:root {
  --bg-base: #ffffff;
  --text-primary: #0b0b0b;
  --text-muted: rgba(11, 11, 11, 0.65);
  --accent: #000000;
  --accent-strong: #222222;
  --panel-bg: #ffffff;
  --panel-border: rgba(11, 11, 11, 0.06);
  --panel-shadow: 0 12px 32px rgba(11, 11, 11, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  background: var(--bg-base);
  position: relative;
}

main, nav, section, header, footer {
  position: relative;
  z-index: 1;
}

p {
  color: var(--text-muted);
  max-width: 65ch;
}

ul {
  color: var(--text-muted);
}

a {
  color: var(--accent);
}

a:hover,
a:focus-visible {
  color: var(--accent-strong);
}

.glass-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  box-shadow: var(--panel-shadow);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(11, 11, 11, 0.04);
  color: var(--text-muted);
}

.notion-image {
  margin: 2rem 0;
  text-align: center;
}

.notion-image img {
  width: 100%;
  border-radius: 12px;
  box-shadow: var(--panel-shadow);
}

.notion-image figcaption {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.notion-equation {
  margin: 1.5rem auto;
  padding: 1rem;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.02);
  font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-size: 1.1rem;
  text-align: center;
}