@import url("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,700;1,400&display=swap");
:root {
  --card-bg: rgba(215, 215, 215, 0.43);
  --cnt-clr: rgb(10, 61, 98);
  --btn-hover: rgb(74, 105, 189);
}

* {
  margin: 0;
  padding: 0;
  outline: 0;
}
body {
  font-family: "Roboto", Helvetica;
  background-color: #4158d0;
  background-image: linear-gradient(
    43deg,
    #4158d0 0%,
    #c850c0 46%,
    #ffcc70 100%
  );
  min-height: 100vh;
  background-size: 300%;
  background-position: left;
  animation: bg-animation 15s alternate infinite;
}
@keyframes bg-animation {
  0% {
    background-position: left;
  }
  100% {
    background-position: right;
  }
}
.container {
  width: 80%;
  margin-inline: auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-block: 1rem;
  padding: 1em;
}
#container-cell {
  grid-column: 3 /4;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  grid-template-rows: repeat(16, 1fr);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(5.6px);
  border: 1px solid rgba(215, 215, 215, 0.3);
  height: 35rem;
  width: 35rem;
}
.cell {
  border: 1px solid rgba(236, 236, 236, 0.46);
  backdrop-filter: blur;
  transition: background-color 0.2s ease-in;
}
#controller {
  background: var(--card-bg);
  border-radius: 20px;
  border-radius: 16px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(5.6px);
  -webkit-backdrop-filter: blur(5.6px);
  border: 1px solid rgba(215, 215, 215, 0.3);
  padding: 2em;
  color: var(--cnt-clr);
  text-align: center;
}
.btn {
  display: block;
  padding: 0.5em 1em;
  background: rgb(30, 55, 153);
  border: none;
  border-radius: 2px;
  width: 100%;
  cursor: pointer;
  margin-block: 1em;
  color: white;
  text-transform: uppercase;
  font-family: "Roboto", sans-serif;
  transition: background 0.1s ease-in-out;
}
.btn:hover {
  background: var(--btn-hover);
}
#size {
  width: 100%;
}
.r-btn {
  display: flex;
  align-items: center;
  margin-block: 0.5em;
}
.pg-title {
  font-size: 3rem;
  margin-block: 1rem;
  text-align: center;
  color: rgb(12, 36, 97);
  filter: drop-shadow(0.2rem 0.2rem 0.2rem rgb(248, 194, 145));
}
/* 
#modal {
  padding: 1em;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(5.6px);
  -webkit-backdrop-filter: blur(5.6px);
  border: 1px solid rgba(215, 215, 215, 0.3);

} */
:modal {
  position: absolute;
  text-align: left;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 16px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10.8px);
  -webkit-backdrop-filter: blur(10.8px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 1em 2em;
  color: var(--cnt-clr);
  top: 50%;
  right: 50%;
  transform: translate(70%, -50%);
}