/*GLOBAL STYLING*/
:root {
  /*Color Pallete*/
  --lightTheme_background: #bdc3c7;
  --lightTheme_foreground: #34495e;
  --darkTheme_background: #2c3e50;
  --darkTheme_foreground: #ecf0f1;

  /*Font Faces*/
  --RobotoSlab: "Roboto Slab", serif;
  --Nunito: "Nunito", sans-serif;

  /*current setting*/
  --curBG: var(--lightTheme_background);  
  --curFG: var(--lightTheme_foreground);
  --curBtnFG: white;
}

/* CONTENT STYLING */
body {
  background-color: var(--curBG);
  color: var(--curFG);
  font-family: var(--RobotoSlab);
  position: relative;
  text-align: center;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
header {
  margin-top: 15px;
}
h1 {
  width: 100%;
  height: auto;
  font-family: var(--RobotoSlab);
  font-weight: bold;
}
.container-fluid {
  display: grid;
  justify-items: center;
}
#invalidScreenSize {
  display: none;
  text-align: center;
  margin-top: 50px;
  font-size: 2em;
  color: #d63031;
}
button {
  background-color: var(--curFG);
  color: var(--curBG);
  font-weight: bold;
  border: 0px solid black;
  padding: 7px;
  border-radius: 5px;
}
button:hover {
  color: var(--curBtnFG);
}
button,
button:hover,
button:focus,
button:active {
  outline: none;
}
#help-btn {
  padding: 3px;
  background: transparent;
  color: var(--curFG);
  font-weight: 1000;
  font-family: var(--Nunito);
}
#help-btn:hover {
  text-decoration: underline;
}
#footer {
  width: 100%;
  font-family: var(--RobotoSlab);
}
p {
  font-size: 1.1em;
}
hr {
  background-color: var(--curFG);
  opacity: 0.4;
  width: 85%;
}
a#generate {
  color: var(--curBG);
}
a.special-link,
a#header-logo {
  color: var(--curFG);
}
a#header-logo:hover {
  text-decoration: none;
}
a#generate:hover {
  text-decoration: none;
  color: var(--curBtnFG);
}
main {
  flex: 1 0 0;
}
#errorModal {
  color: var(--lightTheme_foreground);
}
#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 90%;
}

/* screen size validation */
@media (max-width: 695px) {
  main {
    display: none;
  }
  #invalidScreenSize {
    display: block;
  }
}