/* ==========================================================================
   Scanner Sentinel - Base / Reset
   ========================================================================== */

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

/* overflow-x: clip (not hidden) - hidden here would turn body into a scroll
   container and silently break the sticky header */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--text-on-light-primary);
  background: var(--bg-canvas-dark);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  overflow-x: clip;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-display);
}

/* Anchor targets clear the sticky header (nav.js keeps --header-height true) */
section[id],
footer[id] {
  scroll-margin-top: calc(var(--header-height) + 12px);
}

::selection {
  background: var(--green-500);
  color: var(--navy-950);
}

:focus-visible {
  outline: 2px solid var(--accent-primary-strong);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Screen-reader-only helper */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}