:root {
  --bg: #f4f6fb;
  --fg: #111;
  --card: rgba(255,255,255,0.65);
  --blur: blur(14px);
}

[data-theme="dark"] {
  --bg: #0b0e14;
  --fg: #e6e6e6;
  --card: rgba(20,20,30,0.65);
}

* {
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  overflow-x: hidden;
}

canvas {
  position: fixed;
  inset: 0;
  z-index: -1;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
}

.controls {
  display: flex;
  gap: 8px;
}

button {
  background: var(--card);
  backdrop-filter: var(--blur);
  border: none;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--fg);
  cursor: pointer;
}

.container {
  max-width: 900px;
  margin: 80px auto;
  padding: 0 20px;
}

.card {
  background: var(--card);
  backdrop-filter: var(--blur);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  animation: fadeup 0.6s ease;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.link {
  text-align: center;
  text-decoration: none;
  color: var(--fg);
}

@keyframes fadeup {
  from { opacity: 0; transform: translatey(20px); }
  to { opacity: 1; transform: translatey(0); }
}