:root{--bg:#f7f6f1;--ink:#183d36;--muted:#60716b;--green:#174d43;--soft:#e9eee8;--line:#dde2da;--sand:#ece0c4;--amber:#8c6227;--white:#fffefa;--radius:22px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button,a,input,textarea{touch-action:manipulation}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}a{color:var(--green)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid 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p{font-size:12px;color:#6b7c62}.tutor-card textarea{min-height:90px;font-size:12px;padding:10px;background:#f8f9f2}.tutor-card .button{padding:11px 14px;font-size:12px;min-height:42px;width:100%;margin-top:10px}.tutor-answer{white-space:pre-wrap;font-size:13px;line-height:1.8;border-top:1px solid #d5dec9;padding-top:15px;margin-top:18px}.feedback{border:1px solid #cddcbf;background:#eff4e7;border-radius:14px;padding:22px;margin-bottom:23px}.feedback h3{font-size:19px;font-weight:550;margin-bottom:10px}.feedback p{font-size:14px;margin-bottom:13px;color:#526c49}.feedback .example{font-size:16px;color:#274b2c;background:#fffef7;padding:16px;border-radius:10px;line-height:1.8;white-space:pre-wrap}.help-box{background:#f6efde;border:1px solid #e5d7b9;border-radius:12px;padding:18px;font-size:13px;line-height:1.7;margin-bottom:22px;color:#74603c}.record-controls{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.record-note{font-size:12px;color:#7a846e;line-height:1.7}.recording{color:#a34635;font-size:12px}.record-audio{width:100%;margin:12px 0}.finish-card{max-width:670px;margin:40px auto;text-align:center;padding:50px 35px}.finish-mark{font-size:32px;color:#6f8d5e;width:73px;height:73px;display:flex;align-items:center;justify-content:center;background:#e7eedf;border-radius:50%;margin:0 auto 26px}.finish-card h1{font-size:38px}.finish-card p{font-size:14px;color:#6c7c62}.finish-card .actions{justify-content:center;margin-top:25px}.notice{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:#244c3c;color:#fffdf5;border-radius:12px;padding:15px 22px;box-shadow:0 8px 35px #263d3029;max-width:min(90vw,620px);font-size:13px;line-height:1.6;z-index:20}.notice.error{background:#754d30}.loading{display:flex;align-items:center;justify-content:center;gap:15px;padding:80px 15px;color:#6b7b62;font-size:14px}.loader{width:18px;height:18px;border:2px solid #cad6c0;border-top-color:#527746;border-radius:50%;animation:spin .8s linear infinite}.skip{position:fixed;left:12px;top:-60px;z-index:40;background:#fff;padding:12px}.skip:focus{top:12px}dialog{border:1px solid var(--line);border-radius:20px;padding:30px;max-width:min(90vw,500px);color:var(--ink);background:var(--white)}dialog::backdrop{background:#183d3655}dialog h2{font-size:27px}dialog p{font-size:14px;color:#6b7b62}details{margin:15px 0;font-size:12px;color:#6a7c60}summary{cursor:pointer;line-height:1.7}details p{margin:10px 0 0}audio{max-width:100%}[hidden]{display:none!important}@keyframes spin{to{transform:rotate(360deg)}}@media(min-width:1600px){.workspace{padding:0 85px}.hero{padding-top:45px;padding-bottom:48px}}@media(max-width:1160px){.sidebar{width:210px;padding-left:20px;padding-right:20px}.workspace{margin-left:210px;padding:0 30px}.session-layout{grid-template-columns:1fr}.tutor-card{max-width:none}.journey-art{height:300px}.hero{gap:25px}h1{font-size:44px}}@media(max-width:760px){.shell{display:block}.sidebar{position:static;width:100%;padding:17px 20px 0;background:var(--bg);border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:13px}.brand-symbol{font-size:39px;width:29px}.brand-symbol span{font-size:20px}.brand small{font-size:8px}.sidebar-note,.local-status{display:none}nav{display:flex;justify-content:space-between;gap:2px;margin-top:18px}.nav{font-size:11px;padding:12px 9px;border-radius:8px 8px 0 0;display:block;white-space:nowrap}.nav>span{display:none}.workspace{margin-left:0;padding:0 22px}.topbar{height:65px;font-size:11px}.connection{font-size:9px;padding:6px 9px}main{padding-top:25px}.hero{grid-template-columns:1fr;padding:20px 0 30px}.hero h1{font-size:42px;max-width:420px}.hero-description{font-size:14px;max-width:380px}.journey-art{display:none}.welcome-line{font-size:12px;margin-bottom:18px}.home-grid{grid-template-columns:1fr}.card{padding:23px}.section-heading h2{font-size:20px}.section-heading>span{font-size:10px}.page-footer{font-size:9px;gap:8px;line-height:1.7}.page-title{font-size:33px}.route-item{padding:20px;gap:16px}.route-level{width:47px;font-size:23px}.unit-list,.skills-grid{grid-template-columns:1fr}.stats-grid{gap:8px}.stat-card{padding:14px}.stat-card strong{font-size:30px}.stat-card p{font-size:10px}.session-header h1{font-size:27px}.session-header .actions{gap:15px}.session-header{gap:10px}.activity-card{padding:23px}.activity-card h2{font-size:25px}.source{font-size:15px;padding:17px}.tutor-card{padding:22px}.button{font-size:13px;padding:14px 20px}.finish-card{padding:32px 22px;margin:10px auto}.finish-card h1{font-size:32px}.finish-card .actions .button{width:100%}.evidence-row{align-items:flex-start;flex-direction:column;gap:8px}.activity-tools{gap:13px}.notice{font-size:12px;bottom:14px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Home-screen access */
.install-tutor{display:grid;grid-template-columns:76px 1fr;align-items:start;gap:24px;margin:24px clamp(24px,4.5vw,64px) 32px;padding:28px;max-width:1050px;border:1px solid #dddfd3;border-radius:26px;background:#f0f2e9;scroll-margin:24px}
.install-tutor[hidden],.install-help[hidden]{display:none}
.install-tutor img{border-radius:20px;box-shadow:0 6px 18px #123e3212}
.install-tutor h2{margin:0 0 7px;font-size:23px;line-height:1.25;color:#174d43}
.install-tutor p{margin:0 0 15px;font-size:14px;line-height:1.65;color:#656e63}
.install-help{max-width:580px;margin-top:18px;border-top:1px solid #d8ddcd;padding-top:16px}
.install-help p{margin:0;font-size:14px;color:#405b4c}
@media(max-width:760px){.install-tutor{grid-template-columns:60px 1fr;gap:17px;margin:20px 0 30px;padding:22px 18px}.install-tutor img{width:60px;height:60px;border-radius:16px}.install-tutor h2{font-size:21px}.install-tutor .button{padding:12px 14px;font-size:12px}.install-help{margin-left:-77px;padding-top:17px}}