/* ==========================================================================
   Base — reset, root element behavior, base typography, accessibility
   ========================================================================== */

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

* {
  margin: 0;
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-ui);
  font-size: var(--text-body);
  line-height: var(--leading-snug);
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--duration-base) var(--ease-standard),
    color var(--duration-base) var(--ease-standard);
}

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

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

button {
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

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

ul,
ol {
  padding-left: 1.25em;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text);
  text-wrap: balance;
}

p {
  line-height: var(--leading-prose);
}

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

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

hr {
  border: none;
  border-top: 1px solid var(--color-border);
}

/* ---- Focus states ------------------------------------------------------
   Every interactive element gets a visible, consistent focus ring. Never
   remove focus outlines without providing this replacement. */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

/* ---- Skip link ---------------------------------------------------------*/
.skip-link {
  position: absolute;
  top: -48px;
  left: var(--space-4);
  z-index: var(--z-toast);
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  transition: top var(--duration-fast) var(--ease-standard);
}

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

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

/* ---- Visually hidden but accessible ----------------------------------*/
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---- Scrollbar (subtle, both themes) ----------------------------------*/
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}