.page-container{min-height:100vh;display:flex;flex-direction:column}.lessons-container{padding:40px 20px}.lessons-title{font-size:2.5rem;color:#0047ab;text-align:center;margin-bottom:20px}.lessons-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}.lesson-card{background-color:#f0f8ff;padding:20px;border-radius:10px;box-shadow:0 4px 6px rgba(0,0,0,.1);text-align:center}.lesson-card h2{font-size:1.5rem;color:#0047ab;margin-bottom:10px}.lesson-card p{font-size:1rem;color:#333;margin-bottom:20px}.lesson-card iframe{width:100%;height:200px;border-radius:10px}@media (max-width:768px){.lessons-title{font-size:2rem}.lesson-card h2{font-size:1.3rem}.lesson-card p{font-size:.9rem}.lesson-card iframe{height:150px}}@media (max-width:480px){.lessons-title{font-size:1.8rem}.lesson-card h2{font-size:1.2rem}.lesson-card p{font-size:.8rem}.lesson-card iframe{height:120px}}.footer{background-color:#0047ab;color:white;padding:20px;text-align:center;margin-top:auto}