.book-summary{display:flex;align-items:center;justify-content:space-between;padding:18px;border-radius:17px;margin-bottom:14px}.book-summary p{margin:0 0 7px;font-size:14px}.book-summary>span{font-size:13px;color:#71727b}.unit-list,.group-list{display:grid;gap:10px}.unit-row,.group-row{width:100%;border:0;display:flex;align-items:center;gap:13px;text-align:left;padding:14px;border-radius:15px;background:rgba(249,247,247,.76);box-shadow:inset 0 1px 1px #fff,0 7px 18px rgba(62,69,75,.14);backdrop-filter:blur(16px)}.unit-row>div,.group-row>div{flex:1;display:grid;gap:5px}.unit-row small,.group-row small{color:#747680}.unit-number{width:40px;height:40px;display:grid;place-items:center;border-radius:11px;background:#e0e8ea;color:#687f90}.unit-state,.group-row>span{font-size:12px;color:#637f94}.unit-row.locked,.group-row.locked{background:rgba(232,234,234,.65);color:#8a8d92;box-shadow:inset 1px 2px 5px rgba(70,76,80,.08)}.detail-header{display:flex;align-items:center;gap:14px;margin-bottom:18px}.detail-header button,.study-header button{width:40px;height:40px;border:0;border-radius:50%;background:rgba(255,255,255,.7);font-size:28px}.detail-header h1{font-size:23px;margin:0}.unit-hero{border-radius:18px;padding:19px}.unit-hero p{margin:0 0 8px;color:#686a73;font-size:13px}.unit-hero h2{margin:0 0 5px}.unit-hero>span{font-size:13px;color:#6d6e77}.unit-hero .progress-info{margin-top:20px}.section-label{font-size:17px;font-weight:500;margin:25px 3px 12px}.empty{padding:25px;border-radius:16px;text-align:center}.study-page{min-height:100dvh;background:linear-gradient(145deg,#f7f1f2,#e8f0f2);padding:calc(18px + env(safe-area-inset-top)) 20px calc(24px + env(safe-area-inset-bottom))}.study-header{max-width:660px;margin:auto;display:flex;align-items:center;gap:14px}.study-header>div{flex:1;display:flex;justify-content:space-between}.study-body{max-width:600px;margin:45px auto 0;text-align:center}.preview-card{min-height:370px;padding:46px 25px;display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:22px;background:rgba(255,255,255,.74);box-shadow:inset 0 1px 1px #fff,0 16px 42px rgba(70,79,85,.15)}.preview-card h1{font-size:40px;margin:30px 0 6px}.speaker{width:48px;height:48px;border:0;border-radius:50%;background:#e4ebed;color:#657f91;font-size:25px}.speaker.large{width:62px;height:62px}.study-primary{display:block;width:min(420px,100%);margin:28px auto 0;border:0;border-radius:13px;padding:15px;background:#7692a5;color:#fff;font-size:17px;font-weight:600}.question-prompt{font-size:31px;margin:22px 0 36px}.options{display:grid;gap:13px}.option{min-height:64px;border:0;border-radius:13px;background:rgba(255,255,255,.8);font-size:18px}.option.correct,.correct-input{background:#dceede!important}.wrong{animation:wrongFlash .38s}@keyframes wrongFlash{50%{background:#eebcbc}}.spelling-input{width:min(500px,100%);padding:17px;text-align:center;font-size:22px;border:1px solid #ccd1d3;border-radius:13px}.complete-page{text-align:center;padding-top:14vh}.confetti{font-size:24px;color:#b99272}.trophy{font-size:84px;color:#d29f51}.complete-stats{width:min(420px,100%);margin:35px auto;display:grid;grid-template-columns:1fr 1fr;gap:12px}.complete-stats div{padding:20px;background:#ffffffb3;border-radius:14px;display:grid}.complete-stats strong{font-size:29px}.text-button{border:0;background:transparent;margin-top:18px}@media(min-width:760px){.unit-list{grid-template-columns:1fr 1fr}.options{grid-template-columns:1fr 1fr}}
.review-word{text-align:center;margin:34px 0 30px}.review-word .speaker{display:block;margin:0 auto 15px}.review-word .question-prompt{margin:0 0 10px}.review-phonetic{min-height:24px;margin:0;color:#777984;font-size:17px;letter-spacing:.02em}.preview-card{position:relative}.preview-tap-zone{position:absolute;z-index:1;top:0;bottom:0;width:30%;padding:0;border:0;outline:0;background:transparent!important;box-shadow:none!important;color:#698193;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.preview-tap-zone.previous{left:0}.preview-tap-zone.next{right:0}.preview-tap-zone span{position:absolute;top:56%;transform:translateY(-50%);font-size:54px;font-weight:300;line-height:1}.preview-tap-zone.previous span{left:22px}.preview-tap-zone.next span{right:22px}.preview-tap-zone:hover,.preview-tap-zone:focus,.preview-tap-zone:focus-visible,.preview-tap-zone:active{border:0;outline:0;background:transparent!important;box-shadow:none!important}.preview-tap-zone:disabled{pointer-events:none;opacity:.24}.preview-card .speaker,.preview-card h1,.preview-card p,.preview-card strong{position:relative;z-index:2}.preview-card+.study-primary{margin-top:28px}@media(max-width:480px){.preview-tap-zone.previous span{left:15px}.preview-tap-zone.next span{right:15px}}