/* ============================================================
   Aidapt — Base element defaults
   Applies the system's foundations to bare HTML so documents
   and prototypes inherit the brand without extra classes.
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  font-weight: var(--fw-regular);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  text-wrap: balance;
}
h1 { font-weight: var(--fw-extrabold); font-size: var(--fs-h1); line-height: var(--lh-h1); letter-spacing: var(--ls-tight); }
h2 { font-size: var(--fs-h2); line-height: var(--lh-h2); letter-spacing: var(--ls-tight); }
h3 { font-size: var(--fs-h3); line-height: var(--lh-h3); letter-spacing: var(--ls-snug); }
h4 { font-size: var(--fs-h4); line-height: var(--lh-h4); letter-spacing: var(--ls-snug); }
h5 { font-size: var(--fs-h5); line-height: var(--lh-h5); letter-spacing: var(--ls-snug); }
h6 { font-size: var(--fs-h6); line-height: var(--lh-h6); letter-spacing: var(--ls-snug); }

p { margin: 0; text-wrap: pretty; }

a {
  color: var(--text-link);
  text-decoration: none;
  transition: var(--transition-colors);
}
a:hover { color: var(--teal-700); text-decoration: underline; text-underline-offset: 0.15em; }

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

:where(button, input, select, textarea) { font-family: inherit; }

/* Kill tap latency: no double-tap-zoom wait, no grey tap flash.
   Feedback belongs to the component, on pointer-DOWN. */
:where(button, [role="button"], a, label, summary, input, select, textarea) {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

::selection { background: var(--teal-200); color: var(--ink-900); }

:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

hr {
  border: none;
  border-top: var(--border-hairline) solid var(--border-default);
  margin: var(--space-8) 0;
}