:root{--cr-ink:#152a35;--cr-muted:#64747c;--cr-green:#b9ed57;--cr-paper:#f5f6f0;--cr-line:#dde3da;--cr-blue:#2777bb;--cr-dark:#142c35;--cr-radius:20px}*{box-sizing:border-box}body{margin:0;background:var(--cr-paper);color:var(--cr-ink);font-family:Inter,"Segoe UI",Arial,sans-serif;font-size:15px;line-height:1.55}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}a{color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}[hidden]{display:none!important}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #287bbd;outline-offset:4px}.cr-header{height:88px;padding:0 max(26px,calc((100vw - 1220px)/2));display:flex;align-items:center;gap:30px;border-bottom:1px solid var(--cr-line);background:#fff}.cr-brand{text-decoration:none;display:flex;align-items:center;flex-shrink:0}.cr-brand img{display:block;width:172px;height:auto}.cr-product{font-size:29px;letter-spacing:-1px;text-decoration:none;border-left:1px solid #c9d2c6;padding-left:30px;font-weight:900;white-space:nowrap}.cr-product span{color:#19bf70}.cr-header nav{margin-left:auto;display:flex;align-items:center;gap:25px;font-size:13px;font-weight:650}.cr-header nav a{text-decoration:none}.cr-icon-button{background:none;border:1px solid var(--cr-line);border-radius:20px;padding:7px 12px;font-size:12px}.cr-main{max-width:1220px;padding:0 26px 60px;margin:auto}.cr-eyebrow{font-size:11px;letter-spacing:2px;font-weight:800;display:inline-flex;align-items:center;gap:8px}.cr-live-dot{display:inline-block;width:7px;height:7px;background:#4b9b54;border-radius:50%;margin-left:5px;box-shadow:0 0 0 4px #4b9b5412}.cr-hero{min-height:510px;padding:64px 0 54px;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center}.cr-hero h1,.cr-board-hero h1{font-size:clamp(42px,4.6vw,64px);font-weight:760;letter-spacing:-3px;line-height:1.07;margin:20px 0 24px}.cr-hero p{font-size:17px;max-width:490px;line-height:1.7;color:var(--cr-muted)}.cr-hero-actions{display:flex;gap:25px;align-items:center;margin:28px 0}.cr-button{display:inline-flex;align-items:center;justify-content:center;gap:24px;padding:13px 22px;border:1px solid transparent;border-radius:10px;background:var(--cr-green);color:var(--cr-ink);font-weight:750;text-decoration:none;font-size:14px;transition:background .18s,transform .18s}.cr-button:hover:not(:disabled){background:#a8df45;transform:translateY(-1px)}.cr-button-light{background:white;border-color:var(--cr-line);font-weight:650}.cr-button-light:hover:not(:disabled){background:#edf1e9}.cr-button-dark{background:var(--cr-ink);color:white}.cr-button-dark:hover:not(:disabled){background:#264956}.cr-text-link{background:none;border:0;padding:5px 0;font-weight:650;font-size:13px;text-decoration:none}.cr-facts{display:flex;gap:18px;font-size:11px;color:var(--cr-muted);font-weight:650}.cr-facts span:before{content:'✓';color:#488247;margin-right:6px}.cr-hero-art{position:relative;height:380px;display:grid;place-items:center}.cr-orbit{position:absolute;width:370px;height:370px;border-radius:50%;border:1px dashed #c2cfc1;background:radial-gradient(circle,#e4edda 0,#edf1e6 56%,transparent 57%)}.cr-demo-card{position:absolute;width:238px;height:308px;border-radius:19px;box-shadow:0 15px 34px #152a3512}.cr-demo-back{background:#223e48;color:#bddbca;border:8px solid #fff;font-size:100px;display:grid;place-items:center;transform:rotate(-15deg) translate(-29px,-2px);background-image:repeating-linear-gradient(45deg,transparent,transparent 12px,#ffffff08 12px,#ffffff08 13px)}.cr-demo-front{background:#fff;padding:24px;transform:rotate(8deg) translate(26px,0);border:1px solid #e4e9df}.cr-mini-label{font-size:9px;font-weight:800;letter-spacing:1.4px;display:flex;justify-content:space-between}.cr-demo-symbol{display:block;font:italic 41px Georgia,serif;margin:34px 0 18px;text-align:center}.cr-demo-front p{font-size:16px;line-height:1.35;color:var(--cr-ink);font-weight:650}.cr-demo-answer{background:#edf7df;padding:12px 10px;border-radius:8px;font-size:11px;color:#3d6b2e;display:flex;justify-content:space-between}.cr-floating-badge{position:absolute;bottom:17px;right:8px;padding:13px 17px;background:var(--cr-green);font-weight:700;font-size:12px;border-radius:30px;transform:rotate(-4deg);box-shadow:0 5px 15px #152a3512}.cr-panel{background:#fff;border:1px solid var(--cr-line);border-radius:var(--cr-radius);padding:28px}.cr-panel h2,.cr-section-heading h2{font-size:23px;letter-spacing:-.8px;line-height:1.2;margin:10px 0}.cr-panel p{color:var(--cr-muted);font-size:14px}.cr-profile{display:flex;justify-content:space-between;align-items:center;gap:24px;background:#edf1e6;margin-bottom:32px}.cr-profile h2{font-size:18px;margin:5px 0}.cr-profile p{margin:5px 0;font-size:12px}.cr-profile form{display:flex;align-items:end;gap:10px}.cr-profile select{max-width:210px}label{display:block;font-size:12px;font-weight:700;color:#4d6069}input,select{display:block;width:100%;padding:11px 12px;border:1px solid #dce2da;border-radius:8px;background:#fbfcf9;color:var(--cr-ink);margin-top:6px;font-size:14px;min-height:44px}select{padding-right:25px}input[type=checkbox]{display:inline-block;width:17px;min-height:17px;height:17px;margin:0;accent-color:#46854d}.cr-play-grid{display:grid;grid-template-columns:1.14fr 1fr;gap:24px;scroll-margin-top:20px}.cr-side-panels{display:flex;flex-direction:column;gap:24px}.cr-side-panels>.cr-panel{flex:1}.cr-quick{background:#e9efec}.cr-quick .cr-button{width:100%;margin-top:20px}.cr-inline-form{display:flex;gap:10px;margin-top:20px}.cr-inline-form input{margin:0;letter-spacing:5px;font-weight:700;text-transform:uppercase;min-width:0}.cr-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}.cr-wide{grid-column:1/-1}.cr-topics{border-top:1px solid var(--cr-line);border-bottom:1px solid var(--cr-line);margin:22px 0 12px;padding:15px 0}.cr-topics summary{cursor:pointer;font-size:13px;font-weight:700}.cr-topic-summary{float:right;color:var(--cr-muted);font-size:11px;font-weight:500;margin-right:8px}.cr-topic-list{max-height:260px;overflow:auto;padding:4px 2px}.cr-topic-list label{display:flex;align-items:center;gap:9px;padding:8px 0;font-size:12px;font-weight:500}.cr-topic-list label span{flex:1}.cr-topic-list small{font-size:11px;color:var(--cr-muted)}.cr-availability{font-size:12px!important;color:#3b793e!important;margin-bottom:5px}.cr-availability.cr-insufficient{color:#a44c37!important}.cr-deck-note{font-size:11px!important;margin-top:4px}.cr-create-button{width:100%;margin-top:8px}.cr-public{margin-top:48px}.cr-section-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin:18px 0}.cr-room-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.cr-room-tile{background:white;border:1px solid var(--cr-line);border-radius:14px;padding:20px}.cr-room-tile h3{margin:0 0 10px;font-size:17px}.cr-room-tile p{font-size:12px;color:var(--cr-muted)}.cr-room-tile .cr-button{width:100%;margin-top:8px}.cr-muted{color:var(--cr-muted);font-size:13px}.cr-resume{display:block;margin:20px 0;padding:16px 20px;border:1px solid #bfd4a4;background:#edf7df;border-radius:10px;font-weight:650;text-decoration:none}.cr-notice{position:fixed;left:50%;top:100px;transform:translateX(-50%);z-index:20;max-width:min(90vw,650px);padding:14px 22px;border-radius:12px;background:#1c3842;color:white;box-shadow:0 8px 25px #0002;font-size:14px}.cr-notice.error{background:#823b31}.cr-footer{border-top:1px solid var(--cr-line);padding:25px max(26px,calc((100vw - 1168px)/2));display:flex;justify-content:space-between;font-size:12px;color:var(--cr-muted)}.cr-footer a{text-decoration:none;font-weight:700}.cr-room-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:40px 0 28px}.cr-room-heading h1{font-size:34px;letter-spacing:-1.5px;margin:8px 0}.cr-lobby-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:24px}.cr-tag{font-size:10px;letter-spacing:1px;font-weight:800;border-radius:20px;padding:6px 12px;background:#eef3e8;white-space:nowrap}.cr-roster{display:grid;gap:10px;margin:22px 0}.cr-player{display:flex;align-items:center;gap:12px;background:#f5f7f2;padding:13px;border-radius:10px}.cr-player-icon{font-size:22px;width:38px;height:38px;display:grid;place-items:center;background:white;border-radius:50%}.cr-player strong{font-size:14px}.cr-player small{display:block;font-size:11px;color:var(--cr-muted)}.cr-player .cr-tag{margin-left:auto}.cr-player select{width:105px;margin:0;padding:6px;font-size:12px}.cr-seat-empty{padding:16px;border:1px dashed #dce2d7;border-radius:10px;color:#89968d;font-size:13px}.cr-settings-summary{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.cr-actions{display:flex;gap:12px;flex-wrap:wrap}.cr-invite{text-align:center;background:#e9efe7}.cr-code{font-size:36px!important;color:var(--cr-ink)!important;letter-spacing:7px;font-weight:800;margin:22px 0 12px!important}.cr-invite img{display:block;border-radius:12px;margin:0 auto 20px}.cr-invite .cr-button{width:100%}#room-setup{margin-top:24px;max-width:670px}.cr-scoreboard{display:grid;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));gap:12px;margin-bottom:22px}.cr-score{background:white;border:1px solid var(--cr-line);border-top:3px solid var(--team-color,#527fa0);border-radius:13px;padding:15px 18px;display:flex;justify-content:space-between;align-items:center;gap:10px}.cr-score.mine{background:#eff8e1;border-color:#bdd79f}.cr-score b{font-size:30px;line-height:1}.cr-score strong{font-size:13px}.cr-score small{display:block;color:var(--cr-muted);font-size:10px;line-height:1.4}.cr-score.forfeited{opacity:.55}.cr-table{background:#183b43;border:1px solid #234951;border-radius:24px;padding:22px 44px 38px;position:relative;min-height:490px;box-shadow:inset 0 0 0 7px #21444b;background-image:radial-gradient(ellipse at 50% 0,#2c5555,transparent 70%)}.cr-table-top{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:4px 0 24px;color:#dcebd6}.cr-table-top .cr-tag{background:#ffffff10;color:#dcebd6}.cr-timer{font-size:35px;font-weight:750;font-variant-numeric:tabular-nums;letter-spacing:-1px}.cr-timer.urgent{color:#ffc08e}.cr-deck{display:flex;align-items:center;gap:12px}.cr-deck strong{font-size:21px;display:block;line-height:1.2}.cr-deck small{font-size:10px;color:#adc3bf}.cr-deck-icon{font-size:23px;border:1px solid #a4bdb7;box-shadow:3px 2px 0 #30575c,4px 3px 0 #8ca8a0;border-radius:4px;width:28px;height:36px;display:grid;place-items:center}.cr-question{max-width:760px;margin:auto;background:#fffef9;border-radius:16px;padding:28px 32px 18px;box-shadow:0 12px 30px #061a2328}.cr-question-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px}.cr-question-heading .cr-eyebrow{letter-spacing:1px;font-size:10px}.cr-question-text{font-size:19px;line-height:1.65;white-space:pre-wrap;min-height:85px;margin-bottom:24px;overflow-wrap:anywhere}.cr-answers{display:grid;grid-template-columns:1fr 1fr;gap:11px}.cr-answer{display:flex;align-items:flex-start;gap:12px;border:1px solid #dce2d7;border-radius:10px;padding:16px;background:white;text-align:left;min-height:65px;transition:border-color .15s,background .15s}.cr-answer:hover:not(:disabled){border-color:#6d9b4a;background:#f1f9e5}.cr-answer .cr-option-label{background:#eef2e9;border-radius:6px;padding:3px 7px;font-size:11px;font-weight:800;flex-shrink:0}.cr-answer .cr-option-text{font-size:15px;white-space:pre-wrap;overflow-wrap:anywhere}.cr-answer:nth-child(5){grid-column:1/-1}.cr-question-footer{border-top:1px solid #e6e8e0;margin-top:23px;padding-top:14px;display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:11px;color:var(--cr-muted)}.cr-question-footer .cr-text-link{font-size:11px}.cr-overlay{position:absolute;inset:100px 44px 38px;background:#f9fbf4f5;backdrop-filter:blur(7px);border-radius:16px;z-index:2;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;padding:24px}.cr-overlay>span{font-size:56px;font-weight:800;color:#406a44}.cr-overlay h2{font-size:28px;letter-spacing:-1px;margin:10px}.cr-overlay p{font-size:14px;color:var(--cr-muted);max-width:400px}.cr-bottom-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:18px 0}.cr-reactions{display:flex;gap:7px;flex-wrap:wrap}.cr-reactions button{background:white;border:1px solid var(--cr-line);border-radius:22px;padding:7px 11px;font-size:11px}.cr-reaction-toast{text-align:center;color:#527354;min-height:24px;font-size:13px}.cr-result-hero{text-align:center;padding:30px 20px}.cr-result-hero h2{font-size:44px;letter-spacing:-2px;margin:10px 0}.cr-result-hero p{color:var(--cr-muted)}.cr-result-actions{display:flex;justify-content:center;gap:15px;margin:30px 0 50px}.cr-review-list{display:grid;gap:12px}.cr-review-list details{background:white;border:1px solid var(--cr-line);border-radius:13px;padding:20px}.cr-review-list summary{font-weight:650;cursor:pointer;font-size:14px}.cr-review-content{padding:18px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}.cr-review-content p{line-height:1.7}.cr-review-content .cr-correct{background:#eff7e5;border-radius:8px;padding:10px}.cr-board-hero{padding:55px 0 32px}.cr-board-hero p{color:var(--cr-muted);max-width:600px}.cr-board-filters{display:flex;align-items:end;gap:18px}.cr-board-filters label{flex:1}.cr-board-table{border-collapse:collapse;width:100%;margin:20px 0;font-size:14px}.cr-board-table th{text-align:left;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--cr-muted)}.cr-board-table th,.cr-board-table td{padding:16px 10px;border-bottom:1px solid #e9ede4}.cr-board-table td:first-child{font-size:18px;font-weight:800;width:55px}.cr-challenge{margin-top:30px;background:#edf6df;border-radius:14px;padding:24px;display:flex;align-items:center;justify-content:space-between;gap:20px}.cr-challenge h2{font-size:19px}.cr-challenge p{font-size:12px}.cr-empty{padding:35px;text-align:center;color:var(--cr-muted);border:1px dashed #d3ddd0;border-radius:13px;grid-column:1/-1}.cr-unavailable{padding:100px 0}.cr-unavailable h1{font-size:45px;letter-spacing:-2px}.cr-admin{margin-top:40px}.cr-admin summary{cursor:pointer;font-weight:700;margin-bottom:15px}.cr-admin pre{overflow:auto;font-size:12px;max-height:350px}.cr-admin form{display:flex;align-items:end;gap:12px}.puk-question-diagram{max-height:360px;object-fit:contain}.katex-display{overflow:auto;padding:3px 0}#queue-status p{font-size:12px}.cr-unavailable p{color:var(--cr-muted);max-width:500px}
@media(max-width:1000px){.cr-header{gap:18px}.cr-product{padding-left:18px}.cr-header nav{gap:16px}.cr-hero{grid-template-columns:1.1fr .9fr;gap:20px}.cr-orbit{width:300px;height:300px}.cr-demo-card{width:205px;height:285px}.cr-demo-front{padding:20px}.cr-floating-badge{right:-8px;font-size:10px}.cr-profile{align-items:flex-start;flex-direction:column}.cr-profile form{width:100%}.cr-profile label{flex:1}.cr-profile select{max-width:none}.cr-room-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){.cr-header{height:70px;padding:0 18px;gap:14px}.cr-brand{font-size:19px}.cr-brand-icon{font-size:26px}.cr-product{font-size:9px;letter-spacing:1px;padding-left:12px}.cr-product .cr-live-dot{display:none}.cr-header nav{gap:12px;font-size:11px}.cr-header nav>a:first-child{display:none}.cr-icon-button{font-size:10px;padding:5px 8px}.cr-main{padding:0 18px 40px}.cr-hero{display:block;padding:40px 0 30px;min-height:0}.cr-hero h1{font-size:47px;letter-spacing:-2px}.cr-hero p{font-size:15px}.cr-hero-art{display:none}.cr-hero-actions{gap:18px}.cr-facts{font-size:10px;gap:12px;flex-wrap:wrap}.cr-panel{padding:22px;border-radius:16px}.cr-profile form{flex-wrap:wrap}.cr-profile label{min-width:calc(50% - 10px)}.cr-profile form .cr-button{width:100%;margin-top:4px}.cr-play-grid,.cr-lobby-grid{grid-template-columns:1fr}.cr-room-grid{grid-template-columns:1fr}.cr-room-heading{margin:28px 0 20px}.cr-room-heading h1{font-size:27px}.cr-room-heading .cr-button{padding:9px 12px;font-size:12px}.cr-invite img{width:130px;height:130px}.cr-scoreboard{display:flex;overflow-x:auto;gap:8px;margin-bottom:14px;padding-bottom:5px}.cr-score{min-width:135px;flex:1;padding:11px 12px}.cr-score b{font-size:25px}.cr-score strong{font-size:11px}.cr-score small{font-size:9px}.cr-table{padding:17px 13px 20px;border-radius:18px;min-height:460px;box-shadow:inset 0 0 0 4px #21444b}.cr-table-top{gap:8px;padding:0 4px 19px}.cr-table-top .cr-tag{font-size:8px;padding:5px 7px;letter-spacing:.5px}.cr-timer{font-size:28px}.cr-deck{gap:8px}.cr-deck strong{font-size:17px}.cr-deck small{font-size:8px}.cr-deck-icon{width:22px;height:30px;font-size:18px}.cr-question{padding:20px 17px 14px;border-radius:12px}.cr-question-heading{margin-bottom:17px}.cr-question-heading .cr-tag{font-size:8px;padding:5px 7px}.cr-question-text{font-size:17px;min-height:65px}.cr-answers{grid-template-columns:1fr;gap:9px}.cr-answer{min-height:55px;padding:13px}.cr-answer:nth-child(5){grid-column:auto}.cr-answer .cr-option-text{font-size:14px}.cr-question-footer{align-items:flex-start;font-size:10px;gap:10px}.cr-question-footer .cr-text-link{font-size:10px;white-space:nowrap}.cr-overlay{inset:75px 13px 20px}.cr-overlay h2{font-size:23px}.cr-bottom-bar{align-items:flex-start;flex-direction:column}.cr-reactions{gap:5px}.cr-reactions button{font-size:10px}.cr-footer{padding:20px 18px;font-size:10px;gap:20px}.cr-board-hero{padding:35px 0 22px}.cr-board-hero h1{font-size:42px;letter-spacing:-2px}.cr-board-filters{flex-wrap:wrap;gap:12px}.cr-board-filters label{min-width:100%}.cr-board-table{font-size:12px}.cr-board-table th,.cr-board-table td{padding:12px 5px;font-size:11px}.cr-challenge{display:block;padding:18px}.cr-challenge .cr-button{width:100%;margin-top:12px}.cr-result-hero h2{font-size:35px}.cr-result-actions{gap:10px}.cr-result-actions .cr-button{font-size:12px;padding:11px 15px}.cr-notice{top:80px;width:90vw}.cr-reactions button{min-height:34px}.cr-admin form{flex-wrap:wrap}.cr-empty{padding:25px 15px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
.cr-product img{display:block;width:160px;height:54px;object-fit:contain}.cr-hero-logo{display:block;width:min(100%,480px);height:auto;margin:22px 0 10px}.cr-hero h1{font-size:clamp(38px,4vw,56px);letter-spacing:-2px;margin-top:18px}.cr-guide{margin-top:42px}.cr-guide>p{max-width:1000px;color:var(--cr-muted)}.cr-guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}.cr-guide h3{font-size:18px;margin:16px 0 8px}.cr-guide details{border-top:1px solid var(--cr-line);padding:17px 0}.cr-guide summary{cursor:pointer;font-weight:700}.cr-guide details p{max-width:900px;color:var(--cr-muted)}.cr-guide-links{display:flex;flex-wrap:wrap;gap:16px 24px;font-weight:650;font-size:13px}@media(max-width:700px){.cr-product img{width:102px;height:38px}.cr-product{padding-left:10px}.cr-header{gap:10px}.cr-header nav{gap:8px}.cr-hero-logo{width:100%;max-width:380px;margin-top:20px}.cr-hero h1{font-size:39px}.cr-guide-grid{grid-template-columns:1fr;gap:0}.cr-guide{margin-top:28px}}


/* PUK Up uses the original PhysicsUK brand asset and a separate game title. */
.cr-hero .cr-game-title{font-size:clamp(76px,8vw,112px);font-weight:900;letter-spacing:-6px;line-height:1;margin:24px 0 18px}.cr-game-title span{color:#19bf70}.cr-hero .cr-hero-tagline{font-size:clamp(26px,3vw,35px);line-height:1.2;font-weight:750;letter-spacing:-1px;color:var(--cr-ink);margin:0 0 22px}.cr-hero{min-height:500px}
@media(max-width:700px){.cr-header{height:auto;min-height:74px;flex-wrap:wrap;padding:10px 18px;gap:8px 14px}.cr-header>.cr-brand{display:flex}.cr-brand img{width:132px}.cr-product{font-size:24px;letter-spacing:-1px;padding-left:14px}.cr-header nav{width:100%;justify-content:flex-end;gap:18px;padding:0 0 4px;font-size:12px}.cr-header nav>a:first-child{display:inline}.cr-icon-button{font-size:11px}.cr-hero .cr-game-title{font-size:76px;letter-spacing:-4px}.cr-hero .cr-hero-tagline{font-size:28px}.cr-notice{top:112px}}