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var(--space-4));min-height:100%;padding:var(--space-4);padding-bottom:var(--space-4)}.lesson-host .lesson-screen.has-mood{height:calc(100% + (2 * var(--space-4)));min-height:0}.lesson-screen.has-mood>:not(.mood-atmosphere){position:relative;z-index:1}.mood-atmosphere{--mood-opacity: .75;--mood-motion: .75;--mood-edge: max(8px, calc(50% - 780px) );--mood-wide-edge: max(32px, calc(50% - 820px) );position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none}.mood-intensity-medium{--mood-opacity: 1;--mood-motion: 1}.mood-intensity-high{--mood-opacity: .86;--mood-motion: 1}.mood-entry-plane{position:absolute;inset:0;opacity:0;background-repeat:no-repeat;background-size:cover;background-position:center}.mood-entry-door-slide .mood-entry-plane,.mood-event-door-slide .mood-entry-plane{opacity:calc(.16 * var(--mood-opacity));animation:mood-entry-slide .9s var(--ease-out) both}.mood-entry-curtain-part .mood-entry-plane,.mood-event-curtain-part .mood-entry-plane{opacity:calc(.18 * 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9%,rgba(255,255,255,.46) 9% 10%,transparent 10% 33%,rgba(255,255,255,.42) 33% 34%,transparent 34% 66%,rgba(255,255,255,.42) 66% 67%,transparent 67% 90%,rgba(255,255,255,.46) 90% 91%,transparent 91%),linear-gradient(180deg,#fff6e29e,#fff6e200);box-shadow:inset 0 0 0 1px #bf9a651f}.mood-ambience-pixel-border .mood-pixel-frame{position:absolute;inset:72px max(18px,calc(50% - 805px)) 46px;opacity:calc(.11 * var(--mood-opacity));border:4px solid rgba(37,77,65,.22);border-radius:0;box-shadow:8px 8px #254d411a,inset 8px 8px #ffffff47}.mood-ambience-snow .mood-snowfield{position:absolute;inset:0;opacity:calc(.34 * var(--mood-opacity));background-image:radial-gradient(circle at 12% 16%,rgba(255,255,255,.9) 0 2px,transparent 3px),radial-gradient(circle at 46% 26%,rgba(255,255,255,.78) 0 1.5px,transparent 2.5px),radial-gradient(circle at 74% 12%,rgba(255,255,255,.84) 0 2px,transparent 3px),radial-gradient(circle at 88% 38%,rgba(255,255,255,.76) 0 1.5px,transparent 2.5px);background-size:320px 280px;animation:mood-snow-fall 7.2s linear infinite}.mood-ambience-bookshelves .mood-books{position:absolute;top:182px;bottom:164px;width:54px;opacity:calc(.26 * var(--mood-opacity));border-radius:var(--radius-sm);background:repeating-linear-gradient(90deg,#6c4b3159 0 8px,#b85e3752 9px 16px,#e5b75b4d 17px 24px),linear-gradient(#583c2738,#583c2738);box-shadow:inset 0 0 0 1px #59392626}.mood-books-left{left:calc(var(--mood-edge) + 38px)}.mood-books-right{right:calc(var(--mood-edge) + 38px)}.mood-ambience-plants .mood-plants{position:absolute;bottom:90px;width:78px;height:120px;opacity:calc(.3 * var(--mood-opacity));background:radial-gradient(ellipse at 42% 34%,rgba(76,125,69,.42) 0 18px,transparent 19px),radial-gradient(ellipse at 62% 46%,rgba(76,125,69,.36) 0 20px,transparent 21px),radial-gradient(ellipse at 35% 58%,rgba(76,125,69,.34) 0 16px,transparent 17px),linear-gradient(90deg,transparent 44%,rgba(80,90,52,.34) 45% 50%,transparent 51%),radial-gradient(ellipse at 50% 100%,rgba(127,82,48,.28) 0 28px,transparent 29px)}.mood-plants-left{left:calc(var(--mood-edge) + 64px)}.mood-plants-right{right:calc(var(--mood-edge) + 64px);transform:scaleX(-1)}.mood-glow{position:absolute;width:120px;height:120px;border-radius:50%;opacity:calc(.09 * var(--mood-opacity));background:#e8a14f;filter:blur(32px)}.mood-glow-left{left:var(--mood-wide-edge);top:170px}.mood-glow-right{right:var(--mood-wide-edge);top:280px}.mood-ambience-steam .mood-steam{position:absolute;bottom:28%;width:42px;height:92px;border-radius:50%;opacity:calc(.1 * var(--mood-opacity));background:radial-gradient(ellipse at 50% 70%,transparent 0 34%,rgba(255,255,255,.72) 35% 52%,transparent 54%);filter:blur(4px);animation:mood-steam-rise calc(5.2s / var(--mood-motion)) ease-in-out infinite}.mood-steam-one{left:max(64px,calc(50% - 720px))}.mood-steam-two{right:max(64px,calc(50% - 720px));animation-delay:.9s}.mood-event-lantern-glow .mood-glow,.mood-event-sparkle .mood-glow{animation:mood-event-glow .82s var(--ease-out)}.mood-stamp{position:absolute;right:max(72px,calc(50% - 700px));top:116px;width:72px;height:72px;border:5px solid rgba(177,71,42,.5);border-radius:18px;opacity:0;transform:rotate(-7deg) scale(.7)}.mood-event-stamp-pop .mood-stamp,.mood-event-level-clear .mood-stamp{animation:mood-stamp-pop .9s var(--ease-spring) both}.mood-event-companion-nod .mood-rail{animation:mood-companion-nod .76s var(--ease-out)}.mood-event-curtain-close .mood-paper-door-left{animation:mood-curtain-close-left .9s var(--ease-out) both}.mood-event-curtain-close .mood-paper-door-right{animation:mood-curtain-close-right .9s var(--ease-out) both}.mood-event-color-pulse{animation:mood-color-pulse .9s var(--ease-out)}.mood-event-paper-wobble{animation:mood-paper-wobble .72s var(--ease-out)}.mood-event-soft-dim{opacity:.78}.mood-idle-soft-drift{animation:mood-soft-drift 7.2s ease-in-out infinite}.mood-idle-breathing-light .mood-glow{animation:mood-lantern-breathe 4.2s ease-in-out infinite}.mood-idle-parallax .mood-rail,.mood-idle-parallax .mood-paper-door,.mood-idle-parallax .mood-books,.mood-idle-parallax .mood-plants{animation:mood-parallax 6.4s ease-in-out infinite}@keyframes mood-entry-slide{0%{clip-path:inset(0 0 0 0)}to{clip-path:inset(0 48% 0 48%)}}@keyframes mood-curtain-part{0%{clip-path:inset(0 0 0 0)}to{clip-path:inset(0 42% 0 42%)}}@keyframes mood-page-turn{0%{transform:perspective(900px) rotateY(0);transform-origin:left center}to{transform:perspective(900px) rotateY(-74deg);transform-origin:left center}}@keyframes mood-pixel-wipe{0%{clip-path:inset(0 0 0 0)}to{clip-path:inset(0 0 100% 0)}}@keyframes mood-fade-in{0%{opacity:calc(.28 * var(--mood-opacity))}to{opacity:0}}@keyframes mood-lantern-breathe{50%{opacity:.52;filter:saturate(1.08)}}@keyframes mood-snow-fall{to{background-position:0 280px}}@keyframes mood-steam-rise{50%{transform:translateY(-18px) translate(7px);opacity:.24}}@keyframes mood-event-glow{0%{opacity:.12;transform:scale(.96)}35%{opacity:.36;transform:scale(1.08)}to{opacity:.14;transform:scale(1)}}@keyframes mood-stamp-pop{0%{opacity:0;transform:rotate(-7deg) scale(.7)}45%{opacity:calc(.58 * var(--mood-opacity));transform:rotate(-7deg) scale(1.08)}to{opacity:calc(.28 * var(--mood-opacity));transform:rotate(-7deg) scale(1)}}@keyframes mood-companion-nod{35%{transform:translateY(8px)}}@keyframes mood-curtain-close-left{0%{transform:translate(-120%)}to{transform:translate(0)}}@keyframes mood-curtain-close-right{0%{transform:translate(120%)}to{transform:translate(0)}}@keyframes mood-color-pulse{35%{filter:saturate(1.35) brightness(1.03)}}@keyframes mood-paper-wobble{20%{transform:rotate(.3deg)}55%{transform:rotate(-.25deg)}}@keyframes mood-soft-drift{50%{transform:translateY(-8px)}}@keyframes mood-parallax{50%{transform:translateY(-10px)}}[data-reduced-motion=true] .mood-atmosphere *{animation:none!important}.progress-row{display:grid;grid-template-columns:40px minmax(0,1fr);align-items:center;gap:var(--space-3);margin:0;padding:0}.beads-wrap{gap:var(--space-3)}.beads{display:flex;gap:7px}.bead{flex:1;height:7px}.beads-label{font-family:var(--font-mono);font-size:var(--text-2xs);color:var(--ink-muted)}.mira{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-4);border-radius:var(--radius-lg);background:var(--surface-2);border:var(--border-w) solid var(--line)}.lesson-host .mira{padding:var(--space-3)}.lesson-host .mira-art{width:56px;height:56px}.mira-art{width:72px;height:72px;flex:none;display:grid;place-items:center;border-radius:var(--radius-md);background:var(--surface);border:var(--border-w) solid var(--line);overflow:hidden}.mira-art.is-animated{background:var(--surface)}.mira-sprite-sheet{width:100%;height:100%;display:block;background-repeat:no-repeat;background-position-x:0%;animation:openlingo-sprite var(--sprite-duration, 1s) steps(var(--sprite-steps, 5),end) var(--sprite-iteration, infinite)}@keyframes openlingo-sprite{to{background-position-x:var(--sprite-x-end, 100%)}}[data-reduced-motion=true] .mira-sprite-sheet{animation:none}.mira-art .mira-svg,.mira-art svg{width:100%;height:100%}.mira-copy{min-width:0}.mira-name{color:var(--ink-muted);font-size:var(--text-xs);font-weight:850;letter-spacing:0}.mira-caption{margin-top:var(--space-1);color:var(--ink);line-height:var(--leading-snug)}.lesson-reference-drawer{border:var(--border-w) solid var(--accent-line);border-radius:var(--radius-lg);background:color-mix(in srgb,var(--surface),transparent 1%);box-shadow:var(--shadow-sm);overflow:hidden}.lesson-reference-drawer summary{min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);padding:0 var(--space-3);color:var(--accent);font-weight:850;cursor:pointer;list-style:none}.lesson-reference-drawer summary 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var(--space-4);text-align:left;background:var(--surface);font-size:var(--text-md)}.lesson-host .choice{min-height:58px;padding:var(--space-2) var(--space-3)}.choice:disabled{cursor:default;opacity:1}.choice-key{width:26px;height:26px;flex:none;display:grid;place-items:center;border-radius:var(--radius-xs);border:var(--border-w) solid var(--line-strong);color:var(--ink-muted);font-family:var(--font-mono);font-size:var(--text-xs)}.choice.is-selected .choice-key{border-color:var(--accent);color:var(--accent)}.choice.is-right .choice-key{border-color:var(--positive);color:var(--positive)}.choice.is-wrong .choice-key{border-color:var(--negative);color:var(--negative)}.exercise-actions{margin-top:var(--space-5)}.lesson-host .exercise-actions{margin-top:var(--space-3)}.lesson-host .ex-primary-actions{position:sticky;bottom:0;z-index:3;margin-inline:calc(-1 * var(--space-4));padding:var(--space-3) var(--space-4) 0;background:linear-gradient(180deg,transparent,var(--surface) 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