:root{
  --abyss:#0b3c5d; --ocean:#1e88e5; --lagoon:#4fc3f7; --foam:#e1f5fe;
  --coral:#ff7043; --sun:#ffd54f; --leaf:#66bb6a; --grape:#ab47bc; --ink:#1a2e3b;
  --font:'Fredoka','Baloo 2','Nunito','Segoe UI Rounded',system-ui,sans-serif;
  --safe-t:env(safe-area-inset-top,0px); --safe-b:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;margin:0}
body{
  font-family:var(--font);color:var(--ink);overflow:hidden;
  background:linear-gradient(180deg,#0b3c5d 0%,#1565c0 52%,#29b6f6 100%);
  user-select:none;-webkit-user-select:none;touch-action:manipulation;
}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;padding:0}
[hidden]{display:none!important}
:focus-visible{outline:4px solid var(--sun);outline-offset:3px;border-radius:14px}
#bgCanvas,#confetti{position:fixed;inset:0;width:100%;height:100%;pointer-events:none}
#bgCanvas{z-index:0}
#confetti{z-index:60}

/* ---------- layout ---------- */
#app{
  position:relative;z-index:5;width:100%;max-width:900px;margin:0 auto;
  height:100vh;height:100dvh;
  padding:calc(10px + var(--safe-t)) 12px calc(10px + var(--safe-b));
}
.screen{position:absolute;inset:0;padding:inherit;display:none;flex-direction:column}
.screen.active{display:flex;animation:screenIn .35s ease-out both}
.center{align-items:center;justify-content:center;text-align:center;gap:10px;color:#fff}
.glass{
  background:rgba(255,255,255,.93);border:3px solid var(--foam);border-radius:26px;
  box-shadow:0 14px 34px rgba(11,60,93,.3);
}
.spacer{flex:1}

/* ---------- buttons ---------- */
.btn{
  --c1:#fff;--c2:#e8f4fb;--edge:#b3d9ea;--fg:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;gap:.45em;
  padding:.6em 1.1em;border-radius:20px;font-weight:700;font-size:18px;color:var(--fg);
  background:linear-gradient(180deg,var(--c1),var(--c2));border:3px solid var(--edge);
  box-shadow:0 6px 0 var(--edge),0 12px 18px rgba(0,0,0,.18);
  transition:transform .1s,box-shadow .1s,filter .2s;
}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:translateY(5px);box-shadow:0 1px 0 var(--edge),0 3px 6px rgba(0,0,0,.2)}
.btn:disabled{opacity:.55;pointer-events:none}
.btn-coral{--c1:#ff8a65;--c2:#ff7043;--edge:#cf3f12;--fg:#fff}
.btn-green{--c1:#8fd694;--c2:#43a047;--edge:#2a7a2e;--fg:#fff}
.btn-blue{--c1:#56b0f7;--c2:#1e88e5;--edge:#1259a8;--fg:#fff}
.btn-grape{--c1:#c47ad2;--c2:#8e24aa;--edge:#5e1773;--fg:#fff}
.btn-amber{--c1:#ffe591;--c2:#ffca28;--edge:#d49a00;--fg:#5d3b00}
.btn-white{--c1:#fff;--c2:#e8f4fb;--edge:#b3d9ea}
.btn-icon{width:50px;height:50px;padding:0;border-radius:50%;font-size:22px}
.btn-xl{font-size:clamp(22px,5vw,32px);padding:.65em 1.5em;border-radius:999px}
.link{color:#546e7a;font-weight:700;text-decoration:underline;font-size:18px}

/* ---------- titles ---------- */
.title{
  margin:0;font-weight:700;line-height:.95;color:var(--sun);letter-spacing:.02em;
  font-size:clamp(44px,11vw,88px);text-shadow:0 5px 0 #0b3c5d,0 12px 22px rgba(0,0,0,.35);
}
.title-sm{font-size:clamp(34px,8vw,58px)}
.subtitle{
  font-weight:700;color:#b9ecff;letter-spacing:.35em;text-transform:uppercase;
  font-size:clamp(13px,3.2vw,20px);text-shadow:0 2px 0 rgba(11,60,93,.8);
}
.tagline{font-size:clamp(17px,3.6vw,23px);font-weight:500;color:#d5f1ff;max-width:22em;margin:6px 0 12px}

/* ---------- splash ---------- */
.sea-art{position:relative;width:min(300px,72vw);height:min(210px,28vh);margin-bottom:4px}
.sea-art .sea{
  position:absolute;left:0;right:0;top:46%;bottom:0;border-radius:28px;overflow:hidden;
  background:linear-gradient(180deg,rgba(125,211,252,.85),rgba(21,101,192,.95));
  border:3px solid rgba(255,255,255,.6);
}
.sea-art .sea::before{
  content:"";position:absolute;left:-10%;right:-10%;top:-9px;height:18px;border-radius:50%;
  background:rgba(255,255,255,.55);animation:waveSlide 3s ease-in-out infinite alternate;
}
.sea-art .a{position:absolute}
#splashDuck{left:10%;top:4%;width:34%;animation:bob 2.4s ease-in-out infinite}
#splashApple{right:12%;top:14%;width:25%;animation:bob 2.9s ease-in-out infinite reverse}
#splashAnchor{left:38%;top:52%;width:26%;animation:sinkloop 3.6s ease-in infinite}

/* ---------- home ---------- */
.topbar{display:flex;align-items:center;gap:10px;z-index:3}
.hub{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;text-align:center;min-height:0}
.mascot-big{width:clamp(90px,16vh,140px);height:clamp(90px,16vh,140px);animation:bob 2.6s ease-in-out infinite}
.mascot{width:100%;height:100%;display:block}
.modes{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;margin:10px 0 4px}
.mode{flex-direction:column;gap:2px;width:min(250px,44vw);padding:14px 10px;border-radius:30px}
.mode .mode-art{display:flex;gap:2px;width:92px;height:56px;justify-content:center}
.mode .mode-art .art{width:56px;height:56px}
.mode-name{font-size:clamp(20px,4.6vw,27px);font-weight:700}
.mode-desc{font-size:14px;font-weight:600;opacity:.92}
.pill-stat{
  background:rgba(255,255,255,.9);border:3px solid #ffe082;border-radius:999px;
  padding:6px 18px;font-weight:700;font-size:18px;color:#8a5200;
}

/* ---------- game ---------- */
.hud{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:7px 10px;flex:none}
.btn-sm{width:44px;height:44px;font-size:19px;box-shadow:0 4px 0 var(--edge)}
.hud-mid{display:flex;flex-direction:column;align-items:center;gap:5px;font-weight:700;color:#37474f;font-size:15px;letter-spacing:.04em}
.hud-mid b{color:#0288d1;font-size:1.35em}
.hud-right{display:flex;align-items:center;gap:8px}
.dots{display:flex;gap:5px}
.dot{width:12px;height:12px;border-radius:50%;background:#cfd8dc;border:2px solid #b0bec5;transition:all .25s}
.dot.cur{background:#4fc3f7;border-color:#fff;box-shadow:0 0 0 3px #b3e5fc;transform:scale(1.2)}
.dot.ok{background:#66bb6a;border-color:#2e7d32}
.dot.no{background:#ffb74d;border-color:#ef6c00}
.score,.streak{
  display:flex;align-items:center;gap:4px;font-weight:700;font-size:19px;
  background:#fff3c4;border:2px solid #ffd54f;color:#a35a00;padding:2px 10px;border-radius:999px;
}
.streak{background:#ffe0d6;border-color:#ff8a65;color:#b23a10}
.pop{animation:pop .45s cubic-bezier(.34,1.56,.64,1)}

#tank{
  position:relative;flex:1;min-height:0;margin-top:10px;border-radius:30px;overflow:hidden;
  border:6px solid var(--foam);background:#bfe8fb;touch-action:none;
  box-shadow:0 18px 40px rgba(0,30,60,.45),inset 0 0 0 3px rgba(255,255,255,.4);
}
#tank canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
#cvBack{z-index:1}
#obj{position:absolute;left:0;top:0;z-index:2;will-change:transform;touch-action:none;filter:drop-shadow(0 6px 6px rgba(0,40,80,.25))}
#obj.grabbable{cursor:grab}
#obj.dragging{cursor:grabbing}
#obj .art{width:100%;height:100%;display:block;pointer-events:none}
#cvFront{z-index:3}
#tank::after{
  content:"";position:absolute;inset:0;z-index:7;pointer-events:none;
  background:linear-gradient(115deg,rgba(255,255,255,.38) 0,rgba(255,255,255,0) 20%),
             linear-gradient(115deg,rgba(255,255,255,0) 72%,rgba(255,255,255,.16) 77%,rgba(255,255,255,0) 83%);
}
.liq-pills{position:absolute;top:10px;left:10px;z-index:6;display:flex;gap:6px;flex-wrap:wrap;max-width:calc(100% - 20px)}
.liq{
  display:inline-flex;align-items:center;gap:5px;padding:5px 11px;border-radius:999px;font-weight:700;font-size:14px;
  border:3px solid rgba(255,255,255,.95);background:rgba(255,255,255,.55);color:#0b3c5d;
  backdrop-filter:blur(4px);transition:transform .15s,background .2s;
}
.liq small{opacity:.65;font-weight:600;font-size:12px}
.liq.on{background:#fff;box-shadow:0 4px 0 rgba(0,0,0,.16);transform:translateY(-1px)}
.liq:disabled{cursor:default}
.obj-chip{
  position:absolute;top:10px;right:10px;z-index:6;background:rgba(255,255,255,.93);border:3px solid #fff;
  border-radius:16px;padding:4px 12px;font-weight:700;font-size:16px;text-align:right;line-height:1.15;color:#0b3c5d;
}
.obj-chip small{display:block;font-size:12px;color:#546e7a;font-weight:600}
.tank-hint{
  position:absolute;left:50%;top:50%;z-index:6;transform:translate(-50%,-50%);pointer-events:none;
  background:rgba(11,60,93,.78);color:#fff;font-weight:700;padding:6px 14px;border-radius:999px;font-size:15px;
  animation:breathe 2s ease-in-out infinite;white-space:nowrap;
}
@media (max-width:560px){
  .obj-chip{top:52px;right:auto;left:10px;text-align:left}
}

.dock{position:relative;flex:none;min-height:0;margin-top:10px}
.pane{display:none;flex-direction:column;justify-content:center;gap:8px}
.pane.active{display:flex;animation:screenIn .25s ease-out both}
#paneQuiz{flex-direction:row;gap:14px;align-items:center}
#paneQuiz .btn{flex:1;font-size:clamp(26px,6vw,36px);padding:.6em 0;border-radius:28px;gap:.35em}
#paneQuiz .btn span.big{font-size:1.35em}
.fact{display:flex;gap:12px;align-items:center;padding:8px 14px;flex:none;overflow:visible}
.fact .mascot-sm{width:62px;height:62px;flex:none}
.fact h3{margin:0;font-size:clamp(19px,4.4vw,25px);color:#8a5200;line-height:1.1}
.fact p{margin:2px 0 0;font-weight:500;font-size:clamp(13px,3.2vw,16px);line-height:1.3}
.dens{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:4px;font-size:13px;font-weight:700}
.chip{padding:2px 9px;border-radius:999px;background:#e1f5fe;color:#01579b;white-space:nowrap}
.chip.warm{background:#fff3c4;color:#8a5200}
.chip.good{background:#e0f5e1;color:#1b6b24}
.btn-next{width:100%;font-size:clamp(21px,5vw,28px);padding:.5em 0;flex:none}
.tray{
  display:flex;gap:8px;overflow-x:auto;padding:4px 4px 9px;scroll-snap-type:x proximity;flex:none;
  scrollbar-width:thin;
}
.tray-item{
  flex:0 0 auto;width:58px;height:58px;border-radius:17px;background:rgba(255,255,255,.92);
  border:3px solid #b3e5fc;padding:5px;scroll-snap-align:center;transition:transform .15s,border-color .15s;
}
.tray-item.on{border-color:#ffb300;background:#fff8e1;transform:translateY(-4px)}
.tray-item .art{width:100%;height:100%;display:block}
.sb-row{display:flex;align-items:center;gap:10px;flex:none}
.strip{
  flex:1;min-width:0;background:rgba(255,255,255,.92);border:3px solid var(--foam);border-radius:18px;
  padding:5px 12px;font-weight:600;font-size:clamp(12.5px,3vw,15px);line-height:1.25;min-height:50px;
  display:flex;align-items:center;color:#1a2e3b;
}

/* ---------- summary ---------- */
.summary{max-width:480px;width:100%;padding:22px 20px;display:flex;flex-direction:column;align-items:center;gap:8px;animation:popIn .45s cubic-bezier(.34,1.56,.64,1) both}
.summary h2{margin:0;font-size:clamp(30px,8vw,44px);color:#8a5200;line-height:1}
.summary .sub{font-size:20px;font-weight:600;color:#546e7a}
.scorebox{background:#fff3c4;border:4px solid #ffd54f;border-radius:24px;padding:12px 16px;width:100%}
.stars{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;font-size:30px;min-height:40px}
.stars span{transition:transform .3s cubic-bezier(.34,1.56,.64,1);transform:scale(0)}
.stars span.in{transform:scale(1)}
.scoretext{font-size:30px;font-weight:700;color:#a35a00}
.summary .btn{width:100%}
.mascot-md{width:104px;height:104px}

/* ---------- stickers ---------- */
.st-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.st-head h2{margin:0;flex:1;text-align:center;font-size:clamp(26px,6vw,38px);color:#fff;text-shadow:0 4px 0 #0b3c5d}
.cats{display:flex;gap:8px;overflow-x:auto;padding:2px 2px 10px;flex:none}
.cats .btn{font-size:14px;padding:.35em .9em;border-radius:14px;white-space:nowrap;box-shadow:0 3px 0 var(--edge)}
.st-body{flex:1;min-height:0;padding:12px;display:flex;flex-direction:column;gap:10px}
.progress{height:14px;border-radius:999px;background:#cfe9f5;overflow:hidden;border:2px solid #b3e5fc;flex:none}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,#ffca28,#ff8f00);transition:width .5s}
.st-meta{display:flex;justify-content:space-between;font-weight:700;font-size:14px;color:#546e7a;flex:none}
.st-grid{flex:1;min-height:0;overflow-y:auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(88px,1fr));gap:10px;align-content:start;padding:2px}
.stk{
  border-radius:20px;padding:6px 4px 8px;display:flex;flex-direction:column;align-items:center;gap:2px;
  background:#fff8e1;border:3px solid #ffd54f;transition:transform .15s;
}
.stk:hover{transform:scale(1.05)}
.stk .art{width:62px;height:62px}
.stk b{font-size:13px;color:#37474f}
.stk.locked{background:#e3eaee;border-color:#cfd8dc;opacity:.75}
.stk.locked .lock{width:62px;height:62px;display:flex;align-items:center;justify-content:center;font-size:30px}
.scene{
  position:relative;flex:none;height:128px;border-radius:20px;overflow:hidden;border:3px solid #81d4fa;
  background:linear-gradient(180deg,#e3f6ff 0,#a5dcf5 45%,#2b8fd6 100%);
}
.scene .lbl{position:absolute;top:6px;left:10px;font-weight:700;font-size:12px;color:#0b3c5d;opacity:.8;z-index:2}
.scene .clear{position:absolute;top:4px;right:8px;z-index:2;font-size:12px;font-weight:700;color:#0b3c5d;text-decoration:underline}
.scene .sand{position:absolute;left:0;right:0;bottom:0;height:22px;background:linear-gradient(180deg,#f3d68f,#d9aa5c)}
.scene .empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:#0b3c5d;opacity:.7;padding:0 20px;text-align:center}
.scene-st{position:absolute;width:52px;height:52px;animation:bob 3s ease-in-out infinite;cursor:pointer;filter:drop-shadow(0 3px 3px rgba(0,40,80,.25))}
.scene-st .art{width:100%;height:100%}

/* ---------- modals / settings ---------- */
.modal{position:fixed;inset:0;z-index:50;display:none;align-items:center;justify-content:center;padding:16px;background:rgba(10,30,50,.72);backdrop-filter:blur(6px)}
.modal.open{display:flex}
.card{padding:24px;width:100%;max-width:440px;text-align:center;animation:popIn .35s cubic-bezier(.34,1.56,.64,1) both}
.card h3{margin:0 0 6px;font-size:30px;color:#0b3c5d}
.card p{margin:0 0 16px;font-size:17px;color:#546e7a}
.hold{
  position:relative;width:150px;height:150px;border-radius:50%;overflow:hidden;margin:0 auto;
  background:linear-gradient(180deg,#4dd0e1,#0097a7);border:4px solid #00778a;color:#fff;font-weight:700;font-size:20px;
  box-shadow:0 8px 0 #00778a;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  touch-action:none;
}
.hold i{position:absolute;left:0;right:0;bottom:0;height:0;background:rgba(0,70,90,.55);pointer-events:none}
.hold span{position:relative;z-index:1}
.row{display:flex;justify-content:space-between;align-items:center;gap:12px;background:#fff;border:2px solid #e0edf3;border-radius:18px;padding:12px 14px;margin-bottom:10px;text-align:left}
.row b{display:block;font-size:19px}
.row small{color:#455a64;font-size:14px;font-weight:500}
.switch{appearance:none;-webkit-appearance:none;width:56px;height:32px;border-radius:999px;background:#b0bec5;position:relative;transition:.2s;flex:none;cursor:pointer}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:26px;height:26px;border-radius:50%;background:#fff;transition:.2s;box-shadow:0 2px 4px rgba(0,0,0,.25)}
.switch:checked{background:#43a047}
.switch:checked::after{left:27px}
#toast{
  position:fixed;left:50%;top:calc(12px + var(--safe-t));z-index:70;transform:translate(-50%,-160%);
  transition:transform .4s cubic-bezier(.34,1.56,.64,1);background:#fff;border:3px solid #ffd54f;color:#8a5200;
  border-radius:999px;padding:6px 18px 6px 8px;font-weight:700;font-size:17px;display:flex;align-items:center;gap:8px;
  box-shadow:0 10px 24px rgba(0,0,0,.28);pointer-events:none;white-space:nowrap;
}
#toast.show{transform:translate(-50%,0)}
#toast .art{width:34px;height:34px}

/* ---------- animation ---------- */
@keyframes screenIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes bob{0%,100%{transform:translateY(-7px) rotate(-2deg)}50%{transform:translateY(7px) rotate(2deg)}}
@keyframes breathe{0%,100%{transform:scale(1)}50%{transform:scale(1.05)}}
.breathe{animation:breathe 2.2s ease-in-out infinite}
@keyframes popIn{0%{transform:scale(.4) rotate(-6deg);opacity:0}70%{transform:scale(1.06) rotate(1deg)}100%{transform:none;opacity:1}}
@keyframes pop{0%{transform:scale(1)}40%{transform:scale(1.35)}100%{transform:scale(1)}}
@keyframes waveSlide{from{transform:translateX(-6%)}to{transform:translateX(6%)}}
@keyframes sinkloop{0%{transform:translateY(-34px);opacity:0}15%{opacity:1}80%{transform:translateY(26px);opacity:1}100%{transform:translateY(34px);opacity:0}}
.reduce-motion *,.reduce-motion *::before,.reduce-motion *::after{animation:none!important;transition:none!important}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

/* Learning, progression, and journal */
.modes{gap:10px}.mode{width:min(235px,44vw)}
.mode-art{font-size:42px;line-height:1}
#paneLearn{justify-content:space-between}
.learn-card{padding:8px 14px;text-align:center;overflow:visible}
.learn-card strong{display:block;color:#0b3c5d;font-size:18px}
.learn-card p{margin:3px 0;font-size:14px;line-height:1.25}
.info-body{flex:1;min-height:0;overflow-y:auto;padding:16px;color:#1a2e3b}
.info-body h3{margin:14px 0 8px;color:#0b3c5d}
.info-body>p{margin:4px 0 12px}
.level-list,.journal-list,.achievement-list{display:grid;gap:10px}
.level-card{width:100%;text-align:left;padding:14px;border:2px solid #b3d9ea;border-radius:18px;background:#fff;display:flex;align-items:center;justify-content:space-between;gap:10px}
.level-card:disabled{background:#eef3f5;color:#37474f;cursor:not-allowed}
.level-card strong,.journal-entry strong{display:block;font-size:18px}
.level-card small,.journal-entry small{display:block;color:#546e7a}
.achievement{padding:9px 12px;background:#fff8e1;border:2px solid #ffd54f;border-radius:14px}
.achievement.locked{background:#f1f4f6;border-color:#d4dfe5;color:#37474f}
.journal-entry{padding:9px 12px;background:#fff;border:2px solid #d6edf8;border-radius:14px}
#screen-home .hub{overflow-y:auto;padding:10px 0}
@media(max-height:650px){.mascot-big{width:70px;height:70px}.modes{margin:2px 0}.mode{padding:8px}}

.scene-st{border:0;background:transparent;padding:0}

@media(max-height:720px){
  .hub{gap:4px}
  .mascot-big{width:66px;height:66px}
  .hub .title-sm{font-size:clamp(30px,8vw,42px)}
  .modes{gap:7px;margin:3px 0}
  .mode{padding:7px 6px}
  .mode .mode-art{height:42px}
  .mode .mode-art .art{width:44px;height:44px}
  .mode-name{font-size:19px}
  .mode-desc{font-size:12px}
  .pill-stat{padding:3px 12px;font-size:15px}
  .hub>.btn{font-size:15px;padding:.35em .75em}
}