:root{--safe-tabbar-height: calc(var(--layout-tabbar-height) + env(safe-area-inset-bottom)) }@keyframes underlay-in{0%{opacity:0}to{opacity:1}}@keyframes modal-enter{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:none}}@keyframes modal-enter-slide{0%{opacity:0;transform:translate3d(0,100%,0)}to{opacity:1;transform:translateZ(0)}}.course-header{position:relative}.course-header__cover{aspect-ratio:640 / 200;overflow:hidden;border-top-left-radius:var(--layout-island-border-radius);border-top-right-radius:var(--layout-island-border-radius);position:relative}.course-header__cover img{display:block;width:100%;height:100%;-o-object-fit:cover;object-fit:cover}.course-header__title{font-weight:500;font-size:22px;line-height:30px;line-height:31px;display:flex;align-items:center;gap:8px;margin-bottom:5px}.course-header__avatar{position:relative;width:96px;height:96px;margin-left:-3px;margin-bottom:10px;border-radius:100%;overflow:hidden;border:3px solid var(--theme-color-background-content);background-color:var(--theme-color-background-content)}.course-header__description{margin-bottom:12px}.course-header--with-cover{padding-top:0}.course-header--with-cover .course-header__avatar{margin-top:-51px}