/* Layout: navy header bar, bright hero with the daily-challenge card, counters band, ad strip, three stage cards, games, lessons, ask form, advertise block, footer. Royal blue + gold from the teacher's booklet template. */
:root{
  --bg:#f6f8ff; --surface:#ffffff; --pale:#eaf0ff; --ink:#0f1d4f; --muted:#56628c; --line:#d6def5;
  --deep:#0a2370; --brand:#1f46b8; --link:#1f46b8; --gold:#c99700; --gold-soft:#f7dd80; --gold-wash:#fff6d6;
  --hero-a:#0a2370; --hero-b:#1f46b8; --on-dark:#ffffff; --on-dark-soft:#d9e2ff;
  --s1-bg:#fbe38a; --s1-fg:#0a2370; --s2-bg:#1f46b8; --s2-fg:#ffffff; --s3-bg:#0a2370; --s3-fg:#ffffff;
  --ok:#0f7a55; --bad:#c02a2a; --shadow:0 10px 28px rgba(10,35,112,.12);
  --font:"Cairo","Noto Sans Arabic","Segoe UI",Tahoma,sans-serif; --math:"STIX Two Text","Times New Roman",serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0a1130; --surface:#121b40; --pale:#17224f; --ink:#eef2ff; --muted:#a9b6e0; --line:#27356e;
  --link:#9fb4ff; --gold:#f0c53c; --gold-wash:#2a2410; --hero-a:#07123f; --hero-b:#16348f; --shadow:0 10px 28px rgba(0,0,0,.4); --ok:#4ad19b; --bad:#ff8a8a; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0a1130; --surface:#121b40; --pale:#17224f; --ink:#eef2ff; --muted:#a9b6e0; --line:#27356e;
  --link:#9fb4ff; --gold:#f0c53c; --gold-wash:#2a2410; --hero-a:#07123f; --hero-b:#16348f; --shadow:0 10px 28px rgba(0,0,0,.4); --ok:#4ad19b; --bad:#ff8a8a; color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.7;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:0}
a{color:var(--link)}
.wrap{max-width:1120px;margin-inline:auto}
.num{font-family:var(--math);direction:ltr;unicode-bidi:isolate;font-variant-numeric:tabular-nums}
h1,h2,h3{line-height:1.3;text-wrap:balance;margin:0}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px}

/* header */
.bar{background:var(--deep);color:var(--on-dark);margin-inline:calc(-1*max(16px,env(safe-area-inset-left,0px)));padding-inline:max(16px,env(safe-area-inset-left,0px));
  position:sticky;top:env(safe-area-inset-top,0px);z-index:20;border-bottom:3px solid var(--gold)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--deep)}
.bar .wrap{display:flex;align-items:center;gap:16px;padding-block:10px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit;margin-inline-end:auto}
.brand svg{width:46px;height:46px;flex:none}
.brand b{display:block;font-weight:900;font-size:1.2rem;line-height:1.1}
.brand small{color:var(--gold-soft);font-size:.78rem;font-weight:600}
.nav{display:flex;gap:4px;overflow-x:auto;max-width:100%}
.nav a{color:var(--on-dark-soft);text-decoration:none;font-weight:700;font-size:.95rem;padding:6px 12px;border-radius:999px;white-space:nowrap}
.nav a:hover{background:rgba(255,255,255,.12);color:#fff}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;font-weight:800;border-radius:999px;padding:10px 22px;text-decoration:none;font-size:1rem}
.btn-gold{background:var(--gold-soft);color:#0a2370}
.btn-gold:hover{background:#ffe9a0}
.btn-line{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-line:hover{background:rgba(255,255,255,.12)}
.btn-blue{background:var(--brand);color:#fff}
.btn-blue:hover{filter:brightness(1.1)}
.bar .btn{padding:7px 18px;font-size:.92rem}

/* hero */
.hero{background:linear-gradient(135deg,var(--hero-a),var(--hero-b));color:var(--on-dark);margin-inline:calc(-1*max(16px,env(safe-area-inset-left,0px)));padding-inline:max(16px,env(safe-area-inset-left,0px));position:relative;overflow:hidden}
.hero::before{content:"π  √x  ÷  ∞  ×  +  −  =";position:absolute;inset:0;font-family:var(--math);font-size:5.5rem;line-height:1.5;letter-spacing:.5em;color:rgba(255,255,255,.05);word-break:break-all;pointer-events:none;direction:ltr;padding:10px}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:center;padding-block:48px 36px}
.hero h1{font-size:clamp(1.9rem,4.2vw,3.1rem);font-weight:900}
.hero h1 em{font-style:normal;color:var(--gold-soft)}
.hero p.lead{color:var(--on-dark-soft);font-size:1.15rem;max-width:34em;margin:14px 0 24px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.chip-q{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);color:var(--gold-soft);padding:2px 14px;border-radius:999px;font-weight:700;font-size:.88rem;margin-bottom:14px}

.challenge{background:var(--surface);color:var(--ink);border-radius:22px;padding:22px;box-shadow:0 18px 40px rgba(0,0,0,.28);border-top:6px solid var(--gold);min-width:0}
.challenge .tag{display:flex;justify-content:space-between;align-items:center;gap:8px;color:var(--gold);font-weight:800;font-size:.9rem}
.challenge h3{font-size:1.15rem;margin:6px 0 10px}
.challenge .q{background:var(--pale);border-radius:14px;padding:14px 16px;font-size:1.25rem;font-weight:700;min-height:64px;display:flex;align-items:center;flex-wrap:wrap;gap:6px}
.challenge form{display:flex;gap:8px;margin-top:12px}
.challenge input{flex:1;min-width:0;border:2px solid var(--line);background:var(--surface);border-radius:12px;padding:8px 14px;font-size:1.1rem;direction:ltr;text-align:center}
.challenge .msg{min-height:1.6em;margin:10px 0 0;font-weight:700}
.ok{color:var(--ok)} .bad{color:var(--bad)}

/* counters */
.counters{position:relative;display:flex;gap:16px;flex-wrap:wrap;padding-block:0 30px}
.counter{flex:1 1 220px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);border-radius:18px;padding:14px 20px;display:flex;align-items:center;gap:16px;backdrop-filter:blur(4px)}
.counter .ic{width:46px;height:46px;border-radius:14px;background:var(--gold-soft);color:#0a2370;display:grid;place-items:center;flex:none}
.counter .ic svg{width:26px;height:26px}
.counter strong{display:block;font-size:2rem;line-height:1.1;font-family:var(--math);direction:ltr;text-align:start;font-weight:700;color:#fff}
.counter span.l{color:var(--on-dark-soft);font-weight:700;font-size:.95rem}
.note-demo{position:relative;color:var(--on-dark-soft);font-size:.8rem;padding-bottom:14px;margin:-14px 0 0}

/* ad slots */
.ad{border:2px dashed var(--gold);background:var(--gold-wash);border-radius:16px;display:grid;place-items:center;text-align:center;color:var(--muted);font-weight:700;padding:14px;min-height:96px}
.ad b{color:var(--ink);display:block}
.ad small{font-weight:600;font-family:var(--math);direction:ltr}
.ad-strip{margin-block:28px}
.ad-rect{min-height:250px}

/* sections */
section{padding-block:40px}
.sec-h{display:flex;align-items:end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:22px}
.sec-h h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:900;color:var(--ink)}
.sec-h h2::after{content:"";display:block;width:64px;height:5px;border-radius:5px;background:linear-gradient(90deg,var(--gold),var(--gold-soft));margin-top:8px}
.sec-h p{margin:0;color:var(--muted);max-width:36em}

.stages{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.stage{border-radius:24px;padding:26px;display:flex;flex-direction:column;gap:14px;box-shadow:var(--shadow);min-width:0}
.stage h3{font-size:1.6rem;font-weight:900}
.stage .sub{opacity:.85;font-weight:700;margin-top:-8px}
.stage.s1{background:var(--s1-bg);color:var(--s1-fg)}
.stage.s2{background:var(--s2-bg);color:var(--s2-fg)}
.stage.s3{background:var(--s3-bg);color:var(--s3-fg)}
.grades{display:flex;flex-wrap:wrap;gap:8px}
.grades a{text-decoration:none;color:inherit;font-weight:800;padding:6px 14px;border-radius:12px;background:rgba(255,255,255,.22);border:1px solid rgba(255,255,255,.35)}
.s1 .grades a{background:rgba(255,255,255,.55);border-color:rgba(10,35,112,.2)}
.grades a:hover{background:var(--gold-soft);color:#0a2370}
.track{border-top:1px solid rgba(255,255,255,.28);padding-top:12px}
.track h4{margin:0 0 8px;font-size:1.05rem;color:var(--gold-soft)}

.games{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}
.game{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px;min-width:0}
.game .g-ic{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;font-size:1.7rem;background:var(--pale);color:var(--link);font-family:var(--math);font-weight:700;direction:ltr}
.game h3{font-size:1.15rem;margin-top:6px}
.game p{margin:0;color:var(--muted);font-size:.95rem}
.badge{align-self:flex-start;margin-top:auto;font-size:.8rem;font-weight:800;padding:2px 12px;border-radius:999px;background:var(--pale);color:var(--link)}
.badge.live{background:#d8f5e8;color:#0b6b49}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .badge.live{background:#0f3a2c;color:#6fe3b3}}
:root[data-theme="dark"] .badge.live{background:#0f3a2c;color:#6fe3b3}

.two{display:grid;grid-template-columns:1.4fr 1fr;gap:20px}
.lessons{display:grid;gap:14px}
.lesson{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px 20px;display:flex;gap:16px;align-items:center;flex-wrap:wrap;box-shadow:var(--shadow)}
.lesson .info{flex:1 1 200px;min-width:0}
.lesson h3{font-size:1.1rem}
.lesson .meta{color:var(--muted);font-size:.9rem}
.pills{display:flex;gap:6px;flex-wrap:wrap}
.pill{font-size:.8rem;font-weight:800;padding:2px 12px;border-radius:999px;background:var(--pale);color:var(--link)}
.pill.lock{background:var(--gold-wash);color:var(--gold)}

.board{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow)}
.board h3{font-size:1.2rem;margin-bottom:4px}
.board ol{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:8px}
.board li{display:flex;align-items:center;gap:12px;background:var(--pale);border-radius:12px;padding:8px 12px;font-weight:700}
.board li i{font-style:normal;width:30px;height:30px;border-radius:50%;background:var(--gold);color:#fff;display:grid;place-items:center;font-family:var(--math);flex:none}
.board li span.sc{margin-inline-start:auto}
.fine{color:var(--muted);font-size:.85rem;margin:10px 0 0}

.ask{display:grid;grid-template-columns:1fr 1fr;gap:28px;background:var(--surface);border:1px solid var(--line);border-radius:26px;padding:28px;box-shadow:var(--shadow)}
.ask > *{min-width:0}
label{display:block;font-weight:700;margin-bottom:4px;font-size:.95rem}
.f{display:grid;gap:12px}
.f input,.f select,.f textarea{width:100%;border:2px solid var(--line);background:var(--bg);border-radius:12px;padding:9px 14px}
.f textarea{min-height:110px;resize:vertical}
.status{min-height:1.6em;font-weight:700;margin:0}

.adv{background:linear-gradient(135deg,var(--hero-a),var(--hero-b));color:var(--on-dark);border-radius:26px;padding:32px;display:grid;grid-template-columns:1.2fr .8fr;gap:28px}
.adv > *{min-width:0}
.adv h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:900}
.adv ul{padding-inline-start:20px;margin:14px 0;color:var(--on-dark-soft)}
.contact-line{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:rgba(255,255,255,.12);border-radius:14px;padding:8px 14px;margin-top:10px}
.contact-line .v{font-family:var(--math);direction:ltr;unicode-bidi:isolate;font-weight:700;font-size:1.05rem;word-break:break-all;user-select:all}
.copy{border:0;background:var(--gold-soft);color:#0a2370;font-weight:800;border-radius:999px;padding:3px 14px;cursor:pointer;margin-inline-start:auto}

footer{background:var(--deep);color:var(--on-dark-soft);margin-inline:calc(-1*max(16px,env(safe-area-inset-left,0px)));padding-inline:max(16px,env(safe-area-inset-left,0px));margin-top:40px;border-top:4px solid var(--gold)}
footer .wrap{padding-block:28px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
footer h4{margin:0 0 6px;color:var(--gold-soft)}
footer p{margin:0}
footer .v{font-family:var(--math);direction:ltr;unicode-bidi:isolate;display:inline-block;word-break:break-all}
.copyright{text-align:center;padding:12px 0 18px;font-size:.88rem;border-top:1px solid rgba(255,255,255,.14)}

/* share + about + qr */
.share{display:inline-flex;align-items:center;gap:6px;background:#128c4a;color:#fff;border-radius:999px;padding:8px 16px;font-weight:800;font-size:.92rem;text-decoration:none}
.share:hover{filter:brightness(1.1)}
.share svg{width:18px;height:18px;fill:currentColor}
.about{display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:26px;padding:26px;box-shadow:var(--shadow)}
.about > *{min-width:0}
.avatar{width:104px;height:104px;border-radius:50%;background:var(--deep);border:4px solid var(--gold);color:var(--gold-soft);display:grid;place-items:center;font-weight:900;font-size:2.4rem}
.about h2{font-size:clamp(1.4rem,2.6vw,1.9rem);font-weight:900}
.about p{margin:6px 0 0;color:var(--muted)}
.creds{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.cred{background:var(--gold-wash);color:var(--ink);border:1px solid var(--gold);border-radius:999px;padding:3px 14px;font-weight:700;font-size:.85rem;direction:ltr;unicode-bidi:isolate}
.channel{margin-top:14px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.qr{display:flex;gap:14px;align-items:center}
.qr img{width:96px;height:96px;background:#fff;border-radius:10px;padding:4px;flex:none}
/* dialog */
.ov{position:fixed;inset:0;background:rgba(5,10,40,.6);display:grid;place-items:center;z-index:50;padding:16px}
.dlg{background:var(--surface);color:var(--ink);border-radius:22px;padding:24px;width:min(440px,100%);box-shadow:0 20px 50px rgba(0,0,0,.4);max-height:100%;overflow:auto}
.dlg h3{font-size:1.3rem;margin-bottom:4px}
.dlg .x{float:inline-end;border:0;background:var(--pale);color:var(--ink);width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:1.1rem}

@media (max-width:860px){
  .about{grid-template-columns:1fr;justify-items:start}
  .hero .wrap,.two,.ask,.adv{grid-template-columns:1fr}
  .stages{grid-template-columns:1fr}
  .hero .wrap{padding-block:32px 24px}
  .ask,.adv{padding:20px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}