:root {
  background-color: #ecf5ff;
  font-size: 62.5%;
}

* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
}

h1,
h2,
h3,
h4 {
  margin-bottom: 1rem;
}

h1 {
  font-size: 5.4rem;
  color: #56a5eb;
  margin-bottom: 5rem;
}

h1 > span {
  font-size: 2.4rem;
  font-weight: 500;
}

h2 {
  font-size: 4.2rem;
  margin-bottom: 4rem;
  font-weight: 700;
}

h3 {
  font-size: 2.8rem;
  font-weight: 500;
}

/* UTILITIES */

.container {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 80rem;
  margin: 0 auto;
  padding: 2rem;
}

.container > * {
  width: 100%;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

.flex-center {
  justify-content: center;
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.text-center {
  text-align: center;
}

.hidden {
  display: none;
}

/* BUTTONS */
.btn {
  font-size: 1.8rem;
  padding: 1rem 0;
  width: 20rem;
  text-align: center;
  border: 0.1rem solid #56a5eb;
  margin-bottom: 1rem;
  text-decoration: none;
  color: #56a5eb;
  background-color: white;
}

.btn:hover {
  cursor: pointer;
  box-shadow: 0 0.4rem 1.4rem 0 rgba(86, 185, 235, 0.5);
  transform: translateY(-0.1rem);
  transition: transform 150ms;
}

.btn[disabled]:hover {
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* FORMS */
form {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

input {
  margin-bottom: 1rem;
  width: 20rem;
  padding: 1.5rem;
  font-size: 1.8rem;
  border: none;
  box-shadow: 0 0.1rem 1.4rem 0 rgba(86, 185, 235, 0.5);
}

input::placeholder {
  color: #aaa;
}

/* AI Game Maker shell */
:root { background-color: #f2ece0; }
*, input { font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; color: #16120b; }
h1 { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: #16120b; text-transform: uppercase; letter-spacing: -0.02em; font-size: 4.6rem; }
h2, h3 { color: #16120b; }
.btn {
  border: 1px solid #16120b;
  color: #f2ece0;
  background: #16120b;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.4rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 1.2rem 0;
  box-shadow: 4px 4px 0 #16120b;
  transition: background 120ms;
}
.btn:hover {
  background: #dd4f1b;
  border-color: #dd4f1b;
  box-shadow: 4px 4px 0 #16120b;
  transform: none;
}
input { border: 1px solid #16120b; box-shadow: 4px 4px 0 #16120b; }