* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
}

body {
  background: #05070d;
  color: white;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  overflow: hidden;
  cursor: none;
}

:root {
  --block: min(2.5vw, 20px);
  --gap: calc(var(--block) * 0.25);
}

#bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: radial-gradient(
      60vmax 60vmax at 95% 92%,
      rgba(180, 40, 40, 0.36),
      transparent 62%
    ),
    radial-gradient(
      60vmax 60vmax at 5% 92%,
      rgba(180, 40, 40, 0.28),
      transparent 62%
    ),
    radial-gradient(
      120vmax 45vmax at 50% 112%,
      rgba(160, 35, 35, 0.16),
      transparent 75%
    );
}

#bg::before {
  content: "";
  position: absolute;
  inset: -45%;
  background: radial-gradient(
      100vmax 100vmax at 95% 110%,
      rgba(150, 35, 35, 0.18),
      transparent 75%
    ),
    radial-gradient(
      100vmax 100vmax at 5% 110%,
      rgba(150, 35, 35, 0.16),
      transparent 75%
    );
  animation: breathe2 60s ease-in-out infinite;
}

#bg::after {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(
      80vmax 80vmax at 90% 95%,
      rgba(230, 70, 70, 0.3),
      transparent 70%
    ),
    radial-gradient(
      80vmax 80vmax at 10% 95%,
      rgba(230, 70, 70, 0.22),
      transparent 70%
    ),
    radial-gradient(
      140vmax 55vmax at 50% 120%,
      rgba(190, 50, 50, 0.26),
      transparent 75%
    );
  animation: breatheFlow 30s ease-in-out infinite;
}

@keyframes breatheFlow {
  0% {
    transform: translateY(0) scale(1);
    opacity: 0.9;
  }
  50% {
    transform: translateY(1.8vh) scale(1.08);
    opacity: 0.95;
  }
  100% {
    transform: translateY(0) scale(1);
    opacity: 0.9;
  }
}

@keyframes breathe2 {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.04);
  }
  100% {
    transform: scale(1);
  }
}

#app {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-bottom: env(safe-area-inset-bottom);
}

#clock {
  display: flex;
}

#fact {
  margin-top: 20px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
}

#cursor {
  position: fixed;
  top: 0;
  left: 0;

  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);

  pointer-events: none;
  z-index: 999;
}

.digit-grid {
  display: grid;
  grid-template-columns: repeat(5, var(--block));
  grid-template-rows: repeat(7, var(--block));
  gap: var(--gap);
  margin: 0 calc(var(--block) * 0.6);
}

.block {
  width: var(--block);
  height: var(--block);
  background: transparent;
}

.block.on {
  background: #7fdcff;
  box-shadow: 0 0 6px rgba(127, 220, 255, 0.4);
}

.colon-grid {
  display: grid;
  grid-template-columns: var(--block);
  grid-template-rows: repeat(7, var(--block));
  gap: var(--gap);
  margin: 0 calc(var(--block) * 0.8);
  transform: translateY(calc(var(--block) * 0.6));
}

.colon-grid .block.on {
  opacity: 0.88;
}

.digit-grid,
.colon-grid {
  transition: opacity 0.25s ease-out, transform 0.25s ease-out;
}

.enter {
  opacity: 0;
  transform: translateY(calc(var(--block) * -0.4));
}

#fact {
  transition: opacity 0.4s ease;
  color: rgba(200, 210, 220, 0.55);
}

#fact.fade-out {
  opacity: 0;
}

#hint {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(4px);
  z-index: 20;
  cursor: pointer;
}

@media (hover: none) and (pointer: coarse) {
  #cursor {
    display: none;
  }

  body {
    cursor: default;
  }
}

html,
body {
  touch-action: none;
}