/* MathCourse Learning UI — mobile-first, lightweight. */
.mc-learning-page{min-height:70vh;padding:20px 0 48px;background:var(--mc-bg,#f6f8fb)}
.mc-learning-page .mc-video-card,.mc-learning-page .mc-lesson-card,.mc-learning-page .mc-outline-card{background:#fff;border:1px solid var(--mc-line,#e5eaf0);border-radius:16px;box-shadow:0 8px 28px rgba(13,41,66,.055)}
.mc-learning-page .mc-video-card{overflow:hidden;margin-bottom:12px}
.mc-learning-page .mc-video-box{background:#0b1724;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;color:#fff}
.mc-learning-page .mc-video-box video,.mc-learning-page .mc-video-box .video-js{width:100%;height:100%}
.mc-learning-page .mc-lesson-card{padding:18px 20px;margin-bottom:12px}
.mc-learning-page .mc-lesson-header{display:flex;align-items:center;justify-content:space-between;gap:12px}
.mc-learning-page .mc-lesson-header h1{margin:0;color:var(--mc-navy,#0d2942);font-size:19px;line-height:1.45;letter-spacing:-.025em}
.mc-learning-page .mc-outline-card{padding:18px 20px 22px}
.mc-learning-page .mc-outline-card h2{margin:0 0 15px;color:var(--mc-navy,#0d2942);font-size:16px}
.mc-learning-page .mc-outline-card a{min-height:44px;display:flex;align-items:center}
.mc-learning-page .mc-outline-card a:focus-visible,.mc-learning-page .mc-lesson-card a:focus-visible{outline:3px solid rgba(23,105,224,.22);outline-offset:2px}
@media(min-width:900px){.mc-learning-page{padding:28px 0 64px}.mc-learning-page .mc-video-card{margin-bottom:14px}.mc-learning-page .mc-lesson-card{padding:20px 24px}.mc-learning-page .mc-outline-card{padding:22px 24px 26px}}
@media(max-width:640px){.mc-learning-page{padding:0 0 28px}.mc-learning-page .mc-video-card{border-radius:0;margin:0 0 10px;border-left:0;border-right:0;box-shadow:none}.mc-learning-page .mc-video-box{border-radius:0}.mc-learning-page .mc-lesson-card{margin:0 10px 10px;padding:14px 15px;border-radius:12px;box-shadow:0 4px 18px rgba(13,41,66,.045)}.mc-learning-page .mc-lesson-header{align-items:flex-start;gap:10px}.mc-learning-page .mc-lesson-header h1{font-size:17px;line-height:1.5}.mc-learning-page .mc-outline-card{margin:0 10px;padding:0;border-radius:12px;overflow:hidden;box-shadow:0 4px 18px rgba(13,41,66,.045)}.mc-learning-page .mc-outline-card h2{margin:0;padding:14px 15px;border-bottom:1px solid #edf1f5;font-size:15px}.mc-learning-page .mc-outline-card a{min-height:46px;padding:0 15px}.mc-learning-page .mc-outline-card a+a{border-top:1px solid #f1f4f7}}
@media(max-width:380px){.mc-learning-page .mc-lesson-card{margin-left:8px;margin-right:8px;padding-left:13px;padding-right:13px}.mc-learning-page .mc-outline-card{margin-left:8px;margin-right:8px}.mc-learning-page .mc-outline-card a{padding-left:13px;padding-right:13px}}
@media(prefers-reduced-motion:reduce){.mc-learning-page *,.mc-learning-page *::before,.mc-learning-page *::after{transition:none!important;scroll-behavior:auto!important}}