*,
*::before,
*::after{
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
  font-family: Verdana, sans-serif;
  padding: 0;
  margin: 0;
}

:root{
  --color-bg: #333333;
  --color-bg-alt: #444444;
  --color-bg-alt-2: #232323;
  --color-primary: #dfdfdf;
  --color-secondary: #242424;
  --color-btn: #121212;
  --color-btn-active: #666666;
}

html{
  font-size: 62.5%;
}
body{
  font-size: 1.6rem;
  letter-spacing: 0.2px;
  background-color: var(--color-bg);
  color: var(--color-primary);
}
a{
  text-decoration: none;
  color: inherit;
}
ul{
  list-style: none;
}

/*NAVBAR***************************/
.navbar{
  top: 0;
  left: 0;
  width: 100%;
  padding: 0 15px;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
/*  border: 2px solid white;*/
}
.logo{
  padding: 10px 5px;
}
.navMenu{
  display: none;
}
.navflex{
  display: flex;
}
.navflex a{
  padding: 10px 20px;
  white-space: nowrap;
}
.navflex a:hover{
  background: var(--color-bg-alt);
}
.navbutton{
  background: var(--color-btn);
  padding: 5px;
}
.navbutton:active{
  background: var(--color-btn-active);
  color: #999999;
}

/*MAIN**************************/
main, .features, .collecting-info{
  max-width: 1024px;
  margin: auto;
  padding: 70px 15px;

/*  border: 2px solid white;*/
}
/*.collecting-info{
  max-width: 100%;
}*/

main{
/*  border: 2px solid white;*/
  display: flex;
  flex-flow: row nowrap;
  gap: 20px;
}
.main-1st{
/*  border: 2px solid white;*/
  margin: auto;
  flex-basis: 30%;
}
.main-1st h1{
  font-size: 2.8rem;
}
.main-1st *{
  margin-bottom: 20px;
}
form{
  display: flex;
}
input{
  padding: 5px;
  font-size: inherit;
}
button{
  border: none;
  font-size: inherit;
  background: var(--color-btn);
  color: inherit;
  padding: 5px;
}
button:active{
  background: var(--color-btn-active);
  color: #999999;
}
/*FEATURES*********************/
.features{
/*  border: 2px solid white;*/
  display: flex;
  flex-flow: row nowrap;
  gap: 20px;
}
.features *{
  margin-bottom: 10px;
}
.features section{
/*  border: 2px solid white;*/
  flex-basis: 25%;
}
.features a{
  font-weight: bolder;
}
svg{
  filter: invert(100%);
}
section svg{
  width: 4rem;
}
a svg{
/*  margin-bottom: 20px;*/
  width: 1rem;
}
/*collecting-info***************/
.collecting-info{
/*  border: 2px solid white;*/
  background: var(--color-bg-alt);
}
.collecting-info h2{
  font-size: 3rem;
}
.collecting-info *{
  margin-bottom: 15px;
}
.pseudo-image{
  height: 200px;
  background: var(--color-bg-alt-2);
}

/*MEDIA**************************/
@media all and (max-width: 500px){
  .navMenu{
    display: block;
    width: 2.5rem;
  }
  .navbar{
    display: flex;
  }
  .navflex,.navbutton{
    display: none;
  }
  
  main{
    display: block;
  }
  .features{
    display: block;
  }
  .features section{
    margin-bottom: 40px;
  }
  form{
    display: block;
  }
  input{
    width: 100%;
  }
  button{
    font-size: inherit;
    padding: 5px;
    width: 100%;
  }
  

}
@media all and (max-width: 650px) {
  .hide-c{
    display: none;
  }
  .features{
    display: block;
    gap: 10px;
  }
    
}
@media all and (max-width: 850px) {
  main{
    gap: 0;
  }
  .hide-d{
    display: none;
  }
  .features section{
    flex: auto;
  }
}

/*@media all and (min-width: 850px) {
}

@media all and (min-width: 1024px) {
}*/