/* ─── Design tokens — swap these out when you have a design system ─── */
:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #666666;
  --color-accent: #0057d9;
  --color-border: #e5e5e5;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Courier New', Courier, monospace;

  --max-width: 720px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ─── Layout ─── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

main {
  flex: 1;
  padding: var(--space-xl) 0;
}

/* ─── Nav ─── */
header {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header .wordmark {
  font-weight: 600;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

header nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-lg);
}

header nav a {
  text-decoration: none;
  color: var(--color-muted);
  font-size: 0.9rem;
  transition: color 0.15s;
}

header nav a:hover { color: var(--color-text); }

/* ─── Footer ─── */
footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ─── Typography ─── */
h1 { font-size: 2rem; line-height: 1.2; letter-spacing: -0.03em; font-weight: 700; }
h2 { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em; }
h3 { font-size: 1rem; font-weight: 600; }

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

/* ─── Utilities ─── */
.text-muted { color: var(--color-muted); }
.text-sm { font-size: 0.875rem; }