/* Livecraft — reset, document, layout primitives, ambient background */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; padding: 0; }

body {
  position: relative;
  min-height: 100vh;
  background-color: var(--bg-base);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

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

:focus-visible {
  outline: 2px solid var(--violet-bright);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Ambient background: contour lines + soft light ---------- */
body::before,
body::after {
  content: "";
  position: fixed;
  inset: -4%;
  z-index: -2;
  pointer-events: none;
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  will-change: transform, opacity;
}
body::before {
  background-image: url("../img/contours-a.svg");
  opacity: 0.32;
  filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.25));
  animation: lc-drift-a 120s ease-in-out infinite alternate;
}
body::after {
  background-image: url("../img/contours-b.svg");
  opacity: 0.22;
  filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.18));
  animation: lc-drift-b 150s ease-in-out infinite alternate;
  animation-delay: -40s;
}
.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60vw 50vh at 10% 0%, rgba(124, 58, 237, 0.14), transparent 70%),
    radial-gradient(50vw 50vh at 100% 60%, rgba(34, 211, 238, 0.06), transparent 70%),
    linear-gradient(180deg, rgba(8, 10, 15, 0.2), rgba(8, 10, 15, 0.55));
}
@keyframes lc-drift-a {
  0% { transform: scale(1) translate(0, 0); }
  50% { transform: scale(1.04) translate(-1.2%, 1%); }
  100% { transform: scale(1.02) translate(1%, -0.8%); }
}
@keyframes lc-drift-b {
  0% { transform: scale(1.02) translate(0, 0); }
  50% { transform: scale(1) translate(1.4%, -1.1%); }
  100% { transform: scale(1.03) translate(-1%, 0.9%); }
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--s-4);
}
@media (min-width: 480px) { .container { padding-inline: var(--s-5); } }
@media (min-width: 768px) { .container { padding-inline: var(--s-6); } }
@media (min-width: 1024px) { .container { padding-inline: var(--s-7); } }

main { display: block; }
[id] { scroll-margin-top: calc(var(--header-h) + 16px); }

.section { padding-block: var(--s-8); position: relative; }
@media (min-width: 1024px) { .section { padding-block: var(--s-9); } }
.section--tight { padding-block: var(--s-7); }

.u-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;
}

.skip-link {
  position: absolute; top: 0; left: var(--s-4); z-index: 1000;
  padding: var(--s-3) var(--s-5);
  background: var(--violet); color: #fff; border-radius: var(--r-sm); font-weight: 600;
  transform: translateY(-120%);
  transition: transform var(--t-micro) var(--ease);
}
.skip-link:focus { transform: translateY(var(--s-4)); }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}