.book-page{max-width:1280px;margin:auto;padding:12px 18px 28px}.book-page>h1{font-size:clamp(22px,3vw,34px);margin:0;color:#183b65}.book-page>p{margin:4px 0 12px}.book{--u:min(1cqw,1.77778cqh);container-type:size;position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;isolation:isolate;border:3px solid #a69470;border-radius:20px;background:#e5d2af url('./assets/book.webp') center/100% 100%;color:#142e53;font:900 16px 'Zen Maru Gothic',sans-serif}.book *{box-sizing:border-box}.book [hidden]{display:none!important}.book button{font:inherit;line-height:1.5;cursor:pointer;color:#183b65;background:#fff9e9;border:2px solid #c4a36c;border-radius:10px;padding:.4em .7em}.book button:focus-visible{outline:4px solid #17849b;outline-offset:2px}.book button:disabled{cursor:default;opacity:.5}.book button:hover{filter:brightness(1.03)}.base{height:100%;padding:.8% 6% 2%;display:flex;flex-direction:column}.game-tools{height:8%;flex:none;display:flex;align-items:center;justify-content:space-between;gap:8px;position:relative;z-index:2}.game-tools strong{font-size:calc(var(--u)*2);white-space:nowrap;background:#fff7e5da;border-radius:8px;padding:0 .4em}.game-tools nav{display:flex;gap:calc(var(--u)*.45)}.game-tools button{font-size:calc(var(--u)*1.05);padding:.25em .5em}.book[data-phase=menu] .game-tools{justify-content:flex-end}.book[data-phase=menu] .game-tools strong{display:none}.cover{position:absolute;inset:0;background:url('./assets/cover.webp') center/100% 100%}.cover-title{position:absolute;left:14.5%;top:19%;width:28%;height:16%;margin:0;display:grid;place-items:center;font-size:calc(var(--u)*3.35);line-height:1.5;white-space:nowrap}.preview-cards{position:absolute;left:4.2%;top:66%;width:46%;height:21%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:3.5%;padding:0 1%}.preview-cards img{width:100%;height:100%;min-height:0;object-fit:contain;mix-blend-mode:normal}.invitation{position:absolute;left:59%;top:31%;width:34%;height:34%;background:#fff7e7ed;border:2px solid #cdbb98;border-radius:15px;padding:4% 2%;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:14%;text-align:center}.invitation p{font-size:calc(var(--u)*2.6);line-height:1.6;margin:0}.invitation small{font-size:calc(var(--u)*1.9);line-height:1.6}.book .primary{background:transparent url('./assets/start.webp') center/100% 100%;border:0;color:#18355c;padding:1% 7%}.cover .primary{position:absolute;left:58%;top:72%;width:36%;height:15%;font-size:calc(var(--u)*2)}.limit-note{position:absolute;left:60%;top:89%;width:32%;text-align:center;margin:0;font-size:calc(var(--u)*1.2);line-height:1.5;background:#fff6e4d9;border-radius:5px}.game{flex:1;min-height:0;display:grid;grid-template-rows:minmax(0,1fr) 11%;gap:2%;padding-top:1%}.spread{min-height:0;display:grid;grid-template-columns:46% 45%;gap:9%;padding-top:1.2%}.picture-page{min-height:0;display:grid;grid-template-rows:9% minmax(0,1fr) 23%;gap:1%}.category{justify-self:start;align-self:start;background:#b6d5ba;border-radius:8px;padding:.25em .7em;font-size:calc(var(--u)*1.65)}.picture-window{min-height:0;display:flex;align-items:center;justify-content:center;padding:0 4% 0 0;mix-blend-mode:normal}.picture-window img{height:100%;width:100%;object-fit:contain}.practice{display:grid;grid-template-columns:minmax(0,1fr) 32%;gap:2%;align-items:center;background:#fff7e6b3;border:1px solid #dbc59f;border-radius:15px;padding:0 2%;min-height:0}.practice>div{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;min-width:0}.practice strong{font:700 calc(var(--u)*3.8)/1.45 Fredoka,sans-serif;white-space:nowrap}.practice span{font-size:calc(var(--u)*1.5);white-space:nowrap}.practice button{font-size:calc(var(--u)*1.3);padding:.35em;background:#b9ddbc;border-color:#72a287;line-height:1.5}.answer-page{min-height:0;display:grid;grid-template-rows:12% minmax(0,1fr) 7%;gap:2%}.answer-page h2{display:flex;align-items:center;justify-content:center;text-align:center;font-size:calc(var(--u)*2.2);line-height:1.5;margin:0}.answers{display:grid;grid-template-rows:repeat(4,minmax(0,1fr));gap:3%;min-height:0}.book .answer{min-width:0;min-height:0;width:100%;height:100%;padding:1% 8%;border:0;border-radius:13px;background:transparent url('./assets/label-mint.webp') center/100% 100%;font:700 calc(var(--u)*3.4)/1.25 Fredoka,sans-serif;position:relative}.book .answer:nth-child(even){background-image:url('./assets/label-apricot.webp')}.book .answer:disabled{opacity:1}.book .answer.correct{outline:4px solid #267e4e;outline-offset:-4px}.book .answer.selected-wrong{outline:3px dashed #b3553f;outline-offset:-4px}.answer-page>small{font-size:calc(var(--u)*1.1);line-height:1.5;text-align:center}.book[data-phase=correct] #feedback{color:#21653d}.counters{display:flex;align-items:center;justify-content:center;gap:2%;min-height:0}.record{height:100%;width:68%;padding:1% 1.5%;background:url('./assets/record.webp') center/100% 100%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:3%}.record>span{display:flex;align-items:center;justify-content:center;gap:8%;min-width:0}.counters small{font-size:calc(var(--u)*1.2);white-space:nowrap}.counters b{font:700 calc(var(--u)*2.5)/1.25 Fredoka,sans-serif}.counters button{font-size:calc(var(--u)*1.2);padding:.4em .7em;white-space:nowrap;background:#164c7b;color:#fff8e9;border-color:#cbb076}.parent-note{font-size:14px;line-height:1.7;padding:12px}.book:fullscreen{width:100vw;height:100dvh;aspect-ratio:auto;border:0;border-radius:0}.dialog{position:absolute;inset:0;z-index:5;background:#15304db3;display:grid;place-items:center;padding:3%}.dialog-card{position:relative;background:#fff7e7;border:4px solid #bba06c;border-radius:22px;width:min(78%,740px);max-height:100%;overflow:auto;padding:5% 4% 3%;font-size:calc(var(--u)*1.6)}.dialog-card h2{margin:0 0 4%;text-align:center;font-size:calc(var(--u)*2.8)}.dialog-card p{line-height:1.8;margin:.5em 0}.dialog-card .close{position:absolute;right:2%;top:2%;font-size:calc(var(--u)*1.2)}.dialog-card section{display:flex;flex-direction:column;gap:10px}.dialog-card small{font-size:.8em}.dialog-card input{width:100%;accent-color:#266b7c}.dialog-card label{display:flex;justify-content:space-between}.dialog-card .primary{min-height:70px}
@media(orientation:portrait) and (max-width:680px){.book-page{padding:8px}.book{height:min(850px,calc(100dvh - 12px));aspect-ratio:auto;--u:1cqw;border-width:2px;background-size:210% 100%;background-position:left center}.base{padding:3% 5% 4%}.game-tools{height:76px;flex-direction:column;justify-content:center;gap:5px}.game-tools strong{font-size:23px}.game-tools nav{width:100%;justify-content:space-between;gap:2px}.game-tools button{font-size:10px;padding:.4em .3em}.book[data-phase=menu] .game-tools{justify-content:flex-start;padding-top:2%}.cover{background-size:200% 62%;background-position:left top;background-repeat:no-repeat;background-color:#f5e9d0}.cover-title{left:29%;top:12%;width:56%;height:10%;font-size:24px}.preview-cards{left:8%;top:41%;width:87%;height:12%;gap:4%}.invitation{left:7%;top:59%;width:86%;height:21%;padding:4% 5%;gap:7%}.invitation p{font-size:22px;line-height:1.5}.invitation small{font-size:16px;line-height:1.5}.invitation small br{display:none}.cover .primary{left:8%;top:82%;width:84%;height:11%;font-size:21px}.limit-note{left:12%;top:95%;width:76%;font-size:11px}.game{grid-template-rows:minmax(0,1fr) 8%;gap:1%;padding-top:1%}.spread{grid-template-columns:1fr;grid-template-rows:54% 44%;gap:2%;padding-top:0}.picture-page{grid-template-rows:9% minmax(0,1fr) 24%;gap:1%}.category{font-size:14px;padding:.1em .5em}.picture-window{padding:0}.practice{grid-template-columns:minmax(0,1fr) 34%;padding:0 3%}.practice strong{font-size:29px}.practice span{font-size:15px}.practice button{font-size:13px;padding:.3em}.answer-page{grid-template-rows:19% minmax(0,1fr) 13%;gap:2%}.answer-page h2{font-size:18px}.answers{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(2,minmax(0,1fr));gap:4%}.book .answer{font-size:25px;padding:2% 8%}.answer-page>small{font-size:11px}.record{width:74%;padding:2px 8px;gap:4%}.record>span{flex-direction:column;gap:0}.counters small{font-size:10px}.counters b{font-size:19px}.counters button{font-size:10px;max-width:24%;white-space:normal;padding:.3em}.dialog-card{width:98%;padding:48px 5% 6%;font-size:15px;max-height:98%}.dialog-card h2{font-size:25px}.dialog-card .close{font-size:13px}.book:fullscreen{height:100dvh}}
@media(orientation:landscape) and (max-height:520px){.base{padding:.6% 5% 1%}.game-tools{height:31px}.game-tools strong{font-size:17px}.game-tools button{font-size:10px;padding:.15em .4em}.cover-title{font-size:28px}.invitation p{font-size:21px}.invitation small{font-size:15px}.cover .primary{font-size:18px}.limit-note{font-size:10px}.category{font-size:13px}.practice strong{font-size:29px}.practice span{font-size:12px}.practice button{font-size:11px}.answer-page h2{font-size:19px}.book .answer{font-size:26px}.answer-page>small{font-size:10px}.counters small{font-size:10px}.counters b{font-size:21px}.counters button{font-size:10px}.dialog-card{padding:35px 4% 3%;font-size:15px;width:80%}.dialog-card h2{font-size:23px}.dialog-card .close{font-size:12px}}
@media(prefers-reduced-motion:reduce){.book *{scroll-behavior:auto!important}}

.answer-page>small{background:#fff6e4f2;border-radius:6px;color:#173454}