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@keyframes spark{from{opacity:1;transform:translateY(0) scale(.6)}to{opacity:0;transform:translateY(-36px) scale(1.35)}}@keyframes dance{0%,100%{transform:translateY(0) rotate(0)}25%{transform:translateY(-18px) rotate(-12deg)}50%{transform:translateY(-5px) rotate(12deg)}75%{transform:translateY(-20px) rotate(-8deg)}}@keyframes crumble{0%{opacity:1;transform:scale(1)}50%{opacity:1;transform:rotate(7deg)}100%{opacity:0;transform:translateY(15px) scale(.45);filter:grayscale(1) blur(4px)}}@keyframes pulse{50%{opacity:.7}}
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@media(max-width:850px){.reader-layout{grid-template-columns:1fr}.rail{display:grid;grid-template-columns:1fr 1fr}.rail:has(.lookup){display:block}.lookup{position:fixed;bottom:0;left:0;right:0;max-height:65vh;overflow:auto;z-index:120;border-radius:20px 20px 0 0;padding:25px;box-shadow:0 -15px 90px #263d3655}.rail .encouragement{padding:15px;align-self:center}.rail .hint-card{display:none}.grid{grid-template-columns:1fr}.lesson-card{min-height:170px}.lesson-card .number{margin-bottom:12px}.settings-grid{grid-template-columns:1fr}.page-heading h1{font-size:27px}.top-actions{gap:9px}.preview-label{display:none}}
@media(max-width:620px){.layout{display:block}.sidebar{inset:auto 0 0;width:auto;height:calc(67px + env(safe-area-inset-bottom));padding:6px 4px env(safe-area-inset-bottom);border:0;border-top:1px solid var(--line);z-index:80;background:#f5f5eefa;backdrop-filter:blur(10px)}.sidebar .brand,.nav-label,.nav-end,.exam-card{display:none}.nav{flex-direction:row;justify-content:space-around;gap:0}.nav button{padding:7px 9px;flex-direction:column;gap:3px;font-size:9px;min-width:45px;border-radius:8px}.nav button .icon{width:20px;height:20px}.nav button span{white-space:nowrap}.topbar{height:64px;margin:0 19px}.mobile-brand{display:inline-flex;font-family:var(--serif);font-size:22px;margin-right:8px}.breadcrumb{font-size:10px}.top-actions .avatar{display:none}.sync-status{font-size:10px;max-width:125px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.workspace{padding:25px 16px 100px}.page-heading{align-items:start;gap:8px;margin-bottom:21px}.page-heading h1{font-size:26px}.page-heading p{font-size:11px;max-width:240px}.eyebrow{font-size:9px;letter-spacing:2px}.page-heading .text-button{font-size:11px;margin-top:20px}.paper-body{padding:22px 23px}.paper-top{padding:13px 15px;gap:10px;align-items:start;flex-wrap:wrap}.paper-top .tag{font-size:9px}.paper-footer{padding:15px;flex-wrap:wrap}.paper-footer .legend{font-size:10px}.sentence{font-size:19px;line-height:2.5;letter-spacing:.4px}.sentence.current:before{left:-15px}.article-header h2{font-size:23px}.reader-controls .segmented button{font-size:10px;padding:5px 8px}.cloze{min-width:83px;height:31px;margin:0 3px;padding:0 10px}.paragraph{margin:22px 0}.rail{gap:12px}.rail-card{padding:18px}.encouragement .ja{font-size:14px}.review-paper{padding:30px 23px}.review-paper .sentence{font-size:22px}.wide-panel{padding:22px}.phrase-text{font-size:29px}.auth{margin:8vh 16px}.history-entry{padding:19px}.history-entry .context{font-size:16px}#toast{bottom:90px}.settings-grid .wide-panel{padding:22px}.lookup{padding-bottom:calc(25px + env(safe-area-inset-bottom))}.list-row{gap:12px}.list-row h3{font-size:13px}.coverage-line{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}
@media(max-width:620px){.page-heading{display:block}.page-heading .text-button{margin-top:7px}.page-heading h1{font-size:26px;letter-spacing:1px}.page-heading p{max-width:none}.sentence-actions button{min-width:24px;min-height:24px}.sentence-actions{gap:5px}}