amp-ad.css

/**
 * Force the layout box of the ad iframe to be exactly as big as the actual
 * iframe. The `amp-ad` tag itself can be freely styled.
 */
amp-ad iframe,
amp-embed iframe {
  border: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  position: relative;
}

.i-amphtml-ad-default-holder {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(200, 200, 200, 0.05);
}

.i-amphtml-ad-default-holder:after {
  content: 'Ad';
  content: attr(data-ad-holder-text);
  background-color: transparent;
  border-radius: 2px;
  color: #696969;
  font-size: 10px;
  line-height: 1;
  font-family: Arial, sans-serif;
  padding: 3px 4px 1px;
  border: 1px, solid, #696969;
}

amp-ad[sticky] {
  visibility: hidden;
  align-items: center;
}

amp-ad[type='adsense'],
amp-ad[type='doubleclick'] {
  direction: ltr;
}

amp-ad[data-a4a-upgrade-type='amp-ad-network-doubleclick-impl'] > iframe,
amp-ad[data-a4a-upgrade-type='amp-ad-network-adsense-impl'] > iframe {
  min-height: 0;
  min-width: 0;
}

amp-ad[data-a4a-upgrade-type='amp-ad-network-doubleclick-impl'][height='fluid']
  > iframe {
  height: 100% !important;
  width: 100% !important;
  position: relative;
}

amp-ad[data-a4a-upgrade-type='amp-ad-network-doubleclick-impl'][height='fluid'] {
  width: 100% !important;
}

amp-ad .amp-ad-close-button {
  position: absolute;
  visibility: visible;
  width: 28px;
  height: 28px;
  right: 0;
  background-image: url('data:image/svg+xml;charset=utf-8,<svg width="13" height="13" viewBox="341 8 13 13" xmlns="http://www.w3.org/2000/svg"><path fill="#4F4F4F" d="M354 9.31L352.69 8l-5.19 5.19L342.31 8 341 9.31l5.19 5.19-5.19 5.19 1.31 1.31 5.19-5.19 5.19 5.19 1.31-1.31-5.19-5.19z" fill-rule="evenodd"/></svg>');
  background-size: 13px 13px;
  background-position: 9px center;
  background-color: #fff;
  background-repeat: no-repeat;
  box-shadow: 0 -1px 1px 0 rgba(0, 0, 0, 0.2);
  border: none;
  border-radius: 12px 0 0 0;
}

/* Increase tapping area of the dismiss button */
amp-ad .amp-ad-close-button:before {
  position: absolute;
  content: '';
  top: -20px;
  right: 0;
  left: -20px;
  bottom: 0;
}

amp-ad[sticky='bottom'] .amp-ad-close-button,
amp-ad[sticky='bottom-right'] .amp-ad-close-button,
amp-ad[sticky='left'] .amp-ad-close-button,
amp-ad[sticky='right'] .amp-ad-close-button {
  top: -28px;
}

amp-ad[sticky='top'] .amp-ad-close-button {
  transform: rotate(270deg);
  bottom: -28px;
}

amp-ad[sticky='left'] .amp-ad-close-button {
  transform: rotate(90deg);
  left: 0;
}

[dir='rtl'] amp-ad .amp-ad-close-button {
  right: auto;
  left: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 12px;
  background-position: 6px center;
}

[dir='rtl'] amp-ad .amp-ad-close-button:before {
  right: -20px;
  left: 0;
}

amp-ad[sticky] {
  z-index: 11;
  position: fixed;
  overflow: visible !important;
  box-shadow: 0 0 5px 0 rgba(0, 0, 0, 0.2) !important;
  display: flex;
  flex-direction: column;
}

amp-ad[sticky='top'] {
  width: 100% !important;
  max-height: 20% !important;
  background: #fff;
  padding-bottom: 5px;
}

amp-ad[sticky='bottom'] {
  max-width: 100%;
  width: 100% !important;
  max-height: 20% !important;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: #fff;
  bottom: 0;
  padding-top: 4px;
}

amp-ad[sticky='bottom-right'] {
  bottom: 0;
  right: 0;
}

amp-ad[sticky='left'],
amp-ad[sticky='right'] {
  background: #fff;
}

amp-ad[sticky='left'] iframe,
amp-ad[sticky='right'] iframe {
  max-width: 120px !important;
}

amp-ad[sticky='left'] {
  left: 0;
}

amp-ad[sticky='right'] {
  right: 0;
}

/**
  * Enforce no left/right sticky ads if not on a wide screen
  */
@media (max-width: 1024px) {
  amp-ad[sticky='left'],
  amp-ad[sticky='right'] {
    display: none !important;
  }
}