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

html, body { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 18px);
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--t-base);
  line-height: 1.68;
  letter-spacing: .002em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -.015em;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }

button { font: inherit; color: inherit; }

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

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

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

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--bg-deep);
  border-radius: 0 0 var(--r-sm) 0;
  font-size: var(--t-sm);
}
.skip-link:focus { left: 0; }

/* ---------- background field ---------- */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-grid {
  position: absolute;
  inset: -2px;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 110% 80% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 110% 80% at 50% 0%, #000 20%, transparent 78%);
}

.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .9;
}
.bg-glow-a {
  width: 46vw; height: 46vw; min-width: 380px; min-height: 380px;
  top: -16vw; left: -8vw;
  background: radial-gradient(circle, var(--glow-1), transparent 68%);
  animation: drift-a 22s var(--ease) infinite alternate;
}
.bg-glow-b {
  width: 40vw; height: 40vw; min-width: 320px; min-height: 320px;
  top: 8vh; right: -12vw;
  background: radial-gradient(circle, var(--glow-2), transparent 68%);
  animation: drift-b 26s var(--ease) infinite alternate;
}
.bg-glow-c {
  width: 52vw; height: 34vw; min-width: 320px;
  bottom: -14vw; left: 22vw;
  background: radial-gradient(circle, var(--glow-3), transparent 70%);
  animation: drift-c 30s var(--ease) infinite alternate;
}

.bg-scan {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 3px,
    rgba(140, 170, 255, .018) 3px 4px
  );
  opacity: .6;
}

@keyframes drift-a { from { transform: translate3d(0, 0, 0) } to { transform: translate3d(6vw, 4vh, 0) } }
@keyframes drift-b { from { transform: translate3d(0, 0, 0) } to { transform: translate3d(-5vw, 6vh, 0) } }
@keyframes drift-c { from { transform: translate3d(0, 0, 0) } to { transform: translate3d(4vw, -5vh, 0) } }

.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 520px; height: 520px;
  margin: -260px 0 0 -260px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  background: radial-gradient(circle, rgba(79, 214, 255, .10), rgba(155, 140, 255, .05) 42%, transparent 66%);
  transition: opacity var(--dur-3) var(--ease);
  will-change: transform;
}
.cursor-glow.on { opacity: 1; }

#app { position: relative; z-index: 2; }

/* ---------- scrollbar ---------- */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--line-2) transparent;
}
*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--line-2);
  border-radius: var(--r-pill);
}
*::-webkit-scrollbar-thumb:hover { background: var(--line-3); }

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .bg-glow { animation: none; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}