html {
  font-size: 62.5%;
  --color-dark: rgba(0, 0, 50);
  --color-light: rgba(255, 255, 240);
  --color-white: white;
  --color-red: #ff6161;
  --color-grayred: #d7cccc;
  --color-green: #2c835a;
  font-family: 'Merienda', cursive;
}

body {
  height: 100vh;
  padding: 0.8rem;
  margin: 0;
  box-sizing: border-box;
  overflow: hidden;
}

body > * {
  box-sizing: inherit;
}

.hidden {
  display: none;
}

.menu {
  display: flex;
  justify-content: center;
  flex-direction: column;
  width: min(100%, 30rem);
  margin: auto;
  padding-top: 40vh;
}

.menu__button {
  overflow: hidden;
  text-transform: uppercase;
  font-family: 'Merienda', cursive;
  position: relative;
  border: none;
  padding: 2.4rem;
  padding-left: 4.8rem;
  text-align: left;
  cursor: pointer;
  border-radius: 0.4rem;
  font-size: 2.4rem;
  color: var(--color-dark);
  background: none;
  z-index: 1;
  background: url(./static/brush.svg);
  background-size: 80% 100%;
  background-repeat: no-repeat;
  transition: color 0.2s;
}

.menu__button:focus {
  outline: none;
}

.menu__button:focus,
.menu__button:hover {
  color: var(--color-white);
}

.menu__button::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 100%;
  background-color: var(--color-white);
  transform: translateX(-6rem);
  clip-path: polygon(
    100% 100%,
    6% 99%,
    1% 95%,
    6% 92%,
    2% 90%,
    4% 87%,
    6% 84%,
    9% 83%,
    4% 81%,
    3% 80%,
    2% 77%,
    8% 76%,
    13% 75%,
    9% 73%,
    3% 70%,
    8% 67%,
    4% 64%,
    10% 60%,
    3% 58%,
    8% 53%,
    3% 51%,
    8% 47%,
    11% 42%,
    6% 40%,
    2% 38%,
    7% 32%,
    3% 29%,
    9% 23%,
    1% 18%,
    7% 16%,
    3% 10%,
    0% 0%,
    100% 0%
  );
  z-index: -1;
  transition: transform 0.4s, background-color 0.8s;
}

.menu__button:focus:after,
.menu__button:hover::after {
  transform: translateX(25rem);
  background-color: transparent;
}

/* CELLS */
.game {
  max-width: fit-content;
  display: grid;
  transform-origin: top;
  grid-template-areas:
    '. col'
    'row game';
  grid-template-columns: auto 1fr;
  margin: auto;
  padding-top: 10rem;
  transition: transform 0.1s;
}

.rowHelpers {
  grid-area: row;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}

.rowHelper {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: flex-end;
}

.columnHelpers {
  grid-area: col;
  display: flex;
  justify-content: space-around;
}

.columnHelper {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
}

.number {
  font-weight: bold;
  font-size: 2.4rem;
  margin: 0.8rem;
}

.rowHelper .number:last-child {
  margin-right: 1.6rem;
}

.board {
  display: grid;
  grid-area: game;
  gap: 0.8rem;
  grid-template-columns: repeat(4, 1fr);
}

.cell {
  border: 1px solid rgba(0, 0, 0, 0.1);
  overflow: hidden;
  position: relative;
  box-sizing: border-box;
  box-shadow: 0.2rem 0.2rem 0.8rem rgba(0, 0, 0, 0.1);
  width: 10rem;
  cursor: pointer;
  aspect-ratio: 1;
  border-radius: 0.4rem;
  transition: filter 0.1s, transform 0.1s;
}

.cell:focus,
.cell:hover {
  transform: scale(1.05);
  outline: none;
}

.cell:focus {
  border: 1px solid var(--color-red);
}

.unknown:focus {
  border: 1px solid var(--color-dark);
}

.checked {
  background: #404040;
  box-shadow: inset 5px 5px 10px #353535, inset -5px -5px 10px #4b4b4b;
}

.unknown {
  background: var(--color-red);
  box-shadow: 0.2rem 0.2rem 0.8rem rgba(165, 65, 65, 0.2);
}

.solved {
  opacity: 0.5;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backdrop-filter: blur(2px) brightness(70%);
  z-index: 2;
  transition: backdrop-filter 1s;
}

.modal__body {
  position: relative;
  background-color: white;
  width: fit-content;
  border-radius: 0.4rem;
  margin: auto;
  margin-top: 25vh;
  padding: 4.8rem;
  padding-bottom: 2.4rem;
  box-shadow: 1rem 2rem 2rem rgba(0, 0, 0, 0.2);
}

.modal__header {
  text-align: center;
  margin: 0;
  font-size: 2.4rem;
  margin-bottom: 1.6rem;
}

.modal__text {
  text-align: center;
  font-size: 1.6rem;
  font-family: sans-serif;
  margin-bottom: 4.8rem;
}

.modal__buttons {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.6rem;
}

.modal__button {
  cursor: pointer;
  padding: 0.8rem 1.6rem;
  border-radius: 0.4rem;
  border: none;
  font-weight: bold;
}

.modal__button:hover,
.modal__button:focus {
  outline: none;
  transform: translateY(-0.1rem);
  filter: brightness(120%);
  transition: all 0.2s;
}

.modal__button--secondary {
  background: none;
  margin-right: 0.8rem;
}

.modal__input {
  font-weight: bold;
  padding-left: 0;
  padding: 0.8rem 1.6rem;
  margin: 0.8rem;
  border: none;
  border-bottom: 2px solid lightgray;
}

.modal__input:focus {
  outline: none;
}

.modal__time {
  color: var(--color-green);
  font-weight: bold;
}

.modal__button--secondary:hover,
.modal__button--secondary:focus {
  color: var(--color-green);
}

.modal__button--primary {
  color: var(--color-white);
  background-color: var(--color-green);
}

.modal__button--exit {
  position: absolute;
  right: 0.8rem;
  top: 0.8rem;
  color: gray;
  background: none;
}

.modal__button--exit:hover,
.modal__button--exit:focus {
  color: var(--color-green);
}

/* BOARD SELECTOR */

.boardSelector {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: 1fr;
}

.boardSelector__board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 50rem;
  height: 50rem;
}

.boardSelector__cell {
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 5%;
  margin: 5%;
  box-shadow: 0.2rem 0.2rem 0.8rem rgba(0, 0, 0, 0.1);
  aspect-ratio: 1/1;
}

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

.boardSelector__button {
  border: none;
  box-shadow: 0.2rem 0.2rem 0.8rem rgba(0, 0, 0, 0.1);
  border-radius: 0.4rem;
  font-size: 1.6rem;
  width: 3.2rem;
  height: 3.2rem;
  background-color: var(--color-grayred);
  cursor: pointer;
  transition: all 0.2s;
  margin: 0.2rem;
}

.boardSelector__button:hover,
.boardSelector__button:focus {
  outline: none;
  transform: translateY(-0.1rem);
  filter: brightness(110%);
}

.boardSelector__button:active {
  transform: translateY(0);
  box-shadow: none;
  filter: brightness(90%);
}

.level {
  display: grid;
  grid-template-columns: auto auto auto;
  align-items: center;
  padding: 0.8rem;
  font-size: 1.6rem;
  grid-gap: 2.4rem;
  transition: all 0.2s;
  border-radius: 0.4rem;
}

.level:hover {
  cursor: pointer;
  transform: translateY(-1px);
  background-color: var(--color-green);
  color: var(--color-white);
}

.level button {
  border: none;
  font-weight: bold;
  padding: 0.8rem 1.6rem;
  border-radius: 0.4rem;
  cursor: pointer;
  opacity: 0;
  transition: all 0.2s;
}

.level:hover button {
  opacity: 1;
}

.level button:hover {
  background-color: var(--color-red);
}

.submenu {
  display: flex;
  flex-direction: column;
  width: 24rem;
  position: fixed;
  top: 0;
  left: 0;
  background-image: linear-gradient(
    to right,
    var(--color-white) 50%,
    transparent
  );
  padding-left: 2.4rem;
  height: 100vh;
  padding-top: 10vh;
}

.submenu button {
  margin: 0.4rem;
  padding: 0.8rem 1.6rem;
  border: none;
  font-weight: bold;
  font-family: 'Merienda';
  text-transform: uppercase;
  background: none;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 2rem;
  text-align: left;
  z-index: 10;
}

.submenu button:hover {
  transform: scale(1.1);
}