/* Reset, typography and global elements */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-height) + var(--space-4));
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  min-height: 100vh;
  background: var(--color-white);
  color: var(--color-ink-900);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.is-locked {
  overflow: hidden;
}

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

img {
  height: auto;
}

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

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

ul[role="list"],
ol[role="list"] {
  list-style: none;
  padding: 0;
}

/* Headings */
h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-ink-900);
  text-wrap: balance;
}

h1 {
  font-size: var(--text-h1);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-h2);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--text-h3);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h4 {
  font-family: var(--font-body);
  font-size: var(--text-h4);
  font-weight: 600;
  line-height: 1.4;
}

p {
  max-width: 68ch;
}

strong {
  font-weight: 600;
}

/* Links */
a {
  color: var(--color-primary-600);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--motion-fast) var(--ease-out);
}

a:hover {
  color: var(--color-primary-700);
  text-decoration-thickness: 2px;
}

/* Focus */
:focus-visible {
  outline: 2px solid var(--color-primary-600);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip link: first focusable element */
.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--color-ink-900);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 500;
  text-decoration: none;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
  color: var(--color-white);
}