:root {
  --bg-color: #0d0d0d;
  --text-color: #e0e0e0;
  --primary-color: #6200ea;
  --accent-color: #03dac6;
  --box-bg: rgba(255, 255, 255, 0.05);
  --box-border: rgba(255, 255, 255, 0.1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-speed: 0.3s;

  /* Dynamic Scaling Variables */
  --base-font-size: clamp(14px, 0.5vw + 12px, 18px);
  --heading-font-size: clamp(1.8rem, 2vw + 1rem, 3rem);
  --base-padding: clamp(0.8rem, 1vw + 0.2rem, 1.5rem);
  --base-gap: clamp(0.5rem, 1vw, 2rem);
}

html {
  font-size: var(--base-font-size);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  height: 100vh;
  overflow: hidden;
  /* プレイページでのスクロール抑制 */
}

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

button {
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  border: none;
  transition: all var(--transition-speed);
  background: var(--primary-color);
  color: white;
}

button:hover {
  filter: brightness(1.2);
  transform: translateY(-2px);
}

button:disabled {
  background: #333;
  cursor: not-allowed;
  transform: none;
}

.glass {
  background: var(--box-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--box-border);
  border-radius: 12px;
}

/* Base App Layout */
#app {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slowZoom {
  from {
    transform: scale(1);
    opacity: 0;
  }

  10% {
    opacity: 1;
  }

  to {
    transform: scale(1.1);
  }
}

.fade-in {
  animation: fadeIn 1s ease-out forwards;
}

/* Common Header/Footer for Editor */
.editor-header {
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-color);
  border-bottom: 1px solid var(--box-border);
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}