/* ===========================================================================
   Curiosity Lab — styles
   Design tokens from the approved handoff (turn 3). Responsive, light + dark.
   Fonts: rounded system stack by default. To use the designed Baloo 2 / Nunito,
   drop the .woff2 files in /fonts and uncomment the @font-face blocks below.
   =========================================================================== */

/*  --- Optional self-hosted fonts (offline-first). Uncomment after adding files ---
@font-face{font-family:'Baloo 2';font-weight:600;src:url(../fonts/baloo2-600.woff2) format('woff2');font-display:swap}
@font-face{font-family:'Baloo 2';font-weight:700;src:url(../fonts/baloo2-700.woff2) format('woff2');font-display:swap}
@font-face{font-family:'Baloo 2';font-weight:800;src:url(../fonts/baloo2-800.woff2) format('woff2');font-display:swap}
@font-face{font-family:'Nunito';font-weight:400;src:url(../fonts/nunito-400.woff2) format('woff2');font-display:swap}
@font-face{font-family:'Nunito';font-weight:600;src:url(../fonts/nunito-600.woff2) format('woff2');font-display:swap}
@font-face{font-family:'Nunito';font-weight:700;src:url(../fonts/nunito-700.woff2) format('woff2');font-display:swap}
@font-face{font-family:'Nunito';font-weight:800;src:url(../fonts/nunito-800.woff2) format('woff2');font-display:swap}
*/

:root{
  --ink:#33294F; --muted:#8B8098;
  --primary:#6C4FD8; --primary-press:#5238B0;
  --green:#2E9E4E; --green-dark:#237A3C;
  --gold:#F0A81C; --gold-dark:#BE8310;
  --orange:#E8632C; --sun:#FFD44D;
  --raspberry:#E4566B;
  --bg1:#FAF2E2; --bg2:#EFE6F9;
  --card:#fff; --card-border:rgba(0,0,0,.06);
  --locked-fill:#F3EDE0; --locked-border:#D6CBB6; --locked-text:#9C8F78;
  --panel:#fff; --shadow:rgba(51,41,79,.14);
  --font-display:'Baloo 2','Fredoka','Trebuchet MS',system-ui,sans-serif;
  --font-body:'Nunito',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}
html[data-theme="dark"]{
  --ink:#EDE8FB; --muted:#9C92C4;
  --primary:#8A6FF0; --primary-press:#5F48C0;
  --bg1:#221C3E; --bg2:#2E2454;
  --card:rgba(255,255,255,.06); --card-border:rgba(255,255,255,.16);
  --locked-fill:rgba(255,255,255,.04); --locked-border:#524A78; --locked-text:#9C92C4;
  --panel:#2A2350; --shadow:rgba(0,0,0,.4);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:linear-gradient(160deg,var(--bg1),var(--bg2));
  background-attachment:fixed;
  -webkit-text-size-adjust:100%;
  overflow-x:hidden;
}
h1,h2,h3,.display{font-family:var(--font-display);margin:0}
button{font-family:var(--font-body);cursor:pointer;border:none;background:none;color:inherit}
img{max-width:100%}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:8px}

#app{min-height:100%;display:flex;flex-direction:column}
.screen{flex:1;width:100%;max-width:1194px;margin:0 auto;padding:18px clamp(14px,3vw,40px) 40px;animation:fade .25s ease-out}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*{animation-duration:.001s!important;transition-duration:.001s!important}}

/* --- chunky press buttons --- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:var(--font-display);font-weight:800;font-size:17px;
  color:#fff;background:var(--primary);
  border-radius:999px;padding:14px 24px;min-height:48px;
  box-shadow:0 5px 0 var(--primary-press);
  transition:transform .12s ease-out,box-shadow .12s ease-out;
  user-select:none;
}
.btn:active{transform:translateY(4px);box-shadow:0 1px 0 var(--primary-press)}
.btn.green{background:var(--green);box-shadow:0 5px 0 var(--green-dark)}
.btn.green:active{box-shadow:0 1px 0 var(--green-dark)}
.btn.gold{background:var(--gold);color:#4a3400;box-shadow:0 5px 0 var(--gold-dark)}
.btn.gold:active{box-shadow:0 1px 0 var(--gold-dark)}
.btn.ghost{background:var(--card);color:var(--ink);box-shadow:0 4px 0 var(--shadow);border:2px solid var(--card-border)}
.btn.ghost:active{box-shadow:0 1px 0 var(--shadow)}
.btn.small{font-size:14px;padding:10px 16px;min-height:44px;box-shadow:0 4px 0 var(--primary-press)}
.btn:disabled{opacity:.5;pointer-events:none}

.pill{display:inline-flex;align-items:center;gap:7px;background:var(--card);border:2px solid var(--card-border);
  border-radius:999px;padding:8px 14px;font-weight:800;font-size:13px;box-shadow:0 3px 0 var(--shadow)}
.chip{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:5px 12px;font-weight:800;font-size:13px}
.chip.gold{background:#FFF3D6;color:var(--gold-dark)}
.chip.tint{background:var(--bg2);color:var(--primary)}
html[data-theme="dark"] .chip.gold{background:rgba(240,168,28,.18);color:var(--sun)}

/* --- top bar --- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.brand{display:flex;align-items:center;gap:11px}
.logo{width:44px;height:44px;border-radius:14px;background:var(--primary);box-shadow:0 4px 0 var(--primary-press);
  display:flex;align-items:center;justify-content:center;font-size:24px}
.brand .name{font-family:var(--font-display);font-weight:800;font-size:22px}
.topbar .cluster{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.seg{display:flex;background:var(--card);border:2px solid var(--card-border);border-radius:999px;padding:4px;box-shadow:0 3px 0 var(--shadow)}
.seg button{border-radius:999px;padding:7px 13px;font-weight:800;font-size:13px;color:var(--muted)}
.seg button.on{background:var(--primary);color:#fff}
.icon-btn{width:44px;height:44px;border-radius:999px;background:var(--card);border:2px solid var(--card-border);
  box-shadow:0 3px 0 var(--shadow);display:flex;align-items:center;justify-content:center;font-size:20px}
.icon-btn:active{transform:translateY(2px);box-shadow:0 1px 0 var(--shadow)}

/* --- banner --- */
.banner{background:var(--card);border:2.5px solid var(--gold);border-radius:22px;padding:14px 22px;
  text-align:center;box-shadow:0 5px 0 rgba(240,168,28,.18);margin:8px 0 22px}
.banner h2{font-weight:800;font-size:19px}
.banner p{margin:4px 0 0;font-weight:700;font-size:15px;color:var(--gold-dark)}

/* --- lab map: serpentine expedition trail --- */
.mapscreen{max-width:1040px}
.expedition-pill{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;
  background:var(--card);border:2.5px solid var(--gold);border-radius:999px;padding:10px 24px;width:max-content;max-width:100%;
  margin:6px auto 26px;box-shadow:0 5px 0 rgba(240,168,28,.22)}
.expedition-pill b{font-family:var(--font-display);font-weight:800;font-size:18px}
.expedition-pill i{font-style:normal;font-weight:700;font-size:14px;color:var(--gold-dark)}
.expedition-pill .dia{width:11px;height:11px;background:var(--gold);transform:rotate(45deg);border-radius:2px;flex:none}

.trailmap{display:flex;flex-direction:column;align-items:stretch;gap:0;margin:0 auto;max-width:920px}
.trailrow{display:flex;justify-content:center;align-items:flex-start;gap:0}
.trailrow.rev{flex-direction:row-reverse}
.node{width:174px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:9px;background:none;position:relative;padding-top:14px}
.node .disc{width:118px;height:118px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  position:relative;box-sizing:border-box;transition:transform .12s}
.node.open:active .disc{transform:translateY(3px)}
.node.current .disc{width:140px;height:140px}
.node .ico{width:60%;display:flex;align-items:center;justify-content:center}
.node.current .ico{width:56%}
.node .ico svg{width:100%;height:auto;display:block}
.node .ico.muted{opacity:.5;filter:grayscale(.5)}
.node .nname{font-family:var(--font-display);font-weight:800;font-size:18px;line-height:1.05}
.node .nmeta{font-size:12.5px;font-weight:700;color:var(--muted)}
.mbadge{position:absolute;font-family:var(--font-display);font-weight:800;font-size:11px;letter-spacing:.03em;
  color:#fff;padding:4px 11px;border-radius:999px;white-space:nowrap;z-index:3;box-shadow:0 3px 0 rgba(0,0,0,.15)}
.mbadge.here{top:-6px;left:50%;transform:translateX(-50%);background:var(--primary)}
.mbadge.open{top:-2px;right:14px;background:var(--green)}
.keepbtn{color:#fff;border-radius:999px;padding:8px 18px;font-family:var(--font-display);font-weight:800;font-size:14px;box-shadow:0 4px 0 rgba(0,0,0,.18)}
.lock-pill{background:#fff;color:var(--locked-text);border:2px solid var(--locked-border);border-radius:999px;
  padding:4px 12px;font-size:12px;font-weight:800;display:inline-flex;gap:5px;align-items:center}
html[data-theme="dark"] .lock-pill{background:rgba(255,255,255,.06)}
/* chain connectors */
.chain{display:flex;align-items:center;gap:7px;align-self:center;margin-top:44px;flex:none}
.chain i{width:15px;height:11px;border-radius:50%;box-sizing:border-box}
.chain.lit i:nth-child(odd){border-top:4px solid #7C5BE0}
.chain.lit i:nth-child(even){border-bottom:4px solid #F0A81C}
.chain.dim i:nth-child(odd){border-top:4px solid #C4B494}
.chain.dim i:nth-child(even){border-bottom:4px solid #E2D7BC}
.turn{display:flex;height:24px;margin:-6px 0}
.turn.right{justify-content:flex-end;padding-right:78px}
.turn.left{justify-content:flex-start;padding-left:78px}
.chain.v{flex-direction:column;gap:6px;margin:0}
.chain.v i{width:11px;height:14px}
.chain.v.lit i:nth-child(odd),.turn.lit .chain.v i:nth-child(odd){border-top:none;border-left:4px solid #7C5BE0}
.turn.lit .chain.v i:nth-child(even){border-bottom:none;border-right:4px solid #F0A81C}
.turn.dim .chain.v i:nth-child(odd){border-left:4px solid #C4B494}
.turn.dim .chain.v i:nth-child(even){border-right:4px solid #E2D7BC}
@media (max-width:840px){
  .trailrow,.trailrow.rev{flex-wrap:wrap;flex-direction:row;gap:6px 0}
  .node{width:44%}
  .chain,.turn{display:none}
}
@media (max-width:460px){ .node{width:50%} }

/* --- wonder card --- */
.wonder{background:var(--card);border:2.5px solid var(--gold);border-radius:26px;padding:18px 20px;max-width:380px;
  margin:24px auto 0;box-shadow:0 6px 0 rgba(240,168,28,.16)}
.wonder .wtop{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.wonder .wsun{width:34px;height:34px;border-radius:12px;background:#FCE8C4;flex:none;position:relative}
.wonder .wsun::after{content:"";position:absolute;inset:0;margin:auto;width:15px;height:15px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(240,168,28,.3)}
html[data-theme="dark"] .wonder .wsun{background:rgba(240,168,28,.2)}
.wonder .lbl{font-family:var(--font-display);font-weight:800;font-size:12px;letter-spacing:.08em;color:var(--gold-dark);text-transform:uppercase}
.wonder .f{font-family:var(--font-display);font-weight:800;font-size:20px;margin:8px 0 14px;line-height:1.2}

/* --- zone screen --- */
.zone-head{display:flex;align-items:center;gap:14px;margin:6px 0 14px;flex-wrap:wrap}
.zone-tile{width:66px;height:66px;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:34px;
  border:3px solid #fff;box-shadow:0 5px 0 var(--shadow)}
.zone-head .zt{font-family:var(--font-display);font-weight:800;font-size:28px}
.zone-head .zsub{font-size:14px;font-weight:700;color:var(--muted)}
.progressbar{height:14px;border-radius:999px;background:var(--card-border);overflow:hidden;max-width:640px;margin:6px 0 22px}
.progressbar > i{display:block;height:100%;border-radius:999px;background:var(--green);transition:width .4s}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.topic{background:var(--card);border:2.5px solid var(--card-border);border-radius:24px;padding:0;text-align:left;overflow:hidden;
  box-shadow:0 5px 0 var(--shadow);transition:transform .12s;display:flex;flex-direction:column}
.topic:active{transform:translateY(3px);box-shadow:0 2px 0 var(--shadow)}
.topic .thead{position:relative;display:flex;align-items:center;gap:12px;padding:16px 16px 14px}
.topic .tico{width:56px;height:56px;flex:none;display:flex;align-items:center;justify-content:center;
  background:#fff;border-radius:18px;box-shadow:0 3px 0 rgba(0,0,0,.08);padding:8px}
.topic .tico svg{width:100%;height:auto}
.topic .tnum{font-family:var(--font-display);font-weight:800;font-size:18px;letter-spacing:.02em}
.topic .thead .chip.gold{position:absolute;top:12px;right:12px}
.topic .tick{position:absolute;top:12px;right:12px;width:28px;height:28px;border-radius:50%;background:var(--green);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800;box-shadow:0 2px 0 var(--green-dark)}
.topic .tprev{list-style:none;margin:0;padding:14px 16px 6px;display:flex;flex-direction:column;gap:10px;flex:1}
.topic .tprev li{display:flex;gap:9px;align-items:flex-start;font-weight:700;font-size:13.5px;line-height:1.32;color:var(--ink)}
.topic .tprev .dotc{width:9px;height:9px;border-radius:50%;flex:none;margin-top:5px}
.topic .tfoot{display:flex;align-items:center;justify-content:space-between;padding:10px 16px 15px;border-top:2px solid var(--card-border);margin-top:4px}
.topic .tm{font-size:12.5px;font-weight:800;color:var(--muted)}
.topic .tgo{font-family:var(--font-display);font-weight:800;font-size:15px}
.topic.done{border-color:var(--green)}
.age-4-7 .topic .tprev li{font-size:15px}

/* --- explore / fact card --- */
.card-wrap{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:70vh;text-align:center}
.factcard{background:var(--card);border:2.5px solid var(--card-border);border-radius:34px;
  max-width:720px;width:100%;padding:26px clamp(18px,4vw,40px) 28px;box-shadow:0 8px 0 var(--shadow)}
.factcard .hero{height:200px;border-radius:22px;margin-bottom:18px;display:flex;align-items:center;justify-content:center;font-size:80px}
.factcard .hero .heroico{width:150px;max-width:52%;display:flex}
.factcard .hero .heroico svg{width:100%;height:auto;filter:drop-shadow(0 4px 3px rgba(0,0,0,.12))}
.factcard .head{font-family:var(--font-display);font-weight:800;font-size:clamp(26px,4.4vw,34px);line-height:1.12}
.factcard .why{font-weight:600;font-size:18px;color:var(--ink);opacity:.86;margin:14px 0 0;line-height:1.4}
.factcard .note{font-size:13px;font-weight:700;color:var(--muted);margin-top:10px;font-style:italic}
.age-4-7 .factcard .head{font-size:clamp(30px,5.5vw,42px)}
.age-4-7 .factcard .why,.age-4-7 .factcard .chips{display:none}
.factcard .chips{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:16px}
.action-row{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:22px;flex-wrap:wrap}
.dots{display:flex;gap:8px}
.dots i{width:10px;height:10px;border-radius:50%;background:var(--card-border)}
.dots i.on{background:var(--primary)}
.hint{margin-top:16px;font-size:13px;font-weight:700;color:var(--muted)}

/* --- quiz --- */
.quiz-head{display:flex;align-items:center;gap:14px;justify-content:space-between;flex-wrap:wrap;margin-bottom:8px}
.q-text{font-family:var(--font-display);font-weight:800;font-size:clamp(24px,4vw,34px);text-align:center;margin:18px auto 22px;max-width:820px;line-height:1.18}
.answers{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:860px;margin:0 auto}
@media (max-width:560px){.answers{grid-template-columns:1fr}}
.ans{background:var(--card);border:3px solid var(--card-border);border-radius:22px;padding:18px;
  font-family:var(--font-display);font-weight:800;font-size:19px;text-align:center;box-shadow:0 5px 0 var(--shadow);
  transition:transform .1s;min-height:64px}
.ans:active{transform:translateY(3px);box-shadow:0 2px 0 var(--shadow)}
.ans.correct{background:#E2F5E6;border-color:var(--green);color:var(--green-dark)}
.ans.wrong{background:#FBE3E7;border-color:var(--raspberry);color:#b23048}
.ans.dim{opacity:.5}
html[data-theme="dark"] .ans.correct{background:rgba(46,158,78,.22)}
html[data-theme="dark"] .ans.wrong{background:rgba(228,86,107,.22)}
.feedback{max-width:860px;margin:20px auto 0;border-radius:22px;padding:18px 20px;color:#fff;text-align:left;
  display:flex;gap:14px;align-items:flex-start}
.feedback.ok{background:var(--green)}
.feedback.no{background:var(--raspberry)}
.feedback .fb-emoji{font-size:30px;line-height:1}
.feedback h3{font-weight:800;font-size:18px}
.feedback p{margin:4px 0 0;font-weight:600;font-size:14px;opacity:.95}
.pointpop{position:fixed;left:50%;top:40%;transform:translateX(-50%);font-family:var(--font-display);font-weight:800;
  font-size:40px;color:var(--gold);text-shadow:0 2px 0 var(--gold-dark);pointer-events:none;animation:pop 1s ease-out forwards;z-index:60}
@keyframes pop{0%{opacity:0;transform:translate(-50%,10px) scale(.6)}25%{opacity:1;transform:translate(-50%,-6px) scale(1.1)}
  100%{opacity:0;transform:translate(-50%,-60px) scale(1)}}

/* --- experiments --- */
.exp-wrap{display:grid;grid-template-columns:minmax(320px,560px) 1fr;gap:24px;align-items:start}
@media (max-width:900px){.exp-wrap{grid-template-columns:1fr}}
.stage{background:var(--card);border:2.5px solid var(--card-border);border-radius:26px;padding:18px;box-shadow:0 6px 0 var(--shadow);position:relative}
.readout{font-family:var(--font-display);font-weight:800;font-size:20px;text-align:center;margin:12px 0}
.readout b{color:var(--primary)}
.ctrl{background:var(--card);border:2px solid var(--card-border);border-radius:20px;padding:16px;margin-bottom:14px;box-shadow:0 4px 0 var(--shadow)}
.ctrl h4{font-family:var(--font-display);font-weight:800;font-size:15px;margin:0 0 10px}
.ctrl input[type=range]{width:100%;accent-color:var(--primary);height:26px}
.ctrl .val{font-weight:800;color:var(--primary)}
.ctrl .hintline{font-size:12px;font-weight:700;color:var(--muted);margin-top:8px}
.segbtns{display:flex;gap:8px;flex-wrap:wrap}
.segbtns button{border:2px solid var(--card-border);border-radius:14px;padding:10px 14px;font-weight:800;background:var(--card);box-shadow:0 3px 0 var(--shadow)}
.segbtns button.on{background:var(--primary);color:#fff;border-color:var(--primary)}
.explain{border-radius:22px;padding:18px 20px;color:#fff}
.explain .el{font-family:var(--font-display);font-weight:800;font-size:12px;letter-spacing:.06em;text-transform:uppercase;opacity:.85}
.explain p{margin:8px 0 12px;font-weight:600;font-size:15px;line-height:1.4}
.safety{background:#FFEDD6;color:#9a4a12;border-radius:999px;padding:6px 14px;font-weight:800;font-size:13px;display:inline-flex;gap:6px;align-items:center}
html[data-theme="dark"] .safety{background:rgba(232,99,44,.2);color:#f0a36e}

/* --- sticker book --- */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 20px}
.tabs button{border-radius:999px;padding:8px 14px;font-weight:800;font-size:13px;border:2px solid var(--card-border);background:var(--card);box-shadow:0 3px 0 var(--shadow)}
.tabs button.on{background:var(--primary);color:#fff;border-color:var(--primary)}
.sticker-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px}
.sticker{background:var(--card);border:3px solid var(--card-border);border-radius:22px;padding:14px;text-align:center;box-shadow:0 5px 0 var(--shadow)}
.sticker.earned{transform:rotate(-1.5deg)}
.sticker.earned:nth-child(even){transform:rotate(1.5deg)}
.sticker .art{font-size:56px;line-height:1}
.sticker.locked{border-style:dashed;opacity:.7}
.sticker.locked .art{filter:grayscale(1);opacity:.4}
.sticker .sn{font-family:var(--font-display);font-weight:800;font-size:15px;margin-top:8px}
.sticker .sh{font-size:12px;font-weight:700;color:var(--muted);margin-top:2px}

/* --- splash / onboarding --- */
.splash{display:grid;grid-template-columns:minmax(280px,480px) 1fr;min-height:100vh;max-width:1194px;margin:0 auto}
@media (max-width:820px){.splash{grid-template-columns:1fr}}
.splash .left{background:linear-gradient(160deg,#6C4FD8,#4A2FA8);color:#fff;padding:44px clamp(24px,4vw,48px);display:flex;flex-direction:column;justify-content:center;gap:16px}
.splash .left h1{font-size:clamp(30px,5vw,44px);font-weight:800;line-height:1.1}
.splash .left .tag{font-weight:700;font-size:17px;opacity:.92}
.splash .feat{display:flex;gap:10px;align-items:flex-start;font-weight:700;font-size:15px}
.splash .feat .ck{width:26px;height:26px;border-radius:50%;background:var(--sun);color:#4a3400;display:flex;align-items:center;justify-content:center;font-weight:800;flex:none}
.splash .right{padding:44px clamp(24px,4vw,48px);display:flex;flex-direction:column;justify-content:center;gap:14px}
.or{display:flex;align-items:center;gap:12px;color:var(--muted);font-weight:800;font-size:13px}
.or::before,.or::after{content:"";flex:1;height:2px;background:var(--card-border)}
.info-card{background:var(--bg2);border:2px solid var(--card-border);border-radius:18px;padding:14px 16px;font-weight:600;font-size:14px;color:var(--ink)}
html[data-theme="dark"] .info-card{background:rgba(138,111,240,.14)}
.grownup{background:var(--card);border:2px solid var(--card-border);border-radius:18px;padding:14px 16px;font-size:12.5px;font-weight:600;color:var(--muted);line-height:1.5}
.grownup b{color:var(--ink)}

/* --- zone picker --- */
.picker-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:18px;max-width:820px;margin:22px auto}
.pick{display:flex;flex-direction:column;align-items:center;gap:8px;background:none}
.pick .disc{width:96px;height:96px;border-radius:50%;border:4px solid #fff;display:flex;align-items:center;justify-content:center;font-size:42px;box-shadow:0 6px 0 var(--shadow);transition:transform .12s}
.pick .disc .ico{width:58%;display:flex}.pick .disc .ico svg{width:100%;height:auto}
.pick.sel .disc{outline:4px solid var(--primary);outline-offset:3px;transform:translateY(-3px)}
.pick .pn{font-weight:800;font-size:13px;text-align:center}
.pick.surprise .disc{border-style:dashed;background:var(--locked-fill)}

.center{text-align:center}
.mt{margin-top:20px}.mb{margin-bottom:16px}
.back{margin-bottom:12px}
.speaker{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:18px;box-shadow:0 4px 0 var(--primary-press);flex:none}
.speaker.orange{background:var(--orange);box-shadow:0 4px 0 #b8471d}
.speaker:active{transform:translateY(2px)}
.termchip{display:flex;align-items:center;gap:12px;background:var(--card);border:2px solid var(--card-border);border-radius:18px;padding:12px 14px;box-shadow:0 4px 0 var(--shadow)}
.termchip .tinfo{flex:1;text-align:left}
.termchip .tw{font-family:var(--font-display);font-weight:800;font-size:18px}
.termchip .tp{font-size:13px;font-weight:800;color:var(--primary)}
.termchip .tm{font-size:13px;font-weight:600;color:var(--muted)}
.term-panel{background:var(--card);border:2px solid var(--card-border);border-radius:24px;padding:18px;margin-top:22px;box-shadow:0 5px 0 var(--shadow)}
.term-panel h3{font-family:var(--font-display);font-weight:800;font-size:14px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.term-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.sub-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:8px}
.offline-toast{position:fixed;bottom:16px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-weight:800;font-size:13px;z-index:80;box-shadow:0 6px 20px rgba(0,0,0,.3)}

/* --- interactive anatomy explorer --- */
.sys-switch{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:6px 0 18px;max-width:760px}
@media (max-width:640px){.sys-switch{grid-template-columns:repeat(2,1fr)}}
.sysbtn{display:flex;align-items:center;gap:11px;background:var(--card);border:2.5px solid var(--card-border);
  border-radius:20px;padding:12px 14px;text-align:left;box-shadow:0 4px 0 var(--shadow);transition:transform .12s}
.sysbtn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--shadow)}
.sysbtn.on{border-color:var(--sd);background:var(--st)}
html[data-theme="dark"] .sysbtn.on{background:color-mix(in srgb,var(--sd) 26%,transparent)}
.sysbtn .se{width:44px;height:44px;border-radius:14px;background:var(--st);display:flex;align-items:center;justify-content:center;font-size:24px;flex:none}
.sysbtn.on .se{background:#fff}
.sysbtn .sl{display:flex;flex-direction:column;line-height:1.15}
.sysbtn .sl b{font-family:var(--font-display);font-weight:800;font-size:17px}
.sysbtn .sl i{font-style:normal;font-size:12px;font-weight:700;color:var(--muted)}
.anatomy-wrap{display:grid;grid-template-columns:minmax(260px,1fr) 1.1fr;gap:22px;align-items:start}
@media (max-width:820px){.anatomy-wrap{grid-template-columns:1fr}}
.body-stage{background:var(--card);border:2.5px solid var(--card-border);border-radius:28px;padding:14px;
  box-shadow:0 6px 0 var(--shadow);position:relative}
.body-hint{font-size:13px;font-weight:800;color:var(--muted);text-align:center;margin:2px 0 6px}
.bodysvg{display:block;width:100%;max-height:62vh;margin:0 auto}
.hs{cursor:pointer}
.hs .halo{fill:rgba(0,0,0,0);stroke-width:0}
.hs .dot{stroke:#fff;stroke-width:2.5px;transition:transform .15s}
.hs .dt{font-family:var(--font-display);font-weight:800;font-size:12px;fill:#fff;pointer-events:none}
.hs .halo{animation:hspulse 1.8s ease-out infinite;transform-origin:center}
.hs.found .halo{animation:none}
.hs.found .dot{fill:var(--green)!important}
.hs:hover .dot{transform:scale(1.18)}
.hs.on .dot{transform:scale(1.35);stroke:var(--ink)}
.hs.on .halo{fill:rgba(0,0,0,.06);animation:none}
@keyframes hspulse{0%{stroke:currentColor;stroke-width:2px;r:12;opacity:.5}100%{stroke:currentColor;stroke-width:0;r:20;opacity:0}}
.hs .halo{color:var(--gold);stroke:var(--gold)}
.detail-col{position:sticky;top:12px}
.detail-card{background:var(--card);border:2.5px solid var(--card-border);border-radius:26px;overflow:hidden;box-shadow:0 6px 0 var(--shadow)}
.detail-card.empty{padding:26px 22px;text-align:center}
.detail-card.empty .de-emoji{font-size:52px}
.detail-card.empty h3{font-family:var(--font-display);font-weight:800;font-size:24px;margin:6px 0}
.detail-card.empty p{font-weight:700;color:var(--muted);font-size:15px;margin:6px 0;line-height:1.4}
.detail-card.empty .tap-cta{color:var(--ink);opacity:.85}
.mini-prog{height:12px;border-radius:999px;background:var(--card-border);overflow:hidden;max-width:280px;margin:16px auto 6px}
.mini-prog > i{display:block;height:100%;border-radius:999px;transition:width .4s}
.mini-prog-l{font-size:12px;font-weight:800;color:var(--muted);margin-bottom:14px}
.dc-diagram{position:relative;display:flex;align-items:center;justify-content:center;padding:22px;min-height:190px}
.dc-big{width:170px;max-width:60%;display:flex}
.dc-big svg{width:100%;height:auto;filter:drop-shadow(0 5px 4px rgba(0,0,0,.14))}
.dc-label{position:absolute;top:12px;left:12px;color:#fff;font-family:var(--font-display);font-weight:800;font-size:12px;
  letter-spacing:.04em;padding:4px 12px;border-radius:999px;box-shadow:0 2px 0 rgba(0,0,0,.15)}
.dc-top{display:flex;align-items:center;gap:14px;padding:16px 20px 4px}
.dc-headings{flex:1;min-width:0}
.dc-term{font-family:var(--font-display);font-weight:800;font-size:28px;line-height:1.05}
.dc-pron{font-weight:800;font-size:16px;color:var(--ink);opacity:.72;margin-top:2px;letter-spacing:.02em}
.speaker.big{width:54px;height:54px;font-size:24px}
.dc-body{padding:18px 22px 6px}
.dc-fact{font-family:var(--font-display);font-weight:800;font-size:20px;line-height:1.22}
.dc-why{font-weight:600;font-size:15.5px;color:var(--ink);opacity:.85;margin-top:10px;line-height:1.45}
.dc-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 22px 20px}
.age-4-7 .dc-why{display:none}

/* --- account / profile screen --- */
.acct-wrap{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start;max-width:920px;margin:8px auto 0}
@media (max-width:780px){.acct-wrap{grid-template-columns:1fr}}
.acct-hero{background:linear-gradient(160deg,#6C4FD8,#4A2FA8);color:#fff;border-radius:26px;padding:26px 24px;box-shadow:0 7px 0 rgba(74,47,168,.4)}
.acct-hero h1{font-size:30px;font-weight:800;margin:12px 0 6px}
.acct-hero .sub{font-weight:700;font-size:15px;opacity:.92;line-height:1.4}
.acct-perks{list-style:none;padding:0;margin:16px 0 0;display:flex;flex-direction:column;gap:11px}
.acct-perks li{display:flex;gap:11px;align-items:flex-start;font-weight:700;font-size:14.5px;line-height:1.35}
.acct-perks li span{font-size:19px;flex:none}
.acct-form{background:var(--card);border:2.5px solid var(--card-border);border-radius:26px;padding:24px 22px;box-shadow:0 6px 0 var(--shadow)}
.fld{display:block;margin-bottom:16px}
.fld > span{display:block;font-family:var(--font-display);font-weight:800;font-size:15px;margin-bottom:7px}
.fld > span i{font-style:normal;font-weight:700;font-size:13px;color:var(--muted)}
.fld input{width:100%;border:2.5px solid var(--card-border);border-radius:16px;padding:14px 16px;font-family:var(--font-body);
  font-weight:700;font-size:16px;background:var(--bg1);color:var(--ink)}
html[data-theme="dark"] .fld input{background:rgba(255,255,255,.06)}
.fld input:focus{outline:none;border-color:var(--primary)}
.fld-err{color:#c0304a;font-weight:800;font-size:13.5px;min-height:18px;margin-bottom:6px}
html[data-theme="dark"] .fld-err{color:#ff9db0}