.study{max-width:760px;min-height:65vh;margin:32px auto 72px}.study h1{letter-spacing:-.025em;margin:0;font-size:clamp(32px,5vw,48px);font-weight:650;line-height:1.18}.study h2{margin:0;font-size:23px;font-weight:650;line-height:1.35}.study p{margin:0}.study-stack{flex-direction:column;gap:24px;display:flex}.study-eyebrow{color:var(--cr-text-muted);font-size:14px;font-weight:600}.study-lead{color:var(--cr-text-muted);max-width:52ch;font-size:19px}.study-panel{background:var(--cr-surface);border-radius:var(--cr-radius-surface);padding:28px}.study-actions{flex-wrap:wrap;gap:12px;display:flex}.study-button{border:1px solid var(--cr-primary);border-radius:var(--cr-radius-control);background:var(--cr-primary);color:var(--cr-on-primary);font:inherit;cursor:pointer;min-height:52px;padding:14px 20px;font-size:16px;font-weight:600}.study-button.secondary{color:var(--cr-text);border-color:var(--cr-control-border);background:0 0}.study-button:disabled,.study-topic:disabled{opacity:.55;cursor:default}.study-button:hover:not(:disabled){filter:brightness(.95)}.study-note{color:var(--cr-text-muted);font-size:14px;line-height:1.65}.study-progress{border-bottom:1px solid var(--cr-border);color:var(--cr-text-muted);padding:0 0 24px}.study-topics{gap:20px;margin-top:32px;display:grid}.study-topic-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.study-topic{text-align:left;font:inherit;color:var(--cr-text);border:1px solid var(--cr-control-border);border-radius:var(--cr-radius-control);cursor:pointer;background:0 0;flex-direction:column;gap:8px;min-height:108px;padding:20px;display:flex}.study-topic span{font-weight:600}.study-topic small{color:var(--cr-text-muted);font-size:13px}.study-topic:hover:not(:disabled){background:var(--cr-selected)}.study-storage{border-top:1px solid var(--cr-border);margin-top:32px;padding-top:24px}.study-text-button{color:var(--cr-text-muted);font:inherit;text-underline-offset:5px;cursor:pointer;background:0 0;border:0;min-height:48px;padding:12px 0;font-size:14px;text-decoration:underline}.study-session-heading{justify-content:space-between;align-items:center;gap:16px;display:flex}.study h1.study-question{letter-spacing:-.015em;font-size:clamp(25px,4vw,32px);line-height:1.35}.study-meter{background:var(--cr-border);width:100%;height:6px;accent-color:var(--cr-primary);border:0;border-radius:8px;display:block;overflow:hidden}.study-meter::-webkit-progress-bar{background:var(--cr-border)}.study-meter::-webkit-progress-value{background:var(--cr-primary)}.study-meter::-moz-progress-bar{background:var(--cr-primary)}.study-choices{border:0;gap:12px;min-width:0;margin:0;padding:0;display:grid}.study-choice{border:2px solid var(--cr-control-border);border-radius:var(--cr-radius-control);cursor:pointer;background:var(--cr-surface);align-items:flex-start;gap:14px;padding:18px 20px;display:flex}.study-choice.selected{border-color:var(--cr-primary);background:var(--cr-selected)}.study-choice input{width:20px;height:20px;accent-color:var(--cr-primary);flex:0 0 20px;margin:4px 0 0}.study-choice:focus-within{outline:3px solid var(--cr-focus);outline-offset:4px}.study-choice small{color:var(--cr-text-muted);margin-top:4px;font-size:13px;font-weight:600;display:block}.study-choices:disabled .study-choice{cursor:default}.study-feedback{border-radius:var(--cr-radius-surface);gap:12px;padding:24px;display:grid}.study-feedback.correct{background:var(--cr-success-surface)}.study-feedback.correct h2{color:var(--cr-success)}.study-feedback.incorrect{background:var(--cr-error-surface)}.study-feedback.incorrect h2{color:var(--cr-error)}.study-notice{color:var(--cr-error);background:var(--cr-error-surface);border-radius:var(--cr-radius-control);padding:16px;margin-bottom:24px!important}.study [tabindex="-1"]:focus{outline:none}@media (max-width:600px){.study{margin-top:24px}.study-panel{padding:24px}.study-topic-grid{grid-template-columns:1fr}.study-topic{min-height:0}.study-actions{flex-direction:column}}