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span{background:var(--cyan-strong);border-radius:50%;width:28px;height:28px;animation:1.5s ease-in-out infinite pulse}@keyframes pulse{50%{opacity:.5}}.waiting-students{flex-wrap:wrap;justify-content:center;gap:8px;padding:24px;display:flex}.waiting-students span{background:var(--surface);border-radius:999px;padding:9px 13px;font-weight:650}.game-screen{min-height:100svh;padding:max(12px,env(safe-area-inset-top)) max(14px,env(safe-area-inset-right)) max(12px,env(safe-area-inset-bottom)) max(14px,env(safe-area-inset-left));flex-direction:column;display:flex;overflow:hidden}.game-screen.is-correct:after{content:"";z-index:45;pointer-events:none;background:var(--green);opacity:0;animation:success-flash .26s var(--ease-out);position:fixed;inset:0}@keyframes success-flash{35%{opacity:.16}}.game-screen.is-incorrect:after{content:"";z-index:45;pointer-events:none;background:var(--red);opacity:0;animation:error-flash .22s var(--ease-out);position:fixed;inset:0}@keyframes error-flash{35%{opacity:.11}}.game-screen.is-incorrect .answer-lane{animation:answer-nudge .22s var(--ease-out)}@keyframes answer-nudge{35%{transform:translate(-7px)}70%{transform:translate(4px)}}.score-rail{border-bottom:1px solid var(--line);grid-template-columns:minmax(110px,.7fr) minmax(100px,.6fr) 2.4fr minmax(90px,.55fr);display:grid}.rail-context,.rail-live,.rail-player{border:1px solid var(--line);border-bottom:0;min-height:78px;padding:10px 14px}.rail-context{flex-direction:column;justify-content:center;gap:6px;display:flex}.rail-context span{color:var(--muted);letter-spacing:.08em;text-transform:uppercase;font-size:.72rem;font-weight:700}.rail-context strong{font-size:1.1rem}.rail-context .score-font{font-size:1.65rem}.rail-context small{color:var(--muted);margin-left:4px;font-size:.85rem}.rail-scores{grid-template-columns:repeat(auto-fit,minmax(100px,1fr));display:grid}.rail-player{grid-template-columns:1fr auto;align-items:center;gap:4px 8px;display:grid;position:relative}.rail-player+.rail-player{border-left:0}.rail-player>span{text-overflow:ellipsis;font-weight:700;overflow:hidden}.rail-player>strong{grid-area:1/2/span 2;font-size:1.9rem}.rail-player i{color:var(--muted);display:flex}.rail-player i svg{width:13px;height:13px}.rail-player.is-current{background:var(--cyan);color:#030e1c;border-color:var(--cyan)}.rail-player.is-current i{color:#102031}.rail-player.is-scoring>strong{z-index:2;animation:score-pop .24s var(--ease-out);position:relative}@keyframes score-pop{45%{transform:scale(1.22)}}.score-gain{z-index:3;color:var(--green);pointer-events:none;animation:score-gain .24s var(--ease-out) both;font-size:.82rem;position:absolute;top:4px;right:8px}@keyframes score-gain{0%{opacity:0;transform:translateY(7px)scale(.95)}40%{opacity:1}to{opacity:0;transform:translateY(-13px)scale(1)}}.score-sparks{z-index:1;pointer-events:none;position:absolute;inset:50%}.score-sparks i{background:var(--green);opacity:0;width:7px;height:7px;animation:score-spark .26s var(--ease-out);border-radius:2px;position:absolute}.score-sparks i:first-child{--spark-x:-38px;--spark-y:-25px}.score-sparks i:nth-child(2){--spark-x:0px;--spark-y:-38px}.score-sparks i:nth-child(3){--spark-x:38px;--spark-y:-22px}.score-sparks i:nth-child(4){--spark-x:42px;--spark-y:20px}.score-sparks i:nth-child(5){--spark-x:0px;--spark-y:36px}.score-sparks i:nth-child(6){--spark-x:-40px;--spark-y:22px}@keyframes score-spark{0%{opacity:1;transform:translate(0)scale(.9)}to{opacity:0;transform:translate3d(var(--spark-x),var(--spark-y),0) scale(.35)}}.rail-live{color:var(--green);text-transform:uppercase;justify-content:center;align-items:center;gap:8px;font-size:.78rem;font-weight:750;display:flex}.status-dot{background:var(--green);border-radius:50%;width:10px;height:10px}.status-dot.is-offline{background:var(--amber)}.game-paused-banner{border-bottom:1px solid var(--brand-blue);justify-content:center;align-items:center;gap:12px;min-height:60px;padding:10px 18px;display:flex}@supports (color:color-mix(in lab,red,red)){.game-paused-banner{border-bottom:1px solid color-mix(in oklch,var(--brand-blue) 35%,var(--line))}}.game-paused-banner{background:var(--brand-blue)}@supports (color:color-mix(in lab,red,red)){.game-paused-banner{background:color-mix(in oklch,var(--brand-blue) 10%,var(--surface))}}.game-paused-banner{color:var(--brand-blue);text-align:left}.game-paused-banner>svg{flex:none;width:22px;height:22px}.game-paused-banner>span{gap:1px;display:grid}.game-paused-banner small{color:var(--brand-blue)}@supports (color:color-mix(in lab,red,red)){.game-paused-banner small{color:color-mix(in oklch,var(--brand-blue) 72%,var(--ink))}}.game-screen.is-paused .buzz-button{border-color:var(--line-strong);background:var(--surface);color:var(--muted)}.game-screen.is-paused .role-banner{border-color:var(--line-strong);color:var(--muted)}.game-court{flex:1;grid-template-columns:minmax(0,3.2fr) minmax(260px,1fr);align-items:stretch;min-height:0;display:grid}.learning-zone{border-right:1px solid var(--line);flex-direction:column;justify-content:center;align-items:center;gap:clamp(10px,2vh,20px);min-width:0;padding:clamp(16px,3vw,38px);display:flex}.role-banner{border:1px solid var(--cyan);border-radius:var(--radius-md);max-width:100%;color:var(--cyan-strong);text-transform:uppercase;align-items:center;gap:12px;padding:10px 18px;font-size:clamp(.85rem,1.7vw,1.15rem);font-weight:760;display:inline-flex}.verb-card-stage{perspective:1000px;width:min(100%,820px)}.verb-card{border:2px solid var(--line);border-radius:var(--radius-lg);background:var(--surface-raised);min-height:clamp(190px,28vh,300px);animation:card-deal .24s var(--ease-out);transform-origin:70% 0;place-content:center;justify-items:center;gap:12px;padding:28px clamp(24px,5vw,62px);display:grid;position:relative;overflow:hidden}.verb-card:before{content:"";border:1px solid var(--cyan);position:absolute;inset:10px}@supports (color:color-mix(in lab,red,red)){.verb-card:before{border:1px solid color-mix(in oklch,var(--cyan) 58%,var(--line))}}.verb-card:before{border-radius:var(--radius-md);pointer-events:none}.verb-card-label{color:var(--cyan-strong);font-size:.78rem;font-weight:760;position:relative}.verb-card-mark{color:var(--muted);font-size:.9rem;font-weight:700;position:absolute;top:20px;right:22px}@keyframes card-deal{0%{opacity:0;transform:translate(52px,-18px)rotate(2.5deg)scale(.96)}to{opacity:1;transform:translate(0)rotate(0)scale(1)}}.verb-display{max-width:100%;color:var(--ink);letter-spacing:-.04em;text-align:center;text-transform:uppercase;overflow-wrap:anywhere;font-size:clamp(3.2rem,9vw,7.5rem);line-height:.88;position:relative}.verb-length-9,.verb-length-10,.verb-length-11,.verb-length-12{font-size:clamp(2.6rem,7vw,6rem)}.answer-lane{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);width:min(100%,820px);min-height:112px;padding:12px 14px;transition:border-color .18s,background-color .18s}.answer-lane.is-active{border-color:var(--cyan);background:var(--surface-raised)}.answer-control{grid-template-columns:1fr auto;gap:10px;display:grid}.answer-control .button{min-width:130px}.locked-hint{color:var(--muted);align-items:center;gap:7px;margin-top:7px;font-size:.78rem;display:flex}.locked-hint svg{width:15px;height:15px}.answer-reveal{color:var(--muted);flex-wrap:wrap;justify-content:center;gap:8px;font-size:.85rem;display:flex}.answer-reveal span,.answer-reveal strong{background:var(--green-soft);border-radius:var(--radius-sm);padding:5px 9px}.buzz-zone{flex-direction:column;justify-content:center;align-items:center;gap:18px;padding:clamp(16px,3vw,36px);display:flex}.buzz-button{aspect-ratio:1;border:4px solid var(--red);background:var(--red);color:#fff;cursor:pointer;letter-spacing:-.025em;width:clamp(164px,17vw,235px);transition:transform .12s var(--ease-out),background-color .16s var(--ease-out),border-color .16s var(--ease-out),color .16s var(--ease-out),opacity .16s var(--ease-out);box-shadow:inset 0 0 0 8px var(--canvas);border-radius:50%;place-content:center;justify-items:center;gap:4px;font-size:clamp(1.7rem,3.2vw,2.7rem);font-weight:820;display:grid}.buzz-button svg{fill:currentColor;width:2.4rem;height:2.4rem}.buzz-button small{letter-spacing:.12em;font-family:Space Mono,ui-monospace,monospace;font-size:.62rem;font-weight:700}.buzz-button.is-available{border-color:var(--red);background:var(--red);color:#fff}.buzz-button.is-available:disabled{opacity:.86}.buzz-button.is-locked{border-color:var(--buzz-locked);background:var(--buzz-locked);color:var(--buzz-locked-ink);cursor:not-allowed}.buzz-button.is-winner{border-color:var(--cyan-strong);background:var(--cyan-strong);color:#fff;cursor:not-allowed}.buzz-button.is-pressed{will-change:transform;animation:buzz-rebound .16s var(--ease-out)}@keyframes buzz-rebound{0%{transform:scale(1)}38%{transform:scale(.95)}72%{transform:scale(1.025)}to{transform:scale(1)}}.buzz-status{text-align:center;flex-direction:column;align-items:center;gap:5px;min-height:88px;display:flex}.buzz-status strong{font-size:1.08rem}.buzz-status small{color:var(--muted);max-width:25ch}.arena-streak{background:var(--red-soft);color:var(--red);border-radius:999px;align-items:center;gap:5px;margin-top:3px;padding:5px 8px;font-size:.7rem;font-weight:760;display:inline-flex}.arena-streak svg{fill:currentColor;width:14px;height:14px}.countdown{color:var(--cyan-strong);align-items:center;gap:6px;font-size:2.2rem;display:flex}.countdown svg{width:1.35rem}.game-footer{border-top:1px solid var(--line);justify-content:space-between;align-items:center;padding-top:8px;display:flex}.game-footer>div{gap:5px;display:flex}.flying-verb-card{z-index:55;border:2px solid var(--green);border-radius:var(--radius-lg);background:var(--surface-raised);color:var(--ink);pointer-events:none;transform-origin:50%;animation:card-to-score .27s var(--ease-in-out) forwards;place-content:center;justify-items:center;gap:8px;padding:22px;display:grid;position:fixed}.flying-verb-card span{color:var(--green);font-size:.72rem;font-weight:760}.flying-verb-card strong{letter-spacing:-.04em;text-align:center;text-transform:uppercase;overflow-wrap:anywhere;max-width:100%;font-size:clamp(2.4rem,7vw,6rem);line-height:.9}@keyframes card-to-score{0%{opacity:1;transform:translate(0)rotate(0)scale(1)}to{opacity:0;transform:translate3d(var(--fly-x),var(--fly-y),0) rotate(-4deg) scale(.12)}}.toast{z-index:60;right:max(20px,env(safe-area-inset-right));bottom:max(20px,env(safe-area-inset-bottom));border-radius:var(--radius-md);background:var(--ink);max-width:min(380px,100vw - 40px);color:var(--canvas);box-shadow:var(--shadow-dialog);animation:toast-in .18s var(--ease-out);padding:13px 16px;font-weight:650;position:fixed}.toast-success{background:var(--green);color:#fff}.toast-error{background:var(--red);color:#fff}@keyframes toast-in{0%{opacity:0;transform:translateY(8px)scale(.98)}}.arena-reward-toast{z-index:62;top:max(96px,calc(env(safe-area-inset-top) + 72px));right:max(20px,env(safe-area-inset-right));border:1px solid var(--brand-blue);grid-template-columns:44px minmax(0,1fr);align-items:center;gap:12px;width:min(360px,100vw - 40px);display:grid;position:fixed}@supports (color:color-mix(in lab,red,red)){.arena-reward-toast{border:1px solid color-mix(in srgb,var(--brand-blue) 36%,var(--line))}}.arena-reward-toast{border-radius:var(--radius-md);background:var(--surface-raised);color:var(--ink);box-shadow:var(--shadow-dialog);animation:reward-toast-in .24s var(--ease-out) both;padding:13px 15px}.arena-reward-toast>span{background:var(--cyan-soft);width:44px;height:44px;color:var(--brand-blue);border-radius:50%;place-items:center;display:grid}.arena-reward-toast>div{gap:1px;display:grid}.arena-reward-toast small{color:var(--brand-blue);letter-spacing:.08em;text-transform:uppercase;font-size:.66rem;font-weight:760}.arena-reward-toast p{color:var(--muted);font-size:.78rem}@keyframes reward-toast-in{0%{opacity:0;transform:translateY(-9px)scale(.97)}}.final-screen{min-height:100svh;padding:20px max(20px,env(safe-area-inset-right)) max(20px,env(safe-area-inset-bottom)) max(20px,env(safe-area-inset-left));grid-template-rows:auto 1fr auto;grid-template-columns:minmax(300px,.8fr) minmax(360px,1.2fr);gap:28px;display:grid}.final-screen .simple-header{grid-column:1/-1;padding:0 0 16px}.podium{flex-direction:column;gap:18px;display:flex}.podium h1{font-size:clamp(2.5rem,6vw,5rem)}.ranking{gap:8px;display:grid}.ranking-row{background:var(--surface);border-radius:var(--radius-md);grid-template-columns:42px 1fr auto;align-items:center;gap:10px;min-height:60px;padding:10px 14px;display:grid}.ranking-row.is-current{background:var(--cyan-soft);outline:2px solid var(--cyan)}.rank{color:var(--muted);font-family:Space Mono}.arena-final-rewards{border-top:1px solid var(--line);gap:8px;margin-top:10px;padding-top:16px;display:grid}.arena-final-rewards>span{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-size:.72rem;font-weight:740}.arena-final-rewards>div{flex-wrap:wrap;gap:7px;display:flex}.arena-final-rewards>div>span{background:var(--cyan-soft);color:var(--brand-blue);border-radius:999px;align-items:center;gap:6px;padding:7px 10px;font-weight:720;display:inline-flex}.arena-final-rewards svg{width:15px;height:15px}.error-review{background:var(--surface);border-radius:var(--radius-lg);align-self:start;gap:18px;padding:20px;display:grid}.error-review ul{gap:7px;max-height:56vh;margin:0;padding:0;list-style:none;display:grid;overflow:auto}.error-review li{border-bottom:1px solid var(--line);grid-template-columns:minmax(90px,.5fr) 1fr;gap:2px 12px;padding:11px 0;display:grid}.error-review li small{color:var(--muted);grid-column:2}.empty-success{color:var(--green);justify-items:start;gap:5px;display:grid}.final-screen>.button{justify-self:start}dialog{color:var(--ink)}dialog::backdrop{background:var(--ink)}@supports (color:color-mix(in lab,red,red)){dialog::backdrop{background:color-mix(in oklch,var(--ink) 52%,transparent)}}.rules-dialog,.editor-dialog,.leave-session-dialog,.end-session-dialog{border-radius:var(--radius-lg);background:var(--surface-raised);width:min(620px,100vw - 32px);max-height:calc(100svh - 32px);box-shadow:var(--shadow-dialog);border:0;padding:22px;overflow:auto}.dialog-heading{justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:20px;display:flex}.dialog-heading h2{font-size:1.75rem}.leave-session-dialog{width:min(500px,100vw - 32px)}.end-session-dialog{width:min(520px,100vw - 32px)}.leave-session-copy{gap:10px;margin-bottom:22px;display:grid}.leave-session-copy h2{font-size:clamp(1.5rem,5vw,2rem)}.leave-session-copy>p:last-child{color:var(--muted);line-height:1.6}.segmented-control{border-radius:var(--radius-md);background:var(--surface);grid-template-columns:1fr 1fr;padding:4px;display:grid}.segmented-control button{border-radius:var(--radius-sm);cursor:pointer;background:0 0;border:0;min-height:42px;font-weight:650}.segmented-control button[aria-pressed=true]{background:var(--surface-raised);color:var(--cyan-strong)}.rules-list{gap:12px;padding-left:24px;line-height:1.55;display:grid}.login-screen{min-height:100svh;padding:max(18px,env(safe-area-inset-top)) max(20px,env(safe-area-inset-right)) max(20px,env(safe-area-inset-bottom)) max(20px,env(safe-area-inset-left));grid-template-rows:auto 1fr;display:grid}.login-top{justify-content:space-between;display:flex}.login-form{gap:18px;width:min(100%,430px);margin:auto;padding-block:40px;display:grid}.login-form h1{font-size:2.5rem}.login-form>p:not(.context-label,.form-error){color:var(--muted)}.login-icon{border-radius:var(--radius-md);background:var(--cyan-soft);width:58px;height:58px;color:var(--cyan-strong);place-items:center;display:grid}.teacher-shell{min-height:100svh}.teacher-header{z-index:30;min-height:68px;padding:max(10px,env(safe-area-inset-top)) max(20px,env(safe-area-inset-right)) 10px max(20px,env(safe-area-inset-left));border-bottom:1px solid var(--line);background:var(--canvas);grid-template-columns:auto 1fr auto;align-items:center;gap:26px;display:grid;position:sticky;top:0}.teacher-header nav{gap:4px;display:flex}.teacher-header nav a{border-radius:var(--radius-md);min-height:44px;color:var(--muted);align-items:center;gap:8px;padding:8px 12px;font-weight:650;text-decoration:none;display:inline-flex}.teacher-header nav a.active{color:var(--cyan-strong);background:var(--cyan-soft)}.teacher-main{width:min(100%,1500px);padding:34px max(20px,env(safe-area-inset-right)) 70px max(20px,env(safe-area-inset-left));margin:0 auto}.dashboard-hero,.catalog-hero{justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:34px;display:flex}.dashboard-hero h1,.catalog-hero h1{margin-top:7px;font-size:clamp(2.5rem,5vw,4.8rem)}.dashboard-hero p:last-child,.catalog-hero p:last-child{max-width:62ch;color:var(--muted);font-size:1.05rem}.signal-mark{border-radius:var(--radius-lg);background:var(--cyan);color:#051220;place-items:center;width:74px;height:74px;display:grid}.signal-mark svg{width:34px;height:34px}.block-picker{gap:24px;display:grid}.section-heading{justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.block-options{flex-wrap:wrap;gap:10px;display:flex}.block-option{border:1px solid 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nav{grid-area:2/1/auto/-1;justify-content:flex-start}.home-footer{grid-template-columns:auto 1fr auto}.home-footer nav{grid-area:2/1/auto/-1;justify-content:flex-start}}@media(max-width:720px){.marketing-hero{width:min(100% - 32px,1100px);padding-top:58px}.marketing-hero h1{font-size:clamp(2.8rem,13vw,4.5rem)}.marketing-section{grid-template-columns:34px 1fr;gap:12px;width:min(100% - 32px,1100px)}.marketing-section ul{grid-template-columns:1fr}.marketing-faq{grid-template-columns:1fr;gap:38px;width:min(100% - 32px,1100px)}.marketing-related{width:min(100% - 32px,1100px)}.marketing-related>div{grid-template-columns:1fr}.marketing-related a+a{border-top:1px solid var(--line);border-left:0}.marketing-cta{padding-inline:16px}.marketing-cta>div:last-child{width:100%;display:grid}.marketing-footer{grid-template-columns:1fr;justify-items:start;padding:30px 16px}.marketing-footer nav{grid-area:auto/1}.home-footer{grid-template-columns:1fr;justify-items:start}.home-footer 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