:root {
  --paper: #fafaf8;
  --ink: #1a1a1a;
  --muted: #55554f;
  --line: #e5e5e0;
  --brand: #4b9fbb;   /* logo teal — larger surfaces (buttons) */
  --accent: #33788f;  /* darkened logo teal — links & small text (AA contrast) */
  --max: 1080px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
}
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
img { max-width: 100%; height: auto; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: #fff; }
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 0.5rem 1rem;
  padding-top: 0.75rem; padding-bottom: 0.75rem;
}
.logo { display: flex; align-items: center; text-decoration: none; }
.logo img { height: 44px; width: auto; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.site-nav a { text-decoration: none; color: var(--muted); font-size: 0.95rem; font-weight: 500; }
.site-nav a:hover { color: var(--accent); }

/* Hero */
.hero { max-width: 80ch; margin-inline: auto; padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 5vw, 4rem); }
.hero h1 {
  font-size: clamp(2rem, 1.4rem + 3vw, 3.25rem);
  line-height: 1.1; letter-spacing: -0.02em;
  margin: 0 0 1rem;
}
.hero .lede {
  font-size: clamp(1.05rem, 1rem + 0.5vw, 1.3rem);
  color: var(--muted); margin: 0 0 1.75rem;
}

/* Buttons */
.button {
  display: inline-block; background: var(--brand); color: var(--ink);
  padding: 0.7rem 1.4rem; border-radius: 4px;
  text-decoration: none; font-weight: 600;
}
.button:hover { filter: brightness(1.1); }
.button.secondary { background: transparent; color: var(--accent); }

/* Sections & cards */
section { padding: 2.5rem 0; }
h2 { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.9rem); letter-spacing: -0.01em; margin: 0 0 1rem; }
.cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem; padding: 0; margin: 1.5rem 0 0; list-style: none;
}
.card { background: #fff; border: 1px solid var(--line); border-radius: 6px; padding: 1.25rem; }
.card h3 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.card p { margin: 0 0 0.75rem; color: var(--muted); font-size: 0.95rem; }
.card a { color: var(--accent); text-decoration: none; font-weight: 600; font-size: 0.95rem; }

/* Prose pages */
.prose { max-width: 80ch; margin-inline: auto; padding: 2.5rem 0; }
.prose h1 {
  font-size: clamp(1.8rem, 1.3rem + 2.2vw, 2.6rem);
  line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 1rem;
}
.prose h2 { margin-top: 2rem; }
.prose a { color: var(--accent); }
.prose .button { color: var(--ink); }
.prose ul { padding-left: 1.25rem; }
.prose li { margin-bottom: 0.4rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 3rem; padding: 1.5rem 0 2.5rem; color: var(--muted); font-size: 0.9rem; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; justify-content: space-between; }
.site-footer a { color: var(--muted); }