/* ===== مجموع — design system v2 (modern edtech) ===== */
:root{
  --bg:#f6f8fc; --card:#ffffff; --ink:#0f1720; --muted:#5b6b7f; --line:#e2e8f1;
  --brand:#2f7bf7; --brand-d:#1f60d4; --brand-soft:#e6f0ff;
  --accent:#2f7bf7; --accent-d:#1f60d4; --accent-soft:#e6f0ff;
  --green:#16a34a; --green-soft:#e7f6ee;
  --red:#e5484d; --red-soft:#fdeaea;
  --amber:#d98a1a; --amber-soft:#fbf1de;
  --track:#e6ebf3;
  --shadow:0 22px 48px -16px rgba(20,50,110,.28); --shadow-sm:0 7px 20px -8px rgba(20,50,110,.16);
  --rad:16px; --radS:12px;
  --grad:linear-gradient(120deg,#2f7bf7,#4f97ff);
}
[data-theme="dark"]{
  --bg:#0b1017; --card:#141b26; --ink:#e6edf5; --muted:#8a99ad; --line:#232d3b;
  --brand:#4d94ff; --brand-d:#2f7bf7; --brand-soft:#132234;
  --accent:#4d94ff; --accent-d:#2f7bf7; --accent-soft:#132234;
  --green:#22c55e; --green-soft:#0f2a1b; --red:#f2555a; --red-soft:#2c1618; --amber:#e0a52a; --amber-soft:#2c2414;
  --track:#232d3b;
  --shadow:0 22px 50px -16px rgba(0,0,0,.62); --shadow-sm:0 6px 18px -8px rgba(0,0,0,.45);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Cairo',system-ui,sans-serif;background:
  radial-gradient(1100px 640px at 8% -10%,rgba(47,123,247,.13),transparent 55%),
  radial-gradient(1000px 720px at 94% 110%,rgba(47,123,247,.09),transparent 60%),
  var(--bg);background-attachment:fixed;color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
[data-theme="dark"] body{background:
  radial-gradient(1100px 640px at 8% -10%,rgba(77,148,255,.15),transparent 55%),
  radial-gradient(1000px 720px at 94% 110%,rgba(77,148,255,.10),transparent 60%),
  var(--bg);background-attachment:fixed}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
a{color:inherit;text-decoration:none}

/* ---- nav ---- */
.nav{background:color-mix(in srgb,var(--bg) 80%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.nav-in{max-width:1040px;margin:0 auto;padding:13px 20px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:11px;font-weight:900;font-size:21px}
.brand .logo{width:38px;height:38px;display:grid;place-items:center;background:var(--grad);border-radius:12px;box-shadow:0 6px 16px -4px rgba(47,123,247,.55)}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--muted);margin-top:-3px}
.nav-links{display:flex;gap:4px;margin-inline-start:auto}
.nav-links a{padding:9px 15px;border-radius:11px;font-weight:700;font-size:15px;color:var(--muted);transition:.15s}
.nav-links a:hover{color:var(--brand);background:var(--brand-soft)}
.nav-links a.active{color:var(--brand);background:var(--brand-soft)}
.nav-cta{background:var(--brand);color:#fff;padding:10px 20px;border-radius:12px;font-weight:800;font-size:14.5px;transition:.15s;box-shadow:0 4px 0 0 var(--brand-d)}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 5px 0 0 var(--brand-d)}
.nav-cta:active{transform:translateY(3px);box-shadow:0 1px 0 0 var(--brand-d)}
.burger{display:none;color:var(--ink)}
.themebtn,.acctbtn{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--card);color:var(--muted);border:1.5px solid var(--line);flex:none;transition:.15s}
.themebtn:hover,.acctbtn:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-1px)}

/* ---- buttons ---- */
.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:800;font-size:16px;padding:15px 30px;border-radius:var(--radS);transition:.14s;box-shadow:0 4px 0 0 var(--brand-d),0 14px 26px -10px rgba(47,123,247,.5)}
.btn:hover{transform:translateY(-1px);box-shadow:0 5px 0 0 var(--brand-d),0 18px 30px -10px rgba(47,123,247,.55)}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 0 var(--brand-d)}
.btn.ghost{background:var(--card);color:var(--brand);border:2px solid var(--line);box-shadow:0 4px 0 0 var(--line)}
.btn.ghost:hover{border-color:var(--brand);box-shadow:0 5px 0 0 var(--brand-soft)}
.btn.amber{background:var(--amber);box-shadow:0 4px 0 0 #c97f06,0 14px 26px -10px rgba(245,159,10,.5)}
.btn.amber:hover{box-shadow:0 5px 0 0 #c97f06,0 18px 30px -10px rgba(245,159,10,.55)}
.btn.amber:active{box-shadow:0 1px 0 0 #c97f06}

/* ---- hero ---- */
.hero{position:relative;text-align:center;padding:64px 0 36px}
.hero::before{content:"";position:absolute;top:-90px;left:50%;transform:translateX(-50%);width:860px;height:540px;background:radial-gradient(closest-side,rgba(47,123,247,.34),transparent 70%),radial-gradient(closest-side,rgba(47,123,247,.26),transparent 70%),radial-gradient(closest-side,rgba(47,123,247,.28),transparent 70%);background-position:22% 32%,82% 22%,55% 78%;background-repeat:no-repeat;background-size:52% 62%,48% 54%,46% 52%;filter:blur(10px);z-index:-1;pointer-events:none}
.pill{display:inline-flex;align-items:center;gap:7px;background:var(--card);border:1.5px solid var(--line);color:var(--brand);font-weight:800;font-size:13.5px;padding:8px 17px;border-radius:30px;margin-bottom:22px;box-shadow:var(--shadow-sm)}
.hero h1{font-size:46px;font-weight:900;line-height:1.18;letter-spacing:-1px}
.hero h1 .hl{background:linear-gradient(100deg,var(--brand),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);font-size:18.5px;max-width:600px;margin:18px auto 30px;line-height:1.75}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.trust{margin-top:24px;color:var(--muted);font-size:14px;font-weight:700}

/* ---- sections ---- */
.section{padding:54px 0}
.section.alt{background:linear-gradient(180deg,transparent,rgba(47,123,247,.10) 34%,rgba(47,123,247,.08) 66%,transparent)}
.shead{text-align:center;max-width:640px;margin:0 auto 38px}
.shead h2{font-size:33px;font-weight:900;letter-spacing:-.5px}
.shead p{color:var(--muted);font-size:17px;margin-top:12px}

/* ---- steps ---- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:28px 24px;box-shadow:var(--shadow-sm);transition:.16s}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step .n{counter-increment:s;width:48px;height:48px;border-radius:14px;background:var(--grad);color:#fff;font-weight:900;font-size:19px;line-height:1;display:flex;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:0 8px 18px -6px rgba(47,123,247,.6)}
.step .n::before{content:counter(s,decimal-leading-zero)}
.step h3{font-size:19px;margin-bottom:7px;font-weight:800}
.step p{color:var(--muted);font-size:15px}

/* ---- features ---- */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:24px;box-shadow:var(--shadow-sm);transition:.16s}
.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feat .ic{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;color:#fff;margin-bottom:14px;box-shadow:0 8px 18px -6px rgba(20,50,110,.4)}
.features .feat:nth-child(1) .ic{background:linear-gradient(135deg,#2f7bf7,#4f97ff)}
.features .feat:nth-child(2) .ic{background:linear-gradient(135deg,#2f7bf7,#1f60d4)}
.features .feat:nth-child(3) .ic{background:linear-gradient(135deg,#2f7bf7,#1f60d4)}
.features .feat:nth-child(4) .ic{background:linear-gradient(135deg,#2f7bf7,#1f60d4)}
.feat h3{font-size:17px;margin-bottom:6px;font-weight:800}
.feat p{color:var(--muted);font-size:14.5px}

/* ---- custom practice (filters) ---- */
.filtercard{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:24px;box-shadow:var(--shadow-sm);margin:6px 0 26px}
.filtercard h3{font-size:19px;font-weight:900;margin-bottom:3px}
.filtercard .fc-sub{color:var(--muted);font-size:14px;margin-bottom:16px}
.fgroup{margin-bottom:14px}
.fgroup label{display:block;font-weight:800;font-size:13px;color:var(--muted);margin-bottom:8px}
.fchips{display:flex;flex-wrap:wrap;gap:8px}
.fchip{padding:8px 15px;border-radius:30px;font-weight:800;font-size:13.5px;background:var(--bg);color:var(--muted);border:1.5px solid var(--line);transition:.13s}
.fchip:hover{border-color:var(--brand);color:var(--brand)}
.fchip.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.fstart{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:18px;flex-wrap:wrap}
.fc-match{font-weight:900;font-size:14.5px;color:var(--brand)}
.fstart .btn{padding:12px 26px;font-size:15px}
.btn:disabled{opacity:.45;cursor:default;transform:none}

/* ---- lessons (gamified) ---- */
.unit-tag{margin:30px 0 15px;font-weight:900;font-size:16.5px;color:var(--ink);display:flex;align-items:center;gap:11px}
.unit-tag::before{content:"";width:8px;height:24px;background:var(--grad);border-radius:5px}
.lessons{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}
.lcard{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow-sm);text-align:start;transition:.16s;display:flex;align-items:center;gap:16px;width:100%}
.lcard:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:transparent}
.lcard .ln{width:48px;height:48px;border-radius:15px;background:var(--grad);color:#fff;font-weight:900;font-size:20px;line-height:1;display:flex;align-items:center;justify-content:center;flex:none;transition:.16s;box-shadow:0 7px 15px -5px rgba(47,123,247,.55)}
.lcard:hover .ln{transform:scale(1.06);box-shadow:0 10px 20px -5px rgba(47,123,247,.7)}
.lcard .lt{flex:1}.lcard .lt b{font-size:16.5px;font-weight:800;display:block;line-height:1.4}
.lcard .lt small{color:var(--muted);font-size:12.5px;font-weight:700}
.lcard .arr{color:var(--brand);font-size:22px;font-weight:800}

/* ---- tests ---- */
.tests{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.tcard{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);padding:26px;box-shadow:var(--shadow-sm);transition:.16s}
.tcard:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.tcard .tk{font-weight:800;font-size:12.5px;color:var(--accent-d);background:var(--accent-soft);display:inline-block;padding:5px 13px;border-radius:30px;margin-bottom:13px}
.tcard h3{font-size:20px;margin-bottom:7px;font-weight:800}
.tcard p{color:var(--muted);font-size:14.5px;margin-bottom:16px}
.tcard .meta{display:flex;gap:16px;color:var(--muted);font-size:13.5px;font-weight:800;margin-bottom:18px}

/* ---- page header ---- */
.phead{padding:46px 0 8px}
.phead h1{font-size:36px;font-weight:900;letter-spacing:-.5px}
.phead p{color:var(--muted);font-size:17px;margin-top:9px;max-width:660px}

/* ---- subject + lang + tabs ---- */
.subjbar{display:flex;gap:10px;margin:8px 0 20px;flex-wrap:wrap}
.subjtab{padding:11px 24px;border-radius:14px;font-weight:800;font-size:15.5px;background:var(--card);color:var(--muted);border:2px solid var(--line);transition:.15s}
.subjtab.active{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:0 4px 0 0 var(--brand-d)}
.subjtab:hover:not(.active){border-color:var(--brand);color:var(--brand)}
.langbar{display:flex;gap:3px;background:var(--card);border:1.5px solid var(--line);border-radius:11px;padding:3px}
.langtab{padding:6px 12px;border-radius:8px;font-weight:800;font-size:13px;color:var(--muted)}
.langtab.active{background:var(--brand);color:#fff}

/* ---- modal ---- */
.overlay{position:fixed;inset:0;background:rgba(20,18,50,.55);backdrop-filter:blur(4px);display:none;place-items:center;z-index:60;padding:18px}
.overlay.show{display:grid}
.modal{background:var(--card);border-radius:24px;padding:30px;max-width:440px;width:100%;box-shadow:var(--shadow);border:1px solid var(--line)}
.modal h3{font-size:22px;margin-bottom:4px;font-weight:900}
.modal .msub{color:var(--muted);font-size:14px;margin-bottom:20px}
.diffs{display:flex;flex-direction:column;gap:11px}
.dchip{display:flex;align-items:center;gap:13px;border:2px solid var(--line);border-radius:15px;padding:14px 16px;font-weight:800;font-size:16px;background:var(--card);transition:.14s;text-align:start;width:100%}
.dchip:hover{border-color:var(--brand);background:var(--brand-soft);transform:translateY(-1px)}
.dchip .dot{width:13px;height:13px;border-radius:50%;flex:none}
.dchip .cnt{margin-inline-start:auto;color:var(--muted);font-weight:700;font-size:13px}
.modal .x{margin-top:16px;text-align:center;color:var(--muted);font-weight:800;font-size:14px;cursor:pointer}

/* ---- quiz ---- */
#screen{display:none}
.quizbox{max-width:780px;margin:0 auto;padding:26px 0 60px}
.qbar-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:13px}
.qexit{color:var(--muted);font-weight:800;font-size:14px}
.qtimer{font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand);background:var(--brand-soft);padding:7px 15px;border-radius:30px;font-size:14px}
.progress{height:11px;background:var(--track);border-radius:30px;overflow:hidden;margin:5px 0}
.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--accent));width:0;transition:width .35s;border-radius:30px}
.qmeta{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;font-weight:800;margin:9px 0 17px}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:30px;box-shadow:var(--shadow)}
.qtags{display:flex;gap:8px;margin-bottom:15px;flex-wrap:wrap}
.qtag{display:inline-block;background:var(--brand-soft);color:var(--brand);font-weight:800;font-size:12.5px;padding:5px 13px;border-radius:30px}
.qtag.dtag{color:#fff}
.qstem{font-size:21px;font-weight:800;line-height:1.7;margin-bottom:22px}
.opts{display:flex;flex-direction:column;gap:12px}
.opt{display:flex;align-items:center;gap:14px;background:var(--card);border:2px solid var(--line);border-radius:15px;padding:15px 17px;font-size:16.5px;font-weight:700;text-align:start;transition:.13s;width:100%;color:var(--ink)}
.opt:hover:not(:disabled){border-color:var(--brand);background:var(--brand-soft);transform:translateY(-1px)}
.opt .key{width:32px;height:32px;border-radius:10px;background:var(--bg);color:var(--muted);font-weight:900;font-size:15px;line-height:1;display:flex;align-items:center;justify-content:center;flex:none;transition:.13s}
.opt.correct{border-color:var(--green);background:var(--green-soft)}.opt.correct .key{background:var(--green);color:#fff}
.opt.wrong{border-color:var(--red);background:var(--red-soft)}.opt.wrong .key{background:var(--red);color:#fff}
.opt:disabled{cursor:default}
.explain{margin-top:18px;border-radius:15px;padding:17px 19px;display:none}
.explain.show{display:block}
.explain.ok{background:var(--green-soft);border:1.5px solid color-mix(in srgb,var(--green) 35%,transparent)}
.explain.no{background:var(--red-soft);border:1.5px solid color-mix(in srgb,var(--red) 35%,transparent)}
.explain .v{font-weight:900;margin-bottom:6px}
.explain.ok .v{color:var(--green)}.explain.no .v{color:var(--red)}
.explain p{font-size:15.5px;color:var(--ink);line-height:1.8;opacity:.9}
.qfoot{margin-top:24px;text-align:start}

/* ---- results ---- */
.res{max-width:780px;margin:0 auto;padding:32px 0 60px}
.res-hero{background:var(--card);border:1px solid var(--line);border-radius:26px;padding:34px;box-shadow:var(--shadow);text-align:center;margin-bottom:22px}
.gauge{position:relative;width:200px;height:200px;margin:4px auto 12px}
.gauge svg{transform:rotate(-90deg);display:block;width:100%;height:100%}
.gauge .num{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.gauge .num b{font-size:50px;font-weight:900;line-height:1}
.gauge .num span{font-size:13px;color:var(--muted);font-weight:800}
.band{display:inline-block;font-weight:900;font-size:18px;padding:9px 22px;border-radius:30px;margin-top:6px;color:#fff}
.res-sub{color:var(--muted);margin-top:12px;font-size:15px;font-weight:600}
.breakdown,.review{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow-sm);margin-bottom:22px}
.breakdown h3,.review h3{font-size:19px;margin-bottom:4px;font-weight:900}
.breakdown .h-sub,.review .h-sub{color:var(--muted);font-size:14px;margin-bottom:18px}
.topic{margin-bottom:19px}.topic:last-child{margin-bottom:0}
.topic .t-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.topic .t-name{font-weight:800;font-size:15.5px;display:flex;align-items:center;gap:8px}
.topic .t-pct{font-weight:900;font-variant-numeric:tabular-nums}
.topic .t-bar{height:13px;background:var(--track);border-radius:30px;overflow:hidden}
.topic .t-bar span{display:block;height:100%;border-radius:30px;width:0;transition:width .7s ease}
.tag-weak{font-size:11px;font-weight:900;color:#fff;background:var(--red);padding:2px 10px;border-radius:30px}
.res-cta{background:var(--grad);color:#fff;border-radius:26px;padding:32px;text-align:center;box-shadow:0 24px 50px -16px rgba(47,123,247,.6)}
.res-cta h3{font-size:22px;margin-bottom:8px;font-weight:900}.res-cta p{opacity:.92;margin-bottom:20px;font-size:15px}
.res-cta .btn{background:#fff;color:var(--brand);box-shadow:0 4px 0 0 rgba(0,0,0,.12)}
.res-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---- review ---- */
.rev-filters{display:flex;gap:9px;margin-bottom:18px}
.rev-f{padding:8px 17px;border-radius:11px;font-weight:800;font-size:14px;background:var(--bg);color:var(--muted);border:1.5px solid var(--line)}
.rev-f.active{background:var(--brand-soft);color:var(--brand);border-color:var(--brand-soft)}
.qgrid{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:26px}
.qpill{width:36px;height:36px;border-radius:11px;font-weight:900;font-size:14px;color:#fff;line-height:1;display:flex;align-items:center;justify-content:center;transition:.13s}
.qpill.ok{background:var(--green)}.qpill.no{background:var(--red)}
.qpill:hover{transform:translateY(-2px)}
.qrev{border-top:1px solid var(--line);padding:22px 0}.qrev:last-child{padding-bottom:0}
.qrev-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.qnum{width:30px;height:30px;border-radius:10px;background:var(--bg);color:var(--ink);font-weight:900;font-size:14px;line-height:1;display:flex;align-items:center;justify-content:center;flex:none}
.rev-badge{font-weight:900;font-size:12px;padding:3px 13px;border-radius:30px;color:#fff}
.rev-badge.ok{background:var(--green)}.rev-badge.no{background:var(--red)}
.qrev-lesson{color:var(--muted);font-size:13px;font-weight:800;margin-inline-start:auto}
.qrev-stem{font-size:17px;font-weight:800;line-height:1.7;margin-bottom:13px}
.qrev-opts{display:flex;flex-direction:column;gap:9px;margin-bottom:13px}
.rev-opt{display:flex;align-items:center;gap:11px;border:2px solid var(--line);border-radius:13px;padding:11px 14px;font-size:15px;font-weight:700}
.rev-opt .rev-txt{flex:1}
.rev-opt .rev-key{width:28px;height:28px;border-radius:9px;background:var(--bg);color:var(--muted);font-weight:900;font-size:13px;line-height:1;display:flex;align-items:center;justify-content:center;flex:none}
.rev-opt.c{border-color:var(--green);background:var(--green-soft)}.rev-opt.c .rev-key{background:var(--green);color:#fff}
.rev-opt.w{border-color:var(--red);background:var(--red-soft)}.rev-opt.w .rev-key{background:var(--red);color:#fff}
.rev-mark{font-size:12px;font-weight:900;flex:none}
.rev-opt.c .rev-mark{color:var(--green)}.rev-opt.w .rev-mark{color:var(--red)}
.qrev-exp{background:var(--bg);border-radius:13px;padding:13px 16px;font-size:14.5px;color:var(--ink);line-height:1.8;opacity:.92}
.qrev-exp b{opacity:1;font-weight:900}

/* ---- auth ---- */
.authwrap{min-height:74vh;display:grid;place-items:center;padding:40px 18px}
.authcard{background:var(--card);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow);padding:34px;max-width:430px;width:100%}
.authcard h1{font-size:25px;text-align:center;margin-bottom:5px;font-weight:900}
.authcard .auth-sub{text-align:center;color:var(--muted);font-size:14.5px;margin-bottom:24px}
.authtabs{display:flex;background:var(--bg);border-radius:14px;padding:5px;margin-bottom:22px}
.authtab{flex:1;padding:11px;border-radius:10px;font-weight:800;font-size:15px;color:var(--muted)}
.authtab.active{background:var(--card);color:var(--brand);box-shadow:var(--shadow-sm)}
.field{margin-bottom:15px}
.field label{display:block;font-weight:800;font-size:13.5px;margin-bottom:7px}
.field input{width:100%;padding:13px 15px;border:2px solid var(--line);border-radius:13px;font-family:inherit;font-size:15.5px;background:var(--bg);color:var(--ink)}
.field input:focus{outline:none;border-color:var(--brand)}
.auth-msg{font-size:13.5px;margin:4px 0 12px;min-height:18px;font-weight:700}
.auth-msg.err{color:var(--red)}.auth-msg.ok{color:var(--green)}
.authcard .btn{width:100%;text-align:center}
.auth-alt{text-align:center;color:var(--muted);font-size:13.5px;margin-top:16px}

/* ---- footer ---- */
footer{background:var(--card);border-top:1px solid var(--line);margin-top:46px}
.foot-in{max-width:1040px;margin:0 auto;padding:32px 20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:13.5px;font-weight:600}
.foot-in .brand{font-size:19px}
[data-theme="dark"] .brand .logo{box-shadow:0 6px 16px -4px rgba(0,0,0,.5)}

@media(max-width:760px){
  .nav-links{display:none;position:absolute;top:64px;right:0;left:0;background:var(--card);flex-direction:column;padding:10px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .burger{display:block}
  .hero{padding:44px 0 24px}.hero h1{font-size:32px}.hero p{font-size:16px}
  .steps,.features,.lessons,.tests{grid-template-columns:1fr}
  .features{grid-template-columns:1fr 1fr}
  .shead h2{font-size:25px}.qstem{font-size:19px}.gauge{width:170px;height:170px}.phead h1{font-size:28px}
  .nav-cta{display:none}.hero-mock{max-width:330px}.statschip .st-xp{display:none}
}

/* ---- hero mockup ---- */
.hero-mock{margin:42px auto 6px;max-width:380px;position:relative}
.mock-card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow);text-align:start;animation:float 4.5s ease-in-out infinite}
.mock-tags{display:flex;gap:8px;margin-bottom:6px}
.mock-q{font-weight:800;font-size:16px;margin:12px 0 14px;line-height:1.6}
.mock-opt{border:2px solid var(--line);border-radius:12px;padding:11px 14px;font-weight:700;font-size:14.5px;margin-bottom:9px;display:flex;justify-content:space-between;align-items:center;color:var(--ink)}
.mock-opt:last-child{margin-bottom:0}
.mock-opt.ok{border-color:var(--green);background:var(--green-soft);color:var(--green)}
.mock-badge{position:absolute;background:var(--card);border:1px solid var(--line);border-radius:30px;padding:8px 14px;font-weight:900;font-size:13.5px;box-shadow:var(--shadow);display:flex;align-items:center;gap:6px;animation:float 4.5s ease-in-out infinite}
.mock-badge.b1{top:-16px;inset-inline-start:-10px;color:var(--accent-d);animation-delay:.7s}
.mock-badge.b2{bottom:-16px;inset-inline-end:-10px;color:var(--amber);animation-delay:1.3s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ---- entrance motion ---- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}

/* ---- answer feedback ---- */
@keyframes pop{0%{transform:scale(1)}40%{transform:scale(1.035)}100%{transform:scale(1)}}
.opt.correct{animation:pop .4s ease}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-5px)}40%{transform:translateX(5px)}60%{transform:translateX(-3px)}80%{transform:translateX(3px)}}
.opt.wrong{animation:shake .35s ease}

/* ---- stats chip + toast ---- */
.statschip{display:flex;gap:9px;align-items:center;background:var(--card);border:1.5px solid var(--line);border-radius:30px;padding:6px 13px;font-weight:900;font-size:13.5px;flex:none}
.statschip .st-streak{display:flex;align-items:center;gap:4px;color:var(--amber)}
.statschip .st-xp{display:flex;align-items:center;gap:4px;color:var(--brand)}
.mj-toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,30px);background:var(--ink);color:var(--bg);padding:13px 22px;border-radius:30px;font-weight:800;font-size:15px;box-shadow:0 16px 44px rgba(0,0,0,.32);z-index:9998;display:flex;align-items:center;gap:8px;opacity:0;transition:.42s}
.mj-toast.in{transform:translate(-50%,0);opacity:1}

/* ---- «المعلّم» chat ---- */
.ai-panel{margin-top:15px;display:flex;flex-direction:column;gap:12px}
.ai-btn{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;background:var(--brand-soft);color:var(--brand);border:1.6px solid var(--brand);border-radius:12px;padding:10px 16px;font-weight:800;font-size:14.5px;transition:.14s}
.ai-btn:hover:not(:disabled){background:var(--brand);color:#fff}
.ai-btn:disabled{opacity:.65;cursor:default}
.ai-hint{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;color:var(--brand);font-weight:800;font-size:14px;opacity:.9}
.ai-thread{display:flex;flex-direction:column;gap:9px}
.ai-thread:empty{display:none}
.ai-msg{max-width:88%;padding:12px 15px;border-radius:14px;font-size:14.7px;line-height:1.8;white-space:normal;word-wrap:break-word}
.ai-msg.ai-m{align-self:flex-start;background:var(--brand-soft);border:1px solid color-mix(in srgb,var(--brand) 22%,transparent);color:var(--ink);border-start-start-radius:5px}
.ai-msg.ai-u{align-self:flex-end;background:var(--brand);color:#fff;border-start-end-radius:5px}
.ai-who{display:block;font-weight:900;font-size:12px;color:var(--brand);margin-bottom:5px}
.ai-typing{display:inline-flex;gap:4px;align-items:center;padding:14px 16px}
.ai-typing span{width:7px;height:7px;border-radius:50%;background:var(--brand);opacity:.5;animation:aiblink 1s infinite}
.ai-typing span:nth-child(2){animation-delay:.2s}.ai-typing span:nth-child(3){animation-delay:.4s}
@keyframes aiblink{0%,60%,100%{opacity:.28;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}
.ai-ask{display:flex;gap:8px;align-items:stretch}
.ai-input{flex:1;min-width:0;background:var(--card);border:1.5px solid var(--line);border-radius:12px;padding:11px 15px;font:inherit;font-size:14.5px;color:var(--ink);transition:.14s}
.ai-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.ai-input::placeholder{color:var(--muted)}
.ai-send{flex:0 0 auto;background:var(--brand);color:#fff;border:none;border-radius:12px;padding:0 20px;font-weight:800;font-size:14.5px;transition:.14s}
.ai-send:hover{background:var(--brand-d)}
.ai-send:active{transform:translateY(1px)}

/* ---- secret challenge popup ---- */
.overlay.premium{background:rgba(20,10,45,.6)}
.overlay.premium .premium-card{position:relative;background:var(--card);border-radius:26px;padding:36px 28px 28px;max-width:400px;width:100%;text-align:center;box-shadow:0 34px 90px -20px rgba(30,86,214,.65);border:1.5px solid color-mix(in srgb,#1e56d6 42%,transparent);overflow:hidden;animation:popIn .42s cubic-bezier(.2,.9,.3,1.25)}
@keyframes popIn{from{transform:scale(.85);opacity:0}to{transform:scale(1);opacity:1}}
.premium-glow{position:absolute;top:-70px;left:50%;transform:translateX(-50%);width:320px;height:220px;background:radial-gradient(closest-side,rgba(30,86,214,.4),transparent 70%);pointer-events:none}
.premium-icon{position:relative;width:74px;height:74px;border-radius:21px;margin:0 auto 16px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,#1e56d6,#4f97ff);box-shadow:0 16px 34px -8px rgba(30,86,214,.75)}
.premium-tag{position:relative;display:inline-block;font-weight:900;font-size:11.5px;letter-spacing:1.5px;color:#1e56d6;background:rgba(30,86,214,.13);padding:5px 14px;border-radius:30px;margin-bottom:11px}
.overlay.premium h3{position:relative;font-size:25px;font-weight:900;margin-bottom:8px}
.overlay.premium p{position:relative;color:var(--muted);font-size:15.5px;margin-bottom:22px;line-height:1.75}
.overlay.premium .btn{position:relative;width:100%;background:linear-gradient(135deg,#1e56d6,#4f97ff);box-shadow:0 4px 0 0 #123f9e,0 16px 30px -10px rgba(30,86,214,.65)}
.overlay.premium .btn:hover{box-shadow:0 5px 0 0 #123f9e,0 20px 34px -10px rgba(30,86,214,.7)}
.overlay.premium .btn:active{transform:translateY(3px);box-shadow:0 1px 0 0 #123f9e}
.overlay.premium .x{position:relative;margin-top:15px;color:var(--muted);font-weight:800;font-size:14px;cursor:pointer}
[data-theme="dark"] .premium-tag{background:rgba(47,123,247,.2)}