{border-inline-start-color:var(--danger)}@keyframes popIn{0%{transform:translateY(18px) scale(.9);opacity:0}to{transform:none;opacity:1}}.footer{background:#0f172a;color:#cbd5e1;margin-top:50px;padding:34px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:26px}.footer h4{color:#fff;font-size:1rem;margin-bottom:10px}.footer a{color:#cbd5e1;display:block;padding:3px 0;font-size:.9rem;transition:color .2s ease}.footer a:hover{color:#fff}.footer .credit{border-top:1px solid #1e293b;margin-top:24px;padding-top:16px;font-size:.78rem;color:#94a3b8;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.small-credit{font-size:.72rem;color:var(--fg-soft);letter-spacing:.2px}.skel{border-radius:var(--radius-md);background:linear-gradient(90deg,#eef4ff 25%,#e2ebfb 37%,#eef4ff 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite}@keyframes shimmer{0%{background-position:100% 0}to{background-position:0 0}}.fade-up{animation:fadeUp .5s ease both}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}.d1{animation-delay:.06s}.d2{animation-delay:.12s}.d3{animation-delay:.18s}.d4{animation-delay:.24s}@media (max-width: 1024px){.hero-grid{grid-template-columns:1fr;padding:30px 24px}.hero-art{order:-1}.lesson-layout{grid-template-columns:1fr}.side-nav{position:static;flex-direction:row;overflow-x:auto;padding-bottom:6px}.side-nav button{white-space:nowrap}.footer-grid{grid-template-columns:1fr 1fr}}@media (max-width: 760px){.grid-3,.grid-2{grid-template-columns:1fr}.nav-links{display:none}.nav-links.open{display:flex;flex-direction:column;position:absolute;inset-inline:12px;top:70px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:12px;box-shadow:var(--shadow-pop)}.menu-btn{display:block}.footer-grid{grid-template-columns:1fr}.chart{gap:8px}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}