/* Sahasra Apps – Kids engine styles. Shared by every kids app. */
:root{
  --bg:#F4F6FD;--surface:#FFFFFF;--surface2:#EEF1FB;--ink:#141A3A;--muted:#525A80;--line:#DCE1F2;
  --navy:#0B1446;--gold:#F7A51C;--gold-ink:#0B1446;--ok:#0E8A55;--ok-soft:#DDF5E9;--bad:#C93B3B;--bad-soft:#FBE3E3;
  --app:#1F5FD1;--app-soft:#E3ECFC;--app-ink:#FFFFFF;
  --r:20px;--shadow:0 1px 2px rgba(11,20,70,.06),0 8px 24px rgba(11,20,70,.08);
  --font:"Nunito",system-ui,-apple-system,"Segoe UI",sans-serif;--display:"Fredoka","Nunito",system-ui,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0A1030;--surface:#131B45;--surface2:#1A2357;--ink:#EEF0FF;--muted:#AEB4D6;--line:#28316B;
  --ok:#5FD7A0;--ok-soft:#123A2C;--bad:#FF8A8A;--bad-soft:#4A1E26;--app-soft:#1B2A5E;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35)}}
:root[data-theme="dark"]{--bg:#0A1030;--surface:#131B45;--surface2:#1A2357;--ink:#EEF0FF;--muted:#AEB4D6;--line:#28316B;
  --ok:#5FD7A0;--ok-soft:#123A2C;--bad:#FF8A8A;--bad-soft:#4A1E26;--app-soft:#1B2A5E;--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35)}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:500 17px/1.5 var(--font);min-height:100vh;-webkit-tap-highlight-color:transparent}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--app);outline-offset:3px;border-radius:8px}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
img,svg{max-width:100%}

/* top bar */
.k-top{position:sticky;top:0;z-index:20;background:var(--navy);color:#fff;box-shadow:0 2px 12px rgba(0,0,0,.15)}
.k-top .in{max-width:1040px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:10px}
.k-top a.home{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none;font:600 15px/1 var(--display);opacity:.9}
.k-top a.home img{width:30px;height:30px;border-radius:8px}
.k-top .title{font:600 19px/1.1 var(--display);display:flex;align-items:center;gap:8px;min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.k-top .sp{flex:1}
.k-top .chip{display:flex;align-items:center;gap:5px;background:rgba(255,255,255,.12);border-radius:999px;padding:5px 11px;font:700 15px/1 var(--display);white-space:nowrap}
.k-top .chip.gold{background:var(--gold);color:var(--gold-ink)}
.k-top button.ic{background:rgba(255,255,255,.12);border:0;color:#fff;width:36px;height:36px;border-radius:12px;font-size:18px;display:grid;place-items:center;flex:none}
.k-top button.ic:hover{background:rgba(255,255,255,.22)}
@media (max-width:560px){.k-top .in{gap:7px;padding:9px 12px}.k-top a.home span,.k-top .title span[aria-hidden]{display:none}.k-top .title{font-size:16px}.k-top .chip{padding:5px 8px;font-size:14px}.k-top .chip.xp{display:none}.k-top button.ic{width:34px;height:34px}}
@media (max-width:380px){.k-top .chip:not(.gold){display:none}}

/* layout */
main.k-main{max-width:1040px;margin:0 auto;padding:18px 16px 60px}
.screen{display:none;animation:kin .25s ease}
.screen.on{display:block}
@keyframes kin{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
h1.k-h,h2.k-h{font:600 clamp(26px,5vw,36px)/1.15 var(--display);margin:4px 0 6px}
h2.k-h{font-size:clamp(22px,4vw,28px)}
h3{font:600 20px/1.2 var(--display);margin:0 0 6px}
.k-sub{color:var(--muted);margin:0 0 18px}
.k-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.k-center{text-align:center}
.k-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,var(--min,220px)),1fr));gap:14px}
.k-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
button.k-tile{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow);text-align:left;display:grid;gap:6px;align-content:start;transition:transform .12s ease,border-color .12s}
button.k-tile:hover{transform:translateY(-2px);border-color:var(--app)}
button.k-tile:disabled{opacity:.55;cursor:not-allowed;transform:none}
.k-tile .big{font-size:38px;line-height:1}
.k-tile b{font:600 19px/1.2 var(--display)}
.k-tile small{color:var(--muted);font-size:14px}

/* buttons */
.k-btn{border:0;border-radius:16px;padding:13px 22px;font:600 18px/1 var(--display);background:var(--app);color:var(--app-ink);box-shadow:0 4px 0 rgba(0,0,0,.18);transition:transform .08s}
.k-btn:active{transform:translateY(3px);box-shadow:0 1px 0 rgba(0,0,0,.18)}
.k-btn.alt{background:var(--surface2);color:var(--ink);box-shadow:0 4px 0 var(--line)}
.k-btn.gold{background:var(--gold);color:var(--gold-ink)}
.k-btn.sm{padding:9px 14px;font-size:15px;border-radius:12px}
.k-btn:disabled{opacity:.5;cursor:not-allowed}

/* choices */
.k-choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px 0}
.k-choices.one{grid-template-columns:1fr}
.k-choice{background:var(--surface);border:2px solid var(--line);border-radius:18px;padding:16px;font:600 22px/1.2 var(--display);min-height:64px;transition:transform .08s,border-color .1s,background .1s;text-align:center}
.k-choices.one .k-choice{font:600 18px/1.3 var(--font);text-align:left}
.k-choice:hover{border-color:var(--app)}
.k-choice.ok{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}
.k-choice.bad{background:var(--bad-soft);border-color:var(--bad);color:var(--bad);animation:shake .3s}
.k-choice:disabled{cursor:default}
@keyframes shake{25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}

/* question area */
.k-q{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:22px 18px;box-shadow:var(--shadow);max-width:640px;margin:0 auto}
.k-qtext{font:600 clamp(30px,8vw,52px)/1.1 var(--display);text-align:center;margin:8px 0}
.k-progress{height:10px;background:var(--surface2);border-radius:999px;overflow:hidden;margin:4px 0 10px}
.k-progress i{display:block;height:100%;background:var(--app);border-radius:999px;transition:width .3s}
.k-meta{display:flex;justify-content:space-between;color:var(--muted);font-weight:700;font-size:15px}
.k-feedback{min-height:28px;text-align:center;font-weight:800;margin:4px 0}
.k-feedback.ok{color:var(--ok)}.k-feedback.bad{color:var(--bad)}

/* number pad */
.k-input{width:100%;font:600 34px/1 var(--display);text-align:center;border:2px solid var(--line);background:var(--surface2);border-radius:16px;padding:12px;letter-spacing:.04em}
.k-pad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}
.k-pad button{border:0;background:var(--surface2);border-radius:14px;padding:14px 0;font:600 24px/1 var(--display);box-shadow:0 3px 0 var(--line)}
.k-pad button:active{transform:translateY(2px);box-shadow:none}
.k-pad button.go{background:var(--app);color:var(--app-ink)}

/* stars & badges */
.stars{color:var(--gold);letter-spacing:2px;font-size:18px;white-space:nowrap}
.stars .off{color:var(--line)}
.k-badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}
.k-badge{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:12px 8px;text-align:center;font-size:13px;font-weight:700}
.k-badge .e{font-size:34px;display:block;filter:none}
.k-badge.locked{opacity:.45}.k-badge.locked .e{filter:grayscale(1)}

/* result */
.k-result{text-align:center;max-width:520px;margin:10px auto}
.k-result .bigstars{font-size:54px;color:var(--gold);letter-spacing:6px}
.k-result .bigstars .off{color:var(--line)}
.k-stat{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}
.k-stat div{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:12px 6px}
.k-stat b{display:block;font:600 26px/1.1 var(--display)}
.k-stat span{color:var(--muted);font-size:13px;font-weight:700}

/* toast & modal */
.k-toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(calc(100% + 40px));visibility:hidden;background:var(--navy);color:#fff;padding:12px 18px;border-radius:16px;font-weight:800;z-index:60;transition:transform .3s;display:flex;gap:10px;align-items:center;max-width:calc(100% - 32px);box-shadow:0 10px 30px rgba(0,0,0,.25)}
.k-toast.on{transform:translateX(-50%) translateY(0);visibility:visible}
.k-toast .e{font-size:26px}
.k-modal{position:fixed;inset:0;background:rgba(5,10,35,.55);display:none;align-items:center;justify-content:center;z-index:50;padding:16px}
.k-modal.on{display:flex}
.k-modal .box{background:var(--surface);border-radius:24px;max-width:560px;width:100%;max-height:88vh;overflow:auto;padding:22px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.k-modal table{width:100%;border-collapse:collapse;font-size:15px;margin:8px 0}
.k-modal th,.k-modal td{border-bottom:1px solid var(--line);padding:7px 6px;text-align:left}
.k-confetti{position:fixed;inset:0;pointer-events:none;z-index:70}
.k-pill{display:inline-block;background:var(--app-soft);color:var(--ink);border-radius:999px;padding:3px 11px;font-size:13px;font-weight:800}
.k-foot{text-align:center;color:var(--muted);font-size:13px;padding:24px 16px 32px}
.k-foot a{color:var(--muted)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}