@import url('https://fonts.googleapis.com/css?family=Raleway:300,400,500,600'); /* used 400 and 500? DELETE? */

* {
    box-sizing: border-box; 
    margin: 0;
    padding: 0;   
  }
  
html, 
body {
  height: 100%;
  font-family: 'Raleway', sans-serif;   
}

a {
  text-decoration: none;
  color: inherit; 
}

a:hover,
a:active {
  text-decoration: underline;
  }

.wrapper {
  min-height: 100%;
  position: relative;
}

.top-header {
  position: fixed;
  top: 0;
  z-index: 100;
  width: 100%;
  height: 0.5rem;
  background-color: rgba(25,25,25, 0.8);
  border-bottom: 1px solid rgb(126, 126, 126);
  color: rgb(233, 233, 233);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;  
  align-items: center;
}

/* ************ HAMBURGER MENU: **************** */

.collapsible-menu {
  display: none;
  width: 100%;  
  background-color: rgba(26, 26, 26, 0.8);
  color: rgb(233, 233, 233);
  padding: 3rem 1rem 0 1rem;
}

.collapsible-menu ul {
  list-style-type: none;
  padding: 0;
}

.collapsible-menu a {
  display: block;
  padding: 0.5rem;
  text-decoration: none;
}

.collapsible-menu label {
  display: block;
  cursor: pointer; 
  /* background: url(menu.png) no-repeat left center; - NOT USED */
  padding: 10px 0 10px 50px;
}

.m-menu__content {
  max-height: 0;
  overflow: hidden;
  padding: 0 0 0 50px;
}

input#m-menu {
  display: none;
}

input:checked ~ label {
  background-image: url("../img/close4+.png");
  background-repeat: no-repeat;
  background-position: right;
  background-size: 25px;
}

input:checked ~ .m-menu__content {
  max-height: 100%;
}

/* *************** up from here: hamburger menu **************** */

.header__logo {
  font-variant: small-caps;
  font-size: 2rem;  
  font-weight: 500;
}

.logo-link:hover {
  text-decoration: none;
  transform: scale(1.05);
}

.navbar__items {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}

.navbar__item {
  margin: 0 0.75rem;      
}

.logo {
  align-self: flex-start;
}

.home {
  position: relative;
}

.home__img {
  background-image: url("../img/bg-mountains.jpg");
  background-size: cover;
  background-position: top center;
  position: relative;
  z-index: -1;
  top: 0;
  width: 100%;
  height: 100vh;   
  overflow: hidden;
}

.img-mountain {  
  position: relative;  
  top: 0;
  overflow: hidden;
  height: 100%;
  background-position-x: center;
  background-position-y: center;
}

.home__name {
  position: absolute;
  top: 30%;
  left: 11%;
  font-size: 6rem;
  font-weight: 500;
  font-variant: small-caps;
  color:  rgb(20,20,20);
  text-shadow: 2px 2px 2px rgb(99, 99, 99);
}

.home__quote {
  position: absolute;
  top: 60%;
  left: 10%;
  width: 80%;
  font-size: 2rem;
  color: rgb(233, 233, 233);
  background-color: rgba(59, 59, 59, 0.4);
  padding: 1rem;
}

.main {     
  position: relative; 
  font-size: 1.3rem;
  line-height: 1.5;
}

.main--headings {
  font-size: 3rem;
  text-shadow: 2px 2px 2px rgb(99, 99, 99);
  font-weight: 500;
  padding-bottom: 1rem;
}

.main__about {
  position: relative; 
  padding: 3rem 10% 2rem 10%;
  z-index: 10;
  background-color: rgb(225, 244, 255);
  background-image: url("../img/networks-sv.jpg");
  background-size: cover;
  background-position: 100%;
  color: rgb(10, 10, 10);
  border-top: 1px solid rgb(126, 126, 126);
  border-bottom: 1px solid rgb(126, 126, 126);
}

.main__about--text {
  padding-top: 1rem;  
  text-align: justify;
}

.main__about--items {
  list-style-type: none;
  padding-top: 1rem;
}

.main__about--items-heading {
  text-decoration: underline;
  font-weight: 500;
}

.main__about--item {
  padding-left: 4rem;
}

.main__portfolio {
  padding: 3rem 10% 2rem 10%;
  background-color: rgb(54, 54, 54);
  color: white;
}

.main__portfolio--items {
  display: flex;
  flex-wrap: wrap;  
}

.main__portfolio--item {
  flex: 0 1 calc(100% / 3 - 4%);
  border: solid rgb(104, 104, 104) 1px;
  border-radius: 2%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  margin: 2%;
  color: black;
  transition: all 0.2s;
}

.main__portfolio--item:hover {
  transform: translateY(-2px) scale(1.02);
}

.text--link {
  text-shadow: 1px 1px 1px rgba(59, 59, 59, 0.6);
}

.portfolio--item--image--holder {
  background-color: black;
  width: 100%;
  position: relative;
  overflow: hidden;  
}

.portfolio--item--image--holder::after {  
  content: "";
  display: block;
  padding-top: 68.89%;   /* images 1260x868px => 868/1260=0.688889   */
} 

.portfolio--item--image {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  /* border-bottom: solid rgb(105, 105, 105) 2px; */
}

.portfolio--item--header {
  flex-grow: 1;
  text-align: center;
  font-size: 1.3rem;
  padding: 0.5rem;
  background-color: white;
}

.portfolio--item--text {
  flex-grow: 1;
  text-align: center;
  font-size: 0.9rem;
  line-height: 1.2;
  padding: 0 1rem 0.5rem 1rem;
  background-color: white;  
}

.portfolio--item--link {
  flex-grow: 0;
  text-align: center;
  font-size: 0.8rem;
  line-height: 1.2;
  padding: 0.3rem 1rem 0.3rem 1rem;
  background-color: rgb(255, 255, 255); 
  border-top: 1px solid  rgba(80, 80, 165, 0.3); 
}

.project--link {
  color: rgb(80, 80, 165);
  text-shadow: 1px 1px 1px rgba(59, 59, 59, 0.6);
  font-size: 0.8rem;
}

.portfolio--item--tech {
   background-color: rgb(104, 104, 104);
   color: white;
   font-size: 0.9rem;
   text-align: center;
   padding: 7px;
/*    border-bottom: solid rgb(105, 105, 105) 2px; */
}

.main__contact {
  padding: 3rem 10% 2rem 10%;
  background-color: rgb(255, 255, 255);
  color: black;
  background-image: url("../img/sit3-neg-bar-2.jpg");
  background-size: cover;
  padding-bottom: 10%;
   border-top: 1px solid rgb(126, 126, 126);
  border-bottom: 1px solid rgb(126, 126, 126);
  
}

.footer {
  background-color: rgba(25,25,25, 0.8);
  border-top: 1px solid rgb(126, 126, 126);
  color: rgb(233, 233, 233);   
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  text-align: center;   
  padding-top: 0.7rem;
  padding-bottom: 0.7rem; 
}

@media (max-width: 850px) {  
  .main__portfolio--item {
    flex: 0 1 calc(100% / 2 - 4%);
  }

  .navbar__item:last-of-type {
    margin: 0 0rem;      
  }
}

@media (max-width: 510px) {
  .navbar__items {
    display: none;
  }

  .collapsible-menu {
    display: block;
  }

  .home__name {
    font-size: 3rem;
    top: 20%;
    left: 8%;
  }

  .home__quote {
    font-size: 1.25rem;
    top: 50%;
    left: 8%;
  }

	.main {
		font-size: 1rem;
  	line-height: 1.2;
	}
		
	.main__about,
	.main__portfolio, 
	.main__contact {
		padding: 2rem 5% 1rem 5%;
	}	

  .main__contact {
		padding-bottom: 20%;
	}

	.main--headings {
    font-size: 2rem;
    padding-bottom: 1rem;
  }
	
  .main__portfolio--items {
    flex-direction: column;
  }

  .main__portfolio--item {
    flex: 0 1 50%;
    margin-bottom: 10%;
  }
}