@font-face{font-family:Wenkai;src:url('/fonts/xwh-hand-wenkai.woff2')}*{box-sizing:border-box} :root{color-scheme:light;--ink:#203c32;--paper:#faf8f1;--line:#d8d2c6}body{margin:0;color:var(--ink);font:16px/1.5 -apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif;background:#e1d4bd;min-height:100svh;overflow-x:hidden}button,input{font:inherit}button{cursor:pointer;white-space:nowrap;color:inherit;border:1px solid #bcbcaf7d;background:#faf8f0d9;border-radius:14px;padding:10px 19px;transition:background .18s,transform .18s}button:hover{background:#fffdf7;transform:translateY(-1px)}button:disabled{cursor:wait;opacity:.5;transform:none}.primary{background:#244b3b;color:#fffdf5;border-color:#244b3b}.primary:hover{background:#315e49}button:focus-visible,input:focus-visible,canvas:focus-visible{outline:3px solid #708654;outline-offset:4px}[hidden]{display:none!important}.room{position:fixed;inset:0;background:url('./study-assets/room-unframed.webp') center/cover no-repeat;z-index:-1;transition:transform 1.2s ease}header{position:relative;z-index:4;display:flex;align-items:center;justify-content:space-between;padding:25px 2.7vw;gap:20px}.brand{display:flex;align-items:center;gap:11px;color:#20342c;text-decoration:none;font-size:25px;font-weight:600;background:#fffbedc7;padding:3px 12px 3px 4px;border-radius:13px}.brand img{width:40px;height:40px;border-radius:9px}.brand span{font-size:15px;font-weight:400;border-left:1px solid #56635077;padding-left:16px;margin-left:7px}nav{display:flex;gap:12px}nav button{border-radius:30px}.stage{position:relative;min-height:calc(100svh - 215px)}.leo-zone{position:fixed;left:0;bottom:0;width:36vw;height:75vh;pointer-events:none;z-index:2;transition:width 1s,left 1s}#leo{width:100%;height:100%}#leo canvas{display:block;width:100%;height:100%;filter:drop-shadow(0 10px 15px #47352030)}#leo-loading{position:absolute;inset:10% 10% 12%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center}#leo-loading img{width:100%;max-height:90%;object-fit:contain;filter:drop-shadow(0 10px 18px #33241333)}#leo-loading span{font-size:13px;background:#fff9e9ed;border-radius:20px;padding:7px 14px}.leo-label{position:absolute;bottom:20%;left:23%;display:flex;align-items:center;gap:8px;color:#fffdf6;background:#2c3e32bf;padding:8px 14px;border-radius:30px;font-size:14px}.leo-label i{width:7px;height:7px;border-radius:50%;background:#d9dfb8}.wall{position:relative;margin-left:36%;width:58%;background:#faf7eef0;border:7px solid #c2986c;box-shadow:inset 0 0 15px #5f4e3219,0 3px 9px #49382340;transition:margin 1s,width 1s;border-radius:2px}.welcome{min-height:56vh;margin-top:2vh;display:flex;align-items:center;padding:4.4vw 3.6vw;overflow:hidden}.welcome-copy{position:relative;z-index:1;max-width:80%}.eyebrow{font-size:12px;letter-spacing:2px;margin:0 0 13px;color:#68765f}h1{font-family:Wenkai,'Songti SC',serif;font-weight:500;font-size:clamp(32px,3.4vw,61px);line-height:1.3;margin:0 0 15px}.intro{font-family:Wenkai,'Songti SC',serif;font-size:clamp(21px,2vw,32px);line-height:1.5;margin:8px 0 25px;max-width:40ch}.grades{display:grid;grid-template-columns:repeat(2,minmax(100px,1fr));gap:12px;max-width:435px}.grades button{min-height:56px;background:#fdfcf5dd;font-size:17px}.grades button.selected,.interests button.selected{background:#dce5d6;border-color:#65816a}.welcome-hint,.subtle{color:#687065;font-size:15px;margin:22px 0 12px}.interests{display:flex;gap:10px}.explore{margin-top:15px}.pilot{font-size:12px;color:#78816f;margin:20px 0 0}#welcome-cube{position:absolute;right:12px;top:15%;width:240px;height:240px;opacity:.32;mix-blend-mode:multiply}.classroom{margin-left:27%;width:69%;padding:24px 28px;margin-top:0}.classroom h1{font-size:clamp(28px,2.8vw,46px);margin:0}.lesson-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.lesson-heading .eyebrow{margin:0 0 4px}.problem{font-size:clamp(14px,1.12vw,19px);line-height:1.65;margin:16px 0 12px;max-width:72ch}#board{display:block;width:100%;height:clamp(230px,32vh,420px);border:1px solid var(--line);border-radius:9px;touch-action:none;cursor:grab}.board-controls{display:flex;align-items:center;gap:14px;padding:12px 0;font-size:14px}.board-controls label{white-space:nowrap}.board-controls input{min-width:60px;flex:1;accent-color:#315640}.board-controls output{white-space:nowrap;font-variant-numeric:tabular-nums}.board-controls button{padding:6px 13px;border-radius:10px}.board-step{display:flex;gap:16px;align-items:flex-start;border:1px solid #cdd3bf;border-radius:9px;background:#e6eadc8c;padding:13px 16px;font-size:16px}#step{font-size:12px;color:#fff;background:#486745;padding:6px 11px;border-radius:7px;white-space:nowrap}#notes p{margin:5px 0 0;font-size:15px;color:#4e624d}.teacher-line{display:flex;align-items:flex-start;gap:13px;padding-top:12px;font-size:15px}.teacher-line>span{font-size:11px;letter-spacing:1.5px;margin-top:4px;color:#6d7a60}.teacher-line p{margin:0;flex:1}.teacher-line button{font-size:12px;padding:5px 10px}footer{position:relative;z-index:5;width:min(770px,80vw);margin:24px auto 0;padding-bottom:24px}#reply-form{display:flex;align-items:center;gap:12px;background:#fffdf4f5;border:1px solid #f5eed9;border-radius:45px;padding:9px 11px;box-shadow:0 8px 25px #4535191c}#record{width:49px;height:49px;border:0;border-radius:50%;background:#284b3b;color:white;padding:13px;flex:none}#record svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.7}#record.recording{background:#a14435}#reply{min-width:0;flex:1;background:transparent;border:0;outline-offset:0;color:var(--ink);font-size:16px;padding:8px}#send{border-radius:30px;padding:10px 22px}.below-input{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px 12px;font-size:12px;padding-top:9px;color:#3e4f3a}.below-input button{background:#fff9e0b8;padding:3px 9px;font-size:12px;border-radius:20px}#status{background:#fff9e0d4;border-radius:12px;padding:2px 10px}#timer{font-variant-numeric:tabular-nums}.private{position:fixed;bottom:9px;left:12px;font-size:10px;color:#3e4f3a;background:#fffbe6b8;padding:2px 7px;border-radius:10px}.learning .room{transform:scale(1.055) translateX(-1.5%)}.learning .leo-zone{width:30vw;left:-3vw}.learning footer{margin-top:20px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}dialog{max-width:660px;width:92vw;max-height:80vh;border:1px solid #d2cbb9;border-radius:20px;padding:26px;background:#faf8ef;color:var(--ink)}dialog::backdrop{background:#20382cc0}dialog h2{font-family:Wenkai,serif;font-size:26px;margin:0}#close-history{position:absolute;top:20px;right:20px}#messages{margin-top:30px}.message{padding:14px 0;border-bottom:1px solid #dedbcc}.message small{display:block;color:#6f7b65;font-size:11px;letter-spacing:1px;margin-bottom:6px}.message p{margin:6px 0}.message button{font-size:12px;margin-top:8px}@media(min-width:1600px){.welcome{min-height:57vh}.classroom{padding:30px 40px}}@media(max-width:1000px){.brand span{display:none}.wall{margin-left:30%;width:66%}.welcome{padding:35px 25px}.welcome-copy{max-width:100%}.classroom{margin-left:23%;width:74%;padding:20px}h1{font-size:34px}.board-controls{gap:8px;flex-wrap:wrap}.board-controls input{flex-basis:28%}.leo-zone{left:-5%;width:37%}.teacher-line{font-size:14px}header{padding:18px 22px}.stage{min-height:calc(100svh - 230px)}}@media(max-width:650px){body{background:#ebe1cf}.room{background-position:25% center;opacity:.7}header{padding:15px 14px;gap:10px}.brand{font-size:20px;gap:5px}.brand img{width:31px;height:31px}nav{gap:6px}nav button{padding:8px 11px;font-size:12px}.stage{min-height:0;padding-top:170px}.leo-zone,.learning .leo-zone{position:absolute;top:50px;left:4px;bottom:auto;height:210px;width:165px;z-index:1}.leo-label{left:12%;bottom:0;padding:5px 10px;font-size:11px;white-space:nowrap}#leo-loading{inset:0 5% 0}#leo-loading span{display:none}.wall,.classroom{margin:0 12px;width:calc(100% - 24px);border-width:5px;padding:22px;z-index:2}.welcome{min-height:0}.welcome-copy{width:100%}.welcome h1{font-size:36px}.intro{font-size:23px}.grades{gap:9px}.grades button{min-height:49px;font-size:15px}.eyebrow{font-size:10px}.pilot{margin-bottom:0}.classroom{padding:16px 13px}.classroom h1{font-size:26px}.lesson-heading{align-items:flex-start}.lesson-heading>button{font-size:11px;padding:6px 9px;border-radius:8px}.classroom .eyebrow{font-size:10px}.problem{font-size:13px;margin:12px 0}#board{height:300px}.board-controls{font-size:12px;gap:8px}.board-controls label{flex-basis:70px}.board-controls input{flex-basis:40%}.board-controls output{flex:1}.board-controls button{font-size:12px}.board-step{padding:10px;gap:9px;font-size:14px}#notes p{font-size:13px}.teacher-line{font-size:14px}.teacher-line>span{display:none}footer,.learning footer{width:auto;margin:18px 12px 0;padding-bottom:32px}#reply-form{gap:5px;padding:7px}#record{width:43px;height:43px;padding:10px}#reply{font-size:14px;padding:5px}#send{font-size:14px;padding:9px 15px}.below-input{justify-content:flex-start;font-size:11px;gap:6px}#welcome-cube{right:-60px;top:30px}.private{font-size:9px}.learning .stage{padding-top:150px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}

.welcome.has-dialogue .intro{font-size:clamp(21px,1.55vw,28px);max-width:27ch}.welcome.has-dialogue .grades{display:none}.welcome.has-dialogue #welcome-cube{opacity:.14}.welcome-copy{max-width:78%}@media(max-width:650px){.welcome-copy{max-width:100%}.welcome.has-dialogue .intro{font-size:22px}#welcome-cube{display:none}}
@media(min-width:1001px){header{padding-top:18px;padding-bottom:18px}.stage{min-height:calc(100svh - 240px)}.learning .stage{min-height:0}.classroom{padding:20px 30px}.classroom h1{font-size:clamp(29px,2.5vw,42px)}#board{height:clamp(230px,32vh,360px)}.board-step{padding:10px 14px}#notes{display:flex;flex-wrap:wrap;gap:3px 18px}#notes p{margin:0;font-size:14px;line-height:1.45}.teacher-line{font-size:14px;line-height:1.5}.learning footer{margin-top:16px;padding-bottom:16px}}
@media(max-width:650px){body{padding-bottom:150px}.leo-zone,.learning .leo-zone{top:63px;left:17px;height:130px;width:112px}.leo-label{left:108px;bottom:25px;color:#294834;background:#fff9e9dc}.stage,.learning .stage{padding-top:122px}.lesson-heading{display:block}.lesson-heading>button{position:absolute;right:14px;top:12px}.classroom h1{font-size:25px;margin-top:13px}#board{height:260px}footer,.learning footer{position:fixed;bottom:0;left:0;right:0;margin:0;padding:9px 10px 12px;background:#f7f2e8f0;backdrop-filter:blur(10px);border-top:1px solid #d2c9b5}.below-input{gap:3px 7px}#status{flex-basis:100%;padding:0;background:transparent}.private{display:none}}
#jxgbox{width:100%;height:clamp(260px,34vh,400px);border:1px solid #d8d2c6;border-radius:9px;background:#fffdf7;touch-action:none;overflow:hidden}#board-panel .hidden{display:none!important}#board-notes .bl-givens,#board-notes .bl-spine,#board-notes .bl-look,#board-notes .bl-result{display:none}#board-notes .bl-title{font-weight:600;font-size:16px;display:flex;gap:12px}#board-notes .bl-k{font-size:11px;font-weight:400;color:#75816d}#board-notes .note-line{font-size:15px;line-height:1.6}#board-notes{margin:10px 0;padding:10px 14px;border:1px solid #d1d8c6;border-radius:8px;background:#e9edde99}#board-notes .bl-body{display:flex;flex-wrap:wrap;gap:4px 16px}#board-facts .bw-solid-camera{display:flex;align-items:center;gap:8px;padding:7px 0;font-size:12px}#board-facts button{font-size:12px;padding:3px 10px}.board-step{display:none}@media(max-width:650px){#jxgbox{height:270px}#board-notes .bl-title{font-size:14px}#board-notes .note-line{font-size:13px}}
#board-facts:empty{display:none}#jxgbox{height:clamp(280px,33vh,380px)}@media(max-width:650px){#jxgbox{height:440px}}

@media(max-width:650px){.leo-zone,.learning .leo-zone{top:0;height:122px}.leo-label{bottom:24px}}
/* First visit: conversation, one recommendation, then the real classroom. */
.about-link{color:#344b39;text-decoration:none;font-size:14px;padding:9px 12px}.about-link:hover{text-decoration:underline}
.arrival-steps{display:flex;gap:24px;list-style:none;padding:0;margin:0 0 30px;color:#8b8d7d;font-size:12px;counter-reset:arrival}.arrival-steps li{counter-increment:arrival;display:flex;gap:8px;align-items:center}.arrival-steps li:before{content:'0' counter(arrival);font-size:10px}.arrival-steps [aria-current]{color:#254d37;font-weight:600}.arrival-steps .complete{color:#587254}
.welcome h1{margin-bottom:16px}.welcome .intro{font-size:clamp(23px,2vw,32px);line-height:1.6;margin-bottom:18px}#arrival-question{font-size:17px;margin:10px 0 20px}.welcome-copy{max-width:100%}.welcome-hint{max-width:48ch;line-height:1.7}.learner-context{display:flex;align-items:center;gap:14px;margin-bottom:18px;font-size:12px;color:#59684f}.learner-context[hidden]{display:none}#change-preference{padding:4px 8px;background:transparent;border:0;text-decoration:underline;font-size:12px}.recommendation{display:grid;grid-template-columns:1fr 1.1fr;gap:16px;border-top:1px solid #d9ddce;border-bottom:1px solid #d9ddce;margin:22px 0;padding:20px 0}.recommendation[hidden]{display:none}.recommendation h2{font-family:Wenkai,serif;font-size:28px;line-height:1.4;font-weight:400;margin:7px 0 10px}.recommendation p{font-size:13px;line-height:1.7}.recommendation .eyebrow{font-size:10px}.lesson-meta{font-size:10px;color:#64775e}#recommendation-board{height:240px;min-width:0;border-radius:12px;overflow:hidden;cursor:grab}.welcome .explore{padding:14px 23px;margin:0 0 12px}.welcome .pilot{font-size:11px;color:#6d7863;line-height:1.6}.welcome.has-dialogue .intro{max-width:100%}.welcome:has(.recommendation:not([hidden])){padding-top:28px;padding-bottom:24px}.welcome:has(.recommendation:not([hidden])) .arrival-steps{margin-bottom:20px}.welcome:has(.recommendation:not([hidden])) h1{font-size:32px}.welcome:has(.recommendation:not([hidden])) .intro{font-size:21px}
:focus-visible{outline:2px solid #356349;outline-offset:4px}
@media(max-width:1000px){.recommendation{grid-template-columns:1fr}#recommendation-board{height:270px}.arrival-steps{gap:14px}}
@media(max-width:650px){.about-link{font-size:11px;padding:5px}.arrival-steps{font-size:10px;gap:13px;margin-bottom:20px}.arrival-steps li{gap:4px}.welcome .intro{font-size:22px}.recommendation h2{font-size:25px}.welcome:has(.recommendation:not([hidden])){padding:20px}.recommendation{gap:4px;margin:16px 0;padding:15px 0}#recommendation-board{height:330px}.welcome .explore{width:100%;font-size:14px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
@media(min-width:1001px){.welcome:has(.recommendation:not([hidden])) .arrival-steps{margin-bottom:12px}.welcome:has(.recommendation:not([hidden])) h1{font-size:28px;margin:4px 0 10px}.welcome:has(.recommendation:not([hidden])) .intro{font-size:19px;line-height:1.5;margin:10px 0}.welcome:has(.recommendation:not([hidden])) .learner-context{margin-bottom:8px}.welcome:has(.recommendation:not([hidden])) .welcome-hint{margin:10px 0}.recommendation{padding:12px 0;margin:14px 0}.recommendation h2{font-size:25px}#recommendation-board{height:210px}.welcome:has(.recommendation:not([hidden])) .pilot{margin:4px 0}}
@media(max-width:650px){.brand{white-space:nowrap;flex-shrink:0}.about-link{display:none}}
#voice-control{display:flex;justify-content:center}#voice-control #record{display:grid;grid-template-columns:30px 1fr;column-gap:14px;align-items:center;width:min(100%,410px);height:auto;min-height:76px;border:1px solid #ffffff70;border-radius:42px;padding:14px 26px;background:#284b3b;color:#fffdf4;box-shadow:0 8px 28px #243e3029;text-align:left}#voice-control #record svg{grid-row:1 / 3;width:28px;height:28px}#voice-label{font-size:17px;font-weight:500}#voice-hint{font-size:11px;opacity:.78;margin-top:4px}#voice-control #record.recording{background:#854b3e}#voice-control #record:disabled{opacity:.72;cursor:wait}#voice-control #record.recording svg{fill:#fffdf422}@media(max-width:650px){#voice-control #record{min-height:66px;padding:11px 22px;width:100%}#voice-label{font-size:16px}}
.lesson-progress{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:13px;margin:12px 0;color:#31553e}.lesson-progress button{font-size:12px;padding:6px 12px}#board-notes{max-height:250px;overflow:auto}#board-notes .bl-step{padding:9px 0;border-bottom:1px solid #cfd6c5}#board-notes .bl-step:last-child{border-bottom:0}#board-notes .bl-body{display:block}#board-notes .note-line{margin:3px 0}
.lesson-map{display:grid;grid-template-columns:repeat(3,1fr);list-style:none;gap:8px 14px;padding:14px 0;margin:0;border-bottom:1px solid #d1d8c6;font-size:12px}.lesson-map li{padding:5px 0;color:#77806e}.lesson-map .current{color:#274f38;font-weight:700;border-bottom:2px solid #487657}.lesson-map .done{color:#486b49}@media(max-width:650px){.lesson-map{grid-template-columns:repeat(2,1fr);font-size:11px}}

/* Keep the normal Tutor ledger readable in the room shell. */
#board-notes .bl-givens,#board-notes .bl-spine,#board-notes .bl-look,#board-notes .bl-result{display:block}
/* The classroom uses the existing Tutor slide presenter, not a scrolling ledger. */
body.learning{height:100dvh;overflow:hidden;padding:0;display:flex;flex-direction:column}
.learning header{flex:0 0 auto;padding-top:12px;padding-bottom:12px}
.learning .stage{flex:1;min-height:0!important;padding:0 0 8px!important;display:flex}
.learning .classroom{height:100%;min-height:0;display:flex;flex-direction:column;gap:8px;padding:14px 22px;overflow:hidden;box-sizing:border-box}
.learning .classroom h1{font-size:clamp(22px,2vw,32px);margin:0}
.learning .classroom .eyebrow{margin:0 0 4px}
.learning .problem{flex:none;font-size:13px;line-height:1.5;margin:0}
.learning #board-panel.board-paged{flex:1 1 0!important;height:auto!important;min-height:0!important;padding:0!important;gap:6px}
.learning #board-page-stage{min-height:0;grid-template-columns:1fr;grid-template-rows:minmax(140px,1.2fr) minmax(100px,1fr);gap:6px}
.learning #board-page-stage:has(#jxgbox.hidden){grid-template-rows:1fr}
.learning #board-notes{overflow:hidden!important;border:0;padding:4px!important}
.learning #board-notes .bl-title{font-size:16px!important;line-height:1.4!important}
.learning #board-notes .note-line,.learning #board-notes .bl-result{font-size:16px!important;line-height:1.5!important}
.learning #board-notes .bl-card{padding:10px!important}
.learning #lesson-map,.learning .board-controls,.learning #board-page-nav [data-pdf]{display:none!important}
.learning .lesson-progress{margin:0;flex:none;font-size:12px}
.learning .teacher-line{flex:none;margin:0;padding:6px 0;min-height:62px;font-size:13px;line-height:1.5;align-items:flex-start}
.teacher-copy{flex:1;min-width:0}.teacher-copy p{margin:0}
#teacher-pages{display:flex;align-items:center;gap:8px;font-size:11px}#teacher-pages[hidden]{display:none}#teacher-pages button{padding:2px 8px;font-size:11px}
.learning footer{position:static;flex:none;margin:0 3% 0 28%;width:69%;padding:4px 0 8px;background:transparent;border:0}
.learning #voice-control{max-width:440px}.learning #record{min-height:52px}
.learning #status{font-size:11px}.learning .below-input{margin-top:4px}
@media(max-width:650px){.learning .leo-zone{display:none}.learning header{padding:8px 12px}.learning .classroom{margin:0 8px;width:calc(100% - 16px);padding:10px;border-width:4px}.learning .lesson-heading{display:flex}.learning .lesson-heading>button{position:static}.learning .classroom h1{font-size:20px;margin:0}.learning .problem{font-size:12px}.learning footer{margin:0 10px;width:auto}.learning #board-page-stage{grid-template-rows:minmax(100px,1fr) minmax(95px,1fr)}.learning .board-page-nav button{min-height:34px;padding:4px 10px}.learning .teacher-line{font-size:12px}.learning #board-notes .note-line{font-size:15px!important}}

.learning [data-slide-hidden]{display:none!important}
#board-navigation{display:flex;align-items:center;justify-content:center;gap:12px;padding:10px 0;border-top:1px solid #d7d3c5;border-bottom:1px solid #d7d3c5}
#board-navigation[hidden]{display:none!important}
#board-navigation span{min-width:90px;text-align:center;font-size:14px;font-weight:600}
#board-navigation button{padding:7px 12px;border-radius:10px;font-size:13px}
#board-navigation #board-next:not(:disabled){background:#345c46;color:#fff}
@media(max-width:650px){#board-navigation{gap:6px}#board-navigation span{min-width:72px;font-size:12px}#board-navigation button{padding:6px 8px;font-size:11px}}
.mia-entry{margin-top:16px;padding:12px 18px;background:#e8ddce;color:#354e43;border:1px solid #b9bdac;border-radius:16px;cursor:pointer}
#mia-class[hidden]{display:none!important}.mia-learning .room{background-image:url('/call-mia/media/louvre-gallery-1600-ced6a8e56d14.webp')}.mia-learning .leo-zone{visibility:hidden}.mia-learning #classroom{margin-left:0}.mia-learning #board-panel{display:none!important}.mia-learning .lesson-progress{display:none!important}
#mia-class{flex:1;min-height:0;display:flex;align-items:center;gap:20px;overflow:hidden}.mia-portrait{width:100px;height:100px;object-fit:cover;border-radius:50%;align-self:flex-start;margin-top:20px}.mia-scene{flex:1;min-width:0;min-height:0;max-height:100%;display:flex;flex-direction:column;align-items:center;text-align:center}.mia-scene>img{width:100%;max-height:38dvh;object-fit:contain}.mia-scene p{margin:6px 0}#mia-target{font-size:clamp(18px,2vw,30px);font-weight:600}#mia-meaning,#mia-progress{font-size:13px;color:#687462}
@media(max-width:600px){#mia-class{gap:6px}.mia-portrait{width:45px;height:45px}.mia-scene>img{max-height:26dvh}#mia-target{font-size:17px}.mia-entry{margin-top:8px}.mia-learning .problem{font-size:11px}}
body.learning.mia-learning #board-panel{display:none!important}
#world-class[hidden]{display:none!important}#world-class{position:relative;flex:1;min-height:0;display:flex;flex-direction:column;gap:8px}#world-canvas{width:100%;height:100%;flex:1;min-height:0;touch-action:none;border-radius:16px}#world-places{display:flex;gap:8px;flex-wrap:wrap}#world-places button{padding:6px 10px;font-size:12px}.mia-learning .classroom{margin-left:0!important}

#account-gate{max-width:min(440px,90vw);border:1px solid #d7d8cc;border-radius:24px;padding:28px;background:#faf8ef;color:#234b40}#account-gate::backdrop{background:#152d2866;backdrop-filter:blur(8px)}#account-gate p{line-height:1.7}#account-gate button{margin-top:12px;display:block}
/* Arrival and recommendation remain one screen, just like the classroom. */
body:not(.learning){height:100dvh;overflow:hidden;display:flex;flex-direction:column}
body:not(.learning) header{padding-top:12px;padding-bottom:12px;flex:none}
body:not(.learning) .stage{flex:1;min-height:0;padding:0;display:flex}
body:not(.learning) .welcome{height:100%;min-height:0;margin-top:0;padding:20px 28px;align-items:center}
body:not(.learning) .welcome-copy{max-width:100%;width:100%}
body:not(.learning) footer{flex:none;width:58%;margin:8px 6% 0 36%;padding-bottom:12px}
body:not(.learning) .arrival-steps{margin-bottom:14px}
body:not(.learning) h1{font-size:34px;margin-bottom:8px}
body:not(.learning) .intro{font-size:23px;margin:6px 0 12px}
body:not(.learning) .grades{gap:8px;max-width:none}
body:not(.learning) .grades button{min-height:42px;padding:6px 12px;font-size:15px}
body:not(.learning) .welcome-hint{margin:10px 0 4px;font-size:13px}
body:not(.learning) .mia-entry{margin-top:8px;padding:8px 10px;font-size:12px}
body:not(.learning) .pilot{margin-top:10px;font-size:10px}
body:not(.learning) #record{min-height:58px;padding:9px 20px}
.welcome:has(.recommendation:not([hidden])) .grades,.welcome:has(.recommendation:not([hidden]))>.welcome-copy>h1,.welcome:has(.recommendation:not([hidden])) .intro,.welcome:has(.recommendation:not([hidden])) .welcome-hint{display:none}
body:not(.learning) .recommendation{grid-template-columns:1fr 1fr;margin:10px 0;padding:10px 0}
.recommendation:has(#recommendation-board[hidden]){grid-template-columns:1fr!important}
body:not(.learning) #recommendation-board{height:170px}
@media(max-width:650px){body:not(.learning) .leo-zone{top:54px;left:0;width:95px;height:125px}body:not(.learning) .leo-label{display:none}body:not(.learning) .welcome{margin:0 8px;width:calc(100% - 16px);padding:14px 16px;align-items:center}body:not(.learning) footer{width:auto;margin:6px 10px 0}body:not(.learning) h1{font-size:28px}body:not(.learning) .intro{font-size:19px}body:not(.learning) .eyebrow{font-size:9px}body:not(.learning) .leo-zone{z-index:0}body:not(.learning) .recommendation{grid-template-columns:1fr}body:not(.learning) #recommendation-board{height:130px}body:not(.learning) .recommendation-copy p{margin:4px 0}}

#leo-moment{position:absolute;left:12%;right:8%;top:4%;margin:0;padding:14px 18px;background:#fffaf0f5;border:1px solid #e4dac6;border-radius:20px 20px 20px 4px;font-size:15px;line-height:1.6;box-shadow:0 8px 25px #29433118;z-index:6}#leo-hello{position:absolute;bottom:10%;left:20%;pointer-events:auto;border-radius:30px;font-size:12px;background:#fff8e6ed;padding:7px 12px}.learning #leo-hello{display:none}@media(max-width:650px){#leo-hello,#leo-moment{display:none}}

.concept-learning #board-panel,.concept-learning .lesson-progress{display:none!important}#concept-panel{flex:1;min-height:0;display:flex;flex-direction:column;gap:8px}#concept-art{flex:1;min-height:0;overflow:hidden}#concept-art>*,#concept-art svg{width:100%;max-height:100%;height:100%}#concept-title{font-size:22px;margin:0}#concept-copy{margin:0;font-size:15px}#concept-panel nav{justify-content:center;align-items:center;font-size:12px}#concept-panel button{padding:5px 12px}
body.learning.concept-learning #board-panel.board-paged{display:none!important}
body.learning.concept-learning #concept-panel{flex:1 1 0;overflow:hidden;min-height:0}
body.learning.concept-learning #concept-art{flex:1 1 0;min-height:160px}
body.learning.concept-learning #concept-art>div{height:100%;min-height:0}
@media(max-height:760px){body.concept-learning #bq-text{display:none}body.concept-learning #concept-title{font-size:18px}body.concept-learning #concept-copy{font-size:13px}body.concept-learning #concept-art [aria-label^="三维分子"]{min-height:110px!important}}
body.concept-learning #bq-text{display:none}
#concept-art{display:grid;place-items:center}#concept-art>svg{height:100%!important;margin:0!important;max-height:100%;object-fit:contain}
/* A question-only slide shows the real givens, never an empty ledger. */
body.learning #board-panel[data-page-index="-1"] #board-page-stage:has(#jxgbox.hidden) .bl-givens{display:block!important;border:0;padding:24px;font-size:clamp(18px,2vw,25px);line-height:1.9}
body.learning #board-panel[data-page-index="-1"] #board-page-stage:not(:has(#jxgbox.hidden)){grid-template-rows:1fr}
body.learning #board-panel[data-page-index="-1"] #board-page-stage:not(:has(#jxgbox.hidden)) #board-notes{display:none!important}
header>a:last-child{color:#355942;font-size:12px;text-decoration:none}
@media(max-height:800px){
 body.learning header{padding-top:6px;padding-bottom:6px}
 body.learning .classroom{gap:5px;padding-top:10px;padding-bottom:10px}
 body.learning .classroom .eyebrow{display:none}
 body.learning:has(#board-panel[data-page-index]:not([data-page-index="-1"])) #bq-text{display:none}
 body.learning .teacher-line{min-height:44px;font-size:12px;padding:4px 0}
 body.learning #voice-control #record{min-height:52px;padding:7px 20px}
 body.learning #voice-hint{margin-top:0}
 body.learning .board-page-nav{padding-top:6px}
 body.learning .board-page-nav button{min-height:36px;padding:5px 12px}
}

.music-toggle{position:fixed;right:max(14px,env(safe-area-inset-right));bottom:max(14px,env(safe-area-inset-bottom));z-index:30;width:38px;height:38px;min-height:38px;padding:0;display:grid;place-items:center;border-radius:50%;border:1px solid #ffffff70;background:#faf8ef45;color:#28483b;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);font:23px Georgia,serif;box-shadow:0 3px 15px #203e3214;cursor:pointer}.music-toggle:hover{background:#faf8efb0}.music-toggle:focus-visible{outline:2px solid #426650;outline-offset:3px}.music-toggle.music-off::after{content:"";position:absolute;width:23px;height:1.5px;background:currentColor;transform:rotate(-45deg)}

#sound{width:48px;height:48px;padding:9px;display:grid;place-items:center;border-radius:50%;color:#315943;background:linear-gradient(145deg,#ffffffd9,#f1f5e77a);border:1px solid #ffffffb0;box-shadow:inset 0 1px 1px #fff,0 5px 18px #213d2614;backdrop-filter:blur(18px);transition:transform .2s,background .2s}#sound:hover{transform:translateY(-1px);background:#fff}#sound:focus-visible{outline:2px solid #436b50;outline-offset:3px}#sound .sound-slash{display:none}#sound.is-muted .sound-slash{display:block}#sound.is-muted .sound-waves{display:none}#sound.is-muted{color:#758173}

#record .mic-level{display:none;position:absolute;left:24px;top:50%;transform:translateY(-50%);height:36px;width:32px;align-items:center;justify-content:center;gap:3px;pointer-events:none}#record .mic-level i{display:block;width:4px;border-radius:4px;background:#ebf8d8;height:calc(3px + var(--mic-level,0)*22px);transition:height 80ms linear;box-shadow:0 0 8px #d8efb340}#record .mic-level i:nth-child(2),#record .mic-level i:nth-child(4){height:calc(4px + var(--mic-level,0)*30px)}#record .mic-level i:nth-child(3){height:calc(5px + var(--mic-level,0)*35px)}#record.recording .mic-level{display:flex}#record.recording>svg{opacity:0}#record.recording{box-shadow:0 0 0 calc(1px + var(--mic-level,0)*7px) #d7ecb526,0 0 22px #bad89a32;position:relative}@media(prefers-reduced-motion:reduce){#record .mic-level i{transition:none}}

/* The real WebGL Leo has alpha; never show an opaque portrait while it loads. */
#leo-loading{pointer-events:none}#leo-loading img{display:none}#leo{background:transparent}

/* Recommended problems wait for the learner before exposing any solution. */
.problem-observation #jxgbox,.problem-observation #board-facts,.problem-observation #board-notes,.problem-observation .board-controls,.problem-observation .board-step,.problem-observation #lesson-map,.problem-observation #board-page-nav{display:none!important}
#problem-observation{height:100%;min-height:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#62745d}#problem-observation[hidden]{display:none}.observation-diagram{flex:1;width:100%;min-height:120px;max-height:420px}#problem-observation>p{font-size:clamp(18px,2vw,28px);margin:16px;text-align:center}
body.learning.problem-observation #board-panel{flex:1 1 0!important;height:auto!important;min-height:0!important;display:flex;flex-direction:column;overflow:hidden}body.problem-observation #problem-observation{flex:1;min-height:0;width:100%;height:auto}body.problem-observation .observation-diagram{min-height:0;overflow:hidden}body.problem-observation #problem-observation>p{flex:none;font-size:clamp(15px,1.6vw,22px);margin:6px 0}

/* Give geometry a real viewport; conversation lives outside the board. */
body.learning .classroom{margin-left:22%;width:75%}
body.learning .leo-zone{width:25vw;pointer-events:none}
body.learning #board-page-stage{grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);grid-template-rows:minmax(0,1fr);gap:14px}
body.learning #board-page-stage:has(#jxgbox.hidden){grid-template-columns:minmax(0,1fr)}
body.learning #board-panel[data-page-index="-1"] #board-page-stage{grid-template-columns:minmax(0,1fr)}
body.learning footer{margin-left:23%;width:74%}
body.learning #voice-control{max-width:none;align-items:center;gap:12px;justify-content:center}
#conversation-toggle{display:block;border-radius:28px;padding:12px 18px;background:#fffaf0e8}
body.learning #conversation-toggle{display:block}
#conversation{position:fixed;z-index:45;right:22px;bottom:120px;width:min(420px,calc(100vw - 24px));max-height:min(380px,calc(100dvh - 110px));border:1px solid #ffffffa0;border-radius:22px;background:#fffdf4ed;backdrop-filter:blur(22px);box-shadow:0 15px 55px #213e3229;display:flex;flex-direction:column;color:#203c32;overflow:hidden}
#conversation header{padding:8px 12px;gap:8px;flex:none;background:#f1f4e7b0}
#conversation-handle{touch-action:none;cursor:grab;flex:1;text-align:left;border:0;background:transparent;padding:8px;font-size:14px}
#conversation-handle:active{cursor:grabbing}#conversation-close{border:0;background:transparent;padding:4px 10px;font-size:24px}
#conversation .teacher-line{padding:14px;min-height:0;font-size:15px;line-height:1.7}
#conversation-log{overflow:auto;padding:0 14px 14px;min-height:0;font-size:14px;line-height:1.7}
#conversation-log .message{padding:10px 0;border-top:1px solid #d9dfd0}#conversation-log p{margin:4px 0}#conversation-log small{color:#71836d}
@media(max-width:850px){body.learning .classroom{margin-left:12px;width:calc(100% - 24px)}body.learning .leo-zone{display:none}body.learning footer{margin:0 12px;width:calc(100% - 24px)}body.learning #board-page-stage{grid-template-columns:minmax(0,1fr);grid-template-rows:minmax(0,2fr) minmax(80px,1fr);gap:6px}body.learning #board-page-stage:has(#jxgbox.hidden){grid-template-rows:minmax(0,1fr)}#conversation{right:12px;bottom:105px}#conversation-toggle{padding:10px 12px;font-size:13px}body.learning #voice-control #record{width:auto;flex:1;max-width:410px}}
/* The shared renderer uses these classes for its real SVG stroke animations. */
#jxgbox .bl-draw{transition:stroke-dashoffset var(--bl-ms,800ms) linear}
#jxgbox .bl-pop{transform-box:fill-box;transform-origin:center;transition:transform .14s cubic-bezier(.2,1.6,.4,1)}
#jxgbox .bl-pen{pointer-events:none;opacity:0;transition:opacity .15s}
@media(prefers-reduced-motion:reduce){#jxgbox .bl-draw,#jxgbox .bl-pop{transition:none!important}}

/* New Global lessons: a problem-grounded figure stays beside the generated Tutor board. */
.lesson-choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin-top:12px;max-height:180px;overflow:auto}
.lesson-choices button{min-width:0;text-align:left;border:1px solid #c6cbbd;background:#f5f2e9;color:#295343;border-radius:12px;padding:8px 12px;cursor:pointer;font:inherit;font-size:12px}
.lesson-choices button:hover,.lesson-choices button:focus-visible{background:#e8eddf;border-color:#63866c}
#lesson-visual[hidden]{display:none!important}
#lesson-visual{height:150px;flex:none;overflow:hidden;border:1px solid #d7ded1;border-radius:12px;background:#fafbf7;padding:5px 10px}
#lesson-visual svg,.lesson-figure svg{display:block;width:100%;height:100%;max-height:180px;color:#375c4c;font:15px system-ui,sans-serif}
#lesson-visual svg text,.lesson-figure svg text{fill:#375c4c;font:14px system-ui,sans-serif}
#lesson-visual svg .atoms circle,.lesson-figure svg .atoms circle{fill:#dbe9d7;stroke:#557f66;stroke-width:2}
#lesson-visual svg .atoms rect,.lesson-figure svg .atoms rect{fill:#e9ded2;stroke:#a88263;stroke-width:2}
#lesson-visual svg .atoms text,.lesson-figure svg .atoms text{text-anchor:middle;font-weight:700}
#lesson-visual svg .cell rect,.lesson-figure svg .cell rect{fill:none;stroke:#64836d;stroke-width:5}
#lesson-visual svg .cell rect+rect,.lesson-figure svg .cell rect+rect{stroke:#bd8d63;stroke-width:2}
#lesson-visual svg .cell ellipse,.lesson-figure svg .cell ellipse{fill:#e7efe4;stroke:#7eaa9d;stroke-width:2}
#lesson-visual svg .fraction-strips rect,.lesson-figure svg .fraction-strips rect{fill:#fff;stroke:#567562;stroke-width:2}
#lesson-visual svg .fraction-strips .fill,.lesson-figure svg .fraction-strips .fill{fill:#b8d1aa;stroke:none}
#lesson-visual svg .fraction-strips path,.lesson-figure svg .fraction-strips path{stroke:#567562;stroke-width:2}
#lesson-visual svg .mural,.lesson-figure svg .mural{fill:#eff0dd;stroke:#4b7558;stroke-width:3}
.market-visual{height:100%;display:flex;align-items:center;gap:8px}
.market-visual svg{flex:1;min-width:0;max-height:100%!important}
.market-visual label{display:flex;flex-direction:column;gap:4px;min-width:130px;font-size:12px;color:#315c47}
.market-visual output{font-weight:700}
.market-visual p{display:none}
.market-visual .axis{fill:none;stroke:#4b6254;stroke-width:2}
.market-visual .grid{fill:none;stroke:#e2e8df;stroke-width:1}
.market-visual .demand{fill:none;stroke:#547b9f;stroke-width:3}
.market-visual .supply{fill:none;stroke:#bf8560;stroke-width:3}
.market-visual .tax-supply{fill:none;stroke:#b45c62;stroke-width:3;stroke-dasharray:6 4}
.market-visual .tax-wedge{fill:none;stroke:#9c4b54;stroke-width:4}
.market-visual .market-dot{fill:#1e6550}
.lesson-figure{height:100%;display:flex;align-items:center;justify-content:center}
.lesson-figure .market-visual{width:100%}
body.problem-observation #lesson-visual{display:none!important}
@media(max-width:650px){.lesson-choices{grid-template-columns:1fr;max-height:145px}.market-visual label{min-width:98px}#lesson-visual{height:130px}}
body.learning #board-facts{display:flex;flex-wrap:wrap;align-items:center;gap:4px}
body.learning #board-facts .bw-solid-camera{margin:0;padding:4px 0;gap:5px}
body.learning #board-facts .bw-solid-camera>span{display:none}
body.learning #board-facts .drag-toggle{margin:0!important}

/* Movable conversation transcript */
#conversation{width:min(350px,calc(100vw - 24px));height:min(440px,calc(100dvh - 130px));max-height:none;min-width:240px;min-height:180px;resize:none}
#conversation-log{flex:1;padding:12px 14px 24px;display:flex;flex-direction:column;gap:10px}
#conversation-log .message,#messages .message{border:0;max-width:88%;width:max-content;padding:9px 12px;border-radius:14px;background:#edf1e9}
#conversation-log .message.student,#messages .message.student{align-self:flex-end;background:#e5eddb;margin-left:auto}
#conversation-log .message.teacher,#messages .message.teacher{align-self:flex-start;background:#fffaf0;margin-right:auto}
#conversation-log .message small,#messages .message small{display:block;font-weight:700;color:#4c694d}
#conversation-log .message p,#messages .message p{margin:3px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}
.conversation-resize{position:absolute;right:0;bottom:0;width:28px;height:28px;cursor:nwse-resize;touch-action:none;background:linear-gradient(135deg,transparent 53%,#809577 54%,#809577 59%,transparent 60%,transparent 70%,#809577 71%,#809577 76%,transparent 77%);border-radius:0 0 20px 0}
#messages{display:flex;flex-direction:column;gap:10px}

/* Default transcript placement approved in the classroom screenshot. */
#conversation{top:12px;right:clamp(12px,1.5vw,28px);bottom:auto;height:min(46dvh,560px)}
#conversation[hidden]{display:none}
@media(max-width:650px){#conversation{top:12px;right:12px;bottom:auto;height:min(45dvh,420px)}}

/* Streaming speech can grow while the learner is still talking. Keep the
   compact microphone preview inside its button; the transcript holds it all. */
#voice-control,#voice-control #record{min-width:0}
#voice-control #record{grid-template-columns:30px minmax(0,1fr);max-width:100%;overflow:hidden}
#voice-label,#voice-hint{min-width:0;white-space:normal;overflow-wrap:anywhere;word-break:break-word}
#voice-label{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;line-clamp:2;overflow:hidden;line-height:1.35;font-size:clamp(14px,1.25vw,17px)}
#voice-hint{display:block;overflow:hidden;text-overflow:ellipsis;line-height:1.35}
#conversation-log,#conversation-log .message,#messages .message{min-width:0}
#conversation-log .message p,#messages .message p{overflow-wrap:anywhere;word-break:break-word;hyphens:auto}
#status{max-width:min(100%,560px);overflow-wrap:anywhere;white-space:normal}
@media(max-width:650px){#voice-control{min-width:0;flex:1}#voice-control #record{padding-inline:14px;column-gap:9px}#voice-label{font-size:14px}#voice-hint{font-size:10px}#conversation-log{font-size:13px;line-height:1.55}}

/* Phone browsers, including WeChat's changing viewport and safe areas. */
@media(max-width:650px){
 body:not(.learning),body.learning{height:auto;min-height:100svh;min-height:100dvh;overflow-x:hidden;overflow-y:auto;padding:0;display:block}
 body:not(.learning) .stage,body.learning .stage{display:block;min-height:0!important;padding:0 0 12px!important}
 body:not(.learning) .welcome{height:auto;min-height:0;overflow:visible;align-items:flex-start;padding:22px 16px}
 body:not(.learning) .welcome-copy{min-width:0}
 body:not(.learning) footer,body.learning footer{position:sticky;bottom:0;left:auto;right:auto;z-index:20;width:100%;margin:0;padding:8px 12px max(10px,env(safe-area-inset-bottom));background:#f7f2e8f2;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid #d2c9b5}
 #voice-control{width:100%;display:flex;align-items:center;gap:8px}
 #voice-control #record,body.learning #voice-control #record{width:auto;max-width:none;flex:1 1 0;min-width:0;min-height:58px;padding:9px 12px;grid-template-columns:24px minmax(0,1fr);column-gap:8px}
 #voice-control #record svg{width:22px;height:22px}
 #conversation-toggle{flex:0 0 auto;min-height:48px;padding:8px 12px;white-space:nowrap}
 .below-input{justify-content:center;gap:4px 8px;padding-top:4px}.below-input #status{flex:1 1 100%;text-align:center;line-height:1.35}
 body.learning .classroom{height:auto;min-height:0;overflow:visible;margin:0 8px;width:calc(100% - 16px);padding:12px 10px;gap:8px}
 body.learning #board-panel.board-paged{height:clamp(430px,68dvh,620px)!important;flex:none!important;min-height:0!important;overflow:hidden}
 body.learning.problem-observation #board-panel{height:clamp(280px,48dvh,440px)!important;flex:none!important;min-height:280px!important}
body.learning.problem-observation #problem-observation{min-height:280px}
.observation-figure{display:flex;align-items:center;justify-content:center;padding:8px 18px;background:#fffaf0;border:1px solid #d7d3c5;border-radius:14px}
.observation-figure svg{display:block;width:100%;height:100%;max-height:310px}
.figure-title{font:600 20px system-ui,sans-serif;letter-spacing:.12em;fill:#526b59}
.figure-label{font:500 23px system-ui,sans-serif;fill:#385847}
.bar-outline{fill:#f5ead5;stroke:#8a624b;stroke-width:5}
.bar-eaten{fill:#bd7952;stroke:#8a624b;stroke-width:2}
.bar-left{fill:#dfb68a;stroke:#8a624b;stroke-width:2}
.bar-dividers{stroke:#8a624b;stroke-width:4}
.lever-beam{stroke:#735740;stroke-width:17;stroke-linecap:round}
.lever-pivot{fill:#92a58d;stroke:#526b59;stroke-width:4}
.lever-force,.lever-push{stroke:#b46d49;stroke-width:7;fill:none;stroke-linecap:round;stroke-linejoin:round}
.lever-push{stroke:#4b8873}
 body.learning #board-page-stage{grid-template-columns:minmax(0,1fr);grid-template-rows:minmax(180px,1.4fr) minmax(110px,1fr);gap:8px}
 body.learning #board-page-stage:has(#jxgbox.hidden){grid-template-rows:minmax(0,1fr)}
 body.learning .teacher-line{min-height:0;align-items:flex-start;overflow:visible}
 body.learning #board-notes{overflow:auto!important}
 #conversation:not([hidden]){max-width:calc(100vw - 16px);max-height:calc(100dvh - 160px);top:64px;right:8px;left:auto;width:min(280px,calc(100vw - 16px));height:min(30dvh,250px)}
 #account-gate{max-width:calc(100vw - 24px);max-height:calc(100dvh - 36px);overflow:auto;padding:22px}
}
/* Mia Sees the World: the live lesson keeps a visible evidence anchor. */
.parthenon-live{min-height:260px;display:grid;align-content:center;justify-items:center;gap:12px;padding:18px;background:#f6f3e9;border:1px solid #dfd7c3;border-radius:16px;color:#465445}
.parthenon-art{position:relative;width:min(100%,440px);height:215px;border-bottom:12px solid #a68f6e}
.parthenon-art .roof{position:absolute;top:10px;left:6%;width:88%;height:53px;background:#d8c7a8;clip-path:polygon(50% 0,100% 100%,0 100%);border-bottom:5px solid #aa9270}
.parthenon-art .frieze{position:absolute;top:64px;left:8%;width:84%;height:25px;background:repeating-linear-gradient(90deg,#b09a78 0 10px,#d4c1a2 10px 20px);border:4px solid #9d8769}
.parthenon-art .columns{position:absolute;top:92px;left:10%;width:80%;height:107px;display:flex;justify-content:space-between}
.parthenon-art .columns i{display:block;width:8%;height:100%;background:linear-gradient(90deg,#af9b7b,#eee2c9 45%,#a8916e);border-radius:4px 4px 0 0}
.parthenon-art .base{position:absolute;bottom:-12px;left:4%;width:92%;height:12px;background:#9e896d}
.parthenon-points{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.parthenon-points button{border:1px solid #b8c4ae;border-radius:999px;background:#fff;padding:8px 16px;color:#345541;cursor:pointer}
.parthenon-points button.on{background:#345541;color:#fff}
.parthenon-live p{margin:0;text-align:center;font-size:14px}.parthenon-live a{color:#466f58;font-size:12px}
.guardian-consent{max-width:460px;border:0;border-radius:18px;padding:30px;background:#fafbf7;color:#2c4738;box-shadow:0 18px 70px #19332655}
.guardian-consent::backdrop{background:#102419a8}.guardian-consent form{display:grid;gap:16px}.guardian-consent h2,.guardian-consent p{margin:0}.guardian-consent label{display:grid;gap:6px}.guardian-consent label:has(input){display:flex;align-items:start}.guardian-consent select{padding:10px}.guardian-consent form>div{display:flex;gap:10px;justify-content:flex-end}
.learning #learner-text-form,body:not(.learning) #learner-text-form{display:flex;align-items:end;gap:8px;width:100%;max-width:840px;margin:0 auto 8px}
#learner-text-form label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
#learner-text-form textarea{flex:1;min-width:0;max-height:90px;resize:vertical;border:1px solid #b8cdbb;border-radius:12px;background:#fffef9;padding:10px 12px;font:15px/1.35 system-ui;color:#244333}
#learner-text-form button{border:0;border-radius:10px;background:#315e43;color:#fff;padding:11px 16px;font:600 14px system-ui;white-space:nowrap;cursor:pointer}
.history-lesson{display:block;width:100%;white-space:normal;text-align:left;margin:9px 0;padding:12px 15px;background:#fffdf5;border:1px solid #d9dfd1;border-radius:12px}
#lesson-history{margin-top:22px;max-height:36vh;overflow:auto}
#own-question{background:#274b3c;color:#fff;border-color:#274b3c;font-weight:600}
#own-question:hover{background:#35634f}

/* Global lesson entry: one recommended question, with the rest behind a clear picker. */
body:not(.learning) .arrival-steps,body:not(.learning) .pilot,body:not(.learning) footer{display:none!important}
body:not(.learning) .welcome{overflow:visible;align-items:center}
body:not(.learning) .welcome-copy>.eyebrow{font-size:13px;letter-spacing:.13em;margin-bottom:14px}
body:not(.learning) .recommendation{border:0;margin:12px 0 20px;padding:0;gap:24px}
body:not(.learning) .recommendation h2{font-size:clamp(30px,2.8vw,46px);line-height:1.18}
body:not(.learning) .recommendation-copy>p:not(.eyebrow){font-size:17px;line-height:1.5}
body:not(.learning) .lesson-meta{font-size:13px}
body:not(.learning) .welcome .explore{font-size:17px;padding:16px 24px;margin:0}
.welcome-actions{display:flex;align-items:center;gap:12px;margin-top:18px}
.welcome-actions button{font-size:15px;padding:10px 4px;background:transparent;border:0;box-shadow:none;color:#28513e}
.welcome-actions button:hover{text-decoration:underline;background:transparent}
#lesson-picker{width:min(680px,92vw);max-height:min(80dvh,720px);padding:28px;border:1px solid #ccd4c5;border-radius:24px;box-shadow:0 25px 80px #20392b45}
#lesson-picker::backdrop{background:#1c352b99;backdrop-filter:blur(4px)}
.picker-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}
.picker-head h2{font:400 32px/1.2 Wenkai,Georgia,serif;margin:0}
#lesson-picker .lesson-choices{max-height:none;margin-top:25px;gap:11px}
#lesson-picker .lesson-choices button{font-size:16px;min-height:61px;padding:15px 18px;background:#f5f6ef}
#lesson-picker .lesson-choices button:focus-visible{outline:3px solid #66866c}
body:not(.learning) #own-question{display:none}
body.learning #end{font-size:14px;padding:8px 15px;background:#fffdf3;border:1px solid #aebeb0}
body.learning .below-input{justify-content:space-between;gap:10px;margin:8px auto 0}
body.learning .below-input #status{font-size:13px;flex:1 1 100%;background:transparent;text-align:left}
body.learning #timer{font-size:13px}
#lesson-notice{background:#f0f5eb;border:1px solid #c4d5c4;border-radius:18px;padding:24px 28px;margin:12px 0 22px}
#lesson-notice h2{font:400 28px/1.2 Wenkai,Georgia,serif;margin:0 0 8px}
#lesson-notice p{font-size:16px;margin:0 0 18px}
#lesson-notice button{font-size:15px}
body.lesson-finished #learner-text-form,body.lesson-finished #voice-control,body.lesson-finished #end{display:none!important}
body.lesson-finished .below-input{justify-content:center}
body.lesson-finished .below-input #status{display:none}
@media(max-width:700px){body:not(.learning) .welcome{padding:22px 20px}body:not(.learning) .recommendation{grid-template-columns:1fr;gap:6px}body:not(.learning) #recommendation-board{height:160px}.welcome-actions{flex-wrap:wrap;gap:4px 20px}#lesson-picker .lesson-choices{grid-template-columns:1fr;max-height:55dvh;overflow:auto}body.learning .below-input #status{font-size:12px}}