:root {
  --grass-a: #2f8a3a;
  --grass-b: #49a747;
  --grass-c: #1f6d32;
  --dirt-a: #7b5132;
  --dirt-b: #5c3924;
  --panel: rgba(22, 27, 22, 0.82);
  --text: #f5ffe9;
  --muted: #cfe3bf;
  --line: rgba(255, 255, 255, 0.18);
}

* {
  box-sizing: border-box;
}

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

body {
  color: var(--text);
  font-family: "Segoe UI", system-ui, sans-serif;
  cursor: none;
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.08) 25%, transparent 25%) 0 0 / 42px 42px,
    linear-gradient(-45deg, rgba(0, 0, 0, 0.09) 25%, transparent 25%) 0 0 / 36px 36px,
    linear-gradient(135deg, var(--grass-a), var(--grass-b) 52%, var(--grass-c));
  transition: background 600ms ease;
}

body.dirt {
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.06) 25%, transparent 25%) 0 0 / 44px 44px,
    linear-gradient(-45deg, rgba(0, 0, 0, 0.16) 25%, transparent 25%) 0 0 / 31px 31px,
    linear-gradient(135deg, var(--dirt-a), #8c603c 48%, var(--dirt-b));
}

.hud {
  position: relative;
  z-index: 10;
  min-height: 100%;
  padding: 24px;
  pointer-events: none;
}

.status {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
}

.label,
.scorebox span {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(30px, 6vw, 72px);
  line-height: 0.95;
  text-shadow: 0 3px 0 rgba(0, 0, 0, 0.25);
}

.scorebox {
  min-width: 126px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--panel);
  text-align: right;
}

.scorebox strong {
  display: block;
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  line-height: 1;
}

.panel,
.leaderboard {
  width: min(390px, calc(100vw - 48px));
  margin-top: 24px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--panel);
  pointer-events: auto;
}

.panel h2,
.leaderboard h2 {
  margin-bottom: 10px;
  font-size: 18px;
}

.panel p {
  color: var(--muted);
  margin-bottom: 14px;
}

form {
  display: grid;
  gap: 10px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

input,
button {
  min-height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: var(--text);
  background: rgba(0, 0, 0, 0.32);
  font: inherit;
}

input {
  padding: 0 12px;
}

button {
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: rgba(255, 255, 255, 0.12);
}

.leaderboard {
  position: absolute;
  left: 24px;
  bottom: 24px;
}

ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 24px;
}

li {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

li strong {
  color: var(--text);
}

#arena,
.creeper,
#cursor-dot,
#explosion {
  position: fixed;
  left: 0;
  top: 0;
  pointer-events: none;
}

.creeper {
  width: 54px;
  height: 74px;
  transform: translate3d(-100px, -100px, 0);
  filter: drop-shadow(0 8px 0 rgba(0, 0, 0, 0.2));
  z-index: 3;
}

#cursor-dot {
  width: 18px;
  height: 18px;
  border: 2px solid #fff;
  border-radius: 50%;
  z-index: 20;
  transform: translate3d(-100px, -100px, 0);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.2);
}

#explosion {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  opacity: 0;
  z-index: 8;
  background: radial-gradient(circle, #fff6a8 0 20%, #ff9f1a 21% 43%, #5b2b16 44% 100%);
}

#explosion.boom {
  animation: boom 680ms ease-out forwards;
}

@keyframes boom {
  0% {
    opacity: 1;
    transform: translate3d(var(--x), var(--y), 0) scale(0.4);
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--x), var(--y), 0) scale(18);
  }
}

@media (max-width: 680px) {
  .hud {
    padding: 16px;
  }

  .status {
    align-items: stretch;
  }

  .scorebox {
    min-width: 104px;
  }

  .leaderboard {
    left: 16px;
    bottom: 16px;
    width: calc(100vw - 32px);
  }
}