@font-face{font-family:Nunito;src:url('assets/nunito.ttf') format('truetype');font-weight:400 900;font-display:swap}
:root{font-family:Nunito,'Trebuchet MS',sans-serif;background:#19172b;color:#f7f3fc;font-synthesis:none;--cyan:#79e6e1;--gold:#ffd185;--muted:#aba2bd;--border:#b49cc929;--ground:168px;--aim:0deg}
*{box-sizing:border-box}body{margin:0;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;background:radial-gradient(ellipse at 75% 5%,#38264055,transparent 65%)}main{flex:1;min-width:0}button,input{font:inherit}button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;touch-action:manipulation}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #ffe2a0;outline-offset:4px}[hidden]{display:none!important}.icon{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle;flex-shrink:0}.app-header{height:76px;display:flex;justify-content:space-between;align-items:center;padding:12px 4.5vw;gap:20px}.brand{padding:0;background:none;color:#f7edf9;text-align:left;font-size:22px;letter-spacing:.8px;font-weight:900;line-height:1.05;gap:11px}.brand b{color:#ffd39b}.brand 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139px);margin:7px auto 18px;border-radius:27px;border:1px solid #bc8eaa40;box-shadow:0 23px 45px #0e0c232b;display:grid;grid-template-columns:1.1fr 1fr;align-items:center;padding:48px 60px 69px}.home-scenery{position:absolute;inset:0;background:linear-gradient(90deg,#291b3aea,#34213cce 39%,#62394f42 77%,#23162b38),url('assets/planet.png') center/cover;z-index:0}.home-content,.home-demo,.home-bottom{position:relative;z-index:1}.eyebrow{font-size:11px;color:#eab99b;font-weight:900;letter-spacing:1.9px;display:flex;align-items:center;gap:8px}.eyebrow i{width:6px;height:6px;background:#e4b79b;border-radius:50%}.home-content h1{font-size:clamp(57px,5.1vw,79px);font-weight:900;line-height:.98;letter-spacing:-2.5px;margin:26px 0 24px;color:#fff6ed;text-shadow:0 5px 0 #3722355c}.home-content h1 em{font-style:normal;color:#ffc981}.home-content>p{font-size:18px;line-height:1.8;color:#dbc0d3;margin:0}.home-actions{display:flex;align-items:center;gap:13px;margin-top:29px;flex-wrap:wrap}.primary-button{color:#533221;background:linear-gradient(#ffe1a5,#fac37b);border:1px solid #ffe9ba;border-radius:12px;min-height:46px;padding:11px 23px;font-size:16px;font-weight:900;box-shadow:0 4px 0 #9b673f;transition:transform .12s,filter .12s}.primary-button:hover{filter:brightness(1.06);transform:translateY(-1px)}.primary-button:active{transform:translateY(2px);box-shadow:0 2px 0 #9b673f}.primary-button.large{min-height:54px;font-size:18px;padding:14px 28px}.primary-button .play{fill:currentColor;width:17px;height:17px}.secondary-button{color:#ecd8e8;background:#a4769020;border:1px solid #d5a8c04c;border-radius:12px;min-height:46px;padding:11px 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b{font-size:21px;line-height:1.1;color:#ffe1af;font-variant-numeric:tabular-nums}.equation-strip{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:10px 19px;border:1px solid #ceb2d92a;border-bottom:0;border-radius:16px 16px 0 0;background:#32253f}.equation-instruction{display:flex;align-items:center;gap:8px;color:#c9b5d0;font-size:13px;font-weight:700}.equation-instruction>.icon{width:19px;height:19px;color:#87d8d6}.equation{display:flex;align-items:center;justify-content:center;gap:14px;font-size:26px;font-weight:900;color:#87e4e2;white-space:nowrap}.equation .operator{color:#9c829f;font-size:21px;font-weight:600}.equation .unknown{min-width:38px;padding:1px 10px;border:1px dashed #9c789e88;border-radius:8px;background:#94789b19;color:#edd7f3}.equation>span:last-child{color:#ffda9b}.tap-note{font-size:12px;color:#9d84a8}.arena{height:clamp(390px,calc(100dvh - 307px),670px);position:relative;isolation:isolate;overflow:hidden;border:1px solid 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#42293930;color:#f4d9c7}.target-console>span{font-size:10px;letter-spacing:1.4px;font-weight:900;color:#aabac7;display:block}.target-console strong{display:block;font-size:49px;color:#ffe0a2;line-height:1.05;margin:4px 0;letter-spacing:-1px;font-weight:900;text-shadow:0 0 20px #e9c98322}.target-console small{font-size:11px;color:#91a6b8}.cannon{position:absolute;bottom:-6px;left:50%;width:182px;height:182px;transform:translateX(-50%)}.gun-body{position:relative;width:100%;height:100%;transform:rotate(var(--aim));transform-origin:50% 89%;transition:transform .14s ease-out}.gun-body>img{display:block;width:100%;height:100%;filter:drop-shadow(0 8px 10px #302b5860);pointer-events:none}.gun-body strong{position:absolute;left:50%;top:62.5%;transform:translate(-50%,-50%) rotate(calc(-1 * var(--aim)));font-size:39px;line-height:1;font-weight:900;letter-spacing:-1.5px;color:#174374;text-shadow:0 1px 0 #cafff7}.gun-body 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dialog{width:min(640px,calc(100vw - 28px));max-height:90dvh;padding:0;border:1px solid #b98abd5c;border-radius:23px;background:linear-gradient(145deg,#423049,#241e36);color:#f9edf5;box-shadow:0 24px 100px #0806149c}dialog::backdrop{background:#100d218c;backdrop-filter:blur(7px)}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:18px 23px;border-bottom:1px solid #c1a2ca23;gap:15px}.modal-header h2{font-size:22px;font-weight:900;margin:0}.modal-header .tool-button{border:0;background:#b99fcc12}#modalBody{padding:24px}.modal-copy{font-size:16px;line-height:1.8;color:#d6c1dc;margin:0}.modal-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:23px}.help-step{display:flex;gap:13px;margin-bottom:19px;font-size:16px;line-height:1.7;color:#dac3dd}.help-step>span{flex-shrink:0;width:32px;height:32px;display:grid;place-items:center;border-radius:10px;color:#ffdba2;background:#bc825326;font-weight:900;margin-top:2px}.help-step p{margin:0}.help-step b{color:#ffe5d8}.help-equation{display:block;text-align:center;font-size:28px;font-weight:900;color:#96e2db;background:#98b5b513;border:1px solid #a5c4c124;border-radius:14px;padding:14px;margin:18px 0}.help-note{font-size:14px;line-height:1.8;color:#c6a9d0;background:#bca1c411;border:1px solid #c2a2d026;border-radius:12px;padding:13px 16px}.teacher-list{font-size:15px;line-height:1.8;color:#d5bfdd;padding-left:20px}.teacher-list li+li{margin-top:8px}.result-symbol{display:grid;place-items:center;width:65px;height:65px;border-radius:20px;margin:2px auto 14px;background:#e3b56d1a;color:#ffda98}.result-symbol>.icon{width:35px;height:35px}.result-symbol.loss{color:#c9b9e5;background:#b5a3cf17}.result-title{font-size:31px;font-weight:900;line-height:1.2;color:#ffe2a8;text-align:center;margin:10px 0}.result-copy{font-size:15px;line-height:1.7;color:#cdb5d6;text-align:center;margin:12px 0 21px}.result-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.result-stats>div{border:1px solid #c29cd029;border-radius:12px;background:#a179b016;text-align:center;padding:12px 7px}.result-stats b{display:block;font-size:26px;font-weight:900;color:#f7e6fa}.result-stats small{display:block;font-size:12px;color:#bd9bcc;margin-top:4px}.review-label{font-size:13px;color:#d9bfe7;font-weight:800;margin:20px 0 10px}.review-list{display:flex;flex-wrap:wrap;gap:8px}.review-chip{border:1px solid #c7aad528;border-radius:9px;padding:9px 12px;color:#cae9de;background:#8eb6a510;font-size:16px;font-weight:800}.result-note{font-size:12px;color:#ab8aba;line-height:1.7;text-align:center;margin-top:16px}.sound-preview{display:flex;gap:9px;flex-wrap:wrap;justify-content:center;margin-top:18px}.sound-preview button{font-size:14px}.confetti{position:fixed;inset:0;overflow:hidden;pointer-events:none;z-index:30}.confetti>i{position:absolute;left:var(--left);top:-10%;width:9px;height:14px;background:var(--color);border-radius:2px;animation:fall var(--time) linear var(--delay) forwards}@keyframes beam{0%{opacity:.9}100%{opacity:0}}@keyframes bolt{to{transform:translate(var(--dx),var(--dy))}}@keyframes impact{to{transform:scale(2.8);opacity:0}}@keyframes score{to{margin-top:-37px;opacity:0}}@keyframes shake{25%{margin-left:-4px}75%{margin-left:4px}}@keyframes rescue{to{margin-top:-33px;opacity:0;filter:brightness(1.5)}}@keyframes fall{to{top:110%;transform:rotate(440deg);opacity:.1}}
@media(min-width:1700px){:root{--ground:198px}.app-header{height:91px}.brand{font-size:26px}.brand small{font-size:11px}.brand-mark{width:47px;height:47px}.home-screen{max-width:1500px;min-height:calc(100dvh - 156px);padding-left:76px;padding-right:76px}.home-content h1{font-size:92px}.home-content>p{font-size:21px}.demo-ship{width:300px;height:300px}.demo-ship>strong{font-size:74px}.demo-equation{width:440px;font-size:48px;padding:17px 31px}.demo-equation-labels{width:370px;font-size:11px}.demo-caption{font-size:13px}.demo-note{font-size:15px}.sound-samples button{font-size:14px;min-height:40px}.sound-samples>span{font-size:12px}.home-details{font-size:14px}.home-bottom{font-size:14px;padding:20px 35px}.game-screen{max-width:1630px}.mission-bar{margin-bottom:17px}.mission-title h1{font-size:29px}.mission-title>span{font-size:12px}.equation-strip{padding:12px 23px}.equation{font-size:32px}.equation-instruction{font-size:16px}.tap-note{font-size:14px}.arena{height:clamp(480px,calc(100dvh - 345px),750px)}.arena-hud{top:17px;left:24px;right:24px}.sector-label{font-size:15px}.time-chip{font-size:17px}.cannon{width:218px;height:218px}.gun-body strong{font-size:47px}.cannon-label{font-size:10px;bottom:12px;width:164px}.target-console{left:35px;bottom:28px;padding:14px 24px 12px;min-width:182px}.target-console strong{font-size:60px}.target-console>span{font-size:12px}.target-console small{font-size:13px}.energy-console{right:38px;bottom:43px;width:230px}.energy-console>div:first-child{font-size:13px}.energy-console b{font-size:18px}.energy-console small{font-size:13px}.energy-track{height:17px}.safety-line>span{font-size:11px}.feedback strong{font-size:17px}.feedback p{font-size:14px}.game-bottom{min-height:62px;margin-top:20px}.shot-count{font-size:20px}.shot-count small{font-size:14px}.app-footer{font-size:13px}}
@media(max-height:800px) and (min-width:1000px){:root{--ground:145px}.app-header{height:65px}.mission-bar{min-height:52px;margin-bottom:9px}.mission-title h1{font-size:21px}.equation-strip{padding:7px 16px}.equation{font-size:24px}.arena{height:clamp(350px,calc(100dvh - 277px),530px)}.cannon{width:159px;height:159px}.gun-body strong{font-size:35px}.target-console{padding:9px 16px;min-width:141px;bottom:17px}.target-console strong{font-size:43px}.energy-console{bottom:27px;width:165px}.safety-line>span{font-size:9px}.game-bottom{margin-top:13px;min-height:47px;margin-bottom:5px}.home-screen{min-height:calc(100dvh - 119px);padding-top:25px;padding-bottom:68px;padding-left:53px;padding-right:45px;margin-top:3px;margin-bottom:13px}.home-content h1{font-size:59px;margin:18px 0}.home-content>p{font-size:16px}.home-actions{margin-top:23px}.home-details{margin-top:20px}.sound-samples{margin-top:24px;padding-top:16px}.demo-ship{width:217px;height:217px}.demo-ship>strong{font-size:54px}.demo-note{margin-top:17px}.app-footer{min-height:32px;padding:6px 16px}}
@media(max-width:1350px){.home-screen{margin-left:28px;margin-right:28px;padding-left:39px;padding-right:35px}.home-content h1{font-size:61px}.home-content>p{font-size:16px}.eyebrow{font-size:10px;letter-spacing:1.2px}.demo-equation{width:330px;gap:13px;font-size:34px}.demo-equation-labels{width:280px;font-size:9px}.demo-ship{width:217px;height:217px}.demo-ship>strong{font-size:53px}.home-details{font-size:11px}.game-screen{padding-left:23px;padding-right:23px}.tap-note{display:none}.equation-strip{gap:20px}.equation{margin-right:10px}.mission-progress{gap:6px}.mission-step{width:49px}}
@media(max-width:900px){.home-screen{padding:30px 30px 75px;grid-template-columns:1fr 1fr;gap:15px}.home-content h1{font-size:52px}.home-content>p{font-size:15px}.home-content>p br{display:none}.primary-button.large{font-size:16px;padding:12px 19px;min-height:49px}.home-actions{gap:10px}.secondary-button{font-size:14px;padding:10px 16px}.home-details{font-size:12px;gap:7px;line-height:1.8}.demo-ship{width:187px;height:187px}.demo-ship>strong{font-size:46px}.demo-equation{width:276px;padding:12px 18px;gap:12px;font-size:28px}.demo-equation b{font-size:22px}.demo-equation-labels{width:243px;font-size:8px}.demo-caption{font-size:9px;letter-spacing:1.4px}.demo-note{font-size:11px}.home-bottom{padding:14px 22px;font-size:11px}.home-bottom>span:first-child{max-width:60%;line-height:1.5}.sound-samples>div{flex-wrap:wrap}.sound-samples button{font-size:11px;padding:7px 10px}.game-screen{padding:0 17px}.mission-progress{display:none}.equation-instruction{font-size:12px}.target-console{left:20px}.energy-console{right:21px;width:160px}.ship>strong{font-size:25px}}
@media(max-width:650px){:root{--ground:130px}.app-header{height:73px;padding:12px 15px;gap:10px}.brand{font-size:18px;gap:8px;letter-spacing:.4px}.brand small{font-size:7px;letter-spacing:1.3px}.brand-mark{width:33px;height:35px;border-radius:10px}.brand-mark>.icon{width:24px;height:24px}.header-tools{gap:6px}.header-tools .tool-button{width:39px;min-height:40px;padding:8px;border-radius:10px}.header-tools .tool-label{display:none}.home-screen{margin:0 13px 15px;padding:28px 24px 77px;display:flex;flex-direction:column;gap:24px;border-radius:21px;text-align:center}.home-scenery{background-image:linear-gradient(#2b1c3aea,#3b2441cc 49%,#4f2c3a99),url('assets/planet.png');background-position:62% center}.eyebrow{font-size:9px;letter-spacing:1px;justify-content:center}.home-content h1{font-size:61px;margin:21px 0}.home-content>p{font-size:15px;max-width:300px;margin:auto}.home-actions{justify-content:center;margin-top:23px}.home-details{justify-content:center;margin-top:23px;gap:7px;font-size:11px}.sound-samples{margin:24px auto 0;padding-top:17px}.sound-samples>span{font-size:10px}.sound-samples>div{justify-content:center;gap:6px}.sound-samples button{min-height:40px;font-size:11px;padding:8px 9px}.sound-samples small{font-size:11px}.home-demo{padding:0;margin:0;width:100%}.demo-caption{font-size:10px}.demo-ship{width:175px;height:175px;margin-top:12px;margin-bottom:8px}.demo-ship>strong{font-size:44px}.demo-equation{width:276px;font-size:29px}.demo-note{font-size:12px;margin-top:15px}.home-bottom{font-size:11px;justify-content:center;padding:13px 18px}.home-bottom>span:first-child{display:none}.app-footer{font-size:11px;gap:17px;flex-wrap:wrap}.app-footer button{font-size:11px}.game-screen{padding:0 10px}.mission-bar{min-height:54px;margin-bottom:11px;gap:8px}.mission-title>span{font-size:9px;letter-spacing:1.3px}.mission-title h1{font-size:18px;max-width:170px;margin-top:3px}.game-tools{gap:5px}.game-tools .tool-button{width:36px;min-height:39px;padding:8px}.game-tools .icon{width:18px;height:18px}.score-chip{padding:5px 8px;gap:5px;min-width:67px;margin-right:0;border-radius:9px}.score-chip>.icon{width:17px;height:17px}.score-chip small{font-size:8px}.score-chip b{font-size:18px}.equation-strip{flex-direction:column;gap:6px;padding:8px 11px 10px;border-radius:13px 13px 0 0}.equation-instruction{font-size:12px;gap:6px}.equation-instruction>.icon{width:16px;height:16px}.equation{font-size:26px;gap:12px;margin:0}.equation .operator{font-size:19px}.equation .unknown{min-width:33px;padding:0 8px}.arena{height:clamp(400px,calc(100dvh - 336px),590px);border-radius:0 0 16px 16px;background-position:61% center}.arena-hud{left:12px;right:12px;top:11px}.sector-label{font-size:11px;gap:5px}.sector-label>.icon{width:17px;height:17px}.time-chip{font-size:12px;gap:5px;padding:4px 7px}.time-chip>.icon{width:14px;height:14px}.ship>strong{font-size:21px;letter-spacing:-.6px}.control-deck{height:130px}.target-console{left:11px;bottom:15px;border-radius:12px;padding:9px 8px 8px;min-width:89px}.target-console>span{font-size:8px;letter-spacing:.6px}.target-console strong{font-size:36px;margin:5px 0}.target-console small{font-size:8px}.cannon{width:138px;height:138px;bottom:-4px}.gun-body strong{font-size:30px;letter-spacing:-1px}.cannon-label{font-size:7px;bottom:7px;width:117px;letter-spacing:.7px}.energy-console{right:11px;bottom:28px;width:99px}.energy-console>div:first-child{gap:3px;font-size:9px;letter-spacing:0;margin-bottom:6px;flex-wrap:wrap}.energy-console .icon{width:13px;height:13px}.energy-console b{font-size:12px;margin-left:auto}.energy-track{height:12px}.energy-console small{font-size:9px;line-height:1.4;margin-top:6px}.safety-line>span{right:12px;font-size:8px;letter-spacing:.5px;bottom:5px}.game-bottom{gap:10px;margin-top:15px;min-height:61px;align-items:flex-start;flex-wrap:wrap}.feedback{gap:7px;min-width:0}.feedback strong{font-size:13px}.feedback p{font-size:11px;line-height:1.55}.feedback>span:first-child{width:28px;height:28px;border-radius:8px}.feedback>span:first-child .icon{width:18px;height:18px}.shot-count{font-size:15px;gap:3px;padding-top:4px;padding-right:2px}.shot-count small{font-size:11px}.shot-count>.icon{width:15px}.game-bottom>.primary-button{width:100%;order:3;font-size:14px}.modal-header{padding:15px 16px}.modal-header h2{font-size:20px}#modalBody{padding:19px}.help-step,.modal-copy{font-size:15px}.help-note{font-size:13px}.result-title{font-size:28px}.result-stats b{font-size:23px}.result-stats small{font-size:11px}.result-copy{font-size:14px}.modal-actions{gap:10px}.modal-actions .primary-button,.modal-actions .secondary-button{font-size:14px;padding:11px 16px}.review-chip{font-size:14px}}
@media(max-width:360px){.app-header{padding:10px}.brand{font-size:16px;gap:7px}.brand small{font-size:6px}.brand-mark{width:29px;height:32px}.header-tools{gap:4px}.header-tools .tool-button{width:35px}.mission-title h1{font-size:16px;max-width:140px}.score-chip{min-width:58px;padding:5px 6px}.score-chip>.icon{display:none}.home-screen{padding-left:18px;padding-right:18px}.home-content h1{font-size:53px}.eyebrow{font-size:8px}.demo-equation{width:250px;font-size:27px}.cannon{width:126px;height:126px}.gun-body strong{font-size:28px}.energy-console{width:86px;right:8px}.target-console{left:8px;min-width:82px}.energy-console small{font-size:8px}.target-console strong{font-size:34px}.cannon-label{font-size:6px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}.confetti{display:none}.ship.rescued{opacity:0}.laser-beam{opacity:0}.laser-bolt{display:none}}
/* Readable learning feedback and comfortable touch controls. */
.feedback strong{font-size:16px}.feedback p{font-size:14px}.equation-instruction{font-size:15px}.sound-samples button{font-size:14px;min-height:44px}.sound-samples>span{font-size:12px}.sound-samples small{font-size:12px}.home-details{font-size:13px}.target-console>span{font-size:12px;letter-spacing:.7px}.target-console small{font-size:12px}.energy-console>div:first-child{font-size:12px}.energy-console small{font-size:12px}.sector-label{font-size:14px}.mission-title>span{font-size:12px}.score-chip small{font-size:12px}.home-bottom{font-size:13px}.demo-equation-labels{font-size:12px;letter-spacing:.2px}.demo-caption{font-size:12px}.cannon-label{font-size:11px;letter-spacing:.4px}.brand small{font-size:10px;letter-spacing:1.1px}
@media(max-width:650px){.header-tools .tool-button,.game-tools .tool-button{min-height:44px;width:44px}.brand small{font-size:8px;letter-spacing:.7px}.header-tools{gap:4px}.game-tools{gap:4px}.mission-title>span{font-size:11px;letter-spacing:.6px}.mission-title h1{font-size:17px}.score-chip{min-width:61px;padding:5px 6px}.score-chip>.icon{display:none}.score-chip small{font-size:10px}.equation-instruction{font-size:14px}.feedback strong{font-size:14px}.feedback p{font-size:13px}.sector-label{font-size:12px}.sound-samples button{font-size:12px}.sound-samples small{font-size:12px}.home-details{font-size:12px}.demo-equation-labels{font-size:11px}.demo-caption{font-size:11px}.target-console>span{font-size:10px;letter-spacing:0}.target-console small{font-size:10px;max-width:80px;margin:auto;display:block;line-height:1.3}.energy-console>div:first-child{font-size:11px}.energy-console .icon{display:none}.energy-console small{font-size:11px}.cannon-label{font-size:9px;letter-spacing:0;width:128px}.home-bottom{font-size:12px}}
@media(max-width:360px){.app-header{gap:7px}.brand{font-size:15px}.brand-mark{display:none}.brand small{font-size:8px}.mission-title h1{font-size:16px;max-width:137px}.header-tools .tool-button{width:42px}.home-details{font-size:11px}.energy-console small{font-size:10px}.target-console>span{font-size:9px}.target-console small{font-size:9px}.cannon-label{font-size:8px;width:112px}}