@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: #f8f9fa;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 300;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: #2c3e50;
}

.container {
  width: 100%;
  margin: 0 auto;
  padding: 0;
}

.navbar {
  background: #ffffff;
  border-bottom: 1px solid #e9ecef;
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: none;
  padding: 0 24px;
}

.logo {
  color: #2c3e50;
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-link {
  color: #6c757d;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 6px;
  transition: all 0.2s ease;
  font-weight: 400;
  font-size: 14px;
}

.nav-link:hover {
  color: #495057;
  background: #f8f9fa;
}

.mode-selector {
  position: relative;
  display: inline-block;
}

.mode-dropdown {
  background: #ffffff;
  color: #495057;
  border: 1px solid #dee2e6;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 400;
  font-family: 'Inter', sans-serif;
  transition: all 0.2s ease;
  min-width: 140px;
}

.mode-dropdown:hover {
  border-color: #adb5bd;
}

.mode-dropdown:focus {
  outline: none;
  border-color: #86b7fe;
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.game-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px;
  width: 100%;
}

.game-canvas-container {
  background: #000000;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border: 1px solid #e9ecef;
  width: 100%;
  max-width: 1072px;
  display: flex;
  justify-content: center;
}

#gameCanvas {
  border-radius: 8px;
  display: block;
  background: #000000;
  border: 1px solid #e9ecef;
}

.controls-panel {
  background: #ffffff;
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
  color: #495057;
  text-align: center;
  border: 1px solid #e9ecef;
  max-width: 1072px;
  width: 100%;
  font-weight: 400;
}

.about-section {
  background: #ffffff;
  border-radius: 12px;
  padding: 32px;
  margin: 24px;
  color: #495057;
  line-height: 1.6;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border: 1px solid #e9ecef;
  font-weight: 400;
  max-width: 800px;
  margin: 24px auto;
}

.about-section ul {
  padding-left: 20px;
}

.about-section li {
  margin-bottom: 8px;
}

.btn {
  background: #2c3e50;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  font-family: 'Inter', sans-serif;
  transition: all 0.2s ease;
}

.btn:hover {
  background: #34495e;
}

.hidden {
  display: none !important;
}

kbd {
  background: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: 4px;
  padding: 2px 6px;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  font-size: 0.875em;
  font-weight: 400;
  color: #495057;
}

@media (max-width: 768px) {
  .navbar-content {
    flex-direction: column;
    gap: 16px;
    padding: 0 16px;
  }
  
  .game-canvas-container {
    padding: 16px;
    margin: 0 16px;
  }
  
  #gameCanvas {
    max-width: 100%;
    height: auto;
  }

  .about-section {
    margin: 16px;
    padding: 24px;
  }

  .controls-panel {
    margin: 16px;
  }
}

/* Improve font rendering for Unicode characters */
.unicode-text {
  font-family: 'Inter', 'Noto Sans CJK SC', 'Noto Sans CJK TC', 'Source Han Sans', sans-serif;
  font-weight: 300;
}