.language-picker{border:0;padding:0;margin:12px 0 0;min-width:0;color:var(--ink,#614b50)}
.language-picker legend{font-size:12px;opacity:.7;margin-bottom:8px;padding:0}
.language-picker>div{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}
.language-picker button{font-family:inherit;font-size:12px!important;min-height:35px;justify-content:center!important;padding:5px 3px!important;border:1px solid #b5986966!important;border-radius:4px;background:transparent;color:inherit;cursor:pointer}
.language-picker button[aria-pressed=true]{background:#47776e;color:#fff6dc;border-color:#a88b50!important}
.language-picker button:focus-visible{outline:2px solid #568c81;outline-offset:3px}
:lang(en) .game-shell{font-family:Georgia,'Times New Roman',serif}
:lang(ja) .game-shell{font-family:'Hiragino Mincho ProN','Yu Mincho','Noto Serif CJK JP','Noto Serif SC',serif}
:lang(ko) .game-shell{font-family:'AppleMyungjo','Batang','Noto Serif CJK KR','Noto Serif SC',serif}
:lang(en) .folded-heading h1{font-size:clamp(18px,2.1vw,32px);letter-spacing:.02em}
:lang(en) .paper-goal{font-size:clamp(18px,1.7vw,27px);line-height:1.3;letter-spacing:0}
:lang(en) .paper-primary{font-size:clamp(17px,1.7vw,26px);line-height:1.2;min-height:58px;padding:12px 23px;white-space:normal}
:lang(en) .paper-context h3{font-size:clamp(22px,2vw,31px);letter-spacing:0}
:lang(en) .chapter-kicker{font-size:clamp(12px,1.2vw,20px)}
:lang(en) .chapter-select-tabs button{font-size:12px;line-height:1.35}
:lang(en) .chapter-list strong{font-size:clamp(14px,1.3vw,20px);line-height:1.2}
:lang(en) .chapter-list small{font-size:10px;letter-spacing:0}
:lang(en) .journal-page-heading h2{font-size:clamp(22px,2.1vw,34px);letter-spacing:0}
:lang(en) .journal-notes h3{font-size:clamp(16px,1.5vw,22px);letter-spacing:0}
:lang(en) .journal-notes p{line-height:1.6;letter-spacing:0}
:lang(ko) .paper-goal,:lang(ja) .paper-goal{font-size:clamp(18px,1.65vw,26px);line-height:1.5;word-break:keep-all;overflow-wrap:anywhere}
:lang(ko) .paper-primary,:lang(ja) .paper-primary{font-size:clamp(17px,1.65vw,25px);white-space:normal;line-height:1.3}
:lang(ko) .journal-notes p{word-break:keep-all;overflow-wrap:anywhere}
:lang(en) .tool-list>button{font-size:16px;letter-spacing:0}
@media(max-width:900px){:lang(en) .paper-goal{font-size:19px}:lang(en) .paper-primary{font-size:19px;min-height:53px}:lang(en) .paper-context h3{font-size:24px}:lang(en) .chapter-kicker{font-size:13px}:lang(en) .folded-heading h1{font-size:18px}:lang(en) .journal-notes p{font-size:12px;line-height:1.6}:lang(en) .journal-cta{font-size:15px}:lang(ko) .paper-goal,:lang(ja) .paper-goal{font-size:20px}.language-picker{margin-top:8px}.language-picker button{min-height:37px}}
:lang(en) .journal h2,:lang(en) .journal h3{font-family:Georgia,'Times New Roman',serif}
:lang(ja) .journal h2,:lang(ja) .journal h3{font-family:'Hiragino Mincho ProN','Yu Mincho','Noto Serif CJK JP',serif}
:lang(ko) .journal h2,:lang(ko) .journal h3{font-family:'AppleMyungjo','Batang','Noto Serif CJK KR',serif}
:lang(en) .paper-goal.compact-goal,:lang(ja) .paper-goal.compact-goal,:lang(ko) .paper-goal.compact-goal{white-space:normal}
:lang(en) .paper-stats>span{white-space:normal;font-size:18px;line-height:1.3}
:lang(en) .topology-paper .paper-stats>span{font-size:23px;white-space:nowrap}
:lang(en) .paper-tab span{writing-mode:vertical-rl;letter-spacing:.05em}
:lang(ko) .paper-tab span{letter-spacing:0}
@media(max-width:900px){:lang(en) .paper-stats>span{font-size:15px}:lang(en) .topology-paper .paper-stats>span{font-size:17px}}
.language-picker button[aria-pressed=true]{background:#47776e!important;color:#fff6dc!important;border-color:#a88b50!important}
/* Translation length must never push content outside the book's page. */
.journal-right{overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#af946d80 transparent;padding-right:8px}
.journal-right>.journal-page-heading,.journal-right>.journal-cta,.journal-right>.journal-source,.journal-right>.journal-text-button{flex-shrink:0}
.journal-principle .journal-notes{flex:1 1 auto;min-height:0;overflow-y:auto;justify-content:flex-start;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#af946d80 transparent}
.journal-principle .journal-note{flex-shrink:0}
:lang(en) .journal-caption p,:lang(ja) .journal-caption p,:lang(ko) .journal-caption p{white-space:normal;letter-spacing:.03em;font-size:clamp(17px,1.7vw,24px)}
:lang(en) .journal-page-heading h2,:lang(ja) .journal-page-heading h2,:lang(ko) .journal-page-heading h2{white-space:normal}
@media(max-width:680px){.journal-right{overflow:visible;padding-right:0}.journal-principle .journal-notes{overflow:visible;flex:initial}.journal-principle .journal-note{flex-shrink:initial}}
:lang(ko) .paper-bottom span{word-break:keep-all}
@media(max-width:680px){.language-picker button{min-height:44px}.tool-view-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) 36px 36px;gap:5px}.tool-view-row button{min-width:0;min-height:40px;padding:6px;font-size:12px;gap:4px;justify-content:center}}
@media(max-width:680px){.journal-backdrop{overflow:hidden}.journal{max-height:calc(100dvh - 40px)}}
@media(max-width:680px){.game-shell .journal-backdrop{overflow:hidden}.game-shell .journal{max-height:calc(100dvh - 40px)}.game-shell .tool-view-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) 36px 36px;gap:5px}.game-shell .tool-view-row button{min-width:0;min-height:40px;padding:6px;font-size:12px;gap:4px;justify-content:center}}
/* Shared long-copy rules cover every Latin locale, rather than English alone. */
html[data-script=latin] :is(.game-shell,.journal,.opening-screen,.settings-dialog){font-family:Georgia,'Times New Roman',serif}html[data-script=latin] :is(.journal h2,.journal h3){font-family:Georgia,'Times New Roman',serif}html[data-script=latin] :is(.folded-heading h1,.journal-page-heading h2,.chapter-list strong){letter-spacing:0;white-space:normal;overflow-wrap:anywhere}html[data-script=latin] .folded-heading h1{font-size:clamp(17px,1.8vw,28px)}html[data-script=latin] .paper-goal{font-size:clamp(18px,1.65vw,26px);line-height:1.45;white-space:normal;letter-spacing:0}html[data-script=latin] .paper-context h3{font-size:clamp(20px,1.8vw,28px);letter-spacing:0}html[data-script=latin] :is(.paper-primary,.journal-cta,.teaching-primary){font-size:clamp(16px,1.45vw,24px);line-height:1.4;letter-spacing:0;white-space:normal;overflow-wrap:anywhere;padding-inline:24px;box-sizing:border-box}html[data-script=latin] .paper-stats>span{white-space:normal;font-size:18px;line-height:1.4}html[data-script=latin] .topology-paper .paper-stats>span{font-size:23px;white-space:nowrap}html[data-script=latin] .journal-page-heading h2{font-size:clamp(21px,2vw,32px)}html[data-script=latin] .journal-notes h3{font-size:clamp(16px,1.5vw,22px);letter-spacing:0}html[data-script=latin] .journal-notes p{line-height:1.65;letter-spacing:0}html[data-script=latin] .journal-imprint p{white-space:normal;letter-spacing:.02em}html[data-script=latin] .journal-caption p{white-space:normal;letter-spacing:.02em;font-size:clamp(16px,1.5vw,23px)}html[data-script=latin] .tool-list>button{font-size:15px;letter-spacing:0;line-height:1.45}html[data-script=latin] .chapter-select-tabs button{font-size:12px;line-height:1.4}html[data-script=latin] .chapter-list small{font-size:10px;letter-spacing:0}html[data-script=latin] .teaching-content h2{font-size:23px;letter-spacing:0}html[data-script=latin] .teaching-content h3{font-size:18px;letter-spacing:0}html[data-script=latin] .teaching-copy p{font-size:15px;line-height:1.8}.paper-primary svg,.teaching-primary svg{flex-shrink:0}.journal-cta>span{min-width:0;overflow-wrap:anywhere}.journal-settings.settings-trigger{border-radius:5px;justify-content:space-between;color:#755b45!important;font-size:15px!important;min-height:44px!important;padding:9px 5px!important}.teaching-settings.settings-trigger{border-radius:22px;min-width:100px;min-height:40px;margin:12px auto 0;display:flex;width:max-content;color:#806343;font-size:12px;padding:7px 14px}.read-aloud{display:flex;align-items:center;gap:6px;background:none;border:0;color:#8b6d43;font:inherit;font-size:11px;min-height:34px;align-self:flex-start;flex:none;margin-top:8px;padding:4px 2px;cursor:pointer}.read-aloud>svg{flex:none}
@media(max-width:900px){html[data-script=latin] .paper-stats>span{font-size:15px}html[data-script=latin] .topology-paper .paper-stats>span{font-size:17px}html[data-script=latin] .paper-primary{font-size:17px}html[data-script=latin] .journal-cta{font-size:16px}html[data-script=latin] .journal-notes p{font-size:12px}html[data-script=latin] .folded-heading h1{font-size:17px}html[data-script=latin] .chapter-kicker{font-size:13px}}
/* Keep journal actions on the page; scroll the menu entries between them. */
@media(min-width:681px){.journal-tools .journal-right,.journal-menu .journal-right{overflow:hidden}.journal-tools .tool-list{flex:1 1 0;min-height:0;overflow-y:auto;justify-content:flex-start;padding-right:5px;margin-top:12px;scrollbar-width:thin;scrollbar-color:#af946d80 transparent}.journal-tools .tool-list>button{flex-shrink:0;min-height:44px}.journal-menu .chapter-list{min-height:0;overflow-y:auto;justify-content:flex-start;scrollbar-width:thin;scrollbar-color:#af946d80 transparent}.journal-menu .chapter-list>button{flex-shrink:0}.journal-tools .journal-page-heading,.journal-menu .journal-page-heading,.journal-menu .chapter-select-tabs,.journal-menu .chapter-pagination,.journal-menu .chapter-progress{flex-shrink:0}}
.save-tools{border-top:1px solid #bfa37a55;margin-top:24px;padding-top:22px}.save-tools h3{margin-bottom:12px}.save-tools-status{font-size:12px;line-height:1.7;color:#7e6a5c;margin:0 0 9px}.save-tools-count{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:8px 0;color:#5e6350;font-size:13px;line-height:1.6}.save-tools-count>span{font-size:11px;color:#47776e}.save-tools-date{font-size:11px;line-height:1.6;color:#9a8572;margin:7px 0}.save-tools-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}.save-tools-actions>button{display:flex;align-items:center;justify-content:center;gap:7px;border:1px solid #bfa37a70;border-radius:6px;min-height:42px;padding:8px 5px;background:transparent;font:inherit;font-size:12px;color:#755a41;line-height:1.4;overflow-wrap:break-word}.save-tools-actions svg{flex:none}.save-preview{margin-top:18px;padding-top:15px;border-top:1px solid #bfa37a55}.save-preview>strong{font-size:15px;font-weight:500;line-height:1.5}.save-preview>p{font-size:12px;line-height:1.7;color:#89766a;margin:8px 0}.save-preview>div{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:12px}.save-preview button{display:flex;align-items:center;justify-content:center;gap:7px;background:none;border:1px solid #bfa37a70;border-radius:6px;font:inherit;font-size:12px;min-height:39px;line-height:1.4;padding:8px 12px;color:#755a41}.save-preview button:last-child{color:#f8eddb;background:#47776e;border-color:#47776e}.save-tools-message{font-size:12px;line-height:1.7;color:#7d6a59;margin:13px 0 0}
.settings-trigger{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid #c5a66a70;border-radius:50%;background:transparent;color:#d9c395;min-width:46px;min-height:46px;padding:9px;cursor:pointer;font:inherit;flex:none}.settings-trigger:hover{background:#dcc18a12;border-color:#dcc18a}.settings-trigger svg{flex:none}.settings-trigger:focus-visible{outline:2px solid #edd9ae;outline-offset:4px}.settings-trigger:disabled{opacity:.5;cursor:default}
.settings-backdrop{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:26px;background:#21182cb5;backdrop-filter:blur(14px);font-family:MathSong,'Songti SC',Georgia,serif;color:#513e47;animation:settings-in .18s ease-out}
.settings-dialog{width:min(890px,100%);max-height:calc(100dvh - 52px);display:flex;flex-direction:column;position:relative;overflow:hidden;background:#f4ead9 url('./limestone.webp') center/100% 100% no-repeat;border:2px solid #c3a06b;border-radius:20px;box-shadow:0 30px 100px #170f2460,0 0 0 5px #8d77954a,inset 0 0 0 5px #f8f0df}
.settings-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;padding:29px 34px 22px;border-bottom:1px solid #bfa37a55;flex:none}.settings-eyebrow{display:flex;align-items:center;gap:8px;font-size:12px;color:#8b6c40;letter-spacing:.08em}.settings-heading h2{font-size:31px;font-weight:500;margin:8px 0 6px;line-height:1.3}.settings-heading p{margin:0;font-size:13px;color:#856b61;line-height:1.7}.settings-close{display:grid;place-items:center;flex:none;width:42px;height:42px;border:1px solid #b5976940;border-radius:50%;background:transparent;color:#82623f;cursor:pointer}
.settings-body{display:grid;grid-template-columns:1fr 1.1fr;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#bfa37a90 transparent;min-height:0;padding:26px 34px 22px;gap:34px}.settings-body h3{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:500;margin:0 0 13px;line-height:1.5}.settings-help{font-size:12px;line-height:1.7;color:#89766a;margin:10px 0}.settings-languages{border-right:1px solid #bfa37a55;padding-right:30px;min-width:0}.settings-sound{min-width:0}.settings-languages .language-picker{margin-top:17px}.settings-languages .language-picker legend{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.settings-languages .language-picker>div{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.settings-languages .language-picker button{min-height:45px!important;font-size:13px!important;padding:8px 5px!important;border-radius:7px;background:#fff9ed36;font-family:Georgia,MathSong,'Songti SC',serif;line-height:1.4;letter-spacing:0;overflow-wrap:anywhere}.settings-languages .language-picker button[aria-pressed=true]{box-shadow:0 2px 6px #30635422}.settings-motion{border-top:1px solid #bfa37a55;padding-top:22px;margin-top:26px}
.settings-control{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:12px}.settings-control>div{min-width:0}.settings-control strong{font-size:15px;font-weight:500;line-height:1.5}.settings-control p{font-size:12px;line-height:1.7;color:#89766a;margin:7px 0 0}.settings-toggle{width:46px;height:26px;min-width:46px;min-height:26px;padding:3px;border:1px solid #a68e75;border-radius:20px;background:#cfc2b0;position:relative;cursor:pointer;flex:none}.settings-toggle>span{display:block;width:18px;height:18px;border-radius:50%;background:#fff5df;box-shadow:0 1px 3px #452e3a25;transform:translateX(0);transition:transform .2s}.settings-toggle[aria-checked=true]{background:#47776e;border-color:#47776e}.settings-toggle[aria-checked=true]>span{transform:translateX(19px)}.settings-toggle>svg{display:none;position:absolute;left:7px;top:6px;color:#f6e9c8}.settings-toggle[aria-checked=true]>svg{display:block}
.settings-volume{display:block;margin:15px 0 10px}.settings-volume>span{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:#856e60;margin-bottom:10px}.settings-volume output{font-family:Georgia,serif;color:#7b6a55;font-variant-numeric:tabular-nums}.settings-volume input{width:100%;accent-color:#497a6e;cursor:pointer;margin:0;min-height:20px}.settings-track{display:flex;gap:8px;font-size:12px;line-height:1.7;color:#856e60;margin:0 0 14px}.settings-track svg{flex:none;color:#b08b4e;margin-top:2px}.settings-track small{display:block;color:#a28b70;font-size:10px}.settings-divider{height:1px;background:#bfa37a55;margin:22px 0}.settings-audio-error{font-size:12px;line-height:1.7;color:#8e5144}.settings-audio-error button{border:0;background:none;font:inherit;text-decoration:underline;color:inherit}
.settings-footer{padding:16px 34px 22px;border-top:1px solid #bfa37a55;display:flex;justify-content:flex-end;flex:none}.settings-footer>button{min-height:48px;display:flex;align-items:center;justify-content:center;gap:14px;min-width:158px;border:0;background:transparent url('./limestone.webp') center/100% 100% no-repeat;color:#f5e4bb;font:inherit;font-size:16px;padding:12px 27px;cursor:pointer;line-height:1.5}.settings-dialog :is(button,input):focus-visible{outline:2px solid #4b7c70;outline-offset:3px}
@keyframes settings-in{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}@media(max-width:680px){.settings-backdrop{padding:16px}.settings-dialog{max-height:calc(100dvh - 32px);border-radius:14px}.settings-heading{padding:22px 23px 18px}.settings-heading h2{font-size:26px}.settings-body{display:flex;flex-direction:column;padding:22px 23px;gap:24px}.settings-languages{border-right:0;border-bottom:1px solid #bfa37a55;padding-right:0;padding-bottom:23px}.settings-languages .language-picker>div{grid-template-columns:repeat(3,minmax(0,1fr))}.settings-languages .language-picker button{font-size:12px!important}.settings-motion{margin-top:22px;padding-top:18px}.settings-footer{padding:14px 23px 18px}.settings-footer>button{width:100%}.settings-sound{padding-bottom:2px}}@media(prefers-reduced-motion:reduce){.settings-backdrop{animation:none}.settings-toggle>span{transition:none}}
/* Real generated book, illustration and button assets; all lesson text stays semantic. */
.journal-backdrop{position:absolute;inset:0;z-index:20;display:flex;align-items:center;justify-content:center;padding:24px;background:#24193170;backdrop-filter:blur(10px);animation:journal-reveal .3s ease-out;color:#422d43}
.journal{--paper-ink:#422d43;--paper-secondary:#69504e;--paper-gold:#ae8146;position:relative;width:min(1240px,calc(100vw - 64px),calc((100dvh - 48px)*1.5));aspect-ratio:3/2;flex:none;color:var(--paper-ink);font-family:MathSong,'Songti SC',serif}
.journal-frame{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;pointer-events:none;user-select:none}
.journal-pages{position:absolute;inset:10.5% 7% 15%;display:grid;grid-template-columns:1fr 1fr;gap:0}
.journal-left{display:flex;flex-direction:column;align-items:center;min-width:0;padding:1% 8% 0 1%;text-align:center}
.journal-imprint{display:flex;flex-direction:column;align-items:center;gap:15px;color:#9d733f}
.journal-imprint p{position:relative;color:#644748;font-size:18px;letter-spacing:3px;margin:0;line-height:1.5;white-space:nowrap}
.journal-figure{margin:15px -10% 5px;flex:1;min-height:0;display:flex;align-items:center;justify-content:center;width:120%}
.journal-figure img{display:block;max-height:100%;width:100%;height:100%;object-fit:contain;user-select:none}
.journal-caption{width:100%;display:flex;flex-direction:column;align-items:center;gap:11px;color:var(--paper-gold);padding:6px 0 0}
.journal-caption p{border-top:1px solid #b98a4b66;padding-top:15px;font-size:25px;letter-spacing:2px;color:#5d3f4e;margin:0;line-height:1.6;white-space:nowrap}
.journal-right{display:flex;flex-direction:column;min-width:0;padding:8% 1% 0 10%}
.journal-page-heading h2{font-size:30px;font-weight:600;line-height:1.5;letter-spacing:1px;white-space:nowrap;margin:0;color:var(--paper-ink)}
.journal-heading-rule{display:flex;align-items:center;gap:12px;color:#b38c51;margin:20px 0 0}.journal-heading-rule::before,.journal-heading-rule::after{content:'';height:1px;flex:1;background:#b98a4b88}
.journal-notes{list-style:none;padding:0;margin:15px 0 20px;flex:1;display:flex;flex-direction:column;justify-content:space-evenly}
.journal-note{display:grid;grid-template-columns:37px 1fr;gap:9px;border-bottom:1px solid #ba976642;padding:17px 0 21px}.journal-note:last-child{border-bottom:0;padding-bottom:13px}
.note-number{font-size:31px;font-style:italic;line-height:1.35;color:var(--paper-gold);font-family:Georgia,'Times New Roman',serif}
.journal-note h3{font-size:23px;font-weight:600;letter-spacing:1px;line-height:1.4;margin:0 0 5px}.journal-note p{font-size:16px;line-height:1.9;letter-spacing:.2px;margin:0;color:#614850}
.journal-cta{width:100%;min-height:72px;flex:none;border:0;position:relative;color:#f8e4af;background:transparent url('./limestone.webp') center/100% 100% no-repeat!important;display:flex;align-items:center;justify-content:center;gap:19px;padding:16px 25px;font-size:22px;letter-spacing:1px;line-height:1.4;transition:filter .2s,transform .2s}
.journal-cta:hover{filter:brightness(1.08);transform:translateY(-1px)}.journal-cta:active{filter:brightness(.98);transform:translateY(1px)}.journal-cta svg{color:#e6bb69;flex:none}
.journal button:focus-visible{outline:2px solid #9b713c;outline-offset:3px}.journal-close{position:absolute;z-index:2;top:9%;right:7%;display:flex;align-items:center;justify-content:center;padding:6px;width:43px;height:43px;border:0;background:none;border-radius:50%;color:#86653d}.journal-close:hover{background:#b58a4b12!important}
.journal-page-number{font-size:11px;color:#9b7e6a;letter-spacing:2px;text-align:right;margin:14px 2px 0}.journal-lead{font-size:20px;line-height:1.9;letter-spacing:1px;margin:25px 0 20px;color:#755752}
.journal-chapter{display:flex;align-items:center;gap:22px;text-align:left;border:0;border-block:1px solid #b58a4b55;background:transparent;width:100%;padding:25px 4px;color:var(--paper-ink)}.journal-chapter:hover{background:#ac7d3c0a!important}.chapter-number{font-size:40px;font-family:Georgia,serif;color:#ac7d3c}.journal-chapter>span:nth-child(2){flex:1;display:flex;flex-direction:column;gap:7px}.journal-chapter strong{font-size:24px;font-weight:500;letter-spacing:1px}.journal-chapter small{font-size:15px;color:#82645e}.journal-chapter>svg{color:#a27d45}.journal-unwritten{display:flex;align-items:center;gap:9px;font-size:14px;color:#8a7069;margin:23px 0 auto;padding-bottom:28px;line-height:1.5}
.journal-text-button{align-self:center;display:flex;align-items:center;gap:8px;border:0;background:transparent;border-radius:5px;padding:5px 7px;font-size:14px;color:#826440;margin:7px 0 0;line-height:1.5}.journal-text-button:hover{background:#ac7d3c0a!important}
.journal-success-tag{display:flex;align-items:center;gap:8px;font-size:13px;color:#8c7345;letter-spacing:2px;margin:15px 0 0}.recap-notes{margin-top:5px;margin-bottom:7px}.recap-notes .journal-note{padding-block:12px}.recap-notes .journal-note h3{font-size:21px}.recap-notes .journal-note p{font-size:15px}.hint-notes{margin-top:0;margin-bottom:5px}.journal-hint .journal-lead{font-size:18px;margin:18px 0 8px}.journal-hint .journal-note h3{font-size:22px}.journal-success .journal-page-heading h2{font-size:27px}.journal-error .journal-lead{flex:1}
@keyframes journal-reveal{from{opacity:0}to{opacity:1}}
@media(max-width:1100px),(max-height:760px){.journal-pages{inset:10.5% 7% 15%}.journal-imprint{gap:8px}.journal-imprint p{font-size:14px;letter-spacing:1.5px}.journal-figure{margin-top:8px}.journal-caption p{font-size:20px;padding-top:10px}.journal-caption{gap:5px}.journal-right{padding-top:7%}.journal-page-heading h2{font-size:24px;letter-spacing:.5px}.journal-heading-rule{margin-top:12px}.journal-note{grid-template-columns:30px 1fr;gap:5px;padding:10px 0 12px}.note-number{font-size:26px}.journal-note h3{font-size:19px;margin-bottom:3px}.journal-note p{font-size:14px;line-height:1.8}.journal-notes{margin:9px 0 8px}.journal-cta{min-height:57px;padding:12px 17px;gap:12px;font-size:18px}.journal-cta svg{width:22px}.journal-page-number{font-size:9px;margin-top:8px}.journal-close{width:36px;height:36px;top:8%;right:6.5%}.journal-close svg{width:24px}.journal-lead{font-size:16px;line-height:1.8;margin:16px 0 15px}.journal-chapter{gap:14px;padding:16px 3px}.chapter-number{font-size:32px}.journal-chapter strong{font-size:20px}.journal-chapter small{font-size:13px}.journal-unwritten{font-size:12px;margin-top:15px;padding-bottom:15px}.journal-text-button{font-size:12px;margin-top:4px}.journal-hint .journal-lead{font-size:15px;margin:12px 0 5px}.journal-hint .journal-note h3{font-size:18px}.journal-success .journal-page-heading h2{font-size:22px}.journal-success-tag{font-size:11px;margin-top:8px}.recap-notes .journal-note h3{font-size:18px}.recap-notes .journal-note p{font-size:13px}.recap-notes .journal-note{padding-block:7px}}
@media(max-width:680px){.journal-backdrop{padding:16px;overflow:auto;align-items:center}.journal{width:min(480px,calc(100vw - 24px));aspect-ratio:auto;max-height:calc(100dvh - 28px);overflow:auto;border-radius:14px;background:#f5ead9 url('./limestone.webp') center/100% 100% no-repeat;box-shadow:0 18px 65px #160f2f55;border:5px solid #9a86a4}.journal-frame{display:none}.journal-pages{position:relative;display:flex;flex-direction:column;inset:auto;padding:25px 24px 20px;gap:18px}.journal-left{padding:0;gap:0}.journal-imprint{gap:7px}.journal-imprint>svg{width:18px;height:18px}.journal-imprint p{font-size:13px;letter-spacing:2px}.journal-figure{width:80%;height:175px;flex:none;margin:4px 0 0}.journal-caption{display:none}.journal-right{padding:0}.journal-page-heading h2{font-size:23px;white-space:normal;text-align:center;letter-spacing:0}.journal-heading-rule{margin-top:13px}.journal-notes{margin:7px 0 8px}.journal-note{grid-template-columns:27px 1fr;padding:12px 0 13px;gap:7px}.note-number{font-size:25px}.journal-note h3{font-size:19px}.journal-note p{font-size:14px}.journal-cta{min-height:56px;font-size:17px;gap:10px;padding:12px 16px}.journal-close{position:sticky;top:10px;right:auto;left:calc(100% - 43px);margin-bottom:-36px;width:33px;height:33px;z-index:3;background:#f7eddbe0}.journal-page-number{margin-top:10px;font-size:10px}.journal-lead{text-align:center;font-size:16px;margin:17px 0}.journal-chapter{padding:18px 1px;gap:14px}.journal-chapter strong{font-size:20px}.journal-chapter small{font-size:13px}.journal-unwritten{font-size:12px;margin:17px 0 20px;padding:0}.journal-text-button{font-size:13px;margin-top:9px}.journal-menu .journal-figure{height:160px}.journal-hint .journal-figure{height:140px}.journal-success .journal-figure{height:140px}.journal-success .journal-page-heading h2{font-size:22px}.journal-success-tag{justify-content:center;margin-top:10px}.recap-notes .journal-note p{font-size:14px}.journal-hint .journal-lead{font-size:15px;line-height:1.8;margin:14px 0 7px}.journal-error .journal-lead{margin-bottom:27px}}
@media(prefers-reduced-motion:reduce){.journal-backdrop{animation:none}}
/* Keep intrinsic raster dimensions from expanding the two facing page tracks. */
.journal-pages{grid-template-rows:minmax(0,1fr);min-height:0}
.journal-left,.journal-right{min-height:0}
.journal-figure{overflow:hidden}
/* Match the selected journal's larger book-to-viewport and editorial type scale. */
@media(min-width:1101px) and (min-height:761px){
.journal{width:min(1400px,88vw,calc((100dvh - 48px)*1.5))}
.journal-pages{bottom:19%}
.journal-page-heading h2{font-size:34px}
.journal-imprint p{font-size:20px}
.journal-note h3{font-size:26px}
.journal-note p{font-size:19px;line-height:1.8}
.note-number{font-size:36px}
.journal-note{grid-template-columns:40px 1fr}
.journal-caption p{font-size:28px}
.journal-cta{font-size:24px;min-height:75px}
.journal-success .journal-page-heading h2{font-size:30px}
.recap-notes .journal-note h3{font-size:23px}
.recap-notes .journal-note p{font-size:17px}
}
@media(min-width:681px){.journal-close{right:9%}}

.journal h2,.journal h3{font-family:JournalInk,MathSong,'Songti SC',serif}
@media(max-width:680px){.journal-backdrop{overflow-x:hidden;overflow-y:auto}.journal{width:min(480px,calc(100vw - 40px))}}

.chapter-turn-nav {
 display:grid;
 grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
 align-items:center;
 gap:8px;
 margin:6px 0 0;
 border-top:1px solid #b8996a55;
 flex:none;
 color:#806343;
 font-size:13px;
}
.chapter-turn-nav button {
 display:flex;
 align-items:center;
 justify-self:start;
 align-self:stretch;
 gap:5px;
 min-width:0;
 min-height:44px;
 padding:4px;
 border:0;
 background:transparent;
 color:#715438;
 font:inherit;
 text-align:start;
 overflow-wrap:anywhere;
}
.chapter-turn-nav button:last-child {justify-self:end;text-align:end}
.chapter-turn-nav button svg {flex:none}
.chapter-turn-nav button[aria-disabled=true] {opacity:.45;cursor:default}
.chapter-turn-nav button:not([aria-disabled=true]):hover {color:#347267}
.chapter-turn-nav button:focus-visible {outline:2px solid #347267;outline-offset:-2px}
/* Each chapter is printed on a two-sided leaf hinged at the spine. */
.chapter-leaf {
 position:absolute;
 z-index:2;
 inset:4% 4% 10% 50%;
 pointer-events:none;
 transform-origin:left center;
 transform-style:preserve-3d;
 animation:chapter-leaf-turn 560ms cubic-bezier(.45,.05,.3,1) both;
}
.chapter-leaf[data-direction="-1"] {animation-direction:reverse}
.chapter-leaf-face {
 position:absolute;
 inset:0;
 display:flex;
 flex-direction:column;
 overflow:hidden;
 border-radius:3px 10px 10px 3px;
 background:#f3e6d2 url('./limestone.webp') center/100% 100% no-repeat;
 box-shadow:6px 6px 18px #422d4340;
 backface-visibility:hidden;
}
.chapter-leaf-content {
 position:absolute;
 inset:7.55% 6.52% 5.81% 0;
 display:flex;
 flex-direction:column;
 overflow:hidden;
 padding:8% 1% 0 10%;
}
.chapter-leaf-back {transform:rotateY(180deg)}
@keyframes chapter-leaf-turn {
 0% {transform:perspective(2300px) rotateY(0);opacity:1}
 42% {transform:perspective(2300px) rotateY(-76deg) skewY(-4deg)}
 82% {opacity:1}
 100% {transform:perspective(2300px) rotateY(-178deg);opacity:0}
}
@media(max-width:1100px),(max-height:760px) {
 .chapter-leaf-content {padding-top:7%}
}
@media(max-width:680px) {
 .chapter-leaf {inset:0 0 0 50%;animation-duration:1ms;visibility:hidden}
}
@media(prefers-reduced-motion:reduce) {
 .chapter-leaf {animation-duration:1ms}
}

.journal :is(.chapter-turn-nav,.chapter-pagination) button[aria-disabled=true],
.journal button:disabled {cursor:default}
@media(hover:hover) {
 .journal-menu .journal-chapter:hover {
  background-color:#b98a4b16;
  color:#28695f;
 }
 .journal-menu .chapter-pagination button:hover:not(:disabled),
 .journal-menu .chapter-turn-nav button:hover:not([aria-disabled=true]),
 .journal-menu .journal-text-button:hover,
 .journal-menu .journal-close:hover {
  background-color:#b98a4b19;
  color:#28695f;
  border-radius:5px;
 }
}
.journal-menu :is(.journal-chapter,.chapter-turn-nav button:not([aria-disabled=true]),.chapter-pagination button:not(:disabled)):active {
 background-color:#b98a4b29;
}
.journal-menu .journal-right[aria-busy=true] :is(.journal-chapter,.chapter-pagination button) {cursor:default}

.journal-menu .chapter-list .journal-chapter {padding-block:clamp(6px,1vh,12px)}

/* A hint is a short note. Reserve room for both actions on the same spread. */
.journal.journal-hint .journal-right {
 padding-top:3%;
}
.journal.journal-hint .journal-page-heading h2 {
 font-size:clamp(18px,2.15vh,26px);
 line-height:1.35;
 letter-spacing:.025em;
 white-space:normal;
}
.journal.journal-hint .journal-heading-rule {margin-top:8px}
.journal.journal-hint .journal-lead,
.journal.journal-hint .journal-note p {
 font-size:clamp(13px,1.55vh,16px);
 line-height:1.55;
 letter-spacing:0;
 overflow-wrap:anywhere;
}
.journal.journal-hint .journal-lead {margin:12px 0 4px}
.journal.journal-hint .hint-notes {
 flex:none;
 margin:0 0 8px;
}
.journal.journal-hint .hint-notes .journal-note {
 grid-template-columns:26px minmax(0,1fr);
 gap:7px;
 padding:8px 0;
}
.journal.journal-hint .note-number {font-size:20px}
.journal.journal-hint .journal-note h3 {
 font-size:clamp(15px,1.8vh,18px);
 line-height:1.35;
 margin:0 0 3px;
}
.journal.journal-hint .journal-cta {
 min-height:44px;
 padding:7px 14px;
 font-size:clamp(14px,1.75vh,18px);
}
.journal.journal-hint .journal-text-button {margin-top:3px}
@media(max-width:680px) {
 .journal.journal-hint .journal-left {display:none}
 .journal.journal-hint .journal-pages {padding-top:37px}
 .journal.journal-hint .journal-right {padding-top:0}
 .journal.journal-hint .journal-lead {text-align:start}
}
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.folded-heading{position:absolute;top:28px;left:34px;display:flex;align-items:center;gap:27px;z-index:5;color:#f0ddbc}.quiet-menu{display:flex;align-items:center;justify-content:center;width:58px;height:45px;border:1px solid #ccb183;border-radius:18px;background:transparent}.folded-heading-divider{height:30px;width:1px;background:#bea480}.folded-heading h1{font-size:25px;font-weight:400;letter-spacing:2px;line-height:1.5}.folded-paper{position:absolute;z-index:6;right:8px;top:8px;bottom:8px;width:var(--paper-width);transform:translateX(calc(100% - 18px));transition:transform .35s ease;filter:drop-shadow(-7px 5px 12px #20112f35)}.folded-paper.is-open{transform:translateX(0)}.paper-art{position:absolute;width:100%;height:100%;inset:0;pointer-events:none;user-select:none}.paper-content{position:absolute;inset:8% 8% 8% 18%;display:flex;flex-direction:column;color:#59364b;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#b29a7680 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#c6a05e}.context-copy{font-size:18px;line-height:1.65;color:#8f6e62;margin:0 0 23px 10px}.paper-primary{display:flex;align-items:center;justify-content:center;width:100%;min-height:64px;border:0;background:url('./limestone.webp') center/100% 100% no-repeat!important;color:#f9eac7;font-size:24px;line-height:1.5;padding:13px 20px;filter:drop-shadow(0 3px 2px #78502d24)}.paper-primary:hover:not(:disabled){filter:brightness(1.12) drop-shadow(0 3px 3px #78502d30)}.paper-primary:focus-visible{outline-color:#36726b;outline-offset:4px}.paper-text{display:flex;align-items:center;justify-content:center;gap:10px;font-size:12px;color:#876c5b;border:0;background:none;width:100%;margin-top:12px;padding:7px}.paper-feedback{font-size:12px;line-height:1.8;color:#8f6e62;margin:12px 4px 0;overflow-wrap:anywhere}.paper-feedback.is-tested{color:#866030}.paper-bottom{margin-top:auto;padding-top:26px}.paper-bottom>p{display:flex;gap:14px;align-items:center;border-top:1px solid #b5926170;padding-top:25px;margin:0 0 25px;font-size:18px;line-height:1.6;color:#947661}.paper-bottom>p svg{color:#b68c58;flex-shrink:0}.paper-book{display:flex;align-items:center;justify-content:center;gap:13px;background:transparent;border:1px solid #b59059;border-radius:28px;box-shadow:inset 0 0 0 3px #fff6dd80,0 2px 3px #88623e22;min-height:53px;padding:7px 25px;color:#704d4a;font-size:22px;margin:0 auto;width:87%}.paper-book:hover{background-color:#e0c79936!important}.paper-book:focus-visible,.paper-tab:focus-visible{outline-color:#34776e}.paper-tab{position:absolute;left:-14px;top:45%;width:34px;height:70px;border:1px solid #b99c6b;border-right:0;border-radius:17px 0 0 17px;background:#58405e;color:#f7deb2;display:flex;align-items:center;justify-content:center;padding:3px}.paper-tab span{display:none}.folded-paper:not(.is-open) .paper-tab{left:-25px}.compass-dock{position:absolute;bottom:35px;left:39px;display:flex;align-items:center;z-index:5;color:#e8cc97}.compass-face{width:104px;height:104px;position:relative;display:flex;align-items:center;justify-content:center;margin:0 -10px;pointer-events:none}.compass-face img{position:absolute;width:100%;height:100%;inset:0}.compass-face span{font:38px Georgia,serif;margin-top:-2px;color:#f1dcaa}.compass-arrow,.compass-undo{background:none;border:1px solid #c7a66b9c;border-radius:18px;min-width:56px;height:44px;padding:7px 13px;display:flex;align-items:center;justify-content:center;position:relative}.compass-arrow kbd,.compass-undo kbd{position:absolute;top:46px;left:0;right:0;font:13px Georgia,serif;opacity:.75;text-align:center}.compass-divider{height:36px;width:1px;margin:0 25px;background:#b0946670}.compass-undo{min-width:56px}.paper-routes{display:flex;flex-direction:column;margin-top:10px;border-top:1px solid #b5926130}.paper-routes button{border:0;border-bottom:1px solid #b5926130;background:none;display:flex;align-items:center;justify-content:space-between;padding:9px 5px;font-size:14px;color:#76534f}.paper-gate{display:flex;align-items:center;justify-content:space-between;border:1px solid #ac8d6470;border-radius:12px;padding:3px 8px;margin:0 0 17px;font-size:20px}.paper-gate button{border:0;background:none;color:#775848;display:flex;align-items:center;justify-content:center;width:38px;height:36px}.paper-route{font-size:14px;line-height:1.8;color:#6e534c;overflow-wrap:anywhere}.paper-segment{display:flex;border:1px solid #b39b7a;border-radius:9px;margin-bottom:15px;padding:2px}.paper-segment button{width:50%;border:0;background:none;font-size:13px;padding:7px;color:#866e61;border-radius:6px}.paper-segment button[aria-pressed=true]{background:#91744b1c;color:#3b746c}
.folded-shell .world-hud button{pointer-events:none}.folded-shell .node-marker{opacity:0!important;background:transparent!important;border:0!important}.folded-shell .node-marker:focus-visible,.folded-shell.show-structure .node-marker:not(.portal-overlapped),.folded-shell .node-marker.math-node{opacity:1!important;background:#3523498a!important;border:1px solid #d0b38d55!important;width:30px;height:30px;font-size:14px;pointer-events:auto}.folded-shell .node-marker:focus-visible{pointer-events:auto}.folded-shell .node-marker.source-side{color:#ffe29b;border-color:#d2ad69!important}.folded-shell .edge-marker{pointer-events:none;background:none!important;border:0!important;min-width:24px;min-height:22px;padding:2px;border-radius:4px;font-size:12px;text-shadow:0 1px 4px #241933}.folded-shell .edge-marker.math-edge{pointer-events:auto}.folded-shell .edge-marker.selected{color:#ffdb8d;background:#352349b8!important;outline:1px solid #c7a66b70}.folded-shell .edge-marker.knob-hit{opacity:0}.folded-shell .edge-marker.knob-hit:focus-visible{opacity:1;pointer-events:auto}.folded-shell .edge-marker small{font-size:9px}.folded-shell .world-hud .capacity-marker{height:34px}.folded-shell .portal-marker,.folded-shell .station-marker{opacity:0;pointer-events:none!important}.folded-shell .portal-marker:focus-visible,.folded-shell .station-marker:focus-visible{opacity:1;pointer-events:auto!important}.folded-shell .portal-overlapped{display:none}.journal-tools .tool-list{display:flex;flex-direction:column;gap:4px;flex:1;justify-content:center}.tool-list>button{display:flex;align-items:center;justify-content:space-between;background:none;border:0;border-bottom:1px solid #b99a6a40;color:#78574e;font-size:18px;padding:13px 2px}.tool-view-row{display:flex;gap:8px;padding:13px 0;flex-wrap:wrap}.tool-view-row button{border:1px solid #b99a6a70;background:none;border-radius:8px;color:#78574e;min-height:36px;padding:7px 10px;display:flex;align-items:center;gap:6px;font-size:13px}.journal-tools .journal-cta{margin-top:16px}
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.opening-shade{position:absolute;inset:0;z-index:10;display:flex;align-items:center;justify-content:center;padding:24px;background:#21172ecc;backdrop-filter:blur(8px)}.opening-dialog{position:relative;width:min(490px,100%);max-height:calc(100dvh - 40px);overflow:auto;background:#f2e7d6 url('./limestone.webp') center/100% 100% no-repeat;color:#4e344a;border:5px solid #806b8e;border-radius:15px;padding:35px 34px 28px;box-shadow:0 28px 85px #10051f55}.opening-close{position:absolute;right:12px;top:12px;background:none;border:0;color:#8b6c49;width:36px;height:36px;display:grid;place-items:center}.opening-dialog-mark{color:#ad864c;margin-bottom:16px}.opening-dialog h2{font:500 28px/1.5 MathSong,'Songti SC',serif;letter-spacing:1px;margin:0 0 15px}.opening-dialog>p{font-size:15px;line-height:1.95;color:#80615e;margin:0 0 23px}.opening-confirm-actions{display:flex;flex-direction:column;gap:9px}.opening-cancel{background:none;border:1px solid #b2915d66;color:#795c4e;padding:12px;min-height:46px;border-radius:7px;font-size:14px;letter-spacing:.7px}.opening-confirm-actions .opening-plate{min-height:62px;font-size:18px;letter-spacing:.7px}.opening-dialog .opening-error{color:#8e5149;font-size:13px}.opening-archives{display:flex;flex-direction:column;max-height:390px;overflow:auto}.opening-archive{display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:0;border-top:1px solid #ae8d5d55;padding:18px 1px;text-align:left;color:#624848}.opening-archive>span{display:flex;flex-direction:column;gap:8px}.opening-archive small{font-size:11px;color:#a08362;font-family:Georgia,serif}.opening-archive strong{font-weight:400;font-size:15px;line-height:1.6}.opening-archive em{font-size:11px;font-style:normal;color:#8f6f5d}.opening-archive svg{flex:none;color:#aa8045}.opening-screen button:focus-visible{outline:2px solid #d8b978;outline-offset:4px}.opening-dialog button:focus-visible{outline-color:#9b7440}
@media(min-width:681px) and (max-height:620px){.opening-screen{min-height:440px}.opening-left{top:6.5%}.opening-screen h1{font-size:8.5vh;letter-spacing:-.1vw}.opening-local-name{font-size:4.8vh}.opening-tagline{font-size:2.5vh;margin-top:12px}.opening-entry{top:44.5%}.opening-chapter{font-size:2.8vh}.opening-level{font-size:3.4vh}.opening-last small{font-size:2.6vh;margin-top:3px}.opening-last{margin-bottom:2.6vh}.opening-primary{height:10vh;min-height:49px;font-size:5.2vh}.opening-new{font-size:3vh;margin-top:1vh;min-height:34px}.opening-footer{bottom:5%}.opening-footer .language-picker button{min-height:30px;font-size:2.4vh!important}.opening-history{font-size:2.8vh}}
@media(max-width:680px){.opening-screen{min-height:650px;overflow:auto}.opening-layout{position:relative;min-height:100%;padding-bottom:28px;display:flex;flex-direction:column}.opening-scene,.opening-fallback{inset:0 0 auto;height:44dvh;min-height:250px;max-height:400px}.opening-left{position:relative;inset:auto;z-index:2;width:100%;max-width:460px;margin:0 auto;padding:calc(clamp(250px,44dvh,400px) - 5px) 28px 0;text-align:center;pointer-events:auto}.opening-screen h1{font-size:52px;letter-spacing:-1.8px;line-height:1.1}.opening-local-name{font-size:27px;letter-spacing:4px;margin-top:10px}.opening-tagline{font-size:13px;line-height:1.8;margin:15px 0 24px;white-space:normal}.opening-entry{position:relative;inset:auto;width:100%;max-width:320px;margin:0 auto}.opening-last{text-align:left;gap:14px;padding-left:5px;margin-bottom:21px}.opening-bookmark{width:22px;height:36px;margin-top:4px}.opening-chapter{font-size:15px}.opening-level{font-size:19px;line-height:1.65}.opening-last small{font-size:13px;margin-top:6px}.opening-last small svg{width:16px}.opening-primary{height:67px;min-height:67px;font-size:32px;max-height:none;padding-inline:35px}.opening-new{font-size:17px;min-height:42px;margin-top:13px;gap:11px}.opening-new svg{width:20px;height:20px}.opening-footer{position:relative;inset:auto;width:100%;max-width:320px;margin:25px auto 0}.opening-footer .language-picker>div{gap:8px}.opening-footer .language-picker button{min-height:39px;font-size:15px!important;padding:6px 4px!important}.opening-first{font-size:13px}.opening-history{position:relative;inset:auto;align-self:center;margin-top:24px;font-size:14px;gap:8px;padding:4px 8px;min-height:33px}.opening-history svg{width:19px}.opening-shade{position:fixed;padding:16px}.opening-dialog{padding:31px 24px 24px;border-width:4px}.opening-dialog h2{font-size:25px}.opening-dialog>p{font-size:14px}.opening-confirm-actions .opening-plate{font-size:16px}.opening-archive strong{font-size:14px}}
:lang(en) .opening-local-name,:lang(ja) .opening-local-name,:lang(ko) .opening-local-name{font-size:clamp(23px,2.45vw,41px);letter-spacing:.05em}:lang(en) .opening-tagline{font-size:clamp(14px,1.28vw,21px);white-space:normal;max-width:450px}:lang(en) .opening-primary{font-size:clamp(25px,2.1vw,36px);letter-spacing:.02em}:lang(ko) .opening-primary{font-size:clamp(25px,2.35vw,40px);letter-spacing:.02em}
@media(max-width:680px){:lang(en) .opening-local-name,:lang(ja) .opening-local-name,:lang(ko) .opening-local-name{font-size:23px}:lang(en) .opening-tagline{font-size:13px}:lang(en) .opening-primary,:lang(ko) .opening-primary{font-size:27px}}
@media(min-width:681px){:lang(en) .opening-chapter{font-size:clamp(14px,1.3vw,22px)}:lang(en) .opening-level{font-size:clamp(18px,1.55vw,26px)}:lang(en) .opening-last small{font-size:clamp(13px,1.2vw,20px)}:lang(en) .opening-last{min-height:7.9vw}}
@media(max-width:680px){.opening-screen{background:#bda4ca url('./plum.webp') center/512px repeat;background-blend-mode:multiply}.opening-scene,.opening-fallback{height:36dvh;min-height:250px;max-height:330px}.opening-left{padding-top:calc(clamp(250px,36dvh,330px) - 5px)}.opening-new,.opening-history{min-height:44px}.opening-footer .language-picker button{min-height:44px}}
.opening-footer .language-picker button{min-height:44px}.opening-history{min-height:44px}

.journey-stage{position:fixed;inset:0}.opening-screen{z-index:2}.opening-utilities{position:absolute;right:3.6%;bottom:4.55%;z-index:3;display:flex;align-items:center;gap:17px}.opening-utilities .opening-history{position:static;margin:0}.opening-motion{display:grid;place-items:center;width:44px;height:44px;border:1px solid #c5a66a50;border-radius:50%;background:transparent;color:#cdb680;padding:0}.opening-motion:hover{border-color:#dcc18a}.opening-left,.opening-utilities{transition:opacity .28s ease}.is-departing .opening-left,.is-departing .opening-utilities{opacity:0;pointer-events:none}.opening-status{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(max-width:680px){.opening-utilities{position:relative;inset:auto;align-self:center;margin-top:19px;gap:12px}.opening-utilities .opening-history{min-height:44px}.opening-motion{width:44px;height:44px}}
@media(prefers-reduced-motion:reduce){.opening-left,.opening-utilities{transition:none}.is-departing .opening-left,.is-departing .opening-utilities{transform:none}}
/* Long labels stay within the ivory plate at every locale and zoom level. */
.opening-primary{white-space:nowrap;letter-spacing:.02em;box-sizing:border-box;overflow:hidden}.fit-label{display:block;min-width:0;max-width:100%;white-space:nowrap;line-height:1.2}.opening-footer .settings-trigger{width:auto;border-radius:25px;padding:9px 16px;color:#dcc7a4;font-size:15px;letter-spacing:.03em}.opening-footer{width:auto}.opening-new{line-height:1.5;white-space:normal}.opening-new svg{flex:none}
html[data-script=latin] .opening-local-name{font-size:clamp(23px,2.45vw,41px);letter-spacing:.03em;max-width:500px}html[data-script=latin] .opening-tagline{font-size:clamp(14px,1.28vw,21px);white-space:normal;max-width:450px}html[data-script=latin] .opening-primary{font-size:clamp(24px,2.05vw,36px);letter-spacing:.015em}html[data-script=latin] .opening-chapter{font-size:clamp(14px,1.4vw,24px);letter-spacing:0}html[data-script=latin] .opening-level{font-size:clamp(17px,1.7vw,29px);letter-spacing:0}html[data-script=latin] .opening-new{font-size:clamp(15px,1.35vw,23px);letter-spacing:0}
@media(max-width:680px){.opening-footer{width:auto;align-self:center;margin-top:18px;display:flex;justify-content:center}html[data-script=latin] .opening-local-name{font-size:23px}html[data-script=latin] .opening-tagline{font-size:13px}html[data-script=latin] .opening-primary{font-size:27px}html[data-script=latin] .opening-chapter{font-size:14px}html[data-script=latin] .opening-level{font-size:19px}html[data-script=latin] .opening-new{font-size:16px}}

.opening-dialog .save-tools{margin-top:18px;padding-top:17px;color:#755b49}.opening-dialog .save-tools .settings-help{font-size:12px;line-height:1.8;color:#8b7463}.opening-dialog .save-tools-actions{grid-template-columns:1fr 1fr}.opening-dialog .save-tools-actions>button{min-height:43px;font-size:13px}.opening-dialog .save-tools-title{font-size:17px}.opening-dialog .save-tools h3{display:flex;gap:8px;align-items:center;font-size:17px;font-weight:500;margin:0 0 12px}.opening-dialog .opening-archives{margin-top:20px}

/* Clip the button artwork, leaving the focus outline and label independent. */
.opening-plate.opening-primary {
 position:relative;
 isolation:isolate;
 border-radius:999px;
 background-image:none;
 overflow:visible;
}
.opening-primary::before {
 content:'';
 position:absolute;
 inset:0;
 z-index:-1;
 pointer-events:none;
 background:url('./limestone.webp') center/100% 100% no-repeat;
 clip-path:inset(4% 1% round 999px);
}
.opening-plate.opening-primary:hover:not(:disabled) {filter:none}
@media(hover:hover) {
 .opening-primary:hover:not(:disabled)::before {filter:brightness(1.06) saturate(1.08)}
 .opening-new:hover:not(:disabled),
 .opening-history:hover:not(:disabled),
 .opening-motion:hover:not(:disabled) {color:#fff0c6}
 .opening-archive:hover,
 .opening-close:hover {background-color:#b98a4b19;color:#28695f}
}
.opening-primary:active:not(:disabled)::before {filter:brightness(.96)}
.opening-primary:disabled {cursor:default}

:root{font-family:MathSong,'Songti SC','STSong','Noto Serif CJK SC',serif;color:#f5e4bb;background:#35264f;font-synthesis:none;font-optical-sizing:auto}
*{box-sizing:border-box}body{margin:0;min-width:320px;-webkit-font-smoothing:antialiased}button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}button:focus-visible{outline:2px solid #ffe6a6;outline-offset:6px}button:disabled{cursor:default;opacity:.45}button{transition:background .2s,border-color .2s,opacity .2s,box-shadow .2s}button:hover:not(:disabled){background-color:#fce6b50d}button:active:not(:disabled){background-color:#fce6b51a}.game-shell{height:100dvh;min-height:420px;overflow:hidden;position:relative;isolation:isolate}.world{position:absolute;inset:0;touch-action:none}.world canvas{display:block;width:100%;height:100%;touch-action:none}.world.dragging canvas{cursor:grabbing!important}.topbar{position:absolute;top:32px;left:36px;right:32px;display:flex;align-items:center;justify-content:space-between;pointer-events:none;z-index:5}.topbar>*{pointer-events:auto}.level-heading{display:flex;align-items:center;gap:27px}.outline-button{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:47px;padding:5px 18px;background:transparent;border:1px solid #ddc79a9c;border-radius:18px;font-size:24px;line-height:1.3;white-space:nowrap}.outline-button:hover{border-color:#ffe2a1}.menu-button{gap:13px}.header-divider{height:34px;width:1px;background:#d6c19899}h1{font-size:27px;font-weight:600;letter-spacing:2px;line-height:1.4;margin:0}.title-dot{display:inline-block;margin:0 13px}.crank-target{position:absolute;top:0;left:0;width:80px;height:80px;border:none;border-radius:50%;background:transparent!important;touch-action:none;cursor:grab;z-index:3}.crank-target:active{cursor:grabbing}.crank-target:focus-visible{outline:1px solid #f1ce83;outline-offset:1px}.crank-target.hint-pulse{box-shadow:0 0 0 2px #e8c67988;animation:hintpulse 1.8s ease-in-out infinite}.rotation-label{position:absolute;top:0;left:0;display:flex;align-items:center;justify-content:center;gap:5px;color:#f7d68d;pointer-events:none;white-space:nowrap;z-index:2}.rotation-label>span{font-size:24px;letter-spacing:2px;display:flex;gap:4px;align-items:center}.rotation-label button{pointer-events:auto;border:none;padding:3px 8px;background:transparent;display:flex;align-items:center;justify-content:center;border-radius:14px;min-width:48px;min-height:44px}.rotation-label.is-aligned{color:#f1dfa8}.game-footer{position:absolute;bottom:60px;left:20px;right:20px;display:flex;align-items:center;flex-direction:column;gap:20px;pointer-events:none;z-index:4}.instruction-row{display:flex;align-items:center;justify-content:center;gap:30px;min-height:47px;pointer-events:auto}.instruction-row p{font-size:26px;font-weight:600;letter-spacing:2px;margin:0;line-height:1.7;text-align:center}.hint-button{padding-inline:16px;font-size:24px;border-color:#f2d086}.hint-button.active{background:#e5c37c15}.go-button{border-color:#f2d086;background:#e5c37c12;min-width:110px}.hint-bubble{display:flex;align-items:center;gap:12px;max-width:calc(100vw - 40px);padding:17px 20px;border:1px solid #c9b49055;border-radius:17px;background:#302344f5;box-shadow:0 12px 36px #1d112533;pointer-events:auto;font-family:MathSong,'Songti SC',serif;animation:appear .25s ease-out}.hint-bubble p{font-size:17px;line-height:1.7;margin:0}.hint-bubble button{display:flex;border:0;background:transparent;padding:5px;margin-left:8px;border-radius:6px}.hint-bubble strong{font-weight:600;color:#ffdb8d}.modal-backdrop{position:absolute;inset:0;background:#24193480;backdrop-filter:blur(9px);display:flex;align-items:center;justify-content:center;z-index:10;animation:appear .3s ease-out}.modal{width:min(480px,calc(100vw - 40px));position:relative;padding:46px 38px;background:#382b50;border:1px solid #b7a2c14d;border-radius:26px;box-shadow:0 28px 100px #190f2f55}.close-button{position:absolute;right:20px;top:20px;border:0;background:transparent;padding:6px;display:flex;border-radius:8px}.eyebrow{font-size:13px;letter-spacing:4px;color:#c9b5d3;margin:0 0 16px}h2{font-size:30px;font-weight:500;line-height:1.5;margin:0;letter-spacing:1px}.modal-description{font-size:16px;color:#d2bfda;line-height:1.9;margin:15px 0 28px}.level-row{display:flex;align-items:center;gap:19px;text-align:left;width:100%;padding:20px 0;border:none;border-block:1px solid #c3a8d33b;background:none}.level-number{font-size:30px;color:#b59bc8}.level-row>span:nth-child(2){flex:1;display:flex;flex-direction:column;gap:6px}.level-row strong{font-weight:500;font-size:19px}.level-row small{color:#c0a9cf;font-size:13px}.coming-next{display:flex;gap:9px;align-items:center;font-size:13px;color:#b69cc4;margin:23px 0 34px}.resume{min-height:43px;font-size:16px;border-radius:13px;width:100%;gap:12px}.success{width:min(560px,calc(100vw - 40px));text-align:center;padding:44px 32px}.win-check{color:#e5c37b;margin:6px auto 20px;display:block}.success .modal-description{font-size:17px;line-height:2}.success .modal-description strong{font-weight:500;color:#f3d491}.win-actions{display:flex;align-items:center;justify-content:center;gap:26px;margin-top:30px}.solid-button{border:1px solid #f2d79d;background:#e9ce98;color:#392b4d;min-height:45px;display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:14px;padding:10px 22px;font-size:16px}.solid-button:hover:not(:disabled){background:#f3deaf}.text-button{display:inline-flex;align-items:center;gap:8px;font-size:15px;background:transparent;border:none;padding:10px;border-radius:10px}.error-state{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:25px;background:#35264f}.error-state p{color:#c9b5d3;font-size:17px}@keyframes appear{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}@keyframes hintpulse{0%,100%{box-shadow:0 0 0 1px #e8c67966}50%{box-shadow:0 0 0 10px #e8c67911}}@media(max-width:850px){.topbar{top:24px;left:24px;right:24px}.level-heading{gap:18px}.outline-button{font-size:18px;gap:8px;padding:5px 12px;min-height:43px;border-radius:15px}.outline-button svg{width:23px}.header-divider{height:28px}h1{font-size:21px;letter-spacing:1px}.title-dot{margin:0 8px}.instruction-row p{font-size:20px;letter-spacing:1px}.game-footer{bottom:40px}.instruction-row{gap:20px}.rotation-label>span{font-size:20px}}@media(max-width:540px){.game-shell{min-height:400px}.topbar{top:22px;left:17px;right:17px;align-items:flex-start}.level-heading{gap:12px;align-items:flex-start}.menu-button{padding:7px 9px}.menu-button span{display:none}.header-divider{display:none}h1{display:flex;flex-direction:column;font-size:17px;line-height:1.6;font-weight:500;letter-spacing:1px}.title-dot{display:none}.topbar>.outline-button{font-size:16px;min-height:39px;padding:6px 10px}.topbar>.outline-button svg{width:20px}.game-footer{bottom:32px;left:22px;right:22px;gap:14px}.instruction-row{flex-wrap:wrap;gap:14px}.instruction-row p{font-size:17px;line-height:1.7;letter-spacing:1px}.instruction-row .outline-button{font-size:16px;min-height:38px;padding:5px 13px}.rotation-label>span{font-size:19px}.rotation-label svg{width:28px}.rotation-label button{min-width:40px;padding:3px}.hint-bubble{padding:13px;gap:8px}.hint-bubble p{font-size:14px}.hint-bubble>svg{min-width:20px}.hint-bubble button{margin-left:0}.modal{padding:40px 26px}.success h2{font-size:25px}.success .modal-description{font-size:15px}.win-actions{gap:10px;flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

/* The user's teaching-first direction: the scene is a live demonstration. */
.game-footer{bottom:31px;gap:12px}.lesson-copy{text-align:center;max-width:760px;pointer-events:auto}.lesson-phase{font-size:12px;letter-spacing:3px;color:#bea6cc;margin:0 0 8px}.lesson-copy h2{font-size:25px;font-weight:500;line-height:1.6;letter-spacing:1.5px}.lesson-detail{font-size:15px;line-height:1.9;color:#cfbcda;margin:6px 0 0;letter-spacing:.5px}.lesson-actions{pointer-events:auto;display:flex;align-items:center;gap:25px}.lesson-actions .outline-button{font-size:16px;min-height:39px;border-radius:13px;padding:6px 14px;gap:8px}.principle-button{font-size:13px;display:flex;gap:9px;align-items:center;border:none;background:none;padding:8px;border-radius:8px;color:#cfbcda}.principle-modal{width:min(560px,calc(100vw - 40px))}.principle-modal h2{font-size:26px}.principle-modal .modal-description{font-size:15px;margin-bottom:20px}.principle-list{list-style-position:inside;padding:0;margin:0 0 27px;counter-reset:principle}.principle-list li{padding:12px 0;border-top:1px solid #c3a8d32b;font-size:16px;font-weight:500}.principle-list li p{font-weight:400;font-size:14px;color:#c5afcf;line-height:1.8;margin:6px 0 0;padding-left:20px}.principle-modal .solid-button{width:100%}.knowledge-summary{text-align:left;border-top:1px solid #c3a8d32b;border-bottom:1px solid #c3a8d32b;padding:5px 0}.knowledge-summary p{display:grid;grid-template-columns:82px 1fr;gap:10px;margin:15px 0;font-size:15px;line-height:1.8}.knowledge-summary span{color:#bea6cc}.knowledge-summary strong{font-weight:400;color:#f1ddb4}.hint-bubble{padding:12px 17px}.hint-bubble p{font-size:15px}
@media(max-width:850px){.lesson-copy{max-width:660px}.lesson-copy h2{font-size:22px}.lesson-detail{font-size:14px}.game-footer{bottom:27px}.lesson-phase{font-size:11px}}
@media(max-width:540px){.game-footer{bottom:22px;gap:12px}.lesson-copy h2{font-size:19px;letter-spacing:.5px}.lesson-phase{font-size:10px;margin-bottom:6px}.lesson-detail{font-size:13px;max-width:330px;margin:5px auto 0}.lesson-actions{gap:10px;flex-wrap:wrap;justify-content:center}.lesson-actions .outline-button{font-size:14px;min-height:37px}.principle-button{font-size:12px;gap:5px}.principle-modal{padding:35px 24px;max-height:calc(100dvh - 32px);overflow:auto}.principle-modal h2{font-size:22px}.principle-modal .modal-description{font-size:14px}.knowledge-summary p{font-size:14px;grid-template-columns:70px 1fr}.success .modal-description{margin-bottom:18px}}
.save-loading{min-height:100dvh;display:grid;place-items:center;background:#35264f;color:#ead8bd;font-family:MathSong,serif;font-size:17px;letter-spacing:1px}
/* Original CSS replaces all excluded upstream image frames. */
.paper-art,.teaching-paper-art{background:#f1e2c9 url('./limestone.webp') center/420px;border:2px solid #bd9d71;border-radius:18px;box-shadow:inset 18px 0 25px #a8874f22,0 15px 45px #1b102f35}
.journal-frame{background:linear-gradient(90deg,#e8d8bb 0%,#f5ead4 47%,#c9b58f 49.8%,#ecdec5 51%,#f6ead4 100%);border:6px solid #796071;border-radius:18px;box-shadow:0 24px 70px #190d2b60,inset 0 0 0 2px #d3b06e}
.compass-ring{position:absolute;inset:5px;display:block;border:3px double #d4b982;border-radius:50%;background:radial-gradient(circle,#392741 52%,#7d6176 54%,#38253f 60%);box-shadow:0 4px 15px #20102a55}
.compass-ring:before,.compass-ring:after{content:'';position:absolute;left:50%;top:8%;height:84%;width:1px;background:#d7b36a44;transform:rotate(45deg)}.compass-ring:after{transform:rotate(-45deg)}
.opening-plate,.journal-cta,.paper-primary,.paper-book,.settings-footer>button,.notebook-action.paper-primary,.teaching-continue{background-image:linear-gradient(135deg,#775369,#4b354f)!important;border:1px solid #bb9960!important;border-radius:12px!important;box-shadow:inset 0 0 0 3px #d0b27822;color:#f7e2b9!important}
.opening-primary{background-image:linear-gradient(135deg,#f3e5c8,#cfb797)!important;color:#4b3448!important;box-shadow:inset 0 0 0 3px #a98b5d33,0 8px 24px #1d102e40}
.opening-title h1{letter-spacing:.055em}.opening-footer a{color:#dcc99b;font-size:12px}.opening-footer{gap:12px}.paper-content,.journal-pages{scrollbar-color:#ad9568 transparent}