:root{
  color-scheme:dark;
  --bg:#080d12;--surface:#111923;--surface-2:#182330;--surface-3:#22303e;--ink:#f5f8fc;--muted:#c1ccda;--line:#354657;
  --accent:#2f6fe4;--accent-ink:#fff;--accent-soft:#162c52;--green:#40b989;--green-soft:#102d24;--amber:#e4a84a;--amber-soft:#302511;
  --red:#ef6b74;--red-soft:#35181d;--radius:18px;--radius-sm:12px;--shadow:0 22px 60px rgba(0,0,0,.28);--max:1180px;
  --font:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
:root[data-theme="light"]{color-scheme:light;--bg:#f5f7f9;--surface:#fff;--surface-2:#eef2f6;--surface-3:#e8edf2;--ink:#111820;--muted:#687382;--line:#dde3e9;--accent:#2f6fe4;--accent-soft:#eef5ff;--green:#2d9c72;--green-soft:#e9f8f1;--amber:#b7791f;--amber-soft:#fff6df;--red:#d44c55;--red-soft:#fff0f1;--shadow:0 18px 50px rgba(30,38,50,.08)}
*{box-sizing:border-box}html{background:var(--bg)}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.45;-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}button{cursor:pointer}.boot{height:100vh;display:grid;place-content:center;gap:20px}.mark{width:52px;height:52px;border-radius:16px;background:var(--ink);color:var(--bg);display:grid;place-content:center;font-weight:800;font-size:24px}.boot-line{height:3px;width:52px;border-radius:99px;background:linear-gradient(90deg,var(--accent) 0 45%,var(--line) 45%)}
a{color:inherit;text-decoration:none}.shell{min-height:100vh}.topbar{position:sticky;top:0;z-index:30;height:68px;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(20px);border-bottom:1px solid var(--line)}.top-inner{max-width:var(--max);height:100%;margin:auto;padding:0 24px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;font-weight:760;letter-spacing:-.02em}.brand-mark{width:30px;height:30px;border-radius:9px;background:var(--ink);color:var(--bg);display:grid;place-content:center;font-size:14px}.desktop-nav{display:flex;gap:4px;margin-left:26px}.nav-link{padding:9px 12px;border-radius:10px;color:var(--muted);font-weight:620}.nav-link:hover,.nav-link.active{background:var(--surface-2);color:var(--ink)}.top-spacer{flex:1}.icon-btn{border:0;background:transparent;color:var(--muted);width:38px;height:38px;border-radius:11px;display:grid;place-content:center}.icon-btn:hover{background:var(--surface-2);color:var(--ink)}.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#72a6ff);color:white;display:grid;place-content:center;font-size:12px;font-weight:750}
.main{max-width:var(--max);margin:0 auto;padding:38px 24px 110px}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:28px}.eyebrow{font-size:12px;font-weight:760;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(29px,4vw,44px);line-height:1.04;letter-spacing:-.045em;margin-bottom:10px}h2{font-size:22px;letter-spacing:-.025em;margin-bottom:14px}h3{font-size:17px;letter-spacing:-.01em;margin-bottom:8px}.sub{color:var(--muted);max-width:680px;margin:0}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:1.35fr .65fr}.grid-3{grid-template-columns:repeat(3,1fr)}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 0 rgba(255,255,255,.04)}.card.soft{background:var(--surface-2);border-color:transparent}.hero{padding:28px;min-height:250px;position:relative;overflow:hidden;background:linear-gradient(145deg,var(--surface),color-mix(in srgb,var(--accent-soft) 70%,var(--surface)));display:flex;flex-direction:column;justify-content:space-between}.hero:after{content:"";position:absolute;width:250px;height:250px;border-radius:50%;right:-85px;top:-100px;border:42px solid color-mix(in srgb,var(--accent) 10%,transparent)}.hero-main{position:relative;z-index:1}.hero-title{font-size:34px;line-height:1.06;max-width:600px;letter-spacing:-.04em;margin:6px 0 12px}.hero-actions{display:flex;gap:10px;align-items:center;position:relative;z-index:1}.btn{border:0;border-radius:12px;padding:11px 16px;background:var(--ink);color:var(--bg);font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px}.btn:hover{transform:translateY(-1px)}.btn.primary{background:var(--accent);color:white}.btn.secondary{background:var(--surface-2);color:var(--ink)}.btn.ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}.btn.danger{background:var(--red-soft);color:var(--red)}.btn.wide{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.stat{background:var(--surface);border:1px solid var(--line);border-radius:15px;padding:16px}.stat-num{font-weight:780;font-size:24px;letter-spacing:-.04em}.stat-label{font-size:12px;color:var(--muted);margin-top:2px}.progress{height:7px;background:var(--surface-3);border-radius:99px;overflow:hidden}.progress>i{display:block;height:100%;background:var(--accent);border-radius:99px}.stack{display:flex;flex-direction:column;gap:12px}.row{display:flex;align-items:center;gap:12px}.between{justify-content:space-between}.muted{color:var(--muted)}.small{font-size:12px}.pill{display:inline-flex;align-items:center;gap:6px;border-radius:99px;padding:6px 9px;background:var(--surface-2);font-size:12px;font-weight:650;color:var(--muted)}.pill.good{color:var(--green);background:var(--green-soft)}.pill.warn{color:var(--amber);background:var(--amber-soft)}.pill.bad{color:var(--red);background:var(--red-soft)}.dot{width:7px;height:7px;border-radius:50%;background:currentColor}
.module{margin:28px 0 10px}.unit-list{display:flex;flex-direction:column;gap:9px}.unit{display:grid;grid-template-columns:42px 1fr auto;gap:14px;align-items:center;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:14px;transition:.16s ease}.unit:hover:not(.locked){border-color:color-mix(in srgb,var(--accent) 45%,var(--line));transform:translateY(-1px)}.unit-icon{width:42px;height:42px;border-radius:12px;background:var(--surface-2);display:grid;place-content:center;font-weight:760}.unit.done .unit-icon{background:var(--green-soft);color:var(--green)}.unit.current .unit-icon{background:var(--accent-soft);color:var(--accent)}.unit.locked{opacity:.62}.unit-title{font-weight:690}.unit-meta{font-size:12px;color:var(--muted);margin-top:2px}.chev{font-size:20px;color:var(--muted)}
.lesson-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:26px}.lesson-body{min-width:0}.lesson-side{position:sticky;top:94px;align-self:start}.content-block{margin-bottom:26px}.prose{font-size:17px;line-height:1.7}.prose p{margin:0 0 16px}.callout{padding:18px;border-radius:14px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 20%,transparent)}.media-frame{aspect-ratio:16/9;border-radius:18px;background:#101318;overflow:hidden;display:grid;place-content:center;color:white;position:relative}.media-frame video{width:100%;height:100%;object-fit:cover}.media-placeholder{text-align:center;color:#aeb7c2}.lesson-media-image{margin-left:0;margin-right:0}.lesson-media-image img{display:block;width:100%;height:auto;max-height:520px;object-fit:contain;border-radius:12px;background:var(--soft)}.lesson-media-image figcaption{margin-top:10px}.media-play{width:60px;height:60px;border-radius:50%;background:white;color:#111;display:grid;place-content:center;margin:0 auto 12px}.toc .toc-item{padding:10px 0;border-bottom:1px solid var(--line);display:flex;gap:9px;align-items:center}.toc .toc-item:last-child{border:0}.check{width:20px;height:20px;border:1.5px solid var(--line);border-radius:50%;display:grid;place-content:center;font-size:10px}.check.done{border-color:var(--green);background:var(--green);color:white}
.question{max-width:760px;margin:auto}.q-number{color:var(--muted);font-size:13px;margin-bottom:8px}.q-title{font-size:24px;line-height:1.3;letter-spacing:-.025em;margin-bottom:22px}.options{display:flex;flex-direction:column;gap:10px}.option{border:1px solid var(--line);border-radius:14px;padding:14px 16px;background:var(--surface);display:flex;align-items:flex-start;gap:11px;cursor:pointer}.option:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}.option.selected{border-color:var(--accent);background:var(--accent-soft)}.radio{width:20px;height:20px;border:1.5px solid var(--line);border-radius:50%;margin-top:1px;flex:none}.selected .radio{border:6px solid var(--accent)}.answer-input{width:100%;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--ink);padding:14px;outline:none}.answer-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 12%,transparent)}textarea.answer-input{min-height:140px;resize:vertical}.attempt-bar{position:sticky;bottom:18px;max-width:760px;margin:28px auto 0;padding:10px;background:color-mix(in srgb,var(--surface) 90%,transparent);backdrop-filter:blur(16px);border:1px solid var(--line);border-radius:16px;display:flex;justify-content:space-between;gap:10px;box-shadow:var(--shadow)}
.empty{text-align:center;padding:48px 20px}.empty-icon{width:50px;height:50px;border-radius:15px;background:var(--surface-2);display:grid;place-content:center;margin:0 auto 14px;font-size:22px}.list-item{padding:14px 0;border-bottom:1px solid var(--line)}.list-item:last-child{border:0}.skeleton{height:16px;border-radius:8px;background:linear-gradient(90deg,var(--surface-2),var(--surface-3),var(--surface-2));background-size:200% 100%;animation:sh 1.3s linear infinite}@keyframes sh{to{background-position:-200% 0}}.toast{position:fixed;right:22px;bottom:22px;z-index:100;background:var(--ink);color:var(--bg);padding:12px 16px;border-radius:12px;box-shadow:var(--shadow);max-width:360px}.error-banner{padding:14px 16px;border-radius:13px;background:var(--red-soft);color:var(--red);margin-bottom:18px}.auth{min-height:100vh;display:grid;place-content:center;padding:24px}.auth-card{width:min(440px,calc(100vw - 32px));background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow)}.auth-logo{display:flex;align-items:center;gap:12px;margin-bottom:28px}.auth-logo .brand-mark{width:40px;height:40px;border-radius:12px}.field{display:flex;flex-direction:column;gap:7px;margin:14px 0}.field label{font-size:12px;font-weight:700;color:var(--muted)}.field input,.field select{height:44px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink);padding:0 12px;outline:none}.field input:focus,.field select:focus{border-color:var(--accent)}
.bottom-nav{display:none}.mobile-only{display:none}
@media(max-width:860px){.desktop-nav{display:none}.main{padding:26px 16px 94px}.top-inner{padding:0 16px}.grid-2,.grid-3,.lesson-grid{grid-template-columns:1fr}.lesson-side{position:static}.hero{min-height:230px}.stat-row{grid-template-columns:repeat(3,1fr)}.bottom-nav{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);z-index:40;bottom:0;left:0;right:0;padding:7px 8px calc(7px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(22px);border-top:1px solid var(--line)}.bottom-nav a{height:48px;border-radius:11px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);font-size:10px;gap:2px}.bottom-nav a.active{color:var(--accent);background:var(--accent-soft)}.nav-ico{font-size:18px}.page-head{align-items:flex-start}.mobile-only{display:block}.desktop-only{display:none}.toast{bottom:78px;left:16px;right:16px}.hero-title{font-size:29px}.card{padding:18px}.lesson-grid{gap:18px}}
@media(max-width:520px){.stat-row{gap:7px}.stat{padding:12px}.stat-num{font-size:20px}.hero{padding:22px}.hero-actions{flex-direction:column;align-items:stretch}.unit{grid-template-columns:38px 1fr auto;padding:12px}.unit-icon{width:38px;height:38px}.attempt-bar{bottom:72px}.topbar{height:60px}}
/* Product RC — rich assessment interactions */
.matching-grid,.compound{display:grid;gap:12px}.match-row,.compound-part{display:grid;gap:9px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.match-select,.table-input{width:100%;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);padding:10px 12px;outline:none}.match-select:focus,.table-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 12%,transparent)}
.ordering{display:grid;gap:9px}.order-row{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:10px;padding:12px 14px;border:1px solid var(--line);border-radius:13px;background:var(--surface)}.drag-handle{color:var(--muted);font-size:18px}.order-actions{display:flex;gap:5px}.order-actions .icon-btn{width:34px;height:34px}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px}.answer-table{width:100%;border-collapse:collapse;min-width:480px}.answer-table th,.answer-table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}.answer-table th{font-size:12px;color:var(--muted);background:var(--soft)}.answer-table tr:last-child td{border-bottom:0}
.question-image{border:1px solid var(--line);border-radius:16px;padding:12px;margin-bottom:16px;background:var(--soft)}.question-image img{display:block;width:100%;height:auto;max-height:420px;object-fit:contain;border-radius:10px}.question-image figcaption{margin-top:8px}.image-placeholder{min-height:160px;display:grid;place-items:center;border-radius:10px;background:linear-gradient(135deg,var(--accent-soft),var(--surface));color:var(--muted);font-size:13px}
.exam-clock{font-variant-numeric:tabular-nums}.exam-clock.urgent{color:var(--red);border-color:color-mix(in srgb,var(--red) 28%,var(--line));background:var(--red-soft)}
.persona-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin:18px 0}.persona{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--surface);cursor:pointer;text-align:left;color:var(--ink)}.persona:hover{border-color:var(--accent)}
@media(max-width:600px){.match-row{padding:12px}.persona-grid{grid-template-columns:1fr}.order-row{grid-template-columns:22px 1fr auto}.order-actions .icon-btn{width:32px;height:32px}}
.conversation-layout{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(250px,.7fr);gap:18px}.conversation{display:grid;gap:10px;max-height:52vh;overflow:auto;margin-bottom:16px;padding:2px}.message{max-width:82%;padding:11px 13px;border:1px solid var(--line);border-radius:14px;background:var(--soft)}.message.mine{margin-left:auto;background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 24%,var(--line))}.message.ai-pending{background:var(--surface);border-style:dashed}.thinking-dot{width:9px;height:9px;border-radius:50%;background:var(--accent);display:inline-block;animation:shire-pulse 1.2s ease-in-out infinite}@keyframes shire-pulse{0%,100%{opacity:.35;transform:scale(.8)}50%{opacity:1;transform:scale(1)}}.empty.compact{padding:30px 10px}.copy-row{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:10px}
@media(max-width:760px){.conversation-layout{grid-template-columns:1fr}.copy-row{grid-template-columns:1fr}}
.unit.locked{pointer-events:none;cursor:default}

/* Keep conversational tools usable in the narrow Telegram Mini App frame. */
.conversation-layout,.conversation-layout>*{min-width:0}.message{overflow-wrap:anywhere}.icon-btn svg{width:18px;height:18px;display:block;stroke:currentColor}.empty-icon svg{width:22px;height:22px;display:block;stroke:currentColor}
.icon-btn[aria-label="Управление"]{width:auto;min-width:38px;padding:0 12px;display:inline-flex;align-items:center;justify-content:center;gap:7px;font-size:0}.icon-btn[aria-label="Управление"]::before{content:"⚙";font-size:17px;line-height:1}.icon-btn[aria-label="Управление"]::after{content:"Управление";font-size:13px;font-weight:650;line-height:1}
@media(max-width:760px){.conversation-layout{grid-template-columns:minmax(0,1fr)}.conversation-layout .row.between{align-items:stretch;flex-wrap:wrap}.conversation-layout .row.between>.small{flex:1 1 100%}.conversation-layout .row.between>.row{margin-left:auto;flex-wrap:wrap;justify-content:flex-end}}
@media(max-width:520px){.top-inner{gap:10px}.icon-btn[aria-label="Управление"]{width:38px;padding:0}.icon-btn[aria-label="Управление"]::after{display:none}.page-head{align-items:flex-start;flex-wrap:wrap;margin-bottom:22px}.page-head>div{min-width:0}.page-head>.pill{margin-left:0}.conversation-layout .row.between>.row{width:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px}.conversation-layout .row.between>.row .btn{width:100%;min-width:0;padding-inline:10px;line-height:1.2}}

/* Assessment and compact-mobile pass: these rules intentionally override the early RC shell. */
body{font-size:16px}button{color:inherit}.btn{white-space:normal}.option,.option span{color:var(--ink)}.option{min-height:58px;text-align:left;line-height:1.35}.option:focus-visible,.attempt-control:focus-visible,.drag-handle:focus-visible,.question-image-open:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 58%,transparent);outline-offset:3px}.back-link{display:inline-flex;align-items:center;gap:8px;min-height:38px;margin:0 0 14px;color:var(--muted);font-size:14px;font-weight:700}.back-link:hover{color:var(--ink)}.attempt-page-head{margin-bottom:18px}.attempt-bar{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;padding:8px;gap:8px;max-width:760px}.attempt-bar--review{grid-template-columns:repeat(2,minmax(0,1fr))}.attempt-control{display:grid;place-items:center;min-height:48px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);color:var(--ink);font-size:24px;font-weight:750;line-height:1;text-decoration:none}.attempt-control:hover{border-color:var(--accent);background:var(--accent-soft)}.attempt-next{background:var(--accent);border-color:var(--accent);color:#fff}.attempt-control:disabled{opacity:.38;cursor:not-allowed}.question-image{padding:10px;background:var(--surface);overflow:hidden}.question-image-open{display:block;width:100%;padding:0;border:0;background:transparent;cursor:zoom-in}.question-image img{max-height:480px;min-height:170px;background:var(--surface-2);object-fit:contain}.question-image figcaption{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:7px 3px 0}.image-expand-link{border:0;background:transparent;color:var(--accent);font-weight:700;padding:4px 0;cursor:pointer}.image-loading,.image-recovery{min-height:180px;display:flex;align-items:center;justify-content:center;gap:10px;text-align:center}.image-recovery{justify-content:space-between;padding:20px}.media-lightbox{position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:24px;background:rgba(4,7,11,.86);backdrop-filter:blur(8px)}.media-lightbox img{display:block;max-width:min(100%,1100px);max-height:calc(100dvh - 48px);border-radius:14px;background:#fff;object-fit:contain}.media-lightbox-close{position:fixed;right:18px;top:18px;width:44px;height:44px;border:1px solid rgba(255,255,255,.28);border-radius:50%;background:#111820;color:#fff;font-size:28px;line-height:1;cursor:pointer}.response-table{display:grid;gap:10px}.table-response-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px;padding:12px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.table-prompt,.table-field{display:grid;gap:5px;min-width:0}.table-prompt>span,.table-field>span{font-size:12px;font-weight:700;color:var(--muted)}.table-prompt strong{overflow-wrap:anywhere}.table-input{min-height:44px}.ordering{gap:10px}.order-row{grid-template-columns:36px minmax(0,1fr);min-height:60px;cursor:grab;touch-action:none}.order-row.dragging{opacity:.52;border-style:dashed}.drag-handle{width:32px;height:32px;border:0;border-radius:9px;background:var(--surface-2);color:var(--muted);font-size:20px;cursor:grab}.order-hint{margin-top:9px}.trainer-modes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.trainer-mode{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:end;padding:18px;min-height:178px}.trainer-mode>.pill{grid-column:1/-1;justify-self:start}.trainer-mode-copy h2{margin:0 0 6px}.trainer-mode-copy p{margin:0}.trainer-mode .btn{align-self:end}.trainer-summary{display:flex;justify-content:space-between;gap:12px;margin-top:14px;padding:13px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2);color:var(--muted);font-size:13px}.trainer-summary strong{color:var(--ink);font-size:18px}.more-menu{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.more-entry{display:grid;grid-template-columns:44px minmax(0,1fr) auto;align-items:center;gap:12px;min-height:88px;padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}.more-entry:hover{border-color:color-mix(in srgb,var(--accent) 52%,var(--line));background:var(--accent-soft)}.more-entry-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:var(--surface-2);font-size:21px}.more-entry-copy{display:grid;gap:3px;min-width:0}.more-entry-copy strong{font-size:16px}.more-entry-copy small{color:var(--muted);font-size:12px}.more-entry-arrow{color:var(--muted);font-size:24px}.stat-num{white-space:nowrap}
@media(max-width:760px){.row{flex-wrap:wrap}.row>*{min-width:0}.trainer-modes{grid-template-columns:1fr}.trainer-mode{min-height:0;grid-template-columns:minmax(0,1fr) auto}.trainer-mode>.pill{grid-column:1/-1}.trainer-summary{align-items:flex-start;flex-direction:column}.more-menu{grid-template-columns:1fr}.question-image img{max-height:52vh}.image-recovery{flex-direction:column;align-items:stretch}.image-recovery .btn{width:100%}}
@media(max-width:520px){body{font-size:16px}.main{padding-inline:14px}.q-title{font-size:clamp(24px,7vw,30px);line-height:1.22}.back-link{margin-bottom:8px}.attempt-bar{bottom:68px;margin-top:20px}.attempt-control{min-height:50px}.table-response-row{grid-template-columns:1fr;padding:12px}.table-prompt{padding-bottom:4px}.question-image{margin-inline:-2px}.question-image img{min-height:140px}.question-image figcaption{align-items:flex-start;flex-direction:column}.more-entry{min-height:76px;padding:12px 14px}.trainer-mode{gap:10px}.trainer-mode .btn{min-width:112px;padding-inline:12px}}

/* Legibility baseline: the 100% layout must read like the former enlarged view. */
:root{--muted:#c1ccda;--line:#354657}
@media(prefers-color-scheme:dark){:root{--bg:#080d12;--surface:#111923;--surface-2:#182330;--surface-3:#22303e;--ink:#f5f8fc;--muted:#d0d9e5;--line:#354657;--accent-soft:#27346b}}
body{font-size:19px;line-height:1.5}.main{padding-top:44px}.topbar{height:76px}.top-inner{gap:26px}.desktop-nav{gap:7px;margin-left:30px}.nav-link{padding:11px 14px;font-size:18px}.icon-btn{width:44px;height:44px}.avatar{width:40px;height:40px;font-size:14px}h1{font-size:clamp(34px,4.5vw,52px)}h2{font-size:26px}h3{font-size:20px}.sub,.muted{color:var(--muted)}.eyebrow{font-size:14px}.small,.stat-label,.unit-meta,.q-number,.field label{font-size:16px}.pill{font-size:14px;padding:7px 11px}.btn{min-height:48px;padding:12px 18px;font-size:18px}.stat{padding:18px}.stat-num{font-size:29px}.unit{padding:16px 18px}.unit-title{font-size:19px}.bottom-nav a{font-size:12px}.nav-ico{font-size:20px}.card{padding:26px}.btn:disabled{opacity:1;color:var(--ink);background:var(--surface-3);border:1px solid var(--line)}.btn.primary:disabled{background:var(--accent);border-color:var(--accent);color:#fff}.profile-account-grid{grid-template-columns:minmax(0,1fr)}.profile-account{padding:24px 26px}.profile-account-row{width:100%;justify-content:space-between;gap:20px}.profile-account-row .logout{margin-left:auto}.referral-reward-mode-card{margin:18px 0 26px!important}.referral-reward-mode-card .grid{gap:12px}
@media(hover:hover){a,.btn,.icon-btn,.nav-link,.option,.unit,.more-entry,.trainer-mode,.order-row,.question-image-open,.nav-scroll{transition:transform .16s ease,background-color .16s ease,border-color .16s ease,box-shadow .16s ease,color .16s ease}.btn:hover:not(:disabled),.icon-btn:hover,.nav-link:hover,.more-entry:hover,.trainer-mode:hover,.unit:hover:not(.locked),.order-row:hover,.question-image-open:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 68%,var(--line));box-shadow:0 10px 24px rgba(0,0,0,.16)}.btn.primary:hover:not(:disabled){background:color-mix(in srgb,var(--accent) 84%,#fff)}.btn.danger:hover:not(:disabled){background:color-mix(in srgb,var(--red-soft) 72%,var(--red));color:#fff}.option:hover{background:var(--surface-2);border-color:var(--accent)}.bottom-nav a:hover{background:var(--surface-2);color:var(--ink)}}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 72%,#fff);outline-offset:3px}
@media(max-width:860px){.main{padding-top:30px}.topbar{height:68px}.bottom-nav{padding-block:8px}.bottom-nav a{height:54px;font-size:12px}.card{padding:20px}.small,.stat-label,.unit-meta,.q-number,.field label{font-size:15px}}
@media(max-width:520px){body{font-size:19px}.main{padding-inline:16px}.card{padding:18px}.profile-account{padding:18px}.profile-account-row{gap:14px}.profile-account-row .logout{margin-left:0}.eyebrow{font-size:14px}.bottom-nav a{font-size:12px}.pill{font-size:14px}.btn{font-size:18px}.small,.stat-label,.unit-meta,.q-number,.field label{font-size:16px}.referral-reward-mode-card{margin-bottom:22px!important}}

/* Lesson and assessment interaction pass. */
.quick-practice-card{position:relative;cursor:pointer;border-color:color-mix(in srgb,var(--accent) 42%,var(--line));background:linear-gradient(135deg,var(--surface-2),color-mix(in srgb,var(--accent-soft) 54%,var(--surface-2)))}.quick-practice-card:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.quick-practice-card .quick-practice-action{white-space:nowrap;box-shadow:0 8px 20px color-mix(in srgb,var(--accent) 28%,transparent)}.quick-practice-card .quick-practice-action::after{content:'→';font-size:20px;line-height:1;margin-left:2px}.option{align-items:center}.radio{margin-top:0;align-self:center}.attempt-bar{gap:10px;padding:9px}.attempt-control{display:flex;align-items:center;justify-content:center;min-height:64px;font-size:32px;line-height:1;font-weight:800}.attempt-control[aria-label*="AI"]{font-size:30px}.attempt-control:disabled{opacity:.52}.order-row{will-change:transform}.order-row-moved{border-color:var(--accent)!important;box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 32%,transparent),0 12px 28px rgba(0,0,0,.22)}.order-row.dragging{transform:scale(1.02);box-shadow:0 14px 34px rgba(0,0,0,.3);border-color:var(--accent)}.prose{font-size:22px;line-height:1.72;letter-spacing:-.008em}.prose p{margin-bottom:22px}.lesson-media-image{position:relative}.lesson-image-open{display:block;width:100%;padding:0;border:0;border-radius:12px;overflow:hidden;background:transparent;cursor:zoom-in}.lesson-image-open img{transition:transform .22s ease,filter .22s ease}.lesson-image-open:hover img{transform:scale(1.015);filter:brightness(1.06)}.lesson-media-image figcaption{display:flex;align-items:center;justify-content:space-between;gap:12px}.lesson-player{position:relative;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--surface)}.lesson-player-video{background:#05080c}.lesson-player-video video{display:block!important;width:100%!important;height:auto!important;max-height:64vh;object-fit:contain;background:#05080c}.lesson-player-audio{padding:16px;background:linear-gradient(135deg,var(--surface),var(--surface-2))}.lesson-player audio{display:none}.lesson-player-controls{display:grid;grid-template-columns:52px 58px auto minmax(72px,1fr) 58px 52px;align-items:center;gap:8px;padding:12px;background:color-mix(in srgb,var(--surface) 93%,#000);border-top:1px solid var(--line)}.lesson-player-audio .lesson-player-controls{border:1px solid var(--line);border-radius:14px;background:var(--bg)}.media-control{min-height:48px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);color:var(--ink);font-size:18px;font-weight:780;cursor:pointer}.media-play-toggle{background:var(--accent);border-color:var(--accent);color:#fff;font-size:21px}.media-time{white-space:nowrap;font-size:15px;font-variant-numeric:tabular-nums;color:var(--muted)}.media-seek{width:100%;accent-color:var(--accent);cursor:pointer}.lesson-media-dock{display:none}.top-more-link{margin-left:2px}.referral-reward-choice-card{margin-bottom:26px!important}.referral-reward-choice-card h2{margin:7px 0 8px}.referral-reward-choice-card>p{margin-bottom:16px}.reward-choices{display:grid;gap:10px}.reward-choice{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:'title state' 'copy state';gap:4px 12px;width:100%;padding:16px 17px;border:1px solid var(--line);border-radius:15px;background:var(--surface-2);color:var(--ink);text-align:left;cursor:pointer}.reward-choice-title{grid-area:title;font-size:19px;font-weight:800;line-height:1.18}.reward-choice-copy{grid-area:copy;color:var(--muted);font-size:15px;line-height:1.35}.reward-choice-state{grid-area:state;align-self:center;border-radius:99px;padding:6px 9px;background:var(--surface-3);font-size:14px;font-weight:760;white-space:nowrap}.reward-choice.selected{border-color:var(--accent);background:color-mix(in srgb,var(--accent-soft) 78%,var(--surface))}.reward-choice.selected .reward-choice-state{background:var(--accent);color:#fff}.reward-choice:disabled{cursor:not-allowed;opacity:.76}.reward-choice:disabled .reward-choice-state{background:var(--surface-3);color:var(--muted)}html.input-focus-active .bottom-nav,html.input-focus-active .lesson-media-dock{transform:translateY(calc(130% + env(safe-area-inset-bottom)));opacity:0;pointer-events:none}.bottom-nav,.lesson-media-dock{transition:transform .2s ease,opacity .2s ease}.answer-input,.table-input,.match-select,.compound-input{scroll-margin-block:132px}
@media(hover:hover){.quick-practice-card:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 15px 32px rgba(0,0,0,.2)}.media-control:hover:not(:disabled),.reward-choice:hover:not(:disabled){transform:translateY(-1px);border-color:var(--accent);background:var(--accent-soft)}.media-play-toggle:hover:not(:disabled){background:color-mix(in srgb,var(--accent) 82%,#fff)}}
@media(max-width:860px){.prose{font-size:21px;line-height:1.7}.lesson-player-controls{grid-template-columns:50px 56px minmax(0,1fr) 54px 50px;gap:7px}.lesson-player-video .lesson-player-controls{grid-template-columns:50px 56px minmax(0,1fr) 54px 50px}.media-time{display:none}.lesson-media-dock{position:fixed;z-index:45;right:14px;bottom:calc(80px + env(safe-area-inset-bottom));display:flex;align-items:center;gap:8px;padding:8px;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(16px);border:1px solid var(--line);border-radius:16px;box-shadow:0 12px 30px rgba(0,0,0,.22)}.lesson-media-dock button,.lesson-media-dock a{min-height:42px;padding:0 13px;border:0;border-radius:10px;background:var(--surface-2);color:var(--ink);display:inline-flex;align-items:center;justify-content:center;font-weight:780;font-size:15px}.lesson-media-dock .lesson-dock-ai{background:var(--accent);color:#fff}.top-more-link{display:none}}
@media(max-width:520px){.attempt-bar{gap:8px;padding:7px}.attempt-control{min-height:60px;font-size:30px}.attempt-control[aria-label*="AI"]{font-size:28px}.prose{font-size:21px;line-height:1.68}.lesson-player-controls,.lesson-player-video .lesson-player-controls{grid-template-columns:48px 54px minmax(54px,1fr) 52px 48px;gap:6px;padding:9px}.media-control{min-height:46px;border-radius:11px;font-size:17px}.lesson-player-audio{padding:12px}.lesson-media-image figcaption{align-items:flex-start;flex-direction:column}.reward-choice{padding:15px}.reward-choice-title{font-size:18px}.reward-choice-copy{font-size:15px}.lesson-media-dock{right:10px;bottom:calc(77px + env(safe-area-inset-bottom));padding:7px}.lesson-media-dock button,.lesson-media-dock a{min-height:40px;padding:0 11px;font-size:14px}}

/* Secondary actions remain visibly actionable against dark learning cards. */
.btn.secondary{background:var(--surface-3);border:1px solid color-mix(in srgb,var(--accent) 36%,var(--line));color:var(--ink);box-shadow:inset 0 1px 0 rgba(255,255,255,.05)}.trainer-mode .btn.secondary{border-color:color-mix(in srgb,var(--accent) 62%,var(--line));background:color-mix(in srgb,var(--accent-soft) 70%,var(--surface-3));font-weight:800}.trainer-mode .btn.secondary:hover:not(:disabled){background:var(--accent-soft);border-color:var(--accent)}

/* Media and navigation simplification: one surface, one obvious action. */
.lesson-media-block{margin:0 0 28px}.lesson-media-heading{display:flex;align-items:center;min-height:26px;margin:0 0 12px}.lesson-media-heading .eyebrow{line-height:1.15}.lesson-player{border-radius:18px}.lesson-player-audio{padding:0;border:0;border-radius:16px;background:transparent;overflow:visible}.lesson-player-controls{grid-template-columns:52px minmax(0,1fr) minmax(72px,auto) 52px;gap:10px;padding:12px 14px}.lesson-player-audio .lesson-player-controls{grid-template-columns:52px minmax(0,1fr) minmax(72px,auto);border:0;border-radius:16px;background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line)}.media-timeline{display:grid;gap:4px;min-width:0}.media-control{display:grid;place-items:center;min-height:50px;margin:0;padding:0;text-align:center;line-height:1}.media-speed{min-width:72px;padding:0 8px;white-space:nowrap;font-size:16px}.media-time{font-size:13px;line-height:1.1}.media-seek{display:block;min-width:0}.attempt-control{display:grid!important;place-items:center!important;padding:0!important;text-align:center!important}.attempt-control.prev-q{font-size:0!important}.attempt-control.prev-q::before,.attempt-control.attempt-next[aria-label^="Следующий"]::before{content:'';display:block;width:16px;height:16px;border-bottom:3px solid currentColor;border-left:3px solid currentColor;border-radius:1px;transform:rotate(45deg);margin-left:5px}.attempt-control.attempt-next[aria-label^="Следующий"]{font-size:0!important}.attempt-control.attempt-next[aria-label^="Следующий"]::before{transform:rotate(225deg);margin-left:-5px}.lesson-media-image figcaption{margin-top:12px}.lesson-media-image figcaption .image-expand-link{min-height:38px;padding:6px 10px;border:1px solid color-mix(in srgb,var(--accent) 48%,var(--line));border-radius:10px;background:var(--accent-soft);color:#fff;white-space:nowrap}.lesson-media-image .lesson-image-open{touch-action:manipulation}
@media(max-width:860px){.lesson-player-controls,.lesson-player-video .lesson-player-controls{grid-template-columns:50px minmax(0,1fr) minmax(70px,auto) 50px;gap:8px}.lesson-player-audio .lesson-player-controls{grid-template-columns:50px minmax(0,1fr) minmax(70px,auto)}.media-time{display:none}}
@media(max-width:520px){.lesson-media-block{margin-bottom:24px}.lesson-media-heading{margin-bottom:10px}.lesson-player-controls,.lesson-player-video .lesson-player-controls{grid-template-columns:48px minmax(0,1fr) 68px 48px;gap:7px;padding:10px}.lesson-player-audio .lesson-player-controls{grid-template-columns:48px minmax(0,1fr) 68px}.media-control{min-height:48px}.media-speed{min-width:68px;padding-inline:5px;font-size:15px}.lesson-media-image figcaption{flex-direction:row;align-items:center}.lesson-media-image figcaption .image-expand-link{min-height:36px;padding-inline:9px;font-size:14px}}

/* Full-screen media must be inspectable, not merely opened. */
.attempt-control.prev-q::before,.attempt-control.attempt-next[aria-label^="Следующий"]::before{content:none!important}.attempt-arrow-icon{display:block;width:31px;height:31px;overflow:visible;fill:none;stroke:currentColor;stroke-width:2.35;stroke-linecap:round;stroke-linejoin:round}.attempt-control{isolation:isolate}.media-lightbox{display:block;padding:0;overflow:hidden}.media-lightbox-stage{position:absolute;inset:0;display:grid;place-items:center;overflow:hidden;touch-action:none;cursor:zoom-in}.media-lightbox.is-zoomed .media-lightbox-stage{cursor:grab}.media-lightbox.is-zoomed .media-lightbox-stage:active{cursor:grabbing}.media-lightbox img{display:block;max-width:calc(100vw - 36px);max-height:calc(100dvh - 108px);margin:0;border-radius:14px;transform-origin:center center;will-change:transform;user-select:none;-webkit-user-drag:none;transition:transform .16s ease}.media-lightbox-toolbar{position:fixed;z-index:2;top:max(14px,env(safe-area-inset-top));left:50%;display:flex;align-items:center;gap:7px;transform:translateX(-50%);padding:7px;border:1px solid rgba(255,255,255,.22);border-radius:14px;background:rgba(17,24,32,.92);box-shadow:0 10px 28px rgba(0,0,0,.35);backdrop-filter:blur(14px)}.media-lightbox-toolbar button,.media-lightbox-scale{display:grid;place-items:center;min-width:42px;height:42px;margin:0;padding:0;border:1px solid rgba(255,255,255,.18);border-radius:10px;background:#172331;color:#fff;font:700 16px/1 system-ui,sans-serif}.media-lightbox-toolbar button{cursor:pointer}.media-lightbox-toolbar button:hover{border-color:var(--accent);background:var(--accent-soft)}.media-lightbox-scale{min-width:58px;border-color:transparent;background:transparent;font-variant-numeric:tabular-nums}.media-lightbox-reset{min-width:48px!important;font-size:14px!important}.media-lightbox-close{z-index:3;top:max(18px,calc(env(safe-area-inset-top) + 4px));right:max(18px,env(safe-area-inset-right));display:grid;place-items:center;margin:0;padding:0}.lesson-media-image figcaption .image-expand-link{display:none!important}@media(max-width:520px){.attempt-arrow-icon{width:30px;height:30px}.media-lightbox img{max-width:calc(100vw - 20px);max-height:calc(100dvh - 96px);border-radius:10px}.media-lightbox-toolbar{top:max(10px,env(safe-area-inset-top));gap:5px;padding:5px}.media-lightbox-toolbar button{min-width:40px;height:40px}.media-lightbox-scale{min-width:52px;height:40px;font-size:15px}.media-lightbox-close{top:auto;right:14px;bottom:max(18px,env(safe-area-inset-bottom));width:48px;height:48px;background:rgba(17,24,32,.94)}}

/* Alignment and hierarchy pass: every card begins on the same baseline. */
.media-lightbox-close{position:fixed!important;width:50px!important;height:50px!important;font-size:0!important;line-height:0!important}.media-lightbox-close::before,.media-lightbox-close::after{content:"";position:absolute;left:50%;top:50%;width:20px;height:2.5px;border-radius:99px;background:currentColor;transform-origin:center}.media-lightbox-close::before{transform:translate(-50%,-50%) rotate(45deg)}.media-lightbox-close::after{transform:translate(-50%,-50%) rotate(-45deg)}.trainer-mode{display:flex!important;min-height:0!important;flex-direction:column;align-items:stretch!important;gap:14px!important}.trainer-mode>.pill{align-self:flex-start}.trainer-mode-copy{display:grid;align-content:start;gap:8px;flex:1}.trainer-mode-copy h2{margin:0!important}.trainer-mode-copy p{margin:0!important}.trainer-mode .btn{align-self:flex-start;margin-top:auto}.subpage-back{display:inline-flex;align-items:center;gap:8px;min-height:40px;margin:0 0 18px;color:var(--muted);font-size:16px;font-weight:760;text-decoration:none}.subpage-back::before{content:"";display:block;width:9px;height:9px;border-bottom:2px solid currentColor;border-left:2px solid currentColor;transform:rotate(45deg)}.subpage-back:hover{color:var(--ink)}@media(max-width:760px){.trainer-mode{min-height:0!important}.trainer-mode .btn{width:auto}.subpage-back{margin-bottom:14px}}@media(max-width:520px){.media-lightbox-close{width:48px!important;height:48px!important}.trainer-mode{gap:12px!important}.subpage-back{min-height:38px;font-size:15px}}

/* Route changes retain orientation; compact cards get their own composition. */
#app.route-loading .shell .main{opacity:.72;pointer-events:none;transition:opacity .14s ease}.shell.route-enter .main{opacity:0;transform:translateY(5px)}.shell.route-enter.route-enter-active .main{opacity:1;transform:translateY(0);transition:opacity .16s ease,transform .16s ease}.quick-practice-card .row.between{gap:16px}@media(max-width:640px){.quick-practice-card .row.between{display:grid;grid-template-columns:minmax(0,1fr);justify-items:stretch;gap:16px}.quick-practice-card .row.between>div{min-width:0}.quick-practice-card strong{display:block;margin-top:3px;font-size:20px;line-height:1.26}.quick-practice-card .quick-practice-action{width:100%;min-height:52px;justify-content:center}.quick-practice-card .quick-practice-action::after{margin-left:8px}}@media(prefers-reduced-motion:reduce){#app.route-loading .shell .main,.shell.route-enter .main,.shell.route-enter.route-enter-active .main{transition:none;transform:none}}

/* The desktop side rail gives quick practice its own vertical action rhythm. */
@media(min-width:641px){.quick-practice-card .row.between{flex-direction:column;align-items:stretch;gap:14px}.quick-practice-card .row.between>div{min-width:0}.quick-practice-card strong{display:block;margin-top:3px;font-size:20px;line-height:1.26}.quick-practice-card .quick-practice-action{width:100%;min-height:52px;justify-content:center}.quick-practice-card .quick-practice-action::after{margin-left:8px}}

/* Every interactive surface gets the same visible desktop affordance. */
@media(hover:hover){.brand,.avatar,.back-link,.subpage-back,.card[href],.list-item[href],.lesson-media-dock button,.lesson-media-dock a,details>summary{transition:transform .16s ease,background-color .16s ease,border-color .16s ease,box-shadow .16s ease,color .16s ease}.brand:hover,.back-link:hover,.subpage-back:hover{color:var(--accent)}.brand:hover .brand-mark{transform:translateY(-1px);box-shadow:0 6px 16px color-mix(in srgb,var(--accent) 24%,transparent)}.avatar:hover{transform:translateY(-1px) scale(1.04);box-shadow:0 8px 20px color-mix(in srgb,var(--accent) 38%,transparent)}.card[href]:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 68%,var(--line));box-shadow:0 10px 24px rgba(0,0,0,.16)}.list-item[href]:hover{margin-inline:-10px;padding-inline:10px;border-radius:10px;background:var(--surface-2);color:var(--ink)}.lesson-media-dock button:hover,.lesson-media-dock a:hover{transform:translateY(-1px);background:var(--accent-soft);color:var(--ink)}details>summary:hover{color:var(--accent);cursor:pointer}}

/* A route stays readable while data arrives; the entry is deliberately brief. */
#app.route-loading .shell .main{opacity:1;transition:none}.shell.route-enter .main{opacity:.985;transform:translateY(2px)}.shell.route-enter.route-enter-active .main{opacity:1;transform:translateY(0);transition:opacity .12s ease,transform .12s ease}

/* Errors: separate the queue summary from its list and preserve the action label. */
.errors-list{display:grid;gap:14px}.errors-count{justify-self:start}.errors-start{min-width:160px;white-space:nowrap}.course-overview-link{display:inline-flex;align-items:center;min-height:34px;padding:4px 6px;border-radius:8px;transition:transform .16s ease,background-color .16s ease,color .16s ease}
@media(hover:hover){.course-overview-link:hover{transform:translateY(-1px);background:var(--surface-2);color:var(--accent)}}


/* MOG School product convergence — dark-first learner surface. */
body{min-height:100vh;background:radial-gradient(900px 460px at 86% -8%,rgba(47,111,228,.11),transparent 58%),var(--bg)}
.brand-mark{background:linear-gradient(135deg,#2f6fe4,#72a6ff);color:#fff;box-shadow:0 0 0 5px rgba(47,111,228,.10)}
.topbar{background:color-mix(in srgb,var(--bg) 88%,transparent)}
.auth{background:radial-gradient(720px 420px at 50% -8%,rgba(47,111,228,.16),transparent 62%),var(--bg)}
.auth-card-product{width:min(520px,calc(100vw - 32px));padding:32px}
.auth-card-product h1{font-size:36px;margin-bottom:10px}
.auth-providers{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:22px 0 0}
.auth-provider{display:flex;align-items:center;justify-content:center;min-height:52px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2);color:var(--ink);font-size:17px;font-weight:800;transition:.16s ease}
.auth-provider:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--accent) 70%,var(--line));background:var(--accent-soft)}
.auth-provider-vk::before{content:'VK';display:grid;place-items:center;width:30px;height:30px;margin-right:9px;border-radius:9px;background:#2f6fe4;color:#fff;font-size:12px;font-weight:900}
.auth-provider-yandex::before{content:'Я';display:grid;place-items:center;width:30px;height:30px;margin-right:9px;border-radius:9px;background:#fff;color:#111;font-size:16px;font-weight:900}
.auth-divider{display:flex;align-items:center;gap:12px;margin:20px 0;color:var(--muted);font-size:14px}.auth-divider::before,.auth-divider::after{content:'';height:1px;background:var(--line);flex:1}
.auth-foot{display:flex;justify-content:space-between;gap:12px;margin:18px 0;font-size:15px}.auth-foot a{color:#8bb6ff}.auth-foot a:hover{color:#fff}
.uat-auth{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}.uat-auth summary{color:var(--muted);font-size:14px}

/* Anonymous free lesson uses the exact learner visual language, without account chrome. */
.guest-shell{min-height:100vh}.guest-top{position:sticky;top:0;z-index:35;height:72px;padding:0 max(22px,calc((100vw - var(--max))/2 + 24px));display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(20px)}
.guest-top-meta{display:flex;align-items:center;gap:12px}.guest-exit{color:var(--muted);font-size:15px;font-weight:700}.guest-exit:hover{color:var(--ink)}
.guest-main{max-width:var(--max);margin:auto;padding:42px 24px 100px}.guest-shell-compact .guest-main{max-width:none;padding:0}
.guest-lesson-head{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:24px;margin-bottom:30px}.guest-lesson-head h1{max-width:790px}.guest-progress{min-width:170px;padding:14px 16px;border:1px solid var(--line);border-radius:15px;background:var(--surface)}.guest-progress span,.guest-progress strong{display:block}.guest-progress span{font-size:13px;color:var(--muted)}.guest-progress strong{margin-top:3px;font-size:18px}
.guest-lesson-grid{align-items:start}.guest-theory h2,.guest-example h2,.guest-ai-card h2{font-size:28px;line-height:1.18}.guest-theory p,.guest-example p{font-size:20px;line-height:1.68}.guest-theory .callout{margin-top:22px;font-size:18px;line-height:1.58}
.guest-ai-chat{display:grid;gap:10px;margin:18px 0}.guest-message{max-width:86%;padding:14px 16px;border-radius:16px;font-size:17px;line-height:1.5}.guest-message.mine{justify-self:end;background:#1f2a35}.guest-message.ai{background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 38%,var(--line))}
.guest-check{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:26px}.guest-side-note h3{font-size:21px;margin:7px 0 8px}
.guest-practice{max-width:820px}.guest-practice>h1{margin-bottom:8px}.guest-question-list{display:grid;gap:16px;margin:26px 0}.guest-question h2{font-size:21px;line-height:1.35}.guest-question .option{width:100%;color:var(--ink);font-size:17px}
.guest-result{max-width:780px;margin:auto;text-align:center;padding-top:34px}.result-orbit{width:128px;height:128px;margin:0 auto 24px;border:1px solid color-mix(in srgb,var(--accent) 68%,var(--line));border-radius:50%;background:radial-gradient(circle at 50% 40%,rgba(47,111,228,.28),rgba(47,111,228,.04));display:grid;place-content:center}.result-orbit span{font-size:52px;font-weight:900;line-height:.88}.result-orbit small{margin-top:7px;color:var(--muted);font-size:16px}.guest-result h1{font-size:clamp(42px,6vw,68px);margin:12px 0 16px}.guest-result .sub{margin-inline:auto}.guest-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:30px 0;text-align:left}.guest-result-actions{justify-content:center}.guest-paywall-strip{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:30px;background:linear-gradient(135deg,var(--surface),color-mix(in srgb,var(--accent-soft) 60%,var(--surface)))}
.guest-auth{min-height:calc(100vh - 72px);background:transparent}.guest-auth .auth-card{margin:auto}.recovery-form{margin-top:20px}

/* Checkout consent inside the dark product is explicit and never preselected. */
.checkout-consent{display:flex;align-items:flex-start;gap:12px;margin:18px 0;padding:15px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2);font-size:15px;line-height:1.5}.checkout-consent input{width:20px;height:20px;margin-top:2px;accent-color:var(--accent);flex:none}.checkout-disclosure{margin-top:8px;color:var(--muted);font-size:15px;line-height:1.5}.checkout-legal-links{font-size:14px;color:var(--muted);line-height:1.55}.checkout-legal-links a{color:#8bb6ff}

@media(max-width:760px){.auth-providers{grid-template-columns:1fr}.guest-top{height:64px;padding-inline:16px}.guest-top .brand{font-size:16px}.guest-top-meta .pill{display:none}.guest-main{padding:28px 16px 90px}.guest-lesson-head{grid-template-columns:1fr}.guest-progress{display:none}.guest-check,.guest-paywall-strip{align-items:stretch;flex-direction:column}.guest-check .btn,.guest-paywall-strip .btn{width:100%}.guest-result-grid{grid-template-columns:1fr}.guest-theory p,.guest-example p{font-size:18px}.guest-theory .callout{font-size:17px}.guest-message{max-width:94%;font-size:16px}.auth-card-product{padding:22px}.auth-card-product h1{font-size:32px}.auth-foot{display:grid;gap:8px}.guest-result h1{font-size:44px}}
@media(max-width:520px){.guest-theory h2,.guest-example h2,.guest-ai-card h2{font-size:24px}.guest-question h2{font-size:20px}.guest-question .option{font-size:17px}.guest-top-meta{gap:8px}}

/* Stage A: no redesign of canonical learner screens. */
.free-notice{margin-bottom:20px;padding:12px 16px;border:1px solid var(--line);background:var(--surface-2);border-radius:13px;color:var(--muted);font-size:13px;line-height:1.5}
.free-notice a{color:var(--accent);font-weight:750;text-decoration:underline;text-underline-offset:3px}
.manage-link{width:auto!important;min-width:42px;padding-inline:12px;gap:6px}.manage-link-label{font-size:13px;font-weight:750}
.auth-switch{border:0;padding:0;background:none;color:var(--accent);font-weight:750;font:inherit;cursor:pointer}
.auth-message:empty,.recovery-status:empty{display:none}
@media(max-width:720px){.manage-link-label{display:none}}