body {
	margin: 0;
	padding: 0;
	color: #333;
	line-height: 30px;
	font-size: 20px;
	font-family: sans-serif;
	background-color: #E0E0E0;
}

#sutun {
	width: 90%;
	max-width: 800px;
	background-color: #EBEBEB;
	margin-top: 0;
	margin-right: auto;
	margin-bottom: 0;
	margin-left: auto;
	padding-left: 10px;
	padding-right: 5px;
}
h1  {
	padding: 35px 0 0 0;
	margin: 0;
	font-weight: bold;
	color: #3e3e3e;
	font-size: 40px;
	line-height: 50px;
}
h2  {
	padding-top: 10px;
	font-weight: bold;
	font-size: 30px;
	color: #383838;
	line-height: 40px;
}
h3  {
	font-weight: bold;
	font-size: 21px;
	background: #fff;
	padding: 16px;
	color: black;
	line-height: 31px;
}
#footer {
	color: #fff;
	padding: 20px 30px;
	font-size: 13px;
	text-align: center;
	background-color: #000000;
}


#giris{
	color: #333;
	padding: 20px 30px;
	font-size: 20px;
	text-align: center;
	background-color: #FFFFFF;
	line-height: 30px;
}


#cerceve  {
	color: #333;
	text-decoration: none;
	font-size: 18px;
	font-style: italic;
	line-height: 30px;
	background-color: #FAFAFA;
}

.youtube-preview {
  position: relative;
  width: 100%;
  max-width: 330px;
  aspect-ratio: 16 / 9;
  cursor: pointer;
  background-color: #000;
  margin: 20px auto;
}
.youtube-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}


/* PLAY BUTONU */
.youtube-preview::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80px; /* buton boyutu */
  height: 56px;
  transform: translate(-50%, -50%);
  background-image: url('images/youtube2.png'); /* şeffaf butonun yolu */
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  pointer-events: none;
}