/* base.css — reset, body, typography defaults */

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

html, body {
  margin: 0;
  padding: 0;
}

html {
  /* Comfortable rem base */
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

h1, h2, h3, h4 {
  font-weight: var(--fw-semibold);
  line-height: var(--lh-tight);
  margin: 0 0 var(--space-2);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h1 { font-size: var(--fs-2xl); letter-spacing: -0.02em; }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }

p { margin: 0 0 var(--space-2); }

a {
  color: var(--color-accent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}
a:hover { color: var(--color-accent-ink); }
a:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

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

:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

/* Skip-link for keyboard users */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: white;
  padding: var(--space-1x) var(--space-3);
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: var(--fw-semibold);
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* Hidden util */
[hidden] { display: none !important; }
.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;
}