/* ==========================================================================
   Base — reset, document, typography primitives, layout helpers
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
  background: var(--bg-primary);
}

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  transition: background-color var(--dur-medium) var(--ease-out), color var(--dur-medium) var(--ease-out);
}

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

img {
  height: auto;
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd,
ul,
ol {
  margin: 0;
}

:where(ul[role="list"], ol[role="list"]) {
  list-style: none;
  padding: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-snug);
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

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

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

mark {
  background: none;
  color: var(--accent);
}

em {
  font-style: normal;
  color: var(--accent-3);
}

strong {
  font-weight: 600;
  color: var(--text-primary);
}

::selection {
  background: var(--accent);
  color: var(--text-inverse);
}

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

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: max(var(--gutter), env(safe-area-inset-left, 0px));
}

.section {
  position: relative;
  padding-block: var(--section-pad);
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-feature-settings: "tnum" 1;
}

.accent {
  color: var(--accent);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  inset-inline-start: var(--space-4);
  top: calc(var(--space-4) + env(safe-area-inset-top, 0px));
  z-index: 200;
  padding: var(--space-3) var(--space-5);
  background: var(--accent);
  color: var(--text-inverse);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
  transition: transform var(--dur-short) var(--ease-out);
}

.skip-link:focus {
  transform: none;
}

/* Directional icons flip in LTR (paths are authored for RTL) */
:root[dir="ltr"] .flip-rtl,
:root[dir="ltr"] .btn__arrow {
  transform: scaleX(-1);
}