.l3-learning { color: var(--ink, #23434d); min-width: 0; }
.l3-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 20px 0; border-bottom: 1px solid #cbdde0; }
.l3-tabs button { padding: 14px 18px; background: transparent; border: 0; border-bottom: 3px solid transparent; color: #536d78; font: inherit; cursor: pointer; }
.l3-tabs [aria-selected="true"] { color: #147783; background: #e5f3f1; border-bottom-color: #147783; font-weight: 700; }
.l3-learning [data-l3-section] { max-width: 1050px; margin: 0 auto 28px; }
.l3-learning [hidden], .course-classroom[hidden] { display: none !important; }
.l3-learning header, .l3-knowledge, .l3-goals, .l3-mistakes, .l3-question, [data-l3-statistics] { padding: 24px; background: #fff; border: 1px solid #dce8ea; border-radius: 16px; margin-bottom: 18px; }
.l3-learning h2, .l3-learning h3 { margin: 0 0 12px; }
.l3-learning p, .l3-learning li { line-height: 1.85; overflow-wrap: anywhere; }
.l3-learning pre { white-space: pre-wrap; overflow-wrap: anywhere; background: #eff5f6; border-radius: 10px; padding: 18px; line-height: 1.7; }
.l3-learning .l3-goals { background: #eef8f5; }
.l3-learning .l3-mistakes { background: #fff9ee; }
.l3-quiz-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.l3-options { display: grid; gap: 10px; }
.l3-options button { display: flex; text-align: left; align-items: start; gap: 14px; padding: 16px; border: 1px solid #d4e1e4; border-radius: 10px; color: inherit; background: #fff; font: inherit; cursor: pointer; }
.l3-options span { overflow-wrap: anywhere; min-width: 0; white-space: pre-wrap; }
.l3-options [aria-pressed="true"] { background: #e2f2ef; border-color: #267f83; }
.l3-options button:disabled { opacity: 1; cursor: default; }
.l3-explanation { padding: 18px; margin-top: 18px; background: #eff6fa; border-radius: 10px; }
@media (max-width: 600px) { .l3-tabs { gap: 0; } .l3-tabs button { padding: 12px 9px; font-size: 14px; } .l3-learning header, .l3-knowledge, .l3-goals, .l3-mistakes, .l3-question { padding: 16px; } .l3-quiz-head { align-items: start; flex-direction: column; } }