* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    min-height: 100%;
}

body {
    background: #111;
    color: #fff;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.course-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 50px 25px;
    position: relative;
}

.course-card {
    width: min(1100px, 100%);
    background: #1b1b1b;
    padding: 35px;
    box-shadow: 0 8px 35px rgba(0,0,0,.45);
}

.course-image {
    display: block;
    width: 100%;
    max-height: 58vh;
    object-fit: contain;
    background: #000;
}

.course-content {
    padding: 28px 10px 5px;
}

.course-title {
    margin: 0 0 8px;
    font-size: 30px;
    line-height: 1.15;
    letter-spacing: 1px;
    font-weight: 600;
}

.course-teacher {
    margin: 0 0 20px;
    font-size: 16px;
    color: #bbb;
}

.course-description {
    margin: 0;
    max-width: 850px;
    font-size: 17px;
    line-height: 1.75;
    color: #e6e6e6;
}

.course-contact {
    margin-top: 22px;
    font-size: 15px;
}

.course-contact a {
    color: #fff;
    text-decoration: underline;
}

.course-close {
    position: fixed;
    top: 18px;
    right: 22px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(0,0,0,.72);
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    line-height: 1;
    z-index: 10;
    border: 1px solid rgba(255,255,255,.25);
}

.course-close:hover,
.course-close:focus {
    background: rgba(255,255,255,.12);
    text-decoration: none;
    color: #fff;
}

@media (max-width: 767px) {
    .course-page {
        padding: 65px 12px 25px;
        align-items: flex-start;
    }

    .course-card {
        padding: 15px;
    }

    .course-image {
        max-height: 45vh;
    }

    .course-content {
        padding: 22px 5px 5px;
    }

    .course-title {
        font-size: 24px;
    }

    .course-description {
        font-size: 16px;
        line-height: 1.65;
    }
}