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@media(max-width:620px){.main{padding:0 13px 60px}.hero{grid-template-columns:1fr}.hero-visual{display:none}.hero h1{font-size:31px}.hero p{font-size:13px}.three-stats{grid-template-columns:repeat(3,1fr);gap:7px}.stat{display:block;padding:13px 10px}.stat .val{font-size:24px}.stat .cap{font-size:10px}.stat .symbol{display:none}.panel{padding:16px}.lesson-grid,.library-list,.grid-two{grid-template-columns:1fr}.topbar{gap:7px}.top-actions{gap:5px}.top-actions .status{font-size:0}.top-actions .status .pulse{font-size:12px}.breadcrumbs{font-size:11px}.flashcard{min-height:270px}.setting-row{flex-direction:column;align-items:flex-start}.hero-actions .btn{flex:1}.chat-fab{bottom:13px;right:13px}.chat-drawer{bottom:68px;right:9px}.btn{padding:10px 12px}.lesson-article .topic{padding-left:13px}.sidebar{width:min(270px,80vw)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(ellipse at 50% 8%,rgba(51,116,184,.18),transparent 42%)}.auth-card{width:min(100%,460px);padding:clamp(24px,5vw,42px);border:1px solid var(--line);border-radius:22px;background:rgba(10,19,36,.92);box-shadow:0 24px 90px rgba(0,0,0,.35)}.auth-card>.brand-mark{margin-bottom:24px}.auth-card h1{margin:8px 0}.auth-card form{display:grid;gap:16px;margin:25px 0 14px}.auth-card label{display:grid;gap:8px;color:var(--text);font-size:13px;font-weight:600}.auth-card .field{width:100%;padding:13px 14px}.auth-card form .btn{justify-content:center;padding:13px}.auth-card small,.auth-card .footnote{color:var(--muted);font-size:11px}.auth-error{padding:11px 13px;border-radius:10px;background:rgba(255,95,95,.12);color:#ffabab;font-size:13px}.auth-switch{margin:4px 0 20px}.account-name{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:12px}@media(max-width:700px){.account-name{display:none}.auth-card{padding:24px}}

/* v0.2.1 shared learner progress and profile */
.account-name{border:0;background:transparent;padding:6px 4px;cursor:pointer}.account-name:hover{color:var(--cyan)}
.shared-progress{margin:20px 0 22px}.member-progress-list{display:grid;gap:0}.member-progress-row{display:grid;grid-template-columns:minmax(220px,1fr) minmax(140px,1fr);align-items:center;gap:22px;padding:14px 0;border-top:1px solid var(--stroke)}.member-ident{display:flex;align-items:center;gap:12px;min-width:0}.member-ident>div{min-width:0}.member-ident strong,.member-ident small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.member-ident small{color:var(--muted);margin-top:3px;font-size:11px}.member-avatar{width:38px;height:38px;flex:none;display:grid;place-items:center;border:1px solid rgba(89,218,233,.27);border-radius:12px;background:linear-gradient(145deg,rgba(57,203,231,.17),rgba(117,77,221,.13));color:var(--cyan);font-weight:800}.member-progress-track{height:8px;overflow:hidden;border-radius:9px;background:#263951}.member-progress-track span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#389ec7,#52e5d1)}.you-tag{margin-left:7px;color:var(--cyan);font-size:9px;letter-spacing:.1em}.profile-card{min-height:205px}.profile-field{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid var(--stroke);font-size:13px}.profile-field:first-of-type{margin-top:10px}.profile-field span{color:var(--muted)}.profile-field strong{text-align:right;overflow-wrap:anywhere}
@media(max-width:620px){.member-progress-row{grid-template-columns:1fr;gap:9px}.member-progress-track{margin-left:50px}.profile-field{align-items:flex-start;flex-direction:column;gap:2px}.profile-field strong{text-align:left}}

/* v3.0.8 focused lesson flow: distinguish instruction, hands-on practice, and assessment */
.lesson-tabs{display:flex;gap:8px;padding:6px;border:1px solid var(--stroke);border-radius:13px;background:rgba(8,15,26,.75);margin-bottom:15px}.lesson-tab{display:flex;align-items:center;gap:8px;min-height:42px;padding:8px 13px;border:1px solid transparent;border-radius:9px;background:transparent;color:var(--muted);font-size:12px;font-weight:800}.lesson-tab:hover{color:var(--text);background:rgba(104,147,188,.08)}.lesson-tab.active{color:var(--text);border-color:rgba(104,179,214,.3);background:linear-gradient(120deg,rgba(132,85,210,.22),rgba(25,143,157,.17));box-shadow:inset 0 0 18px rgba(69,162,194,.06)}.lesson-tab svg{color:var(--cyan)}.tab-count{font-size:10px;color:var(--cyan);border:1px solid var(--stroke);padding:2px 7px;border-radius:12px}.lesson-material,.lesson-lab{min-height:250px}.lesson-material>.eyebrow,.lesson-lab>.eyebrow{margin-bottom:12px}.lesson-next-hint{border-left:3px solid var(--violet);border-radius:0 8px 8px 0;background:rgba(152,111,230,.09);padding:11px 13px;color:#c9c4dd;font-size:12px;margin-top:15px}.lesson-lab h2{font-size:23px}.lesson-quiz-cta{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:19px 21px;margin-top:17px;border-radius:15px;border:1px solid rgba(86,205,218,.34);background:radial-gradient(ellipse at 0% 0%,rgba(30,152,180,.15),transparent 65%),linear-gradient(130deg,#15223a,#101a29);box-shadow:var(--shadow)}.lesson-quiz-cta strong{display:block;font:700 22px var(--display);margin-top:4px}.lesson-quiz-cta p{font-size:12px;color:var(--muted);margin-top:3px}.lesson-quiz-cta .btn{flex-shrink:0;min-height:46px}.lesson-footer-actions{display:flex;gap:9px;justify-content:flex-end;flex-wrap:wrap;margin-top:12px}.rationale{display:grid;gap:7px;padding:14px 16px;border-radius:11px;border:1px solid rgba(92,184,210,.24);background:linear-gradient(130deg,rgba(22,77,94,.22),rgba(31,40,65,.55));color:#d5e1ef;font-size:13px;line-height:1.7}.rationale>strong{font:800 10px var(--font);letter-spacing:.15em;text-transform:uppercase;color:var(--cyan)}.rationale b{color:#d6c2ff}
@media(max-width:620px){.lesson-tabs{display:grid;grid-template-columns:1fr 1fr}.lesson-tab{justify-content:center;padding:8px 5px;font-size:11px}.lesson-quiz-cta{align-items:stretch;flex-direction:column}.lesson-quiz-cta .btn{width:100%;justify-content:center}.lesson-footer-actions{justify-content:stretch}.lesson-footer-actions .btn{flex:1}}