/* One numbering hierarchy for all course content: 01 →（1）→ ①. */
[data-course-prefix]{font-variant-numeric:tabular-nums;white-space:nowrap}
[data-course-number-level]{line-height:1.6;overflow-wrap:break-word;scroll-margin-top:6rem}
main [data-course-number-level="1"]{font-size:1.35rem;font-weight:700;margin:8px 0 18px}
main [data-course-number-level="2"]{font-size:1.16rem;font-weight:650;margin:18px 0 12px}
main [data-course-number-level="3"]{font-size:1.02rem;font-weight:650;margin:16px 0 10px}
main summary[data-course-number-level]{font-size:1rem;margin:0}
.md-practice-unit{scroll-margin-top:6rem}
.mdp-step-list{list-style:none;padding-left:0}
@media(max-width:620px){
  main [data-course-number-level="1"]{font-size:1.2rem}
  main [data-course-number-level="2"]{font-size:1.08rem}
  main [data-course-number-level="3"]{font-size:1rem}
}