/* NUMBER SMASH! v3.2 — presentation only. Learning and homework remain in the core. */
@font-face{font-family:Smash;src:url('assets/comic-headline.woff') format('woff');font-weight:800;font-style:normal;font-display:swap;}
:root{--smash-blue:#039ee7;--smash-dark:#03213c;--smash-yellow:#ffe439;--smash-red:#f0322f;--comic-type:Smash,'Arial Narrow',Impact,sans-serif;}
[hidden]{display:none!important;}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0;}
button,a,input,select{touch-action:manipulation;}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #174dc3;outline-offset:4px;}.skip-link{position:fixed;top:8px;left:8px;z-index:100;background:#ffe439;color:#03213c;padding:12px;transform:translateY(-180%);font-weight:850;}.skip-link:focus{transform:none;}
.smash-topbar{background:#03213c;border-bottom:4px solid #071622;color:white;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:15px clamp(16px,3vw,45px);position:relative;z-index:8;}.smash-brand{display:block;flex:0 0 auto;border:0;background:none;color:#fff;font:800 italic 20px/1.05 var(--comic-type);text-align:left;letter-spacing:-.035em;transform:rotate(-2deg);padding:3px;}.smash-brand strong{color:#ffe439;display:block;font-size:30px;}.smash-brand small{display:block;font:600 10px/1.5 system-ui;color:#dbe7ef;margin-top:5px;letter-spacing:0;}.smash-nav{display:flex;align-items:center;justify-content:center;gap:9px;flex-wrap:wrap;}.smash-nav button{background:none;color:white;border:0;padding:11px 13px;min-height:44px;border-radius:3px;font:800 italic 13px/1.2 var(--comic-type);text-transform:uppercase;}.smash-nav button[aria-current=page],.smash-nav button:hover{background:#ffe439;color:#05213b;}.smash-teacher{font:800 13px/1.25 system-ui;background:#ffe439;color:#03213c;border:2px solid white;border-radius:6px;min-height:44px;padding:10px 14px;white-space:nowrap;}.smash-topbar :focus-visible{outline-color:#ffe439;}.smash-toolbar{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:9px clamp(14px,3vw,45px);background:#fffdf6;border-bottom:2px solid #03213c;position:relative;z-index:7;font-size:12px;}.smash-toolbar .saved{color:#34546c;font-size:11px;}.smash-preferences{display:flex;gap:15px;align-items:center;flex-wrap:wrap;}.smash-preferences label{display:flex;gap:7px;align-items:center;color:#17324d;font-weight:750;}.smash-preferences select{background:#fff;border:1.5px solid #17324d;border-radius:5px;padding:7px;min-height:38px;font-size:13px;color:#03213c;}.smash-preferences input{width:18px;height:18px;accent-color:#174dc3;}.smash-preferences button{background:#eaf3ff;color:#123459;border:1.5px solid #123459;border-radius:5px;padding:8px 10px;min-height:38px;font-size:12px;font-weight:800;}.motion-status{color:#49627a;max-width:260px;font-size:11px;}
.smash-home{background:#fff9ee;}.smash-stage{position:relative;width:100%;aspect-ratio:3.07;min-height:360px;max-height:660px;isolation:isolate;overflow:hidden;background:#06a6ef url('assets/comic-scenery.webp') center/cover no-repeat;border-bottom:3px solid #05192a;contain:layout paint;}.smash-stage img,.smash-stage svg{display:block;user-select:none;pointer-events:none;}.logo-burst{position:absolute;width:51%;height:92%;left:27.5%;top:1%;z-index:2;}.logo-burst svg{width:100%;height:100%;overflow:visible;}.smash-wordmark{position:absolute;left:32.5%;top:-7%;width:39%;height:86%;object-fit:contain;z-index:4;}.smash-tagline{position:absolute;left:34.5%;top:67%;width:38%;background:white;border:4px solid #061727;box-shadow:3px 4px 0 #061727;transform:rotate(-3deg);z-index:5;font:800 italic clamp(17px,2.25vw,38px)/1.2 var(--comic-type);padding:9px 6px;text-align:center;white-space:nowrap;}.smash-tagline:after{content:'';height:3px;width:78%;display:block;background:#e53931;transform:rotate(-1deg);margin:4px auto 0;}
.brain-position{position:absolute;width:34%;left:-1.7%;top:18%;z-index:5;}.brain-rig{width:100%;height:auto;overflow:visible;}.brain-cape{transform-origin:540px 470px;}.brain-back-leg{transform-origin:596px 760px;}.brain-kick-leg{transform-origin:787px 726px;}.number-sprite{position:absolute;z-index:3;}.number-sprite svg{width:100%;height:auto;overflow:hidden;}.number-zero{width:19%;left:72%;top:25%;}.number-minus{width:14%;left:86%;top:47%;}.number-three{width:16%;left:10.5%;top:67%;z-index:4;}.number-times{width:19%;left:74%;top:65%;}.speech{position:absolute;z-index:6;background:white;border:3px solid #061727;border-radius:47%;font:800 italic clamp(12px,1.3vw,23px)/1.12 var(--comic-type);text-align:center;padding:13px 15px;box-shadow:2px 3px 0 #061727;}.speech:after{content:'';position:absolute;border:12px solid transparent;border-top-color:#061727;bottom:-23px;right:26%;transform:rotate(-20deg);}.speech strong{display:block;color:#0943a4;}.speech-brain{left:10.5%;top:2%;width:13%;transform:rotate(-6deg);}.speech-numbers{right:.7%;top:25%;width:10%;transform:rotate(5deg);}.you-got-this{position:absolute;right:2%;top:2%;background:#ffe439;color:#03172b;font:800 italic clamp(16px,1.8vw,28px)/1.05 var(--comic-type);padding:10px 20px;transform:rotate(-5deg);clip-path:polygon(4% 4%,93% 0,98% 10%,92% 16%,100% 24%,94% 29%,97% 40%,92% 50%,99% 62%,95% 79%,100% 88%,1% 100%,6% 80%,0 71%,7% 60%,0 46%,6% 34%,1% 22%);z-index:6;text-align:center;}
.comic-impact{position:absolute;display:grid;place-items:center;aspect-ratio:1.45;background:#062037;color:#ffe439;clip-path:polygon(3% 19%,21% 22%,16% 3%,36% 14%,44% 0,55% 14%,70% 2%,75% 21%,96% 9%,87% 33%,100% 46%,88% 58%,97% 81%,77% 76%,73% 99%,59% 83%,43% 100%,37% 82%,15% 97%,20% 73%,0 76%,10% 52%,0 43%,12% 36%);padding:9px;z-index:7;}.comic-impact:before{content:'';position:absolute;inset:5px;clip-path:inherit;background:#ff392c;z-index:-1;}.comic-impact b{font:800 italic clamp(25px,4.8vw,73px)/1 var(--comic-type);text-shadow:3px 3px 0 #051522;-webkit-text-stroke:1px #071a2d;transform:rotate(-6deg);}.impact-pow{width:12%;left:23.5%;top:58%;transform:rotate(-12deg);}.impact-bam{width:13%;left:76.5%;top:0%;transform:rotate(7deg);}.action-lines{position:absolute;inset:0;pointer-events:none;z-index:1;background:repeating-conic-gradient(from 5deg at 31% 58%,transparent 0 8deg,#fff5b688 9deg 10deg,transparent 11deg 26deg);opacity:0;}.intro-controls{position:absolute;left:12px;bottom:9px;z-index:9;display:flex;gap:8px;}.intro-controls button{background:#fffdf7;color:#08233c;border:2px solid #08233c;box-shadow:2px 2px 0 #08233c;border-radius:5px;min-height:38px;padding:7px 11px;font-size:12px;font-weight:850;}.intro-controls button:disabled{opacity:1;background:#e4e9ef;color:#4a5965;box-shadow:none;}
.mission-rocks{position:relative;z-index:6;display:grid;grid-template-columns:repeat(5,minmax(0,1fr)) 1.2fr;gap:7px;background:#06233e;padding:0 max(18px,5vw) 12px;margin-top:-1px;align-items:stretch;}.mission-rocks button{color:#081c2d;background:linear-gradient(145deg,#e0e7ee,#a3b1c3);border:3px solid #04121f;border-top-color:#4d6578;box-shadow:2px 4px 0 #0007;transform:skew(-4deg);padding:11px 7px;min-height:84px;font:800 italic clamp(12px,1.15vw,18px)/1.25 var(--comic-type);min-width:0;white-space:normal;}.mission-rocks button small{display:block;font:800 11px/1.4 system-ui;color:#345169;margin:0 0 5px;}.mission-label{display:block;max-width:100%;text-transform:uppercase;overflow-wrap:normal;}.mission-label>span{display:block;}.mission-rocks button:hover{background:#ffe439;}.math-future{display:grid;align-items:center;justify-content:center;background:#ffe439;transform:rotate(-2deg);color:#061927;border:2px solid #05192a;font:800 italic clamp(13px,1.4vw,22px)/1.15 var(--comic-type);padding:10px;}
.home-content{max-width:1260px;margin:auto;padding:35px clamp(16px,3vw,36px) 50px;}.home-kicker{font-size:11px;letter-spacing:.12em;font-weight:900;color:#164a84;}.start-panel{display:flex;justify-content:space-between;align-items:center;gap:35px;padding:18px 0 30px;}.start-panel h2{font-size:clamp(27px,3.2vw,45px);line-height:1.13;margin:12px 0;}.start-panel h2 em{font-style:normal;color:#174dc3;}.start-panel p{font-size:16px;max-width:520px;color:#405371;}.start-actions{display:flex;flex-direction:column;gap:13px;min-width:300px;}.smash-primary,.smash-secondary{min-height:54px;border:3px solid #092137;border-radius:6px;box-shadow:4px 4px 0 #092137;padding:13px 19px;font-size:17px;font-weight:900;}.smash-primary{background:#ffe439;color:#071e33;}.smash-secondary{background:#164fc3;color:white;}.start-actions small{text-align:center;color:#4d6075;font-size:12px;padding-top:2px;}.home-path{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:17px;margin:12px 0 30px;}.home-path article{display:flex;flex-direction:column;background:#fff;border:2px solid #082139;border-radius:8px;box-shadow:4px 4px 0 #082139;padding:22px 20px;}.home-path article>span{font:800 italic 13px/1 var(--comic-type);color:#174dc3;}.home-path h3{font-size:22px;margin:12px 0 10px;}.home-path p{font-size:14px;line-height:1.6;color:#455a72;flex:1;}.home-path button{color:#071f3b;background:#ffed80;border:2px solid #0b233d;border-radius:5px;font-size:13px;font-weight:850;padding:10px;min-height:44px;margin-top:16px;}.home-tools{display:grid;grid-template-columns:1.1fr 1fr;gap:25px;margin:38px 0;}.home-tools h2{font-size:27px;margin:10px 0 17px;}.home-tools form label{display:block;font-size:13px;font-weight:750;margin-bottom:8px;}.home-tools form>div{display:flex;gap:8px;}.home-tools input[type=search]{min-width:0;flex:1;border:2px solid #16314b;border-radius:5px;padding:12px;font-size:14px;}.home-tools form button{background:#174dc3;color:#fff;border:2px solid #08213a;padding:10px 14px;border-radius:5px;font-weight:800;}.search-result{display:block;width:100%;text-align:left;margin-top:9px;padding:12px;background:white;border:1px solid #34536e;border-radius:5px;font-weight:750;min-height:44px;}.search-note{font-size:13px;line-height:1.5;padding-top:10px;}.power-panel{background:#eaf3ff;border:2px solid #0b2340;box-shadow:3px 4px 0 #0b2340;padding:22px;border-radius:8px;}.power-panel p{font-size:12px;color:#46576d;margin-top:12px;}.power-badges{display:flex;flex-wrap:wrap;gap:7px;}.power-badge{display:inline-block;border:1.5px solid #436078;color:#345069;background:#fff;padding:8px;border-radius:6px;font-size:11px;font-weight:800;}.power-badge.unlocked{background:#ffe439;color:#092036;border-color:#092036;}.paper-callout{display:flex;gap:19px;align-items:center;padding:23px;background:#ffed99;border:2px solid #092136;border-radius:8px;box-shadow:4px 4px 0 #092136;}.paper-callout>span{font-size:45px;}.paper-callout div{flex:1;}.paper-callout h2{font-size:23px;margin:0 0 8px;}.paper-callout p{font-size:14px;margin:0;}.paper-callout button{background:white;border:2px solid #092136;border-radius:5px;padding:13px;min-height:48px;font-weight:850;}.site-footer{display:flex;flex-direction:column;gap:7px;text-align:center;background:#03213c;color:#fff;padding:30px 15px;border-top:4px solid #ffe439;}.site-footer strong{font:800 italic 23px/1 var(--comic-type);color:#ffe439;}.site-footer span{color:#eaf3ff;}.site-footer .creator-credit{font-size:13px;color:white;margin-top:8px;}
/* Brief optional celebrations never cover answers or take focus. */
#smashCelebration{position:fixed;right:20px;bottom:20px;z-index:30;max-width:min(280px,calc(100vw - 40px));pointer-events:none;background:#ffe439;border:3px solid #03213c;box-shadow:4px 4px 0 #03213c;padding:13px 17px;transform:rotate(-3deg);border-radius:5px;}#smashCelebration b{display:block;color:#e32727;font:800 italic 35px/1 var(--comic-type);text-shadow:1px 2px 0 #03213c;}#smashCelebration span{display:block;color:#03213c;font-size:13px;font-weight:850;margin-top:6px;}#smashCelebration.pop{animation:smash-small-win 1.9s both;}.game-victory-symbol{font:800 italic 27px/1 var(--comic-type);}.game-victory,.mission-won{background:#fff4b9;border:2px solid #092136;}.no-script-note{padding:30px;background:#fff6c7;}.artwork-fallback .smash-wordmark{display:none;}.artwork-fallback .smash-stage h1{clip-path:none!important;position:absolute!important;width:43%;height:auto;left:31%;top:10%;font:950 italic clamp(42px,7vw,100px)/1 system-ui;color:#f63228;text-shadow:3px 4px 0 #03213c;z-index:5;white-space:normal;}
/* 4.2-second opening; replay is user-controlled. All layers settle to the base layout. */
@keyframes smash-small-win{0%{opacity:0;transform:translateY(10px) rotate(-3deg) scale(.9)}14%,78%{opacity:1;transform:rotate(-3deg)}100%{opacity:0;transform:translateY(-6px) rotate(-3deg)}}
/* The setting and system preference each win over every animation. */
[data-smash-motion=reduced] *,[data-smash-motion=off] *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}[data-smash-motion=reduced] .action-lines,[data-smash-motion=off] .action-lines{opacity:0!important;}.calm .speech,.calm .you-got-this,.calm .impact-bam{display:none;}.calm .smash-stage{background-image:none;background-color:#ddecf8;}.calm .logo-burst{opacity:.5;}.calm .home-path article,.calm .power-panel,.calm .paper-callout{box-shadow:none;}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important;}.action-lines{opacity:0!important;}}
@media(max-width:1100px){.smash-topbar{gap:10px;padding:12px 18px;}.smash-nav{gap:2px;}.smash-nav button{font-size:11px;padding:9px;}.smash-brand{font-size:16px;}.smash-brand strong{font-size:24px;}.smash-teacher{font-size:11px;}.smash-stage{min-height:340px;}.home-path{grid-template-columns:repeat(2,minmax(0,1fr));}.smash-toolbar .motion-status{display:block;max-width:none;flex-basis:100%;}.speech{padding:10px;}.start-actions{min-width:270px;}}
@media(max-width:760px){.smash-topbar{flex-wrap:wrap;gap:12px;}.smash-brand{order:0;}.smash-teacher{order:1;margin-left:auto;font-size:12px;}.smash-nav{order:2;width:100%;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:3px;}.smash-nav button{padding:9px 3px;font-size:10px;}.smash-toolbar{gap:9px;padding:10px 13px;}.smash-toolbar .saved{width:100%;}.smash-preferences{width:100%;gap:10px;justify-content:space-between;}.smash-preferences label{font-size:11px;}.smash-preferences select,.smash-preferences button{min-height:44px;}.smash-preferences .celebration-switch{min-height:44px;}.smash-stage{aspect-ratio:1.7;min-height:385px;max-height:none;}.logo-burst{left:17%;width:75%;height:65%;top:0;}.smash-wordmark{left:23%;width:62%;height:58%;top:-4%;}.smash-tagline{left:26%;top:46%;width:58%;font-size:clamp(14px,2.7vw,22px);padding:7px 3px;border-width:3px;}.brain-position{width:51%;left:-5%;top:28%;}.number-zero{left:74%;top:52%;width:24%;}.number-minus{left:84%;top:72%;width:17%;}.number-three{width:23%;left:17%;top:74%;}.number-times{display:none;}.speech-brain{top:2%;left:1.5%;width:18%;font-size:11px;}.speech-numbers{display:none;}.you-got-this{right:2%;top:5%;font-size:13px;padding:8px;}.impact-pow{left:37%;top:65%;width:16%;}.impact-bam{left:73%;top:28%;width:18%;}.comic-impact b{font-size:32px;}.mission-rocks{grid-template-columns:repeat(2,minmax(0,1fr));padding:10px 12px 14px;gap:8px;}.mission-rocks button{font-size:14px;padding:12px 8px;min-height:84px;border-width:2px;transform:none;}.mission-rocks button:last-of-type{grid-column:1/-1;}.math-future{display:none;}.start-panel{gap:20px;}.start-actions{min-width:220px;}.smash-primary,.smash-secondary{font-size:14px;}.home-tools{grid-template-columns:1fr;}.paper-callout{flex-wrap:wrap;}.paper-callout button{margin-left:60px;}}
@media(max-width:480px){.smash-nav{grid-template-columns:repeat(3,minmax(0,1fr));}.smash-nav button{font-size:11px;}.smash-stage{aspect-ratio:auto;height:456px;min-height:456px;}.logo-burst{left:1%;top:0;width:99%;height:49%;}.smash-wordmark{left:6%;top:-4%;width:88%;height:47%;}.smash-tagline{left:8%;top:36.5%;width:84%;font-size:clamp(13px,3.65vw,18px);padding:8px 3px;}.brain-position{left:-10%;top:47%;width:76%;}.number-zero{left:66%;top:47%;width:37%;}.number-minus{left:78%;top:69%;width:30%;}.number-three{left:24%;top:74%;width:31%;}.impact-pow{left:49%;top:64%;width:24%;}.impact-bam{left:77%;top:3%;width:20%;opacity:.98;}.impact-bam b{font-size:25px;}.speech-brain,.you-got-this{display:none;}.intro-controls{left:9px;bottom:9px;}.intro-controls button{font-size:11px;min-height:44px;padding:7px 9px;}.mission-rocks{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;padding:10px 12px 14px;}.mission-rocks button{transform:none;min-height:84px;font-size:13px;line-height:1.3;}.mission-rocks button:last-of-type{grid-column:1/-1;min-height:84px;}.home-content{padding-top:20px;}.start-panel{display:block;padding-top:0;}.start-panel h2{font-size:29px;}.start-actions{margin-top:22px;}.smash-primary,.smash-secondary{font-size:16px;}.home-path{gap:12px;}.home-path article{padding:18px 13px;}.home-path h3{font-size:20px;}.home-path p{font-size:13px;}.home-path button{font-size:12px;}.home-tools h2{font-size:25px;}.paper-callout{padding:18px;gap:13px;}.paper-callout>span{font-size:34px;}.paper-callout h2{font-size:21px;}.paper-callout div{min-width:190px;}.paper-callout button{margin:0;width:100%;}.home-tools input[type=search]{font-size:16px;width:0;}.smash-toolbar .saved{font-size:10px;}.smash-preferences{gap:5px;}.smash-preferences label{gap:4px;}.smash-preferences button{font-size:11px;padding:7px;}}
@media(max-width:350px){.smash-preferences{justify-content:flex-start;column-gap:10px;row-gap:4px;}.smash-preferences button{margin-left:auto;}.smash-stage{height:430px;min-height:430px;}.home-path{grid-template-columns:1fr;}.smash-teacher{max-width:135px;white-space:normal;}}
@media print{.smash-topbar,.smash-toolbar,.smash-home,.site-footer,#smashCelebration,.skip-link,.no-script-note{display:none!important;}#printRoot{display:block!important;}#printRoot .print-document h1{font-family:Arial,sans-serif;font-style:normal;font-size:21pt;}.print-document .print-cover .creator-credit{font-size:9pt;}#printRoot *{animation:none!important;transform:none!important;box-shadow:none!important;}}
/* Keep all section choices visible on a phone, with no sideways navigation scroll. */
@media(max-width:710px){#topicNav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;overflow:visible;}.topic-link{min-width:0;width:100%;min-height:48px;}.topic-link span.topic-label{white-space:normal;}.smash-toolbar .saved{display:block;}.rounding-number{gap:3px;}.rounding-digit{min-width:0;width:clamp(20px,5.3vw,32px);}.game-digit-track{overflow-x:auto;max-width:100%;}}
/* The game uses the same direct left/right movement as the teaching demo. */
.game-decimal-board{background:#eff4ff;border:2px solid #142044;border-radius:15px;padding:25px 23px;touch-action:pan-y pinch-zoom;user-select:none;}
.game-digit-track.decoder-track{position:relative;display:grid;grid-template-columns:repeat(var(--digit-count),minmax(0,1fr));gap:0;overflow:visible;border:0;background:none;padding:0;min-height:64px;align-items:center;}
.decoder-track .game-digit{min-width:0;margin:0 4px;font-size:clamp(20px,5.6vw,40px);padding:8px 0;}
.decoder-track .game-moving-dot{position:absolute;left:calc(var(--decimal-at)*100%/var(--digit-count));top:0;bottom:0;width:44px;display:grid;place-items:center;padding:0;transform:translateX(-50%);background:transparent;z-index:2;touch-action:none;cursor:grab;outline-offset:2px;}
.decoder-track .game-moving-dot>span{display:grid;place-items:center;width:14px;height:52px;padding-bottom:5px;background:#ffe439;color:#663800;border:1px solid #936414;border-radius:8px;font:900 35px/1 ui-monospace,monospace;box-shadow:0 2px 0 #142044;}
.game-decimal-board.is-dragging .game-moving-dot{cursor:grabbing;}.game-moving-dot:focus-visible{outline:3px solid #174dc3;border-radius:8px;}.decoder-drag-help{font-size:13px;font-weight:750;line-height:1.5;color:#173d65;margin:10px 0;}
@media(max-width:380px){.game-decimal-board{padding:20px 20px;}.decoder-track .game-digit{margin:0 2px;font-size:21px;}.decoder-track .game-moving-dot>span{width:12px;}}
.assignment-save-controls{padding:16px 0;margin:10px 0;border-top:1px solid #b7c7dd;border-bottom:1px solid #b7c7dd;}.assignment-save-controls .btn-row{margin-top:0;}.assignment-save-status{font-size:13px;font-weight:800;color:#173d65;}.assignment-import{display:inline-flex;align-items:center;position:relative;cursor:pointer;}.assignment-import input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;}.assignment-import:focus-within{outline:3px solid #174dc3;outline-offset:3px;}.teacher-sharing{background:#fff8d7;border:2px solid #142044;border-radius:8px;padding:20px;margin-top:22px;}.teacher-sharing>p{font-size:14px;}.teacher-sharing #teacherShareStatus{font-weight:750;color:#173d65;margin:12px 0;}.teacher-sharing a{display:inline-flex;align-items:center;text-decoration:none;}.teacher-sharing textarea{overflow-wrap:anywhere;word-break:break-all;}.teacher-sharing #shareResult{margin-top:16px;}
@media(max-width:480px){.assignment-save-controls .btn-row{display:grid;grid-template-columns:1fr;}.assignment-save-controls .btn-row>*{min-height:46px;justify-content:center;text-align:center;font-size:14px;}.teacher-sharing{padding:15px;}}
@media print{.assignment-save-controls,.teacher-sharing,.decoder-drag-help{display:none!important;}.decoder-track .game-moving-dot{background:transparent!important;}}
/* The header now plays a rendered movie. Artwork remains the no-motion/error fallback. */
.smash-video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;z-index:8;opacity:0;pointer-events:none;background:#05a6ef;}
.smash-stage.has-video .smash-video{opacity:1;}
.smash-stage{aspect-ratio:1536/500;min-height:0;max-height:none;height:auto;}
.intro-controls{align-items:center;flex-wrap:wrap;right:12px;}
.intro-controls button{min-height:44px;font-size:12px;}
.video-status:empty{display:none;}
.video-status{background:#fffdf7;color:#08233c;border:2px solid #08233c;border-radius:5px;padding:8px 10px;max-width:100%;font-size:12px;font-weight:750;}
@media(max-width:760px){.smash-stage{aspect-ratio:720/840;min-height:0;height:auto;}.logo-burst{left:1%;top:0;width:99%;height:49%;}.smash-wordmark{left:6%;top:-4%;width:88%;height:47%;}.smash-tagline{left:8%;top:36.5%;width:84%;font-size:clamp(13px,3.65vw,25px);}.brain-position{left:-10%;top:47%;width:76%;}.number-zero{left:66%;top:47%;width:37%;}.number-minus{left:78%;top:69%;width:30%;}.number-three{left:24%;top:74%;width:31%;}.impact-pow{left:49%;top:64%;width:24%;}.impact-bam{left:77%;top:3%;width:20%;}.speech-brain,.you-got-this{display:none;}.intro-controls{bottom:9px;left:9px;right:9px;gap:6px;}.intro-controls button,.video-status{font-size:11px;}}
[data-smash-motion=reduced] .smash-video,[data-smash-motion=off] .smash-video{visibility:hidden;}
@media(prefers-reduced-motion:reduce){.smash-video{visibility:hidden;}}
/* A deliberate Play action may start the video under an OS motion preference;
   automatic playback and all other decorative motion remain disabled. */
.smash-stage.manual-video .smash-video{visibility:visible;}