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var(--border);border-radius:var(--radius-md);background:var(--surface-soft)}.brief-block ul{margin:.45rem 0 0;padding-left:1.1rem}.brief-block li+li{margin-top:.35rem}.lesson-dialogue{border-top:1px solid var(--border);padding-top:.85rem}.lesson-dialogue summary{display:flex;gap:.5rem;align-items:center;cursor:pointer;font-weight:700}.dialogue-lines{display:grid;gap:.6rem;margin:.8rem 0}.dialogue-lines div{padding:.65rem .8rem;border-radius:var(--radius-sm);background:var(--surface-soft)}.dialogue-lines p{margin:0 0 .2rem;font-weight:700}.completion-challenge{margin:.9rem 0 0;padding:.8rem;border-radius:var(--radius-sm);background:var(--accent-soft)}.daily-checkpoint{justify-content:space-between;align-items:center;padding:1rem;border-radius:var(--radius-md);background:var(--accent-soft);border:1px solid var(--accent)}.daily-checkpoint h3{margin:.2rem 0}.daily-checkpoint p{margin:0}.example-stack,.error-stack{display:grid;gap:.6rem;margin-top:.7rem}.example-stack 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.option-button{min-height:62px;border-color:color-mix(in srgb,var(--color-line-strong) 78%,var(--color-sea));background:color-mix(in srgb,var(--color-surface) 94%,var(--color-blue) 6%);padding:.85rem 1rem;font-weight:720;box-shadow:0 6px 18px #09162a0d}.exercise-card .option-button:hover:not(:disabled){border-color:color-mix(in srgb,var(--color-sea) 68%,var(--color-line));background:color-mix(in srgb,var(--color-surface) 88%,var(--color-sea) 12%);box-shadow:0 10px 26px #319f8e1f}.option-label{display:inline-flex;min-width:0;align-items:center;gap:.85rem}.option-key{display:inline-grid;width:2rem;height:2rem;flex:0 0 2rem;place-items:center;border:1px solid color-mix(in srgb,var(--color-sea) 38%,var(--color-line));border-radius:10px;background:color-mix(in srgb,var(--color-surface-soft) 78%,var(--color-sea) 22%);color:var(--color-sea);font-size:.82rem;font-weight:900}.exercise-card .option-button.is-selected,.exercise-card .option-button[aria-pressed=true]{border-color:var(--color-sea);background:color-mix(in srgb,var(--color-surface) 72%,var(--color-sea) 28%);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--color-sea) 42%,transparent),0 12px 30px #319f8e29;transform:translateY(-1px)}.exercise-card .option-button.is-selected .option-key,.exercise-card .option-button[aria-pressed=true] .option-key{border-color:var(--color-sea);background:var(--color-sea);color:#071c24}.exercise-card .option-button.is-correct{border-color:var(--color-sea);background:color-mix(in srgb,var(--color-surface) 72%,var(--color-sea) 28%)}.exercise-card .option-button.is-wrong{border-color:var(--color-coral);background:color-mix(in srgb,var(--color-surface) 78%,var(--color-coral) 22%)}.exercise-submit-bar{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);border:1px solid color-mix(in srgb,var(--color-sun) 34%,var(--color-line));border-radius:var(--radius-md);background:linear-gradient(120deg,color-mix(in srgb,var(--color-surface) 88%,var(--color-sun) 12%),var(--color-surface));padding:.85rem;box-shadow:inset 0 1px color-mix(in srgb,white 32%,transparent)}.action-guidance{max-width:34ch;margin:0;color:var(--color-muted);font-size:.9rem;line-height:1.45}.exercise-submit-actions{flex:0 0 auto}.lesson-session .hint-action,.lesson-session .skip-action{border-color:color-mix(in srgb,var(--color-sea) 32%,var(--color-line-strong));background:color-mix(in srgb,var(--color-surface-soft) 84%,var(--color-sea) 16%);color:var(--color-ink);box-shadow:0 7px 18px #09162a14}.lesson-session .submit-action{min-width:176px;border-color:color-mix(in srgb,var(--color-sun) 72%,#8c6420);background:linear-gradient(135deg,#f7d978,#efb94f);color:#2a210d;box-shadow:0 12px 28px #e9bd4f47}.lesson-session .submit-action:hover:not(:disabled){background:linear-gradient(135deg,#ffe69a,#f4c65d);box-shadow:0 15px 34px #e9bd4f5c}.lesson-actions{border-top:1px solid var(--color-line);padding-top:var(--space-4)}.next-step-control{display:grid;justify-items:end;gap:.45rem}.next-step-hint{color:var(--color-muted);font-size:.82rem;font-weight:720}.lesson-session .next-action{min-width:154px;border-color:var(--color-sea);background:linear-gradient(135deg,#64d9c4,#35aa97);color:#071f1c}@media(max-width:700px){.exercise-submit-bar{align-items:stretch;flex-direction:column}.exercise-submit-actions,.next-step-control,.lesson-session .next-action{width:100%}.next-step-control{justify-items:stretch}}body{background:linear-gradient(rgba(37,99,235,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.035) 1px,transparent 1px),linear-gradient(180deg,#f7f9fc 0,var(--color-paper) 36rem);background-size:28px 28px,28px 28px,auto}.english-shell{display:block;min-height:100vh;min-height:100svh}.topbar{position:sticky;top:0;z-index:30;display:grid;grid-template-columns:minmax(210px,auto) minmax(0,1fr) auto;min-height:74px;align-items:center;gap:clamp(1rem,3vw,2.5rem);border-bottom:1px solid var(--color-line);background:color-mix(in srgb,var(--color-surface) 92%,transparent);padding:0 clamp(1rem,4vw,3rem);box-shadow:0 8px 28px #0b12200d;-webkit-backdrop-filter:blur(18px) saturate(1.1);backdrop-filter:blur(18px) saturate(1.1)}.topbar .brand{display:inline-flex;width:fit-content;align-items:center;gap:.75rem;border:0;border-radius:0;background:transparent;padding:0;box-shadow:none;color:var(--color-ink);text-decoration:none}.brand-mark{display:grid;width:42px;height:42px;place-items:center;border-radius:9px;background:var(--color-ink);color:var(--color-sun);font-family:var(--font-mono);font-size:.88rem;font-weight:900;letter-spacing:-.05em;box-shadow:5px 5px color-mix(in srgb,var(--color-blue) 30%,transparent)}.brand-copy{display:grid;gap:.05rem}.brand-copy strong{font-size:1rem;letter-spacing:-.02em}.brand-copy small{color:var(--color-muted);font-family:var(--font-mono);font-size:.64rem;letter-spacing:.06em;text-transform:uppercase}.desktop-nav{display:flex;min-width:0;align-items:stretch;justify-content:center;gap:.15rem}.desktop-nav .nav-link{min-height:44px;gap:.45rem;border:0;border-bottom:3px solid transparent;border-radius:0;background:transparent;padding:0 .85rem;color:var(--color-muted);font-size:.88rem;font-weight:760;white-space:nowrap;box-shadow:none}.desktop-nav .nav-link:hover,.desktop-nav .nav-link[aria-current=page]{border-color:var(--nav-accent, var(--color-blue));background:color-mix(in srgb,var(--nav-accent, var(--color-blue)) 7%,transparent);color:var(--color-ink);transform:none}.desktop-nav .nav-link svg{color:var(--nav-accent, var(--color-blue))}.mode-indicator{display:inline-flex;align-items:center;gap:.5rem;color:var(--color-muted);font-family:var(--font-mono);font-size:.68rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.mode-indicator span{width:8px;height:8px;border-radius:50%;background:var(--color-sun);box-shadow:0 0 0 4px color-mix(in srgb,var(--color-sun) 22%,transparent);animation:status-pulse 2.8s ease-in-out infinite}.english-shell .shell-main{padding:clamp(1.4rem,3vw,2.6rem) clamp(1rem,4vw,3.5rem) 6rem}.english-shell .page{width:min(1240px,100%)}.page-header .eyebrow,.english-shell .eyebrow{border:0;border-left:3px solid var(--color-blue);border-radius:0;background:transparent;padding:.12rem 0 .12rem .65rem;color:var(--color-blue);font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase}.english-shell h1{font-size:clamp(2.15rem,5vw,4.6rem);line-height:.98;letter-spacing:-.06em}.english-shell h2{letter-spacing:-.035em}.english-shell .panel,.english-shell .item-card{border-radius:var(--radius-md);background:var(--color-surface);box-shadow:0 8px 24px #0b12200f}.english-shell .button{min-height:46px;border-radius:8px;background:var(--color-blue);color:#fff;box-shadow:4px 4px color-mix(in srgb,var(--color-ink) 15%,transparent)}.english-shell .button:hover:not(:disabled){background:color-mix(in srgb,var(--color-blue) 88%,black);box-shadow:2px 2px color-mix(in srgb,var(--color-ink) 18%,transparent);transform:translate(2px,2px)}.english-shell .button.secondary{border-color:var(--color-line-strong);background:var(--color-surface);color:var(--color-ink);box-shadow:none}.english-shell .badge{min-height:24px;border:1px solid color-mix(in srgb,var(--color-blue) 24%,var(--color-line));border-radius:6px;background:color-mix(in srgb,var(--color-blue) 8%,var(--color-surface));color:var(--color-blue);font-family:var(--font-mono);font-size:.68rem;letter-spacing:.05em}.english-shell .progress{height:6px;border-radius:0;background:color-mix(in srgb,var(--color-line) 72%,transparent);box-shadow:none}.english-shell .progress span{background:linear-gradient(90deg,var(--color-blue),var(--color-violet))}.bottom-nav{display:none}@keyframes status-pulse{0%,to{opacity:.55}50%{opacity:1}}@media(prefers-color-scheme:dark){:root:not([data-theme=light]) body{background:linear-gradient(rgba(96,165,250,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(96,165,250,.035) 1px,transparent 1px),var(--color-paper);background-size:28px 28px}}[data-theme=dark] body{background:linear-gradient(rgba(96,165,250,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(96,165,250,.035) 1px,transparent 1px),var(--color-paper);background-size:28px 28px}@media(max-width:980px){.topbar{grid-template-columns:auto 1fr}.desktop-nav{display:none}.mode-indicator{justify-self:end}.english-shell .shell-main{padding-bottom:calc(5.7rem + env(safe-area-inset-bottom))}.bottom-nav{position:fixed;right:0;bottom:0;left:0;z-index:40;display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid #263348;border-radius:0;background:#0b1220;padding:.35rem .4rem calc(.35rem + env(safe-area-inset-bottom));box-shadow:0 -10px 30px #0b12203d}.bottom-nav .nav-link{min-height:54px;flex-direction:column;justify-content:center;gap:.18rem;border:0;border-top:3px solid transparent;border-radius:0;background:transparent;padding:0;color:#8d99aa;font-size:.7rem;box-shadow:none}.bottom-nav .nav-link:hover,.bottom-nav .nav-link[aria-current=page]{border-top-color:var(--nav-accent, #60a5fa);background:#ffffff0a;color:#fff;transform:none}}@media(max-width:560px){.topbar{min-height:64px;padding-inline:.85rem}.brand-mark{width:36px;height:36px;box-shadow:3px 3px color-mix(in srgb,var(--color-blue) 30%,transparent)}.brand-copy small,.mode-indicator{display:none}.english-shell .shell-main{padding:1rem .75rem calc(5.7rem + env(safe-area-inset-bottom))}}.today-page{display:grid;gap:1.2rem}.today-command{position:relative;display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.55fr);min-height:510px;overflow:hidden;border:1px solid #1d2a3e;background:linear-gradient(110deg,rgba(37,99,235,.18),transparent 46%),#0b1220;color:#f8fafc;box-shadow:12px 12px #2563eb1f}.today-command:before{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:34px 34px;content:"";pointer-events:none}.command-copy{position:relative;z-index:1;display:grid;align-content:center;gap:1.2rem;padding:clamp(1.6rem,5vw,4.8rem)}.command-kicker{display:flex;align-items:center;justify-content:space-between;gap:1rem;border-bottom:1px solid rgba(255,255,255,.14);padding-bottom:.8rem;color:#9fb0c9;font-family:var(--font-mono);font-size:.7rem;font-weight:800;letter-spacing:.13em}.command-copy .eyebrow{width:fit-content;border-left-color:var(--color-sun);color:var(--color-sun)}.command-copy h1{max-width:760px;margin:0;color:#fff;font-size:clamp(2.5rem,6vw,5.7rem);line-height:.94;letter-spacing:-.075em}.command-copy>p{max-width:620px;margin:0;color:#b8c4d6;font-size:clamp(1rem,1.5vw,1.12rem);line-height:1.8}.command-copy .button{background:var(--color-sun);color:#0b1220;box-shadow:4px 4px #2563eb}.command-copy .button:hover:not(:disabled){background:#dbff61}.command-copy .button.secondary{border-color:#ffffff47;background:transparent;color:#fff}.language-console{position:relative;z-index:1;display:grid;align-content:space-between;min-width:0;border-left:1px solid rgba(255,255,255,.14);background:linear-gradient(180deg,#2563eb1f,#7c3aed1a);padding:clamp(1.25rem,3vw,2rem)}.console-topline{display:flex;align-items:center;justify-content:space-between;gap:1rem;color:#91a1b8;font-family:var(--font-mono);font-size:.68rem;font-weight:800;letter-spacing:.1em}.console-status{border:1px solid rgba(200,240,68,.38);padding:.25rem .45rem;color:var(--color-sun)}.language-code{align-self:center;color:transparent;font-family:var(--font-mono);font-size:clamp(7rem,15vw,13rem);line-height:.8;letter-spacing:-.12em;-webkit-text-stroke:2px rgba(255,255,255,.3)}.sound-bars{display:flex;height:64px;align-items:center;gap:5px;overflow:hidden}.sound-bars span{width:4px;height:22%;background:var(--color-sun);animation:sound-bar 1.5s ease-in-out infinite alternate}.sound-bars span:nth-child(2n){height:48%;animation-delay:-.4s}.sound-bars span:nth-child(3n){height:78%;animation-delay:-.9s}.sound-bars span:nth-child(4n){height:34%;animation-delay:-.2s}.sound-bars span:nth-child(5n){height:92%;animation-delay:-1.1s}.language-console dl{display:grid;gap:0;margin:0;border-top:1px solid rgba(255,255,255,.14)}.language-console dl>div{display:flex;align-items:center;justify-content:space-between;gap:1rem;border-bottom:1px solid rgba(255,255,255,.1);padding:.7rem 0}.language-console dt,.language-console dd{margin:0;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em}.language-console dt{color:#7f90a9}.language-console dd{color:#fff;font-weight:800}.metric-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--color-line);background:var(--color-surface);box-shadow:0 8px 24px #0b12200f}.metric-card{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:.9rem;min-width:0;border-right:1px solid var(--color-line);padding:1.1rem 1.25rem}.metric-card:last-child{border-right:0}.metric-card>svg{width:38px;height:38px;border:1px solid var(--color-line);background:var(--color-surface-soft);padding:9px;color:var(--color-blue)}.metric-card>div{display:flex;min-width:0;align-items:baseline;gap:.55rem}.metric-card strong{font-family:var(--font-mono);font-size:clamp(1.5rem,3vw,2.4rem);line-height:1}.metric-card span{color:var(--color-ink);font-weight:760}.metric-card small{grid-column:2;color:var(--color-muted);font-size:.76rem}.phrase-console{display:grid;grid-template-columns:84px minmax(0,1fr) minmax(260px,.55fr);align-items:stretch;border:1px solid var(--color-line);background:var(--color-surface);box-shadow:0 8px 24px #0b12200f}.phrase-index{display:grid;place-items:center;border-right:1px solid var(--color-line);background:var(--color-blue);color:#fff;font-family:var(--font-mono);font-size:1.6rem;font-weight:900;writing-mode:vertical-rl}.phrase-copy{display:grid;align-content:center;gap:.8rem;padding:clamp(1.2rem,3vw,2rem)}.console-label{color:var(--color-blue);font-family:var(--font-mono);font-size:.68rem;font-weight:900;letter-spacing:.12em}.phrase-copy h2{max-width:760px;margin:0;font-size:clamp(1.5rem,3vw,2.7rem);line-height:1.1}.phrase-copy p{margin:0;color:var(--color-muted)}.phrase-console>.speech-panel{align-self:stretch;border:0;border-left:1px solid var(--color-line);border-radius:0;background:var(--color-surface-soft);box-shadow:none}@keyframes sound-bar{0%{transform:scaleY(.55);opacity:.55}to{transform:scaleY(1);opacity:1}}@media(max-width:900px){.today-command{grid-template-columns:1fr}.language-console{grid-template-columns:auto 1fr;gap:1rem;border-top:1px solid rgba(255,255,255,.14);border-left:0}.language-code{font-size:6rem}.sound-bars{align-self:center}.language-console dl{grid-column:1 / -1}.phrase-console{grid-template-columns:64px 1fr}.phrase-console>.speech-panel{grid-column:2;border-top:1px solid var(--color-line);border-left:0}}@media(max-width:680px){.today-command{min-height:0;box-shadow:6px 6px #2563eb1f}.command-copy{padding:1.35rem}.command-copy h1{font-size:clamp(2.35rem,13vw,4rem)}.language-console{display:none}.metric-strip{grid-template-columns:1fr}.metric-card{border-right:0;border-bottom:1px solid 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strong{color:var(--color-ink);font-family:var(--font-mono);font-size:1.35rem;line-height:1}.route-controls{display:flex;justify-content:flex-end;gap:.8rem;border:1px solid var(--color-line);background:var(--color-surface);padding:.75rem}.route-controls .field{width:min(230px,100%);grid-template-columns:auto minmax(120px,1fr);align-items:center;color:var(--color-muted);font-size:.78rem;font-weight:800}.route-controls select{min-height:40px;border-radius:6px;background:var(--color-surface-soft);font-weight:760}.route-workspace{display:grid;grid-template-columns:310px minmax(0,1fr);min-height:640px;border:1px solid var(--color-line);background:var(--color-surface);box-shadow:0 18px 46px #0b122014}.route-rail{min-width:0;border-right:1px solid var(--color-line);background:#0b1220;color:#fff}.rail-heading{display:flex;min-height:72px;align-items:center;justify-content:space-between;border-bottom:1px solid #263348;padding:0 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.route-number{color:var(--color-sun)}.route-tab-copy{display:grid;min-width:0;gap:.22rem}.route-tab-copy>span{overflow:hidden;font-size:.9rem;font-weight:800;text-overflow:ellipsis;white-space:nowrap}.route-tab-copy small{color:#8291a7;font-family:var(--font-mono);font-size:.64rem}.route-tab>svg{color:#53627a}.route-tab.is-active>svg{color:var(--color-sun)}.route-stage{min-width:0;background:linear-gradient(rgba(37,99,235,.03) 1px,transparent 1px),var(--color-surface);background-size:100% 40px;padding:clamp(1rem,3vw,2rem)}.stage-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;border-bottom:1px solid var(--color-line-strong);padding-bottom:1rem}.stage-heading>div{display:grid;gap:.35rem}.stage-code,.stage-heading>span{color:var(--color-blue);font-family:var(--font-mono);font-size:.68rem;font-weight:900;letter-spacing:.1em}.stage-heading h2{margin:0;font-size:clamp(1.7rem,3vw,2.7rem)}.lesson-track{display:grid;gap:0}.track-card{position:relative;display:grid;grid-template-columns:68px minmax(0,1fr) 92px;min-height:170px;align-items:stretch;border-bottom:1px solid var(--color-line);background:transparent;transition:background .16s ease,transform .16s ease}.track-card:hover{z-index:1;background:color-mix(in srgb,var(--color-blue) 5%,var(--color-surface));transform:translate(4px)}.track-card.is-doing{background:color-mix(in srgb,var(--color-blue) 7%,var(--color-surface))}.track-card.is-done{background:color-mix(in srgb,var(--color-sea) 5%,var(--color-surface))}.track-index{display:grid;grid-template-rows:auto 1fr;justify-items:center;gap:.55rem;border-right:1px solid var(--color-line);padding:1.3rem .5rem 0}.track-index span{display:grid;width:34px;height:34px;place-items:center;border:1px solid var(--color-line-strong);background:var(--color-surface);font-family:var(--font-mono);font-size:.7rem;font-weight:900}.track-card.is-doing .track-index span{border-color:var(--color-blue);background:var(--color-blue);color:#fff}.track-card.is-done .track-index span{border-color:var(--color-sea);background:var(--color-sea);color:#fff}.track-index i{width:1px;height:100%;background:var(--color-line)}.track-copy{display:grid;align-content:center;gap:.72rem;min-width:0;padding:1.2rem 1.4rem}.track-topline{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.7rem}.track-topline>span:last-child{color:var(--color-muted);font-family:var(--font-mono);font-size:.64rem;font-weight:800;letter-spacing:.05em}.track-copy h3{margin:0;font-size:clamp(1.12rem,2vw,1.5rem)}.track-copy p{max-width:66ch;margin:0;color:var(--color-muted);line-height:1.6}.track-progress{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:.7rem}.track-progress strong{color:var(--color-muted);font-family:var(--font-mono);font-size:.68rem}.track-entry{display:grid;align-content:center;justify-items:center;gap:.45rem;border-left:1px solid var(--color-line);color:var(--color-blue);font-size:.75rem;font-weight:850;text-decoration:none;transition:background .16s ease,color .16s ease}.track-entry:hover{background:var(--color-blue);color:#fff}.track-entry svg{transition:transform .16s ease}.track-entry:hover svg{transform:translate(4px)}@media(max-width:980px){.route-header{grid-template-columns:1fr}.route-summary{width:fit-content}.route-workspace{grid-template-columns:1fr}.route-rail{border-right:0}.route-list{display:flex;overflow-x:auto;scroll-snap-type:x proximity}.route-tab{min-width:260px;scroll-snap-align:start;border-right:1px solid #202c40;border-bottom:0}}@media(max-width:680px){.route-controls{display:grid;grid-template-columns:1fr 1fr}.route-controls .field{width:auto;grid-template-columns:1fr}.route-summary{width:100%}.route-summary span{min-width:0;flex:1 1 0}.stage-heading{align-items:flex-start;flex-direction:column}.track-card{grid-template-columns:46px minmax(0,1fr)}.track-index{padding-top:1rem}.track-index span{width:28px;height:28px}.track-copy{padding:1rem}.track-entry{grid-column:2;min-height:48px;grid-auto-flow:column;align-content:center;justify-content:end;justify-items:end;border-top:1px solid var(--color-line);border-left:0;padding:0 1rem}}@media(max-width:460px){.route-controls{grid-template-columns:1fr}.route-summary span:nth-child(2){display:none}.route-tab{min-width:230px}}.lesson-brief{position:relative;overflow:hidden;border:1px solid var(--color-line);border-left:5px solid var(--color-violet);border-radius:0;background:var(--color-surface);box-shadow:0 10px 28px #0b12200f}.lesson-brief:after{position:absolute;top:0;right:0;width:96px;height:96px;background:linear-gradient(135deg,transparent 49%,color-mix(in srgb,var(--color-violet) 9%,transparent) 50%);content:"";pointer-events:none}.lesson-brief-heading{border-bottom:1px solid var(--color-line);padding-bottom:1rem}.lesson-brief-grid{gap:0;border:1px solid var(--color-line)}.brief-block{min-height:150px;border:0;border-right:1px solid var(--color-line);border-radius:0;background:var(--color-surface-soft);padding:1rem}.brief-block:last-child{border-right:0}.brief-block>svg{flex:0 0 auto;color:var(--color-violet)}.lesson-dialogue{border-top:0;border-left:3px solid var(--color-blue);background:var(--color-surface-soft);padding:.9rem 1rem}.dialogue-lines div{border:0;border-bottom:1px solid var(--color-line);border-radius:0;background:transparent}.lesson-session{overflow:visible;border:1px solid var(--color-line-strong);border-radius:0;background:var(--color-surface);box-shadow:10px 10px color-mix(in srgb,var(--color-blue) 10%,transparent)}.lesson-session:after{display:none}.lesson-session .lesson-topbar{margin:calc(clamp(1.15rem,2.6vw,1.65rem)*-1);margin-bottom:0;border:0;background:#0b1220;padding:.85rem 1rem;color:#fff}.lesson-session .lesson-meta{color:#9aa8bc;font-family:var(--font-mono);font-size:.72rem}.lesson-session .lesson-exit-button{min-height:38px;border:1px solid #34445d;border-radius:5px;background:transparent;color:#fff;box-shadow:none}.lesson-session .lesson-exit-button:hover{border-color:var(--color-coral);background:#e5484d1f}.lesson-session>.progress{height:8px;margin-inline:calc(clamp(1.15rem,2.6vw,1.65rem)*-1);background:#1d2a3e}.lesson-session>.progress span{background:linear-gradient(90deg,var(--color-sun),var(--color-blue))}.exercise-card{position:relative;border:0;border-left:4px solid var(--color-blue);border-radius:0;background:var(--color-surface-soft);padding:clamp(1rem,3vw,1.8rem);box-shadow:none}.exercise-heading{border-bottom:1px solid var(--color-line);padding-bottom:1rem}.exercise-heading h2{max-width:60ch;font-size:clamp(1.45rem,2.6vw,2.3rem)}.exercise-type-badge{width:fit-content;border:0;border-radius:0;background:var(--color-blue);color:#fff}.exercise-type-badge:before{color:var(--color-sun)}.exercise-card .option-list{counter-reset:english-option}.exercise-card .option-button{min-height:60px;border:1px solid var(--color-line);border-left:3px solid var(--color-line-strong);border-radius:0;background:var(--color-surface);box-shadow:none}.exercise-card .option-button:hover:not(:disabled){border-color:var(--color-blue);border-left-color:var(--color-blue);background:color-mix(in srgb,var(--color-blue) 4%,var(--color-surface));box-shadow:none;transform:translate(4px)}.option-key{border:0;border-radius:4px;background:#0b1220;color:var(--color-sun);font-family:var(--font-mono)}.exercise-card .option-button.is-selected,.exercise-card .option-button[aria-pressed=true]{border-color:var(--color-blue);border-left-width:6px;background:color-mix(in srgb,var(--color-blue) 8%,var(--color-surface));box-shadow:none;transform:none}.exercise-card .option-button.is-selected .option-key,.exercise-card .option-button[aria-pressed=true] .option-key{background:var(--color-blue);color:#fff}.exercise-submit-bar{border:1px solid var(--color-line-strong);border-radius:0;background:var(--color-surface);box-shadow:none}.lesson-session .hint-action,.lesson-session .skip-action{border-radius:6px;background:var(--color-surface);color:var(--color-ink);box-shadow:none}.lesson-session .submit-action,.lesson-session .next-action{border-radius:6px;background:var(--color-blue);color:#fff;box-shadow:4px 4px color-mix(in srgb,var(--color-ink) 15%,transparent)}.lesson-session .submit-action:hover:not(:disabled),.lesson-session .next-action:hover:not(:disabled){background:color-mix(in srgb,var(--color-blue) 86%,black);box-shadow:2px 2px color-mix(in srgb,var(--color-ink) 16%,transparent)}.lesson-actions{border-top:2px solid var(--color-ink)}.feedback-card,.answer-comparison,.hint-card,.self-check-card{border-radius:0;box-shadow:none}.feedback-card.is-correct{border-left:5px solid var(--color-sea)}.feedback-card.is-wrong{border-left:5px solid var(--color-coral)}.completion-card{border:1px solid var(--color-line-strong);border-top:8px solid var(--color-sea);border-radius:0;background:var(--color-surface)}@media(max-width:700px){.lesson-brief-grid{border-bottom:0}.brief-block{border-right:0;border-bottom:1px solid var(--color-line)}.lesson-session .lesson-topbar,.lesson-session>.progress{margin-inline:-1rem}.lesson-session .lesson-topbar{margin-top:-1rem}.lesson-session{box-shadow:5px 5px color-mix(in srgb,var(--color-blue) 10%,transparent)}}.english-shell .grid.three>.panel:after,.english-shell .discover-card:after{display:none}.english-shell .grid.three>.panel{min-height:138px;border-top:4px solid var(--color-blue);border-radius:0}.english-shell .grid.three>.panel:nth-child(2){border-top-color:var(--color-sea)}.english-shell .grid.three>.panel:nth-child(3){border-top-color:var(--color-violet)}.english-shell .grid.three>.panel>svg,.english-shell .discover-card>svg{width:38px;height:38px;border:0;border-radius:5px;background:#0b1220;padding:9px;color:var(--color-sun)}.english-shell .discover-card{min-height:225px;border-radius:0;border-top:5px solid var(--color-blue);background:var(--color-surface);box-shadow:7px 7px color-mix(in srgb,var(--color-blue) 9%,transparent)}.english-shell .discover-card:nth-child(2){border-top-color:var(--color-violet)}.english-shell .discover-card:nth-child(3){border-top-color:var(--color-sea)}.english-shell .discover-card:nth-child(4){border-top-color:#e8790c}.english-shell .discover-card:hover{border-color:var(--color-blue);box-shadow:3px 3px color-mix(in srgb,var(--color-blue) 14%,transparent);transform:translate(4px,4px)}.english-shell .discover-card h2{max-width:16ch;font-size:clamp(1.35rem,2.5vw,2rem)}.english-shell .map-toolbar:not(.route-controls){grid-template-columns:repeat(auto-fit,minmax(190px,1fr));max-width:none;border:1px solid var(--color-line);border-top:4px solid var(--color-blue);border-radius:0;background:var(--color-surface);box-shadow:0 8px 22px #0b12200d}.english-shell .map-toolbar .toolbar[role=tablist]{align-self:end}.english-shell .map-toolbar .toolbar[role=tablist] .button{min-height:40px;border-radius:4px;box-shadow:none}.english-shell .item-card:not(.course-card){border-radius:0;border-left:3px solid var(--color-line-strong);background:var(--color-surface);box-shadow:0 8px 22px #0b12200d;transition:border-color .16s ease,transform .16s ease,box-shadow .16s ease}.english-shell .item-card:not(.course-card):hover{border-left-color:var(--color-blue);box-shadow:0 12px 28px #0b122014;transform:translate(4px)}.english-shell .segmented-control{gap:0;border:1px solid var(--color-line);border-radius:0;background:var(--color-surface);padding:0;box-shadow:none}.english-shell .segmented-control button{min-height:52px;border:0;border-right:1px solid var(--color-line);border-bottom:4px solid transparent;border-radius:0;background:transparent}.english-shell .segmented-control button:last-child{border-right:0}.english-shell .segmented-control button:hover{background:var(--color-surface-soft);transform:none}.english-shell .segmented-control button[aria-selected=true]{border-bottom-color:var(--color-blue);background:color-mix(in srgb,var(--color-blue) 6%,var(--color-surface));box-shadow:none}.english-shell details{border-color:var(--color-line)}.english-shell details summary{color:var(--color-ink)}.english-shell .speech-panel{border-radius:0;border-left:4px solid var(--color-blue);background:var(--color-surface-soft);box-shadow:none}.english-shell .speech-rate-option,.english-shell .word-audio-button{border-radius:5px}.english-shell .completion-stats>div{border-radius:0;border-top:3px solid var(--color-blue);box-shadow:none}.english-shell .completion-stats>div:nth-child(2n){border-top-color:var(--color-violet)}.english-shell .status-message{border-radius:0;border-left:4px solid var(--color-sea)}.english-shell .status-message.is-error{border-left-color:var(--color-coral)}.english-shell .field input,.english-shell .field select,.english-shell .field textarea,.english-shell .search-input{border-radius:5px;background:var(--color-surface)}.english-shell .field input:focus,.english-shell .field select:focus,.english-shell .field textarea:focus,.english-shell .search-input:focus{box-shadow:0 0 0 3px color-mix(in srgb,var(--color-blue) 16%,transparent)}@media(max-width:760px){.english-shell .segmented-control{grid-template-columns:1fr}.english-shell .segmented-control button{border-right:0;border-bottom:1px solid var(--color-line);border-left:4px solid transparent}.english-shell .segmented-control button[aria-selected=true]{border-bottom-color:var(--color-line);border-left-color:var(--color-blue)}}