/* Base Reset ও Global Typography — Document 6 নীতি অনুসরণ করে, কোনো hardcoded value নয় */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  transition: background-color var(--duration-normal), color var(--duration-normal);
}

h1, h2, h3, h4 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover { color: var(--color-primary-hover); }

/* Accessibility: visible keyboard focus (Document 6, অনুচ্ছেদ ৯) */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* Page-level content wrapper — Inline CSS এড়ানোর জন্য reusable utility */
.page-section {
  padding-block: var(--space-xl);
}

/* Mobile-first breakpoint scale-up (Document 6, অনুচ্ছেদ ৭) */
@media (min-width: 768px) {
  .container { padding-inline: var(--space-lg); }
  h1 { font-size: var(--font-size-3xl); }
}