@import"https://fonts.googleapis.com/css2?family=Noto+Naskh+Arabic:wght@400;500;600;700&family=Noto+Sans+Arabic:wght@300;400;500;700&display=swap";:root{--bg: #EFF6FF;--bg-deep: #E3EEFE;--surface: #FFFFFF;--card: #F9FBFF;--primary: #2563EB;--primary-soft: #DBEAFE;--primary-deep: #1D4ED8;--secondary: #F59E0B;--secondary-soft: #FEF3C7;--accent: #EC4899;--accent-soft: #FCE7F3;--violet: #7C3AED;--violet-soft: #EDE9FE;--text: #0F172A;--muted: #5A6B87;--border: #E1EAF9;--border-strong: #C9DAF4;--success: #16A34A;--success-soft: #DCFCE7;--danger: #DC2626;--danger-soft: #FEE2E2;--radius-sm: 14px;--radius: 20px;--radius-lg: 28px;--clay: 0 10px 26px rgba(37, 99, 235, .1), inset 0 -5px 10px rgba(37, 99, 235, .05), inset 0 2px 1px #fff;--clay-hover: 0 16px 36px rgba(37, 99, 235, .16), inset 0 -5px 10px rgba(37, 99, 235, .05), inset 0 2px 1px #fff;--font-body: "Noto Sans Arabic", system-ui, -apple-system, sans-serif;--font-display: "Noto Naskh Arabic", "Noto Sans Arabic", serif}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100dvh;font-family:var(--font-body);color:var(--text);background:radial-gradient(circle at 12% 4%,#DBEAFE 0%,transparent 38%),radial-gradient(circle at 88% 0%,#FCE7F3 0%,transparent 32%),var(--bg);-webkit-font-smoothing:antialiased;line-height:1.7}h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}h1,h2{font-family:var(--font-display)}p{margin:0}button{font-family:inherit}a{color:inherit;text-decoration:none}.math{direction:ltr;unicode-bidi:isolate;display:inline-block;font-feature-settings:"ss01";letter-spacing:.3px;white-space:nowrap}.shell{max-width:1180px;margin:0 auto;padding:0 1.25rem}.stack{display:flex;flex-direction:column}.row{display:flex;align-items:center}.gap-sm{gap:.5rem}.gap{gap:1rem}.gap-lg{gap:1.75rem}.between{justify-content:space-between}.wrap{flex-wrap:wrap}.muted{color:var(--muted)}.small{font-size:.86rem}.center{text-align:center}.nav{position:sticky;top:0;z-index:40;background:#eff6ffd1;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid rgba(201,218,244,.7)}.nav-inner{max-width:1180px;margin:0 auto;padding:.7rem 1.25rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}.brand{display:flex;align-items:center;gap:.65rem;cursor:pointer}.brand-mark{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),#60A5FA);color:#fff;box-shadow:0 8px 18px #2563eb47}.brand-title{font-family:var(--font-display);font-size:1.2rem;font-weight:700;line-height:1.1}.brand-sub{font-size:.72rem;color:var(--muted)}.nav-links{display:flex;align-items:center;gap:.3rem}.nav-link{border:none;background:transparent;cursor:pointer;padding:.5rem .85rem;border-radius:999px;font-size:.9rem;font-weight:500;color:var(--muted);transition:background .2s,color .2s,transform .2s}.nav-link:hover{background:#fff;color:var(--primary-deep);transform:translateY(-1px)}.nav-link.active{background:#fff;color:var(--primary-deep);box-shadow:var(--clay)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;padding:.7rem 1.35rem;border-radius:999px;border:none;font-size:.92rem;font-weight:700;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s}.btn:active{transform:translateY(1px) scale(.995)}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 22px #2563eb47}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px #2563eb57}.btn-secondary{background:var(--secondary);color:#3b2503;box-shadow:0 10px 22px #f59e0b47}.btn-secondary:hover{transform:translateY(-2px)}.btn-ghost{background:#fff;color:var(--primary-deep);border:2px solid var(--border-strong)}.btn-ghost:hover{transform:translateY(-2px);background:var(--primary-soft)}.btn-sm{padding:.45rem .9rem;font-size:.82rem}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.card{background:var(--surface);border:3px solid #fff;border-radius:var(--radius-lg);box-shadow:var(--clay);padding:1.5rem;transition:transform .22s ease,box-shadow .22s ease}.card-hover:hover{transform:translateY(-4px);box-shadow:var(--clay-hover)}.card-soft{background:var(--card);border-color:#eff5ff}.badge{display:inline-flex;align-items:center;gap:.3rem;font-size:.74rem;font-weight:700;padding:.25rem .7rem;border-radius:999px;background:var(--primary-soft);color:var(--primary-deep)}.badge-amber{background:var(--secondary-soft);color:#92400e}.badge-violet{background:var(--violet-soft);color:#5b21b6}.badge-green{background:var(--success-soft);color:#15803d}.badge-pink{background:var(--accent-soft);color:#9d174d}.bar{height:10px;border-radius:999px;background:var(--bg-deep);overflow:hidden}.bar>span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#60A5FA,var(--primary));transition:width .6s ease}.hero{padding:3.2rem 0 1.5rem;display:grid;grid-template-columns:1.15fr .85fr;gap:2rem;align-items:center}.hero h1{font-size:clamp(1.9rem,3.6vw,2.9rem);margin-bottom:.9rem}.hero .lead{color:var(--muted);font-size:1.02rem;max-width:46ch;margin-bottom:1.4rem}.hero-actions{display:flex;gap:.7rem;flex-wrap:wrap}.hero-card{padding:1.35rem}.hero-stat{display:flex;align-items:center;justify-content:space-between;padding:.55rem 0;border-bottom:1px dashed var(--border)}.hero-stat:last-child{border-bottom:none}.hero-stat strong{font-size:1.35rem;font-family:var(--font-display)}.eyebrow{display:inline-flex;align-items:center;gap:.4rem;font-size:.78rem;font-weight:700;color:var(--primary-deep);background:#fff;padding:.3rem .8rem;border-radius:999px;box-shadow:var(--clay);margin-bottom:.9rem}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;margin:2.2rem 0 1rem;flex-wrap:wrap}.section-head h2{font-size:1.55rem}.section-head p{color:var(--muted);font-size:.92rem}.grid{display:grid;gap:1.1rem}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-auto{grid-template-columns:repeat(auto-fill,minmax(255px,1fr))}.level-card{position:relative;overflow:hidden}.level-card .flag{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;color:#fff;font-weight:700;margin-bottom:.8rem}.level-card h3{font-size:1.15rem;margin-bottom:.2rem}.level-card .tagline{font-size:.8rem;font-weight:700;margin-bottom:.5rem}.level-card p{color:var(--muted);font-size:.88rem;margin-bottom:.9rem}.level-card.selected{outline:3px solid var(--primary);outline-offset:3px}.step-card{display:flex;gap:.9rem;align-items:flex-start}.step-num{flex:0 0 34px;width:34px;height:34px;border-radius:12px;background:var(--primary-soft);color:var(--primary-deep);display:grid;place-items:center;font-weight:700}.unit-card{cursor:pointer;display:flex;flex-direction:column;gap:.55rem}.unit-card .unit-top{display:flex;align-items:center;gap:.7rem}.unit-icon{width:46px;height:46px;border-radius:15px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary-deep)}.unit-card h3{font-size:1.02rem}.unit-card .sub{font-size:.8rem;color:var(--muted)}.unit-meta{display:flex;align-items:center;justify-content:space-between;font-size:.78rem;color:var(--muted);margin-top:.3rem}.stat-tile{text-align:center;padding:1.1rem .8rem}.stat-tile strong{display:block;font-size:1.7rem;font-family:var(--font-display);color:var(--primary-deep)}.stat-tile span{font-size:.8rem;color:var(--muted)}.footer{margin-top:3rem;padding:1.6rem 0 2.2rem;border-top:1px solid var(--border);color:var(--muted);font-size:.82rem}.footer-inner{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}.lesson-head{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:1rem}.lesson-head h1{font-size:1.7rem}.crumbs{font-size:.8rem;color:var(--muted);margin-bottom:.35rem}.tabs{display:inline-flex;gap:.3rem;background:#fff;padding:.35rem;border-radius:999px;box-shadow:var(--clay);flex-wrap:wrap}.tab{border:none;background:transparent;cursor:pointer;padding:.5rem 1.05rem;border-radius:999px;font-size:.88rem;font-weight:700;color:var(--muted);transition:all .2s}.tab:hover{color:var(--primary-deep)}.tab.active{color:#fff;background:var(--primary);box-shadow:0 8px 18px #2563eb4d}.panel{display:grid;grid-template-columns:1fr;gap:1rem;margin-top:1.1rem}.rule-list{display:flex;flex-direction:column;gap:.5rem;margin:.8rem 0}.rule{background:var(--card);border:2px dashed var(--border-strong);border-radius:var(--radius-sm);padding:.55rem .9rem;font-size:1rem;text-align:center}.example{background:linear-gradient(180deg,#f0f7ff,#fff);border:2px solid var(--primary-soft);border-radius:var(--radius);padding:1.1rem}.ex-step{display:flex;gap:.6rem;padding:.35rem 0;font-size:.92rem}.ex-step .dot{flex:0 0 22px;width:22px;height:22px;border-radius:8px;background:var(--primary-soft);color:var(--primary-deep);font-size:.72rem;font-weight:700;display:grid;place-items:center;margin-top:.15rem}.ex-answer{margin-top:.6rem;padding-top:.6rem;border-top:1px dashed var(--border-strong);font-weight:700;color:var(--primary-deep)}.q-card{background:#fff;border:3px solid #fff;border-radius:var(--radius);box-shadow:var(--clay);padding:1.2rem}.q-top{display:flex;align-items:center;justify-content:space-between;gap:.6rem;margin-bottom:.6rem}.q-text{font-size:1.02rem;font-weight:600;margin-bottom:.85rem}.opts{display:grid;gap:.55rem}.opt{display:flex;align-items:center;gap:.65rem;text-align:right;background:var(--card);border:2px solid var(--border);border-radius:var(--radius-sm);padding:.65rem .9rem;font-size:.95rem;cursor:pointer;transition:all .18s}.opt:hover:not(:disabled){border-color:var(--primary);background:#f0f7ff;transform:translateY(-1px)}.opt:disabled{cursor:default}.opt .letter{width:26px;height:26px;flex:0 0 26px;border-radius:9px;background:#fff;border:1px solid var(--border-strong);display:grid;place-items:center;font-size:.78rem;font-weight:700}.opt.correct{background:var(--success-soft);border-color:var(--success)}.opt.correct .letter{background:var(--success);color:#fff;border-color:var(--success)}.opt.wrong{background:var(--danger-soft);border-color:var(--danger)}.opt.wrong .letter{background:var(--danger);color:#fff;border-color:var(--danger)}.num-row{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}.num-input{flex:1 1 180px;padding:.7rem .9rem;font-size:1rem;border:2px solid var(--border-strong);border-radius:var(--radius-sm);background:#fff;outline:none;transition:border-color .2s,box-shadow .2s;font-family:var(--font-body);color:var(--text)}.num-input:focus{border-color:var(--primary);box-shadow:0 0 0 4px #2563eb24}.feedback{margin-top:.8rem;border-radius:var(--radius-sm);padding:.75rem .95rem;font-size:.9rem;animation:fadeUp .3s ease}.feedback.ok{background:var(--success-soft);color:#14532d}.feedback.no{background:var(--danger-soft);color:#7f1d1d}.feedback .head{font-weight:700;display:flex;align-items:center;gap:.4rem;margin-bottom:.2rem}.hint-box{margin-top:.7rem;background:var(--secondary-soft);color:#78350f;border-radius:var(--radius-sm);padding:.65rem .9rem;font-size:.88rem}.lesson-nav{display:flex;justify-content:space-between;gap:.7rem;margin-top:1.3rem;flex-wrap:wrap}.grapher{background:#fff;border-radius:var(--radius);box-shadow:var(--clay);padding:1rem}.grapher svg{width:100%;height:auto;display:block;border-radius:var(--radius-sm);background:var(--card)}.slider-row{display:grid;grid-template-columns:70px 1fr 54px;align-items:center;gap:.7rem;margin-top:.5rem;font-size:.85rem}input[type=range]{width:100%;accent-color:var(--primary)}.eq{font-weight:700;color:var(--primary-deep);font-size:1rem;text-align:center;margin-bottom:.4rem}.table{width:100%;border-collapse:collapse;font-size:.86rem}.table th{text-align:right;font-size:.76rem;color:var(--muted);font-weight:700;padding:.55rem .6rem;border-bottom:2px solid var(--border)}.table td{padding:.6rem;border-bottom:1px solid var(--border)}.table tr:hover td{background:#f6faff}.avatar{width:34px;height:34px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);display:inline-grid;place-items:center;font-size:.78rem;font-weight:700}.chip{font-size:.72rem;font-weight:700;padding:.15rem .55rem;border-radius:999px}.chip-foundation{background:var(--secondary-soft);color:#92400e}.chip-core{background:var(--primary-soft);color:var(--primary-deep)}.chip-advanced{background:var(--violet-soft);color:#5b21b6}.filters{display:flex;gap:.45rem;flex-wrap:wrap}.filter{border:2px solid var(--border-strong);background:#fff;border-radius:999px;padding:.35rem .85rem;font-size:.82rem;font-weight:700;color:var(--muted);cursor:pointer;transition:all .18s}.filter:hover{border-color:var(--primary);color:var(--primary-deep)}.filter.on{background:var(--primary);color:#fff;border-color:var(--primary)}.toast-wrap{position:fixed;bottom:1.3rem;left:1.3rem;z-index:90;display:flex;flex-direction:column;gap:.5rem}.toast{padding:.7rem 1.15rem;border-radius:var(--radius-sm);font-size:.88rem;font-weight:700;box-shadow:0 14px 30px #0f172a26;animation:fadeUp .3s ease}.toast.success{background:var(--success-soft);color:#14532d;border:1px solid #86EFAC}.toast.error{background:var(--danger-soft);color:#7f1d1d;border:1px solid #FCA5A5}.empty{text-align:center;padding:2.5rem 1rem;color:var(--muted)}@keyframes fadeUp{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}.fade-up{animation:fadeUp .45s ease both}.d1{animation-delay:.06s}.d2{animation-delay:.12s}.d3{animation-delay:.18s}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}@media (max-width: 940px){.hero{grid-template-columns:1fr}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 700px){.nav-links{display:none}.grid-3,.grid-2{grid-template-columns:1fr}.hero{padding-top:2rem}.card{padding:1.15rem;border-radius:22px}.lesson-head h1{font-size:1.35rem}.table-wrap{overflow-x:auto}.slider-row{grid-template-columns:58px 1fr 44px}}.panel-2{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}@media (max-width: 940px){.panel-2{grid-template-columns:1fr}}@media (max-width: 700px){.nav-inner{flex-wrap:wrap;gap:.4rem}.nav-links{display:flex;order:3;width:100%;overflow-x:auto;gap:.2rem;padding-bottom:.25rem}.nav-link{white-space:nowrap;font-size:.82rem;padding:.4rem .7rem}.brand-sub{display:none}}
