* {
  margin: 0;
  padding: 0;
  text-decoration: none;
  list-style: none;
}
/* main button */
.button {
  font-size: 17px;
  font-family: inherit;
  height: 50px;
  width: 150px;
  border: none;
  background-color: #ffff;
  cursor: pointer;
}
.button:active {
  background-color: #ffffffd5;
  height: 45px;
  width: 145px;
  margin: 2.5px;
  font-size: 16px;
}
body {
  background-color: #232323;
  font-family: "Press Start 2P", cursive;
  color: #ffff;
  height: 100vh;
}
header {
  display: flex;
  justify-content: space-between;
  margin: 20px;
  min-height: 50px;
  overflow: hidden;
}
header p {
  font-size: 12px;
}
@media (max-width: 500px) {
  header p {
    font-size: 9px;
  }
}
h1 {
  text-align: center;
  margin: 35px auto;
  line-height: 2;
}
.container {
  width: 100%;
  position: relative;
}
.number {
  display: block;
  width: 90px;
  background-color: #fff;
  color: #232323;
  margin: auto;
  font-size: 60px;
  text-align: center;
  padding: 20px;
}
.container::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 5px;
  background-color: #fff;
  z-index: -1;
}
main {
  display: flex;
  flex-wrap: wrap-reverse;
  justify-content: space-evenly;
  margin: 50px;
  gap: 30px;
}
main .myform {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 230px;
  flex-direction: column;
  gap: 20px;
}
main .myform .num {
  background-color: transparent;
  outline: none;
  border: 3px solid #fff;
  height: 75px;
  width: 150px;
  color: #fff;
  font-size: 40px;
  font-family: inherit;
  text-align: center;
  padding: 0 15px;
}
.right {
  display: flex;
  flex-direction: column;
  gap: 80px;
}
.right .hint {
  max-width: 320px;
  line-height: 1.5;
}
.right ul {
  margin-left: 30px;
}
.right ul li:first-child {
  margin-bottom: 20px;
}
.right ul li i {
  position: absolute;
  margin: -1px 0 0 -30px;
}

/* fireworks animation */
.pyro {
  display: none;
}
.pyro > .before, .pyro > .after {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  box-shadow: -120px -218.66667px blue, 248px -16.66667px #00ff84, 190px 16.33333px #002bff, -113px -308.66667px #ff009d, -109px -287.66667px #ffb300, -50px -313.66667px #ff006e, 226px -31.66667px #ff4000, 180px -351.66667px #ff00d0, -12px -338.66667px #00f6ff, 220px -388.66667px #99ff00, -69px -27.66667px #ff0400, -111px -339.66667px #6200ff, 155px -237.66667px #00ddff, -152px -380.66667px #00ffd0, -50px -37.66667px #00ffdd, -95px -175.66667px #a6ff00, -88px 10.33333px #0d00ff, 112px -309.66667px #005eff, 69px -415.66667px #ff00a6, 168px -100.66667px #ff004c, -244px 24.33333px #ff6600, 97px -325.66667px #ff0066, -211px -182.66667px #00ffa2, 236px -126.66667px #b700ff, 140px -196.66667px #9000ff, 125px -175.66667px #00bbff, 118px -381.66667px #ff002f, 144px -111.66667px #ffae00, 36px -78.66667px #f600ff, -63px -196.66667px #c800ff, -218px -227.66667px #d4ff00, -134px -377.66667px #ea00ff, -36px -412.66667px #ff00d4, 209px -106.66667px #00fff2, 91px -278.66667px #000dff, -22px -191.66667px #9dff00, 139px -392.66667px #a6ff00, 56px -2.66667px #0099ff, -156px -276.66667px #ea00ff, -163px -233.66667px #00fffb, -238px -346.66667px #00ff73, 62px -363.66667px #0088ff, 244px -170.66667px #0062ff, 224px -142.66667px #b300ff, 141px -208.66667px #9000ff, 211px -285.66667px #ff6600, 181px -128.66667px #1e00ff, 90px -123.66667px #c800ff, 189px 70.33333px #00ffc8, -18px -383.66667px #00ff33, 100px -6.66667px #ff008c;
  -moz-animation: 1s bang ease-out infinite backwards, 1s gravity ease-in infinite backwards, 5s position linear infinite backwards;
  -webkit-animation: 1s bang ease-out infinite backwards, 1s gravity ease-in infinite backwards, 5s position linear infinite backwards;
  -o-animation: 1s bang ease-out infinite backwards, 1s gravity ease-in infinite backwards, 5s position linear infinite backwards;
  -ms-animation: 1s bang ease-out infinite backwards, 1s gravity ease-in infinite backwards, 5s position linear infinite backwards;
  animation: 1s bang ease-out infinite backwards, 1s gravity ease-in infinite backwards, 5s position linear infinite backwards; }

.pyro > .after {
  -moz-animation-delay: 1.25s, 1.25s, 1.25s;
  -webkit-animation-delay: 1.25s, 1.25s, 1.25s;
  -o-animation-delay: 1.25s, 1.25s, 1.25s;
  -ms-animation-delay: 1.25s, 1.25s, 1.25s;
  animation-delay: 1.25s, 1.25s, 1.25s;
  -moz-animation-duration: 1.25s, 1.25s, 6.25s;
  -webkit-animation-duration: 1.25s, 1.25s, 6.25s;
  -o-animation-duration: 1.25s, 1.25s, 6.25s;
  -ms-animation-duration: 1.25s, 1.25s, 6.25s;
  animation-duration: 1.25s, 1.25s, 6.25s; }

@-webkit-keyframes bang {
  from {
    box-shadow: 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white; } }
@-moz-keyframes bang {
  from {
    box-shadow: 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white; } }
@-o-keyframes bang {
  from {
    box-shadow: 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white; } }
@-ms-keyframes bang {
  from {
    box-shadow: 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white; } }
@keyframes bang {
  from {
    box-shadow: 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white, 0 0 white; } }
@-webkit-keyframes gravity {
  to {
    transform: translateY(200px);
    -moz-transform: translateY(200px);
    -webkit-transform: translateY(200px);
    -o-transform: translateY(200px);
    -ms-transform: translateY(200px);
    opacity: 0; } }
@-moz-keyframes gravity {
  to {
    transform: translateY(200px);
    -moz-transform: translateY(200px);
    -webkit-transform: translateY(200px);
    -o-transform: translateY(200px);
    -ms-transform: translateY(200px);
    opacity: 0; } }
@-o-keyframes gravity {
  to {
    transform: translateY(200px);
    -moz-transform: translateY(200px);
    -webkit-transform: translateY(200px);
    -o-transform: translateY(200px);
    -ms-transform: translateY(200px);
    opacity: 0; } }
@-ms-keyframes gravity {
  to {
    transform: translateY(200px);
    -moz-transform: translateY(200px);
    -webkit-transform: translateY(200px);
    -o-transform: translateY(200px);
    -ms-transform: translateY(200px);
    opacity: 0; } }
@keyframes gravity {
  to {
    transform: translateY(200px);
    -moz-transform: translateY(200px);
    -webkit-transform: translateY(200px);
    -o-transform: translateY(200px);
    -ms-transform: translateY(200px);
    opacity: 0; } }
@-webkit-keyframes position {
  0%, 19.9% {
    margin-top: 10%;
    margin-left: 40%; }

  20%, 39.9% {
    margin-top: 40%;
    margin-left: 30%; }

  40%, 59.9% {
    margin-top: 20%;
    margin-left: 70%; }

  60%, 79.9% {
    margin-top: 30%;
    margin-left: 20%; }

  80%, 99.9% {
    margin-top: 30%;
    margin-left: 80%; } }
@-moz-keyframes position {
  0%, 19.9% {
    margin-top: 10%;
    margin-left: 40%; }

  20%, 39.9% {
    margin-top: 40%;
    margin-left: 30%; }

  40%, 59.9% {
    margin-top: 20%;
    margin-left: 70%; }

  60%, 79.9% {
    margin-top: 30%;
    margin-left: 20%; }

  80%, 99.9% {
    margin-top: 30%;
    margin-left: 80%; } }
@-o-keyframes position {
  0%, 19.9% {
    margin-top: 10%;
    margin-left: 40%; }

  20%, 39.9% {
    margin-top: 40%;
    margin-left: 30%; }

  40%, 59.9% {
    margin-top: 20%;
    margin-left: 70%; }

  60%, 79.9% {
    margin-top: 30%;
    margin-left: 20%; }

  80%, 99.9% {
    margin-top: 30%;
    margin-left: 80%; } }
@-ms-keyframes position {
  0%, 19.9% {
    margin-top: 10%;
    margin-left: 40%; }

  20%, 39.9% {
    margin-top: 40%;
    margin-left: 30%; }

  40%, 59.9% {
    margin-top: 20%;
    margin-left: 70%; }

  60%, 79.9% {
    margin-top: 30%;
    margin-left: 20%; }

  80%, 99.9% {
    margin-top: 30%;
    margin-left: 80%; } }
@keyframes position {
  0%, 19.9% {
    margin-top: 10%;
    margin-left: 40%; }

  20%, 39.9% {
    margin-top: 40%;
    margin-left: 30%; }

  40%, 59.9% {
    margin-top: 20%;
    margin-left: 70%; }

  60%, 79.9% {
    margin-top: 30%;
    margin-left: 20%; }

  80%, 99.9% {
    margin-top: 30%;
    margin-left: 80%; } }