/* base.css — reset, tokens, typography */
:root {
  --red: #e4002b;
  --red-dark: #b80022;
  --ink: #0d0d0f;
  --ink-soft: #2b2b30;
  --paper: #ffffff;
  --paper-2: #f5f5f4;
  --paper-3: #ececea;
  --line: #d9d9d6;
  --mono: #6b6b70;
  --grid-max: 1240px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;
  --radius: 4px;
  --ease: cubic-bezier(.2,.7,.3,1);
  --ff-display: "Space Grotesk", system-ui, sans-serif;
  --ff-body: "Inter", system-ui, -apple-system, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--ff-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  font-family: var(--ff-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
  color: var(--ink);
}

h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.55rem); }
h4 { font-size: 1.1rem; letter-spacing: 0; }

p { margin: 0 0 var(--space-4); }

a {
  color: var(--ink);
  text-decoration: none;
  transition: color .25s var(--ease);
}
a:hover { color: var(--red); }

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

ul, ol { margin: 0 0 var(--space-4); padding-left: 1.25em; }
li { margin-bottom: var(--space-2); }

strong { font-weight: 600; }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--space-5) 0;
}

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

.mono {
  font-family: var(--ff-display);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--mono);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

:focus-visible {
  outline: 3px solid var(--red);
  outline-offset: 2px;
}