.lesson-box{margin:1.5rem 0;padding:1rem 1.25rem;border-left:3px solid #b84636;background:#f1f4f1}.lesson-box p{margin:.35rem 0}.stat-table-wrap{margin:1.5rem 0;overflow-x:auto}.stat-table{width:100%;min-width:620px;border-collapse:collapse}.stat-table th,.stat-table td{padding:.7rem .8rem;border-bottom:1px solid #9aaba4;text-align:left;vertical-align:top}.stat-table th{color:#123e31;font-family:"Yu Gothic","Hiragino Kaku Gothic ProN",sans-serif;font-size:.9rem}.formula{margin:1.4rem 0;padding:1rem;border:1px solid #31584c;font-weight:700;overflow-wrap:anywhere}.lesson-nav{display:flex;justify-content:space-between;gap:1rem;margin-top:3rem;padding-top:1.5rem;border-top:1px solid #31584c}.lesson-nav a{max-width:48%}@media(max-width:600px){.lesson-box{padding:.8rem 1rem}.lesson-nav{flex-direction:column}.lesson-nav a{max-width:100%}}