:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#282736;background:#f7f7fb;font-synthesis:none;--purple:#6250df;--line:#e8e7ef;--muted:#777487}
*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,a:focus-visible{outline:3px solid #b7aaff;outline-offset:3px}button{border:1px solid var(--line);border-radius:10px;background:white;color:inherit;padding:11px 16px;font-weight:600;transition:background .15s,transform .15s}button:hover:not(:disabled){background:#f1effb}button.primary{background:var(--purple);color:white;border-color:var(--purple)}button.primary:hover:not(:disabled){background:#5141c7}button.danger{color:#b43b51}button.quiet{border-color:transparent;background:transparent}input,textarea,select{border:1px solid #dcd9e8;border-radius:9px;padding:11px 13px;background:white;color:inherit;outline:none}input:focus,textarea:focus,select:focus{border-color:var(--purple);box-shadow:0 0 0 3px #6250df15}textarea{resize:vertical}label{font-size:13px;font-weight:600;display:grid;gap:8px}h1,h2,h3,p{margin-top:0}h1{font-size:32px;letter-spacing:-1.1px}h2{font-size:20px;letter-spacing:-.4px}a{color:var(--purple)}.muted{color:var(--muted);font-size:13px;line-height:1.6}.eyebrow{font-size:11px;font-weight:750;letter-spacing:1.5px;color:var(--muted);text-transform:uppercase}.brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:750;letter-spacing:-.4px}.brand-icon{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:12px;background:var(--purple);color:#fff;font-size:25px}.loading{min-height:100dvh;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:16px;color:var(--muted)}.center-page{min-height:100dvh;display:grid;place-items:center;padding:25px;background:radial-gradient(ellipse at 30% 10%,#eae6ff,transparent 60%),#f7f7fb}.login-card{background:white;padding:38px;border:1px solid var(--line);border-radius:22px;width:min(440px,100%);box-shadow:0 20px 80px #35305b08}.login-card h1{font-size:27px;margin:30px 0 12px}.login-card form{display:grid;gap:20px;margin-top:25px}.error{color:#b43b51;font-size:13px;line-height:1.5}.admin-header{height:80px;border-bottom:1px solid var(--line);background:#fff;display:flex;justify-content:space-between;align-items:center;padding:0 max(28px,calc((100vw - 1160px)/2))}.admin-main{max-width:1216px;margin:44px auto;padding:0 28px}.intro{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:30px}.intro p{margin-bottom:0}.pill{background:#efecff;color:#6854cb;border:1px solid #e1dcff;border-radius:30px;padding:8px 13px;font-size:12px;white-space:nowrap}.admin-grid{display:grid;grid-template-columns:320px 1fr;gap:24px;align-items:start}.card{border:1px solid var(--line);border-radius:17px;background:white;padding:25px}.create-form{display:grid;gap:21px}.split-input{display:grid;grid-template-columns:1fr 1fr;gap:12px}.split-input input{width:100%}.card-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:20px}.card-head h2{margin:0}.lesson-row{border-top:1px solid var(--line);padding:21px 0;display:grid;grid-template-columns:1fr auto;gap:12px}.lesson-row:last-child{padding-bottom:0}.lesson-name{font-size:16px;font-weight:650;margin-bottom:7px;overflow-wrap:anywhere}.lesson-actions{display:flex;gap:7px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.lesson-actions button{font-size:12px;padding:8px 11px}.badge{display:inline-block;border-radius:20px;padding:4px 9px;background:#eaf6ef;color:#287348;font-size:11px;font-weight:600;margin-left:7px;vertical-align:middle}.badge.ended{background:#f0eff4;color:#87818f}.invite{background:#f1efff;border:1px solid #d9d2ff;padding:20px;border-radius:14px;margin-bottom:24px}.invite h3{font-size:15px;margin-bottom:9px}.invite p{font-size:13px;color:#69617c;margin-bottom:14px}.invite-line{display:flex;gap:8px}.invite-line input{flex:1;min-width:0;font-size:12px}.empty-list{padding:35px 10px;text-align:center;color:var(--muted);line-height:1.7}.workspace{height:100dvh;display:grid;grid-template-columns:230px minmax(320px,1fr) minmax(360px,1.1fr);grid-template-rows:72px 1fr;overflow:hidden;background:white}.workspace-header{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 24px;gap:15px}.lesson-status{display:flex;align-items:center;gap:14px;font-size:12px;color:var(--muted)}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#3da875;margin-right:6px}.sidebar{background:#f8f8fc;border-right:1px solid var(--line);padding:24px 15px;display:flex;flex-direction:column;min-height:0}.new-chat{width:100%;text-align:left;background:#efecff;border-color:#e2dcff;color:#6451d0}.sidebar .eyebrow{padding:30px 10px 8px}.chat-list{overflow-y:auto;flex:1}.chat-item{border:0;background:transparent;width:100%;text-align:left;padding:12px;font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:3px 0}.chat-item.active{background:#eae6fb;color:#5a46c6;font-weight:650}.sidebar-footer{font-size:11px;color:#9691a5;line-height:1.7;padding:14px 9px 0;border-top:1px solid var(--line)}.chat-pane{display:flex;flex-direction:column;min-width:0;min-height:0;border-right:1px solid var(--line)}.pane-title{height:61px;padding:20px 24px;border-bottom:1px solid var(--line);font-size:13px;font-weight:650;flex-shrink:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pane-title span{font-size:11px;color:var(--muted);margin-left:10px;font-weight:400}.messages{overflow-y:auto;flex:1;padding:26px 24px;scroll-behavior:smooth}.welcome{max-width:400px;margin:9vh auto 0}.welcome .spark{font-size:38px;margin-bottom:19px}.welcome h1{font-size:29px;line-height:1.2}.welcome p{color:var(--muted);font-size:14px;line-height:1.7}.suggestions{display:grid;gap:9px;margin-top:28px}.suggestion{text-align:left;font-size:13px;font-weight:500;padding:13px 15px;border-radius:12px}.suggestion span{margin-right:9px}.message{margin-bottom:25px;line-height:1.65;font-size:14px;overflow-wrap:anywhere}.message-label{font-size:11px;font-weight:700;color:var(--muted);margin-bottom:7px;display:flex;align-items:center;gap:6px}.message.user .message-body{background:#f1effb;padding:13px 16px;border-radius:14px 14px 3px 14px}.message-body{white-space:pre-wrap}.message.notice{color:#b43b51;font-size:12px}.code-block{margin:12px 0;border:1px solid var(--line);border-radius:10px;background:#faf9fd;white-space:normal}.code-block summary{cursor:pointer;font-size:12px;padding:12px;color:var(--purple);font-weight:600}.code-block pre{max-height:300px;overflow:auto;padding:14px;font-size:11px;white-space:pre;margin:0;border-top:1px solid var(--line)}.composer{padding:16px 21px;border-top:1px solid var(--line);background:white}.composer-box{border:1px solid #dcd9e8;border-radius:14px;padding:10px;box-shadow:0 3px 10px #27213d04}.composer textarea{border:0;box-shadow:none;width:100%;min-height:66px;max-height:160px;resize:none;font-size:14px;padding:6px;background:transparent}.composer-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px}.composer-hint{font-size:10px;color:#9a95a6;padding-left:6px}.send-button{padding:9px 14px;font-size:12px}.composer-note{text-align:center;font-size:10px;color:#9b96a7;margin:10px 0 0}.typing{color:var(--purple);font-size:13px;line-height:1.6;padding:10px 0;animation:pulse 1.6s infinite}.game-pane{display:flex;flex-direction:column;min-width:0;min-height:0;background:#f6f6fa}.game-toolbar{height:61px;background:white;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 18px;gap:8px;flex-shrink:0}.game-toolbar strong{font-size:13px;white-space:nowrap}.game-tools{display:flex;gap:7px;align-items:center}.game-tools select{font-size:11px;max-width:110px;padding:7px}.game-tools button{font-size:11px;padding:8px 10px}.game-area{flex:1;margin:20px;border:1px solid #e0deeb;border-radius:14px;overflow:hidden;background:white;display:flex;position:relative;min-height:0}.game-empty{margin:auto;text-align:center;max-width:290px;padding:30px}.game-empty .illustration{margin:0 auto 25px;width:100px;height:100px;border-radius:28px;background:#f0edff;display:grid;place-items:center;font-size:45px;transform:rotate(-7deg)}.game-empty h2{font-size:19px}.game-empty p{font-size:13px;color:var(--muted);line-height:1.7}.game-area iframe{width:100%;height:100%;border:0;background:white}.game-foot{font-size:11px;text-align:center;color:#93909f;padding:0 20px 18px}.mobile-tabs{display:none}.ended-banner{background:#fff4e7;border-bottom:1px solid #f1dcc1;color:#8f622d;padding:13px 20px;font-size:13px}.readonly-note{margin:15px 24px;color:#a16824;font-size:12px}.status-page .brand{margin-bottom:35px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:13px 20px;background:#302b45;color:white;border-radius:12px;font-size:13px;max-width:90vw;box-shadow:0 10px 30px #0002;z-index:100}dialog{border:1px solid var(--line);border-radius:18px;padding:28px;max-width:440px;width:90vw;color:inherit}dialog::backdrop{background:#211c3d66}dialog p{line-height:1.6;color:var(--muted);font-size:14px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px}.link-button{text-decoration:none;display:inline-block;padding:12px 16px;border-radius:10px;background:#efecff;font-size:13px;font-weight:600}.error[hidden], [hidden]{display:none!important}@keyframes pulse{50%{opacity:.5}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}
@media(min-width:1500px){.workspace{grid-template-columns:250px minmax(400px,.85fr) minmax(480px,1.15fr)}.messages{padding:30px 36px}.composer{padding:20px 30px}}
@media(max-width:1100px){.workspace{grid-template-columns:180px minmax(290px,1fr) minmax(300px,1fr)}.workspace-header{padding:0 18px}.game-toolbar{padding:0 10px}.game-toolbar strong{display:none}.game-tools{width:100%;justify-content:space-between}.game-area{margin:12px}.lesson-status .lesson-name-header{display:none}.admin-grid{grid-template-columns:285px 1fr}.lesson-row{grid-template-columns:1fr}.lesson-actions{justify-content:flex-start}}
@media(max-width:800px){.workspace{grid-template-columns:155px 1fr;grid-template-rows:65px 43px 1fr}.workspace-header{grid-row:1;grid-column:1/-1}.mobile-tabs{display:flex;grid-row:2;grid-column:1/-1;background:white;border-bottom:1px solid var(--line);padding:3px 15px;gap:10px}.mobile-tabs button{border:0;font-size:12px;padding:6px 18px}.mobile-tabs button.active{background:#efecff;color:var(--purple)}.sidebar{grid-column:1;grid-row:3;padding:16px 8px}.chat-pane{grid-column:2;grid-row:3}.game-pane{grid-column:1/-1;grid-row:3;display:none}.workspace.show-game .sidebar,.workspace.show-game .chat-pane{display:none}.workspace.show-game .game-pane{display:flex}.messages{padding:20px 17px}.composer{padding:12px}.lesson-status{font-size:11px;gap:6px}.brand{font-size:14px}.brand-icon{width:30px;height:30px;font-size:21px}.admin-grid{grid-template-columns:1fr}.admin-main{margin:28px auto}.intro{align-items:flex-start;flex-direction:column}.admin-header{padding:0 24px;height:70px}.welcome{margin-top:25px}.welcome h1{font-size:25px}.game-toolbar strong{display:block}.game-tools{width:auto}.login-card{padding:28px}}
@media(max-width:480px){.workspace{grid-template-columns:110px 1fr}.sidebar{padding:13px 5px}.new-chat{font-size:11px;padding:10px 7px}.chat-item{font-size:11px;padding:10px 7px}.sidebar .eyebrow{font-size:9px;padding-left:6px}.sidebar-footer{font-size:9px;padding:10px 5px}.workspace-header{padding:0 12px}.workspace-header .brand{font-size:12px;gap:7px}.lesson-status{font-size:10px}.composer-hint{display:none}.composer-bottom{justify-content:flex-end}.messages{padding:17px 12px}.pane-title{padding:20px 12px}.pane-title span{display:none}.suggestion{font-size:12px;padding:10px}.welcome h1{font-size:23px}.message{font-size:13px}.card{padding:21px}.admin-main{padding:0 18px}.invite-line{flex-wrap:wrap}.invite-line input{flex-basis:100%}.game-area{margin:10px}}

/* Markdown answers: prose wraps normally; code keeps its original whitespace. */
.markdown-body{white-space:normal;line-height:1.7;overflow-wrap:anywhere}
.markdown-body>:first-child{margin-top:0}.markdown-body>:last-child{margin-bottom:0}
.markdown-body p{margin:0 0 12px}.markdown-body h1{font-size:24px}.markdown-body h2{font-size:21px}.markdown-body h3{font-size:18px}.markdown-body h4,.markdown-body h5,.markdown-body h6{font-size:15px}
.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6{margin:22px 0 10px;line-height:1.35;letter-spacing:normal}
.markdown-body ul,.markdown-body ol{padding-left:24px;margin:10px 0 14px}.markdown-body li{margin:4px 0}.markdown-body li>p{margin:4px 0}.markdown-body li>ul,.markdown-body li>ol{margin:4px 0}
.markdown-body blockquote{margin:14px 0;padding:8px 14px;border-left:3px solid #b8adef;background:#f7f5ff;color:#69617c}.markdown-body blockquote p:last-child{margin-bottom:0}
.markdown-body code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.88em;background:#f0edf8;padding:2px 5px;border-radius:4px}
.markdown-body pre{overflow:auto;max-height:320px;padding:14px;background:#faf9fd;border:1px solid var(--line);border-radius:10px;white-space:pre}
.markdown-body pre code{background:none;padding:0;border-radius:0;font-size:12px;white-space:pre}.markdown-body .code-block pre{border:0;border-top:1px solid var(--line);border-radius:0}
.markdown-body table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:14px 0;font-size:13px}.markdown-body th,.markdown-body td{border:1px solid var(--line);padding:8px 12px;text-align:left}.markdown-body th{background:#f7f5ff}
.markdown-body hr{border:0;border-top:1px solid var(--line);margin:20px 0}.markdown-body a{text-decoration:underline;text-underline-offset:3px}

.game-toolbar{height:auto;min-height:61px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}.game-tools{flex-wrap:wrap}#open-project{white-space:nowrap}

#sync-status{margin-top:10px;color:#6b5bb6;overflow-wrap:anywhere}