/* ============================================================================
   CybNodes : BASE : reset, layout, typographie, boutons, animations.
   Consomme uniquement les tokens (tokens.css). Aucune valeur magique.
   ============================================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---- Fond : grille cyberpunk + halo, fixés derrière tout ---- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 75% -5%, rgba(0, 229, 255, .10), transparent 60%),
    radial-gradient(800px 600px at 10% 110%, rgba(177, 77, 255, .10), transparent 60%),
    var(--c-bg);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--c-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-border) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 80%);
  opacity: .25;
}

/* ---- Typographie ---- */
h1, h2, h3 { line-height: var(--lh-tight); font-weight: 700; letter-spacing: -.02em; }
h2 { font-size: var(--fs-xl); margin-bottom: var(--sp-4); }
h3 { font-size: var(--fs-lg); margin-bottom: var(--sp-3); }
p  { color: var(--c-text-dim); }

a { color: var(--c-accent); text-decoration: none; transition: color var(--dur-fast) var(--ease); }
a:hover { color: #7af0ff; }

code, kbd, pre { font-family: var(--font-mono); }

/* ---- Layout ---- */
.container { width: min(100% - var(--gutter) * 2, var(--maxw)); margin-inline: auto; }
.section { padding-block: var(--sp-24); }
.section__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--c-accent);
  text-transform: uppercase;
  letter-spacing: .25em;
  margin-bottom: var(--sp-3);
}
.section__lead { font-size: var(--fs-md); max-width: 62ch; }

/* ---- Texte en dégradé néon ---- */
.grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---- Boutons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: .8em 1.4em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease),
              background var(--dur-fast) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--grad-accent); color: #04121a; box-shadow: var(--glow-accent); }
.btn--primary:hover { box-shadow: 0 0 28px rgba(0, 229, 255, .65); }
.btn--ghost { background: var(--c-surface); color: var(--c-text); border-color: var(--c-border-lit); }
.btn--ghost:hover { border-color: var(--c-accent); color: #7af0ff; }

/* ---- Animations ---- */
@keyframes reveal-up { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: none; } }
@keyframes pulse-glow { 0%, 100% { opacity: .5; } 50% { opacity: 1; } }
@keyframes float-y { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes line-sweep { from { background-position: -200% 0; } to { background-position: 200% 0; } }

.reveal { opacity: 0; }
.reveal.is-in { animation: reveal-up var(--dur) var(--ease) forwards; }
.reveal[data-delay="1"].is-in { animation-delay: .08s; }
.reveal[data-delay="2"].is-in { animation-delay: .16s; }
.reveal[data-delay="3"].is-in { animation-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; }
}