.btn-l {
    cursor: pointer;
    border: 1px solid #ccc;
    padding: 10px;
    margin: 5px;
    background: #fff;
    border-radius: 5px;
    display: inline-block;
    text-align: center;
    width: 150px;
}
.level-name {
    font-weight: bold;
    margin-bottom: 5px;
}
.level-text {
    font-size: 12px;
    color: #666;
}
.level-number {
    font-size: 18px;
    font-weight: bold;
    margin-top: 5px;
}

.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    right:0;
    bottom:0;
    background: rgba(0,0,0,0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.video-content {
    position: relative;
    background: #000;
    padding: 15px;
    border-radius: 8px;
    max-width: 90%;
    max-height: 90%;
    box-sizing: border-box;
    width: 700px;
}

.close-modal {
    position: absolute;
    top: 10px;
    right: 15px;
    color: white;
    font-size: 32px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    z-index: 10000;
}

#video-title {
    margin: 0 0 10px 0;
    font-weight: 600;
    color: white;
    text-align: center;
}