:root { --ce-radius: .75rem; }
body { font-size: .95rem; }
.card { border-radius: var(--ce-radius); }
.lesson-content h2 { font-size: 1.25rem; margin-top: 1.5rem; font-weight: 600; }
.lesson-content h3 { font-size: 1.1rem;  margin-top: 1.2rem; font-weight: 600; }
.lesson-content table { font-size: .9rem; }
.lesson-content blockquote { background: var(--bs-tertiary-bg); padding: .75rem 1rem; border-radius: .5rem; }
.kax-badge { font-variant-numeric: tabular-nums; }
.chat-msg { max-width: 85%; }
.chat-user { margin-left: auto; background: var(--bs-primary-bg-subtle); }
.chat-ai   { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color); }
.progress-thin { height: .4rem; }
@media print { nav, footer, .no-print { display: none !important; } }