@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&family=Manrope:wght@400;500;600;700;800&family=Noto+Naskh+Arabic:wght@400;500;600;700&display=swap');
:root{--ink:#183735;--ink2:#395b57;--muted:#768881;--line:#e4eae5;--bg:#f6f8f4;--card:#fff;--green:#126e58;--deep:#0b3931;--mint:#e4f4eb;--mint2:#f1f8f3;--gold:#cba968;--amber:#ad7021;--danger:#b63a32;--shadow:0 8px 28px rgba(18,59,43,.045);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:'DM Sans','Manrope',Arial,sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a{color:inherit;text-decoration:none}img,svg{max-width:100%}input,select{min-width:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #86d0ac;outline-offset:2px}body[dir='rtl']{font-family:'Noto Naskh Arabic',Tahoma,Arial,sans-serif;font-size:17px}body[dir='rtl'] .latin,body[dir='rtl'] .formula-eq,body[dir='rtl'] .num,body[dir='rtl'] .math-text,body[dir='rtl'] input[type='number']{font-family:'DM Sans',Arial,sans-serif;direction:ltr;unicode-bidi:isolate}body[dir='rtl'] .graph-area,body[dir='rtl'] .chart-svg{direction:ltr}body[dir='rtl'] .hero-illustration{direction:ltr}
.shell{display:flex;min-height:100vh}.sidebar{width:258px;flex:none;background:#fff;border-inline-end:1px solid var(--line);padding:26px 15px 22px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto;z-index:30}.brand{display:flex;align-items:center;gap:11px;padding:6px 10px 25px;cursor:pointer}.brandmark{width:42px;height:42px;flex:none;background:var(--deep);border-radius:13px;display:grid;place-items:center;box-shadow:0 3px 8px #103f3329}.brandmark svg{width:30px;height:30px}.brandname{font-family:Manrope,'DM Sans',sans-serif;font-size:20px;line-height:1.1;font-weight:800;letter-spacing:-.7px;color:var(--deep)}.brandsub{font-size:9px;letter-spacing:1.35px;color:#8a998e;font-weight:800;line-height:1.65;margin-top:5px}.nav-group-title{padding:15px 14px 9px;color:#93a29a;font-size:10px;letter-spacing:1.5px;font-weight:800;text-transform:uppercase}.nav{display:flex;flex-direction:column;gap:5px}.navbtn{width:100%;display:flex;align-items:center;gap:11px;padding:11px 13px;border:1px solid transparent;border-radius:10px;background:none;text-align:start;color:#687e77;font-weight:600;font-size:13px;transition:.18s}.navbtn svg{width:18px;height:18px;flex:none;stroke-width:1.8}.navbtn:hover{background:#f4f8f3;color:var(--deep)}.navbtn.active{background:#e9f6ee;border-color:#d7ebdc;color:#0a654f;font-weight:800}.navbtn.active svg{stroke:#187f5e}.nav-sep{height:1px;background:#eff1ed;margin:16px 12px}.sidebar-bottom{margin-top:auto}.sidebar-advice{border:1px solid #d7e9df;background:#f2faf5;border-radius:14px;padding:15px 14px;margin:14px 3px 8px}.sidebar-advice .advice-ico{background:#dcefe4;width:33px;height:33px;display:grid;place-items:center;border-radius:9px;color:var(--green)}.sidebar-advice strong{display:block;font-size:12px;margin-top:7px}.sidebar-advice p{margin:4px 0;color:#6f8676;font-size:11px}.sidebar-footer{display:flex;justify-content:space-between;align-items:center;padding:9px 12px;color:#98a99f;font-size:10px}.sidebar-footer span{font-weight:800;color:#527c61}
.main{flex:1;min-width:0;max-width:100%}.topbar{height:83px;background:#ffffffd9;backdrop-filter:blur(14px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,3.1vw,48px);gap:15px;position:sticky;top:0;z-index:20}.breadcrumbs{display:flex;flex-direction:column;min-width:0}.eyebrow{font-weight:800;color:#91a399;letter-spacing:1.7px;font-size:10px;text-transform:uppercase}.top-page{font-family:Manrope,sans-serif;font-weight:800;letter-spacing:-.6px;font-size:21px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.top-actions{display:flex;gap:10px;align-items:center}.lang-select{border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--ink);padding:9px 27px 9px 10px;font-size:12px;font-weight:700;max-width:130px}.streak-pill,.point-pill{border:1px solid #f1e7d0;color:#946627;border-radius:10px;padding:9px 11px;font-size:12px;font-weight:800;display:flex;align-items:center;gap:6px;background:#fffaf2}.point-pill{border-color:#e0eee4;color:#236d50;background:#f8fcf8}.avatar{width:37px;height:37px;border-radius:11px;display:grid;place-items:center;background:#e0f0e3;color:#236847;font-weight:900;border:1px solid #cee5d4}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px;width:38px;height:38px}.page{padding:29px clamp(18px,3.1vw,48px) 60px;max-width:1560px;margin:0 auto}.page h1,.page h2,.page h3,.page p{margin-top:0}h1{font-family:Manrope,sans-serif;font-size:32px;line-height:1.26;letter-spacing:-1.1px;margin-bottom:10px}h2{font-family:Manrope,sans-serif;font-size:19px;letter-spacing:-.5px;line-height:1.38}h3{font-family:Manrope,sans-serif;font-size:15px;letter-spacing:-.3px}.muted{color:var(--muted)}.small{font-size:12px}.tiny{font-size:10px}.section{margin-top:26px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:15px}.section-head h2{margin:0}.text-link{background:transparent;border:0;color:#1a8060;font-size:12px;font-weight:800}.text-link:hover{text-decoration:underline}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.pad{padding:22px}.hero{background:linear-gradient(109deg,#0a3831 0%,#115040 66%,#1b6850 100%);border-radius:20px;min-height:266px;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(250px,.85fr);overflow:hidden;position:relative;box-shadow:0 11px 26px #0e553b19}.hero:before{content:'';position:absolute;left:39%;top:-170px;width:490px;height:490px;border:1px solid #ffffff15;border-radius:50%}.hero:after{content:'';position:absolute;left:53%;top:-80px;width:310px;height:310px;border:1px solid #ffffff13;border-radius:50%}.hero-copy{padding:33px 36px;position:relative;z-index:2;color:white}.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:10px;font-weight:800;color:#e9d7a8;letter-spacing:1.35px;margin-bottom:10px}.hero h1{font-size:31px;max-width:610px;margin-bottom:10px;color:#f9fbf6}.hero p{font-size:12.5px;line-height:1.8;color:#cae0d3;max-width:530px;margin-bottom:19px}.btn{border:1px solid transparent;padding:11px 17px;border-radius:10px;font-size:12px;font-weight:800;display:inline-flex;align-items:center;gap:8px;justify-content:center;white-space:nowrap}.btn svg{width:16px;height:16px}.btn.primary{background:#cba765;color:#153b31}.btn.primary:hover{background:#f0cb86}.btn.green{background:#146c53;color:#fff}.btn.green:hover{background:#0c513f}.btn.outline{border-color:#d7e6dc;color:#286a53;background:#fff}.btn.outline:hover{background:#f2faf5}.btn.dark{background:#103e32;color:white}.btn.ghost{background:transparent;color:inherit;border-color:#ffffff60}.btn.smallbtn{padding:7px 11px;font-size:11px}.hero-actions{display:flex;gap:9px;flex-wrap:wrap}.hero-illustration{position:relative;display:flex;align-items:center;justify-content:center;min-height:240px}.hero-illustration svg{width:min(95%,405px);height:auto;position:relative;z-index:1;filter:drop-shadow(0 19px 30px #062c2966)}.kpi-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:18px}.kpi{background:white;border:1px solid var(--line);border-radius:15px;padding:17px 18px;display:flex;justify-content:space-between;gap:10px;min-height:96px;box-shadow:var(--shadow)}.kpi-label{font-size:11px;color:#7f9188;font-weight:700;margin-bottom:7px}.kpi-value{font:800 26px/1.3 Manrope,sans-serif;letter-spacing:-1.2px;color:#23443d}.kpi-icon{width:34px;height:34px;background:#e9f5ed;color:#2c8a61;display:grid;place-items:center;border-radius:10px;flex:none}.kpi-icon.amber{background:#fff4dc;color:#c18d35}.kpi-icon.blue{background:#edf5fc;color:#5384bb}.kpi-icon.purple{background:#f3f0fb;color:#8d71b2}.kpi-icon svg{width:19px;height:19px}.two-col{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.8fr);gap:18px}.continue-card{display:grid;grid-template-columns:86px minmax(0,1fr);gap:18px;align-items:center}.course-illustration{width:86px;height:91px;border-radius:13px;background:linear-gradient(140deg,#eaf4e8,#c5e5d5);display:flex;align-items:center;justify-content:center;color:#2c7357}.course-illustration svg{width:47px;height:47px}.progress-rail{height:7px;border-radius:10px;background:#edf1ed;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#168769,#c7a66a);border-radius:10px}.statusline{display:flex;align-items:center;gap:8px;margin:7px 0 11px}.tag{font-size:10px;font-weight:800;color:#237958;background:#eaf5ec;border:1px solid #d7e9de;border-radius:30px;padding:4px 9px;display:inline-flex;align-items:center;gap:4px;line-height:1.3}.tag.gold{background:#fff7e5;border-color:#f0e3c5;color:#b17a2a}.tag.gray{background:#f4f5f2;border-color:#e4e7e0;color:#89968c}.tag.blue{background:#ecf3fd;border-color:#dce8f6;color:#5b81ac}.lesson-title{font:800 17px/1.4 Manrope,sans-serif;margin:6px 0}.lesson-copy{font-size:12px;color:var(--muted);margin-bottom:12px}.mission{display:flex;gap:12px;align-items:center;padding:11px 0;border-bottom:1px solid #f0f3ed}.mission:last-child{border-bottom:0}.mission-checkbox{width:29px;height:29px;border:1px solid #dce9df;border-radius:9px;display:grid;place-items:center;color:#8a9c90;flex:none}.mission-checkbox.done{background:#e3f6e9;color:#16825e;border-color:#c8e8d6}.mission-content{min-width:0;flex:1}.mission-content strong{display:block;font-size:12px;font-weight:800}.mission-content small{color:var(--muted);font-size:11px}.xp{font-size:11px;font-weight:800;color:#348461;white-space:nowrap}.subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.subject-card{padding:17px;border:1px solid var(--line);background:white;border-radius:15px;display:flex;flex-direction:column;gap:9px;min-height:166px;transition:.2s;text-align:start}.subject-card:hover{transform:translateY(-2px);border-color:#9dcbb0;box-shadow:0 8px 22px #1a5d3912}.subject-icon{display:grid;place-items:center;width:37px;height:37px;border-radius:11px;color:#227555;background:#e9f4ec}.subject-icon svg{width:21px;height:21px}.subject-card h3{font-size:13px;margin:2px 0 0}.subject-card p{font-size:11px;color:#7e9388;line-height:1.5;margin:0;min-height:34px}.subject-meta{display:flex;gap:7px;flex-wrap:wrap;margin-top:auto;color:#8fa096;font-size:10px;font-weight:800}.pill-row{display:flex;gap:7px;flex-wrap:wrap}.filter{border:1px solid #e0e8e1;background:white;color:#728a7c;padding:8px 13px;font-size:11px;font-weight:700;border-radius:9px}.filter.active{background:#e4f4ea;color:#176e53;border-color:#bae2c7}.searchbox{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:10px;background:white;color:#96a69a;padding:9px 13px;max-width:360px}.searchbox input{outline:none;border:none;width:100%;font-size:12px;background:transparent;color:var(--ink)}.searchbox svg{width:17px;height:17px;flex:none}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:22px}.page-head p{margin-bottom:0;color:var(--muted);font-size:12px;max-width:720px}.catalog-toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:18px}.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.catalog-card{background:white;border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:8px;transition:.2s}.catalog-card:hover{border-color:#a4d0b4}.catalog-card h3{font-size:15px;margin:5px 0 0}.catalog-card p{font-size:11px;color:var(--muted);line-height:1.6;flex:1}.catalog-progress{height:5px;background:#ecf1ed;border-radius:5px;overflow:hidden}.catalog-progress span{display:block;height:100%;background:#249a70}.catalog-foot{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);gap:8px}.catalog-detail{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:18px;align-items:start}.topic-list{display:flex;flex-direction:column;gap:9px}.topic{display:flex;align-items:center;gap:13px;padding:13px 16px;border:1px solid var(--line);background:white;border-radius:11px}.topic-num{width:31px;height:31px;display:grid;place-items:center;border:1px solid #e4ece6;border-radius:9px;font-weight:800;font-size:11px;color:#678278;flex:none}.topic-num.ready{background:#e6f4ed;border-color:#cfebda;color:#187553}.topic-text{flex:1;min-width:0}.topic-text strong{display:block;font-size:12px}.topic-text small{display:block;color:#90a196;font-size:10px}.topic .btn{flex:none}.mini-stat{display:flex;justify-content:space-between;font-size:12px;gap:8px;padding:11px 0;border-bottom:1px solid #edf2eb}.mini-stat:last-child{border-bottom:none}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:20px;align-items:start}.lesson-main{display:flex;flex-direction:column;gap:16px}.lesson-sidebar{position:sticky;top:106px}.lesson-lead{font-size:15px;line-height:1.85;color:#526f5d}.content-copy{font-size:14px;line-height:1.95;color:#4e655c}.step-list{margin:0;padding-inline-start:0;list-style:none;display:flex;flex-direction:column;gap:11px}.step-list li{display:flex;gap:13px;align-items:flex-start}.step-circle{display:grid;place-items:center;border-radius:50%;width:27px;height:27px;background:#e4f4eb;color:#25825d;font-size:12px;font-weight:800;flex:none}.step-copy{padding-top:3px;color:#526d5b;font-size:13px}.formula-eq{font-family:'DM Sans',Arial,sans-serif;font-size:clamp(21px,3vw,34px);font-weight:800;letter-spacing:.15px;text-align:center;direction:ltr;unicode-bidi:isolate;color:#174e3a;overflow-wrap:anywhere}.formula-box{background:linear-gradient(130deg,#f3faf3,#fdfbf5);border:1px solid #d5e9db;border-radius:14px;padding:24px 16px;margin:15px 0}.var-chips{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.var-chip{border:1px solid #d7e6dc;background:white;color:#376c55;padding:7px 12px;border-radius:8px;font-size:13px;font-weight:800;font-family:'DM Sans',Arial,sans-serif;direction:ltr}.var-chip.selected{background:#145b46;color:white;border-color:#145b46}.var-detail{background:#eff7f0;border:1px solid #d8e9dd;border-radius:12px;padding:16px;margin-top:10px}.var-detail strong{font-size:14px}.var-detail p{font-size:12px;color:#5b7665;margin:7px 0}.info-row{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;font-size:12px;margin-top:6px}.info-row .muted{font-size:11px}.solution{background:#f8faf5;border-inline-start:3px solid #7bb394;padding:13px 16px;border-radius:3px 9px 9px 3px;color:#536958;font-size:13px}.quiz-option{display:block;width:100%;border:1px solid #e0e9e0;background:#fff;color:#325248;padding:11px 13px;border-radius:10px;margin-bottom:8px;text-align:start;font-size:13px}.quiz-option:hover,.quiz-option.selected{border-color:#16855f;background:#edf8ef}.quiz-feedback{padding:13px;border-radius:12px;font-size:12px;line-height:1.8;margin-top:11px}.quiz-feedback.ok{background:#e7f6e9;color:#1d6c48;border:1px solid #bfe5ca}.quiz-feedback.bad{background:#fff6e9;color:#8e6225;border:1px solid #f5e3bf}.number-answer{width:min(260px,100%);padding:11px 13px;border:1px solid #d8e5db;border-radius:10px;direction:ltr;unicode-bidi:isolate;font-family:'DM Sans',sans-serif}.lab-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.lab-tab{border:1px solid var(--line);background:white;border-radius:10px;padding:10px 12px;font-size:12px;font-weight:800;color:#758c7c}.lab-tab.active{background:#104d3d;color:white;border-color:#104d3d}.lab-grid{display:grid;grid-template-columns:minmax(240px,.72fr) minmax(0,1.28fr);gap:19px}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field label{font-size:12px;color:#506b5c;font-weight:800}.field input,.field select{border:1px solid #dce7df;padding:11px 12px;background:#fff;color:var(--ink);border-radius:10px;width:100%;font-size:13px}.field-note{font-size:11px;color:#879c8b}.result-card{border:1px solid #cfe7d6;background:#eaf7ee;padding:15px;border-radius:12px;margin-top:8px}.result-number{font-family:Manrope,sans-serif;color:#185d43;font-size:28px;font-weight:800}.graph-area{border:1px solid #dfeae1;border-radius:13px;background:linear-gradient(#fff,#fcfefd);padding:14px;overflow:hidden;min-height:278px;display:flex;align-items:center;justify-content:center}.chart-svg{width:100%;height:auto;max-height:355px}.chart-legend{display:flex;gap:18px;font-size:11px;color:#647f6e;margin-top:8px;align-items:center;justify-content:center;flex-wrap:wrap}.legend-dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-inline-end:6px}.formula-grid{display:grid;grid-template-columns:290px minmax(0,1fr);gap:20px}.formula-list{display:flex;flex-direction:column;gap:7px;max-height:760px;overflow-y:auto}.formula-list button{border:1px solid var(--line);border-radius:11px;background:#fff;text-align:start;padding:12px 13px;display:flex;flex-direction:column;gap:3px;color:#315948}.formula-list button.selected{border-color:#72b493;background:#eaf6ed}.formula-list button strong{font-size:12px}.formula-list button small{font:600 13px 'DM Sans',sans-serif;color:#6c9c7b;direction:ltr;align-self:flex-start}.progress-ring{width:78px;height:78px;display:grid;place-items:center;border-radius:50%;background:conic-gradient(#27a674 var(--angle),#e7f0e7 0);position:relative}.progress-ring:before{content:'';position:absolute;inset:8px;border-radius:50%;background:white}.progress-ring span{position:relative;color:#22694b;font-size:15px;font-weight:800}.badge-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.badge-card{text-align:center;padding:20px 10px}.badge-medal{width:57px;height:57px;border-radius:50%;background:#e3f4e8;color:#2e976f;display:grid;place-items:center;margin:0 auto 11px}.badge-card.muted-badge{opacity:.47;filter:grayscale(.8)}.notebook-entry{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:13px;padding:14px;background:white;margin:9px 0}.notebook-entry .formula-eq{font-size:17px}.toast{position:fixed;bottom:20px;inset-inline-end:20px;z-index:100;background:#164b3c;color:white;padding:13px 17px;border-radius:12px;box-shadow:0 10px 24px #052d2740;font-size:12px;font-weight:700;max-width:min(400px,90vw);animation:pop .25s ease-out}.toast.error{background:#924034}@keyframes pop{from{transform:translateY(12px);opacity:0}to{transform:translateY(0);opacity:1}}.empty-state{padding:36px;text-align:center;color:#8d9c92;background:#fdfefd;border:1px dashed #d4e6d8;border-radius:14px}.empty-state svg{width:39px;height:39px;color:#aac6ac}.intro-rule{margin-top:20px;border:1px solid #e9ece3;background:#fffdf6;border-radius:13px;padding:13px 17px;font-size:12px;color:#978455}.hint-btn{border:0;background:transparent;color:#2c895c;font-size:12px;font-weight:800;padding:8px 0}.setting-actions{display:flex;gap:10px;flex-wrap:wrap}.footer{padding:24px 0 0;text-align:center;color:#9ca99c;font-size:11px}.mobile-nav{display:none}.scrim{display:none}.boot{display:flex;min-height:100vh;align-items:center;justify-content:center;flex-direction:column;font:800 20px Manrope,sans-serif;color:var(--deep);gap:12px}.boot-logo{display:grid;place-items:center;background:var(--deep);color:var(--gold);width:62px;height:62px;border-radius:17px;font-size:35px}.boot-sub{font-size:13px;color:#8c9c91;font-weight:500}body[dir='rtl'] .hero-copy{text-align:start}body[dir='rtl'] .navbtn{text-align:start}body[dir='rtl'] .sidebar,body[dir='rtl'] .topbar{font-family:'Noto Naskh Arabic',Tahoma,sans-serif}body[dir='rtl'] .brandsub{letter-spacing:.2px;font-size:10px}body[dir='rtl'] .top-page,body[dir='rtl'] .subject-card h3,body[dir='rtl'] .lesson-title,body[dir='rtl'] h1,body[dir='rtl'] h2,body[dir='rtl'] h3{font-family:'Noto Naskh Arabic',Tahoma,sans-serif;letter-spacing:0}body[dir='rtl'] .hero h1{font-size:34px}body[dir='rtl'] .hero p{font-size:15px}body[dir='rtl'] .navbtn{font-size:14px}body[dir='rtl'] .content-copy{font-size:17px;line-height:2}body[dir='rtl'] .step-copy{font-size:15px}body[dir='rtl'] .brandsub{font-size:10px}
@media(max-width:1320px){.sidebar{width:230px}.hero h1{font-size:27px}.subject-grid,.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.kpi{padding:15px 12px}.kpi-value{font-size:23px}}
@media(max-width:1040px){.sidebar{width:215px}.topbar{padding:0 23px}.page{padding:24px 23px 60px}.two-col{grid-template-columns:1fr}.hero{grid-template-columns:minmax(0,1fr) minmax(170px,.65fr)}.hero-copy{padding:28px 26px}.hero h1{font-size:25px}.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-layout{grid-template-columns:1fr}.lesson-sidebar{position:static}.formula-grid{grid-template-columns:230px minmax(0,1fr)}}
@media(max-width:760px){.sidebar{position:fixed;transform:translateX(-110%);inset-inline-start:0;top:0;bottom:0;width:275px;transition:transform .24s;box-shadow:12px 0 35px #103c3022}.shell.mobile-open .sidebar{transform:translateX(0)}body[dir='rtl'] .sidebar{transform:translateX(110%)}body[dir='rtl'] .shell.mobile-open .sidebar{transform:translateX(0)}.scrim{position:fixed;inset:0;background:#092c2455;z-index:25}.shell.mobile-open .scrim{display:block}.menu-toggle{display:grid;place-items:center}.topbar{height:72px;padding:0 16px;gap:8px}.top-page{font-size:17px}.eyebrow{font-size:9px}.top-actions{gap:6px}.point-pill{display:none}.streak-pill{padding:7px 8px}.lang-select{padding:7px 12px 7px 7px;max-width:86px;font-size:11px}.avatar{width:32px;height:32px}.page{padding:20px 15px 93px}.hero{grid-template-columns:1fr;min-height:250px}.hero-copy{padding:27px 24px 18px}.hero h1{font-size:26px}.hero p{font-size:12px}.hero-illustration{position:absolute;right:-56px;top:10px;width:210px;opacity:.18;height:180px;pointer-events:none}.hero-illustration svg{width:210px}.kpi-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.kpi{min-height:91px}.two-col{gap:15px}.subject-grid,.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.subject-card{padding:14px;min-height:166px}.catalog-card{padding:15px}.page-head{align-items:flex-start;flex-direction:column}.catalog-detail,.lab-grid,.formula-grid{grid-template-columns:1fr}.formula-list{flex-direction:row;overflow-x:auto;max-height:none;padding-bottom:8px}.formula-list button{min-width:195px;flex:none}.badge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.pad{padding:17px}.mobile-nav{position:fixed;bottom:0;left:0;right:0;z-index:19;background:#ffffffed;backdrop-filter:blur(12px);border-top:1px solid var(--line);display:flex;justify-content:space-around;padding:7px 3px calc(7px + env(safe-area-inset-bottom))}.mobile-nav button{border:0;background:none;display:flex;flex-direction:column;align-items:center;gap:3px;color:#82958a;font-size:9px;font-weight:700;min-width:55px;padding:4px}.mobile-nav button.active{color:#16805b}.mobile-nav svg{width:20px;height:20px}.toast{bottom:83px}.topic{padding:12px 10px;gap:9px}.topic-text strong{font-size:11px}.topic .btn{padding:7px 9px;font-size:10px}}
@media(max-width:390px){.streak-pill{font-size:10px}.top-page{font-size:15px}.avatar{display:none}.subject-grid,.catalog-grid{grid-template-columns:1fr}.hero h1{font-size:23px}.kpi-value{font-size:22px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
/* Phase 2: compact prerequisite suggestions and mobile-friendly teaching links. */
.prereq-card{background:linear-gradient(135deg,#f7fcf8,#fffdf6);border-color:#cfe5d5}
.prereq-card h2{margin-bottom:12px}
.prereq-pill{border:1px solid #d7e9dc;background:#fff;color:#2b654e;border-radius:999px;padding:9px 13px;font-size:12px;font-weight:750;display:inline-flex;align-items:center;gap:7px;text-align:start;max-width:100%;white-space:normal}
.prereq-pill:hover,.prereq-pill:focus-visible{border-color:#63ad87;background:#eff8f1}
.prereq-pill.prereq-done{border-color:#b9e0c7;background:#e8f7ed;color:#166146}
.phase2-link{margin-top:18px}.phase2-link .btn{white-space:normal;text-align:center}
body[dir='rtl'] .prereq-pill{font-family:'Noto Naskh Arabic',Tahoma,sans-serif;font-size:14px}
@media(max-width:540px){.prereq-pill{width:100%;border-radius:11px;justify-content:flex-start}.phase2-link .btn{width:100%}}

/* Phase 2.1: account and cloud-sync panel */
.cloud-card{margin-bottom:17px;border:1px solid #c4dacd;background:linear-gradient(140deg,#f7fff9,#fffef9)}
.cloud-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start;flex-wrap:wrap}
.cloud-head h2{margin:0}.cloud-head p{margin:6px 0 0}.cloud-status{border:1px solid #d4e0d5;border-radius:30px;padding:5px 12px;font-size:11px;background:#f4f8f5;max-width:100%}
.cloud-status.ok{color:#146d4e;background:#e6f7ea}.cloud-status.bad{color:#9e322e;background:#fff2ed}
.cloud-form{display:grid;gap:10px;margin:15px 0}.cloud-form label{font-size:12px;font-weight:700}.cloud-form input{width:100%;border:1px solid #c9d9cc;border-radius:12px;padding:12px;font-size:14px;background:white}
.cloud-message{padding:12px;border-radius:10px;background:#fff4dd;color:#4d4430;overflow-wrap:anywhere}.cloud-card .notice{margin-top:16px;padding:12px;border-radius:12px;background:#eef6ed;line-height:1.6}.cloud-card .notice p{margin-top:0}
.cloud-card .setting-actions{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}.cloud-card .btn{white-space:normal}

/* Phase 3 */
.phase3-formula-links{margin-top:16px;display:flex;flex-wrap:wrap;gap:9px}.phase3-formula-links .btn{white-space:normal;text-align:start}.phase3-legend{margin-top:12px}.lab-grid .result-card .mini-stat strong{overflow-wrap:anywhere}.lab-tabs{scrollbar-width:thin}.graph-area svg{width:100%;height:auto}
@media(max-width:540px){.phase3-formula-links .btn{width:100%}.lab-grid .result-card{padding:13px}.lab-grid .result-card .mini-stat{font-size:12px}}
/* Phase 4: locally processed economics datasets */
.phase4-controls{display:grid;gap:12px;margin:18px 0;padding:15px;background:#f4faf6;border:1px solid #d6e7d8;border-radius:15px}
.p4-demo-note{font-size:13px;color:#71521e;background:#fff5d9;border:1px solid #eaddb6;border-radius:9px;padding:10px 12px;line-height:1.5}
.p4-btn-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0}
.p4-btn-row .btn{max-width:100%;white-space:normal;text-align:center}
.p4-upload{display:grid;gap:8px;font-size:13px;font-weight:650;color:var(--text);border:1px dashed #8aab94;border-radius:11px;padding:12px;background:white;cursor:pointer}
.p4-upload input{min-width:0;width:100%;font-size:12px;cursor:pointer}
.p4-stats{display:grid;gap:5px;grid-template-columns:minmax(0,1fr)}
.p4-stats .mini-stat{gap:12px}
.p4-stats .mini-stat strong{overflow-wrap:anywhere;text-align:end}
.p4-alert{padding:14px;background:#fff4ec;border:1px solid #e5c0a9;color:#754c31;border-radius:9px;line-height:1.5}
.p4-table-wrap{margin:18px 0;overflow-x:auto;max-width:100%;border-radius:10px;border:1px solid #e4ece5;background:white}
.p4-table{border-collapse:collapse;min-width:100%;font-size:12px;white-space:nowrap}
.p4-table caption{caption-side:top;text-align:start;padding:10px 12px;font-weight:700;color:#47715d}
.p4-table th,.p4-table td{padding:8px 12px;text-align:start;border-top:1px solid #e6ede6}
.p4-table th{background:#f3f8f4;color:#426950}
.p4-table tbody tr:nth-child(even){background:#fbfdfb}
@media(max-width:650px){.p4-btn-row{display:grid;grid-template-columns:1fr 1fr}.p4-btn-row .btn{font-size:12px;padding:10px 7px}.p4-table{font-size:11px}}

/* Phase 7: contract workflow checklists and formula explorations */
.p7-formula-links{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.p7-formula-links .btn{max-width:100%;white-space:normal;text-align:start}.p7-process{margin:16px 0;padding:16px 20px;border:1px solid #c6e2d3;border-radius:13px;background:#f3faf6}.p7-process h3{margin:0 0 12px;color:#176b4e;font-size:16px}.p7-process ol{margin:0;padding-inline-start:23px}.p7-process li{margin:9px 0;line-height:1.6}.p7-process li::marker{color:#18815c;font-weight:700}@media(max-width:600px){.p7-formula-links .btn{width:100%}.p7-process{padding:12px 15px}.p7-process h3{font-size:15px}}

/* Phase 8: research studio and a usable catalogue of 74 labs. */
.r8-track-list{display:grid;gap:7px;max-height:460px;overflow:auto;padding-inline-end:5px;margin-top:12px}
.r8-track-list .mini-stat{min-width:0;gap:12px}.r8-track-list .mini-stat span{min-width:0;overflow-wrap:anywhere}
.lab-tabs{max-height:185px;overflow-y:auto;overscroll-behavior:contain;padding:3px 5px 8px 0;align-content:flex-start;border-bottom:1px solid var(--line)}
.lab-tabs:focus-within{max-height:320px}
.lab-grid>*,.page-head>*,.r8-track-list>*{min-width:0}
.field textarea[data-r8-field]{box-sizing:border-box;max-width:100%;font:inherit;line-height:1.6;background:#fff}
[dir=rtl] .field textarea[data-r8-field]{text-align:start;direction:rtl}
@media(max-width:760px){.lab-tabs{max-height:160px}.r8-track-list{max-height:300px}.lab-grid .card{min-width:0}}