remove unused mat.css

src/styles/mat.css

-#root {
-  margin: 0 auto;
-  text-align: center;
-}
-
-:root {
-  --perspective: 800px;
-  --scale: 1.35;
-  --board-rotate-z: 20deg;
-  --block-width: calc(80px * var(--scale));
-  --block-height: calc(80px * var(--scale));
-  --block-column-gap: calc(10px * var(--scale));
-  --block-row-gap: calc(10px * var(--scale));
-  --card-w-l-ratio: calc(5.9 / 8.6);
-  --deck-offset-x: calc(90px * var(--scale));
-  --deck-offset-y: calc(45px * var(--scale));
-  --deck-rotate-z: 30deg;
-  --opponent-deg: 180deg;
-  --hand-rotate: calc(var(--board-rotate-z) * -1);
-  --highlight-interval: 800ms;
-  --highlight-color-x: #393;
-  --highlight-color-y: #6f6;
-}
-
-button {
-  border-radius: 8px;
-  border: 1px solid transparent;
-  padding: 0.6em 1.2em;
-  font-size: 1em;
-  font-weight: 500;
-  font-family: inherit;
-  cursor: pointer;
-  transition: border-color 0.25s;
-}
-button:hover {
-  border-color: #646cff;
-}
-button:focus,
-button:focus-visible {
-  outline: 4px auto -webkit-focus-ring-color;
-}
-
-#controller {
-  position: fixed;
-  display: flex;
-  gap: 20px;
-  bottom: 20px;
-  right: 20px;
-  z-index: 999;
-}
-
-#life-bar-container {
-  position: fixed;
-  display: flex;
-  gap: 20px;
-  top: 20px;
-  right: 20px;
-  font-size: 1.5em;
-  font-weight: 500;
-  font-family: inherit;
-  flex-direction: column;
-}
-
-#life-bar {
-  padding: 0.8em 1.6em;
-  background-color: #a9a9a9;
-  border-radius: 8px;
-  text-align: left;
-  border: 1px solid transparent;
-  color: black;
-  opacity: 0.4;
-}
-
-#camera {
-  perspective: var(--perspective);
-  transform-style: preserve-3d;
-}
-#board {
-  perspective-origin: center center;
-  transform: translateX(0) translateY(0) translateZ(0)
-    rotateX(var(--board-rotate-z));
-  transform-style: preserve-3d;
-  position: relative;
-}
-.card {
-  position: absolute;
-  left: 0;
-  top: 0;
-  --trans-time: 0.3s;
-  transition: var(--trans-time);
-  aspect-ratio: var(--card-w-l-ratio);
-  background-color: skyblue;
-  background: var(--card-img);
-  background-size: cover;
-  height: var(--block-height);
-  --x-margin-left: calc(
-    var(--c) * calc(var(--block-width) + var(--block-column-gap))
-  );
-  --x-padding: calc(
-    (var(--block-width) - var(--block-height) * var(--card-w-l-ratio)) / 2
-  );
-  --x: calc(var(--x-margin-left) + var(--x-padding));
-  --y: calc(var(--r) * calc(var(--block-height) + var(--block-row-gap)));
-  --z: calc(var(--h) * 1px);
-  transform: translateZ(var(--z)) rotateX(calc(var(--hand-rotate) * var(--vertical))) scale(var(--scale-focus));
-  translate: var(--x) var(--y);
-  rotate: calc(var(--opponent-deg) * (1 - var(--vertical)));
-  transform-style: preserve-3d;
-  z-index: 10;
-  animation: glow calc(var(--highlight-interval) * var(--highlight-on)) ease-out
-    infinite alternate;
-}
-
-.card-defense {
-  --height: var(--block-width);
-  height: calc(var(--height));
-  --x-margin-left: calc(
-    var(--c) * calc(var(--block-width) + var(--block-column-gap))
-  );
-  --x-padding: calc(
-    (var(--block-width) - var(--height) * var(--card-w-l-ratio)) / 2
-  );
-  --y-margin-top: calc(
-    var(--r) * calc(var(--block-height) + var(--block-row-gap))
-  );
-  --y-padding: calc((var(--block-height) - var(--height)) / 2);
-  --x: calc(var(--x-margin-left) + var(--x-padding));
-  --y: calc(var(--y-margin-top) + var(--y-padding));
-  --z: calc(var(--h) * 1px);
-  transform: translateZ(var(--z));
-  translate: var(--x) var(--y);
-  rotate: calc(90deg + var(--opponent-deg));
-  animation: glow calc(var(--highlight-interval) * var(--highlight-on)) ease-out
-    infinite alternate;
-}
-
-.card::after {
-  z-index: 9;
-  /* opacity: var(--shadow); */
-  content: "";
-  position: absolute;
-  left: 0;
-  top: 0;
-  width: 100%;
-  height: 100%;
-  background-color: #0000003f;
-  filter: blur(5px);
-  transform: translateZ(calc(-1 * var(--z)));
-}
-
-.card:hover {
-  animation: glow-hover var(--highlight-interval) ease-out infinite alternate;
-}
-
-.block {
-  width: var(--block-width);
-  height: var(--block-height);
-  /* background-color: #333; */
-  cursor: pointer;
-  animation: glow calc(var(--highlight-interval) * var(--highlight-on)) ease-out
-    infinite alternate;
-}
-
-.block-extra {
-  margin-left: calc(var(--block-width) + var(--block-column-gap));
-}
-
-.block-row {
-  display: flex;
-  gap: var(--block-column-gap);
-}
-
-.block-left {
-  margin-left: calc((var(--block-width) + var(--block-column-gap)) * -1);
-}
-
-.block-right {
-  margin-right: calc((var(--block-width) + var(--block-column-gap)) * -1);
-}
-
-#board-bg {
-  display: flex;
-  flex-direction: column;
-  gap: var(--block-row-gap);
-  transform-style: preserve-3d;
-}
-
-@keyframes animation-fly {
-  0% {
-    transform: translateZ(1px);
-  }
-  50% {
-    transform: translateZ(80px);
-  }
-  100% {
-    transform: translateZ(1px);
-  }
-}
-
-@keyframes animation-fly-shadow {
-  0% {
-    transform: translateZ(0px);
-    /* background-color: #00000000; */
-  }
-  50% {
-    transform: translateZ(-80px);
-    /* background-color: #00000063; */
-  }
-  100% {
-    transform: translateZ(0px);
-    /* background-color: #00000000; */
-  }
-}
-
-.fly {
-  --trans-time: 0.3s;
-  animation: animation-fly var(--trans-time);
-  z-index: 10;
-}
-
-.fly::after {
-  --trans-time: 0.3s;
-  z-index: 9;
-  opacity: 1;
-  content: "";
-  position: absolute;
-  left: 0;
-  top: 0;
-  width: 100%;
-  height: 100%;
-  background-color: #00000063;
-  filter: blur(5px);
-  animation: animation-fly-shadow var(--trans-time) ease-out;
-}
-
-@keyframes glow {
-  0% {
-    border-color: var(--highlight-color-x);
-    box-shadow: 0 0 5px rgba(0, 255, 0, 0.2), inset 0 0 5px rgba(0, 255, 0, 0.1),
-      0 1px 0 #393;
-  }
-  100% {
-    border-color: var(--highlight-color-y);
-    box-shadow: 0 0 20px rgba(0, 255, 0, 0.6),
-      inset 0 0 10px rgba(0, 255, 0, 0.4), 0 1px 0 #6f6;
-  }
-}
-
-@keyframes glow-hover {
-  0% {
-    border-color: #cbcc24;
-    box-shadow: 0 0 5px rgba(255, 255, 0, 0.2),
-      inset 0 0 5px rgba(255, 255, 0, 0.1), 0 1px 0 #cbcc24;
-  }
-  100% {
-    border-color: #f0f224;
-    box-shadow: 0 0 20px rgba(255, 255, 0, 0.6),
-      inset 0 0 10px rgba(255, 255, 0, 0.4), 0 1px 0 #f0f224;
-  }
-}