/* ===== Math Pro Gym — mobile-first PWA ===== */
:root{
  --brand:#6d28d9;--brand-2:#7c3aed;--brand-d:#4c1d95;
  --ink:#15121f;--muted:#7a7490;--line:#ece9f5;
  --bg:#f5f3fb;--card:#ffffff;
  --green:#16a34a;--green-s:#e6f7ee;--red:#dc2626;--red-s:#fdecec;
  --yellow:#ffce1f;--blue:#e7f0fd;--pink:#fde7ef;--peach:#fff1e6;--mint:#e6f6f4;--lilac:#f3ecfe;
  --r:18px;--r-lg:26px;--shadow:0 8px 24px rgba(76,29,149,.10);--shadow-lg:0 18px 44px rgba(76,29,149,.18);
  --font:'Plus Jakarta Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --safe-b:env(safe-area-inset-bottom,0px);--safe-t:env(safe-area-inset-top,0px);
  --app-w:520px;   /* app column width — widened per breakpoint below */
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%}
body{font-family:var(--font);background:var(--bg);color:var(--ink);overscroll-behavior:none;user-select:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
.hidden{display:none!important}
#app{max-width:var(--app-w);margin:0 auto;min-height:100%;display:flex;flex-direction:column;position:relative;background:var(--bg)}

/* appbar */
.appbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
  padding:calc(12px + var(--safe-t)) 18px 12px;background:rgba(245,243,251,.9);backdrop-filter:blur(10px)}
.brand{display:flex;align-items:center;gap:8px}
.brand-logo{height:30px;width:auto;display:block}
.brand-badge{font-weight:800;font-size:.62rem;letter-spacing:.12em;color:#fff;background:linear-gradient(135deg,var(--brand-2),var(--brand-d));padding:3px 7px;border-radius:6px}

/* splash */
#splash{position:fixed;inset:0;z-index:200;background:linear-gradient(160deg,#faf8ff,#f0eafc);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  transition:opacity .5s ease;}
#splash.hide{opacity:0;pointer-events:none}
.splash-logo{width:min(76%,360px);height:auto;animation:floaty 2.2s ease-in-out infinite}
.splash-tag{font-weight:800;letter-spacing:.5em;color:var(--brand);font-size:1rem;padding-left:.5em}
.splash-dots{display:flex;gap:8px}
.splash-dots i{width:9px;height:9px;border-radius:50%;background:var(--brand);opacity:.4;animation:blink 1s infinite}
.splash-dots i:nth-child(2){animation-delay:.2s}.splash-dots i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,100%{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1)}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.streak-pill{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-weight:800;font-size:.9rem;box-shadow:var(--shadow)}
.install{background:var(--brand);color:#fff;font-weight:700;border-radius:999px;padding:8px 14px;font-size:.85rem}
.appbar-right{display:flex;align-items:center;gap:8px}
.iconbtn{width:38px;height:38px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);font-size:1.05rem;display:grid;place-items:center}
.iconbtn:active{transform:scale(.92)}
/* duration chooser */
.dur-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;width:100%;margin-top:6px}
.dur{background:var(--card);border:2px solid var(--line);border-radius:18px;padding:18px 8px;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;gap:2px}
.dur b{font-size:2rem;color:var(--brand);line-height:1}
.dur span{font-size:.8rem;color:var(--muted)}
.dur small{margin-top:6px;font-size:.72rem;color:var(--brand);font-weight:700}
.dur:active{transform:scale(.96);border-color:var(--brand)}

/* screens */
#screens{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:6px 18px 110px}
.screen{display:none;animation:fade .25s ease}
.screen.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.screen-title{font-size:1.5rem;margin:10px 0 2px}
.screen-sub{color:var(--muted);margin:0 0 18px}
.grp{font-size:1.05rem;margin:26px 0 12px}

/* home */
.hello h1{font-size:1.7rem;margin:8px 0 2px}
.hello .sub{color:var(--muted);margin:0 0 18px}
.level-card{display:flex;align-items:center;gap:16px;background:var(--card);border-radius:var(--r);padding:16px 18px;box-shadow:var(--shadow);margin-bottom:16px}
.lvl{text-align:center;background:linear-gradient(160deg,var(--brand-2),var(--brand-d));color:#fff;border-radius:14px;padding:10px 14px;min-width:64px}
.lvl-num{display:block;font-size:1.6rem;font-weight:800;line-height:1}.lvl small{font-size:.7rem;opacity:.85}
.xpwrap{flex:1}.xprow{display:flex;justify-content:space-between;font-size:.85rem;margin-bottom:7px}
.xprow b{font-weight:700}.xprow span{color:var(--brand);font-weight:700}
.xpbar{height:10px;background:var(--lilac);border-radius:999px;overflow:hidden}
.xpbar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand-2),var(--yellow));border-radius:999px;transition:width .6s ease}

/* big CTA */
.big-cta{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:radial-gradient(140% 140% at 0% 0%,var(--brand-2),var(--brand-d));color:#fff;
  border-radius:var(--r-lg);padding:20px 22px;box-shadow:var(--shadow-lg);margin-bottom:18px}
.big-cta.alt{background:radial-gradient(140% 140% at 100% 0%,#f59e0b,#b45309)}
.big-cta.challenge{background:linear-gradient(120deg,#fb7185,#e11d48 45%,#7c3aed)}
.big-cta .lbl{display:block;font-size:1.25rem;font-weight:800}
.big-cta small{opacity:.9}
.big-cta .go{width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.2);display:grid;place-items:center;font-size:1.1rem}
.big-cta:active{transform:scale(.98)}

/* dash grid */
.dash-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:8px}
.mode-card{display:flex;flex-direction:column;align-items:flex-start;gap:2px;border-radius:var(--r-lg);padding:20px 18px;color:#fff;min-height:140px;justify-content:flex-end;box-shadow:var(--shadow);text-align:left}
.mode-card .emoji{font-size:2.2rem;margin-bottom:auto}
.mode-card .t{font-size:1.15rem;font-weight:800}.mode-card small{opacity:.92;font-size:.8rem}
.grad-purple{background:linear-gradient(160deg,#7c3aed,#4c1d95)}
.grad-pink{background:linear-gradient(160deg,#ec4899,#9d174d)}
.mode-card:active{transform:scale(.98)}

/* quick stats */
.quickstats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
.qs{background:var(--card);border-radius:14px;padding:14px 10px;text-align:center;box-shadow:var(--shadow)}
.qs b{display:block;font-size:1.3rem;color:var(--brand)}.qs span{font-size:.72rem;color:var(--muted)}

/* op grid (gym) */
.op-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.op{display:flex;align-items:center;gap:12px;background:var(--card);border-radius:var(--r);padding:16px;box-shadow:var(--shadow);text-align:left}
.op .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.5rem;font-weight:800;color:#fff;background:var(--brand)}
.op b{display:block;font-size:1rem}.op small{color:var(--muted);font-size:.78rem}
.op:active{transform:scale(.97)}

/* puzzles list */
.puzzle-list{display:grid;gap:14px}
.pz{display:flex;align-items:center;gap:14px;background:var(--card);border-radius:var(--r);padding:16px 18px;box-shadow:var(--shadow);text-align:left}
.pz .pic{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;font-size:1.7rem}
.pz b{display:block;font-size:1.08rem}.pz small{color:var(--muted)}
.pz .best{margin-left:auto;text-align:right;font-size:.75rem;color:var(--brand);font-weight:700}
.pz:active{transform:scale(.98)}

/* stat cards */
.stat-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:8px}
.sc{background:var(--card);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
.sc b{display:block;font-size:1.7rem;color:var(--brand)}.sc span{color:var(--muted);font-size:.82rem}
.best-list .brow{display:flex;justify-content:space-between;background:var(--card);border-radius:12px;padding:13px 16px;margin-bottom:8px;box-shadow:var(--shadow);font-weight:600}
.best-list .brow span{color:var(--brand);font-weight:800}
.ghost-btn{width:100%;margin-top:18px;padding:14px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--red);font-weight:700}

/* tabbar */
.tabbar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:var(--app-w);z-index:40;
  display:flex;justify-content:space-around;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);padding:8px 6px calc(8px + var(--safe-b))}
.tab{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;font-size:.7rem;color:var(--muted);font-weight:600;padding:4px}
.tab span{font-size:1.35rem;filter:grayscale(.4);opacity:.7}
.tab.active{color:var(--brand)}.tab.active span{filter:none;opacity:1;transform:translateY(-1px)}

/* ===== game overlay ===== */
.overlay{position:fixed;inset:0;z-index:60;background:var(--bg);display:none;justify-content:center}
.overlay.show{display:flex}
.game{width:100%;max-width:var(--app-w);display:flex;flex-direction:column;height:100%;padding:calc(14px + var(--safe-t)) 18px calc(18px + var(--safe-b))}
.ghead{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.gclose{font-size:1.6rem;width:40px;height:40px;border-radius:50%;background:#fff;box-shadow:var(--shadow)}
.gtitle{font-weight:800}
.gtop{display:flex;gap:10px;margin:10px 0 6px}
.gtop .box{flex:1;background:var(--card);border-radius:14px;padding:10px;text-align:center;box-shadow:var(--shadow)}
.gtop .box b{display:block;font-size:1.3rem}.gtop .box span{font-size:.7rem;color:var(--muted)}
.timerbar{height:8px;background:var(--lilac);border-radius:999px;overflow:hidden;margin:6px 0 4px}
.timerbar i{display:block;height:100%;width:100%;background:linear-gradient(90deg,var(--brand-2),var(--yellow));border-radius:999px;transition:width .15s linear}
.qcard{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;text-align:center}
.qbig{font-size:clamp(2.4rem,11vw,3.6rem);font-weight:800;letter-spacing:.5px}
.qhint{color:var(--muted);font-size:.95rem;min-height:1.2em}
.qseq{font-size:clamp(1.6rem,7vw,2.4rem);font-weight:800;letter-spacing:2px}
.qword{font-size:clamp(1.15rem,5vw,1.5rem);font-weight:700;line-height:1.35;max-width:92%;margin:0 auto}
.qsub{font-size:1rem;color:var(--muted);font-weight:600}.qsub b{color:var(--brand)}
.msq{display:grid;grid-template-columns:repeat(3,64px);gap:8px;justify-content:center;margin:16px 0}
.mcell{width:64px;height:64px;border-radius:14px;display:grid;place-items:center;font-size:1.5rem;font-weight:800;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow)}
.mcell.miss{background:var(--brand-soft);border:2px dashed var(--brand);color:var(--brand)}
/* colourful magic-square cells (corners green · top/bottom-mid cyan · sides amber · centre pink) */
.msq .mcell:not(.miss):nth-child(1),.msq .mcell:not(.miss):nth-child(3),
.msq .mcell:not(.miss):nth-child(7),.msq .mcell:not(.miss):nth-child(9){background:#dcfce7;border-color:#86efac;color:#166534}
.msq .mcell:not(.miss):nth-child(2),.msq .mcell:not(.miss):nth-child(8){background:#cffafe;border-color:#67e8f9;color:#155e75}
.msq .mcell:not(.miss):nth-child(4),.msq .mcell:not(.miss):nth-child(6){background:#fef9c3;border-color:#fde047;color:#854d0e}
.msq .mcell:not(.miss):nth-child(5){background:#fce7f3;border-color:#f9a8d4;color:#9d174f}
.choices{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:6px;width:100%;max-width:484px;margin-left:auto;margin-right:auto}
.choices.three{grid-template-columns:1fr 1fr}
.choice{background:var(--card);border:2px solid var(--line);border-radius:16px;padding:20px;font-size:1.5rem;font-weight:800;box-shadow:var(--shadow);transition:.12s}
.choice:active{transform:scale(.96)}
.choice.right{background:var(--green-s);border-color:var(--green);color:var(--green)}
.choice.wrong{background:var(--red-s);border-color:var(--red);color:var(--red)}
/* keypad */
.answer-disp{font-size:2.4rem;font-weight:800;min-height:1.4em;letter-spacing:2px}
.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:8px;width:100%;max-width:484px;margin-left:auto;margin-right:auto}
.key{background:var(--card);border-radius:16px;padding:18px;font-size:1.5rem;font-weight:800;box-shadow:var(--shadow)}
.key:active{transform:scale(.95);background:var(--lilac)}
.key.wide{grid-column:span 1}
.key.ok{background:var(--brand);color:#fff}
.key.del{background:#fff;color:var(--red)}
.feedback{position:fixed;top:38%;left:50%;transform:translate(-50%,-50%) scale(.6);font-size:4rem;opacity:0;pointer-events:none;transition:.2s;z-index:70}
.feedback.show{opacity:1;transform:translate(-50%,-50%) scale(1)}

/* result screen */
.result{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:8px}
.result .big{font-size:4rem}
.result h2{font-size:1.8rem;margin:0}
.result .score{font-size:3rem;font-weight:800;color:var(--brand)}
.result .rgrid{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%;margin:14px 0}
.result .rg{background:var(--card);border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.result .rg b{display:block;font-size:1.4rem}.result .rg span{font-size:.75rem;color:var(--muted)}
.xpgain{background:var(--lilac);color:var(--brand);font-weight:800;border-radius:999px;padding:8px 18px}
/* per-test report card on results */
.report-card{width:100%;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 16px;margin:8px 0 4px;box-shadow:var(--shadow);text-align:left}
.report-h{font-weight:800;color:var(--brand);margin-bottom:8px}
.report-sec{margin:6px 0 10px} .report-sec>b{display:block;font-size:.85rem;color:var(--muted);margin-bottom:4px}
.report-row{display:flex;justify-content:space-between;align-items:center;padding:3px 0;font-size:.95rem}
.report-row span{color:var(--muted)}
.report-mail{margin-top:6px;font-size:.82rem;color:var(--muted);background:var(--lilac);border-radius:10px;padding:8px 10px}
/* comparison block on results */
.compare{width:100%;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 16px;margin:6px 0 4px;box-shadow:var(--shadow)}
.cmp-row{display:flex;align-items:center;gap:8px;font-size:.95rem;font-weight:600;margin:3px 0}
.cmp-row small{color:var(--muted);font-weight:500}
.cmp-row .muted{color:var(--muted)}
.delta{font-weight:800;padding:2px 9px;border-radius:999px;font-size:.85rem}
.delta.up{background:var(--green-s);color:var(--green)}
.delta.down{background:var(--red-s);color:var(--red)}
.delta.same{background:var(--lilac);color:var(--brand)}
.delta.new{background:var(--blue);color:#0369a1}
.spark{display:flex;align-items:flex-end;gap:5px;height:46px;margin:10px 0 2px}
.spark i{flex:1;background:var(--lilac);border-radius:5px 5px 2px 2px;min-height:8px;transition:height .4s ease}
.spark i.cur{background:linear-gradient(180deg,var(--brand-2),var(--brand))}
.cmp-cap{font-size:.7rem;color:var(--muted);text-align:right}
/* history list */
.hist-list{display:grid;gap:8px}
.hrow{display:flex;justify-content:space-between;align-items:center;background:var(--card);border-radius:12px;padding:12px 16px;box-shadow:var(--shadow)}
.hrow.muted{color:var(--muted);font-size:.9rem;justify-content:flex-start}
.hmeta b{display:block;font-size:.98rem}.hmeta small{color:var(--muted);font-size:.76rem}
.hscore{display:flex;align-items:center;gap:10px}.hscore>b{font-size:1.2rem;color:var(--brand)}
.result-actions{display:flex;gap:10px;width:100%;margin-top:8px}
.btn{flex:1;padding:16px;border-radius:16px;font-weight:800;font-size:1rem}
.btn.primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-lg)}
.btn.ghost{background:#fff;border:1px solid var(--line)}
.btn:active{transform:scale(.97)}

/* sequence / operator puzzle helpers */
.op-pick{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:10px;width:100%;max-width:484px;margin-left:auto;margin-right:auto}
.eqline{font-size:clamp(1.6rem,8vw,2.6rem);font-weight:800}
.blank{display:inline-grid;place-items:center;min-width:44px;height:44px;border-bottom:3px solid var(--brand);color:var(--brand)}
.toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-weight:600;font-size:.85rem;opacity:0;transition:.2s;z-index:80}
.toast.show{opacity:1}
@keyframes pop{0%{transform:scale(1)}50%{transform:scale(1.08)}100%{transform:scale(1)}}
.pop{animation:pop .3s ease}

/* ===== auth gate ===== */
.authgate{position:fixed;inset:0;z-index:150;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(1000px 500px at 50% -10%,rgba(124,58,237,.25),transparent),var(--bg);
  padding:calc(20px + var(--safe-t)) 18px calc(20px + var(--safe-b));overflow:auto}
.auth-card{width:100%;max-width:380px;background:var(--card);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);
  padding:28px 24px;text-align:center}
.auth-logo{height:42px;width:auto;margin:0 auto 8px}
.auth-badge{display:inline-block;font-weight:800;font-size:.66rem;letter-spacing:.14em;color:#fff;
  background:linear-gradient(135deg,var(--brand-2),var(--brand-d));padding:4px 10px;border-radius:7px;margin-bottom:18px}
.auth-h{font-size:1.5rem;margin:0 0 4px}
.auth-sub{color:var(--muted);font-size:.92rem;margin:0 0 18px}
.auth-form{display:flex;flex-direction:column;gap:12px}
.auth-input{width:100%;padding:14px 16px;border:2px solid var(--line);border-radius:14px;font-size:1rem;font-family:inherit;background:var(--bg-soft);transition:.15s}
.auth-input:focus{outline:none;border-color:var(--brand);background:#fff}
.auth-btn{width:100%;padding:15px;border-radius:14px;background:var(--brand);color:#fff;font-weight:800;font-size:1.05rem;box-shadow:var(--shadow);transition:.15s}
.auth-btn:active{transform:scale(.98)} .auth-btn:disabled{opacity:.6}
.auth-switch{margin-top:16px;font-size:.92rem;color:var(--muted)}
.auth-switch a{color:var(--brand);font-weight:700}
.auth-msg{padding:11px 14px;border-radius:12px;font-size:.9rem;font-weight:600;margin-bottom:14px;text-align:left}
.auth-msg.ok{background:var(--green-s);color:var(--green)}
.auth-msg.err{background:var(--red-s);color:var(--red)}
.auth-msg.warn{background:var(--peach);color:#b45309}

/* ===== admin user list ===== */
#adminList .urow{display:flex;justify-content:space-between;align-items:center;gap:10px;background:var(--card);
  border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin-bottom:10px}
#adminList .uinfo b{display:block;font-size:1rem} #adminList .uinfo small{color:var(--muted);font-size:.8rem}
#adminList .uact{display:flex;align-items:center;gap:7px;flex-wrap:wrap;justify-content:flex-end}
.ubadge{font-size:.7rem;font-weight:800;padding:3px 9px;border-radius:999px;text-transform:capitalize}
.ubadge.pending{background:var(--peach);color:#b45309}
.ubadge.approved{background:var(--green-s);color:var(--green)}
.ubadge.rejected{background:var(--red-s);color:var(--red)}
.ubadge.blocked{background:#374151;color:#fff}
.ubadge.admin{background:var(--lilac);color:var(--brand)}
.ua{font-weight:700;font-size:.82rem;padding:8px 12px;border-radius:10px;border:0}
.ua.approve{background:var(--green);color:#fff} .ua.reject{background:#fff;border:1px solid var(--red);color:var(--red)}
.ua.block{background:#374151;color:#fff}
.ua.remove{background:var(--red);color:#fff}
.ua:active{transform:scale(.95)} .ua:disabled{opacity:.5}
#adminList .muted{color:var(--muted);font-size:.9rem;padding:4px 2px}
#adminList .uinfo small{display:block}
.ua.report{background:var(--lilac);color:var(--brand)}
#adminList .ucard{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:4px 4px 0;margin-bottom:10px}
#adminList .ucard .urow{border:0;box-shadow:none;margin:0}
.ucomment{display:flex;gap:8px;padding:0 12px 12px}
.cnote{flex:1;padding:9px 12px;border:1px solid var(--line);border-radius:10px;font-size:.85rem;font-family:inherit;background:var(--bg-soft)}
.cnote:focus{outline:none;border-color:var(--brand);background:#fff}

/* ===== dashboard extras ===== */
.goal-card{display:flex;align-items:center;gap:16px;background:var(--card);border-radius:var(--r);padding:16px 18px;box-shadow:var(--shadow);margin-top:18px}
.ring{width:84px;height:84px;border-radius:50%;background:conic-gradient(var(--brand) 0deg,var(--lilac) 0);display:grid;place-items:center;flex:none}
.ring-in{width:64px;height:64px;border-radius:50%;background:var(--card);display:grid;place-items:center;text-align:center}
.ring-in b{font-size:1.05rem;color:var(--brand);line-height:1} .ring-in span{font-size:.62rem;color:var(--muted)}
.goal-meta h3{margin:0 0 4px;font-size:1.1rem} .goal-meta p{margin:0;font-size:.9rem}
.ach-strip{display:flex;gap:10px;overflow-x:auto;padding:2px 2px 6px}
.ach{flex:none;width:84px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 6px;text-align:center;opacity:.45;filter:grayscale(1)}
.ach.got{opacity:1;filter:none;border-color:var(--brand);box-shadow:var(--shadow)}
.ach span{font-size:1.6rem;display:block} .ach small{font-size:.66rem;font-weight:700;display:block;margin-top:4px;line-height:1.1}
.trend{display:flex;align-items:flex-end;gap:6px;height:90px;background:var(--card);border-radius:var(--r);padding:14px;box-shadow:var(--shadow)}
.trend i{flex:1;background:linear-gradient(180deg,var(--brand-2),var(--brand));border-radius:6px 6px 3px 3px;min-height:8px;transition:height .4s}

/* keep the crowded top bar fitting on small phones */
@media(max-width:480px){
  .appbar{padding-left:10px;padding-right:10px;gap:6px}
  .appbar-right{gap:5px}
  .iconbtn{width:32px;height:32px;font-size:.95rem}
  .brand-logo{height:24px}
  .brand-badge{display:none}
  .coin-pill,.streak-pill{padding:5px 8px;font-size:.74rem}
}

/* ===== coins ===== */
.coin-pill{background:#fff7da;border:1px solid #f3e3a0;border-radius:999px;padding:6px 12px;font-weight:800;font-size:.9rem;box-shadow:var(--shadow);color:#a87900}

/* ===== daily quests ===== */
.quests{display:grid;gap:10px}
.quest{display:flex;gap:12px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 14px;box-shadow:var(--shadow)}
.quest.done{border-color:var(--green);background:var(--green-s)}
.q-ic{font-size:1.5rem;flex:none} .q-body{flex:1}
.q-top{display:flex;justify-content:space-between;align-items:center}
.q-top b{font-size:.98rem} .q-rew{font-size:.72rem;font-weight:800;color:var(--brand);background:var(--lilac);padding:2px 8px;border-radius:999px}
.q-body small{color:var(--muted);font-size:.8rem}
.q-bar{height:7px;background:var(--lilac);border-radius:999px;margin-top:7px;overflow:hidden}
.q-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--brand-2),var(--brand));border-radius:999px;transition:width .5s}
.quest.done .q-bar i{background:var(--green)}

/* ===== leaderboard ===== */
#lbList{display:grid;gap:9px}
.lb-row{display:flex;align-items:center;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:13px 16px;box-shadow:var(--shadow)}
.lb-row.me{border-color:var(--brand);background:var(--brand-soft)}
.lb-rank{font-size:1.2rem;font-weight:800;min-width:34px;text-align:center}
.lb-name{flex:1} .lb-name b{display:block} .lb-name small{color:var(--muted);font-size:.76rem}
.lb-score{text-align:right;font-weight:800;color:var(--brand)} .lb-score small{display:block;font-weight:500;color:var(--muted);font-size:.66rem}

/* ===== level-up modal ===== */
.levelup{background:var(--card);border-radius:var(--r-lg);padding:36px 30px;box-shadow:var(--shadow-lg);max-width:320px}
.lu-emoji{font-size:3.4rem} .levelup h2{margin:6px 0}
.lu-lvl{font-size:3.6rem;font-weight:800;color:var(--brand);line-height:1}
.lu-rank{color:var(--muted);font-weight:700;margin:2px 0 20px}

/* ===== avatars ===== */
.avatar-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.av{background:var(--card);border:2px solid var(--line);border-radius:16px;padding:12px 4px;display:flex;flex-direction:column;align-items:center;gap:2px;box-shadow:var(--shadow)}
.av .av-e{font-size:2rem} .av small{font-size:.62rem;color:var(--muted);font-weight:700}
.av.sel{border-color:var(--brand);background:var(--brand-soft)}
.av.locked{opacity:.55;filter:grayscale(.6)}
.av:not(.locked):active{transform:scale(.94)}

/* ===== confetti ===== */
.confetti{position:fixed;top:-12px;width:10px;height:14px;z-index:300;border-radius:2px;pointer-events:none;
  animation:fall 2.2s linear forwards;transform:rotate(var(--rot,0deg))}
@keyframes fall{to{top:104vh;transform:rotate(calc(var(--rot,0deg) + 720deg))}}

/* ===== student report (printable) ===== */
#reportOverlay{z-index:90}
.report{padding:6px 4px 20px}
.rep-head{display:flex;align-items:center;gap:12px;border-bottom:2px solid var(--line);padding-bottom:12px;margin-bottom:14px}
.rep-logo{height:34px} .rep-head b{font-size:1.05rem}
.rep-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:8px}
.rep-grid .rg{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center}
.rep-grid .rg b{display:block;font-size:1.4rem;color:var(--brand)} .rep-grid .rg span{font-size:.7rem;color:var(--muted)}
.rep-h{margin:18px 0 8px} .rep-ach{display:flex;flex-wrap:wrap;gap:6px}
.rep-ach .ach{width:auto;flex:none;display:inline-block;padding:6px 10px;font-size:.78rem;font-weight:700;border-radius:999px}
.rep-table{width:100%;border-collapse:collapse;font-size:.82rem}
.rep-table th,.rep-table td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--line)}
.rep-table th{color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.05em}
.rep-foot{margin-top:14px;color:var(--muted);font-size:.82rem}
/* comparison badges + detailed report sections */
.delta{display:inline-flex;align-items:center;gap:2px;font-size:.78rem;font-weight:800;padding:1px 7px;border-radius:999px;white-space:nowrap}
.delta.up{color:#16a34a;background:#16a34a18} .delta.down{color:#dc2626;background:#dc262618}
.delta.flat{color:var(--muted);background:var(--line)} .delta.best{color:#b45309;background:#f59e0b22}
.rep-latest{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.rl-top{display:flex;justify-content:space-between;align-items:baseline} .rl-top b{font-size:1rem}
.rl-stat{font-weight:800;color:var(--brand);font-size:1.15rem;margin:4px 0}
.rl-cmp{font-size:.85rem;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.rep-traj{display:flex;flex-direction:column;gap:8px}
.tj{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.tj span{color:var(--muted);font-size:.82rem;flex:1} .tj b{font-weight:800}
.rep-chart{display:flex;align-items:flex-end;gap:6px;height:120px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 12px 6px}
.tb{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:4px}
.tb-bar{width:100%;max-width:26px;background:linear-gradient(180deg,var(--brand),#a78bfa);border-radius:6px 6px 3px 3px;min-height:4px}
.tb small{font-size:.62rem;color:var(--muted)}
.report-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding-top:10px;border-top:1px solid var(--line)}
.rep-msg{font-size:.82rem;color:var(--green);font-weight:600;flex-basis:100%}
/* ===== responsive: tablets (≥768px) ===== */
@media(min-width:768px){
  :root{--app-w:680px}
  #app{border-left:1px solid var(--line);border-right:1px solid var(--line)}
  #screens{padding-left:26px;padding-right:26px}
  .appbar{padding-left:26px;padding-right:26px}
  .game{padding-left:26px;padding-right:26px}
  .puzzle-list{grid-template-columns:1fr 1fr}
  .pz .best{text-align:right}
  .avatar-grid{grid-template-columns:repeat(6,1fr)}
  .msq{grid-template-columns:repeat(3,76px)}
  .mcell{width:76px;height:76px;font-size:1.7rem}
  .auth-card{max-width:430px;padding:34px 32px}
  .rep-chart{height:150px}
  .levelup{max-width:380px}
}

/* ===== responsive: landscape tablets & desktops (≥1024px) ===== */
@media(min-width:1024px){
  :root{--app-w:840px}
  body{background:linear-gradient(160deg,#efeaf9,#f5f3fb 40%,#efeaf9)}
  #app{box-shadow:0 0 60px rgba(76,29,149,.08)}
  .stat-cards{grid-template-columns:repeat(4,1fr)}
  .quickstats{gap:14px}
  .rep-grid{grid-template-columns:repeat(6,1fr)}
  .qbig{font-size:3.8rem}
}

/* ===== desktop / mouse: hover feedback ===== */
@media(hover:hover) and (pointer:fine){
  .op:hover,.pz:hover,.mode-card:hover,.big-cta:hover,.dur:hover,.av:not(.locked):hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);transition:.15s}
  .choice:hover{border-color:var(--brand);background:var(--lilac)}
  .key:hover{background:var(--lilac)} .key.ok:hover{background:var(--brand-d)} .key.del:hover{background:var(--red-s)}
  .btn:hover,.auth-btn:hover,.ua:hover,.iconbtn:hover{filter:brightness(.96)}
  .tab:hover{color:var(--brand)}
  body{user-select:auto}
}

/* ===== landscape tablets: question left · keypad right ===== */
@media(min-width:900px) and (orientation:landscape){
  .game:has(> .keypad){
    display:grid;grid-template-columns:1.15fr 1fr;column-gap:30px;
    grid-template-areas:"head head" "timer timer" "top top" "q disp" "q pad" "q .";
    grid-template-rows:auto auto auto auto auto 1fr;
  }
  .game:has(> .keypad) .ghead{grid-area:head}
  .game:has(> .keypad) .timerbar{grid-area:timer}
  .game:has(> .keypad) .gtop{grid-area:top}
  .game:has(> .keypad) .qcard{grid-area:q}
  .game:has(> .keypad) .answer-disp{grid-area:disp;align-self:end;text-align:center}
  .game:has(> .keypad) .keypad{grid-area:pad;align-self:start;margin-top:4px}
}

/* ===== short / landscape phone screens ===== */
@media(max-height:560px){
  .gtop .box{padding:6px} .gtop .box b{font-size:1.05rem}
  .qbig{font-size:clamp(1.7rem,7vw,2.4rem)}
  .answer-disp{font-size:1.7rem;min-height:1.2em}
  .key{padding:10px;font-size:1.2rem}
  .choice{padding:12px;font-size:1.2rem}
  .msq{grid-template-columns:repeat(3,48px);gap:6px;margin:8px 0}
  .mcell{width:48px;height:48px;font-size:1.15rem}
}

@media print{
  body *{visibility:hidden}
  #reportOverlay,#reportOverlay *{visibility:visible}
  #reportOverlay{position:absolute;inset:0;display:block!important;background:#fff}
  .no-print{display:none!important}
}