/* ==========================================================================
   NOVA — global base
   ========================================================================== */

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

[hidden] { display: none !important; }

html:has(#boot) { overflow: hidden; }
html.nav-open { overflow: hidden; }

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-font-smoothing: antialiased;
  text-rendering: auto;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: var(--noise-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

h1, h2, h3, h4 { margin: 0 0 0.4em; line-height: 1.08; letter-spacing: -0.02em; font-weight: 650; }
h1 { font-size: var(--step-5); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }

ul, ol { margin: 0; padding: 0; list-style: none; }

code, kbd, pre, samp { font-family: var(--font-mono); font-size: 0.92em; }

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5em;
  padding: 0.15em 0.45em;
  border: var(--border-w) solid var(--line);
  border-bottom-width: 2px;
  border-radius: var(--radius-xs);
  background: var(--surface-2);
  color: var(--text-dim);
  font-size: var(--step--2);
  line-height: 1.4;
}

hr { border: none; border-top: var(--border-w) solid var(--line); margin: var(--space-6) 0; }

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 999;
  padding: var(--space-3) var(--space-4);
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--dur-2) var(--ease);
}
.skip-link:focus { top: var(--space-4); }

/* Custom scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border: 3px solid transparent;
  background-clip: padding-box;
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); background-clip: padding-box; }

.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;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}