:root {
  color-scheme: dark;
  --ink: #f4efe2;
  --muted: #b7b0a0;
  --panel: rgba(20, 23, 26, 0.82);
  --line: rgba(255, 255, 255, 0.16);
  --amber: #f2b84b;
  --teal: #2ee0c1;
  --red: #ff5f5f;
  --blue: #6da7ff;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #0b0e12;
  color: var(--ink);
}

button {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  background: linear-gradient(180deg, #f8c96d, #e89a38);
  color: #1b1308;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 12px 18px;
  text-transform: uppercase;
  letter-spacing: 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.34);
}

button:hover,
button:focus-visible {
  filter: brightness(1.08);
}

button:disabled {
  cursor: not-allowed;
  filter: grayscale(0.7) brightness(0.72);
  opacity: 0.64;
}

.shell {
  position: relative;
  display: grid;
  width: 100vw;
  height: 100vh;
  place-items: center;
  background:
    radial-gradient(circle at 50% 44%, rgba(46, 224, 193, 0.12), transparent 34%),
    linear-gradient(180deg, #111820, #080a0d 74%);
}

#game {
  width: 100vw;
  height: 100vh;
  display: block;
  image-rendering: auto;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 26px;
  padding: 32px;
  background:
    linear-gradient(90deg, rgba(8, 10, 13, 0.88), rgba(8, 10, 13, 0.44)),
    radial-gradient(circle at 58% 45%, rgba(242, 184, 75, 0.18), transparent 34%);
  z-index: 5;
}

.hidden {
  display: none;
}

.hud {
  position: absolute;
  top: 14px;
  left: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.meter {
  min-width: 82px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(12, 15, 18, 0.72);
  padding: 8px 12px;
}

.meter span,
.tree-buttons span {
  color: var(--muted);
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.meter strong {
  display: block;
  font-size: 1.18rem;
  line-height: 1.1;
}

.hud-button {
  padding: 11px 14px;
}

.upgrade-tree {
  position: absolute;
  top: 14px;
  right: 16px;
  width: min(330px, calc(100vw - 32px));
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(12, 15, 18, 0.78);
  padding: 14px;
  z-index: 2;
}

.upgrade-tree h2 {
  font-size: 1.1rem;
  line-height: 1.1;
  margin-top: 4px;
}

.upgrade-tree p {
  font-size: 0.82rem;
  line-height: 1.35;
  margin-top: 8px;
}

.tree-buttons {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.tree-buttons button {
  min-height: 82px;
  border-radius: 8px;
  background: rgba(26, 31, 36, 0.92);
  color: var(--ink);
  padding: 9px;
  text-align: left;
  text-transform: none;
}

.tree-buttons strong {
  display: block;
  font-size: 0.88rem;
  line-height: 1.1;
}

.tree-buttons .cost {
  color: var(--amber);
  margin-top: 5px;
}

.tile-menu {
  position: absolute;
  min-width: 230px;
  max-width: 310px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(13, 17, 18, 0.92);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.32);
  padding: 12px;
  z-index: 4;
}

.tile-menu h2 {
  font-size: 1rem;
  line-height: 1.1;
  margin-top: 4px;
}

.tile-actions {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.tile-actions button {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 12px;
  border-radius: 8px;
  background: rgba(27, 34, 31, 0.96);
  color: var(--ink);
  padding: 10px;
  text-align: left;
  text-transform: none;
}

.tile-actions button strong {
  font-size: 0.92rem;
  line-height: 1.1;
}

.tile-actions button span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.25;
}

.tile-actions button .price {
  color: var(--amber);
  font-size: 0.86rem;
  grid-column: 2;
  grid-row: 1 / span 2;
  place-self: center end;
}

.tile-actions .upgrade-icon-action {
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  min-height: 54px;
}

.tile-actions .upgrade-icon-action .action-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 2px solid rgba(255, 255, 255, 0.42);
  color: #08100e;
  font-size: 1rem;
  font-weight: 900;
  line-height: 1;
}

.tile-actions .upgrade-icon-action .speed {
  background: #8fb6ff;
}

.tile-actions .upgrade-icon-action .projectile {
  background: #f4efe2;
}

.tile-actions .upgrade-icon-action .splash {
  background: #ff9b55;
}

.tile-actions .upgrade-icon-action .damage {
  background: #ff6c55;
}

.tile-actions .upgrade-icon-action .slow {
  background: #9deaff;
}

.tile-actions .upgrade-icon-action strong {
  font-size: 0.95rem;
}

.tile-actions .upgrade-icon-action .price {
  grid-column: 3;
  grid-row: auto;
}

.brand {
  width: min(760px, 92vw);
}

.kicker {
  color: var(--teal);
  display: block;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(4rem, 10vw, 9rem);
  line-height: 0.86;
  max-width: 8ch;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(2.2rem, 4vw, 4.8rem);
  line-height: 0.95;
  text-transform: uppercase;
}

p {
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.55;
  max-width: 54ch;
  margin-top: 18px;
}

.upgrade-panel {
  width: min(880px, 94vw);
}

.choices {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 22px;
}

.choice {
  min-height: 176px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 18px;
  text-align: left;
  text-transform: none;
}

.choice strong {
  color: var(--amber);
  display: block;
  font-size: 1.02rem;
  text-transform: uppercase;
}

.choice span {
  color: var(--muted);
  display: block;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.45;
}

@media (max-width: 760px) {
  .hud {
    flex-wrap: wrap;
    right: 16px;
  }

  .upgrade-tree {
    top: auto;
    right: 12px;
    bottom: 98px;
    left: 12px;
    width: auto;
  }

  .choices {
    grid-template-columns: 1fr;
  }

  .choice {
    min-height: auto;
  }
}