:root{color:#17213b;background:#f7f8fc;font-family:Segoe UI,Microsoft YaHei,system-ui,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;--ink: #17213b;--muted: #68738c;--line: #e4e8f2;--blue: #3157d5;--blue-dark: #2443ac;--surface: #ffffff;--soft: #f2f4fa;--radius: 22px;--shadow: 0 18px 48px rgba(41, 56, 99, .09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(49,87,213,.28);outline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-shell,.play-shell{min-height:100vh}.page-loading{min-height:100vh;display:grid;place-items:center;color:var(--blue);font-weight:800}.app-header{height:76px;max-width:1240px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}.brand{display:inline-flex;align-items:center;gap:11px}.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:13px;color:#fff;background:linear-gradient(135deg,#3157d5,#7a54e8);box-shadow:0 10px 24px #3157d53b}.brand>span:last-child{display:grid;gap:1px}.brand strong{font-size:16px;letter-spacing:.02em}.brand small{color:var(--muted);font-size:9px;letter-spacing:.12em;text-transform:uppercase}.app-header nav{display:flex;align-items:center;gap:12px}.app-header nav>a{display:inline-flex;align-items:center;gap:7px;color:#52607a;font-weight:600;font-size:14px}.icon-button{width:42px;min-width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:12px;display:inline-grid;place-items:center;cursor:pointer}.icon-button:hover{background:#f4f6fb}.icon-button.danger{color:#c73e51}.hero{max-width:1192px;min-height:470px;margin:10px auto 0;padding:64px 74px;border-radius:32px;color:#fff;background:radial-gradient(circle at 85% 18%,rgba(255,255,255,.2),transparent 20%),radial-gradient(circle at 75% 80%,rgba(255,182,122,.24),transparent 29%),linear-gradient(125deg,#20357f,#3157d5 48%,#6b4bd1);display:grid;grid-template-columns:1.15fr .85fr;gap:48px;overflow:hidden;position:relative}.hero:before{content:"";position:absolute;width:220px;height:220px;border:1px solid rgba(255,255,255,.14);border-radius:50%;left:-100px;bottom:-120px}.hero-copy{align-self:center;position:relative;z-index:1}.hero-kicker{width:max-content;display:flex;align-items:center;gap:7px;border:1px solid rgba(255,255,255,.22);background:#ffffff1a;padding:8px 12px;border-radius:99px;font-size:13px;font-weight:700}.hero h1{margin:20px 0 18px;font-size:clamp(42px,5vw,66px);line-height:1.08;letter-spacing:-.055em}.hero h1 em{font-style:normal;color:#ffd18f}.hero-copy>p{max-width:590px;margin:0;color:#ffffffc7;font-size:17px;line-height:1.8}.hero-points{display:flex;flex-wrap:wrap;gap:18px;margin-top:30px}.hero-points span{display:flex;align-items:center;gap:6px;font-size:13px;color:#ffffffe6}.hero-points svg{color:#baf3d4}.hero-visual{position:relative;min-height:330px;display:grid;place-items:center}.hero-core{width:154px;height:154px;border-radius:50%;display:grid;place-content:center;text-align:center;background:#ffffff29;border:1px solid rgba(255,255,255,.35);box-shadow:inset 0 0 50px #ffffff1a,0 28px 80px #0c154b4d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:2}.hero-core strong{font-size:54px;line-height:.95}.hero-core span{font-size:12px;margin-top:6px;letter-spacing:.1em}.orbit{position:absolute;top:50%;right:50%;bottom:50%;left:50%;border:1px solid rgba(255,255,255,.19);border-radius:50%;transform:translate(-50%,-50%)}.orbit-one{width:282px;height:282px;animation:orbit 24s linear infinite}.orbit-two{width:370px;height:230px;animation:orbit 32s linear reverse infinite}.orbit span{position:absolute;width:54px;height:54px;display:grid;place-items:center;background:#fff;color:#2f4ba8;border-radius:17px;font-weight:800;box-shadow:0 15px 30px #16215b40}.orbit span:nth-child(1){left:-20px;top:42%}.orbit span:nth-child(2){right:-18px;top:18%}.orbit span:nth-child(3){left:54%;bottom:-24px}@keyframes orbit{to{transform:translate(-50%,-50%) rotate(360deg)}}.catalog-section{max-width:1192px;margin:82px auto 80px;padding:0 2px}.catalog-heading{display:flex;align-items:end;justify-content:space-between;gap:20px}.eyebrow{color:var(--blue);font-size:11px;letter-spacing:.16em;font-weight:800;text-transform:uppercase;margin:0 0 8px}.catalog-heading h2,.section-heading h2{margin:0;font-size:30px;letter-spacing:-.035em}.catalog-heading>p{color:var(--muted);font-size:14px}.catalog-tools{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:28px 0}.subject-tabs{display:flex;gap:7px;padding:5px;background:#ebeef5;border-radius:14px;overflow-x:auto}.subject-tabs button{border:0;background:transparent;padding:10px 15px;min-height:42px;border-radius:10px;font-weight:700;color:#667088;cursor:pointer;white-space:nowrap}.subject-tabs button span{margin-left:5px;color:#9199aa;font-size:11px}.subject-tabs button.active{color:var(--blue);background:#fff;box-shadow:0 4px 15px #2f3d6914}.search-box{width:290px;height:48px;display:flex;align-items:center;gap:9px;padding:0 14px;border-radius:13px;background:#fff;border:1px solid var(--line);color:#8b94a7}.search-box:focus-within{border-color:#8599e9;box-shadow:0 0 0 3px #3157d514}.search-box input{min-width:0;flex:1;border:0;outline:0;color:var(--ink);background:transparent}.courseware-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.courseware-card{--accent: #3157d5;padding:22px;min-height:370px;display:flex;flex-direction:column;border:1px solid #e6e9f1;background:#fff;border-radius:20px;box-shadow:0 1px #1e2c5805;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;animation:card-in .4s both;animation-delay:var(--delay)}.courseware-card:hover{transform:translateY(-5px);border-color:color-mix(in srgb,var(--accent) 26%,white);box-shadow:var(--shadow)}@keyframes card-in{0%{opacity:0;transform:translateY(10px)}}.card-topline{display:flex;align-items:center;justify-content:space-between;gap:8px}.subject-badge,.status-badge,.source-label{width:max-content;padding:5px 9px;border-radius:99px;background:#f1f3f8;color:#606b82;font-size:10px;font-weight:800}.status-badge.available{color:#17835a;background:#e8f8f0}.status-badge.beta{color:#a76b00;background:#fff5dc}.courseware-icon{width:68px;height:68px;margin:19px 0 15px;border-radius:20px;display:grid;place-items:center;font-size:23px;font-weight:900;color:var(--accent);background:color-mix(in srgb,var(--accent) 11%,white);border:1px solid color-mix(in srgb,var(--accent) 18%,white)}.courseware-icon.large{width:94px;height:94px;margin:0;font-size:31px;flex:0 0 auto}.courseware-card h3{font-size:19px;margin:0 0 8px}.courseware-card>p{color:var(--muted);font-size:13px;line-height:1.65;margin:0;min-height:44px}.tag-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}.tag-row span{background:#f5f6fa;color:#737d90;border-radius:6px;padding:4px 7px;font-size:10px}.custom-label{display:flex;align-items:center;gap:5px;color:#17835a;font-size:11px;font-weight:700;margin:17px 0}.card-actions{display:flex;align-items:center;gap:11px;margin-top:auto;border-top:1px solid #edf0f5;padding-top:16px}.primary-button,.secondary-button,.card-link,.back-link{min-height:43px;display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:11px;border:0;padding:0 15px;font-weight:750;font-size:13px;cursor:pointer}.primary-button{color:#fff;background:var(--blue);box-shadow:0 7px 17px #3157d529}.primary-button:hover{background:var(--blue-dark)}.secondary-button{color:#45536f;background:#fff;border:1px solid var(--line)}.secondary-button:hover{background:#f7f8fb}.primary-button:disabled,.secondary-button:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}.card-actions .secondary-button{flex:0 0 auto;padding:0 12px}.card-link{color:var(--accent);background:transparent;padding:0 2px;margin-left:auto}.empty-state,.error-page{padding:60px 24px;text-align:center;border:1px dashed #ced5e5;border-radius:20px;color:var(--muted)}.empty-state h3{color:var(--ink);margin-bottom:7px}.empty-state .secondary-button{margin-top:12px}footer{max-width:1192px;margin:0 auto;padding:24px 0 34px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:#8a93a5;font-size:11px}.inner-page{background:linear-gradient(#f6f7fb,#fbfcfe)}.setup-page,.editor-page{max-width:1120px;margin:0 auto;padding:28px 24px 80px}.breadcrumb{display:flex;gap:9px;color:#7c869a;font-size:12px;margin-bottom:18px}.breadcrumb a:hover{color:var(--blue)}.setup-hero{--accent: #3157d5;min-height:240px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:28px;padding:42px;border:1px solid color-mix(in srgb,var(--accent) 14%,white);background:radial-gradient(circle at 95% 0%,color-mix(in srgb,var(--accent) 10%,white),transparent 30%),#fff;border-radius:27px;box-shadow:var(--shadow)}.setup-hero h1{font-size:38px;margin:12px 0 8px;letter-spacing:-.04em}.setup-hero p{color:var(--muted);margin:0;line-height:1.7}.setup-play{align-self:center}.content-choice{margin-top:48px}.section-heading,.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.content-set-grid{display:grid;gap:13px;margin-top:20px}.content-set-card{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:18px;padding:21px;border:1px solid var(--line);border-radius:17px;background:#fff}.content-set-card.builtin{border-color:#cad5fb;background:linear-gradient(90deg,#f8faff,#fff)}.set-icon{width:48px;height:48px;display:grid;place-items:center;color:var(--blue);border-radius:13px;background:#edf1ff}.content-set-card h3{margin:6px 0 4px;font-size:16px}.content-set-card p{margin:0;color:var(--muted);font-size:12px}.set-actions{display:flex;align-items:center;gap:8px}.editor-titlebar{display:grid;grid-template-columns:120px 1fr auto;align-items:center;margin-bottom:26px}.editor-titlebar>div{text-align:center}.editor-titlebar h1{margin:0;font-size:27px}.back-link{justify-content:flex-start;padding:0;color:#5f6b80}.editor-card{background:#fff;border:1px solid var(--line);border-radius:19px;padding:24px;margin-bottom:16px}.dataset-name{display:grid;grid-template-columns:130px minmax(220px,1fr) 1fr;align-items:center;gap:14px}.dataset-name label,.import-grid label{font-size:13px;font-weight:800}.dataset-name input,.editor-card textarea,.editor-card table input{width:100%;border:1px solid #dfe4ee;border-radius:10px;color:var(--ink);background:#fbfcfe}.dataset-name input{height:44px;padding:0 12px}.dataset-name p{color:var(--muted);font-size:11px;margin:0}.panel-heading>div{display:flex;align-items:center;gap:11px}.panel-heading h2{font-size:17px;margin:0 0 4px}.panel-heading p{margin:0;color:var(--muted);font-size:11px}.panel-heading svg{color:var(--blue)}.import-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:16px;margin-top:20px}.import-grid>div:first-child{display:grid;gap:8px}.editor-card textarea{min-height:112px;resize:vertical;padding:12px;line-height:1.5}.import-grid .secondary-button{width:max-content}.file-drop{min-height:170px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;border:1px dashed #bfc9dd;border-radius:14px;color:#657089;background:#fafbfe;cursor:pointer}.file-drop:hover{border-color:var(--blue);background:#f6f8ff}.file-drop strong{font-size:13px;color:var(--ink)}.file-drop span{font-size:10px}.file-drop input{display:none}.import-message{margin-top:13px;padding:10px 12px;border-radius:9px;background:#eef5ff;color:#3157a7;font-size:12px}.data-editor .panel-heading{margin-bottom:18px}.validation-summary{display:flex;align-items:center;gap:9px;padding:12px;margin-bottom:14px;color:#a63446;background:#fff0f2;border-radius:10px;font-size:12px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px}table{width:100%;border-collapse:collapse;font-size:12px}th{text-align:left;color:#5c677d;background:#f5f7fa;white-space:nowrap}th,td{padding:9px;border-bottom:1px solid #edf0f5}td:first-child{color:#929bad;width:38px;text-align:center}td:last-child{width:54px}.editor-card table input{min-width:120px;height:38px;padding:0 9px}.editor-card table input:focus{border-color:#8799e5;outline:0;background:#fff}.play-shell{--accent: #3157d5;background:radial-gradient(circle at 50% -20%,color-mix(in srgb,var(--accent) 12%,white),transparent 32%),#f6f8fc}.play-page{max-width:1040px;margin:0 auto;padding:16px 24px 72px}.game-header{min-height:84px;display:grid;grid-template-columns:150px 1fr 150px;align-items:center;gap:12px;margin-bottom:18px}.game-header>div{text-align:center}.game-header span{color:var(--muted);font-size:11px}.game-header h1{margin:3px 0 0;font-size:24px}.game-header>.secondary-button{justify-self:end}.engine-panel{min-height:590px;padding:27px;border:1px solid var(--line);border-radius:25px;background:#fff;box-shadow:var(--shadow)}.engine-stats{min-height:45px;padding:0 16px;display:flex;align-items:center;justify-content:center;gap:26px;border-radius:12px;background:#f4f6fa;color:#667188;font-size:12px}.engine-stats strong{color:var(--ink);font-size:14px}.engine-instruction{text-align:center;color:var(--muted);font-size:12px;margin:17px 0}.pair-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.pair-card{min-height:105px;padding:12px;position:relative;border:1px solid #e1e5ef;border-radius:15px;background:#fff;cursor:pointer;transition:transform .16s ease,border-color .16s,box-shadow .16s,opacity .25s}.pair-card:hover:not(:disabled){transform:translateY(-2px);border-color:var(--accent);box-shadow:0 10px 24px #28376417}.pair-card.left{background:linear-gradient(145deg,#fff,color-mix(in srgb,var(--accent) 5%,white))}.pair-card.right{background:#fafbfe}.pair-card.selected{border:2px solid var(--accent);background:color-mix(in srgb,var(--accent) 10%,white)}.pair-card.matched{opacity:.12;transform:scale(.9);pointer-events:none}.pair-card strong{font-size:16px;overflow-wrap:anywhere}.card-side{position:absolute;top:7px;left:8px;font-size:8px;color:#98a1b4}.question-card{text-align:center;padding:26px;margin:18px 0;border-radius:16px;background:linear-gradient(145deg,#f6f8ff,#fbf9ff)}.question-card h2{margin:0;font-size:24px}.sequence-zone{min-height:92px;padding:16px;display:flex;flex-wrap:wrap;align-content:center;justify-content:center;gap:9px;border-radius:14px}.selected-zone{border:2px dashed #cfd7ea;background:#fafbfe}.source-zone{margin-top:14px;background:#f3f5f9}.drop-hint{color:#9aa3b4;font-size:12px}.sequence-token{min-height:44px;padding:0 14px;display:inline-flex;align-items:center;gap:4px;border:1px solid #dfe4ee;border-radius:10px;background:#fff;font-weight:700;cursor:pointer}.sequence-token.placed{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 30%,white)}.feedback-line{min-height:38px;margin:12px 0;display:grid;place-items:center;color:#5c6880;font-size:12px;text-align:center}.engine-actions{display:flex;align-items:center;justify-content:center;gap:9px}.cloze-layout,.quiz-layout,.fraction-panel,.number-line-panel{text-align:center}.cloze-prompt{margin:72px auto 22px;font-size:clamp(40px,7vw,66px);font-weight:900;letter-spacing:.08em}.choice-row{display:flex;justify-content:center;gap:13px;margin:30px 0}.choice-tile{width:72px;height:72px;border:1px solid #dfe4ee;border-radius:18px;background:#fff;font-size:28px;font-weight:900;cursor:pointer}.choice-tile.selected{color:#fff;border-color:var(--accent);background:var(--accent);transform:translateY(-3px);box-shadow:0 12px 25px color-mix(in srgb,var(--accent) 24%,transparent)}.classification-source{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:20px 0}.classify-card{min-width:112px;min-height:72px;padding:10px;display:grid;place-items:center;gap:5px;border:1px solid #dfe4ee;border-radius:13px;background:#fff;cursor:grab}.classify-card.selected{border:2px solid var(--accent);background:color-mix(in srgb,var(--accent) 7%,white)}.assignment-badge{padding:3px 6px;border-radius:99px;color:#1c7758;background:#e7f7f0;font-size:9px}.shape-svg{width:64px;height:54px}.shape-svg polygon,.shape-svg circle{fill:color-mix(in srgb,var(--accent) 16%,white);stroke:var(--accent);stroke-width:5;stroke-linejoin:round}.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:20px 0}.category-zone{min-height:105px;display:grid;place-content:center;gap:6px;border:2px dashed #cdd5e5;border-radius:15px;color:#506079;background:#fafbfe;cursor:pointer}.category-zone:hover{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 5%,white)}.category-zone span{font-size:10px;color:#929bad}.quiz-question{min-height:255px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:13px}.listen-orb{width:92px;height:92px;display:grid;place-items:center;border-radius:50%;color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,white)}.quiz-question small{color:var(--muted)}.math-question{font-size:clamp(42px,8vw,72px)!important;letter-spacing:.02em}.quiz-options{display:grid;grid-template-columns:repeat(2,1fr);gap:11px;max-width:680px;margin:0 auto}.quiz-option{min-height:62px;border:1px solid #dee3ee;border-radius:13px;background:#fff;font-weight:800;cursor:pointer}.quiz-option:hover{color:var(--accent);border-color:var(--accent);background:color-mix(in srgb,var(--accent) 5%,white)}.answer-form{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:9px}.answer-form label{font-size:12px;font-weight:800}.answer-form input{width:180px;height:48px;padding:0 13px;border:1px solid #dce2ed;border-radius:11px;font-size:18px;font-weight:800;text-align:center}.number-line-wrap{margin:90px 30px 50px}.number-line-wrap input[type=range]{width:100%;accent-color:var(--accent);cursor:grab}.tick-labels{display:flex;justify-content:space-between;color:#6c778c;font-size:10px}.nudge-row{display:flex;align-items:center;justify-content:center;gap:18px;margin-top:25px}.nudge-row button{width:45px;height:45px;display:grid;place-items:center;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer}.nudge-row strong{min-width:80px;font-size:22px}.fraction-target{font-size:52px!important}.fraction-canvas{margin:20px 0}.fraction-whole{min-height:100px;display:flex;align-items:stretch;border:2px solid #304b94;border-radius:13px;overflow:hidden;background:#f4f6fb}.fraction-whole>button{min-width:50px;border:0;border-right:2px solid white;color:#1c3e86;background:color-mix(in srgb,var(--accent) 25%,white);cursor:pointer;font-weight:800}.fraction-whole>span{margin:auto;color:#939caf;font-size:12px}.fraction-blocks{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}.fraction-blocks button{width:110px;min-height:70px;padding:8px;display:grid;gap:6px;border:1px solid #dce2ed;border-radius:12px;background:#fff;cursor:pointer}.fraction-blocks button span{display:block;height:15px;border-radius:4px;background:var(--accent)}.result-card{min-height:590px;padding:60px 24px;text-align:center;border:1px solid var(--line);border-radius:25px;background:#fff;box-shadow:var(--shadow)}.result-icon{width:76px;height:76px;margin:0 auto 20px;display:grid;place-items:center;color:#d88900;background:#fff2cf;border-radius:50%}.result-card h2{margin:5px 0 34px;font-size:29px}.result-metrics{max-width:640px;margin:0 auto 32px;display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:16px;overflow:hidden}.result-metrics>div{min-height:104px;display:grid;place-content:center;gap:6px;border-right:1px solid var(--line)}.result-metrics>div:last-child{border:0}.result-metrics strong{font-size:24px;color:var(--blue)}.result-metrics span{color:var(--muted);font-size:10px}.empty-message{padding:60px;text-align:center;color:var(--muted)}@media(max-width:1050px){.hero,.catalog-section,footer{margin-left:24px;margin-right:24px}.courseware-grid{grid-template-columns:repeat(3,1fr)}.hero{padding:52px}}@media(max-width:820px){.hero{min-height:430px;grid-template-columns:1fr;padding:46px}.hero-visual{display:none}.courseware-grid{grid-template-columns:repeat(2,1fr)}.catalog-tools{align-items:stretch;flex-direction:column}.search-box{width:100%}.setup-hero{grid-template-columns:auto 1fr;padding:28px}.setup-play{grid-column:1 / -1;width:100%}.content-set-card{grid-template-columns:auto 1fr}.set-actions{grid-column:1 / -1;justify-content:flex-end}.dataset-name,.import-grid{grid-template-columns:1fr}.pair-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:580px){.app-header{height:68px;padding:0 16px}.app-header nav>a{font-size:0}.app-header nav>a svg{width:21px;height:21px}.brand small{display:none}.hero{min-height:auto;margin:4px 12px 0;padding:38px 24px;border-radius:23px}.hero h1{font-size:42px}.hero-copy>p{font-size:14px}.hero-points{gap:10px;flex-direction:column}.catalog-section{margin:58px 16px}.catalog-heading{align-items:start;flex-direction:column}.catalog-heading h2{font-size:26px}.catalog-heading>p{margin:0}.subject-tabs{width:100%}.subject-tabs button{flex:1;padding:9px 12px}.courseware-grid{grid-template-columns:1fr}.courseware-card{min-height:335px}footer{margin:0 16px;flex-direction:column;gap:8px}.setup-page,.editor-page{padding:18px 14px 55px}.setup-hero{grid-template-columns:1fr;text-align:center}.setup-hero .courseware-icon,.setup-hero .card-topline{margin-left:auto;margin-right:auto}.section-heading{align-items:stretch;flex-direction:column}.content-set-card{grid-template-columns:1fr;text-align:center}.set-icon,.source-label{margin:auto}.set-actions{justify-content:center;flex-wrap:wrap}.editor-titlebar{grid-template-columns:auto 1fr;gap:10px}.editor-titlebar>div{text-align:left}.editor-titlebar>.primary-button{grid-column:1 / -1}.panel-heading{align-items:stretch;flex-direction:column}.panel-heading>.secondary-button{align-self:flex-start}.play-page{padding:8px 10px 45px}.game-header{grid-template-columns:50px 1fr 50px}.game-header .back-link,.game-header>.secondary-button{width:46px;min-width:46px;padding:0;font-size:0}.game-header h1{font-size:19px}.engine-panel{min-height:560px;padding:15px;border-radius:18px}.engine-stats{gap:13px;padding:0 10px}.pair-grid{grid-template-columns:repeat(2,1fr);gap:8px}.pair-card{min-height:82px}.pair-card strong{font-size:14px}.question-card{padding:20px 12px}.sequence-zone{padding:10px}.engine-actions{flex-wrap:wrap}.classification-source{gap:7px}.classify-card{min-width:92px}.category-grid{grid-template-columns:repeat(2,1fr)}.quiz-options{grid-template-columns:1fr}.number-line-wrap{margin:75px 3px 40px}.tick-labels span:nth-child(2n){display:none}.result-card{padding:40px 16px}.result-metrics{grid-template-columns:repeat(2,1fr)}.result-metrics>div:nth-child(2){border-right:0}.result-metrics>div:nth-child(-n+2){border-bottom:1px solid var(--line)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}