/* ============================================================
   BASE — reset, html/body defaults, typography primitives
   ============================================================ */

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

* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

@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;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-loose);
  font-weight: var(--fw-regular);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "cv11", "ss01";
  overflow-x: hidden;
  min-height: 100vh;
  transition: background var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}

/* Headings — Poppins, tight tracking */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); line-height: var(--lh-snug); }
h3 { font-size: var(--fs-h3); line-height: var(--lh-snug); letter-spacing: var(--tracking-snug); }
h4 { font-size: var(--fs-body-lg); font-family: var(--font-body); font-weight: var(--fw-semibold); }

p { max-width: 68ch; text-wrap: pretty; }
p + p { margin-top: var(--space-4); }

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease-out);
}
a:hover { color: var(--accent-hover); }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

ul, ol { padding-left: var(--space-5); }
li + li { margin-top: var(--space-2); }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--space-6) 0;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--ink);
  color: var(--bg);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: var(--fw-semibold);
  z-index: var(--z-modal);
  transition: top var(--dur) var(--ease-out);
}
.skip-link:focus { top: var(--space-4); color: var(--bg); }

/* Visually-hidden utility */
.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;
}