/* پس‌زمینه محو — تصویر دوره + پترن */
.course-ambient-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.course-ambient-bg__cover {
    position: absolute;
    inset: -8%;
    background-image: var(--ambient-cover);
    background-size: cover;
    background-position: center;
    opacity: 0.1;
    filter: blur(48px) saturate(1.1);
    transform: scale(1.08);
}

.course-ambient-bg__pattern {
    position: absolute;
    inset: 0;
    background-image: var(--ambient-pattern);
    background-size: 220px 220px;
    background-repeat: repeat;
    opacity: 0.07;
    mix-blend-mode: soft-light;
}

.page-course-detail .course-ambient-bg__cover {
    opacity: 0.07;
}

.page-course-detail .course-ambient-bg__pattern {
    opacity: 0.05;
}