/* ═══════════════════════════════════════════════════════════
   MathKids v2 — Apple-aesthetic · Pastel · Premium Kids App
   Fonts: Fredoka (display) + Nunito (body)
   Emoji: Twemoji (Apple-style on all platforms)
═══════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&family=Nunito:wght@400;600;700;800;900&display=swap');

:root {
  --sky:   #e0f2fe; --sky-mid: #38bdf8;  --sky-deep: #0284c7;
  --mint:  #dcfce7; --mint-mid: #4ade80; --mint-deep: #16a34a;
  --peach: #ffedd5; --peach-mid:#fb923c; --peach-deep:#c2410c;
  --lilac: #f3e8ff; --lilac-mid:#c084fc; --lilac-deep:#7e22ce;
  --rose:  #ffe4e6; --rose-mid: #f87171; --rose-deep: #be123c;
  --lemon: #fef9c3; --lemon-mid:#facc15; --lemon-deep:#ca8a04;

  --bg: #fafbff;
  --bg2: #f0f4ff;
  --card: #ffffff;

  --ink: #1a1033;
  --ink2: #4b4b7a;
  --ink3: #9898c0;

  --correct: #22c55e;
  --wrong:   #ef4444;
  --gold:    #f59e0b;

  --border:  rgba(100,100,200,.1);
  --border2: rgba(100,100,200,.18);

  --sh-sm: 0 1px 4px rgba(100,100,200,.08),0 2px 12px rgba(100,100,200,.05);
  --sh-md: 0 4px 16px rgba(100,100,200,.13),0 2px 6px rgba(100,100,200,.06);
  --sh-lg: 0 8px 32px rgba(100,100,200,.16),0 2px 8px rgba(100,100,200,.08);

  --font:  'Nunito', sans-serif;
  --font-d:'Fredoka', sans-serif;

  --r:   16px;
  --r-sm:10px;
  --r-lg:22px;
  --r-xl:28px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;}
body{
  font-family:var(--font);
  background:var(--bg2);
  color:var(--ink);
  -webkit-tap-highlight-color:transparent;
  overscroll-behavior:none;
}

/* Twemoji */
img.emoji{height:1.15em;width:1.15em;margin:0 .05em 0 .1em;vertical-align:-.1em;display:inline-block;}

#app{
  max-width:430px;
  margin:0 auto;
  min-height:100vh;
  background:var(--bg);
  position:relative;
  overflow-x:hidden;
  background-image:radial-gradient(circle,rgba(124,58,237,.055) 1px,transparent 1px);
  background-size:26px 26px;
}

/* ── SCREENS ── */
.screen{display:none;min-height:100vh;padding:20px 18px 96px;flex-direction:column;}
.screen.active{display:flex;animation:screenIn .28s cubic-bezier(.22,1,.36,1);}
@keyframes screenIn{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}

/* ── TOPBAR ── */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:4px 0 16px;gap:8px;}
.wordmark{font-family:var(--font-d);font-size:24px;font-weight:700;background:linear-gradient(135deg,#7c3aed,#2563eb);-webkit-background-clip:text;-webkit-text-fill-color:transparent;}

/* ── PILLS ── */
.pill-row{display:flex;gap:6px;align-items:center;flex-wrap:wrap;}
.pill{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border-radius:30px;font-size:13px;font-weight:800;border:1.5px solid transparent;white-space:nowrap;}
.pill-coin{background:var(--lemon);border-color:rgba(234,179,8,.3);color:#92400e;}
.pill-fire{background:var(--peach);border-color:rgba(251,146,60,.3);color:#9a3412;}
.pill-xp{background:var(--lilac);border-color:rgba(192,132,252,.3);color:#581c87;}

/* ── HEADINGS ── */
.page-h{font-family:var(--font-d);font-size:30px;font-weight:700;color:var(--ink);line-height:1.1;letter-spacing:-.3px;}
.page-sub{font-size:14px;color:var(--ink2);margin-top:3px;font-weight:600;}
.section-label{font-size:11px;font-weight:800;letter-spacing:1.4px;text-transform:uppercase;color:var(--ink3);margin:18px 0 8px;}

/* ── CARD ── */
.card{background:var(--card);border:1.5px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-sm);padding:18px;transition:transform .18s,box-shadow .18s;}
.card:active{transform:scale(.98);}

/* ── XP BAR ── */
.xp-track{height:10px;background:var(--lilac);border-radius:20px;overflow:hidden;margin:2px 0 4px;}
.xp-fill{height:100%;background:linear-gradient(90deg,#7c3aed,#a855f7);border-radius:20px;transition:width .7s cubic-bezier(.34,1.56,.64,1);}
.xp-label{font-size:11px;color:var(--ink3);font-weight:700;text-align:right;}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:var(--r);font-family:var(--font);font-weight:800;font-size:16px;cursor:pointer;padding:15px 24px;transition:transform .15s,box-shadow .15s;width:100%;letter-spacing:-.2px;}
.btn:active{transform:scale(.96);}
.btn-primary{background:linear-gradient(135deg,#7c3aed,#4f46e5);color:white;box-shadow:0 4px 20px rgba(124,58,237,.35);}
.btn-primary:hover{box-shadow:0 6px 28px rgba(124,58,237,.45);transform:translateY(-2px);}
.btn-success{background:linear-gradient(135deg,#22c55e,#16a34a);color:white;box-shadow:0 4px 16px rgba(34,197,94,.35);}
.btn-outline{background:var(--card);border:2px solid var(--border2);color:var(--ink2);box-shadow:var(--sh-sm);}
.btn-ghost{background:var(--bg2);color:var(--ink2);border:1.5px solid var(--border);}
.btn-icon{width:40px;height:40px;padding:0;border-radius:50%;background:var(--card);border:1.5px solid var(--border);box-shadow:var(--sh-sm);font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;}

/* ── CLASS ROW ── */
.class-row{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none;}
.class-row::-webkit-scrollbar{display:none;}
.cls-chip{display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 14px;border-radius:var(--r);border:2px solid transparent;background:var(--card);box-shadow:var(--sh-sm);cursor:pointer;transition:all .18s;min-width:60px;flex-shrink:0;}
.cls-chip:active{transform:scale(.94);}
.cls-chip .cls-em{font-size:22px;line-height:1;}
.cls-chip .cls-lbl{font-size:10px;font-weight:800;color:var(--ink3);}
.cls-chip.active{border-color:currentColor;transform:scale(1.05);box-shadow:var(--sh-md);}
.cls-chip.active .cls-lbl{color:currentColor;}

/* ── TOPIC CARDS ── */
.topic-card{display:flex;align-items:center;gap:14px;background:var(--card);border:1.5px solid var(--border);border-radius:var(--r-lg);padding:14px 16px;box-shadow:var(--sh-sm);cursor:pointer;transition:all .18s;margin-bottom:10px;}
.topic-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.topic-card:active{transform:scale(.98);}
.t-icon-wrap{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.t-title{font-family:var(--font-d);font-size:15px;font-weight:600;color:var(--ink);line-height:1.2;}
.t-desc{font-size:12px;color:var(--ink3);margin-top:2px;font-weight:600;}
.t-bottom{display:flex;align-items:center;gap:6px;margin-top:5px;}
.xp-chip{font-size:11px;font-weight:800;color:#7c3aed;background:var(--lilac);border-radius:8px;padding:2px 8px;}
.star-row{display:flex;gap:2px;}
.s-dot{width:8px;height:8px;border-radius:50%;background:var(--lemon-mid);opacity:.2;}
.s-dot.on{opacity:1;}

/* ── HOME HERO ── */
.home-hero{background:linear-gradient(135deg,#7c3aed18,#2563eb10);border:1.5px solid rgba(124,58,237,.12);border-radius:var(--r-xl);padding:22px 20px;display:flex;align-items:center;gap:16px;margin-bottom:6px;}
.hero-av{font-size:54px;flex-shrink:0;line-height:1;}
.hero-grt{font-family:var(--font-d);font-size:22px;font-weight:700;color:var(--ink);}
.hero-sub{font-size:13px;color:var(--ink2);font-weight:600;margin-top:2px;}

/* ── GAME SCREEN ── */
#game{padding:14px 16px 24px;background:var(--bg);}
.game-hdr{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.gm-prog-track{flex:1;height:10px;background:var(--bg2);border-radius:20px;overflow:hidden;}
.gm-prog-fill{height:100%;background:linear-gradient(90deg,var(--mint-mid),var(--sky-mid));border-radius:20px;transition:width .4s ease;}
.q-tag{font-size:13px;font-weight:800;color:var(--ink3);background:var(--bg2);padding:4px 10px;border-radius:20px;}

/* Timer ring */
.timer-ring-wrap{display:flex;justify-content:center;margin:6px 0 10px;position:relative;}
.t-svg{transform:rotate(-90deg);}
.t-track{fill:none;stroke:var(--bg2);stroke-width:5;}
.t-arc{fill:none;stroke:var(--sky-mid);stroke-width:5;stroke-linecap:round;stroke-dasharray:157;stroke-dashoffset:0;transition:stroke-dashoffset .9s linear,stroke .4s;}
.t-arc.urgent{stroke:var(--rose-mid);animation:tPulse .5s infinite alternate;}
@keyframes tPulse{from{opacity:1;}to{opacity:.55;}}
.t-num{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-family:var(--font-d);font-size:22px;font-weight:700;color:var(--ink);}
.t-num.urgent{color:var(--wrong);}

/* Question bubble */
.q-bubble{background:linear-gradient(135deg,rgba(124,58,237,.06),rgba(37,99,235,.04));border:2px solid rgba(124,58,237,.11);border-radius:var(--r-xl);padding:28px 20px;text-align:center;margin-bottom:16px;min-height:108px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;}
.q-text{font-family:var(--font-d);font-size:30px;font-weight:600;color:var(--ink);line-height:1.35;}

/* Story bubble (story mode) */
.story-bubble{background:linear-gradient(135deg,var(--lemon),var(--peach));border:2px solid rgba(234,179,8,.25);border-radius:var(--r-xl);padding:20px;margin-bottom:14px;}
.story-char{font-size:44px;margin-bottom:8px;}
.story-text{font-family:var(--font-d);font-size:16px;font-weight:500;color:var(--ink);line-height:1.55;}

/* Options */
.opts-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:12px;}
.opt-btn{padding:18px 10px;background:var(--card);border:2px solid var(--border2);border-radius:var(--r-lg);font-family:var(--font);font-size:20px;font-weight:800;color:var(--ink);cursor:pointer;text-align:center;box-shadow:var(--sh-sm);transition:all .14s;}
.opt-btn:hover:not(:disabled){border-color:rgba(124,58,237,.3);background:var(--lilac);transform:scale(1.02);box-shadow:var(--sh-md);}
.opt-btn:active:not(:disabled){transform:scale(.97);}
.opt-btn.correct{background:var(--mint);border-color:var(--mint-mid);color:var(--mint-deep);animation:cPop .35s cubic-bezier(.34,1.56,.64,1);}
.opt-btn.wrong{background:var(--rose);border-color:var(--rose-mid);color:var(--rose-deep);animation:wShake .4s ease;}
@keyframes cPop{0%{transform:scale(1);}60%{transform:scale(1.07);}100%{transform:scale(1);}}
@keyframes wShake{0%,100%{transform:translateX(0);}20%{transform:translateX(-7px);}40%{transform:translateX(7px);}60%{transform:translateX(-4px);}80%{transform:translateX(4px);}}

.hint-pill{display:none;background:var(--lemon);border:1.5px solid rgba(234,179,8,.3);border-radius:var(--r);padding:10px 16px;font-size:13px;font-weight:700;color:#78350f;text-align:center;margin-bottom:12px;animation:screenIn .25s ease;}

/* Telugu toggle */
.lang-toggle{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:800;background:var(--peach);border-radius:20px;padding:5px 12px;color:var(--peach-deep);cursor:pointer;border:1.5px solid rgba(251,146,60,.3);}

/* ── DRAG AND DROP (Number Ninja) ── */
.ninja-source{display:flex;flex-wrap:wrap;gap:8px;padding:14px;background:var(--bg2);border:2px dashed var(--border2);border-radius:var(--r-lg);min-height:60px;margin-bottom:12px;align-content:flex-start;}
.ninja-target{display:flex;flex-wrap:wrap;gap:8px;padding:14px;background:var(--mint);border:2.5px dashed var(--mint-mid);border-radius:var(--r-lg);min-height:60px;align-content:flex-start;}
.ninja-target.drag-over{border-color:var(--mint-deep);background:var(--mint);}
.num-tile{font-family:var(--font-d);font-size:20px;font-weight:700;background:var(--card);border:2px solid var(--border2);border-radius:12px;padding:9px 15px;cursor:grab;user-select:none;transition:all .15s;box-shadow:var(--sh-sm);}
.num-tile:active{cursor:grabbing;transform:scale(1.1);box-shadow:var(--sh-md);}
.num-tile.dragging{opacity:.45;transform:scale(1.08);}

/* ── BOSS BATTLE ── */
.boss-wrap{text-align:center;padding:16px 0 8px;}
.boss-em{font-size:76px;animation:bossFloat 2s ease-in-out infinite;}
@keyframes bossFloat{0%,100%{transform:translateY(0);}50%{transform:translateY(-8px);}}
.boss-hp-track{height:14px;background:var(--rose);border-radius:20px;overflow:hidden;margin:10px 0;}
.boss-hp-fill{height:100%;background:linear-gradient(90deg,#ef4444,#dc2626);border-radius:20px;transition:width .5s ease;}
.boss-name{font-family:var(--font-d);font-size:20px;font-weight:700;color:var(--wrong);}

/* ── RESULT ── */
#result{align-items:center;justify-content:center;text-align:center;gap:14px;background:var(--bg);}
.result-mascot{font-size:90px;animation:bounceIn .55s cubic-bezier(.34,1.56,.64,1);}
@keyframes bounceIn{from{transform:scale(.2) rotate(-10deg);opacity:0;}to{transform:scale(1) rotate(0deg);opacity:1;}}
.result-grade{font-family:var(--font-d);font-size:22px;font-weight:700;color:var(--ink2);}
.result-big{font-family:var(--font-d);font-size:72px;font-weight:700;background:linear-gradient(135deg,var(--lemon-deep),var(--peach-mid));-webkit-background-clip:text;-webkit-text-fill-color:transparent;line-height:1;}
.result-stars{display:flex;gap:10px;justify-content:center;}
.res-star{font-size:36px;opacity:.2;}
.res-star.on{opacity:1;animation:starPop .4s cubic-bezier(.34,1.56,.64,1) forwards;}
@keyframes starPop{0%{transform:scale(0) rotate(-30deg);opacity:0;}70%{transform:scale(1.2) rotate(10deg);opacity:1;}100%{transform:scale(1) rotate(0deg);opacity:1;}}
.reward-chips{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;}
.reward-chip{background:var(--card);border:1.5px solid var(--border2);border-radius:var(--r);padding:10px 18px;font-weight:800;font-size:14px;box-shadow:var(--sh-sm);}

/* ── SETUP ── */
#setup{justify-content:flex-start;}
.avatar-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;}
.av-btn{aspect-ratio:1;background:var(--card);border:2.5px solid var(--border);border-radius:14px;cursor:pointer;font-size:28px;display:flex;align-items:center;justify-content:center;transition:all .18s;}
.av-btn:active{transform:scale(.9);}
.av-btn.selected{border-color:#7c3aed;background:var(--lilac);transform:scale(1.06);box-shadow:0 0 0 3px rgba(124,58,237,.2);}
.name-input{width:100%;background:var(--card);border:2px solid var(--border2);border-radius:var(--r);padding:15px 18px;font-family:var(--font-d);font-size:20px;font-weight:600;color:var(--ink);outline:none;text-align:center;box-shadow:var(--sh-sm);}
.name-input::placeholder{color:var(--ink3);}
.name-input:focus{border-color:rgba(124,58,237,.4);box-shadow:0 0 0 3px rgba(124,58,237,.1);}

/* ── PROFILE ── */
.profile-hero{background:linear-gradient(135deg,#7c3aed,#4f46e5);border-radius:var(--r-xl);padding:28px 20px;text-align:center;color:white;margin-bottom:6px;position:relative;overflow:hidden;}
.profile-hero::before{content:'';position:absolute;top:-30px;right:-30px;width:120px;height:120px;background:rgba(255,255,255,.1);border-radius:50%;}
.p-av{font-size:64px;margin-bottom:8px;position:relative;z-index:1;}
.p-nm{font-family:var(--font-d);font-size:24px;font-weight:700;position:relative;z-index:1;}
.p-lv{font-size:13px;opacity:.85;margin-top:2px;font-weight:600;position:relative;z-index:1;}
.stats-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;}
.stat-tile{background:var(--card);border:1.5px solid var(--border);border-radius:var(--r-lg);padding:14px 10px;text-align:center;box-shadow:var(--sh-sm);}
.s-num{font-family:var(--font-d);font-size:24px;font-weight:700;}
.s-lbl{font-size:11px;color:var(--ink3);margin-top:2px;font-weight:700;}

/* ── ACHIEVEMENTS ── */
.ach-card{display:flex;align-items:center;gap:12px;background:var(--card);border:1.5px solid var(--border);border-radius:var(--r);padding:12px 14px;box-shadow:var(--sh-sm);margin-bottom:8px;}
.ach-card.locked{opacity:.4;filter:grayscale(.6);}
.ach-ico{font-size:30px;width:44px;flex-shrink:0;text-align:center;}
.ach-title{font-family:var(--font-d);font-size:14px;font-weight:600;}
.ach-desc{font-size:12px;color:var(--ink3);font-weight:600;}
.ach-xp{margin-left:auto;font-size:11px;font-weight:800;color:#7c3aed;background:var(--lilac);border-radius:8px;padding:3px 9px;white-space:nowrap;}

/* ── PARENT DASHBOARD ── */
.parent-hero{background:linear-gradient(135deg,#1e1b4b,#312e81);border-radius:var(--r-xl);padding:20px;color:white;margin-bottom:10px;}
.parent-hero h3{font-family:var(--font-d);font-size:18px;font-weight:700;margin-bottom:12px;opacity:.9;}
.bar-chart{display:flex;align-items:flex-end;gap:8px;height:80px;margin-top:8px;}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;}
.bar-fill{width:100%;background:rgba(255,255,255,.3);border-radius:6px 6px 0 0;transition:height .6s cubic-bezier(.34,1.56,.64,1);min-height:4px;}
.bar-lbl{font-size:9px;opacity:.7;font-weight:700;}

/* ── TOAST ── */
.ach-toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(120px);background:white;border:1.5px solid var(--border2);border-radius:var(--r-lg);padding:14px 20px;display:flex;align-items:center;gap:12px;box-shadow:var(--sh-lg);z-index:900;min-width:280px;transition:transform .4s cubic-bezier(.34,1.56,.64,1);}
.ach-toast.show{transform:translateX(-50%) translateY(0);}
.t-ico{font-size:32px;}
.t-title{font-family:var(--font-d);font-size:15px;font-weight:700;color:var(--ink);}
.t-desc{font-size:12px;color:var(--ink3);font-weight:600;}
.t-badge{margin-left:auto;font-size:11px;font-weight:800;color:#7c3aed;background:var(--lilac);border-radius:8px;padding:3px 9px;white-space:nowrap;}

/* ── CONFETTI ── */
#confetti-layer{position:fixed;inset:0;pointer-events:none;z-index:700;overflow:hidden;}
@keyframes confFall{from{transform:translateY(-20px) rotate(0deg);opacity:1;}to{transform:translateY(110vh) rotate(720deg);opacity:0;}}

/* ── OVERLAY ── */
.overlay{position:fixed;inset:0;background:rgba(30,27,75,.7);backdrop-filter:blur(8px);z-index:800;display:none;align-items:center;justify-content:center;padding:24px;}
.overlay.show{display:flex;}
.modal-card{background:var(--card);border:1.5px solid var(--border);border-radius:var(--r-xl);padding:32px 24px;text-align:center;width:100%;max-width:340px;box-shadow:var(--sh-lg);animation:bounceIn .4s cubic-bezier(.34,1.56,.64,1);}

/* ── BOTTOM NAV ── */
.bnav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:430px;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-top:1.5px solid var(--border);display:flex;z-index:100;padding-bottom:env(safe-area-inset-bottom);}
.bnav-btn{flex:1;display:flex;flex-direction:column;align-items:center;padding:10px 0 8px;cursor:pointer;border:none;background:none;color:var(--ink3);font-family:var(--font);gap:2px;transition:color .15s;}
.bnav-btn .bi{font-size:22px;transition:transform .2s;}
.bnav-btn .bl{font-size:10px;font-weight:800;letter-spacing:.3px;}
.bnav-btn.active{color:#7c3aed;}
.bnav-btn.active .bi{transform:scale(1.15);}

/* float text */
@keyframes floatUp{0%{opacity:1;transform:translate(-50%,0) scale(1);}100%{opacity:0;transform:translate(-50%,-70px) scale(1.3);}}

::-webkit-scrollbar{width:4px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:4px;}

.mt6{margin-top:6px;}.mt10{margin-top:10px;}.mt14{margin-top:14px;}.mt20{margin-top:20px;}.mb10{margin-bottom:10px;}.center{text-align:center;}.row{display:flex;align-items:center;gap:8px;}.row-between{display:flex;align-items:center;justify-content:space-between;}

#installBtn {
  position: fixed;
  bottom: 90px; /* little above navbar */
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 20px;
  background: #6C63FF;
  color: white;
  border: none;
  border-radius: 10px;
  font-weight: bold;
  z-index: 9999; /* 🔥 VERY IMPORTANT */
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}