:root {
  color-scheme: dark;
  font-family:
    "Asimovian", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: #05010d;
  color: #f8fbff;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #05010d;
  touch-action: none;
  user-select: none;
}

#gameCanvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100vw;
  height: 100vh;
  display: block;
}

.ui {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.screen {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: clamp(18px, 4vw, 34px);
  padding: 24px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 42%, rgb(0 255 255 / 0.12), transparent 34%),
    radial-gradient(circle at 45% 50%, rgb(255 0 170 / 0.10), transparent 44%),
    linear-gradient(180deg, rgb(3 0 14 / 0.25), rgb(3 0 14 / 0.72));
  pointer-events: auto;
}

.screen.is-visible {
  display: flex;
}

.titleBlock {
  display: grid;
  gap: 10px;
  max-width: min(760px, 92vw);
}

.kicker {
  margin: 0;
  color: #71fff0;
  font-size: clamp(0.75rem, 2.5vw, 0.95rem);
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-shadow: 0 0 18px rgb(0 255 255 / 0.85);
}

h1,
h2 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(3.2rem, 13vw, 8.8rem);
  line-height: 0.9;
  letter-spacing: 0;
  text-transform: uppercase;
  text-shadow:
    0 0 12px rgb(0 255 255 / 0.95),
    0 0 30px rgb(255 0 170 / 0.75),
    0 0 72px rgb(255 76 0 / 0.45);
}

h2 {
  font-size: clamp(3.4rem, 15vw, 8rem);
}

.subtitle {
  max-width: 620px;
  margin: 0 auto;
  color: #e8fcff;
  font-size: clamp(1rem, 3.1vw, 1.3rem);
  line-height: 1.45;
  text-shadow: 0 0 14px rgb(0 255 255 / 0.45);
}

.primaryButton {
  min-width: 168px;
  min-height: 52px;
  border: 1px solid rgb(113 255 240 / 0.95);
  border-radius: 8px;
  padding: 0 30px;
  background:
    linear-gradient(90deg, rgb(0 255 255 / 0.20), rgb(255 0 170 / 0.22)),
    rgb(7 10 25 / 0.78);
  color: #ffffff;
  box-shadow:
    0 0 0 1px rgb(255 255 255 / 0.12) inset,
    0 0 24px rgb(0 255 255 / 0.45),
    0 0 42px rgb(255 0 170 / 0.22);
  cursor: pointer;
  font: inherit;
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.primaryButton:active {
  transform: translateY(1px) scale(0.99);
}

.controls {
  display: grid;
  gap: 7px;
  color: rgb(232 252 255 / 0.82);
  font-size: clamp(0.78rem, 2.8vw, 0.96rem);
  line-height: 1.35;
}

.hud {
  position: fixed;
  top: max(14px, env(safe-area-inset-top));
  left: max(14px, env(safe-area-inset-left));
  right: max(14px, env(safe-area-inset-right));
  display: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  max-width: 520px;
  pointer-events: none;
}

body.is-playing .hud {
  display: grid;
}

.hud div {
  min-width: 0;
  border: 1px solid rgb(0 255 255 / 0.24);
  border-radius: 8px;
  padding: 8px 10px;
  background: rgb(4 7 18 / 0.42);
  box-shadow: 0 0 20px rgb(0 255 255 / 0.12) inset;
  backdrop-filter: blur(8px);
}

.hud span {
  display: block;
  color: rgb(173 248 255 / 0.75);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hud strong {
  display: block;
  margin-top: 2px;
  color: #fff;
  font-size: clamp(1rem, 3vw, 1.35rem);
  line-height: 1;
  text-shadow: 0 0 13px rgb(0 255 255 / 0.7);
}

.warning {
  position: fixed;
  left: 50%;
  bottom: max(22px, env(safe-area-inset-bottom));
  display: none;
  width: min(92vw, 390px);
  transform: translateX(-50%);
  border: 1px solid rgb(255 54 84 / 0.65);
  border-radius: 8px;
  padding: 10px 14px;
  background: rgb(53 0 17 / 0.34);
  color: #ffeff3;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-shadow: 0 0 16px rgb(255 54 84 / 0.9);
  box-shadow: 0 0 24px rgb(255 30 80 / 0.18);
}

.warning.is-visible {
  display: block;
  animation: dangerPulse 0.42s infinite alternate;
}

.levelBanner {
  position: fixed;
  left: 50%;
  top: 48%;
  display: none;
  transform: translate(-50%, -50%);
  color: #ffffff;
  font-size: clamp(2rem, 9vw, 5rem);
  font-weight: 950;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
  text-shadow:
    0 0 16px rgb(0 255 255 / 0.85),
    0 0 38px rgb(255 0 170 / 0.65);
}

.levelBanner.is-visible {
  display: block;
  animation: bannerFlash 1.2s ease both;
}

.pauseOverlay {
  position: fixed;
  left: 50%;
  top: 50%;
  display: none;
  transform: translate(-50%, -50%);
  color: #ffffff;
  font-size: clamp(2.8rem, 12vw, 7rem);
  font-weight: 950;
  letter-spacing: 0.12em;
  text-align: center;
  text-transform: uppercase;
  text-shadow:
    0 0 16px rgb(0 255 255 / 0.85),
    0 0 42px rgb(255 0 170 / 0.75);
  pointer-events: none;
}

body.is-paused .pauseOverlay {
  display: block;
}

@keyframes dangerPulse {
  from {
    opacity: 0.72;
    transform: translateX(-50%) scale(0.99);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) scale(1.02);
  }
}

@keyframes bannerFlash {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.86);
  }

  18%,
  72% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }

  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.12);
  }
}

@media (max-width: 680px) {
  .hud {
    max-width: none;
  }

  .hud div {
    padding: 7px 8px;
  }
}