/* Reset + element defaults. Depends on tokens.css. */

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
}

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

/* ---- Scripts ----
   Chinese uses the system CJK fonts; Arabic and Chinese get a little more
   line height. Letter-spacing breaks Arabic joining and crowds CJK, so it
   is reset for both. */
:root:lang(zh-Hans) { --font-sans: var(--font-sans-hans); }
:root:lang(zh-Hant) { --font-sans: var(--font-sans-hant); }
:root:lang(ar), :root:lang(zh) { --leading-normal: 1.7; --leading-tight: 1.35; --leading-snug: 1.5; }
:lang(ar), :lang(ar) *, :lang(zh), :lang(zh) * { letter-spacing: normal !important; }

body {
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: var(--weight-bold);
  text-wrap: balance;
  overflow-wrap: break-word;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); font-weight: var(--weight-semibold); letter-spacing: -0.01em; }
h4 { font-size: var(--text-lg); font-weight: var(--weight-semibold); letter-spacing: normal; }

p,
li {
  text-wrap: pretty;
  overflow-wrap: break-word;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--color-accent-hover);
}

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

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

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin-block: var(--space-6);
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

:not(pre) > code {
  background: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.35em;
}

pre {
  background: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
}

table {
  border-collapse: collapse;
  width: 100%;
}

[hidden] {
  display: none !important;
}

/* ---- Utilities (keep this list short) ---- */
.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;
}

.skip-link {
  position: absolute;
  inset-inline-start: var(--space-4);
  top: -100px;
  z-index: var(--z-toast);
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
}

.skip-link:focus {
  top: var(--space-4);
  color: var(--color-on-accent);
}

.text-muted { color: var(--color-text-muted); }
.text-subtle { color: var(--color-text-subtle); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-lg { font-size: var(--text-lg); }
.text-center { text-align: center; }
.mono { font-family: var(--font-mono); }
.nowrap { white-space: nowrap; }

.eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-accent);
}

.lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
}

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Vertical rhythm between children. Each variant sets the spacing on its own
   children only, so nested stacks don't change their parent's spacing. */
.stack > * + * { margin-top: var(--space-4); }
.stack.stack-sm > * + * { margin-top: var(--space-2); }
.stack.stack-lg > * + * { margin-top: var(--space-8); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cluster-gap, var(--space-3));
  align-items: center;
}

.icon {
  display: inline-block;
  vertical-align: -0.2em;
  width: 1.25em;
  height: 1.25em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-sm { width: 1rem; height: 1rem; }
.icon-lg { width: 1.5rem; height: 1.5rem; }
.icon-xl { width: 2rem; height: 2rem; }