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24px;position:relative}.summary-close{position:absolute;top:20px;left:24px}.summary-header-inner{flex-direction:column;align-items:center;gap:8px;display:flex}.summary-intro{text-align:center}.summary-intro p{color:var(--kb-night-200);margin:8px 0 0}.summary-header .overline{color:var(--kb-star-400);margin-bottom:12px}.summary-content{background:#fff;border-radius:28px 28px 0 0;gap:20px;margin-top:-1px;padding:20px 20px 170px;display:grid;position:relative}.summary-stats{grid-template-columns:repeat(3,1fr);gap:10px}.summary-stats.narrow-only{display:grid}.summary-stats>div{background:var(--kb-neutral-50);border-radius:16px;gap:6px;padding:14px 16px;display:grid}.summary-stats strong{font:700 24px/30px var(--kb-font-display)}.summary-stats span{color:var(--kb-muted);font-size:12px}.summary-results h2,.summary-reasoning h2{margin:0 0 10px}.summary-reasoning{gap:16px;display:grid}.summary-reasoning p{margin:10px 0 0}.summary-actions .bar-inner{gap:10px}@media (min-width:900px){.home-stack>.h-display{margin-bottom:0}.hero-meta .btn{align-self:flex-start}.study-cards{background:var(--kb-bg)}.study-surface .bottom-bar{padding:16px 40px 20px}.study-surface .bottom-bar>.bar-inner{max-width:none}.summary-actions .bar-inner>.btn{margin-left:0}.session-body{max-width:820px;padding-top:26px}.session-body[data-phase=lesson]{max-width:720px;padding-top:44px}.session-body[data-phase=cards]{max-width:680px;padding-top:88px}.study-cards .flip{min-height:360px}.study-cards .bar-inner>.btn-secondary{margin-left:0}.session-body[data-phase=question]{max-width:760px;padding-top:44px}.session-body[data-phase=question] textarea{min-height:240px}.reasoning-grid,.answer-disclosures{grid-template-columns:1fr 1fr}.result-calibration{text-align:right}.feedback-note{font-size:17px;line-height:26px}.new-material-page{padding:40px 20px 80px}.new-material-page .bottom-bar{background:0 0;border:0;padding:8px 0;position:static}.new-material-page .segmented{align-self:flex-start;min-width:238px}.new-material-page>a:first-child{display:none!important}.new-material-page .drop{min-height:200px}.summary-header{min-height:284px;padding:40px 80px}.summary-close{display:none}.summary-header-inner{grid-template-columns:220px 1fr;gap:48px;max-width:1120px;margin:auto;display:grid}.summary-intro{text-align:left}.summary-intro .h-display{font-size:40px;line-height:46px}.summary-header .summary-stats{margin-top:12px;display:flex}.summary-header .summary-stats>div{background:var(--kb-night-900)}.summary-header .summary-stats span{color:var(--kb-night-200)}.summary-content{background:0 0;max-width:820px;margin:auto;padding:24px 20px}.summary-stats.narrow-only{display:none}.summary-reasoning{grid-template-columns:1fr 1fr}.summary-actions{background:0 0;border:0;padding:0;position:static}.summary-actions .bar-inner{justify-content:flex-end;display:flex}.summary-another{order:2}.summary-back{order:1}.summary-actions .btn{margin-left:0}.flow-status{padding-top:70px}.flow-header{max-width:720px;margin:0 auto 24px}.flow-card{border:1px solid var(--kb-border);background:#fff;border-radius:24px;min-height:540px;padding:40px}.flow-ring>div{background:#fff}.topnav{border-bottom:1px solid var(--kb-border);background:#fff;align-items:center;gap:16px;height:70px;padding:0 40px;display:flex}.topnav nav{gap:8px;display:flex}.topnav nav a{color:var(--kb-muted);border:1.5px solid #0000;border-radius:999px;padding:8px 18px;font-weight:600}.topnav nav a[aria-current=page]{background:var(--kb-star-50);border-color:var(--kb-ink);color:var(--kb-ink)}.topnav .grow{flex:1}.tabbar,.mobile-head{display:none}.page{padding:40px 80px 140px}.h-display{font-size:32px;line-height:36px}.materials-grid{grid-template-columns:repeat(3,1fr)}.wide-only{display:grid}.narrow-only{display:none}.hero{grid-template-columns:1.05fr 1fr;grid-template-areas:"head art""meta art";align-content:center;column-gap:40px;padding:34px 36px;display:grid}.home-stack{gap:28px}.hero{min-height:276px}.hero-title{margin-bottom:14px;font-size:32px;line-height:36px}.hero-next{order:-1;margin-bottom:14px}.hero-progress{margin-bottom:24px}.hero .constellation{height:180px}.hero-head{grid-area:head}.hero-meta{grid-area:meta}.hero .constellation{grid-area:art;align-self:center;height:180px}.hero .btn{width:auto}.bottom-bar .btn{width:auto;margin-left:auto}.bottom-bar>.bar-inner{justify-content:flex-end;align-items:center;gap:16px;display:flex}.bar-inner>.caption{margin-right:auto}.sheet-backdrop{align-items:center}.sheet{border-radius:28px;padding-bottom:20px}.page-narrow{max-width:720px}.session{border-bottom:1px solid var(--kb-border);background:#fff;grid-template-columns:1fr minmax(0,720px) 1fr;grid-template-areas:"left tabs right";padding:12px 24px}.session-left,.session-right{padding-bottom:0}.session-right{justify-self:end}.tabs{padding:0}}