/* ============================================================
   ZippyBunny · Base layer
   Element defaults + a few signature utilities. Everything here
   is built on the tokens. Keep this lean; it ships to consumers.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  font-weight: var(--weight-regular);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1;
}

/* --- Headings default to the display serif --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  margin: 0 0 0.5em;
  text-wrap: balance;
}
h1 { font-size: var(--text-4xl); line-height: var(--leading-tight); letter-spacing: var(--tracking-tighter); }
h2 { font-size: var(--text-3xl); line-height: var(--leading-tight); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-md); }

p { margin: 0 0 1em; max-width: var(--measure); text-wrap: pretty; }

a {
  color: var(--text-link);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
  text-decoration-color: color-mix(in srgb, var(--text-link) 45%, transparent);
  transition: color var(--dur-fast) var(--ease-standard),
              text-decoration-color var(--dur-fast) var(--ease-standard);
}
a:hover { color: var(--text-link-hover); text-decoration-color: currentColor; }

strong, b { font-weight: var(--weight-semibold); }
small { font-size: var(--text-sm); }

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

::selection { background: var(--selection-bg); color: var(--text-primary); }

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

hr {
  border: none;
  border-top: var(--border-thin) solid var(--border-hairline);
  margin: var(--space-xl) 0;
}

img { max-width: 100%; display: block; }

/* ============================================================
   Signature utilities
   ============================================================ */

/* Mono overline / eyebrow label */
.zb-label {
  font-family: var(--font-mono);
  font-size: var(--label-size);
  font-weight: var(--label-weight);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Dotted blueprint backdrop — drop on any container */
.zb-grid-paper {
  background-color: var(--bg-page);
  background-image: radial-gradient(var(--grid-dot) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: -1px -1px;
}

/* Fine construction-line grid */
.zb-grid-lines {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Roman-arch silhouette (avatars, feature tiles, buttons) */
.zb-arch { border-radius: var(--radius-arch); }

/* Hairline registration frame, like a plate in the codex */
.zb-plate {
  border: var(--border-thin) solid var(--border-hairline);
  background: var(--surface-card);
  box-shadow: var(--shadow-sm);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}