* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #08150d;
  color: white;
  font-family: Arial, sans-serif;
  overflow: hidden;
  touch-action: none;
}

body {
  position: fixed;
  inset: 0;
}

.topbar {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: #102116;
  border-bottom: 2px solid #2f6b3e;
  position: relative;
  z-index: 10;
}

.title {
  font-size: 20px;
  font-weight: 700;
}

.top-actions {
  display: flex;
  gap: 8px;
}

.top-actions button {
  background: #1d5f2f;
  color: white;
  border: none;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
}

.top-actions button:hover {
  background: #267a3c;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: calc(100vh - 56px);
  height: calc(100dvh - 56px);
  background: #0b2416;
  outline: none;
}

@media (min-width: 901px) {
  .top-actions button {
    font-size: 16px;
    padding: 8px 14px;
  }

  .title {
    font-size: 22px;
  }
}

@media (max-width: 900px) {
  .title {
    font-size: 16px;
  }

  .top-actions {
    gap: 6px;
  }

  .top-actions button {
    font-size: 12px;
    padding: 8px 10px;
  }
}