body {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #f0f0f0;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

h1 {
  margin-top: 30px;
  margin-bottom: 10px;
}

#gameCanvas {
  background: #222;
  border: 2px solid #333;
  margin: 20px 0;
  display: block;
}

#score {
  font-size: 1.2em;
  margin-bottom: 10px;
}

#startBtn {
  padding: 10px 20px;
  font-size: 1em;
  cursor: pointer;
}

.theme-toggle,
.locale-select,
.back-btn {
  font-size: 1em;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid #ccc;
  background: #fff;
  color: #222;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
body.dark .theme-toggle,
body.dark .locale-select,
body.dark .back-btn,
body .light-mode .theme-toggle,
body .light-mode .locale-select,
body .light-mode .back-btn {
  background: #23272a;
  color: #f0f0f0;
  border: 1px solid #444;
}
.theme-toggle:hover,
.locale-select:hover,
.back-btn:hover {
  background: #b3e5fc;
  color: #1976d2;
}
body.dark .theme-toggle:hover,
body.dark .locale-select:hover,
body.dark .back-btn:hover,
body .light-mode .theme-toggle:hover,
body .light-mode .locale-select:hover,
body .light-mode .back-btn:hover {
  background: #374151;
  color: #90caf9;
}

.home-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.5em;
  background: #fff;
  color: #1976d2;
  border: 2px solid #b3e5fc;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border 0.2s;
  margin-right: 16px;
  text-decoration: none;
}
body.dark .home-btn,
body .light-mode .home-btn {
  background: #23272a;
  color: #90caf9;
  border: 2px solid #374151;
}
.home-btn:hover,
.home-btn:focus {
  background: #b3e5fc;
  color: #1976d2;
  border-color: #1976d2;
  outline: none;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  width: 100%;
  flex-wrap: wrap;
}

.locale-toggle-btn {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 0.95em;
  font-weight: 600;
  letter-spacing: 0.05em;
  background: #fff;
  color: #1976d2;
  border: 2px solid #b3e5fc;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border 0.2s;
}

body.dark .locale-toggle-btn,
body .light-mode .locale-toggle-btn {
  background: #23272a;
  color: #90caf9;
  border: 2px solid #374151;
}

.locale-toggle-btn:hover,
.locale-toggle-btn:focus {
  background: #b3e5fc;
  color: #1976d2;
  border-color: #1976d2;
  outline: none;
}

@media (max-width: 600px) {
  .locale-select {
    display: none;
  }
  .locale-toggle-btn {
    display: inline-flex;
  }
  #themeToggle.theme-icon-only {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 1.4em;
    padding: 0;
    border: 2px solid #b3e5fc;
    background: #fff;
    color: #1976d2;
  }
  body.dark #themeToggle.theme-icon-only,
  body .light-mode #themeToggle.theme-icon-only {
    background: #23272a;
    color: #90caf9;
    border: 2px solid #374151;
  }
  .top-bar {
    justify-content: center;
  }
}