* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  color: #fff;
}

body {
  color: black;
  background: #000;
}

header {
  background: #fff;
  color: #000;
  padding: 10px;
  width: 100%;
  z-index: 99;

}


section {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 100vh;
  flex-direction: column;
  padding: 0 100px;
}

p {
  display: block;
  margin: 25px 0;
  font-size: 2vw;
  font-family: 'Helvetica';
  font-weight: 10;
}

a {
  display: block;
  margin: 25px 0;
  font-family: 'Helvetica';
  font-size: 2vw;
  font-weight: 100;
  text-decoration: none;
}

h1 {
  display: block;
  margin-bottom: 25px;
  text-align: center;
  font-size: 50px;
  font-family: 'Helvetica';
  font-weight: 10;

  color: #fff; 
}

.section-bg {
  z-index: -1;
  position: fixed;
  top: 0%;
  left: 0%;
  height: 100%;
  width: 100%;
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0;
}

#welcome .section-bg {
  opacity: 1;
}

.section-bg:before {
  content: "";
  background: #000;
  opacity: 0.5;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.section-1-bg {
  background-image: url("iz.JPG");
/*  background-image: url("IMG_6426.jpeg");*/
}

.section-2-bg {
  background-image: url("IMG_6587.jpeg");
}

.section-3-bg {
  background-image: url("IMG_6426.jpeg");
/*  background-image: url("IMG_6588.jpeg");*/
}

.section-4-bg {
  background-image: url("IMG_5537.jpg");
}