@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{--bg:#071d28;--panel:#0d2a35;--line:#27434a;--text:#f0f4df;--muted:#99b8b5;--lime:#d5f38a;--coral:#ff9076;--cyan:#83d3d7}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:'DM Sans',system-ui,sans-serif;line-height:1.65}h1,h2,h3,.brand,.depth{font-family:'Space Grotesk',system-ui,sans-serif;letter-spacing:-.04em;line-height:1.15}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button,a,input,summary{outline-offset:5px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--lime)}button{cursor:pointer}nav a:hover,footer a:hover{color:var(--lime)}.shell{max-width:1220px;margin:auto;padding:0 30px}.site-nav{height:104px;display:flex;align-items:center;justify-content:space-between;gap:25px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:11px;align-items:center;font-size:22px;font-weight:700;letter-spacing:.02em}.brand svg{width:31px;height:37px}.brand span{font-size:10px;display:block;letter-spacing:.25em;color:var(--muted);margin-top:3px}.nav-links{display:flex;gap:28px;font-size:13px}.nav-links [aria-current=page]{color:var(--lime)}.nav-play{border:1px solid #6e8e7b;border-radius:30px;padding:9px 18px;font-size:12px}.hero{padding:56px 0 34px;display:flex;align-items:end;justify-content:space-between;gap:45px}.eyebrow{font-size:10px;letter-spacing:.18em;text-transform:uppercase;font-weight:700;color:var(--cyan);margin:0 0 18px}.eyebrow:before{content:'';display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--lime);margin-right:9px}.hero h1{font-size:clamp(35px,4.7vw,59px);font-weight:600;margin:0}.hero h1 em{font-style:normal;color:var(--lime)}.hero-copy{max-width:360px;font-size:14px;color:var(--muted);margin:0 0 5px}.mode-switch{display:flex;gap:5px;padding:5px;background:#102e39;border:1px solid var(--line);border-radius:40px;width:max-content;margin:7px 0 22px}.mode-switch a{font-size:12px;padding:9px 22px;border-radius:30px}.mode-switch [aria-current=page]{background:var(--lime);color:#173727;font-weight:700}.game-layout{display:grid;grid-template-columns:1fr .85fr;border:1px solid #38565a;border-radius:24px;overflow:hidden;min-height:520px;box-shadow:0 25px 70px #0002}.game-board{padding:30px 36px;background:#f6f5e9;color:#153b3d;min-width:0}.board-top{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:10px;text-transform:uppercase;letter-spacing:.06em;color:#5d7b73}.board-top button{background:none;border:0;color:#56756c;font-size:11px;padding:0}.round-progress{display:block;width:100%;height:4px;border:0;border-radius:5px;margin:17px 0 33px;accent-color:#2d7773}.round-progress::-webkit-progress-bar{background:#dce5d6}.round-progress::-webkit-progress-value{background:#2d7773}.game-pane h2{font-size:31px;font-weight:600;margin:0 0 20px;line-height:1.22}.game-pane>.eyebrow{color:#488c86}.game-pane>.eyebrow:before{background:#569b78}.muted{font-size:14px;color:#628078;line-height:1.85}.fine{font-size:11px;color:#6c8276;line-height:1.8;margin-top:20px}.primary,.secondary{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:11px;background:#124e49;color:#fbf9e8;padding:14px 23px;font-size:13px;font-weight:700;margin-top:19px;gap:10px;min-height:49px}.primary:hover{background:#21655b}.secondary{background:#dfebd4;color:#254c3b;margin-left:10px}.text-button{background:transparent;border:0;color:#5c786c;font-size:12px}.game-actions{display:flex;gap:23px;align-items:center}.game-pane label{display:block;font-size:12px;font-weight:700;margin:21px 0 8px}.game-pane input,.game-pane textarea{width:100%;border:1px solid #afc5b4;border-radius:10px;padding:13px 15px;color:#153b3d;background:#fffef6;min-width:0}.game-pane input:focus{outline:2px solid #65a493;outline-offset:1px}.timer-line{display:flex;justify-content:space-between;font-size:11px;color:#658174;margin-top:25px}.timer-line strong{font-size:16px;color:#194b45}#timer{width:100%;display:block;height:6px;margin:10px 0 20px;accent-color:#478a78}.error{font-size:12px;color:#9b4734;line-height:1.75}.ocean-scene{position:relative;background:radial-gradient(ellipse at 50% 5%,#21696d 0,#0e414c 45%,#092c3d 100%);overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;min-height:520px;padding:28px 32px}.scene-heading{display:flex;justify-content:space-between;font-size:10px;text-transform:uppercase;letter-spacing:.14em;color:#b5d2c8;z-index:1}.depth{font-size:40px;letter-spacing:-.04em;color:#ecf5db}.scene-score{display:flex;align-items:end;justify-content:space-between;position:relative;z-index:1}.scene-score p{font-size:10px;color:#9fc0b9;text-transform:uppercase;letter-spacing:.13em;margin-bottom:4px}.scene-score span{font-size:13px;color:var(--lime)}.ocean-art{position:absolute;width:100%;height:100%;inset:0}.game-meta{display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:11px;color:#8baea8;padding:17px 3px}.meta-tags{display:flex;gap:22px}.meta-tags b{color:#dce9cd;font-weight:500}.score-earned{font:600 25px 'Space Grotesk',sans-serif;color:#287e60;margin:15px 0}.recognized{font-size:21px;color:#28594b;margin:0}.answer-list{list-style:none;padding:0;max-height:200px;overflow:auto;margin:12px 0}.answer-list li,.recap li{display:flex;justify-content:space-between;gap:20px;font-size:12px;padding:8px 0;border-bottom:1px solid #dbe4d3}.answer-list strong,.recap strong{white-space:nowrap}.game-pane details{font-size:12px;color:#59796c;margin:18px 0}.game-pane details a{text-decoration:underline}.recap{list-style:none;padding:0}.recap span{overflow-wrap:anywhere}.info-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr);margin:32px 0 55px}.info-strip article{padding:24px 28px 24px 0}.info-strip article+article{padding-left:28px;border-left:1px solid var(--line)}.info-strip h2{font-size:18px;letter-spacing:-.02em;margin:8px 0 10px}.info-strip p{font-size:12px;color:var(--muted);margin:0}.small-number{font-size:10px;letter-spacing:.1em;color:var(--lime)}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:25px}.section-heading h2{font-size:31px;margin:0}.section-heading p{font-size:13px;color:var(--muted);max-width:430px;margin:0}.tier-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-bottom:45px}.tier{border:1px solid var(--line);border-radius:13px;padding:18px 12px;background:#0c2732}.tier svg{width:31px;height:31px;color:var(--cyan)}.tier small{display:block;color:var(--muted);font-size:10px;margin-top:10px}.tier strong{font-family:'Space Grotesk',sans-serif;font-size:25px;color:var(--lime)}.tier span{display:block;font-size:11px;font-weight:600;margin-top:7px}.editorial-note{font-size:12px;color:var(--muted);max-width:850px;margin-top:-23px;margin-bottom:50px;line-height:1.9}.guides-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:60px}.guide-card{border:1px solid var(--line);border-radius:16px;padding:25px;background:#0d2934;display:flex;flex-direction:column}.guide-card h3{font-size:22px;margin:12px 0}.guide-card p{font-size:13px;color:var(--muted)}.guide-card a{margin-top:auto;padding-top:16px;font-size:12px;color:var(--lime)}.page-intro{padding:55px 0 40px;max-width:850px}.page-intro h1{font-size:clamp(35px,4.5vw,53px);margin:12px 0 23px}.page-intro p{font-size:16px;color:var(--muted);line-height:1.95}.breadcrumbs{font-size:11px;color:#789c95;margin-top:24px}.breadcrumbs a{text-decoration:underline}.article{max-width:830px;padding-bottom:60px}.article h2{font-size:27px;margin:34px 0 15px}.article h3{font-size:20px;margin:28px 0 12px}.article p,.article li{font-size:15px;line-height:1.95;color:#b0c7be}.article a{color:var(--lime);text-decoration:underline}.article blockquote{border-left:3px solid var(--lime);margin:25px 0;padding:15px 25px;background:#0e303a;color:#d1dfc5}.article table{width:100%;border-collapse:collapse;font-size:13px}.article td,.article th{text-align:left;border-bottom:1px solid var(--line);padding:12px 8px}.faq{margin-bottom:60px}.faq h2{font-size:31px}.faq details{border-bottom:1px solid var(--line);padding:20px 0}.faq summary{cursor:pointer;font-size:15px;color:#dfe9d4}.faq p{font-size:13px;color:var(--muted);max-width:850px;line-height:1.95}.site-footer{border-top:1px solid var(--line);padding:30px 0 35px;margin-top:15px}.footer-row{display:flex;justify-content:space-between;align-items:center;gap:30px}.footer-links{display:flex;gap:22px;font-size:12px}.site-footer p{font-size:10px;color:#77978e;max-width:800px;line-height:1.9;margin-top:20px}.status-note{font-size:12px;color:var(--coral)}[hidden]{display:none!important}@media(max-width:850px){.hero{align-items:start;flex-direction:column;gap:22px}.hero-copy{max-width:600px}.hero{padding-top:35px}.tier-grid{grid-template-columns:repeat(3,1fr)}.game-board{padding:27px}.ocean-scene{padding:26px;min-height:500px}.game-layout{grid-template-columns:1fr .7fr}.nav-links{gap:18px;font-size:12px}.guides-grid{grid-template-columns:1fr 1fr}.guide-card:last-child{grid-column:1/-1}}@media(max-width:620px){.shell{padding:0 19px}.site-nav{height:80px;gap:15px}.brand{font-size:18px}.brand span{font-size:8px}.brand svg{width:26px}.nav-links a:nth-child(n+3){display:none}.nav-links{gap:14px;font-size:11px}.nav-play{display:none}.hero{padding:28px 0 24px}.hero h1{font-size:37px}.hero-copy{font-size:13px}.game-layout{grid-template-columns:1fr}.game-board{padding:24px 22px;min-height:410px}.game-pane h2{font-size:28px}.ocean-scene{min-height:250px}.ocean-art{height:140%;top:-20%}.scene-heading{font-size:9px}.depth{font-size:31px}.mode-switch{margin-bottom:18px}.game-meta{align-items:start;flex-direction:column;gap:8px}.meta-tags{gap:15px;flex-wrap:wrap}.info-strip{grid-template-columns:1fr;margin:24px 0 40px}.info-strip article,.info-strip article+article{padding:20px 0;border-left:0;border-bottom:1px solid var(--line)}.info-strip article:last-child{border-bottom:0}.section-heading{align-items:start;flex-direction:column;gap:14px}.section-heading h2{font-size:28px}.tier-grid{grid-template-columns:repeat(2,1fr)}.guides-grid{grid-template-columns:1fr}.guide-card:last-child{grid-column:auto}.footer-row{align-items:start;flex-direction:column;gap:22px}.footer-links{flex-wrap:wrap;gap:13px 20px}.secondary{margin-left:0}.game-actions .primary{padding:13px 18px}.page-intro{padding:35px 0 20px}.page-intro h1{font-size:36px}.page-intro p{font-size:14px}.article{padding-bottom:35px}.article p,.article li{font-size:14px}.article table{font-size:11px}.article td,.article th{padding:10px 5px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}.player-wrap{border:1px solid var(--line);border-radius:22px;overflow:hidden;background:var(--bg)}.player-toolbar{display:flex;justify-content:space-between;align-items:center;padding:13px 20px;background:var(--panel);font-size:12px;gap:12px}.player-toolbar div{display:flex;align-items:center;gap:20px}.player-toolbar button,.local-tools button{background:transparent;border:1px solid #4d726b;color:var(--text);padding:7px 12px;border-radius:8px}.player-wrap iframe{display:block;border:0;width:100%;height:700px;background:var(--bg)}.player-wrap:fullscreen{overflow:auto;padding:12px;background:var(--bg)}.player-body{padding:16px}.player-main{max-width:1400px;margin:auto}.player-body .mode-switch{display:none}.player-body .game-meta{margin-bottom:0}.player-body .game-layout{box-shadow:none}.local-tools{display:flex;justify-content:flex-end;gap:12px;margin-bottom:12px;font-size:12px}.player-body #challengeStatus:empty{display:none}.player-body dialog{border:1px solid #567c70;border-radius:20px;background:#f6f5e9;color:#153b3d;max-width:480px;width:90%;padding:28px}.player-body dialog::backdrop{background:#071d28cc}@media(max-width:620px){.player-body{padding:8px}.player-toolbar{padding:12px;align-items:flex-start;flex-direction:column}.player-toolbar div{gap:16px}.local-tools{justify-content:flex-start;flex-wrap:wrap}.player-body .ocean-scene{min-height:180px}.player-body .game-board{padding:20px 18px}}

.player-body .game-meta{display:none}

.contact-form{max-width:720px;margin:26px 0}.contact-form label{display:block;margin:20px 0 8px;color:var(--text);font-size:14px}.contact-form input,.contact-form textarea{width:100%;display:block;padding:13px 15px;border:1px solid #55776c;border-radius:10px;background:var(--panel);color:var(--text);font:inherit}.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--lime);outline-offset:2px}.contact-form .fine{color:var(--muted)}#contactStatus{color:var(--lime)}
/* Original immersive ocean player */
.immersive-game{position:relative;display:block;min-height:720px;padding:22px 26px 28px;isolation:isolate;background:#05131f;border-color:#386d78;border-radius:14px;--dive-progress:0}.immersive-game:after{content:'';position:absolute;inset:0;z-index:4;pointer-events:none;opacity:.13;background:repeating-linear-gradient(0deg,transparent 0 3px,#05111e 3px 4px)}.immersive-game .game-board{position:relative;z-index:3;background:transparent;color:#eff6df;padding:0;display:flex;flex-direction:column;min-height:666px}.immersive-game .board-top{color:#b3dfd9;font:11px ui-monospace,monospace}.immersive-game .board-top button{color:#d5f38a}.immersive-game .round-progress{margin:14px 0;height:3px;accent-color:#70d4cb}.immersive-game .round-progress::-webkit-progress-bar{background:#173744}.immersive-game .round-progress::-webkit-progress-value{background:#83d3d7}.immersive-game .ocean-scene{position:absolute;inset:0;z-index:0;min-height:0;padding:20px 25px;background:radial-gradient(ellipse at 50% -5%,#155363 0,#092537 52%,#030b17 100%);pointer-events:none}.immersive-game .ocean-art{top:0;height:100%;opacity:.68;transform:translateY(calc(var(--dive-progress)*55px));transition:transform 1s ease}.immersive-game .scene-heading{display:none}.immersive-game .scene-score{position:absolute;left:24px;right:24px;top:85px;align-items:start}.immersive-game .scene-score p{font:10px ui-monospace,monospace;letter-spacing:.18em}.immersive-game .scene-score .depth{font:700 30px ui-monospace,monospace;color:#a8eee0}.immersive-game .scene-score>span{padding:7px 12px;border:1px solid #55837380;border-radius:4px;font:12px ui-monospace,monospace}.dive-title{position:absolute;top:130px;left:0;right:0;text-align:center;z-index:1;pointer-events:none}.dive-title>span{display:block;font:900 clamp(48px,7vw,84px)/1 ui-monospace,'Courier New',monospace;letter-spacing:.1em;color:#edf7cf;text-shadow:4px 3px #56cbd4,-3px -1px #d95a88,8px 7px #031b2d}.dive-title small{display:block;font:700 13px ui-monospace,monospace;letter-spacing:.35em;color:#83d3d7;margin-top:18px}.dive-title i{display:block;font:10px ui-monospace,monospace;letter-spacing:.19em;color:#91b2bc;margin-top:12px;font-style:normal}.immersive-game .game-pane{width:min(100%,700px);margin:auto auto 0;background:#071c2ae8;border:1px solid #365c68;border-radius:10px;padding:24px 27px;box-shadow:0 10px 30px #0004;backdrop-filter:blur(7px)}.immersive-game .game-pane h2{font-size:26px;color:#f0f5dc}.immersive-game .muted{color:#a2c4c4;font-size:13px;line-height:1.8}.immersive-game .fine{color:#8eb7b5}.immersive-game .primary{background:#d5f38a;color:#163a34;border:2px solid #d5f38a;border-radius:4px;box-shadow:4px 4px 0 #2b665d;font:700 14px ui-monospace,monospace;letter-spacing:.04em;min-height:50px}.immersive-game .primary:hover{background:#e8ffa9;transform:translateY(-1px)}.immersive-game .secondary{color:#ccead3;background:#173e48}.immersive-game .text-button{color:#b8d9d5}.immersive-game input,.immersive-game textarea{background:#092534;color:#f4f7dd;border-color:#5a938c;border-radius:5px;font:16px ui-monospace,monospace}.immersive-game label{color:#bbddd8}.immersive-game .timer-line{color:#9cc6c5}.immersive-game .timer-line strong{color:#d5f38a}.immersive-game #timer{accent-color:#d5f38a}.immersive-game .error{color:#ffc4a8}.immersive-game .recognized{color:#c8f3ae}.immersive-game .score-earned{color:#d5f38a;font-family:ui-monospace,monospace}.immersive-game details{color:#a5d2c9}.immersive-game .answer-list li,.immersive-game .recap li{border-color:#305260}.immersive-game .answer-list strong,.immersive-game .recap strong{color:#d5f38a}.immersive-game[data-phase=answering] .dive-title,.immersive-game[data-phase=feedback] .dive-title,.immersive-game[data-phase=finished] .dive-title{top:165px;opacity:.22;transform:scale(.75)}.immersive-game[data-phase=finished] .game-pane{margin-top:80px}.ocean-particles{position:absolute;inset:0;overflow:hidden;z-index:1;pointer-events:none}.ocean-particles i{position:absolute;width:5px;height:5px;background:#80d9d8;opacity:.35;left:12%;top:90%;border-radius:50%;animation:bubble-rise 13s linear infinite}.ocean-particles i:nth-child(2){left:28%;animation-delay:-7s;animation-duration:17s}.ocean-particles i:nth-child(3){left:46%;animation-delay:-3s;width:3px;height:3px}.ocean-particles i:nth-child(4){left:67%;animation-delay:-11s}.ocean-particles i:nth-child(5){left:83%;animation-delay:-4s;animation-duration:19s}.ocean-particles i:nth-child(6){left:94%;animation-delay:-9s;width:3px;height:3px}@keyframes bubble-rise{from{transform:translate(0,50px)}to{transform:translate(35px,-750px)}}.hero{padding:28px 0 22px;display:block}.hero h1{font-size:clamp(28px,3.4vw,43px)}.hero-copy{max-width:850px;margin-top:15px;font-size:14px}.hero .eyebrow{margin-bottom:12px}.player-wrap iframe{height:760px}.player-body{background:#05131f;padding:10px}.player-main{max-width:1500px}.player-body .local-tools{margin-bottom:8px}.player-body .game-meta{display:none}.player-body .immersive-game{border-radius:8px}.game-pane .eyebrow{margin-bottom:10px}.immersive-game .game-pane>.eyebrow{color:#83d3d7}@media(max-width:620px){.immersive-game{padding:17px 15px 20px;min-height:720px}.immersive-game .game-board{min-height:680px}.immersive-game .scene-score{left:18px;right:18px;top:85px}.immersive-game .scene-score .depth{font-size:24px}.dive-title{top:165px}.dive-title>span{font-size:43px;letter-spacing:.05em;text-shadow:2px 2px #56cbd4,-2px -1px #d95a88}.dive-title small{font-size:10px;letter-spacing:.2em}.dive-title i{font-size:8px;letter-spacing:.1em}.immersive-game .game-pane{padding:19px 17px}.immersive-game .game-pane h2{font-size:23px}.immersive-game .game-pane .fine{font-size:10px}.player-body{padding:6px}.player-toolbar{flex-direction:row;align-items:center}.player-toolbar div{gap:10px}.player-toolbar div a{display:none}.hero-copy{font-size:13px}.hero .eyebrow{font-size:9px}.hero{padding:22px 0 12px}.immersive-game[data-phase=finished] .game-pane{margin-top:110px}}@media(prefers-reduced-motion:reduce){.ocean-particles i{animation:none}.immersive-game .ocean-art{transition:none}.immersive-game .primary:hover{transform:none}}
.answer-intro,.walkthrough-section,.score-reference,.sources-section{margin:45px 0 60px}.answer-intro h2,.score-reference h2,.sources-section h2{font-size:30px}.answer-intro p,.score-reference p,.sources-section p{max-width:900px;color:var(--muted);font-size:14px;line-height:1.9}.answer-intro strong,.score-reference strong{color:#dcebd2}.answer-intro a,.score-reference a,.sources-section a,.video-layout a{color:var(--lime);text-decoration:underline}.play-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding-left:22px;color:var(--muted);font-size:13px;line-height:1.85;margin:25px 0}.play-steps strong{color:#edf3dc;display:block}.screenshot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:30px 0}.screenshot-grid figure{margin:0}.screenshot-grid img{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:10px}.screenshot-grid figcaption{font-size:12px;color:var(--muted);padding:12px 0;line-height:1.8}.video-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:35px;align-items:center;border:1px solid var(--line);background:var(--panel);border-radius:16px;padding:24px;margin-top:20px}.video-layout h3{font-size:25px;margin-top:0}.video-layout p{font-size:13px;color:var(--muted)}.video-layout video{display:block;width:100%;aspect-ratio:6/5;object-fit:contain;background:#04111c;border-radius:8px}.table-scroll{overflow:auto;max-width:800px}.score-reference table{width:100%;border-collapse:collapse;font-size:13px}.score-reference td,.score-reference th{text-align:left;padding:12px 15px;border-bottom:1px solid var(--line)}.score-reference th{color:var(--lime);background:var(--panel)}.content-byline{font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding-top:20px;margin:35px 0}.content-byline a{color:var(--lime)}.site-nav .brand{font-size:19px}@media(max-width:760px){.play-steps{grid-template-columns:1fr 1fr;gap:20px}.video-layout{grid-template-columns:1fr;padding:18px;gap:14px}.screenshot-grid{gap:12px}.screenshot-grid figcaption{font-size:11px}}@media(max-width:480px){.play-steps{grid-template-columns:1fr}.screenshot-grid{grid-template-columns:1fr}.screenshot-grid img{max-height:310px;object-fit:cover;object-position:bottom}.answer-intro h2,.score-reference h2,.sources-section h2{font-size:26px}.site-nav .brand{font-size:16px}}
@media(min-width:621px){.site-nav{height:88px}.hero{padding:20px 0 14px}.hero h1{font-size:38px}.hero-copy{max-width:none;margin-top:11px;font-size:13px}.mode-switch{margin:4px 0 14px}.mode-switch a{padding:7px 20px}}
/* Continuous original dive scene: the character and world react to actual earned depth. */
.living-ocean{position:absolute;inset:0;overflow:hidden;z-index:1;pointer-events:none;background:linear-gradient(180deg,#2a99b83b,#08223700 40%,#02091488)}
.surface-light{position:absolute;inset:0 0 auto;height:16%;background:linear-gradient(#b9f4ee80,#80d8e80d);clip-path:polygon(0 0,100% 0,100% 85%,78% 92%,55% 84%,30% 96%,0 86%);transform:translateY(calc(var(--dive-progress)*-180px));transition:opacity .7s}
.diver-track{position:absolute;left:12%;top:calc(19% + var(--dive-progress)*53%);width:110px;transform:rotate(calc(var(--dive-progress)*8deg));filter:drop-shadow(0 0 18px #83d3d744)}
.dive-craft{position:relative;animation:craft-bob 3.5s ease-in-out infinite}.dive-craft svg{display:block;width:100%;height:auto}.craft-wake{position:absolute;top:35%;left:0}.craft-wake i{position:absolute;width:8px;height:8px;border:1px solid #a8ece7;border-radius:50%;animation:craft-wake 2s linear infinite}.craft-wake i:nth-child(2){animation-delay:-.6s;width:5px;height:5px}.craft-wake i:nth-child(3){animation-delay:-1.3s}
.depth-ruler{position:absolute;right:18px;top:8%;bottom:5%;width:60px;border-right:2px solid #9cd9e044;display:flex;flex-direction:column;justify-content:space-between;color:#9ed2de99;font:9px ui-monospace,monospace;text-align:right}.depth-ruler span:after{content:'—';margin-left:6px}
.swimming-fish{position:absolute;inset:0;transform:translateY(calc(var(--dive-progress)*-90px))}.swimming-fish i{position:absolute;left:-10%;top:25%;width:25px;height:11px;border-radius:60%;background:#041827;animation:fish-swim 24s linear infinite}.swimming-fish i:after{content:'';position:absolute;left:-7px;top:1px;border-top:5px solid transparent;border-bottom:5px solid transparent;border-left:8px solid #041827}.swimming-fish i:nth-child(2){top:39%;animation-delay:-8s;animation-duration:29s}.swimming-fish i:nth-child(3){top:72%;animation-delay:-16s}.swimming-fish i:nth-child(4){top:86%;animation-delay:-4s;animation-duration:35s}.swimming-fish i:nth-child(5){top:60%;animation-delay:-11s;animation-duration:31s}.swimming-fish i:nth-child(6){top:32%;animation-delay:-19s}.swimming-fish i:nth-child(7){top:80%;animation-delay:-23s;animation-duration:32s}.swimming-fish i:nth-child(8){top:49%;animation-delay:-6s;animation-duration:27s}
.ocean-reef{position:absolute;bottom:-7%;left:0;right:0;height:18%;background:#020f21;opacity:.6;clip-path:polygon(0 80%,3% 78%,3% 32%,5% 32%,5% 62%,7% 62%,7% 22%,9% 22%,9% 72%,14% 80%,25% 90%,65% 100%,86% 83%,89% 50%,91% 50%,91% 20%,93% 20%,93% 67%,95% 67%,95% 42%,97% 42%,97% 75%,100% 70%,100% 100%,0 100%);transform:translateY(calc(var(--dive-progress)*-28px))}
.immersive-game .ocean-art>g[transform]{display:none}.immersive-game .game-pane{transition:border-color .25s,box-shadow .25s}.immersive-game[data-phase=answering] .game-pane{animation:prompt-arrival .35s ease-out}.immersive-game[data-phase=feedback] .game-pane{animation:result-arrival .65s ease-out;border-color:#91d4bb}.immersive-game[data-phase=feedback][data-outcome=scored] .score-earned{animation:score-pop .75s ease-out;color:#d5f38a}.immersive-game[data-phase=feedback] .recognized{font-size:29px;line-height:1.3}.immersive-game[data-urgency=warning] .timer-line strong{color:#ffd782}.immersive-game[data-urgency=critical] .timer-line strong{color:#ff8291;font-size:22px}.immersive-game[data-urgency=critical] #answer{border:2px solid #ff8291;animation:time-warning 1s ease-in-out infinite}.immersive-game[data-urgency=critical] #timer{accent-color:#ff8291}.immersive-game[data-urgency=critical] .timer-line:before{content:'LAST SECONDS';font:700 11px ui-monospace,monospace;color:#ff9da8;margin-right:12px}.immersive-game[data-urgency=critical] .game-pane{border-color:#ff8291}.immersive-game[data-phase=feedback] .dive-craft{animation:craft-dive 1.4s ease-out,craft-bob 3.5s 1.4s ease-in-out infinite}
@keyframes craft-bob{50%{transform:translateY(-7px) rotate(-3deg)}}@keyframes craft-wake{from{transform:translate(0,0);opacity:.7}to{transform:translate(-60px,-35px);opacity:0}}@keyframes fish-swim{to{left:110%}}@keyframes craft-dive{0%{transform:rotate(0)}35%{transform:rotate(18deg) translateY(12px)}100%{transform:rotate(0)}}@keyframes prompt-arrival{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes result-arrival{from{opacity:.2;transform:translateY(-10px) scale(.97)}to{opacity:1;transform:none}}@keyframes score-pop{0%{transform:scale(.8);opacity:0}55%{transform:scale(1.08)}100%{transform:scale(1);opacity:1}}@keyframes time-warning{50%{box-shadow:0 0 0 4px #ff829126,0 0 20px #ff829144;border-color:#ffc0b8}}
@media(max-width:620px){.diver-track{left:6%;width:76px}.depth-ruler{right:9px;width:46px;font-size:8px}.immersive-game .game-pane{position:relative}.immersive-game[data-phase=feedback] .recognized{font-size:25px}}
@media(prefers-reduced-motion:reduce){.dive-craft,.craft-wake i,.swimming-fish i,.immersive-game .game-pane,.immersive-game .score-earned,.immersive-game #answer{animation:none!important}.surface-light,.immersive-game .game-pane{transition:none}.swimming-fish i:nth-child(1){left:12%}.swimming-fish i:nth-child(2){left:35%}.swimming-fish i:nth-child(3){left:80%}}
.immersive-game[data-phase=answering] .dive-title,.immersive-game[data-phase=feedback] .dive-title{display:none}.immersive-game[data-phase=feedback] .game-pane{background:transparent;border-color:transparent;box-shadow:none;backdrop-filter:none;text-align:center;max-width:650px}.immersive-game[data-phase=feedback] .game-pane h2{font:700 38px ui-monospace,monospace;letter-spacing:.12em;text-transform:uppercase;color:#b8e8e8}.immersive-game[data-phase=feedback] .game-pane details{text-align:left;max-width:420px;margin:16px auto}.immersive-game[data-phase=feedback] .game-pane .muted{color:#adced0}.diver-track{transition:left 1.2s cubic-bezier(.2,.6,.3,1)}.immersive-game[data-phase=feedback] .diver-track{left:calc(50% - 55px)}.living-ocean{filter:brightness(calc(1 - var(--dive-progress)*.35))}@media(max-width:620px){.immersive-game[data-phase=feedback] .game-pane h2{font-size:28px}.immersive-game[data-phase=feedback] .diver-track{left:calc(50% - 38px)}}@media(prefers-reduced-motion:reduce){.diver-track{transition:none}}