html {
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100%;
    position: relative;
    background-color: #562CC4 !important;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", "Helvetica Neue", Helvetica, Tahoma, Arial,"PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
}
body {
    margin: 0;
    padding: 0;
    background-image: linear-gradient(135deg, rgba(60, 8, 118, 0.8) 0%, rgba(250, 0, 118, 0.8) 100%) !important;
}
a {
    color: black;
    text-decoration: none;
}
section {
    max-width: 1200px;
    margin: 0 auto !important;
    display: block;
    background-color: transparent !important;
}
iframe {
    width: 100%;
    height: 100%;
    background-color: white;
    border: none;
}
footer {
    text-align: center;
    font-size: 0.8rem;
    padding-bottom: 1rem;
    background-color: white;
}
.b-container {
    background-color: white;
    border-radius: 1rem;
    margin: 0 0.6rem 0.5rem;
    box-shadow: 0 5px 15px 0 rgba(0, 0, 0, 0.35);
    padding: 0.5rem 0.8rem;
    position: relative;
}
.b-body {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}
.b-title, .b-title-small, .b-lesson-title {
    color: #C44A2B;
    font-weight: bold;
}
.b-flex-between {
    display: flex !important;
    justify-content: space-between;
    align-items: center;
}

.b-lesson-list {
    background-color: white !important;
    padding: 1rem 0.5rem;
}
.b-stage-title {
    padding: 0;
    text-align: center
}
.b-locked {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
}

.b-lesson-icon {
    display: flex;
    background-color: #562CC4;
    justify-content: center;
    align-items: center;
    height: 3rem;
    width: 3rem;
    color: white;
    border-radius: 100%;
}
.b-lesson-info {
    min-width: 70%;
    text-align: start;
}
.b-lesson-intro {
    font-size: 0.8rem;
}
.b-lesson-start {
    font-size: 2rem;
    color: #562CC4;
}


.b-head-nav {
    background-color: transparent;
    margin-bottom: 0.5rem;
    padding: 0.5rem 0.8rem;
    position: relative;
}
.go-back {
    height: 1.5rem;
    width: 1.5rem;
    border-radius: 100%;
    background-color: white;
    box-shadow: 0 5px 15px 0 rgba(0, 0, 0, 0.35);
    display: flex;
    justify-content: center;
    align-items: center;
}
.b-lesson-player {
    height: 84svh;
    height: 84vh;
}
.b-head-nav .b-title {
    color: white;
}