@import url("https://fonts.googleapis.com/css2?family=Comfortaa:wght@400;700&family=Share+Tech+Mono&display=swap");

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Comfortaa", cursive;
}
:root {
  --background-color: #000911;
  --border-color: #556471;
  --font-color: #cfdce7;
  --primary-color: #24a2c2;
  --error-color: #ff0043;
}
body {
  background-color: var(--background-color);
  color: var(--font-color);
  height: 100vh;
  width: 100vw;
}
main {
  display: block;
  margin: auto;
  width: 70%;
  max-width: 700px;
  height: 80vh;
  padding-top: 50px;
}
header {
  padding-bottom: 20px;
}
h1 {
  font-size: 1.8em;
}
.flex {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}
.theme-btn {
  background-color: transparent;
  border: 1px solid var(--primary-color);
  border-radius: 5px;
  color: var(--font-color);
  padding: 8px;
  font-size: 0.7em;
  cursor: pointer;
  transition: 0.2s;
}
.theme-btn:hover {
  background-color: var(--primary-color);
  border: 1px solid var(--background-color);
  color: black;
  font-weight: bold;
  transition: 0.3s;
}
.text-input {
  width: 100%;
  min-width: 250px;
  background-color: transparent;
  color: var(--font-color);
  text-align: right;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  display: block;
  margin-top: 30px;
  padding: 10px;
  height: 50px;
  font-size: 1.6em;
}
.keys {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 1rem;
  margin: 2rem 0;
}
.keys button {
  background-color: var(--primary-color);
  border: none;
  font-size: 1.5em;
  border-radius: 5px;
  max-width: 15vw;
  cursor: pointer;
  height: 50px;
  min-width: 50px;
}
.keys button:hover {
  filter: brightness(0.6);
  transition: 0.3s;
}
footer {
  display: flex;
  width: 100%;
  min-width: 180px;
  max-width: 700px;
  height: 50px;
}
.results-input {
  background-color: transparent;
  color: var(--font-color);
  border: 1px solid var(--border-color);
  border-left: none;
  text-align: right;
  font-size: 1.6em;
  padding: 10px;
  display: block;
  margin: 0 auto;
  width: 80%;
  border-top-right-radius: 5px;
  border-bottom-right-radius: 5px;
}

.copy-btn {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--font-color);
  width: 20%;
  cursor: pointer;
  border-top-left-radius: 5px;
  border-bottom-left-radius: 5px;
}

.error {
  background-color: var(--error-color);
}
.copied {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

@media screen and (max-width: 600px) {
  .keys button {
    font-size: 1.2em;
  }
  h1 {
    padding-bottom: 15px;
  }
}