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0;font-size:20px}.arena-stats{align-items:center;gap:10px;display:flex}.arena-stats>div{text-align:center;border:1px solid var(--border);background:#ffffff0d;border-radius:13px;min-width:72px;padding:9px 11px}.arena-stats small{color:var(--muted);text-transform:uppercase;letter-spacing:.1em;font-size:9px;display:block}.arena-stats strong{margin-top:4px;display:block}.question-card{border-radius:28px;flex-direction:column;justify-content:center;min-height:490px;margin-top:18px;padding:clamp(24px,5vw,50px);display:flex}.question-meta{color:var(--muted);justify-content:space-between;font-size:12px;display:flex}.game-question{text-align:center;padding:40px 0 28px}.big-equation{letter-spacing:-.035em;font-size:clamp(45px,9vw,86px);font-weight:900}.big-equation span{color:var(--purple-2);padding:0 .15em}.question-instruction{color:var(--muted);margin-top:13px}.answer-form{width:100%;max-width:560px;margin:0 auto}.answer-pair{grid-template-columns:1fr 1fr auto;gap:10px;display:grid}.input-group label{color:var(--muted);margin:0 0 7px 4px;font-size:11px;display:block}.choices{grid-template-columns:1fr 1fr;gap:12px;display:grid}.choice-button{border:1px solid var(--border);cursor:pointer;background:#ffffff0e;border-radius:16px;padding:17px;font-size:18px;font-weight:900;transition:all .18s}.choice-button:hover{background:#8b5cf61f;border-color:#a78bfa73;transform:translateY(-2px)}.feedback{text-align:center;max-width:620px;min-height:42px;margin:18px auto 0;font-weight:800;line-height:1.5}.feedback.correct{color:#a7f3d0}.feedback.incorrect{color:#fda4af}.progress-grid{grid-template-columns:1.6fr repeat(2,.7fr);gap:14px;display:grid}.progress-summary{border-radius:24px;grid-row:span 2;align-items:center;gap:23px;padding:26px;display:flex}.ring{--p:0;aspect-ratio:1;background:conic-gradient(var(--purple) calc(var(--p) * 1%),#ffffff12 0);border-radius:50%;flex:none;place-items:center;width:132px;display:grid;position:relative}.ring:after{content:"";border:1px solid var(--border);background:#10182a;border-radius:50%;position:absolute;top:11px;right:11px;bottom:11px;left:11px}.ring span{z-index:1;font-size:27px;font-weight:900;position:relative}.progress-summary h3{margin:7px 0;font-size:24px}.progress-summary p:last-child{color:var(--muted);line-height:1.6}.metric{border-radius:20px;flex-direction:column;justify-content:center;padding:23px;display:flex}.metric strong{font-size:31px}.two-column{grid-template-columns:1fr 1fr;gap:16px;margin-top:16px;display:grid}.panel{border-radius:24px;padding:24px}.panel-title h3{margin:5px 0 20px}.level-bars{gap:17px;display:grid}.level-row{grid-template-columns:95px 1fr 44px;align-items:center;gap:12px;display:grid}.level-row span{color:var(--muted);font-size:12px}.level-bar{background:#ffffff0f;border-radius:99px;height:10px;overflow:hidden}.level-bar 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8px}.help-card p,.teacher-note p{color:var(--muted);line-height:1.65}.teacher-note{border-radius:22px;gap:16px;margin-top:16px;padding:24px;display:flex}.teacher-note-icon{width:45px;height:45px;color:var(--cyan-2);background:#22d3ee1f;border-radius:14px;flex:none;place-items:center;font-family:serif;font-size:22px;font-weight:900;display:grid}.teacher-note h3{margin:2px 0 5px}.teacher-note p{margin:0}.modal{z-index:80;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#02050cb8;place-items:center;padding:20px;display:grid;position:fixed;top:0;right:0;bottom:0;left:0}.modal-card{text-align:center;border-radius:28px;width:min(480px,100%);padding:34px}.modal-icon{color:#fff;background:linear-gradient(135deg,#8b5cf647,#22d3ee33);border-radius:22px;place-items:center;width:68px;height:68px;margin:0 auto 18px;font-size:28px;display:grid}.modal-card h2{margin:0 0 8px}.modal-card>p{color:var(--muted);line-height:1.6}.modal-stats{grid-template-columns:repeat(3,1fr);gap:9px;margin:22px 0;display:grid}.modal-stats div{border:1px solid var(--border);background:#ffffff0d;border-radius:14px;padding:13px 8px}.modal-stats small,.modal-stats strong{display:block}.modal-stats small{color:var(--muted);text-transform:uppercase;font-size:9px}.modal-stats strong{margin-top:5px;font-size:21px}.modal-actions{justify-content:center;gap:10px;display:flex}.toast{z-index:100;border:1px solid var(--border-strong);box-shadow:var(--shadow);opacity:0;pointer-events:none;background:#151f36;border-radius:14px;padding:12px 17px;font-size:13px;font-weight:750;transition:all .25s;position:fixed;bottom:28px;left:50%;transform:translate(-50%,20px)}.toast.show{opacity:1;transform:translate(-50%)}@media(max-width:1050px){.app-shell{grid-template-columns:88px minmax(0,1fr)}.sidebar{padding-left:10px;padding-right:10px}.brand{justify-content:center;padding-left:0;padding-right:0}.brand>span:last-child,.nav-item span:last-child,.sidebar-footer .text-button{display:none}.nav-item{justify-content:center}.nav-item>span:first-child{width:34px;height:34px}.sidebar-footer{justify-content:center}.hero{grid-template-columns:1fr .8fr}.dashboard-grid{grid-template-columns:repeat(2,1fr)}.feature-grid,.game-grid{grid-template-columns:1fr}.game-card{min-height:auto}.progress-grid{grid-template-columns:1fr 1fr}.progress-summary{grid-area:auto/1/auto/-1}}@media(max-width:760px){.paper-division{grid-template-rows:minmax(94px,auto) minmax(135px,1fr);grid-template-columns:minmax(190px,1.6fr) minmax(104px,.72fr)}.paper-left{padding-right:15px}.paper-side-cell{padding:12px 13px}.paper-work{font-size:clamp(29px,10.5vw,43px)}.paper-side-value{font-size:clamp(32px,10.5vw,46px)}.paper-label{font-size:8px}.paper-status{font-size:11px}.app-shell{padding:10px;display:block}.sidebar{width:250px;height:auto;transition:transform .25s;position:fixed;top:10px;bottom:10px;left:10px;transform:translate(-115%)}.sidebar.open{transform:none}.brand{justify-content:flex-start}.brand>span:last-child,.nav-item span:last-child,.sidebar-footer .text-button{display:block}.nav-item{justify-content:flex-start}.sidebar-footer{justify-content:space-between}.topbar{padding:11px 12px;top:10px}.mobile-only{display:grid}.topbar>div:nth-child(2){margin-left:8px;margin-right:auto}.topbar h1{font-size:17px}.topbar .eyebrow,.level-select-wrap label,.xp-pill small{display:none}.level-select-wrap select{max-width:108px}.xp-pill{min-width:61px}.view{padding-top:14px}.hero{grid-template-columns:1fr}.hero-copy{padding:32px 24px 16px}.hero-visual{min-height:330px}.hero h2{font-size:clamp(39px,13vw,58px)}.dashboard-grid,.help-grid,.two-column,.tutor-layout{grid-template-columns:1fr}.coach-card{position:static}.section-heading.compact{flex-direction:column;align-items:flex-start}.step-calculation{grid-template-columns:1fr}.arena-topbar{grid-template-columns:auto 1fr}.arena-stats{grid-column:1/-1;justify-content:stretch}.arena-stats>div{flex:1}.question-card{min-height:450px;padding:24px 17px}.answer-pair{grid-template-columns:1fr 1fr}.answer-pair button{grid-column:1/-1}.choices{grid-template-columns:1fr}.progress-summary{text-align:center;flex-direction:column}.modal-stats{grid-template-columns:1fr 1fr 1fr}}@media(max-width:440px){.topbar-actions{gap:5px}.xp-pill{display:none}.hero-actions,.modal-actions{flex-direction:column}.hero-actions button,.modal-actions button{width:100%}.dashboard-grid{grid-template-columns:1fr 1fr;gap:9px}.stat-card{min-height:82px;padding:13px}.stat-icon{width:36px;height:36px}.stat-card strong{font-size:20px}.tutor-input-row{flex-direction:column}.level-row{grid-template-columns:76px 1fr 36px;gap:8px}.badges-grid{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}