.course-page {
    max-width: var(--max-width);
    margin: 22px auto 35px;
    padding: 0 22px;
}

.course-intro {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px 30px 30px;
}

.course-heading {
    display: flex;
    align-items: baseline;
    gap: 14px;
    margin-bottom: 12px;
}

.course-heading small {
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .5px;
}

.course-heading h2 {
    margin: 0;
    color: var(--text);
    font: 700 30px/1.2 Georgia, serif;
}

.course-intro > p {
    margin: 0;
    max-width: 850px;
    color: var(--muted);
    font-size: 15px;
}

.materials {
    margin-top: 22px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 25px 30px;
}

.materials h3 {
    margin: 0 0 16px;
    color: var(--primary-dark);
    font: 700 22px Georgia, serif;
}

.material-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.material-list li {
    border-top: 1px solid var(--border);
}

.material-list li:first-child {
    border-top: 0;
}

.material-list a {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 13px 8px;
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
    border-radius: 6px;
}

.material-list a:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    text-decoration: none;
}

.material-number {
    flex: 0 0 42px;
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    text-align: center;
}

.material-icon {
    margin-left: auto;
    color: var(--primary-dark);
    font-size: 13px;
}

.course-back {
    display: inline-block;
    margin-top: 20px;
    font-size: 13px;
    font-weight: 600;
}

@media (max-width: 900px) {
    .course-page {
        padding: 0 18px;
    }
}

@media (max-width: 650px) {
    .course-intro, .materials {
        padding: 22px;
    }

    .course-heading {
        display: block;
    }

    .course-heading small {
        display: block;
        margin-bottom: 5px;
    }

    .course-heading h2 {
        font-size: 26px;
    }
}