.player{--gutter:clamp(12px, 2vw, 28px);--radius-stage:22px;--header-h:64px;--chat-w:clamp(300px, 30vw, 420px);background:var(--t-room);height:100dvh;color:var(--t-text);font-family:var(--f-ui);padding:0 max(var(--gutter), env(safe-area-inset-right)) 0 max(var(--gutter), env(safe-area-inset-left));transition:background-color .4s var(--ease-out), color .4s var(--ease-out);flex-direction:column;display:flex;overflow:hidden}.player:fullscreen{--header-h:56px}:where(.player,.player-sheet) button{cursor:pointer;background:0 0;border:0}.player button:disabled,.player-sheet button:disabled{cursor:not-allowed;opacity:.34}.player :focus-visible,.player-sheet :focus-visible{outline:2px solid var(--t-accent);outline-offset:3px}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}kbd{font:600 11px/1 var(--f-ui);text-align:center;background:var(--t-surface-2);border:1px solid var(--t-line);min-width:22px;color:var(--t-text-2);border-bottom-width:2px;border-radius:6px;padding:4px 6px;display:inline-block}.player-header{height:var(--header-h);flex-shrink:0;align-items:center;gap:14px;width:100%;max-width:1760px;margin:0 auto;display:flex}.icon-button{min-width:44px;min-height:44px;color:var(--t-text-2);transition:background-color .2s, color .2s, transform .2s var(--ease-spring);border-radius:12px;flex-shrink:0;place-items:center;display:inline-grid}.icon-button:hover:not(:disabled){background:var(--t-surface-2);color:var(--t-text)}.icon-button:active:not(:disabled){transform:scale(.92)}.session-sidebar-toggle{margin-left:-8px}.header-new-session{margin-left:-12px}.header-new-session:disabled{opacity:.35;cursor:default}.brand{letter-spacing:-.03em;flex-shrink:0;align-items:center;gap:9px;font-size:18px;font-weight:700;display:flex}.brand-mark{background:var(--t-accent);width:22px;height:22px;box-shadow:0 0 0 4px var(--t-accent-soft);border-radius:7px;position:relative}.brand-mark:after{content:"";background:var(--t-room);border-radius:50%;width:6px;height:6px;position:absolute;inset:6px 6px auto auto}.header-divider{background:var(--t-line);flex-shrink:0;width:1px;height:22px}.lesson-heading{flex:1;min-width:0}.lesson-heading strong{white-space:nowrap;text-overflow:ellipsis;animation:fade-in .5s var(--ease-out);font-size:15px;font-weight:500;display:block;overflow:hidden}.header-end{flex-shrink:0;align-items:center;gap:6px;display:flex}.lesson-status{background:var(--t-surface);border:1px solid var(--t-line);color:var(--t-text-2);white-space:nowrap;border-radius:999px;align-items:center;gap:8px;padding:7px 12px 7px 10px;font-size:13px;font-weight:500;display:inline-flex;position:relative}.lesson-status i{background:var(--t-text-3);border-radius:50%;flex-shrink:0;width:7px;height:7px}.lesson-status.is-live{color:var(--t-text)}.lesson-status.is-live i{background:var(--t-live);animation:pulse-live 2s var(--ease-out) infinite}.lesson-status.is-listening{color:var(--t-text)}.lesson-status.is-listening i{background:var(--t-accent);animation:pulse 1.4s var(--ease-out) infinite}.lesson-status.is-error,.lesson-status.is-error i{color:var(--t-warn);background-color:#0000}.lesson-status.is-error i{background:var(--t-warn)}.workspace{width:100%;max-width:1760px;min-height:0;padding-bottom:max(14px, env(safe-area-inset-bottom));grid-template-columns:minmax(0, 1fr) var(--chat-w);flex:1;grid-template-rows:minmax(0,1fr) auto;grid-template-areas:"canvas chat""canvas dock";gap:0 18px;margin:0 auto;display:grid}.canvas-shell{isolation:isolate;grid-area:canvas;min-height:0;display:flex;position:relative}.canvas-shell:before{content:"";z-index:-1;pointer-events:none;background:radial-gradient(closest-side, var(--t-glow), transparent);filter:blur(70px);opacity:.14;transition:opacity 1.2s var(--ease-out), transform 1.2s var(--ease-out);border-radius:40%;position:absolute;inset:-4% -3% -6%;transform:scale(.94)}.player[data-lesson-state=playing] .canvas-shell:before{opacity:.55;animation:7s ease-in-out infinite breathe;transform:scale(1)}.player[data-lesson-state=planning] .canvas-shell:before,.player[data-lesson-state=buffering] .canvas-shell:before,.player.is-listening .canvas-shell:before{opacity:.3}.canvas{background-color:var(--t-stage);min-width:0;min-height:0;color:var(--t-stage-ink);background-image:radial-gradient(circle, color-mix(in srgb, var(--t-stage-ink) 9%, transparent) 1px, transparent 1.5px);border:1px solid var(--t-stage-line);border-radius:var(--radius-stage);box-shadow:var(--t-shadow);transition:background-color .4s var(--ease-out), border-color .4s;background-position:50%;background-size:26px 26px;flex:1;position:relative;overflow:hidden}.canvas:before{content:"";pointer-events:none;background:radial-gradient(ellipse 72% 66% at 50% 50%, var(--t-stage) 30%, transparent 100%);position:absolute;inset:0}.board-track{scroll-snap-type:x mandatory;overscroll-behavior-x:contain;scrollbar-width:none;display:flex;position:absolute;inset:0;overflow:auto hidden}.board-track::-webkit-scrollbar{display:none}.board-slide{scroll-snap-align:start;scroll-snap-stop:always;flex:0 0 100%;height:100%;position:relative}.board-safe{overscroll-behavior:contain;scrollbar-width:thin;flex-direction:column;display:flex;position:absolute;inset:0;overflow-y:auto;container:stage/size}.board-safe>*{animation:fade-in .5s var(--ease-out)}.live-progress{z-index:5;gap:3px;height:12px;display:flex;position:absolute;top:0;left:0;right:0}.live-progress button{cursor:pointer;background:0 0;border:0;flex-basis:0;height:100%;padding:0;position:relative}.live-progress button:disabled{cursor:default}.live-progress button:before,.live-progress button:after{content:"";height:var(--bar,3px);transition:height .15s;position:absolute;inset:0 0 auto}.live-progress 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button{width:34px;height:34px;color:var(--t-stage-ink);border-radius:50%;place-items:center;transition:background-color .2s;display:grid}.board-pager button:hover:not(:disabled){background:var(--t-stage-soft)}.board-controls{background:color-mix(in srgb, var(--t-stage) 82%, transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--t-stage-line);border-radius:999px;align-items:center;gap:2px;padding:3px;display:flex}.board-controls button{width:34px;height:34px;color:var(--t-stage-ink);border-radius:50%;place-items:center;transition:background-color .2s;display:grid}.board-controls button:hover{background:var(--t-stage-soft)}.board-count{font-variant-numeric:tabular-nums;white-space:nowrap;padding:0 6px;font-size:13px;font-weight:600}.board-count span{color:var(--t-stage-muted);font-weight:500}.live-badge{background:color-mix(in srgb, var(--t-live) 14%, transparent);color:var(--t-live);border-radius:999px;align-items:center;gap:7px;padding:6px 11px;font-size:12.5px;font-weight:700;display:inline-flex}.live-badge i,.pill-button.is-live i,.live-dot{background:var(--t-live);width:7px;height:7px;animation:pulse-live 2s var(--ease-out) infinite;border-radius:50%}.board-actions{gap:8px;margin-left:auto;display:flex}.pill-button{min-height:38px;color:var(--t-stage-ink);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:border-color .2s, transform .25s var(--ease-spring);white-space:nowrap;border-radius:999px;align-items:center;gap:8px;padding:0 14px;font-size:13.5px;font-weight:500;display:inline-flex;background:color-mix(in srgb, var(--t-stage) 82%, transparent)!important;border:1px solid var(--t-stage-line)!important}.pill-button:hover{transform:translateY(-1px);border-color:var(--t-accent)!important}.pill-button.is-live{color:var(--t-text);animation:rise .35s var(--ease-out);border-color:color-mix(in srgb, var(--t-live) 40%, 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var(--ease-out);position:absolute;bottom:12px;left:50%;transform:translate(-50%);background:var(--t-raise)!important}.jump-latest:hover{transform:translate(-50%)translateY(-1px)}.jump-latest svg{transform:rotate(90deg)}.sheet-composer .jump-latest{bottom:calc(100% + 10px)}.chat-voice{padding:12px 4px}.chat-voice>p{color:var(--t-text-2);margin:0 0 18px;font-size:14.5px;line-height:1.55}.chat-voice>span{color:var(--t-text-3);letter-spacing:.04em;text-transform:uppercase;margin-bottom:8px;font-size:12px;display:block}.chat-voice .starter-chips{justify-content:flex-start}.chat-voice .starter-chips button{min-height:36px;padding:7px 12px;font-size:13.5px}.thread{flex-direction:column;gap:22px;display:flex}.thread-turn{animation:rise .5s var(--ease-out) both;flex-direction:column;gap:10px;display:flex}.bubble-you{background:var(--t-surface-2);border-radius:18px 18px 6px;align-self:flex-end;max-width:86%;margin:0;padding:10px 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var(--t-line)!important}.board-link:hover{color:var(--t-text);border-color:var(--t-accent)!important}.board-link.is-current{color:var(--t-accent);background:var(--t-accent-soft)!important;border-color:#0000!important}.speaking{height:14px;color:var(--t-accent);align-items:center;gap:2px;display:inline-flex}.speaking i{background:currentColor;border-radius:2px;width:3px;height:100%;animation:1s ease-in-out infinite wave}.speaking i:nth-child(2){animation-delay:-.3s}.speaking i:nth-child(3){animation-delay:-.6s}.speaking i:nth-child(4){animation-delay:-.15s}.suggested-questions{flex-direction:column;gap:6px;margin:0 0 8px 36px;display:flex}.suggested-questions>span{color:var(--t-text-3);margin-bottom:2px;font-size:12.5px}.suggested-questions button{text-align:left;min-height:42px;color:var(--t-text);border-radius:14px;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;font-size:14px;transition:border-color .2s,background-color .2s;display:flex;border:1px solid var(--t-line)!important}.suggested-questions button svg{color:var(--t-text-3);transition:transform .25s var(--ease-spring), color .2s;flex-shrink:0}.suggested-questions button:hover{border-color:var(--t-accent)!important;background:var(--t-accent-soft)!important}.suggested-questions button:hover svg{color:var(--t-accent);transform:translate(3px)}.dock{z-index:5;background:var(--t-surface);border:1px solid var(--t-line);border-radius:0 0 var(--radius-stage) var(--radius-stage);border-top-color:#0000;grid-area:dock;position:relative}.dock:before{content:"";background:var(--t-line);height:1px;position:absolute;top:0;left:16px;right:16px}.dock-caption{text-align:center;justify-content:center;min-height:18px;padding:12px 20px 0;display:flex}.dock-caption p{max-width:60ch;color:var(--t-text);text-wrap:pretty;animation:caption-in .4s var(--ease-out);margin:0;font-size:15px;line-height:1.5}.dock-caption.is-listening p{color:var(--t-text);font-weight:500}.dock-caption 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sheet-up{0%{transform:translateY(100%)}}@keyframes drawer-in{0%{transform:translate(-100%)}}@media (prefers-reduced-motion:reduce){.player *,.player :before,.player :after,.player-sheet,.player-sheet *,.player-sheet::backdrop{transition:none!important;animation:none!important}.board-track{scroll-behavior:auto}}@media (forced-colors:active){.canvas,.chat,.dock,.player-sheet,.type-field,.round-button{border:1px solid canvastext}.type-field:focus-within{outline-offset:2px;outline:2px solid highlight}.mic-button,.send-button{color:highlighttext;background:highlight!important}.canvas-shell:before{display:none}}.player .type-field textarea:focus-visible,.player-sheet .type-field textarea:focus-visible{outline:0}@media (max-width:480px){.board-actions:is(:has(.is-live),:has(.board-controls)) .explain-again{justify-content:center;width:38px;padding:0}.board-actions:is(:has(.is-live),:has(.board-controls)) .explain-again span{display:none}}.live-badge.is-paused{background:var(--t-stage-soft);color:var(--t-stage-muted)}.live-badge.is-paused i{background:var(--t-stage-muted);animation:none}.round-button.is-small{width:44px;min-width:44px;height:44px}.round-button:disabled{opacity:.4;cursor:default}.sound-unblock{margin:0 auto 10px;display:flex}.board-pager button{width:44px;height:44px}.dev-panel{z-index:40;background:color-mix(in srgb, var(--t-surface) 94%, transparent);border:1px solid var(--t-line);max-width:min(320px,100vw - 24px);box-shadow:var(--t-shadow);color:var(--t-text-2);pointer-events:none;border-radius:12px;padding:10px 12px;font:12px/1.45 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;position:fixed;bottom:12px;left:12px}.dev-panel dl{gap:2px;margin:0;display:grid}.dev-panel div{grid-template-columns:92px 1fr;gap:8px;display:grid}.dev-panel dt{color:var(--t-text-3)}.dev-panel dd{color:var(--t-text);text-overflow:ellipsis;white-space:nowrap;margin:0;overflow:hidden}
.player-header{z-index:20;position:relative}.account-control{flex-shrink:0;margin-left:6px;position:relative}.account-trigger{max-width:220px;min-height:44px;color:var(--t-text);border-radius:999px;align-items:center;gap:9px;padding:4px 9px;transition:background-color .15s;display:flex}.account-trigger:hover,.account-trigger[aria-expanded=true]{background:var(--t-surface-2)}.account-trigger[aria-disabled=true]{opacity:.55;cursor:wait}.account-avatar{background:var(--t-accent-soft);width:32px;height:32px;color:var(--t-accent-text);letter-spacing:.02em;border-radius:50%;flex-shrink:0;place-items:center;font-size:12px;font-weight:600;display:inline-grid}.account-avatar--large{width:56px;height:56px;font-size:20px}.account-name{text-overflow:ellipsis;white-space:nowrap;max-width:128px;font-size:13px;font-weight:500;overflow:hidden}.account-chevron{color:var(--t-text-3);display:flex;transform:rotate(180deg)}.account-trigger[aria-expanded=true] .account-chevron{transform:rotate(0)}.account-dropdown{border:1px solid var(--t-line);background:var(--t-surface);width:min(280px,100vw - 32px);max-height:calc(100dvh - 90px);box-shadow:var(--t-shadow);border-radius:18px;padding:8px;position:absolute;top:calc(100% + 8px);right:0;overflow-y:auto}.account-summary{overflow-wrap:anywhere;gap:4px;padding:12px 12px 14px;display:grid}.account-summary strong{font-size:14px;font-weight:600}.account-summary>span{color:var(--t-text-2);font-size:12px;line-height:1.5}.account-dropdown [role=menuitem]{width:100%;min-height:44px;color:var(--t-text);text-align:left;border-radius:10px;align-items:center;gap:11px;padding:10px 12px;font-size:14px;display:flex}.account-dropdown [role=menuitem]:hover,.account-dropdown [role=menuitem]:focus-visible{background:var(--t-surface-2)}.account-dropdown [role=menuitem][aria-disabled=true]{opacity:.5;cursor:wait}.account-menu-divider{background:var(--t-line);height:1px;margin:6px 8px}.account-error{background:var(--t-surface-2);color:var(--t-warn);border-radius:8px;margin:8px;padding:10px;font-size:12px;line-height:1.5}.account-profile-heading{align-items:center;gap:16px;margin:12px 0 26px;display:flex}.account-profile-heading h3{overflow-wrap:anywhere;margin:0;font-size:19px;font-weight:600;line-height:1.4}.account-profile-heading>div{min-width:0}.account-profile-heading p{color:var(--t-text-2);margin:5px 0 0;font-size:13px}.account-profile dl{margin:0}.account-profile dl>div{border-top:1px solid var(--t-line);grid-template-columns:100px minmax(0,1fr);gap:16px;padding:16px 0;display:grid}.account-profile dt{color:var(--t-text-2);font-size:13px}.account-profile dd{overflow-wrap:anywhere;margin:0;font-size:14px;line-height:1.5}.account-email-status{color:var(--t-accent-text);align-items:center;gap:5px;display:flex}@media (orientation:portrait),(max-width:719px){.account-control{margin-left:2px}.account-name{max-width:72px}}@media (max-width:480px){.account-trigger{gap:7px;padding-inline:5px}.account-chevron{display:none}.account-name{max-width:64px}.account-dropdown{right:0}.account-profile dl>div{grid-template-columns:90px minmax(0,1fr);gap:12px}}
.auth-page{background:var(--t-room);height:100dvh;color:var(--t-text);place-items:center;padding:24px;display:grid;overflow-y:auto}.auth-card{box-sizing:border-box;border:1px solid var(--t-line);background:var(--t-surface);width:min(100%,440px);box-shadow:var(--t-shadow);border-radius:24px;margin:auto 0;padding:36px;position:relative}.auth-brand{color:inherit;font-size:22px;font-weight:700;text-decoration:none}.auth-card h1{letter-spacing:-1px;margin:28px 0 8px;font-size:30px}.auth-card>p{opacity:.8;font-size:14px;line-height:1.6}.auth-card form{gap:20px;margin-top:28px;display:grid}.auth-card label{gap:8px;font-size:13px;font-weight:600;display:grid}.auth-card input{box-sizing:border-box;width:100%;color:inherit;font:inherit;background:0 0;border:1px solid #77858d66;border-radius:10px;padding:13px;font-size:16px}.auth-card input:focus{outline-offset:2px;outline:2px solid #8ce1bd}.auth-card small{opacity:.7;font-size:12px;font-weight:400}.auth-card button{font:inherit;cursor:pointer}.auth-card button:disabled{cursor:default;opacity:.55}.auth-primary{color:#0b2520;background:#8ce1bd;border:0;border-radius:10px;padding:14px;font-weight:700!important}.auth-link{color:inherit;text-underline-offset:4px;background:0 0;border:0;padding:8px 0;text-decoration:underline;font-size:13px!important}.auth-options{justify-content:space-between;gap:16px;margin:16px 0;display:flex}.auth-google{width:100%;color:inherit;background:0 0;border:1px solid #77858d66;border-radius:10px;padding:13px;font-size:13px!important}.auth-message{background:#8ce1bd19;border-radius:10px;padding:12px;opacity:1!important}.auth-name-fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;min-width:0;display:grid}.auth-name-fields label{min-width:0}.auth-card input[readonly]{background:var(--t-surface-2);color:var(--t-text-2);cursor:default}.auth-options--verify{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:10px;display:grid}.auth-options--verify .auth-link{text-align:center;font-variant-numeric:tabular-nums;min-width:0}.auth-options-separator{opacity:.35;-webkit-user-select:none;user-select:none;font-size:14px}@media (max-width:480px){.auth-card{padding:24px}.auth-page{padding:16px}.auth-name-fields{grid-template-columns:1fr}}.auth-dialog{box-sizing:border-box;background:var(--t-surface);width:min(464px,100vw - 32px);max-height:calc(100dvh - 32px);color:var(--t-text);box-shadow:var(--t-shadow);overscroll-behavior:contain;border:0;border-radius:24px;padding:0;overflow-y:auto}.auth-dialog::backdrop{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#050b12b8}.auth-dialog .auth-card{width:100%;box-shadow:none;margin:0;padding:24px}.auth-dialog .auth-card h1{margin-top:20px;font-size:26px}.auth-dialog .auth-card form{gap:14px;margin-top:20px}.auth-dialog .auth-options{margin:8px 0}.auth-dialog .auth-explore{margin-top:4px}.auth-card .auth-dismiss{min-width:44px;min-height:44px;color:var(--t-text-2);background:0 0;border:0;border-radius:12px;place-items:center;font-size:26px;line-height:1;display:grid;position:absolute;top:10px;right:10px}.auth-dismiss:hover{background:var(--t-surface-2)}.auth-explore{text-align:center;align-content:center;min-height:44px;margin:16px auto 0;display:block}.auth-card :focus-visible{outline:2px solid var(--t-accent);outline-offset:3px}.guest-account{white-space:nowrap;align-items:center;gap:6px;font-size:13px;font-weight:600;display:flex}.player .guest-account a{min-height:44px;font:inherit;border-radius:999px;justify-content:center;align-items:center;padding:0 16px;text-decoration:none;display:inline-flex}.player .guest-sign-in{color:var(--t-text);border:1px solid var(--t-line)}.player .guest-sign-up{background:var(--t-accent);color:var(--t-accent-ink,#0b2520)}.player .guest-sign-in:hover{background:var(--t-surface-2)}.player .guest-sign-up:hover{filter:brightness(1.08)}@media (max-width:700px){.player[data-auth-state=public] .lesson-heading,.player[data-auth-state=public] .header-divider,.player[data-auth-state=public] .lesson-status{display:none}.player[data-auth-state=public] .header-end{margin-left:auto}.player[data-auth-state=public] .player-header{gap:8px}.player .guest-account a{padding:0 12px}.guest-account{gap:4px}}@media (max-width:390px){.player[data-auth-state=public] .header-end>.icon-button{display:none}.guest-account{font-size:12px}.player .guest-account a{padding:0 10px}}.auth-prompt-actions{gap:12px;margin-top:24px;display:grid}.auth-prompt-actions a{border-radius:10px;justify-content:center;align-items:center;min-height:48px;padding:12px;font-size:14px;font-weight:600;text-decoration:none;display:flex}.auth-secondary{border:1px solid var(--t-line-strong);color:var(--t-text)}.auth-secondary:hover{background:var(--t-surface-2)}.auth-link[aria-disabled=true]{opacity:.55;cursor:default}.auth-terms{opacity:.75;margin:12px 0 0;font-size:12px;line-height:1.5}.auth-terms a{text-underline-offset:3px;text-decoration:underline}