*{
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-en);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--line-height);
  transition:
    background-color var(--transition),
    color var(--transition);
}


html[lang="fa"] body,
html[lang="fa"] button,
html[lang="fa"] input,
html[lang="fa"] textarea,
html[lang="fa"] select {
  font-family: var(--font-fa);
}

html[lang="en"] {
  direction: ltr;
}

html[lang="fa"] {
  direction: rtl;
}

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

img {
  height: auto;
}

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

button {
  cursor: pointer;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  line-height: var(--line-height-heading);
}

::selection {
  background: var(--color-primary);
  color: #ffffff;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Respect reduced-motion preferences. */
@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;
  }
}