* {
  margin: 0;
  padding: 0;
}

/* a pixelated, monospaced font, similar to ones used in early video games */
@font-face {
  font-family: monogram;
  src: url(monogram.ttf);
}

body {
  line-height: 0.8; /* Adjusted for solving a line spacing problem with the monogram font in Firefox */
}

html {
  height: 100%;
  margin: 0;
  background: url("../images/deskog.png") no-repeat center center fixed,
        radial-gradient(circle at center, rgba(100,150,80,0.5) 0%, rgba(100,150,80,0.5) 33%, rgba(100,150,80,0) 35%, rgba(100,150,80,0) 100%),
        linear-gradient(to bottom, #000000 0%, #005533 49%, #000000 50%, #009900 100%);
  background-attachment: fixed;
  background-size: cover;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
@keyframes moveTowardsHorizon {
  0% {
    transform: translateY(50vh); /* Start in the middle */
    opacity: 0;
    animation-timing-function: cubic-bezier(0, 0, 1, 0); /* this sets the speed that creates the perspective effect */
  }
  100% {
    transform: translateY(100vh);
    opacity: 1;
  }
}
.line {
  position: fixed;
  left: 0; /* Ensures the line starts from the very left edge */
  width: 100%;
  height: 4px; /* the height for the thickness of the line */
  background: #77ff00;
  animation: moveTowardsHorizon 16s infinite linear;
}
/* Different starting points using negative animation-delays */
.line:nth-child(1) {
  animation-delay: 0s;
}
.line:nth-child(2) {
  animation-delay: -1s;
}
.line:nth-child(3) {
  animation-delay: -2s;
}
.line:nth-child(4) {
  animation-delay: -3s;
}
.line:nth-child(5) {
  animation-delay: -4s;
}
.line:nth-child(6) {
  animation-delay: -5s;
}
.line:nth-child(7) {
  animation-delay: -6s;
}
.line:nth-child(8) {
  animation-delay: -7s;
}
.line:nth-child(9) {
  animation-delay: -8s;
}
.line:nth-child(10) {
  animation-delay: -9s;
}
.line:nth-child(11) {
  animation-delay: -10s;
}
.line:nth-child(12) {
  animation-delay: -11s;
}
.line:nth-child(13) {
  animation-delay: -12s;
}
.line:nth-child(14) {
  animation-delay: -13s;
}
.line:nth-child(15) {
  animation-delay: -14s;
}
.line:nth-child(16) {
  animation-delay: -15s;
}

/* near 1:1 aspect ratio view */
.main {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.info {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  height: 9vw;
  width: 85vmax;
  background-color: #00000000;
}

.square {
  display: flex;
  width: 50vmax;
  height: 50vmax;
  margin: 0 auto;
  position: relative; /* This is necessary for the absolute positioning of the cannon to work */
}
/* landscape view */
@media (min-aspect-ratio: 1.45) {
  .main {
    display: flex;
    flex-direction: row;
    justify-content: center;
  }
  .info {
    display: flex;
    flex-direction: column;
    justify-content:flex-start;
    width: 16vw;
    height: 96vh;
  }
  .square {
    display: flex;
    width: 96vmin;
    height: 96vmin;
  }
}

/* portrait view */
@media (max-aspect-ratio: 0.98) {
  .main {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .info {
    display: flex;
    height: 12vw;
    width: 98vw;
  }
  .square {
    display: flex;
    width: 78vmin;
    height: 78vmin;
  }
}

p {
  font-size: 5vmin;
  font-family: monogram, Courier, monospace;
  color: white;
  padding: 1vh;
  text-align: center;
  /* add a glow to the text */
  text-shadow: 0 0 12px #fff;
}

.mask-text {
  /* creates a scanline effect, appropriate to an early video game display */
  -webkit-mask-image: repeating-linear-gradient(#ffffff99 2px, black 6px);
  mask-image: repeating-linear-gradient(#ffffff99 2px, black 6px);
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
}

.scoreboard-container {
  font-size: 4vmin;
  font-family: monogram, Courier, monospace;
  color: white;
  padding: 1vh;
  text-align: left;
  -webkit-mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
  text-shadow: 0 0 12px #fff;
}
form {
  font-family: monogram, Courier, monospace;
  color: white;
  width: 100%;
  padding-left: 27vmin;
}
input[type="text"] {
  font-family: monogram, Courier, monospace;
  color: white;
  background-color: #000000aa;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding-left: 4vmin;
  width: 40%;
  font-size: 6vmin;
}
input[type="text"]::placeholder {
  color: #888;
  font-size: 6vmin; 
}
.square .cannonShot {
  position: absolute;
  height: 2%;
  transform: translateX(-50%);
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  /* add a glow to the images */
  filter: drop-shadow(0 0 3px #fff);
}
.square .alienShot {
  position: absolute;
  height: 2%;
  transform: translateX(-50%);
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  /* add a glow to the images */
  filter: drop-shadow(0 0 3px #fff);
}
.square .lowAlien {
  position: absolute;
  height: 10%;
  transform: translateX(-50%);
}
.square .pop {
  position: absolute;
  height: 14%;
  transform: translate(-50%, 10%);
  /*image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  -webkit-mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
  filter: drop-shadow(0 0 3px #fff);*/
}

.cannon {
  clip-path: polygon(50% 0%, 65% 10%, 70% 30%, 75% 20%, 85% 20%, 90% 70%, 100% 80%, 90% 80%, 85% 100%, 75% 100%, 70% 80%, 65% 100%, 55% 100%, 50% 80%, 45% 100%, 35% 100%, 30% 80%, 25% 100%, 15% 100%, 10% 80%, 0% 80%, 10% 70%, 15% 20%, 25% 20%, 30% 30%, 35% 10%);
  background: rgba(180, 255, 150, 0.6);
}

.explosion {
  z-index: 10; /* Ensure it appears above other elements */
  /*image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  -webkit-mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
  filter: drop-shadow(0 0 3px #fff);*/
}

.start-message {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1000;
  font-size: 5vmin;
  font-family: monogram, Courier, monospace;
  color: white;
  padding: 1vh;
  text-align: center;
  -webkit-mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
  /* add a glow to the text */
  text-shadow: 0 0 12px #fff;
}

.modal-overlay {
  position: fixed; /* Use fixed positioning to ensure the modal stays in view */
  top: 50%; /* Position the modal vertically at the center of the viewport */
  left: 50%; /* Position the modal horizontally at the center of the viewport */
  width: 97vmin;
  height: 52vmin;
  transform: translate(
    -50%,
    -80%
  );
  z-index: 9999; /* Ensure the modal appears above other content */
  background-color: rgba(0, 0, 0, 0.80); /* Semi-transparent background */
  padding: 10px; /* Add padding to the modal */
  border-radius: 12%;
}

.game-over-message {
  font-family: monogram, Courier, monospace;
  font-size: 27vmin;
  color: white;
  text-align: left;
  padding-left: 3vmin;
  background-color: #33333300;
  /* adds a scanline effect to the GAME OVER message */
  -webkit-mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  mask-image: repeating-linear-gradient(#ffffff77 2px, black 6px);
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
  text-shadow: 0 0 12px #fff;
}

button {
  display: flex;
  justify-content: center;
  margin: 50px auto;
  padding: 5px;
  font-family: monogram;
  font-size: 50px;
  width: 280px;
  height: 60px;
  cursor: pointer;
  border-radius: 15px;
  border-color: #fff;
  color: #fff;
  background-color: transparent;
}

#restart-btn {
  position: absolute;
  top: calc(100% + 10px); /* Position the button below the message */
  left: 50%; /* Align the button horizontally */
  transform: translateX(-50%); /* Center the button horizontally */
  max-width: 40%; /* Reduce the size of the image */
}