@charset "UTF-8";
/* ============================================================
   02 · BASE — reset, typography, primitives
   ============================================================ */

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

* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-color: var(--cyan-deep) var(--bg);
  /* decorative glows intentionally overshoot; never let them scroll the page.
     `clip` is used instead of `hidden` so it does not create a scroll container. */
  overflow-x: clip;
}

body {
  min-height: 100svh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.68;
  letter-spacing: 0.004em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
  text-rendering: optimizeLegibility;
}

body.is-locked { overflow: hidden; }

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

button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }

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

ul, ol { list-style: none; }

::selection {
  background: rgba(var(--cyan-rgb), 0.3);
  color: #fff;
}

/* --- scrollbar ------------------------------------------------- */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--cyan-deep), var(--green-deep));
  border: 3px solid var(--bg);
  border-radius: var(--r-pill);
}
::-webkit-scrollbar-thumb:hover { background: linear-gradient(var(--cyan), var(--green)); }

/* --- focus ----------------------------------------------------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 3px;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: var(--rail);
  z-index: calc(var(--z-boot) + 1);
  padding: 0.7rem 1.15rem;
  background: var(--cyan);
  color: #04121a;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--r-sm);
  transition: top var(--t-fast) var(--e-out);
}
.skip-link:focus { top: 1rem; }

/* ============================================================
   TYPE PRIMITIVES
   ============================================================ */

h1, h2, h3, h4 {
  font-family: var(--font-ui);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.028em;
  text-wrap: balance;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.eyebrow::before {
  content: "";
  width: 1.9em;
  height: 1px;
  background: linear-gradient(90deg, transparent, currentColor);
  opacity: 0.85;
}
.eyebrow--cyan { color: var(--cyan); }
.eyebrow--green { color: var(--green); }

.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.lead {
  font-size: var(--fs-lead);
  line-height: 1.62;
  color: var(--ink-2);
  max-width: 62ch;
  text-wrap: pretty;
}

.hl { color: var(--ink); font-weight: 600; }
.hl-cyan { color: var(--cyan); }
.hl-green { color: var(--green); }

/* ============================================================
   LAYOUT PRIMITIVES
   ============================================================ */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--rail);
}

.section {
  position: relative;
  z-index: var(--z-content);
  padding-block: var(--section-y);
  scroll-margin-top: 72px;
}

/* numbered section header ------------------------------------- */
.sec-head {
  position: relative;
  display: grid;
  gap: 1.1rem;
  max-width: 46rem;
  padding-top: 1.6rem;
  margin-bottom: clamp(2.4rem, 5vw, 3.8rem);
}
.sec-head::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(var(--cyan-rgb), 0.06) 42%, transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 900ms var(--e-snap) 80ms;
}
.sec-head.is-in::before { transform: scaleX(1); }

.sec-head__top {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  flex-wrap: wrap;
}
.sec-head__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding: 0.18rem 0.42rem;
  border: 1px solid var(--line-cyan);
  border-radius: 4px;
  background: rgba(var(--cyan-rgb), 0.06);
}
.sec-head h2 {
  font-size: var(--fs-h2);
  letter-spacing: -0.035em;
}
/* Section emphasis uses a filled gradient. Outlined text is reserved for the
   hero, where the type is heavy enough to carry a hairline stroke. */
.sec-head h2 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--cyan) 8%, var(--cyan-bright) 46%, var(--green) 118%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============================================================
   REVEAL — scroll choreography
   ============================================================ */

[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 26px, 0);
  transition:
    opacity 760ms var(--e-out) var(--rd, 0ms),
    transform 760ms var(--e-snap) var(--rd, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}
[data-reveal="left"] { transform: translate3d(-30px, 0, 0); }
[data-reveal="right"] { transform: translate3d(30px, 0, 0); }
[data-reveal="scale"] { transform: scale(0.94); }
[data-reveal="clip"] {
  opacity: 1;
  transform: none;
  clip-path: inset(0 0 100% 0);
  transition: clip-path 900ms var(--e-snap) var(--rd, 0ms);
}
[data-reveal="clip"].is-in { clip-path: inset(0 0 0 0); }

/* --- link underline, left to right ---------------------------- */
.u-link {
  position: relative;
  display: inline-block;
  color: var(--ink-2);
  transition: color var(--t-mid) var(--e-out);
}
.u-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-mid) var(--e-out);
}
.u-link:hover,
.u-link:focus-visible { color: var(--cyan); }
.u-link:hover::after,
.u-link:focus-visible::after { transform: scaleX(1); }

/* ============================================================
   AMBIENT BACKGROUND
   ============================================================ */

.fx {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-bg);
}
.fx--net { z-index: var(--z-bg); opacity: 0; transition: opacity 1.4s var(--e-out) 300ms; }
.fx--star { z-index: var(--z-bg); opacity: 0; transition: opacity 1.8s var(--e-out) 500ms; }
body.is-ready .fx--net { opacity: 1; }
body.is-ready .fx--star { opacity: 0.85; }

/* spotlight follows the cursor */
.fx--spot {
  z-index: var(--z-spot);
  background:
    radial-gradient(560px circle at var(--mx) var(--my),
      rgba(var(--cyan-rgb), 0.085), transparent 62%),
    radial-gradient(900px circle at calc(100% - var(--mx)) calc(100% - var(--my)),
      rgba(var(--green-rgb), 0.035), transparent 60%);
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity 900ms var(--e-out) 200ms;
}
body.is-ready .fx--spot { opacity: 1; }

/* film grain + vignette */
.fx--grain {
  z-index: calc(var(--z-spot) + 1);
  opacity: 0.5;
  background-image:
    radial-gradient(120% 90% at 50% 0%, transparent 42%, rgba(0, 0, 0, 0.55) 100%),
    url("data:image/svg+xml;utf8,%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' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.32'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* faint blueprint grid */
.fx--grid {
  z-index: var(--z-bg);
  background-image:
    linear-gradient(rgba(var(--cyan-rgb), 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--cyan-rgb), 0.035) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(115% 75% at 50% 32%, #000 12%, transparent 74%);
  -webkit-mask-image: radial-gradient(115% 75% at 50% 32%, #000 12%, transparent 74%);
  opacity: 0;
  transition: opacity 1.6s var(--e-out) 400ms;
}
body.is-ready .fx--grid { opacity: 1; }

/* ============================================================
   ACCESSIBILITY HELPERS
   ============================================================ */

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.no-js-note {
  position: relative;
  z-index: var(--z-content);
  padding: 1rem var(--rail);
  background: rgba(var(--green-rgb), 0.08);
  border-bottom: 1px solid var(--line-green);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--green);
  text-align: center;
}