/* ===== مغامرة التقريب — نظام التصميم ===== */
:root{
  --bg:#EFF6FF;
  --bg-2:#E4EEFF;
  --surface:#FFFFFF;
  --surface-2:#F6F9FF;
  --ink:#0F172A;
  --muted:#5B6B8C;
  --border:#E1EAFB;
  --primary:#2563EB;
  --primary-d:#1B4FD8;
  --primary-l:#DCE8FF;
  --amber:#F59E0B;
  --amber-l:#FFF1D6;
  --accent:#EC4899;
  --accent-l:#FFE1F1;
  --green:#15A34A;
  --green-l:#DCF7E6;
  --red:#DC2626;
  --red-l:#FFE4E4;
  --violet:#7C3AED;
  --r-card:32px;
  --r-btn:20px;
  --r-pill:999px;
  --clay:0 14px 28px rgba(37,99,235,.13), inset 0 -7px 0 rgba(15,23,42,.06), inset 0 7px 14px rgba(255,255,255,.9);
  --clay-sm:0 8px 16px rgba(37,99,235,.12), inset 0 -5px 0 rgba(15,23,42,.06), inset 0 5px 10px rgba(255,255,255,.9);
  --clay-press:0 4px 10px rgba(37,99,235,.14), inset 0 -3px 0 rgba(15,23,42,.07), inset 0 4px 8px rgba(255,255,255,.8);
  --font-d:'Baloo Bhaijaan 2','Almarai',system-ui,sans-serif;
  --font-b:'Almarai','Segoe UI',system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-b);
  background:linear-gradient(180deg,var(--bg) 0%,var(--bg-2) 100%);
  color:var(--ink);
  min-height:100dvh;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,.disp{font-family:var(--font-d);font-weight:800;letter-spacing:0}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
:focus-visible{outline:3px solid var(--violet);outline-offset:3px;border-radius:12px}
.hidden{display:none !important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* خلفية عائمة */
.blobs{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.blob{position:absolute;border-radius:50%;filter:blur(6px);opacity:.5}
.b1{width:320px;height:320px;background:radial-gradient(circle at 35% 35%,#BFD8FF,#8FB8FF);top:-90px;inset-inline-start:-70px;animation:drift 16s ease-in-out infinite}
.b2{width:260px;height:260px;background:radial-gradient(circle at 35% 35%,#FFE3AF,#FFC864);bottom:-80px;inset-inline-end:-60px;animation:drift 20s ease-in-out infinite reverse}
.b3{width:200px;height:200px;background:radial-gradient(circle at 35% 35%,#FFCDE7,#FFA8D3);top:45%;inset-inline-end:12%;animation:drift 24s ease-in-out infinite}
@keyframes drift{0%,100%{transform:translate3d(0,0,0)}50%{transform:translate3d(14px,-22px,0)}}

/* الشريط العلوي */
.topbar{
  position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px clamp(12px,3vw,28px);
  background:rgba(255,255,255,.78);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.brand{display:flex;align-items:center;gap:12px;padding:6px;border-radius:var(--r-pill);transition:transform .18s ease}
.brand:hover{transform:translateY(-2px)}
.brand-mark{
  display:grid;place-items:center;width:44px;height:44px;flex:0 0 44px;border-radius:16px;
  font-family:var(--font-d);font-weight:800;font-size:17px;color:#fff;
  background:linear-gradient(150deg,#4F86F7,#2563EB);box-shadow:var(--clay-sm)
}
.brand-text{display:flex;flex-direction:column;text-align:start;line-height:1.15}
.brand-text strong{font-family:var(--font-d);font-size:clamp(15px,2.4vw,19px);font-weight:800}
.brand-text small{color:var(--muted);font-size:11px;font-weight:700}
.top-actions{display:flex;gap:8px}

/* أزرار */
.icon-btn{
  display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:var(--r-pill);
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--clay-sm);
  font-size:13px;font-weight:700;color:var(--ink);transition:transform .16s ease,box-shadow .16s ease
}
.icon-btn .ic{width:19px;height:19px;display:block}
.icon-btn:hover{transform:translateY(-2px);box-shadow:var(--clay)}
.icon-btn:active{transform:scale(.95);box-shadow:var(--clay-press)}
.icon-btn[aria-pressed="false"]{color:var(--muted);opacity:.72}
.icon-btn[aria-pressed="false"] .lbl::after{content:" (مغلق)";font-size:11px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:15px 30px;border-radius:var(--r-btn);font-family:var(--font-d);
  font-size:clamp(16px,2.3vw,19px);font-weight:700;color:#fff;
  background:linear-gradient(150deg,#4F86F7,#2563EB);box-shadow:var(--clay);
  transition:transform .16s ease,box-shadow .16s ease,filter .2s ease
}
.btn .ic{width:22px;height:22px;display:block}
.btn:hover{transform:translateY(-3px);box-shadow:0 20px 34px rgba(37,99,235,.26),inset 0 -7px 0 rgba(15,23,42,.06),inset 0 7px 14px rgba(255,255,255,.9)}
.btn:active{transform:scale(.96);box-shadow:var(--clay-press)}
.btn.amber{background:linear-gradient(150deg,#FFC64D,#F59E0B);box-shadow:0 14px 28px rgba(245,158,11,.28),inset 0 -7px 0 rgba(120,53,15,.12),inset 0 7px 14px rgba(255,255,255,.7);color:#4A2B00}
.btn.amber:hover{box-shadow:0 20px 34px rgba(245,158,11,.34),inset 0 -7px 0 rgba(120,53,15,.12),inset 0 7px 14px rgba(255,255,255,.7)}
.btn.pink{background:linear-gradient(150deg,#FF7BC0,#EC4899);box-shadow:0 14px 28px rgba(236,72,153,.28),inset 0 -7px 0 rgba(112,26,79,.14),inset 0 7px 14px rgba(255,255,255,.6)}
.btn.ghost{background:var(--surface);color:var(--primary-d);border:2px solid var(--primary-l);box-shadow:var(--clay-sm)}
.btn.sm{padding:11px 20px;font-size:15px;border-radius:16px}
.btn.wide{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* الحاويات */
.app{position:relative;z-index:1;max-width:1080px;margin:0 auto;padding:clamp(14px,3vw,26px) clamp(12px,3vw,24px) 40px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--clay);padding:clamp(18px,3vw,30px)}
.row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.between{justify-content:space-between}
.center{text-align:center}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(248px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.fade{animation:fadeUp .45s cubic-bezier(.2,.9,.3,1.1) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes pop{0%{transform:scale(.82);opacity:0}70%{transform:scale(1.05)}100%{transform:scale(1);opacity:1}}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-9px)}40%{transform:translateX(9px)}60%{transform:translateX(-6px)}80%{transform:translateX(6px)}}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}

/* ===== الشاشة الرئيسية ===== */
.hero{display:grid;gap:clamp(16px,3vw,26px);grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);align-items:center}
@media (max-width:880px){.hero{grid-template-columns:1fr}}
.eyebrow{display:inline-flex;align-items:center;gap:7px;padding:7px 15px;border-radius:var(--r-pill);background:var(--primary-l);color:var(--primary-d);font-size:12.5px;font-weight:800;margin-bottom:12px}
.eyebrow .ic{width:16px;height:16px}
h1.hero-title{font-size:clamp(29px,6vw,50px);line-height:1.08;margin-bottom:10px}
h1.hero-title em{font-style:normal;color:var(--primary);position:relative;z-index:0;white-space:nowrap}
h1.hero-title em::after{content:"";position:absolute;inset-inline:-4px;bottom:2px;height:11px;background:var(--amber);opacity:.42;border-radius:6px;z-index:-1}
.lead{color:var(--muted);font-size:clamp(14.5px,2.2vw,17px);font-weight:700;line-height:1.75;max-width:48ch;margin-bottom:18px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}

/* بطاقة القاعدة المصوّرة */
.rule-visual{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--clay);padding:clamp(16px,2.6vw,24px);text-align:center}
.rule-visual h3{font-size:clamp(16px,2.4vw,20px);margin-bottom:6px}
.rule-visual p{color:var(--muted);font-size:13px;font-weight:700;margin-bottom:14px}
.zone-label{font-size:12.5px;font-weight:800;margin-bottom:8px}
.zone-label.down{color:var(--primary-d)}
.zone-label.up{color:#B0246B}
.digit-strip{display:flex;gap:6px;justify-content:center;direction:ltr;margin-bottom:14px}
.digit-strip span{
  width:clamp(30px,6.4vw,42px);height:clamp(38px,7.4vw,50px);display:grid;place-items:center;
  font-family:var(--font-d);font-size:clamp(18px,3.4vw,24px);font-weight:800;border-radius:14px;
  background:var(--primary-l);color:var(--primary-d);box-shadow:inset 0 -4px 0 rgba(15,23,42,.07)
}
.digit-strip span.up{background:var(--accent-l);color:#B0246B}
.digit-strip .sep{width:3px;height:auto;background:var(--border);border-radius:2px}
.mini-tenline{display:flex;align-items:center;justify-content:center;gap:0;direction:ltr;margin-top:4px}
.mini-tenline .cap{font-family:var(--font-d);font-weight:800;font-size:clamp(17px,3vw,22px);color:var(--primary-d)}
.mini-tenline .mid{font-family:var(--font-d);font-weight:800;font-size:clamp(14px,2.5vw,18px);color:var(--accent);padding:0 clamp(8px,3vw,20px);position:relative}
.mini-tenline .mid::before,.mini-tenline .mid::after{content:"";position:absolute;top:50%;width:clamp(10px,4vw,30px);height:3px;background:var(--border);border-radius:2px}
.mini-tenline .mid::before{inset-inline-end:100%}
.mini-tenline .mid::after{inset-inline-start:100%}

/* بطاقات الألعاب */
.modes-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:clamp(26px,4vw,40px) 0 14px}
.modes-head h2{font-size:clamp(20px,3.4vw,27px)}
.modes-head small{color:var(--muted);font-weight:700;font-size:13px}
.mode-card{
  position:relative;display:flex;flex-direction:column;gap:10px;text-align:start;padding:20px;
  background:var(--surface);border:1px solid var(--border);border-radius:26px;box-shadow:var(--clay-sm);
  transition:transform .18s ease,box-shadow .18s ease
}
.mode-card:hover{transform:translateY(-5px);box-shadow:var(--clay)}
.mode-card:active{transform:scale(.98)}
.mode-card .m-ic{
  width:52px;height:52px;border-radius:18px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(150deg,#4F86F7,#2563EB);box-shadow:var(--clay-sm)
}
.mode-card .m-ic .ic{width:26px;height:26px}
.mode-card.amber .m-ic{background:linear-gradient(150deg,#FFC64D,#F59E0B)}
.mode-card.pink .m-ic{background:linear-gradient(150deg,#FF7BC0,#EC4899)}
.mode-card.green .m-ic{background:linear-gradient(150deg,#34D399,#15A34A)}
.mode-card h3{font-size:19px}
.mode-card p{color:var(--muted);font-size:13.5px;font-weight:700;line-height:1.7}
.mode-meta{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:6px;flex-wrap:wrap}
.pill{display:inline-flex;align-items:center;gap:5px;padding:5px 11px;border-radius:var(--r-pill);background:var(--surface-2);border:1px solid var(--border);font-size:12px;font-weight:800;color:var(--muted)}
.pill .ic{width:14px;height:14px}
.pill.gold{background:#FFF7E3;border-color:#FFE1A8;color:#9A6100}
.mode-card .go{position:absolute;inset-inline-end:18px;top:18px;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--primary-l);color:var(--primary-d)}
.mode-card .go .ic{width:18px;height:18px}

/* ===== شريط الحالة داخل اللعبة ===== */
.hud{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:space-between;margin-bottom:14px}
.hud-chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:7px;padding:9px 15px;border-radius:var(--r-pill);background:var(--surface);border:1px solid var(--border);box-shadow:var(--clay-sm);font-size:13.5px;font-weight:800}
.chip .ic{width:17px;height:17px;color:var(--primary)}
.chip.score .ic{color:var(--amber)}
.chip.streak .ic{color:var(--accent)}
.chip.time{min-width:118px;justify-content:center}
.chip.time.low{background:var(--red-l);border-color:#FBD0D0;color:var(--red)}
.bar{height:13px;border-radius:var(--r-pill);background:var(--primary-l);overflow:hidden;box-shadow:inset 0 2px 5px rgba(15,23,42,.12)}
.bar > i{display:block;height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,#4F86F7,#2563EB);transition:width .35s ease;width:0}
.bar.slim{height:9px;margin-bottom:16px}
.bar.warn > i{background:linear-gradient(90deg,#FFC64D,#F59E0B)}
.bar.danger > i{background:linear-gradient(90deg,#F87171,#DC2626)}

/* ===== لوحة السؤال ===== */
.stage{padding:clamp(16px,3vw,28px)}
.ask{text-align:center;margin-bottom:clamp(14px,2.6vw,22px)}
.ask .q-text{color:var(--muted);font-size:clamp(14px,2.3vw,17px);font-weight:800;margin-bottom:10px}
.big-num{
  font-family:var(--font-d);font-weight:800;line-height:1;font-size:clamp(52px,13vw,96px);
  color:var(--primary-d);display:inline-block;padding:6px 26px;border-radius:28px;
  background:var(--primary-l);box-shadow:inset 0 -6px 0 rgba(15,23,42,.07),0 12px 22px rgba(37,99,235,.16);
  animation:pop .4s cubic-bezier(.2,.9,.3,1.2) both
}
.big-num.approx::after{content:"≈ ?";font-size:.5em;color:var(--muted);margin-inline-start:14px}

/* ===== خط الأعداد ===== */
.nl-wrap{direction:ltr;margin:clamp(18px,3vw,28px) 0 4px;padding:0 clamp(26px,5vw,34px)}
.nl{position:relative;height:96px;direction:ltr}
.nl-track{position:absolute;top:40px;left:0;right:0;height:12px;border-radius:var(--r-pill);display:flex;overflow:hidden;box-shadow:inset 0 2px 5px rgba(15,23,42,.12)}
.nl-track i{display:block;height:100%;flex:1 1 50%}
.nl-track .down{background:linear-gradient(90deg,#CFE0FF,#9CC0FF)}
.nl-track .up{background:linear-gradient(90deg,#FFD9EC,#FFA8D3)}
.nl-ticks{position:absolute;top:40px;left:0;right:0;height:12px;display:flex;justify-content:space-between}
.nl-tick{position:relative;width:0;height:12px;display:grid;place-items:center}
.nl-tick b{width:13px;height:13px;border-radius:50%;background:#fff;border:3px solid #9CC0FF;box-shadow:0 2px 5px rgba(15,23,42,.16);transition:transform .25s ease,border-color .25s ease}
.nl-tick span{position:absolute;top:26px;left:50%;transform:translateX(-50%);font-family:var(--font-d);font-size:12px;font-weight:700;color:var(--muted);white-space:nowrap}
.nl-tick.major b{width:19px;height:19px;border-width:4px;border-color:var(--primary)}
.nl-tick.major span{font-size:clamp(17px,3.2vw,22px);font-weight:800;color:var(--primary-d)}
.nl-tick.mid b{border-color:var(--accent);background:var(--accent-l)}
.nl-tick.mid span{color:#B0246B;font-weight:800;font-size:13.5px}
.nl-tick.hit b{transform:scale(1.55);border-color:var(--green);background:var(--green)}
.nl-tick.hit span{color:#0B6B30}
.nl-marker{
  position:absolute;top:0;left:0;transform:translateX(-50%);
  transition:left .6s cubic-bezier(.25,.9,.3,1.15),background .3s ease;
  background:var(--ink);color:#fff;font-family:var(--font-d);font-weight:800;font-size:15px;
  padding:5px 13px;border-radius:14px;box-shadow:0 8px 16px rgba(15,23,42,.24);white-space:nowrap
}
.nl-marker::after{content:"";position:absolute;top:100%;left:50%;transform:translateX(-50%);border:7px solid transparent;border-top-color:var(--ink);transition:border-top-color .3s ease}
.nl-marker.hit{background:var(--green);animation:pulse .7s ease 2}
.nl-marker.hit::after{border-top-color:var(--green)}
.nl-legend{display:flex;justify-content:space-between;direction:ltr;margin-top:2px;font-size:11.5px;font-weight:800;color:var(--muted)}
.nl-legend .m{color:var(--accent)}
.nl-legend .d{color:var(--primary-d)}
@media (max-width:520px){.nl-tick:not(.major):not(.mid) span{display:none}.nl{height:84px}}

/* ===== الخيارات ===== */
.opts{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));margin-top:8px}
.opt{
  padding:clamp(16px,3vw,26px) 12px;border-radius:24px;background:var(--surface);border:2px solid var(--border);
  box-shadow:var(--clay-sm);font-family:var(--font-d);font-weight:800;font-size:clamp(28px,6vw,42px);color:var(--primary-d);
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease
}
.opt:hover:not(:disabled){transform:translateY(-4px);border-color:#9CC0FF;box-shadow:var(--clay)}
.opt:active:not(:disabled){transform:scale(.96)}
.opt.correct{background:var(--green-l);border-color:var(--green);color:#0B6B30;animation:pulse .5s ease 2}
.opt.wrong{background:var(--red-l);border-color:var(--red);color:#A01515;animation:shake .4s ease}
.opt:disabled{cursor:default;opacity:.62}
.opt.correct:disabled,.opt.wrong:disabled{opacity:1}
.opt small{display:block;font-family:var(--font-b);font-size:12px;font-weight:800;color:var(--muted);margin-top:4px}

/* ===== لوحة التغذية الراجعة ===== */
.feedback{margin-top:16px;border-radius:24px;padding:16px 18px;display:none;gap:12px;align-items:flex-start;animation:fadeUp .3s ease both}
.feedback.show{display:flex}
.feedback.ok{background:var(--green-l);border:2px solid #A7E8C1}
.feedback.no{background:var(--red-l);border:2px solid #F8C4C4}
.fb-ic{width:44px;height:44px;flex:0 0 44px;border-radius:14px;display:grid;place-items:center;color:#fff;background:var(--green)}
.feedback.no .fb-ic{background:var(--red)}
.fb-ic .ic{width:24px;height:24px}
.fb-body h4{font-size:17px;margin-bottom:3px}
.fb-body p{font-size:13.5px;font-weight:700;color:#25405B;line-height:1.7}
.feedback.no .fb-body p{color:#7A2B2B}
.fb-eq{font-family:var(--font-d);font-weight:800;font-size:17px;color:#0B6B30;direction:ltr;display:inline-block}

/* ===== مختبر خط الأعداد ===== */
.lab-readout{text-align:center;margin:6px 0 2px}
.lab-eq{font-family:var(--font-d);font-weight:800;font-size:clamp(28px,7vw,50px);color:var(--primary-d);direction:ltr}
.lab-eq b{color:var(--green)}
.lab-note{margin-top:10px;background:var(--surface-2);border:2px dashed var(--border);border-radius:22px;padding:14px 16px;font-size:14px;font-weight:800;color:#25405B;line-height:1.8}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:16px;border-radius:var(--r-pill);background:linear-gradient(90deg,#9CC0FF,#FFA8D3);box-shadow:inset 0 2px 5px rgba(15,23,42,.18);margin:22px 0 6px;direction:ltr}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:38px;height:38px;border-radius:50%;background:linear-gradient(150deg,#FFF,#E9F0FF);border:5px solid var(--primary);box-shadow:0 8px 16px rgba(37,99,235,.32);cursor:grab}
input[type=range]::-moz-range-thumb{width:32px;height:32px;border-radius:50%;background:#fff;border:5px solid var(--primary);box-shadow:0 8px 16px rgba(37,99,235,.32);cursor:grab}
.quick-row{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:14px}

/* ===== لوحة الأرقام (وضع الكتابة) ===== */
.answer-box{
  font-family:var(--font-d);font-weight:800;font-size:clamp(38px,9vw,62px);color:var(--primary-d);direction:ltr;
  min-height:96px;display:grid;place-items:center;border-radius:24px;background:var(--surface-2);
  border:3px dashed #C3D6FB;margin:8px auto 16px;max-width:340px;width:100%;padding:8px
}
.answer-box.empty{color:#A9BADA;font-size:clamp(20px,4vw,26px)}
.answer-box.ok{border-style:solid;border-color:var(--green);background:var(--green-l);color:#0B6B30}
.answer-box.no{border-style:solid;border-color:var(--red);background:var(--red-l);color:#A01515;animation:shake .4s ease}
.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;max-width:340px;margin:0 auto}
.key{
  padding:14px 0;border-radius:18px;background:var(--surface);border:1px solid var(--border);box-shadow:var(--clay-sm);
  font-family:var(--font-d);font-size:24px;font-weight:800;color:var(--primary-d);transition:transform .14s ease,box-shadow .14s ease
}
.key:hover{transform:translateY(-3px);box-shadow:var(--clay)}
.key:active{transform:scale(.94);box-shadow:var(--clay-press)}
.key.util{font-size:15px;color:var(--muted);background:var(--surface-2)}
.key.wide{grid-column:span 1}

/* ===== قطار الأعداد (السحب والإفلات) ===== */
.platforms{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));margin:8px 0 20px}
.platform{
  border-radius:26px;border:3px dashed #C3D6FB;background:var(--surface-2);padding:12px;min-height:186px;
  display:flex;flex-direction:column;align-items:center;gap:8px;transition:background .2s ease,border-color .2s ease,transform .2s ease
}
.platform.over{border-color:var(--primary);background:var(--primary-l);transform:translateY(-4px)}
.platform.good{border-color:var(--green);background:var(--green-l);border-style:solid}
.platform.bad{border-color:var(--red);background:var(--red-l);animation:shake .4s ease}
.platform-head{display:flex;align-items:center;gap:7px;font-family:var(--font-d);font-weight:800;font-size:20px;color:var(--primary-d)}
.platform-head .ic{width:19px;height:19px}
.platform-slot{display:flex;flex-wrap:wrap;gap:7px;justify-content:center;align-content:flex-start;flex:1;width:100%}
.tiles{display:flex;flex-wrap:wrap;gap:11px;justify-content:center;min-height:74px}
.num-tile{
  display:grid;place-items:center;min-width:78px;padding:14px 16px;border-radius:20px;cursor:grab;
  font-family:var(--font-d);font-weight:800;font-size:clamp(22px,4.6vw,30px);color:#fff;direction:ltr;
  background:linear-gradient(150deg,#4F86F7,#2563EB);box-shadow:var(--clay);
  transition:transform .16s ease,box-shadow .16s ease,opacity .2s ease
}
.num-tile:nth-child(3n){background:linear-gradient(150deg,#FFC64D,#F59E0B);color:#4A2B00}
.num-tile:nth-child(3n+2){background:linear-gradient(150deg,#FF7BC0,#EC4899)}
.num-tile.amber{background:linear-gradient(150deg,#FFC64D,#F59E0B);color:#4A2B00}
.num-tile.pink{background:linear-gradient(150deg,#FF7BC0,#EC4899)}
.num-tile.sel{transform:translateY(-6px) scale(1.06);box-shadow:0 18px 30px rgba(37,99,235,.3);outline:4px solid var(--violet);outline-offset:3px}
.num-tile.placed{min-width:62px;padding:9px 12px;font-size:19px;cursor:default;box-shadow:var(--clay-sm)}
.num-tile.dragging{opacity:.4}
.num-tile.mini{min-width:54px;padding:7px 10px;font-size:16px}
.hint-line{text-align:center;font-size:13.5px;font-weight:800;color:var(--muted);margin-bottom:12px}

/* ===== شاشة النتيجة ===== */
.result-hero{text-align:center;padding:clamp(20px,4vw,34px)}
.stars{display:flex;gap:10px;justify-content:center;margin:14px 0}
.stars .ic{width:clamp(38px,9vw,58px);height:clamp(38px,9vw,58px);color:#D8E2F5;fill:#EAF1FF;stroke-width:1.4}
.stars .ic.on{color:var(--amber);fill:var(--amber);animation:pop .5s cubic-bezier(.2,.9,.3,1.4) both}
.stars .ic.on:nth-child(2){animation-delay:.14s}
.stars .ic.on:nth-child(3){animation-delay:.28s}
.result-title{font-size:clamp(24px,5vw,36px);margin-top:8px}
.result-sub{color:var(--muted);font-weight:800;font-size:15px;margin-top:6px}
.stat-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(138px,1fr));margin:20px 0}
.stat{background:var(--surface-2);border:1px solid var(--border);border-radius:22px;padding:14px;text-align:center}
.stat b{display:block;font-family:var(--font-d);font-size:26px;color:var(--primary-d)}
.stat span{font-size:12.5px;font-weight:800;color:var(--muted)}
.mistakes{display:grid;gap:9px;margin-top:6px}
.mistake{display:flex;align-items:center;gap:12px;background:var(--surface-2);border:1px solid var(--border);border-radius:18px;padding:11px 14px;text-align:start}
.mistake .eq{font-family:var(--font-d);font-weight:800;font-size:17px;direction:ltr;white-space:nowrap;color:var(--primary-d)}
.mistake .why{font-size:12.5px;font-weight:700;color:var(--muted);line-height:1.6}
.result-actions{display:flex;gap:11px;flex-wrap:wrap;justify-content:center;margin-top:20px}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:60}

/* ===== النافذة المنبثقة (القاعدة) ===== */
.overlay{position:fixed;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(5px);z-index:80;display:grid;place-items:center;padding:16px;animation:fadeUp .2s ease both}
.modal{background:var(--surface);border-radius:30px;box-shadow:0 30px 70px rgba(15,23,42,.35);padding:clamp(18px,3.4vw,30px);max-width:620px;width:100%;max-height:88dvh;overflow:auto}
.modal-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.modal-head h3{font-size:clamp(19px,3.4vw,24px)}
.close-btn{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--border);transition:transform .16s ease}
.close-btn:hover{transform:rotate(90deg)}
.modal ol{padding-inline-start:22px;display:grid;gap:9px;font-size:14.5px;font-weight:700;line-height:1.8;color:#25405B}
.modal ol b{color:var(--primary-d)}
.example-grid{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(158px,1fr));margin-top:16px}
.example{background:var(--surface-2);border:1px solid var(--border);border-radius:20px;padding:13px;text-align:center}
.example .eq{font-family:var(--font-d);font-weight:800;font-size:19px;color:var(--primary-d);direction:ltr;margin-bottom:6px}
.example small{font-size:12px;font-weight:800;color:var(--muted);line-height:1.6;display:block}
.example.down{border-color:#BCD3FF}
.example.up{border-color:#FFC7E3}

/* ===== التنبيهات ===== */
.toast-wrap{position:fixed;bottom:20px;inset-inline-start:20px;z-index:90;display:flex;flex-direction:column;gap:9px;max-width:86vw}
.toast{display:flex;align-items:center;gap:9px;padding:12px 17px;border-radius:18px;background:var(--surface);box-shadow:0 16px 34px rgba(15,23,42,.2);border:2px solid var(--border);font-size:13.5px;font-weight:800;animation:fadeUp .3s ease both}
.toast .ic{width:19px;height:19px;color:var(--primary)}
.toast.gold{border-color:#FFE1A8;background:#FFFDF5}
.toast.gold .ic{color:var(--amber)}

/* ===== التذييل ===== */
.foot{position:relative;z-index:1;text-align:center;padding:6px 16px 28px;color:var(--muted)}
.foot p{font-size:12.5px;font-weight:800}
.foot-sub{font-size:11px;opacity:.8;margin-top:3px}
.sep-dot{display:inline-block;padding:0 6px;opacity:.5}

/* ===== استجابة الشاشات ===== */
@media (max-width:640px){
  .brand-text small{display:none}
  .icon-btn .lbl{display:none}
  .icon-btn{padding:11px}
  .hud{gap:8px}
  .chip{padding:7px 12px;font-size:12.5px}
  .platforms{grid-template-columns:repeat(2,1fr)}
  .platform{min-height:160px}
  .btn{padding:13px 22px}
}
@media (min-width:1100px){ .app{padding-top:34px} }
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.08s !important}
}
@media print{.topbar,.confetti,.toast-wrap{display:none}}