:root{--dark:#081c38;--bg:#edf5fb;--teal:#00aa9e;--ink:#11304c;--muted:#526d83;--line:#d7e6f0;--blue:#176cc4}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);line-height:1.5}button,input{font:inherit}button{cursor:pointer}a{color:inherit}.sitewidth{max-width:1190px;margin:auto;padding:0 25px}.skip{position:absolute;top:-60px;left:12px;background:white;z-index:20;padding:9px}.skip:focus{top:5px}
.site-head{min-height:75px;background:#08192f;color:#d8e7f3;display:flex;justify-content:space-between;align-items:center;padding:9px max(22px,calc((100vw - 1140px)/2));gap:22px}.brand img{display:block;width:145px;height:auto}.site-head nav{display:flex;flex-wrap:wrap;gap:10px 25px}.site-head nav a{text-decoration:none;font-weight:700;font-size:13px}.site-head nav a:hover,.site-head nav a:focus-visible{color:#7bf7dd}
.hero{background:radial-gradient(ellipse at 80% 15%,#116e88 0%,transparent 40%),linear-gradient(125deg,#081a33,#092949 65%,#07304a);color:white;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.7fr 1fr;align-items:center;gap:15px;min-height:336px}.eyebrow{font-size:12px;letter-spacing:.12em;font-weight:850;color:#13afac}.hero .eyebrow{color:#7ef7da}.hero h1{font-size:clamp(34px,4.7vw,59px);line-height:1.08;letter-spacing:-.04em;margin:13px 0 13px}.hero h1 em{color:#8cffd3;font-style:normal}.hero p{max-width:670px;color:#d4e5ef;font-size:16px;line-height:1.65}.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.hero-tags span{border:1px solid #3d7c92;color:#d1f5ed;padding:6px 11px;border-radius:30px;font-size:12px;font-weight:600}.robot-art{min-height:280px;position:relative;display:flex;justify-content:center;align-items:center}.robot-art img{width:min(245px,85%);max-height:290px;object-fit:contain;filter:drop-shadow(0 18px 32px #0009)}.speech{position:absolute;right:-3px;top:22px;background:#fff;border:2px solid #a1f9e5;color:#17435d;font-size:12px;padding:11px 13px;border-radius:15px;box-shadow:0 10px 22px #0004}.speech b{color:#167b70}
.choose{padding:34px 0 25px}.choose h2{font-size:clamp(24px,3vw,33px);margin:5px 0 19px}.track-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.track-tabs button{background:#fff;border:2px solid var(--line);border-radius:18px;padding:15px;display:grid;grid-template-columns:50px 1fr;grid-template-rows:auto auto;gap:0 8px;text-align:left;box-shadow:0 6px 20px #14476d0c;min-height:83px;color:var(--ink)}.track-tabs button>span{font-size:29px;grid-row:span 2;align-self:center}.track-tabs button b{font-size:18px;align-self:end}.track-tabs button small{font-size:12px;color:#527084}.track-tabs button[aria-pressed=true]{border-color:#00ac99;background:#e7fffa;box-shadow:0 0 0 3px #b7eee3}.track-tabs button:focus-visible{outline:3px solid #146cd0;outline-offset:3px}
.lesson{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(270px,1fr);gap:18px;align-items:start;margin-bottom:24px}.lesson-main,.path-info{background:white;border:1px solid var(--line);border-radius:25px;box-shadow:0 8px 30px #1d507011;overflow:hidden}.lesson-main{padding:26px}.lesson-top{display:flex;align-items:start;justify-content:space-between;gap:15px}.lesson-top h2{margin:7px 0;font-size:27px}.lesson-top p{margin:0 0 18px;color:var(--muted);max-width:660px}.lesson-status{border-radius:28px;background:#e5f5f2;color:#007f75;font-size:12px;font-weight:800;white-space:nowrap;padding:7px 10px}.lesson-progress{height:7px;border-radius:8px;background:#e5eff5;overflow:hidden;margin:5px 0 27px}.lesson-progress>span{height:100%;display:block;background:linear-gradient(90deg,#00b29c,#3bc5ef);width:0%;transition:width .2s}
.q-label{font-size:12px;letter-spacing:.1em;color:#0b8a80;font-weight:850;margin-bottom:8px}.challenge-title{font-size:20px;line-height:1.48;margin:4px 0 16px}.challenge-note{font-size:13px;color:var(--muted);margin-bottom:18px}.choice-stack{display:grid;gap:10px;margin-bottom:20px}.choice{display:flex;align-items:center;gap:10px;text-align:left;min-height:51px;border:1.5px solid #d5e3ee;background:#f8fbfe;border-radius:13px;padding:12px 13px;color:#16314b}.choice strong{width:28px;height:28px;border-radius:9px;background:#e8f2f8;display:grid;place-items:center;font-size:12px}.choice[aria-pressed=true]{border-color:#009e90;background:#e8fffa}.choice:focus-visible{outline:2px solid #146cd0;outline-offset:2px}.answer-input{width:100%;max-width:500px;border:2px solid #c6dce9;background:#f9fdff;border-radius:13px;padding:13px;font-size:17px;color:#0d2f4a}.answer-input:focus{border-color:#0d998e;outline:none;box-shadow:0 0 0 3px #c6f4ec}.picture{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:14px;border:1px solid #bdd8e7;max-height:400px}.pic-hint{display:block;font-size:12px;color:#5c788b;margin:8px 0 20px}
.lesson-actions{display:flex;flex-wrap:wrap;gap:10px;margin:21px 0 0}.btn{border:0;border-radius:13px;padding:12px 19px;background:linear-gradient(125deg,#008e83,#086da3);color:white;font-weight:850;text-decoration:none;display:inline-block;min-height:47px;text-align:center}.btn:hover{filter:brightness(1.09)}.btn:focus-visible{outline:3px solid #1b6cc0;outline-offset:2px}.btn-secondary{background:#e4f0f6;color:#17435d}.btn[disabled]{opacity:.43;cursor:not-allowed}
.coach{display:grid;grid-template-columns:69px 1fr;gap:14px;border-radius:17px;background:#effcf9;border:1px solid #9edccf;padding:17px;margin-top:17px;color:#174b52}.coach[hidden]{display:none}.coach img{width:62px;height:62px;object-fit:contain}.coach strong{font-size:16px}.coach p{margin:7px 0;font-size:14px}.coach .line{margin:7px 0 0;font-size:13px}.coach .line b{color:#086e70}.coach.fail{background:#fff8ec;border-color:#edcc9b;color:#563e25}.coach.fail .line b{color:#80531c}
.path-info{padding:25px}.path-info h3{font-size:22px;margin:8px 0}.path-info p{color:var(--muted);font-size:14px}.path-link{display:flex;justify-content:space-between;gap:12px;align-items:center;text-decoration:none;background:#f3f9fd;padding:16px 13px;border-radius:13px;border:1px solid #dbeaf3;margin-top:11px;font-weight:700;color:#144c6a}.path-link span{color:#1c9784}.path-link:hover{border-color:#00a99b;background:#edfffb}.path-link.primary{background:#0c6375;color:white}.path-link.primary span{color:#a4ffe2}.local-privacy{margin-top:22px;padding-top:15px;border-top:1px solid var(--line)}.reset{border:0;padding:0;background:none;font-size:12px;color:#486b83;text-decoration:underline;text-align:left}.trust{display:flex;align-items:center;gap:14px;margin:17px 0 33px;color:#47617a}.trust>span{font-size:27px;color:#159c91}.trust p{font-size:13px;margin:0}.footer{border-top:1px solid #d2e4ef;display:flex;justify-content:space-between;gap:20px;padding-top:20px;padding-bottom:28px;font-size:12px;color:#637b8b}
.rover-board{border-radius:20px;overflow:hidden;background:linear-gradient(155deg,#123f61,#0d2945);padding:20px;color:white;margin-bottom:18px}.rover-stage{display:flex;justify-content:space-between;align-items:center;position:relative;gap:10px;min-height:135px;overflow:hidden}.rover-stage:after{content:"";height:5px;position:absolute;left:0;right:0;bottom:14px;background:#71e4b4;border-radius:3px;opacity:.7}.rover-sprite{display:grid;place-items:center;font-size:64px;transition:transform .42s ease;position:relative;z-index:2;filter:drop-shadow(0 7px 6px #0007)}.rover-sprite.move{transform:translateX(95px)}.rover-sprite.fail{transform:rotate(-13deg)}.rover-destination{font-size:17px;text-align:center;color:#a5f4e8}.rover-load{display:flex;align-items:center;flex-wrap:wrap;gap:13px;background:#f7fbfd;border:1px solid #dbe9f0;padding:17px;border-radius:14px}.rover-load input{flex:1;min-width:150px;accent-color:#00a593}.rover-load output{min-width:67px;text-align:center;font-size:24px;font-weight:800;color:#007e73}.rover-caption{font-size:13px;color:#597588;margin:10px 0}.speaking-box{margin:15px 0;border:1px solid #c7e7db;background:#f0fff9;border-radius:14px;padding:17px}.speaking-box strong{color:#087b6a}.speaking-box p{font-size:17px;color:#173955}.speaking-box small{font-size:12px;color:#597886}.done-art{font-size:48px;margin:5px 0}.done-box{background:#f1fcf8;border:1px solid #b7e8d8;border-radius:18px;padding:24px}.done-box h3{font-size:25px;margin:7px 0}.done-box p{color:#456c73}
@media(max-width:900px){.lesson{grid-template-columns:1fr}.hero-grid{grid-template-columns:1fr 190px}.speech{display:none}}
@media(max-width:690px){.sitewidth{padding:0 15px}.site-head{padding:10px 16px;align-items:flex-start;flex-direction:column;gap:7px}.site-head nav{gap:8px 17px}.hero-grid{display:flex;align-items:center;min-height:0;padding-top:28px;padding-bottom:24px}.hero h1{font-size:34px}.hero p{font-size:14px}.robot-art{display:none}.hero-tags{margin:12px 0}.track-tabs{grid-template-columns:1fr;gap:9px}.track-tabs button{min-height:63px;padding:10px 14px}.track-tabs button>span{font-size:25px}.lesson-main,.path-info{padding:19px;border-radius:19px}.lesson-top h2{font-size:23px}.coach{grid-template-columns:46px 1fr;padding:12px;gap:9px}.coach img{width:44px;height:44px}.footer{display:block}.rover-sprite{font-size:50px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.rover-sprite,.lesson-progress>span{transition:none}}