:root{--ink:#102c3c;--wine:#7e384c;--paper:#f7f6f1;--blue:#e2f1f4;--dark:#0b0f10;--green:#99ffc8;--cyan:#87deeb;--line:#294039;--mono:ui-monospace,'SFMono-Regular',Consolas,'Liberation Mono',monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;line-height:1.6}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,textarea:focus-visible,input:focus-visible{outline:3px solid #dcad56;outline-offset:5px}button{min-height:46px}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.1;letter-spacing:-.045em}p+p{margin-top:16px}.skip{position:fixed;top:-100px;left:12px;z-index:100;background:white;color:black;padding:12px}.skip:focus{top:12px}[hidden]{display:none!important}.wrap{max-width:1240px;margin:auto;padding:0 40px}.lobby{background:var(--paper);color:var(--ink)}.top{max-width:1440px;margin:auto;padding:30px 40px;display:flex;gap:24px;align-items:center;justify-content:space-between;border-bottom:1px solid #17313c20}.brand{font-size:23px;font-weight:800;line-height:1;letter-spacing:-1px;display:block;flex-shrink:0}.brand span{font-weight:400;margin-left:4px}.brand small{display:block;font:9px/1.4 var(--mono);letter-spacing:2px;margin-top:9px}.free-tag,.eyebrow,.file-top,.file-bottom,.feature-text>p,.topic-level,.topic-foot{font:11px/1.5 var(--mono);letter-spacing:1.5px}.free-tag{border:1px solid #7e384c45;border-radius:30px;padding:10px 14px;color:var(--wine)}.text-link{font-size:13px;text-decoration:underline;text-underline-offset:5px}.lobby-hero{display:grid;grid-template-columns:1.12fr 1fr;gap:70px;align-items:center;padding:70px 0 80px}.eyebrow{color:var(--wine);margin-bottom:25px}.lobby-hero h1{font-size:clamp(42px,5.2vw,70px);font-weight:650;line-height:1.02}.lobby-hero em{font-family:Georgia,serif;font-weight:400;color:var(--wine)}.lead{font-size:22px;line-height:1.55;margin-top:28px}.muted{color:#64717a;font-size:15px;margin:16px 0 26px}.primary,.outline{display:inline-flex;gap:30px;align-items:center;justify-content:center;border:0;background:var(--wine);color:white;padding:15px 24px;border-radius:8px;font-size:15px;font-weight:650;min-height:50px;transition:transform .25s,box-shadow .3s}.primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px #79384d25}.outline{background:transparent;border:1px solid #78384d55;color:var(--wine)}.featured{background:#101b19;color:#eafaf0;position:relative;min-height:540px;padding:24px 30px 28px;overflow:hidden;border-radius:10px 50px 10px 10px;transform:rotate(2deg);transition:transform .4s;box-shadow:0 25px 55px #19323920;background-image:linear-gradient(#86f4ab08 1px,transparent 1px),linear-gradient(90deg,#86f4ab08 1px,transparent 1px);background-size:30px 30px}.featured:hover{transform:rotate(0)}.file-top{display:flex;justify-content:space-between;color:#a4c4b5;border-bottom:1px solid #507164;padding-bottom:14px}.file-top span:first-child{color:var(--green)}.feature-text{position:relative;z-index:2;padding-top:150px}.feature-text h2{font-size:54px;font-weight:400;margin:14px 0}.feature-text strong{font-family:var(--mono);font-weight:400;font-size:80px;letter-spacing:-6px;color:var(--green)}.feature-text>p{letter-spacing:1px}.file-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:22px}.circle-arrow{display:grid;place-items:center;background:var(--green);color:#10251a;width:46px;height:46px;border-radius:50%;font-size:24px}.stamp{position:absolute;top:100px;left:28px;transform:rotate(-14deg);font:12px var(--mono);letter-spacing:3px;border:1px solid #e5b273;color:#e5b273;padding:8px}.radar{width:270px;height:270px;border:1px solid #71c7a445;border-radius:50%;position:relative;background:repeating-radial-gradient(circle,transparent 0 42px,#84dda52c 43px 44px);isolation:isolate}.radar:before,.radar:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent calc(50% - .5px),#82dbaa40 50%,transparent calc(50% + .5px))}.radar:after{transform:rotate(90deg)}.radar i{position:absolute;inset:0;border-radius:50%;background:conic-gradient(from 0deg,transparent 68%,#8af9b349 96%,#adffd9c0);animation:radar 7s linear infinite}.radar b,.radar span{position:absolute;width:8px;height:8px;background:var(--green);border-radius:50%;left:31%;top:37%;box-shadow:0 0 20px #8efbbb}.radar span{left:70%;top:60%;width:5px;height:5px}.mini-radar{position:absolute;top:78px;right:-24px;opacity:.8}.choose{padding:45px 0 65px;border-top:1px solid #17313c25;scroll-margin-top:20px}.section-heading{display:flex;justify-content:space-between;gap:30px;align-items:end}.section-heading h2{font-size:34px}.section-heading .eyebrow{margin-bottom:14px}.section-heading>p{font-size:14px;color:#67777c}.age-tabs{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:30px 0 14px}.age-tabs button{padding:16px 10px;border:1px solid #bacfd3;background:transparent;border-radius:8px;color:var(--ink);font-size:17px;font-weight:650}.age-tabs button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.age-note{color:#62767b;font-size:13px;margin-bottom:25px}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.topic{padding:26px;border:1px solid #cddadd;border-radius:10px;background:#fffdfa;display:flex;flex-direction:column;min-height:300px}.topic.ready{background:var(--blue);border-color:#9fbfc8;transition:transform .2s}.topic.ready:hover{transform:translateY(-4px)}.topic-mark{font:32px var(--mono);color:var(--wine);height:60px;letter-spacing:-2px}.topic-level{color:#7f4453;margin:8px 0 14px}.topic h3{font-size:23px;line-height:1.2}.topic p{font-size:14px;line-height:1.6;color:#607580;margin:12px 0 24px}.topic-foot{margin-top:auto;letter-spacing:0;padding-top:14px;border-top:1px solid #ccd9db}.topic.soon .topic-foot{color:#6f7f84}.human-note{display:flex;align-items:center;gap:35px;border-top:1px solid #c7d6d8;padding:40px 0}.human-note>div{flex:1}.human-note h2{font-size:28px}.human-note p{font-size:14px;margin-top:15px;max-width:490px;color:#5a6c74}.hand{font:italic 24px Georgia,serif;color:var(--wine);transform:rotate(-8deg);max-width:150px}.footer{display:flex;justify-content:space-between;border-top:1px solid #d0d9d8;padding-top:20px;padding-bottom:25px;font-size:11px;color:#6a7b81}
/* Mission */
.mission{background:var(--dark);color:#e4ece6;background-image:linear-gradient(#92dcb406 1px,transparent 1px),linear-gradient(90deg,#92dcb406 1px,transparent 1px);background-size:44px 44px;min-height:100vh}.mission:before{content:'';position:fixed;inset:0;pointer-events:none;opacity:.035;z-index:-1;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' opacity='.5' filter='url(%23n)'/%3E%3C/svg%3E")}.scan-line{position:fixed;pointer-events:none;left:0;right:0;height:100px;background:linear-gradient(transparent,#8cf7c406,transparent);animation:scan 4s linear infinite;z-index:0}.mission-top{max-width:1440px;margin:auto;padding:24px 38px;display:flex;align-items:center;justify-content:space-between;gap:20px}.mission .brand{font-size:21px}.mission .brand small{color:#8dab9e}.back-link{font-size:12px;color:#b1c6b9}.settings{display:flex;gap:10px}.settings button,.ghost{border:1px solid #365045;background:#152019;color:#cce0d2;border-radius:6px;padding:10px 15px;font:12px/1.4 var(--mono)}.settings button{font-size:10px;min-height:44px}.progress-shell{position:sticky;top:0;z-index:10;background:#0b0f10f5;backdrop-filter:blur(15px);padding:13px max(28px,calc((100vw - 1160px)/2));border-top:1px solid #293a32;border-bottom:1px solid #293a32}.progress-meta{display:flex;justify-content:space-between;font:10px/1.5 var(--mono);letter-spacing:1.5px;color:#9bb3a5;gap:16px;margin-bottom:10px}progress{appearance:none;display:block;width:100%;height:3px;border:0;background:#28382e;color:var(--green)}progress::-webkit-progress-bar{background:#28382e}progress::-webkit-progress-value{background:var(--green);transition:width .6s ease}progress::-moz-progress-bar{background:var(--green)}.mission-wrap{max-width:1216px;padding:40px 28px 20px;margin:auto}.mission #stage{outline:0;min-height:480px;position:relative}.stage-enter{animation:enter .4s ease both}.mission .eyebrow{color:var(--green);font-size:10px;letter-spacing:2px;margin-bottom:18px}.mission h1{font-size:clamp(50px,6.8vw,96px);line-height:.98;font-weight:450;letter-spacing:-6px}.mission h1 strong{font-family:var(--mono);font-weight:400;color:var(--green)}.mission h2{font-size:clamp(30px,4vw,48px);font-weight:450;line-height:1.1}.mission .intro{display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center}.intro-copy{padding:18px 0}.intro-copy .lead{font-size:17px;color:#a9bdb1;line-height:1.8;max-width:555px;margin-bottom:24px}.mission .primary{background:var(--green);color:#0b2014;font:600 13px/1.4 var(--mono);padding:17px 25px;border-radius:5px;position:relative;overflow:hidden}.mission .primary:not(:disabled):hover{box-shadow:0 0 25px #99ffc831}.mission .primary:not(:disabled):active{transform:scale(.98)}.pulse{animation:breathe 3s ease-in-out infinite}.cursor{display:inline-block;animation:cursor 1s steps(1) infinite;color:var(--green);font-size:.65em}.operation-map{border:1px solid #36503f;border-radius:10px;padding:23px;position:relative;background:#111b15}.map-top{display:flex;justify-content:space-between;font:10px var(--mono);color:#9bb5a3}.operation-map .radar{margin:30px auto;width:min(270px,100%);aspect-ratio:1;height:auto}.map-points{display:grid;gap:12px;margin-top:25px;font:10px var(--mono);letter-spacing:1px;color:#adc7b5}.map-points p{margin:0;padding-top:12px;border-top:1px solid #304a39;display:flex;justify-content:space-between}.signal{color:var(--green)}.mission .chips{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0}.chips span{font:10px var(--mono);border:1px solid #37513f;padding:9px 12px;border-radius:3px;color:#b6cbbd}.stage-head{display:flex;justify-content:space-between;align-items:start;gap:30px;margin-bottom:28px}.stage-head p.description{font-size:15px;color:#a9beb1;max-width:700px;line-height:1.7;margin-top:18px}.round-count{font:28px var(--mono);color:var(--green);border:1px solid #35513e;padding:20px;min-width:130px;text-align:center;border-radius:8px}.round-count small{display:block;font:9px var(--mono);color:#9cb1a3;letter-spacing:1px;margin-top:10px}.transmission{background:#121d17;border:1px solid #3c5343;border-left:3px solid var(--green);border-radius:5px;padding:26px 30px;font-size:19px;line-height:2.15;margin-bottom:22px}.slot{display:inline-block;min-width:60px;padding:0 7px;border-bottom:1px dashed #799a85;color:#799a85;font-family:var(--mono);font-size:.85em}.slot.solved{color:var(--green);border:0;background:#a0ffc214;animation:glow .6s}.questions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.question{border:1px solid #304335;border-radius:7px;padding:20px;background:#0f1713}.question.solved{border-color:#42684d}.q-head{display:flex;gap:12px;align-items:baseline;margin-bottom:15px}.q-num{font:11px var(--mono);color:#72927e}.q-title{font:13px var(--mono);line-height:1.7;color:#dae9df;letter-spacing:.5px}.answers{display:flex;gap:7px;flex-wrap:wrap}.choice{border:1px solid #405449;border-radius:5px;background:#18231c;color:#d5e4da;padding:11px 15px;font-size:14px;min-height:46px;transition:background .2s,border-color .2s,transform .2s}.choice:hover:not(:disabled){background:#263b2d;border-color:#96d5aa}.choice.correct{background:#91ffbe1a;border-color:var(--green);color:var(--green);opacity:1}.choice.wrong{border-color:#ff7878;color:#ff9898;animation:shake .3s}.choice:disabled:not(.correct){opacity:.38}.feedback{font-size:12px;color:#99cbaa;margin-top:12px;min-height:20px}.feedback.error{color:#ffa5a5}.mission-nav{display:flex;align-items:center;gap:18px;padding-top:28px;margin-top:30px;border-top:1px solid #293d31}.mission-nav p{flex:1;font-size:12px;color:#9eb3a6}.storage-note{font-size:11px;color:#7e9487;margin-top:22px}.mission-footer{max-width:1216px;margin:0 auto;padding:20px 28px;display:flex;justify-content:space-between;align-items:center;gap:15px;font:9px var(--mono);letter-spacing:1px;color:#6c8674}.mission-footer button{background:none;border:0;color:#98b4a3;min-height:44px;font:10px var(--mono)}.audio-card{padding:20px;border:1px solid #385443;background:#152018;border-radius:8px}.audio-title{font:12px var(--mono);letter-spacing:1px;margin-bottom:15px;display:flex;justify-content:space-between;gap:12px}.audio-title span{font-size:10px;color:#91b49c}.audio-controls{display:flex;gap:10px;align-items:center}.play,.replay{border:1px solid #51745c;color:var(--green);background:#1b2d21;border-radius:50%;height:48px;width:48px;flex-shrink:0}.replay{border:0;background:none;font-size:22px}.bars{display:flex;gap:4px;align-items:center;height:30px;flex:1;justify-content:center}.bars i{display:block;width:3px;height:6px;background:#8be8ab;border-radius:2px}.playing .bars i{animation:wave .8s ease-in-out infinite alternate;animation-delay:calc(var(--i)*-.09s)}.audio-card input[type=range]{width:100%;height:44px;accent-color:var(--green);display:block;margin:5px 0}.audio-time{font:10px var(--mono);color:#b4c6ba}.audio-error{font-size:12px;color:#ffb4b4}.audio-card details{font-size:12px;color:#a2bbaa;margin-top:10px}.audio-card summary{cursor:pointer;min-height:44px;display:flex;align-items:center}.audio-card details p{line-height:1.8;color:#d7e9dd}.audio-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:25px}.listening-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px;align-items:start}.listening-layout .questions{grid-template-columns:1fr}.intro .audio-card{max-width:500px;margin-top:28px}.bonus-card{padding:32px;border:1px solid #36513e;border-radius:10px;background:#152018;max-width:850px}.bonus-card blockquote{margin:20px 0;font-size:20px;line-height:1.8;color:#d6e9dc}.bonus-card .note{font-size:13px;color:#9ab4a3;margin:20px 0}.bonus-reveal{display:grid;grid-template-rows:0fr;transition:grid-template-rows .45s;margin-top:20px}.bonus-reveal.open{grid-template-rows:1fr}.bonus-reveal>div{overflow:hidden}.bonus-reveal label{display:block;font-size:13px}.bonus-reveal textarea{width:100%;min-height:170px;resize:vertical;background:#0b140e;color:#ebf8ef;border:1px solid #577c62;border-radius:5px;padding:20px;font-size:17px;margin-top:12px}.warm{background:#f3eee5;color:#283733;padding:40px;border-radius:12px;max-width:950px;margin:0 auto}.warm .eyebrow{color:var(--wine)}.warm h2{font-family:Georgia,serif;letter-spacing:-1px;font-size:42px}.warm .student-example{padding:25px;margin-top:28px;background:#fffdf8;border:1px solid #dcd8cc;border-radius:15px 15px 15px 0;font-size:19px;line-height:1.8}.warm mark{background:#efd9cc;color:#6c3c30;padding:2px}.teacher-message{margin:22px 0 0 35px;background:#e1eae3;padding:26px;border-radius:16px 16px 0 16px;line-height:1.9;font-size:16px}.teacher-message strong{display:block;color:var(--wine);font-size:13px;margin-bottom:10px}.example-note{font-size:12px;color:#6d776e;margin-top:25px}.results{text-align:center;padding:20px 0 30px;position:relative;overflow:hidden}.results h2{font-size:clamp(38px,6vw,70px)}.result-number{font:clamp(75px,14vw,140px)/1 var(--mono);letter-spacing:-8px;color:var(--green);margin:28px 0 12px}.results .lead{max-width:690px;margin:24px auto;color:#b4c8ba;font-size:17px;line-height:1.8}.result-chips{justify-content:center}.cta-box{max-width:650px;margin:30px auto 0;padding:30px;border:1px solid #47654f;border-radius:10px;background:#152018}.cta-box h3{font-size:24px;font-weight:450;line-height:1.5}.cta-box .primary{margin-top:25px}.share{margin:18px 0}.share-status{font-size:12px;color:#adc8b4;overflow-wrap:anywhere}.confetti{pointer-events:none;position:absolute;inset:0;overflow:hidden}.confetti i{position:absolute;left:var(--x);top:-20px;width:5px;height:10px;background:var(--green);animation:fall 2.2s ease-out both;animation-delay:var(--d)}.confetti i:nth-child(3n){background:var(--cyan)}.confetti i:nth-child(3n+1){background:#d6b883}.ripple{position:absolute;left:50%;top:50%;width:15px;height:15px;border-radius:50%;background:#ffffff60;pointer-events:none;animation:ripple .5s ease-out forwards}.security-note{font:10px var(--mono);color:#88a28f;margin-top:15px}
@keyframes scan{from{top:-100px}to{top:100vh}}@keyframes radar{to{transform:rotate(360deg)}}@keyframes cursor{50%{opacity:0}}@keyframes breathe{50%{box-shadow:0 0 24px #99ffc823}}@keyframes enter{from{opacity:0;transform:translateX(18px)}to{opacity:1;transform:none}}@keyframes shake{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}@keyframes glow{50%{box-shadow:0 0 16px #99ffc849}}@keyframes wave{to{height:29px}}@keyframes fall{to{transform:translateY(500px) rotate(300deg);opacity:0}}@keyframes ripple{to{transform:scale(20);opacity:0}}
.still *, .still *:before,.still *:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.still .scan-line{display:none}.still .confetti{display:none}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.scan-line,.confetti{display:none}}
@media(max-width:900px){.top{padding:22px 24px}.free-tag{display:none}.wrap{padding:0 24px}.lobby-hero{gap:30px}.featured{min-height:490px;padding:20px}.feature-text h2{font-size:45px}.feature-text strong{font-size:68px}.topic-grid{grid-template-columns:repeat(2,1fr)}.human-note{flex-wrap:wrap}.mission-top{padding:20px 24px;flex-wrap:wrap}.mission .intro{gap:30px}.mission h1{letter-spacing:-4px}.audio-grid{grid-template-columns:1fr}.listening-layout{grid-template-columns:1fr}.listening-layout .audio-card{max-width:650px}.audio-grid .audio-card{display:block}.settings{margin-left:auto}.mission-footer{flex-wrap:wrap}.stage-head{gap:15px}}
@media(max-width:600px){.top .text-link{font-size:11px}.top .brand{font-size:20px}.lobby-hero{grid-template-columns:1fr;padding:38px 0 45px}.lobby-hero h1{font-size:48px}.lead{font-size:18px}.featured{min-height:410px;margin:8px 8px 0;transform:rotate(1deg)}.feature-text{padding-top:80px}.mini-radar{width:240px;height:240px}.feature-text h2{font-size:38px}.feature-text strong{font-size:65px}.section-heading{display:block}.section-heading>p{margin-top:15px}.age-tabs{grid-template-columns:repeat(3,1fr);gap:7px}.age-tabs button{font-size:14px;padding:13px 6px}.topic-grid{grid-template-columns:1fr}.topic{min-height:240px}.topic-mark{height:40px}.human-note{gap:25px}.human-note .hand{display:none}.human-note>div{flex-basis:100%}.footer{flex-wrap:wrap;gap:10px;padding-top:22px;padding-bottom:22px}.mission-top{padding:16px 18px;gap:14px}.mission-top .brand{font-size:19px}.mission-top .back-link{margin-left:auto;font-size:11px}.settings{width:100%;margin:0;justify-content:flex-end}.settings button{padding:8px 12px}.progress-shell{padding:12px 18px}.progress-meta{font-size:9px;letter-spacing:1px}.mission-wrap{padding:28px 18px 12px}.mission .intro{grid-template-columns:1fr;gap:26px}.mission h1{font-size:60px}.mission h1 strong{font-size:76px}.intro-copy .lead{font-size:15px}.operation-map{padding:18px}.operation-map .radar{width:210px;margin:20px auto}.stage-head{display:block}.round-count{display:inline-block;padding:10px 15px;min-width:0;font-size:20px;margin-top:18px}.round-count small{display:inline;margin-left:12px}.mission h2{font-size:32px}.transmission{font-size:16px;padding:18px;line-height:2.1}.questions{grid-template-columns:1fr}.question{padding:17px}.q-title{font-size:12px}.choice{font-size:13px;padding:12px;flex-grow:1}.answers{gap:7px}.mission-nav{flex-wrap:wrap;gap:12px}.mission-nav p{flex-basis:100%;order:-1}.mission-nav .primary{margin-left:auto}.bonus-card{padding:22px}.bonus-card blockquote{font-size:17px}.warm{padding:24px 20px}.warm h2{font-size:33px}.warm .student-example{font-size:16px;padding:18px}.teacher-message{margin-left:10px;font-size:14px;padding:20px}.mission-footer{padding:18px;font-size:8px}.cta-box{padding:23px 18px}.cta-box h3{font-size:20px}.results .lead{font-size:15px}.result-number{letter-spacing:-5px}.storage-note{font-size:10px}}