body {
  background-color: #333;
  margin: 0;
  color: black;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: 'Sen', sans-serif;
}

.container {
  background-image: linear-gradient(to right, red, rgb(255, 255, 6));
  padding: 3rem;
  border-radius: 1rem;
  border: 2px solid black;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  font-family: 'Sen', sans-serif;
}

.form {
  display: grid;
  grid-template-columns: auto auto;
  row-gap: 1rem;
  column-gap: 3rem;
  justify-content: center;
  align-items: center;
}

.title {
  margin: 0;
  text-align: center;
}

label {
  font-weight: bold;
}

.character-amount-container {
  display: flex;
  align-items: center;
}

.number-input {
  width: 2rem;
  color: green;
  font-weight: bold;
  font-family: 'Sen', sans-serif;
}

.password-display {
  background-color: white;
  color: black;
  padding: 1rem;
  border: 5px solid #333;
  height: 2rem;
  width: 350px;
  display: flex;
  justify-content: center;
  align-items: center;
  word-break: break-all;
  border-radius: .5rem;
  font-size: 25px;
}
.btn-12,
.btn-12 *,
.btn-12 :after,
.btn-12 :before,
.btn-12:after,
.btn-12:before {
  border: 0 solid;
  box-sizing: border-box;
}

.btn-12 {
  -webkit-tap-highlight-color: transparent;
  background-color: #000;
  background-image: none;
  color: #fff;
  cursor: pointer;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans, sans-serif,
    Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
  font-size: 100%;
  font-weight: 900;
  line-height: 1.5;
  margin: 0;
  -webkit-mask-image: -webkit-radial-gradient(#000, #fff);
  padding: 0;
  text-transform: uppercase;
}

.btn-12:disabled {
  cursor: default;
}

.btn-12:-moz-focusring {
  outline: auto;
}

.btn-12 svg {
  display: block;
}

.btn-12 [hidden] {
  display: none;
}

.btn-12 {
  border-radius: 99rem;
  border-width: 2px;
  overflow: hidden;
  padding: 0.8rem 3rem;
  position: relative;
}

.btn-12 span {
  mix-blend-mode: difference;
}

.btn-12:after,
.btn-12:before {
  background: linear-gradient(
    90deg,
    #fff 25%,
    transparent 0,
    transparent 50%,
    #fff 0,
    #fff 75%,
    transparent 0
  );
  content: "";
  inset: 0;
  position: absolute;
  transform: translateY(var(--progress, 100%));
  transition: transform 0.2s ease;
}

.btn-12:after {
  --progress: -100%;
  background: linear-gradient(
    90deg,
    transparent 0,
    transparent 25%,
    #fff 0,
    #fff 50%,
    transparent 0,
    transparent 75%,
    #fff 0
  );
  z-index: -1;
}

.btn-12:hover:after,
.btn-12:hover:before {
  --progress: 0;
}
/* === removing default button style ===*/
.button {
  margin: 0;
  height: auto;
  background: transparent;
  padding: 0;
  border: none;
}

/* button styling */
.button {
  --border-right: 6px;
  --text-stroke-color: rgba(255,255,255,0.6);
  --animation-color: black;
  --fs-size: 2em;
  letter-spacing: 3px;
  text-decoration: none;
  font-size: var(--fs-size);
  font-family: "Arial";
  position: relative;
  text-transform: uppercase;
  color: transparent;
  -webkit-text-stroke: 1px var(--text-stroke-color);
}
/* this is the text, when you hover on button */
.hover-text {
  position: absolute;
  box-sizing: border-box;
  content: attr(data-text);
  color: var(--animation-color);
  width: 0%;
  inset: 0;
  border-right: var(--border-right) solid var(--animation-color);
  overflow: hidden;
  transition: 0.5s;
  -webkit-text-stroke: 1px var(--animation-color);
}
/* hover */
.button:hover .hover-text {
  width: 100%;
  filter: drop-shadow(0 0 23px var(--animation-color))
}