:root{color-scheme:light;--bg:#eef2fa;--ink:#27334c;--muted:#53647d;--accent:#5468c7;--on:#fff;--glass:#ffffffba;--paper:#fff;--line:#dce4ef;--soft:#e8edf9;--green:#28664e;--warn:#8b591d;--shadow:0 12px 42px #3545670b;font-family:ui-rounded,"SF Pro Rounded",system-ui,-apple-system,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:radial-gradient(ellipse at 7% 0%,#cbd9f780,transparent 50%),radial-gradient(ellipse at 100% 90%,#d6eee380,transparent 60%),var(--bg);min-height:100dvh;font-size:16px;line-height:1.5}button,input,select{font:inherit}button,.button{cursor:pointer;color:var(--ink);background:var(--glass);border:1px solid transparent;border-radius:12px;min-height:44px;padding:9px 15px;font-weight:600;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:7px}button:hover,.button:hover{background:#fff}button:disabled{opacity:.55;cursor:wait}button.primary,.button.primary{background:var(--accent);color:var(--on)}button.primary:hover{background:#4357b3}button.selected,button[aria-pressed=true]{background:var(--paper);box-shadow:var(--shadow);color:var(--accent)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #7790e8;outline-offset:3px}input,select{width:100%;max-width:100%;border:1px solid var(--line);border-radius:12px;padding:10px 12px;min-height:44px;background:var(--paper);color:var(--ink)}input[type=checkbox]{width:19px;height:19px;min-height:0;accent-color:var(--accent);padding:0;flex-shrink:0}label{display:grid;gap:5px;color:var(--muted);font-size:14px}h1{font-size:clamp(26px,3vw,36px);line-height:1.15;font-weight:700;letter-spacing:-.04em;margin:0 0 7px}h2{font-size:20px;line-height:1.3;margin:0 0 12px}p{color:var(--muted);margin:8px 0 18px}.shell{width:min(1500px,100%);padding:20px 30px 24px;margin:auto}.top{display:flex;align-items:center;flex-wrap:wrap;gap:16px;margin-bottom:20px}.brand{display:flex;align-items:center;gap:8px;font-size:21px;font-weight:700;color:inherit;text-decoration:none;margin-right:15px}.brand img{width:48px;height:48px;object-fit:contain}.top nav{display:flex;gap:4px;padding:4px;background:var(--glass);border-radius:17px;backdrop-filter:blur(20px);flex-wrap:wrap}.top nav button{background:transparent}.top nav button.selected{background:var(--paper)}.tools{display:flex;align-items:center;gap:5px;margin-left:auto;flex-wrap:wrap}.tools button{font-size:14px}.heading{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:18px 0}.controls{display:flex;align-items:end;gap:9px;flex-wrap:wrap}.controls select{width:auto;max-width:240px}.controls label{display:grid;gap:4px}.muted{color:var(--muted);font-size:14px}.glass{background:var(--glass);backdrop-filter:blur(20px);border:1px solid #ffffffcf;border-radius:24px;padding:24px;box-shadow:var(--shadow)}.compact{padding:18px;margin-top:18px}.class-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:18px}.class-layout.with-detail{grid-template-columns:minmax(0,1fr) 320px;align-items:start}.pupil-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:9px}.pupil-tile{display:flex;align-items:start;flex-direction:column;text-align:left;background:var(--glass);padding:13px 15px;gap:3px;border-radius:18px;min-height:102px;border:1px solid #ffffffc9;backdrop-filter:blur(15px);min-width:0}.pupil-tile strong{font-size:16px;overflow-wrap:anywhere}.pupil-tile .number{color:var(--accent);font-size:14px;font-weight:700}.pupil-tile .state{font-size:14px;font-weight:400;color:var(--muted)}.pupil-tile .state.done{color:var(--green)}.pupil-tile.active{border-color:var(--accent);background:#f8faff}.pupil-tile small{color:var(--muted);font-size:13px}.warning{padding:12px 16px;border-radius:14px;background:#fff5df;color:var(--warn);margin:12px 0}.warning button{background:transparent;color:inherit;text-decoration:underline;min-height:34px;padding:3px 8px}.message:empty,.form-error:empty{display:none}.message{margin-bottom:12px;color:var(--warn);padding:12px;background:var(--paper);border-radius:14px;overflow-wrap:anywhere}.form-error{color:#a03434;margin:12px 0;font-size:15px}.exercise-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.exercise-card{padding:20px;min-width:0}.exercise-card h2{overflow-wrap:anywhere}.exercise-card .controls{margin-top:16px}.exercise-card .controls button{padding:8px 11px;font-size:14px}.workshop-links{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.workshop-links h2{margin:0 12px 0 0}.help summary{cursor:pointer}.help p{max-width:950px;font-size:14px}.login{max-width:430px;margin:70px auto}.login form{display:grid;gap:18px}.login p{margin-bottom:26px}.history-entry{padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}.history-entry strong{display:block}.history-entry .muted{font-size:13px}.detail-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.detail-top h2{margin:0}footer{color:var(--muted);font-size:13px;margin-top:24px}dialog{background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:24px;padding:24px;width:min(660px,calc(100% - 24px));max-height:calc(100dvh - 36px);box-shadow:0 28px 100px #27334c35}dialog::backdrop{background:#24334d48;backdrop-filter:blur(5px)}dialog form{display:grid;gap:16px}dialog .heading{margin:0 0 8px}dialog .heading h2{margin:0}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}fieldset{border:0;padding:0;margin:0}legend{color:var(--muted);font-size:14px;margin-bottom:8px}.check-row{display:flex;gap:10px;flex-wrap:wrap}.check-row label,.check-grid label{display:flex;gap:8px;align-items:center;min-height:44px;color:var(--ink)}.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 18px}.roster-edit{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px}.roster-line{display:grid;grid-template-columns:60px minmax(0,1fr);gap:6px}.roster-line input{min-width:0}.qr-wrap{display:flex;justify-content:center;padding:18px}.qr-wrap img{max-width:100%}.student .shell{max-width:1050px}.student .top{justify-content:space-between}.student .brand{margin-right:auto}.student-exercises{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.student-card{padding:26px}.student-card h2{font-size:24px}.student-card button{margin-top:20px;width:100%}.game{max-width:920px;margin:30px auto;text-align:center;min-height:430px}.game .heading{margin:0 0 30px}.game h2{color:var(--muted);font-size:18px;font-weight:500}.equation{font-size:clamp(40px,8vw,94px);font-weight:750;letter-spacing:-.02em;margin:25px 0;white-space:nowrap}.answer-controls{display:flex;gap:12px;justify-content:center;align-items:center;margin-top:8px}.answer-controls input{width:115px;font-size:28px;text-align:center}.answer-controls button{min-height:63px}.feedback{font-size:22px;color:var(--green);min-height:38px;margin-top:20px}.feedback.wrong{color:var(--muted)}.finish{max-width:560px;margin:70px auto;text-align:center;padding:40px}.finish p{font-size:22px}.print-ticket{border:1px dashed #aaa;text-align:center;padding:8px;break-inside:avoid}.print-ticket strong{display:block;margin-bottom:5px}.print-ticket .qr{display:flex;justify-content:center}.print-ticket img{width:88px;height:88px}.projection .private-name{display:none!important}.projection #pupil-detail{display:none!important}body.projection .class-layout{grid-template-columns:1fr}.projection .pupil-tile{min-height:88px}.projection [data-panel=access],.projection [data-panel=groups]{display:none!important}.projection .tools #logout{display:none}
@media(min-width:1350px){.class-layout.with-detail .pupil-grid{grid-template-columns:repeat(5,minmax(0,1fr))}}@media(max-width:1150px){.pupil-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.class-layout.with-detail{grid-template-columns:1fr}.exercise-list{grid-template-columns:repeat(2,minmax(0,1fr))}.tools{margin-left:0}}@media(max-width:700px){.shell{padding:14px}.top{gap:10px}.brand img{width:40px;height:40px}.top nav{width:100%;gap:2px}.top nav button{padding:8px 10px;font-size:14px}.tools{gap:4px}.heading{align-items:start}.controls{gap:7px}.controls select{max-width:175px}.pupil-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.pupil-tile{padding:10px;min-height:95px}.pupil-tile strong{font-size:15px}.exercise-list,.student-exercises{grid-template-columns:1fr}.glass{padding:18px;border-radius:20px}.roster-edit{grid-template-columns:1fr}.login{margin:35px auto}.game{margin:12px auto;padding:16px}.game .heading{gap:8px;font-size:14px}.game .heading button{padding:8px}.form-grid,.check-grid{grid-template-columns:1fr}.check-row{flex-direction:column}.equation{font-size:clamp(37px,10vw,64px)}dialog{padding:18px}.student-card{padding:24px}.student-card button{margin-top:14px}}@media(max-width:380px){.pupil-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media print{@page{size:A4;margin:10mm}body{background:white;color:black;font:12px Arial}.shell,dialog{display:none!important}#print-sheet{display:grid!important;grid-template-columns:repeat(4,1fr);gap:3mm}.print-ticket{height:40mm;display:flex;flex-direction:column;justify-content:center}#print-sheet img{width:25mm;height:25mm}#print-sheet canvas{width:25mm!important;height:25mm!important}}
@media(prefers-reduced-motion:no-preference){button,.button{transition:background .15s,border-color .15s}}
.print-url{font:11px/1.25 Arial,sans-serif;margin-top:5px;overflow-wrap:anywhere}body.projection nav [data-tab=groups],body.projection nav [data-tab=access]{display:none}