@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Nunito:wght@600;700;800;900&display=swap');:root{--navy:#12395b;--blue:#126b91;--teal:#34a9aa;--mint:#e9f7f4;--coral:#f27967;--yellow:#ffd36e;--ink:#183a55;--muted:#536d7c;--paper:#fffdf8}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',sans-serif;line-height:1.65}h1,h2,h3,.brand{font-family:'Nunito',sans-serif;line-height:1.12;color:var(--navy)}h1{font-size:clamp(2.8rem,6vw,5.2rem);letter-spacing:-.045em;margin:.25em 0}h1 em{font-style:normal;color:var(--blue)}h2{font-size:clamp(2rem,3.5vw,3rem);letter-spacing:-.03em;margin:.25em 0 .45em}h3{font-size:1.35rem;margin:.15em 0 .5em}p{color:var(--muted);margin:.3em 0 1em}.wrap{width:min(1160px,calc(100% - 44px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,253,248,.94);backdrop-filter:blur(14px);border-bottom:1px solid #e5efeb}.header-inner{width:min(1240px,calc(100% - 38px));margin:auto;min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:flex;align-items:center;gap:10px;font-weight:900;text-decoration:none;font-size:1.5rem;white-space:nowrap}.brand img{width:42px;height:42px}.brand-blue{color:var(--teal)}.main-nav{display:flex;gap:5px;align-items:center}.main-nav a{font-size:.82rem;color:var(--ink);text-decoration:none;padding:9px 10px;border-radius:20px;white-space:nowrap;font-weight:700}.main-nav a:hover,.main-nav a.active{background:#e7f4f1;color:var(--blue)}.menu-toggle{display:none;border:0;background:var(--navy);color:white;border-radius:12px;padding:10px 14px;font-size:1.15rem}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:10px;top:10px;background:white;padding:12px;z-index:99}.hero{padding:65px 0 75px;display:grid;grid-template-columns:.88fr 1.12fr;align-items:center;gap:32px}.eyebrow{text-transform:uppercase;letter-spacing:.13em;color:var(--teal);font-size:.75rem;font-weight:800}.hero-copy>p,.page-hero p{font-size:1.13rem;max-width:540px}.button-row{display:flex;gap:22px;align-items:center;margin:25px 0}.button{border:0;border-radius:999px;padding:13px 21px;display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;cursor:pointer;font-family:inherit;font-size:.96rem;transition:transform .18s,box-shadow .18s}.button:hover{transform:translateY(-2px);box-shadow:0 8px 20px #12395b22}.button-coral{background:var(--coral);color:#fff}.button-dark{background:var(--navy);color:#fff}.text-link{font-weight:800;color:var(--blue);text-decoration:none}.text-link:hover{text-decoration:underline}.hero-note{font-size:.85rem;color:var(--muted);display:flex;align-items:center;gap:8px}.sun-dot{width:12px;height:12px;border-radius:50%;background:var(--yellow);box-shadow:0 0 0 5px #ffd36e44}.hero-art{position:relative}.hero-art img{width:100%;border-radius:34px;box-shadow:0 20px 45px #0c486629;display:block}.art-sticker{position:absolute;top:20px;left:-18px;background:var(--yellow);border:4px solid var(--paper);padding:11px 17px;border-radius:50%;font-size:.85rem;font-weight:900;transform:rotate(-10deg)}.feature-band{background:var(--mint);padding:68px 0 76px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:28px}.section-head p{max-width:330px}.card-grid,.three-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.adventure-card{padding:27px;border-radius:24px;text-decoration:none;transition:transform .2s;min-height:255px;display:flex;flex-direction:column}.adventure-card:hover{transform:translateY(-5px)}.adventure-card.coral{background:#ffe8df}.adventure-card.aqua{background:#d7f0eb}.adventure-card.yellow{background:#fff1c9}.card-icon{font-size:2rem;margin-bottom:12px}.adventure-card p{color:#4e6875}.arrow{font-weight:800;color:var(--blue);margin-top:auto}.split-section{padding:80px 0;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:60px}.bubble-art{height:300px;border-radius:45% 55% 52% 48%;background:linear-gradient(145deg,#b7e8df,#55b7c1);display:grid;place-items:center;position:relative;overflow:hidden}.bubble{background:#fdf5d2;border-radius:50%;width:185px;height:185px;display:grid;place-content:center;text-align:center;font-weight:900;line-height:1.3;color:var(--blue);box-shadow:0 12px 22px #1c617322}.bubble.small{position:absolute;background:#ffffff77;width:20px;height:20px}.b1{top:45px;left:60px}.b2{right:65px;top:100px;width:32px!important;height:32px!important}.b3{bottom:35px;left:130px}.cta-strip{background:#d9f1ec;padding:45px 0}.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:30px}.cta-inner p{margin-bottom:0}.site-footer{background:#12395b;color:#e8f5f2;padding:45px 0}.footer-inner{width:min(1160px,calc(100% - 44px));margin:auto}.footer-brand{color:white;width:max-content}.footer-brand .brand-blue{color:#8de0d6}.site-footer p,.site-footer small{color:#c5d9df}.footer-links{display:flex;gap:20px;margin:20px 0}.footer-links a{color:white;text-decoration:none}.page-hero{padding:60px 0 50px;display:grid;grid-template-columns:1fr 1fr;gap:45px;align-items:center}.page-hero h1{font-size:clamp(2.6rem,5vw,4.5rem)}.page-hero>img{width:100%;border-radius:28px}.content-section{padding:40px 0 72px}.two-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.info-card{border-radius:24px;background:#f1f8f5;padding:28px}.info-card ul{margin-bottom:0;color:var(--muted)}.fact-ribbon{background:#153f62;color:white;padding:30px 0}.ribbon-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.ribbon-grid>div{display:flex;align-items:center;gap:15px}.ribbon-grid strong{font-family:Nunito;font-size:1.45rem;color:var(--yellow);white-space:nowrap}.ribbon-grid span{font-size:.92rem;color:#dfedf0}.narrow{max-width:760px;font-size:1.08rem;margin-bottom:28px}.depth-illustration{height:310px;background:linear-gradient(#9edce3 0 28%,#5cbec5 28% 53%,#286d91 53% 76%,#153f62 76%);border-radius:28px;position:relative;overflow:hidden}.sunlight{position:absolute;right:35px;top:12px;color:#ffe28e;font-size:3.5rem}.waterline{position:absolute;top:28%;width:100%;height:4px;background:#e3faf5}.depth-label{position:absolute;left:20px;color:#fff;font-size:.68rem;font-weight:900;letter-spacing:.12em}.d1{top:34%}.d2{top:58%}.d3{top:82%}.fish{position:absolute;color:#efffff;font-size:2.4rem;transform:scaleX(1.5)}.f1{top:30%;left:54%}.f2{top:55%;left:72%;font-size:1.7rem}.f3{top:79%;left:48%;font-size:1.3rem}.zone-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.zone-card{padding:27px;border-radius:22px;min-height:300px;color:white}.zone-card p{color:#f1fbfa}.zone-one{background:#48aeb5}.zone-two{background:#286d91}.zone-three{background:#153f62}.zone-number{font-weight:900;color:#ffdf86}.zone-fact{display:inline-block;margin-top:12px;border:1px solid #ffffff77;border-radius:99px;padding:5px 10px;font-size:.8rem}.fact-poster{background:linear-gradient(155deg,#bce9df,#64c3c2);border-radius:40% 60% 45% 55%;height:280px;display:grid;place-items:center;position:relative;overflow:hidden}.fact-poster>span{font-weight:900;font-size:1.35rem;text-align:center;color:var(--navy);letter-spacing:.1em}.orbit{position:absolute;font-size:3.5rem;right:35px;bottom:30px}.sound-art{height:280px;border-radius:50%;background:#d5f0ec;display:grid;place-items:center;position:relative}.sound-whale{font-size:5rem;z-index:2}.sound-ring{position:absolute;width:90px;height:90px;border:2px solid #36a6ac;border-radius:50%;animation:pulse 2s infinite}.r2{width:160px;height:160px;animation-delay:.4s}.r3{width:230px;height:230px;animation-delay:.8s}@keyframes pulse{0%{transform:scale(.85);opacity:.7}100%{transform:scale(1.15);opacity:0}}.media-panel{background:#f0f8f5;padding:35px;border-radius:28px;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:30px}.small-note{font-size:.84rem}.sound-bars{height:130px;display:flex;align-items:center;justify-content:center;gap:8px}.sound-bars i{width:10px;height:25%;background:var(--teal);border-radius:9px}.sound-bars.playing i{animation:wave .6s infinite alternate}.sound-bars.playing i:nth-child(2n){animation-delay:.25s}.sound-bars.playing i:nth-child(3n){animation-delay:.4s}@keyframes wave{to{height:95%}}.game-doodle{font-size:7rem;background:#d9f1ec;border-radius:50%;width:260px;height:260px;display:grid;place-items:center;position:relative}.game-doodle span{position:absolute;right:20px;top:18px;background:var(--yellow);border-radius:50%;font-size:2rem;width:55px;height:55px;display:grid;place-items:center}.quiz-box{max-width:760px;margin:auto;background:#f1f8f5;border-radius:28px;padding:35px}.quiz-top{display:flex;align-items:center;justify-content:space-between;gap:15px}.quiz-progress{height:9px;width:48%;background:#d5e7e2;border-radius:8px;overflow:hidden}.quiz-progress i{display:block;width:33%;height:100%;background:var(--teal);transition:width .2s}.answer-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0}.answer-option{background:white;border:2px solid transparent;border-radius:15px;padding:15px;text-align:left;font:inherit;font-weight:700;color:var(--ink);cursor:pointer}.answer-option:hover,.answer-option.selected{border-color:var(--teal)}.answer-option.correct{background:#d5f1df;border-color:#51a873}.answer-option.wrong{background:#ffe5de;border-color:var(--coral)}.quiz-feedback{min-height:30px;font-weight:700}.quiz-feedback.good{color:#27804f}.quiz-feedback.bad{color:#bb5448}.button:disabled{opacity:.5;cursor:not-allowed}.activity-callout{display:flex;justify-content:space-between;align-items:center;background:#fff1c9;border-radius:25px;padding:28px;gap:20px}.activity-callout p{max-width:690px}.ripple-art{height:270px;display:grid;place-items:center;position:relative}.ripple-art span{font-size:4rem;color:var(--coral);z-index:2}.ripple-art i{position:absolute;border:2px solid #50b4ba;border-radius:50%;width:100px;height:100px;animation:ripple 3s infinite}.ripple-art i:nth-of-type(2){width:170px;height:170px;animation-delay:.7s}.ripple-art i:nth-of-type(3){width:245px;height:245px;animation-delay:1.4s}@keyframes ripple{0%{transform:scale(.8);opacity:0}40%{opacity:.8}100%{transform:scale(1.1);opacity:0}}.tip-list{max-width:900px}.tip-list article{display:grid;grid-template-columns:65px 1fr;gap:18px;padding:20px 0;border-bottom:1px solid #dce9e5}.tip-list article>b{font-family:Nunito;font-size:1.4rem;color:var(--teal)}.tip-list h3{margin:0}.tip-list p{margin:.3em 0 0}.parent-art{height:280px;border-radius:30px;background:#fff0c9;display:flex;align-items:center;justify-content:center;gap:11px;flex-wrap:wrap;padding:30px}.parent-art span{background:white;border-radius:50%;width:92px;height:92px;display:grid;place-items:center;color:var(--blue);font-weight:900;box-shadow:0 5px 18px #12466a12}.parent-art span:last-child{font-size:2rem;background:transparent;box-shadow:none}.about-art{height:280px;background:#d9f1ec;border-radius:40% 60% 48% 52%;display:grid;place-items:center;position:relative;font-size:6rem}.about-art span{position:absolute;left:8%;top:15%;font-size:1rem;letter-spacing:.08em;font-weight:900;color:var(--blue);transform:rotate(-9deg)}.about-note{border-top:1px solid #e3efeb}.about-note p{max-width:850px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:1080px){.main-nav a{font-size:.75rem;padding:8px 7px}.header-inner{gap:10px}.brand{font-size:1.3rem}}@media(max-width:850px){.menu-toggle{display:block}.main-nav{display:none;position:absolute;top:81px;left:0;right:0;background:var(--paper);padding:12px 20px 20px;box-shadow:0 12px 18px #12395b12;flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.main-nav a{font-size:.95rem}.hero,.page-hero{grid-template-columns:1fr}.hero{padding-top:42px}.hero-art{max-width:720px}.page-hero{gap:20px}.page-hero>img,.depth-illustration,.sound-art,.game-doodle,.parent-art,.about-art{max-width:650px;width:100%}.hero-art .art-sticker{left:5px}.split-section{gap:32px}.ribbon-grid{gap:12px}.ribbon-grid>div{display:block}.zone-grid{grid-template-columns:1fr}.zone-card{min-height:220px}}@media(max-width:620px){.wrap{width:calc(100% - 32px)}.header-inner{min-height:72px;width:calc(100% - 28px)}.main-nav{top:71px}.brand img{width:38px;height:38px}.brand{font-size:1.25rem}.hero{padding:35px 0 50px}.feature-band{padding:48px 0}.card-grid,.three-cards,.two-cards{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:6px}.adventure-card{min-height:215px}.split-section{grid-template-columns:1fr;padding:55px 0}.bubble-art{height:245px}.cta-inner,.activity-callout{align-items:flex-start;flex-direction:column}.page-hero{padding:42px 0 25px}.content-section{padding:28px 0 55px}.ribbon-grid{grid-template-columns:1fr}.ribbon-grid>div{display:flex}.media-panel{grid-template-columns:1fr;padding:25px}.answer-list{grid-template-columns:1fr}.quiz-box{padding:24px}.quiz-progress{width:35%}.tip-list article{grid-template-columns:42px 1fr}.footer-links{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media print{.site-header,.site-footer,.button,.button-row,.activity-callout button{display:none!important}body{background:white}.activity-callout{background:white}.wrap{width:100%}}