HTMLify

@import url('https://fonts.googleapis.com/css?family=Open+Sans&display=swap');

:root {
  --error-color: #dc3545;
  --success-color: #28a745;
  --warning-color: #ffc107;
}

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

body {
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
  background-color: #19172e;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 1em;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
  width: 90%;
  text-align: center;
  display: flex;
  color: #fff;
  flex-direction: column;
  align-items: center;
  flex-wrap: wrap;

}

h1 {
  margin-bottom: 20px;
}

#errorBox {
  color: crimson;
}

.gallery img {
  width: 18vw;
  height: 18vh;
  object-fit: cover;
}

.inp-box {
  text-transform: uppercase;
  width: 250px;
  height: 45px;
  outline: none;
  border: none;
  margin: 20px 0;
  padding: 10px;
  font-size: 18px;
  border-radius: 3px;
  background-color: white;
  transition: all 300ms ease;
}

.btn {
  text-transform: uppercase;
  width: 250px;
  height: 45px;
  outline: none;
  border: none;
  margin: 20px 0;
  font-size: 18px;
  border-radius: 3px;
  background-color: white;
  cursor: pointer;
  transition: all 300ms ease;
}

.btn:hover {
  color: #fff;
  background-color: #5c1ed5;
  cursor: pointer;
}

.btn:focus {
  outline: none;
}

footer {
  color: pink;
  font-size: 1rem;
  padding: 22px;
  line-height: 3vh;
  margin-top: 30px;
}

footer a {
  color: inherit;
}

footer a:visited {
  color: inherit;
}