.lessons-header {
    text-align: center;
    margin-bottom: 2rem;
}
.lessons-header h1 {
    color: var(--primary-dark);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}
.lessons-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}
.lessons-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.lesson-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
    border-bottom: 4px solid var(--border-lesson);
    cursor: pointer;
}
.lesson-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}
.lesson-number {
    background: var(--primary-gradient);
    color: var(--text-white);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem auto;
    font-size: 1.3rem;
    font-weight: bold;
}
.lesson-card h3 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}
.lesson-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}
.lesson-card a {
    display: inline-block;
    background: var(--primary-dark);
    color: var(--text-white);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    text-decoration: none;
    font-size: 0.8rem;
    transition: 0.3s;
}
.lesson-card a:hover {
    background: var(--accent);
    color: var(--primary-dark);
}
.lesson-full-row {
    margin-top: 1rem;
    margin-bottom: 2rem;
}
.full-card {
    background: linear-gradient(135deg, #667eea, #764ba2);
    padding: 2rem;
    border-radius: 25px;
    text-align: center;
    color: var(--text-white);
    transition: 0.3s;
    cursor: pointer;
}
.full-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}
.full-card .lesson-number {
    background: var(--accent);
    color: var(--primary-dark);
    width: 55px;
    height: 55px;
    font-size: 1.5rem;
}
.full-card a {
    display: inline-block;
    background: var(--accent);
    color: var(--primary-dark);
    padding: 0.7rem 1.8rem;
    border-radius: 40px;
    text-decoration: none;
    font-weight: bold;
}

@media (max-width: 992px) {
    .lessons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 576px) {
    .lessons-grid {
        grid-template-columns: 1fr;
    }
}