:root {
  --accent: #ad84ef;
  --accent-2: #ddb857;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1100px 640px at 10% -10%, var(--bg-glow-1) 0%, transparent 55%),
    radial-gradient(900px 520px at 100% 0%, var(--bg-glow-2) 0%, transparent 45%),
    linear-gradient(
      180deg,
      color-mix(in srgb, black 94%, var(--accent) 6%),
      color-mix(in srgb, black 92%, var(--accent) 8%) 50%,
      color-mix(in srgb, black 94%, var(--accent) 6%)
    );
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button {
  font: inherit;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(1500px, calc(100vw - 20px));
  margin: 10px auto 18px;
  display: grid;
  gap: 10px;
}

.tower-btn {
  min-height: 42px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  color: var(--text);
  cursor: pointer;
  transition: border-color 120ms ease, transform 120ms ease, opacity 120ms ease;
}

.tower-btn:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.tower-btn:disabled {
  opacity: 0.45;
  cursor: default;
  transform: none;
}

.tower-btn {
  background: var(--ui-ghost-bg);
  border-color: var(--ui-ghost-border);
}

.tower-btn.is-active {
  border-color: var(--accent-2);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, transparent 55%, var(--accent-2) 45%);
}

.tower-controls {
  padding: 0;
  display: block;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.tower-pick {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.canvas-wrap {
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, transparent 55%, var(--line-strong) 45%);
  background:
    radial-gradient(
      900px 540px at 20% 15%,
      color-mix(in srgb, transparent 78%, var(--accent) 22%),
      transparent 55%
    ),
    linear-gradient(
      180deg,
      color-mix(in srgb, black 88%, var(--accent) 12%),
      color-mix(in srgb, black 92%, var(--panel-2) 8%)
    );
}

.message {
  margin: 0;
  padding: 0 4px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.4;
}

.message.warning {
  color: var(--warn);
}

@media (max-width: 1150px) {
  .tower-pick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(100vw - 10px, 100%);
    margin: 6px auto 12px;
  }

  .tower-pick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}