/* Shared chrome: container, nav links, buttons.
   Used by every page so they all share the same look. */

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  scroll-behavior: smooth;
}

.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }
a { color: inherit; }

.nav-a {
  color: var(--ink);
  text-decoration: none;
  opacity: 0.75;
  transition: opacity .15s;
}
.nav-a:hover { opacity: 1; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: var(--cream);
  padding: 10px 18px;
  border-radius: 6px;
  border: 1px solid var(--ink);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: opacity .15s, transform .15s;
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary.lg { padding: 14px 24px; font-size: 15px; border-radius: 8px; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--ink);
  padding: 10px 18px;
  border-radius: 6px;
  border: 1px solid var(--rule-strong);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: background .15s;
}
.btn-ghost:hover { background: var(--cream-2); }
.btn-ghost.lg { padding: 14px 24px; font-size: 15px; border-radius: 8px; }