Thanks, I guess I fixed my css by coping each code one by one back in.
On Desktop everything looks good again.
But the button on the mobile slider just won’t change.
Here is my current full css.

/* Header mobile */
@media only screen and (max-width: 767px) {
  .responsive #top #wrap_all #header {
    position: fixed;
  }
}
@media only screen and (max-width: 767px) {
.responsive #header_main .container {
    height: 50px !important;
}
.responsive .logo a {
    vertical-align: top !important;
}
.responsive .logo img {
    max-height: 50px !important;
}
}
@media only screen and (max-width: 767px) {
.responsive #top #wrap_all .main_menu {
    top: -15px;
    height: 45px;
    left: auto;
    right: 0;
    display: block;
    position: absolute;
}
}
@media only screen and (max-width: 500px) { 
.responsive #top #wrap_all #main {
        padding-top: 50px !important;
    }
}
/* Farbe Nachrichtenversand */
h3.avia-form-success{
 color:#99a502!important;	
}
/* Text mit Foto*/
.avia_textblock p img {
	  border-radius: 100%;
	  box-shadow: rgba(255, 255, 255, 0.6) 0px 0px 4px 4px;
}
.avia_textblock img.alignleft {
  margin-right: 40px;
margin-bottom: 20px;
}
@media only screen and (max-width: 767px) { 
#hello .avia_textblock img {
	width: 50%;
}
}
/* ScrollDown Pfeil */
#top .scroll-down-link {
	color: #a47654;
}
/* Blog Leerzeile entfernen */
.page-id-691 #after_section_2 {
  display: none; 
}
/* Blog Postdatum entfernen */
.page-id-691 .av-masonry .av-masonry-date {
  display: none; 
}
/* SocialMedia Icons*/
#top #wrap_all .av-social-link-instagram:hover a, #top #wrap_all .av-social-link-instagram a:focus {
    color: #fff;
    background-color: #c82161;
}
/* Icon Circle schneller*/
.avia_start_animation .avia-icon-circles-inner {
  transition: all 0.2s cubic-bezier(0.175,0.885,0.320,1.275);
}
/* Desktop Menu*/
@media only screen and (max-width: 2500px) {
  #top #header.av_header_transparency .av-main-nav > li.menu-item  {
      display: none!important;
  }
  #top #header.av_header_transparency .av-burger-menu-main {
      cursor: pointer;
      display: block!important;
  }
}
/* Header Button Desktop*/
@media only screen and (max-width: 450px) { 
.slideshow_inner_caption {
	top: -40px;
}
}
@media only screen and (min-width: 768px) { 
#top .caption_bottom .slideshow_caption .slideshow_inner_caption {
    position: relative;
    text-align: center;
}
#top .slideshow_inner_caption .avia-slideshow-button.avia-button {
    width: 500px;
    height: 56px;
    font-size: 22px;
}
@media only screen and (min-width: 768px) { 
.slideshow_inner_caption {
	top: -125px;
}
}
#top #wrap_all .slideshow_inner_caption .avia-slideshow-button.avia-button {
    background-color: #a37652;
    color: white;
    border-radius: 10px;
}
#top #wrap_all .slideshow_inner_caption .avia-slideshow-button.avia-button:hover {
    background-color: #c79a52;
    color: white;
    border-radius: 15px;
}
/* Header Button Mobile*/
@media only screen and (max-width: 767px) {
.home .avia-fullscreen-slider .caption_bottom .slideshow_caption {
    bottom: 250px;
}
.home .slideshow_inner_caption .avia-slideshow-button.avia-button {
    background-color: #a37652;
    color: white;
    border-radius: 10px;
}
}

I’m just not looking through in my css anymore. I’m afraid to make it worse
Can you please help me?

/* Header mobile */
@media only screen and (max-width: 767px) {
  .responsive #top #wrap_all #header {
    position: fixed;
  }
}
@media only screen and (max-width: 767px) {
.responsive #header_main .container {
    height: 50px !important;
}
.responsive .logo a {
    vertical-align: top !important;
}
.responsive .logo img {
    max-height: 50px !important;
}
}
@media only screen and (max-width: 767px) {
.responsive #top #wrap_all .main_menu {
    top: -15px;
    height: 45px;
    left: auto;
    right: 0;
    display: block;
    position: absolute;
}
}
@media only screen and (max-width: 500px) { 
.responsive #top #wrap_all #main {
        padding-top: 50px !important;
    }
}
/* Farbe Nachrichtenversand */
h3.avia-form-success{
 color:#99a502!important;	
}
/* Text mit Foto*/
.avia_textblock p img {
	  border-radius: 100%;
	  box-shadow: rgba(255, 255, 255, 0.6) 0px 0px 4px 4px;
}
.avia_textblock img.alignleft {
  margin-right: 40px;
margin-bottom: 20px;
}
@media only screen and (max-width: 767px) { 
#hello .avia_textblock img {
	width: 50%;
}
}
/* ScrollDown Pfeil */
#top .scroll-down-link {
	color: #a47654;
}
.html_header_transparency #top #main .caption_bottom .slideshow_caption {
    padding-top: 0;
}
}
@media only screen and (max-width: 767px) { 
	#top .caption_bottom .slideshow_caption .slideshow_inner_caption {
    position: relative;
    text-align: center;
}
#top .slideshow_inner_caption .avia-slideshow-button.avia-button {
	padding: 10px 6px;
	font-size: 10px;
}
}
.html_header_transparency #top #main .caption_bottom .slideshow_caption {
    padding-top: 0;
}
}
/* SlideShow Button Desktop*/
@media only screen and (min-width: 768px) { 
#top .caption_bottom .slideshow_caption .slideshow_inner_caption {
    position: relative;
    text-align: center;
}
#top .slideshow_inner_caption .avia-slideshow-button.avia-button {
    width: 500px;
    height: 56px;
    font-size: 22px;
}
@media only screen and (min-width: 768px) { 
.slideshow_inner_caption {
	top: -125px;
}
}
/* SlideShow Button Mobil */
@media only screen and (max-width: 767px) {
.home .avia-fullscreen-slider .caption_bottom .slideshow_caption {
    bottom: 250px;
}
.home .slideshow_inner_caption .avia-slideshow-button.avia-button {
    background-color: #a37652;
    color: white;
    border-radius: 10px;
}
}
/* SocialMedia Icons*/
#top #wrap_all .av-social-link-instagram:hover a, #top #wrap_all .av-social-link-instagram a:focus {
    color: #fff;
    background-color: #c82161;
}
.page-id-691 .av-masonry .av-masonry-date {
  display: none; 
}
.avia_start_animation .avia-icon-circles-inner {
  transition: all 0.2s cubic-bezier(0.175,0.885,0.320,1.275);
}
@media only screen and (max-width: 2500px) {
  #top #header.av_header_transparency .av-main-nav > li.menu-item  {
      display: none!important;
  }
  #top #header.av_header_transparency .av-burger-menu-main {
      cursor: pointer;
      display: block!important;
  }
}
.page-id-691 #after_section_2 {
  display: none; 
}

I think I have a lot of extra unneeded CSS code. Could you take a look and fix this for me?

.phone-info {
font-size: 30px;
}

#header_meta a, #header_meta span {
font-size:17px !important;
}

/* Sticky header on mobile */
@media only screen and (max-width: 767px) {
.responsive #top #main {
/* Margin top value should be equal to header height*/
margin-top: 130px;
}
.responsive #top #wrap_all #header {
position: fixed;
}
}

@media only screen and (max-width: 1200px) {
.av-main-nav > li.menu-item { display: none; }
.av-main-nav > li.menu-item-avia-special { display: block; }
}

.phone-info {
font-size: 18px;
}

@media only screen and (max-width: 479px) {
.responsive #top .slideshow_caption h2 {
font-size: 30px !important;
}

.responsive #top .slideshow_caption .avia-caption-content {
font-size: 8px !important;
line-height: 10px;
}

.avia-slideshow-inner, .avia-slideshow-inner li, .avia-slideshow-inner li img {
height: 20vh !important;
}
}

@media only screen and (max-width: 767px) {
#top #wrap_all #main .avia-section {
background-image: none !important;
}
}

.html_elegant-blog #top .post-entry .post-meta-infos,
.html_elegant-blog .avia-content-slider .slide-meta,
#top .news-time {
display: none;
}

html, body {
background-color: #04aef7 !important;
}

.page-id-2413 .slideshow_align_caption {
vertical-align: top;
}

@media only screen and (max-width: 767px) {
/* Add your Mobile Styles here */
.avia-slideshow li {
visibility: visible !important;
opacity: 1 !important;
}
}

I guess this is the code for the slideshow button on desktop, isn’t it?

@media only screen and (max-width: 450px) { 
.slideshow_inner_caption {
	top: -40px;
}
}
@media only screen and (min-width: 768px) { 
#top .caption_bottom .slideshow_caption .slideshow_inner_caption {
    position: relative;
    text-align: center;
}
#top .slideshow_inner_caption .avia-slideshow-button.avia-button {
    width: 500px;
    height: 56px;
    font-size: 22px;
}
@media only screen and (min-width: 768px) { 
.slideshow_inner_caption {
	top: -125px;
}
}
#top #wrap_all .slideshow_inner_caption .avia-slideshow-button.avia-button {
    background-color: #a37652;
    color: white;
    border-radius: 10px;
}
#top #wrap_all .slideshow_inner_caption .avia-slideshow-button.avia-button:hover {
    background-color: #c79a52;
    color: white;
    border-radius: 15px;
}

I would probably need it a second time for the second element?

thanks – with

function my_vars_outputs( $output ){
  $output .= "--my-variable-font-size-theme-h3: min(max(18px, calc(1.125rem + ((1vw - 3.2px) * 1.1864))), 32px); min-height: 0vw;\n";
  $output .= "--your-font-size-theme-h4: 20px;\n";
  return $output;
}
add_filter('avf_dynamic_css_additional_vars', 'my_vars_outputs');

it works – but with avf_dynamic_css_after_vars i can not see a change.

Edit:
This illustration may help you to better understand how to use it.

function my_vars_outputs( $output ){
$output .= "
  #myID {
        font-size: 28px; 
  } 
  .myClass {
        font-size: 20px; 
  } 
";
  return $output;
}
add_filter('avf_dynamic_css_after_vars', 'my_vars_outputs');

Edit: – ok now i see – but what benefit has that after_vars ?

Hi Rikard,

leider hat das so nicht funktioniert. Ich habe folgendes in Quick CSS eingetragen und es funktioniert. :-)

h3.slide-entry-title.entry-title {
font-size: 18px !important;
}

Viele Grüße, Petra

PS: Ich weiß zwar nicht, warum es mit !important” funktioniert, war einfach mal ein Versuch, da ich das irgendwoanders auch verwendet habe. )