:root{--sea:#1f6fb2;--sea2:#4fc3d9;--deep:#123f6b;--aqua:#0e8389;--aqua2:#9ee6e6;--pink:#c2447a;--pink2:#ffd6e7;--lav:#7657c4;--lav2:#e7defb;--gold:#f2c94c;--fire:#7657c4;--fire2:#c9b6f2;--leaf:#8fd19e;--cream:#fdfaf5;--ink:#1f2a37;--card:#ffffff;--bad:#c0392b;--good:#1e8449;}
*{box-sizing:border-box}
html,body{margin:0;background:var(--cream);color:var(--ink);font-family:"Nunito",Verdana,sans-serif;font-weight:600;font-size:19px;line-height:1.5}
button{font:inherit;cursor:pointer}
.topbar{position:sticky;top:0;z-index:5;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;align-items:center;padding:10px 14px;background:linear-gradient(90deg,var(--deep),var(--sea) 60%,var(--aqua));color:#fff;box-shadow:0 3px 10px #0002}
.brand{background:none;border:0;color:#fff;font-weight:800;font-size:1.15rem;padding:8px 4px;min-height:48px}
.stats{display:flex;gap:8px;flex-wrap:wrap}
.pill{background:#ffffff26;border-radius:999px;padding:8px 14px;font-weight:700;color:#fff;border:2px solid #ffffff55;min-height:44px;display:inline-flex;align-items:center;gap:4px}
main{max-width:980px;margin:0 auto;padding:18px 14px 80px;outline:none}
h1,h2,h3,.brand,.big,.mode b,.isle .nm{font-family:"Fredoka","Nunito",sans-serif;font-weight:600}
h1,h2,h3{color:var(--deep);line-height:1.2}
h1{font-size:1.9rem;margin:.3em 0}
.card{background:var(--card);border-radius:24px;padding:20px;box-shadow:0 6px 18px #16497315;margin:14px 0;border:3px solid #e9f2fa}
.hero{background:linear-gradient(180deg,#d4f3f5,#efe7fd 70%,#fdfaf5);text-align:center}
.hero svg{max-width:100%;height:auto}
.big{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:60px;padding:14px 26px;border-radius:20px;border:0;font-size:1.15rem;font-weight:800;color:#fff;background:var(--sea);box-shadow:0 5px 0 var(--deep);margin:6px;transition:transform .08s}
.big:active{transform:translateY(4px);box-shadow:0 1px 0 var(--deep)}
.big.orange{background:var(--pink);box-shadow:0 5px 0 #a83f6c}
.big.green{background:var(--aqua);box-shadow:0 5px 0 #0c6b6f}
.big.ghost{background:#fff;color:var(--deep);border:3px solid var(--sea);box-shadow:0 5px 0 #b9d6ea}
.big:disabled{opacity:.45;cursor:not-allowed}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center}
.map{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px;margin-top:10px;position:relative}
.isle{position:relative;border:0;border-radius:50% 50% 42% 42%/55% 55% 45% 45%;min-height:150px;padding:14px 8px;background:radial-gradient(circle at 50% 40%,#fff3dc 0 45%,#8fd19e 46% 62%,#4fc3d9 63%);color:var(--ink);font-weight:800;box-shadow:0 6px 0 #2b7bb955;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.isle .num{background:var(--deep);color:#fff;border-radius:999px;padding:2px 10px;font-size:.85rem}
.isle .em{font-size:2rem}
.isle .nm{font-size:.95rem}
.isle.locked{filter:grayscale(.9);opacity:.6}
.isle.done::after{content:"✨";position:absolute;top:4px;right:10px;font-size:1.6rem;animation:flick 1s infinite alternate}
@keyframes flick{from{transform:scale(1) rotate(-4deg)}to{transform:scale(1.15) rotate(4deg)}}
.progress{height:22px;background:#e3eef7;border-radius:999px;overflow:hidden;margin:8px 0}
.progress>div{height:100%;background:linear-gradient(90deg,var(--sea2),var(--lav),var(--pink));border-radius:999px;transition:width .5s}
.modes{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.mode{border:0;border-radius:24px;padding:22px;color:#fff;text-align:left;min-height:150px;font-size:1.1rem;box-shadow:0 6px 0 #0003}
.mode b{display:block;font-size:1.4rem;margin-bottom:4px}
.mode.l{background:var(--sea)}.mode.p{background:var(--aqua)}.mode.c{background:var(--lav)}
.lesson p,.lesson li{font-size:1.1rem}
.story{background:var(--pink2);border-left:8px solid var(--pink);padding:14px 16px;border-radius:14px}
.ex{background:#eef7ff;border-radius:16px;padding:14px 16px;margin:12px 0;border:2px dashed var(--sea2)}
.ex h3{margin:0 0 6px}
.tip{background:#e3f7f7;border-radius:16px;padding:12px 16px;border:2px solid var(--aqua)}
.q{font-size:1.25rem;font-weight:700}
.opts{display:grid;gap:12px;margin:14px 0}
.opt{display:flex;align-items:center;gap:12px;text-align:left;min-height:62px;padding:12px 16px;border-radius:18px;border:3px solid #cfe3f3;background:#fff;font-size:1.15rem;color:var(--ink)}
.opt .let{flex:none;width:40px;height:40px;border-radius:50%;background:#e3eef7;display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--deep)}
.opt.sel{border-color:var(--sea);background:#eaf5ff}
.opt.right{border-color:var(--good);background:#e6f7ea}
.opt.wrong{border-color:var(--bad);background:#fdecea}
.opt:disabled{cursor:default}
.fb{border-radius:16px;padding:14px 16px;margin:10px 0;font-size:1.1rem}
.fb.good{background:#e6f7ea;border:3px solid var(--good)}
.fb.bad{background:#fdecea;border:3px solid var(--bad)}
.fb.hint{background:var(--lav2);border:3px solid var(--lav)}
.dots{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin:6px 0}
.dots span{width:16px;height:16px;border-radius:50%;background:#dde8f1}
.dots span.on{background:var(--sea)}.dots span.ok{background:var(--good)}.dots span.no{background:var(--bad)}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}
.badge{text-align:center;border-radius:20px;padding:14px;background:#fff;border:3px solid #eee}
.badge .em{font-size:2.6rem}
.badge.off{filter:grayscale(1);opacity:.45}
.nick{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.nick button{min-height:48px;border-radius:999px;border:3px solid var(--sea2);background:#fff;padding:8px 14px;font-weight:700;color:var(--deep)}
.nick button.on{background:var(--lav);color:#fff}
input[type=text]{font:inherit;font-size:1.15rem;padding:12px 14px;border-radius:14px;border:3px solid var(--sea2);min-height:52px;width:min(320px,100%)}
.small{font-size:.9rem;color:#4a5866}
.read{background:#fff;border:2px solid var(--sea2);color:var(--deep);border-radius:999px;padding:6px 14px;min-height:44px;font-weight:700}
.switch{display:flex;align-items:center;gap:10px;justify-content:center;font-weight:700}
.switch input{width:28px;height:28px}
#confetti{position:fixed;inset:0;pointer-events:none;z-index:50;width:100%;height:100%}
.celebrate{text-align:center;animation:pop .5s ease}
@keyframes pop{from{transform:scale(.6);opacity:0}to{transform:scale(1);opacity:1}}
.bob{animation:bob 3s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(-6px) rotate(-2deg)}}
table.review{width:100%;border-collapse:collapse}
@media (max-width:520px){html,body{font-size:17px}.isle{min-height:130px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ---- Map sailboat ---- */
.sea-strip{position:relative;height:70px;border-radius:999px;background:linear-gradient(180deg,#e3f7f7 0 55%,#9ee6e6 55%);overflow:hidden;margin:4px 0 10px}
.drift{position:absolute;bottom:6px;left:0;animation:drift 18s ease-in-out infinite alternate}
.bobber{animation:bob 2.6s ease-in-out infinite}
@keyframes drift{from{transform:translateX(2vw)}to{transform:translateX(min(80vw,860px))}}

/* ---- Celebration overlay ---- */
.cele-overlay{position:fixed;inset:0;z-index:40;display:flex;align-items:center;justify-content:center;background:#123f6b55;animation:fadein .4s ease}
.cele-overlay.out{opacity:0;transition:opacity .5s}
.cele-box{background:linear-gradient(180deg,#fff,#efe7fd);border-radius:28px;padding:26px 30px;text-align:center;box-shadow:0 10px 40px #7657c455;border:4px solid #c9a7f5;animation:pop .6s ease;max-width:90vw}
.cele-box h2{font-size:2rem;margin:.2em 0;color:#7657c4}
.cele-badge{font-size:4.5rem;display:inline-block;border-radius:50%;padding:10px 18px;animation:glow 1.6s ease-in-out infinite}
@keyframes glow{0%,100%{transform:scale(1);box-shadow:0 0 0 0 #f2c94c66}50%{transform:scale(1.1);box-shadow:0 0 28px 10px #ffd6e7}}
@keyframes fadein{from{opacity:0}to{opacity:1}}

/* ---- Sticker sheet ---- */
.sheet{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:22px;padding:24px;border-radius:24px;
  background:radial-gradient(circle,#c9b6f255 1.5px,transparent 2px) 0 0/22px 22px,#fdfaf5;border:3px solid #e7defb}
.sticker,.slot{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:160px;padding:14px 10px;border-radius:28px;text-align:center;color:var(--ink);font:inherit}
.sticker{border:6px solid #fff;background:linear-gradient(145deg,#d4f3f5,#ffd6e7 60%,#e7defb);transform:rotate(var(--tilt));
  box-shadow:0 6px 14px #123f6b33,0 0 0 2px #e7defb;transition:transform .2s}
.sticker::after{content:"";position:absolute;right:-6px;bottom:-6px;width:34px;height:34px;border-radius:0 0 26px 0;
  background:linear-gradient(135deg,transparent 50%,#e7defb 50%,#fff 75%);box-shadow:-2px -2px 4px #123f6b22}
.sticker:hover,.sticker:focus{transform:rotate(0) scale(1.06)}
.sticker-em{font-size:3rem;line-height:1.1}
.sticker b,.slot b{font-family:"Fredoka","Nunito",sans-serif;font-weight:600}
.slot{border:4px dashed #b7c6d6;background:#ffffffaa;color:#5b6b7b}
.slot .sticker-em{width:64px;height:64px;border-radius:50%;background:#dfe7ef;color:#8a9aaa;display:flex;align-items:center;justify-content:center;font-size:2rem}

@media (prefers-reduced-motion:reduce){.drift{left:40%}.cele-overlay,.cele-box{opacity:1}}