:root{--blue:#0b3994;--navy:#172554;--yellow:#f6b511;--ink:#17223d;--muted:#657089;--border:#dce2ed;--paper:#f2f5fa;--green:#167047;--red:#ac2635;--radius:18px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif}a{color:var(--blue);text-underline-offset:4px}button,input,textarea,select{font:inherit}button,.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:11px 17px;background:var(--blue);color:#fff;font-weight:700;text-decoration:none;cursor:pointer;min-height:46px;line-height:1.35}button:hover,.button:hover{filter:brightness(.94)}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}.secondary{background:#edf2fb;color:var(--blue);border-color:#ccd8ed}.yellow{background:var(--yellow);color:var(--navy)}.danger{background:#fff0f0;color:var(--red);border-color:#efc1c6}.link{background:transparent;color:var(--blue);padding:6px;min-height:32px}.topbar{background:var(--navy);border-bottom:4px solid var(--yellow);color:#fff;padding:18px max(24px,calc((100vw - 1320px)/2));display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:18px;text-decoration:none;color:#fff;font-size:12px;letter-spacing:1px}.brand img{width:110px;max-height:65px;object-fit:contain;background:#fff;border-radius:7px;padding:5px}.brand strong{display:block;font-size:23px;letter-spacing:-.5px}.brand em{font-style:normal;color:var(--yellow)}.landing{color:#fff;font-size:14px}.nav{display:flex;gap:28px;align-items:center;max-width:1320px;margin:auto;padding:16px 24px;border-bottom:1px solid var(--border);flex-wrap:wrap}.nav a{font-size:14px;font-weight:650;text-decoration:none}.nav form{margin-left:auto}.nav button{font-size:14px}main{max-width:1320px;padding:34px 24px;margin:auto;min-height:72vh}footer{text-align:center;color:var(--muted);font-size:12px;padding:28px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,3.5vw,43px);line-height:1.14;letter-spacing:-1.3px;margin-bottom:20px}h2{font-size:23px;letter-spacing:-.5px}h3{font-size:17px;margin-top:22px}.eyebrow{display:block;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:2px;margin-bottom:13px}.hero{background:var(--navy);color:white;padding:64px;border-radius:24px;margin-bottom:26px;overflow:hidden;border-bottom:8px solid var(--yellow)}.hero h1{font-size:clamp(38px,5.8vw,72px);max-width:850px;letter-spacing:-2px}.hero p{max-width:580px;font-size:19px;color:#d5def2}.hero .eyebrow{color:var(--yellow)}.grid{display:grid;gap:24px}.two{grid-template-columns:repeat(2,minmax(0,1fr))}.control-grid{grid-template-columns:minmax(0,1.2fr) minmax(340px,1fr)}.bank-grid{grid-template-columns:minmax(280px,.8fr) minmax(0,1.5fr);align-items:start}.compact{gap:12px}.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px;margin-bottom:24px;box-shadow:0 5px 20px #17255404}.grid>.card{margin-bottom:0}.grid+.card{margin-top:24px}.narrow{max-width:510px;margin:35px auto}.section-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px;flex-wrap:wrap}.section-head h1,.section-head h2{margin-bottom:0}.section-head label{margin:0}.actions{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.pill{display:inline-block;font-size:11px;font-weight:850;letter-spacing:1.3px;padding:5px 10px;border-radius:6px;background:#e8eefb;color:var(--blue);margin-bottom:12px}.pill.red{background:#ffe9e9;color:var(--red)}label{display:block;font-size:14px;font-weight:650;margin-bottom:17px}input,select,textarea{width:100%;display:block;margin-top:6px;padding:11px 12px;border:1px solid #bac5d8;border-radius:9px;background:white;color:var(--ink)}textarea{resize:vertical}input[type=checkbox],input[type=radio]{width:20px;height:20px;margin:0;accent-color:var(--blue);flex-shrink:0}.inline{display:flex;align-items:center;gap:9px}.muted{color:var(--muted);font-size:14px}.notice{position:sticky;top:12px;z-index:10;padding:13px 18px;border:1px solid #c8d7f4;background:#eaf1ff;border-radius:10px;margin-bottom:18px}.notice.error,.error{color:#9e2034;background:#fff0f1}.notice.success,.success{color:var(--green)}[hidden]{display:none!important}.stack{display:grid;gap:12px}.list-row{padding:14px;border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:space-between;gap:12px}.list-row p{margin:0}.list-row .actions{margin:0;flex-shrink:0}.list-row button{font-size:13px;padding:8px 11px;min-height:36px}.question-list{padding-left:23px}.question-list li{padding:10px 0;border-bottom:1px solid var(--border)}.question-list .actions{margin:5px 0}.question-list button{font-size:12px;padding:5px 8px;min-height:28px}.question-list .question-edit{font-size:14px;text-align:left;justify-content:flex-start}.question-list .selected{font-weight:800;color:var(--blue)}details{margin:18px 0}summary{cursor:pointer;font-weight:650;font-size:14px}details>div{margin-top:15px}fieldset{border:1px solid var(--border);border-radius:10px;padding:14px;margin:15px 0}legend{font-size:14px;font-weight:700}.option-row{display:flex;align-items:center;gap:12px;margin-bottom:12px}.option-row input[type=text]{margin:0}.option-row label{margin:0;display:flex;align-items:center;gap:8px}.question-text{font-size:26px;line-height:1.4;white-space:pre-wrap;overflow-wrap:anywhere}.options{display:grid;gap:10px;grid-template-columns:repeat(2,minmax(0,1fr));margin:22px 0}.option{padding:15px;background:#edf2fb;border:2px solid transparent;border-radius:10px;display:flex;gap:13px;align-items:center;overflow-wrap:anywhere}.option.correct{border-color:var(--green);background:#e7f5ed}.option b{display:flex;align-items:center;justify-content:center;width:33px;height:33px;background:var(--blue);color:#fff;border-radius:7px;flex-shrink:0}.answer-box{padding:14px;background:#f2f5fb;border-radius:10px;white-space:pre-wrap;overflow-wrap:anywhere}.team-row{border-bottom:1px solid var(--border);padding:15px 0}.team-row-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.team-row .actions{margin:10px 0 0}.team-row button{padding:7px 10px;min-height:33px;font-size:12px}.score{font-size:30px;font-weight:850;color:var(--blue);font-variant-numeric:tabular-nums}.code{font-size:24px;font-weight:850;letter-spacing:5px}.stage{border-radius:20px;background:var(--navy);color:#fff;padding:38px;margin-bottom:24px;min-height:330px}.stage .question-text{font-size:clamp(28px,3.5vw,54px);font-weight:750;line-height:1.25}.stage .pill{background:#ffffff20;color:var(--yellow)}.stage .option{background:#ffffff0c;font-size:clamp(20px,2.1vw,32px)}.stage .option.correct{background:#184d41;border-color:#5fe0a7}.stage .answer-box{background:#ffffff12}.stage .muted{color:#c3cce2}.score-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}.score-card{background:#f3f6fc;border-radius:12px;padding:16px;border:2px solid transparent}.score-card h3{margin:0 0 8px;overflow-wrap:anywhere}.score-card.good{border-color:var(--green)}.score-card.bad{border-color:var(--red)}.score-card.winner{background:#fff4d6;border-color:var(--yellow)}.clack{padding:20px;text-align:center;border:2px solid var(--yellow);border-radius:14px;margin:20px 0;color:var(--yellow);font-size:clamp(24px,3vw,45px);font-weight:850;animation:pop .25s ease-out}.mobile-stage{max-width:600px;margin:auto;text-align:center}.mobile-stage h1{font-size:28px;overflow-wrap:anywhere}.mobile-stage .section-head{text-align:left}.buzzer{display:flex;align-items:center;justify-content:center;margin:30px auto;width:min(76vw,300px);height:min(76vw,300px);border-radius:50%;border:14px solid #aeb8c8;background:radial-gradient(circle at 40% 28%,#ff6771,#d6283e 50%,#99162c);box-shadow:0 12px 0 #647086,0 22px 32px #17255430,inset 0 -12px 0 #780d24;color:white;font-size:33px;letter-spacing:1px;text-shadow:0 2px 2px #600;font-weight:900;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.buzzer:active:not(:disabled){transform:translateY(8px);box-shadow:0 4px 0 #647086,0 10px 18px #17255430,inset 0 -4px 0 #780d24}.buzzer:disabled{opacity:1;background:radial-gradient(circle at 40% 28%,#a3aab6,#59657a);box-shadow:0 8px 0 #647086,inset 0 -8px 0 #414c60;font-size:25px}.buzzer.first{background:radial-gradient(circle at 40% 28%,#48d498,#157744);color:white}.mobile-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:24px 0}.mobile-options button{min-height:100px;font-size:40px}.mobile-options button.chosen{outline:4px solid var(--yellow);opacity:1}.big-status{font-size:24px;font-weight:800}.history-table{width:100%;border-collapse:collapse;min-width:500px}.history-table th,.history-table td{text-align:left;padding:10px;border-bottom:1px solid var(--border)}.table-wrap{overflow:auto}.prewrap{white-space:pre-wrap;overflow-wrap:anywhere}.empty{padding:24px;color:var(--muted);background:#f5f7fb;border-radius:12px}.warning{color:#855000;background:#fff6dd;padding:12px;border-radius:10px}.bank-grid+.card{margin-top:24px}#saved{color:var(--green);font-weight:700}body[data-page=projector] main{max-width:1600px}body[data-page=projector] .topbar{padding:12px 24px}body[data-page=projector] .brand img{width:85px}body[data-page=projector] .score-card{font-size:20px}@keyframes pop{from{transform:scale(.95)}to{transform:scale(1)}}@media(max-width:850px){.bank-grid,.control-grid{grid-template-columns:1fr}.hero{padding:35px}.list-row{flex-wrap:wrap}.nav{gap:16px}.topbar{padding:14px 20px}.brand img{width:80px}.brand strong{font-size:20px}.landing{font-size:12px}}@media(max-width:580px){main{padding:24px 15px}.two{grid-template-columns:1fr}.compact.two{grid-template-columns:1fr 1fr}.card{padding:20px}.hero{padding:28px}.topbar{gap:10px}.brand{gap:10px}.brand img{width:64px}.brand span{font-size:10px}.brand strong{font-size:17px}.landing{max-width:100px;text-align:right}.section-head{gap:12px}.actions button,.actions .button{flex-grow:1}.options{grid-template-columns:1fr}.stage{padding:23px}.nav{padding:12px 15px;gap:12px}.nav a{font-size:12px}.score-grid{grid-template-columns:1fr 1fr}.score-card{padding:12px}.question-text{font-size:23px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* Entrada al joc amb el QR aportat pel centre. */
.lobby-entry{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:40px;align-items:center}
.lobby-entry h2{font-size:clamp(28px,3.4vw,48px);line-height:1.2}
.lobby-instructions{font-size:clamp(20px,2vw,28px);max-width:750px}
.lobby-url{display:block;color:#fff;font-size:clamp(17px,1.8vw,26px);overflow-wrap:anywhere}
.lobby-qr{margin:0;padding:28px;background:#fff;border-radius:16px;color:var(--navy);text-align:center}
.lobby-qr img{display:block;width:350px;max-width:100%;height:auto}
.lobby-qr figcaption{font-size:17px;font-weight:750;margin-top:16px}
@media(max-width:850px){.lobby-entry{grid-template-columns:1fr;gap:24px}.lobby-qr{justify-self:center;max-width:100%}}

/* Importació de preguntes generades amb IA. */
.import-panel{border:2px solid #b9cbed;scroll-margin-top:20px}
.import-panel h3{margin-top:12px}
.import-question{padding:20px;border:1px solid var(--border);border-radius:12px}
.import-question>.inline{align-items:flex-start;font-size:18px;white-space:pre-wrap;overflow-wrap:anywhere}
.import-question>.inline input{margin-top:5px}
.import-options{padding-left:30px;white-space:pre-wrap;overflow-wrap:anywhere}
.import-options li{padding:5px 8px}
.import-correct{color:var(--green);background:#e7f5ed;font-weight:700;border-radius:6px}
#import-status:not(:empty){padding:14px;border-radius:10px;background:#f2f5fa;margin:20px 0}
#import-status.error{background:#fff0f1}
#import-questions{max-height:65vh;overflow:auto;padding:2px;overscroll-behavior:contain}
#import-prompt{font-size:13px}

/* Comandament del professor a la pantalla projectada. */
.projector-controls{padding:14px 18px;margin-bottom:20px;border:1px solid var(--border);border-radius:14px;background:#fff}
.projector-controls .actions{margin:0;gap:10px}
.projector-controls #projector-scoring{margin-top:10px}
.projector-controls p{margin:10px 0 0}
.projector-nav{align-items:center}
@media(max-width:580px){.projector-controls{padding:12px}.projector-controls button{flex:1 1 42%}}