:root{color:#172033;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--text:#172033;--muted:#667085;--surface:#fff;--surface-strong:#eef4ff;--border:#d9e1ec;--primary:#0f766e;--primary-dark:#115e59;--accent:#2563eb;--danger:#b42318;--success:#067647;--shadow:0 18px 42px #141f3714;background:#f6f7fb;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif}*{box-sizing:border-box}body{min-height:100vh;color:var(--text);background:#f6f7fb;margin:0;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{border:0}h1,h2,h3,p{margin:0}h1{letter-spacing:0;font-size:clamp(2.2rem,5vw,4.25rem);line-height:1}h2{letter-spacing:0;font-size:1.2rem;line-height:1.25}h3{letter-spacing:0;font-size:1.05rem;line-height:1.25}#root{min-height:100vh}.app-shell{width:min(1180px,100% - 32px);margin:0 auto;padding:18px 0 44px}.topbar{justify-content:space-between;align-items:center;gap:16px;padding:10px 0 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strong{color:var(--danger)}.answer-feedback.neutral{background:#eef4ff;border-color:#d5e4ff}.answer-values{flex-wrap:wrap;gap:8px;display:flex}.answer-values span{min-height:34px;color:var(--muted);background:#ffffffb8;border:1px solid #d9e1eccc;border-radius:8px;align-items:center;gap:6px;padding:7px 9px;font-weight:800;display:inline-flex}@media (width<=960px){.topbar{flex-direction:column;align-items:flex-start}.home-hero,.hero-panel,.mission-grid,.level-ladder,.two-columns,.three-columns,.stats-grid,.game-shell{grid-template-columns:1fr}.nav-links,.topbar-actions{width:100%}}@media (width<=720px){.app-shell{width:min(100% - 20px,1180px);padding:10px 0 28px}.topbar{z-index:20;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#f6f7fbf5;flex-direction:row;align-items:center;padding:8px 0 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p{min-height:auto}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stat-card{min-height:96px}.game-shell{flex-direction:column;display:flex}.sprint-card{order:1}.settings-panel{order:2}.settings-panel summary{min-height:48px;color:var(--text);cursor:pointer;justify-content:space-between;align-items:center;margin:-4px 0 2px;font-weight:900;display:flex}.settings-panel summary:after{content:"+";color:var(--primary-dark);font-size:1.3rem}.settings-panel[open] summary:after{content:"−"}.segmented-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.segment{min-height:46px}.session-banner{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;padding:6px}.session-banner>div{min-height:68px;padding:8px}.session-banner span{font-size:.78rem}.session-banner strong{font-size:1.05rem}.sprint-topline{grid-template-columns:minmax(0,1fr) auto;align-items:start;display:grid}.question-line{min-height:150px;font-size:clamp(3.2rem,18vw,5.5rem)}.skill-hint{margin-top:-10px}.form-card{padding:18px}}@media (width<=640px){.app-shell{width:min(100% - 24px,1180px);padding:12px 0 32px}.card,.dashboard-hero,.focus-band,.home-loop-section{padding:18px}.hero-panel{padding:24px}.nav-link,.primary-button,.secondary-button,.ghost-button{width:100%}.mobile-menu-button{width:44px}.mobile-nav-link{width:100%}.focus-band,.session-row,.skill-row,.error-row,.sprint-topline,.quiz-form{flex-direction:column;grid-template-columns:1fr;align-items:stretch}.two-fields,.arena-lanes{grid-template-columns:1fr}.arena-lanes>div{min-height:76px}.result-grid,.session-banner{grid-template-columns:repeat(2,minmax(0,1fr))}.score-block,.progress-meta{text-align:left;justify-items:start}.level-metrics{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=420px){.app-shell{width:min(100% - 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