/* base.css — Body, page shell, skip-link, links */

body {
  background:
    radial-gradient(ellipse 120% 60% at 50% -10%, var(--body-glow), transparent 55%),
    linear-gradient(180deg, var(--body-bg-top) 0%, var(--body-bg-mid) 55%, var(--body-bg-bot) 100%);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.35s var(--ease), color 0.25s var(--ease);
}

a { color: inherit; }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.page {
  width: min(1280px, calc(100vw - 28px));
  margin: 28px auto 56px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 2px;
  box-shadow: var(--shadow-lg);
  /* overflow must stay visible so sticky section-nav works */
  position: relative;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

/* warm top hairline */
.page::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--accent) 20%, #c46a3e 50%, var(--accent) 80%, transparent 100%);
  z-index: 60;
  pointer-events: none;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 300;
  background: var(--accent);
  color: #fffdf9;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 4px;
  transition: top 0.2s var(--ease);
}
.skip-link:focus {
  top: 12px;
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}