* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: #000;
  background-image:
    radial-gradient(circle at top right, rgba(121,68,154,0.13), transparent),
    radial-gradient(circle at 20% 80%, rgba(41,196,255,0.13), transparent);
  color: white;
}

/* stars */
canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
}

/* music */
.toolbar {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 20;
}

.tool-btn {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  color: white;
  font-size: 20px;
  cursor: pointer;
}

/* center box */
.ui-center {
  position: fixed;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
}

.window {
  width: min(760px, 94vw);
  border-radius: 16px;
  overflow: hidden;

  background: rgba(15, 22, 35, 0.5);

  backdrop-filter: blur(14px);

  border: 1px solid rgba(255,255,255,0.15);

  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04) inset,
    0 20px 50px rgba(0,0,0,0.5);

  animation: fadeIn 0.8s ease forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.window-bar {
  background: rgba(10,14,24,0.7);
  padding: 12px 18px;
}

.window-body {
  display: flex;
  gap: 40px;
  padding: 40px;
}

.about-left {
  flex: 1;
}

.title {
  font-size: 40px;
  margin-bottom: 20px;
}

.about-text p {
  margin-bottom: 16px;
  line-height: 1.5;
  color: rgba(255,255,255,0.8);
}

.about-right {
  display: flex;
  align-items: center;
}

.pixel-cat {
  font-size: 100px;
}