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

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--page-bg);
  color: var(--text-1);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  display: grid;
  place-items: center;
}

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

button, [role="button"], a { -webkit-tap-highlight-color: transparent; }

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
[tabindex]:focus-visible,
summary:focus-visible {
  outline: 0.16rem solid var(--accent, var(--cyan));
  outline-offset: 0.2rem;
}

a { color: var(--cyan); }

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

h1, h2, h3, h4, p { margin-top: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  letter-spacing: -0.025em;
}

h1 { font-size: clamp(2.75rem, 5.2rem, 5.2rem); line-height: 0.98; margin-bottom: 1.25rem; }
h2 { font-size: 3rem; line-height: 1.04; margin-bottom: 0.7rem; }
h3 { font-size: 1.42rem; line-height: 1.15; margin-bottom: 0.62rem; }
h4 { font-size: 1.05rem; margin-bottom: 0.4rem; }

p, li { font-size: 1.22rem; line-height: 1.48; }
p { color: var(--text-2); margin-bottom: 0.8rem; }
small { color: var(--text-3); }

strong { color: var(--text-1); font-weight: 700; }

code, pre, .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

::selection { background: var(--selection-bg); }

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  transform: translateY(-160%);
  padding: 0.65rem 0.9rem;
  background: var(--surface-strong);
  border: 1px solid var(--cyan);
  border-radius: var(--radius-sm);
  transition: transform var(--fast) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }