/* v4.1 shared corrective styles */
.home-paths .path{display:flex!important;flex-direction:column!important;padding:0!important;min-width:0;overflow:hidden;gap:0!important;align-items:stretch!important}
.home-paths .path .learning-animation{width:100%!important;flex:none;min-width:0;min-height:230px}
.home-paths .path .learning-label{padding:12px 20px 24px;margin:0;font-size:24px;line-height:1.2}
.learning-animation .sa-word-label{position:absolute;top:calc(100% + 9px);left:0;width:100%;font-size:12px;font-weight:400;color:#506684;line-height:1.4;letter-spacing:0;white-space:nowrap}
.learning-animation .sa-sentence{height:100px}
.learning-animation .sa-flip{opacity:1!important}
.learning-animation .sa-face{transform:rotateY(0deg);backface-visibility:hidden;-webkit-backface-visibility:hidden}
.learning-animation .sa-back{transform:rotateY(180deg)}
main .intro:has(.section-demo){max-width:var(--shell,1200px);width:calc(100% - 48px);margin-inline:auto}
main .intro .section-demo{max-width:none;width:100%;margin:24px auto 0}
.learning-animation .sa-inner{min-width:0}
.language-choices button,.language-choices .more-languages{border-radius:999px!important;min-height:44px;display:flex;align-items:center;padding:10px 16px!important}
.back-link.button{padding:10px 20px;text-decoration:none;gap:8px}
button:disabled,.button:disabled,.future-card,.resource-disabled{color:#687487!important;background:#edf0f4!important;border-color:#d4dbe4!important;box-shadow:none!important;cursor:not-allowed!important;transform:none!important;opacity:1!important}
.availability{display:block;color:#687487;font-size:13px;margin:6px 0}
.resource-disabled .resource-logo{filter:grayscale(1);opacity:.65}
.resource-logo{width:100%!important;height:120px!important;object-fit:contain!important;padding:12px;background:white;box-sizing:border-box}
.future-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.future-card{border:1px solid;border-radius:20px;padding:20px}.future-card h3{font-size:20px;margin:0 0 8px}.future-card p{margin:0}.future-features{padding-block:24px 48px}
.collection-caption{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}.collection-caption h3{margin:0;font-size:20px}.collection-caption .textlink{flex-shrink:0;margin:0}.collection-card>a>img{display:block}
.verb-exercise{padding:20px!important;border-radius:20px}.verb-exercise>label{font-size:15px}.verb-exercise select{padding:10px 12px!important;min-height:44px!important;margin:6px 0 12px!important;font-size:16px!important}.verb-instructions{font-size:15px!important;line-height:1.5;margin:0 0 16px!important}.verb-instructions span{display:block;color:#536681;font-size:14px}.verb-exercise .verb-row{display:grid!important;grid-template-columns:280px minmax(0,1fr);gap:8px 18px!important;margin:10px 0!important;align-items:center}.verb-row label{font-size:14px!important;line-height:1.5}.verb-row label span{white-space:nowrap}.verb-row label small{display:block;font-size:13px;font-weight:400}.verb-exercise .verb-row textarea{min-height:56px!important;height:60px;padding:10px!important;resize:vertical;box-sizing:border-box;margin:0!important;max-width:100%;font-size:16px}.verb-exercise .actions{margin-top:16px!important;gap:12px}.verb-exercise .actions .button{padding:10px 20px!important;min-height:44px}.verb-check-wrap{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.verb-collection{padding-block:20px 40px}.lesson-player .textlink{display:inline-block;margin:12px 18px 12px 0;font-size:16px;padding:0;border:0;border-bottom:1px solid currentColor;border-radius:0;background:none;color:#142b50;min-height:0;text-decoration:none}
.ai-flashcards{margin-top:18px}.ai-flashcards textarea{width:100%;box-sizing:border-box;min-height:240px;font-size:14px;line-height:1.5;padding:14px;resize:vertical}.ai-flashcards summary{cursor:pointer;display:list-item;font-weight:600}.simple-maker{padding:20px!important}.simple-maker h2{font-size:24px!important}.maker-controls{display:flex;flex-wrap:wrap;gap:10px}.maker-controls .button{font-size:14px;padding:10px 16px}.simple-maker input{min-height:44px;font-size:16px}
.story-number input{max-width:100%;min-height:44px}.story-arranged .story-number{display:block}.story-arranged .story-scene{min-width:0}.tip-panel{max-height:min(420px,60dvh);overflow:auto;max-width:calc(100vw - 48px)}.tip-panel dl{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.file-dialog{padding:0!important;border-radius:20px;border:1px solid #c4d2e5;width:min(1100px,calc(100vw - 32px));max-width:calc(100vw - 32px);max-height:calc(100dvh - 32px)}.file-top{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:white;z-index:2;gap:16px}.file-top [data-title]{order:0;font-size:16px}.file-top [data-close]{order:1;flex:0 0 44px;height:44px;width:44px;border-radius:50%;font-size:26px;line-height:1;background:#eef3fb;color:#142b50;border:1px solid #c4d2e5}.file-dialog [data-content]{padding:0 12px 12px}.file-dialog .viewer-scroll{max-height:calc(100dvh - 220px)}
.viewer-scroll{touch-action:pan-y pinch-zoom;overscroll-behavior:contain}.viewer-scroll.is-zoomed{touch-action:pan-x pan-y pinch-zoom}.viewer-full:fullscreen{width:100%!important;height:100%!important;max-width:none!important;max-height:none!important}.viewer-full .viewer-scroll{max-height:none!important}.viewer-close-full{min-width:44px;min-height:36px;border-radius:999px;background:#eef3fb;border:1px solid #c4d2e5;color:#142b50}.viewer-full{overflow:hidden}.viewer-controls{flex-shrink:0;background:white;border-radius:18px}.viewer-controls input{box-sizing:border-box}.file-dialog::backdrop{background:#0d204cb3}.viewer-status{line-height:1.3}
@media(max-width:900px){.home-paths{grid-template-columns:repeat(2,minmax(0,1fr))!important}.verb-exercise .verb-row{grid-template-columns:250px minmax(0,1fr)}}
@media(max-width:600px){.home-paths{grid-template-columns:1fr!important}.home-paths .path .learning-animation{min-height:220px}.home-paths .path .learning-label{font-size:25px;padding:6px 22px 22px}.learning-animation .sa-inner{padding:22px 16px}.learning-animation .sa-kicker{font-size:11px}.learning-animation .sa-token{font-size:clamp(14px,5.6cqw,22px)}main .intro:has(.section-demo){width:calc(100% - 32px)}.verb-exercise{padding:16px!important}.verb-exercise .verb-row{grid-template-columns:1fr;gap:5px!important;margin:12px 0!important}.verb-row label small{display:inline;margin-left:5px}.verb-row label span{white-space:normal}.verb-exercise .verb-row textarea{height:64px}.future-grid{grid-template-columns:1fr}.file-dialog{width:calc(100vw - 16px);max-width:calc(100vw - 16px);max-height:calc(100dvh - 16px)}.viewer-controls{gap:4px!important}.file-dialog .viewer-scroll{max-height:calc(100dvh - 250px)}.collection-caption h3{font-size:18px}.collection-caption .textlink{font-size:15px}}
@media(prefers-reduced-motion:reduce){.learning-animation .sa-flip{display:none!important}.learning-animation .sa-word-label{position:absolute}}
.document-viewer{position:relative;min-width:0}.viewer-full{position:fixed!important;inset:0!important;z-index:10000;background:white;padding:48px 12px 8px!important;display:flex;flex-direction:column;width:100vw!important;height:100dvh!important;box-sizing:border-box}.viewer-full .viewer-scroll{flex:1;min-height:0}.viewer-close-full{position:absolute;right:12px;top:8px;z-index:2}.viewer-controls{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px;padding:8px!important}.viewer-controls button,.viewer-controls a{min-height:36px;min-width:36px;font-size:14px!important;padding:5px 9px!important}.viewer-controls input{max-width:64px!important;font-size:14px!important;padding:5px!important}.viewer-scroll img{max-width:none!important;height:auto;display:block;margin:auto}.viewer-status{font-size:12px;margin:4px 0}

.verb-row label small{color:#536681}.resource-logo{height:160px!important}.resource-disabled:hover{transform:none!important;box-shadow:none!important}.resource-disabled .resource-details{color:#687487}.resource-disabled .resource-details strong{color:#687487}
.words-pills button{flex:1 1 0;min-width:0}.words-pills button[aria-pressed=true]{background:#142b50!important;color:white!important;border-color:#142b50!important}
@media(max-width:600px){.verb-row label small{display:block;margin-left:0}}

.resource-thumbnail{position:relative;display:grid;place-items:center;min-height:180px;padding:24px;box-sizing:border-box;background:#eaf0fa;text-align:center}.resource-thumbnail-label{display:flex;flex-direction:column;gap:12px;align-items:center}.resource-thumbnail-label small{font-size:12px;color:#536681}.resource-thumbnail-label strong{font-size:22px;line-height:1.3;color:#142b50}.resource-thumbnail img{position:absolute;inset:0;width:100%!important;height:100%!important;object-fit:contain!important;background:white}.resource-thumbnail img[hidden]{display:none!important}
/* Separate travel lanes keep words and labels readable during inversion. */
.learning-animation.sa-grammar .sa-sentence{height:190px}
.learning-animation.sa-grammar .sa-token{top:60px}
.learning-animation.sa-grammar .sa-period{top:74px}
@keyframes saSubject{0%,24%,96%,100%{transform:translate(0,0)}29%,91%{transform:translate(0,-60px)}38%,82%{transform:translate(216.129%,-60px)}43%,77%{transform:translate(216.129%,0)}}
@keyframes saExtra{0%,24%,96%,100%{transform:translate(0,0)}29%,91%{transform:translate(0,60px)}38%,82%{transform:translate(-216.129%,60px)}43%,77%{transform:translate(-216.129%,0)}}
.home-paths .path .learning-animation{min-height:270px!important}.learning-animation.sa-expanded,.section-demo.learning-animation{min-height:270px}
.learning-animation .sa-inner{position:relative;padding:52px 18px 28px}
.learning-animation .sa-kicker{position:absolute;top:22px;left:12px;right:12px}
.learning-animation .sa-caption{position:absolute;bottom:16px;left:12px;right:12px}
.learning-animation .sa-story-stage{margin:auto}

/* v4.1 follow-up: one shared layout for previews, exercises and viewers. */
.learning-animation .sa-word-label{display:grid;color:inherit}
.learning-animation .sa-word-label span{grid-area:1/1}
@keyframes saBefore{0%,33.499%,86.5%,100%{opacity:1}33.5%,86.499%{opacity:0}}
@keyframes saAfter{0%,33.499%,86.5%,100%{opacity:0}33.5%,86.499%{opacity:1}}
.learning-animation .sa-before,.learning-animation .sa-after{animation-timing-function:steps(1,end)}
.learning-animation .sa-back{background:#fff;color:var(--sa-navy);border-color:#b9cce7}
.learning-animation .sa-face small{color:var(--sa-navy)}
.learning-animation .sa-flip{-webkit-transform-style:preserve-3d;transform-style:preserve-3d;will-change:transform}
.learning-animation .sa-card-stage{-webkit-perspective:900px;perspective:900px}
.learning-animation .sa-face{-webkit-backface-visibility:hidden;backface-visibility:hidden;transform:rotateY(0deg) translateZ(.1px)}
.learning-animation .sa-back{transform:rotateY(180deg) translateZ(.1px)}
/* Safari before container units: readable fallbacks, enhanced where supported. */
.learning-animation .sa-token{font-size:18px}
.learning-animation .sa-face strong{font-size:25px}
.learning-animation .sa-tense strong{font-size:26px}
@supports(font-size:1cqw){.learning-animation .sa-token{font-size:clamp(14px,5.6cqw,22px)}.learning-animation .sa-face strong{font-size:clamp(19px,7cqw,29px)}.learning-animation .sa-tense strong{font-size:clamp(20px,7.5cqw,33px)}}
.collection-caption h3,.collection-caption .textlink{font-family:inherit;font-size:18px;font-weight:700;line-height:1.4}
.word-list-card .collection-caption{flex-direction:column;align-items:flex-start;gap:10px}
.word-list-card h3{overflow-wrap:anywhere;max-width:100%}
.ai-flashcards{min-width:0}.ai-flashcards textarea{display:block;overflow:hidden;resize:none;max-height:none;margin:12px 0 16px;white-space:pre-wrap;overflow-wrap:anywhere}
.check-unavailable{position:relative;display:inline-flex;align-items:center;gap:6px}
.check-tooltip{display:none;position:absolute;bottom:calc(100% + 9px);left:0;z-index:12;padding:8px 12px;border-radius:10px;background:#142b50;color:#fff;font-size:13px;line-height:1.4;width:max-content;max-width:220px;box-shadow:0 3px 12px #142b5020}
.check-unavailable:focus-visible .check-tooltip{display:block}
@media(hover:hover){.check-unavailable:hover .check-tooltip{display:block}}
.story-number-grid,.story-arranged{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;overflow:visible;padding:0;scroll-snap-type:none}
.story-number-grid .story-scene,.story-arranged .story-scene{min-width:0}
.story-number-grid img,.story-arranged img{width:100%;height:auto;aspect-ratio:auto;object-fit:contain}
.story-number-grid .story-number,.story-arranged .story-number{display:flex;justify-content:space-between;align-items:center;margin-top:8px}
.future-pack{background:#edf0f4;border-color:#d4dbe4;color:#687487;min-height:240px}
.future-pack h2,.future-pack .pack-type{color:#687487}.future-pack:hover{transform:none}
.viewer-scroll{height:68vh;box-sizing:border-box;overflow:auto;display:flex;flex-direction:column;align-items:safe center}
.viewer-scroll img{flex:none;margin:auto;max-height:none!important}
.viewer-scroll.fit-page{overflow:hidden}
.viewer-full{height:100vh!important;height:100dvh!important}
.viewer-full .viewer-scroll{height:0;min-height:0;flex:1 1 0;max-height:none!important}
.viewer-controls [aria-pressed=true]{background:#142b50!important;color:white!important}
@media(max-width:1000px){.story-number-grid,.story-arranged{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}}
@media(max-width:600px){.collection-caption h3,.collection-caption .textlink{font-size:18px}.viewer-controls button,.viewer-controls a{font-size:12px!important;padding:5px 7px!important}.viewer-scroll{height:58vh}}
@media(max-width:420px){.story-number-grid,.story-arranged{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.learning-animation .sa-before{opacity:1}.learning-animation .sa-after{display:none}.living-cover *{animation:none!important;transition:none!important}}
.document-viewer.viewer-full{max-width:none!important;max-height:none!important;margin:0!important;border:0;border-radius:0}

/* Card downloads share a fixed bottom inset, regardless of title length. */
.collection-card{display:flex;flex-direction:column;min-width:0}
.collection-card>.collection-caption{flex:1}
.word-list-card .collection-caption .textlink{margin-top:auto;padding-top:14px}
.check-unavailable:focus-visible{outline:2px solid #1878ea;outline-offset:4px;border-radius:999px}