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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  background: var(--bg-0);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--gradient-aurora), var(--bg-0);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}

::selection { background: rgba(255, 84, 92, 0.36); color: #fff; }

img, svg, canvas { display: block; max-width: 100%; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, h4 { margin-top: 0; }

h1, h2, h3, h4 {
  color: var(--ink);
  font-family: var(--font-display);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h1 { font-size: clamp(3.4rem, 7.6vw, 7.6rem); font-weight: 700; }
h2 { font-size: clamp(2.35rem, 5vw, 4.8rem); font-weight: 650; }
h3 { font-size: clamp(1.25rem, 2vw, 1.8rem); font-weight: 650; }

.shell {
  width: min(var(--shell), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

.section { padding-block: var(--section-space); position: relative; }

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  align-items: end;
  gap: clamp(28px, 6vw, 92px);
  margin-bottom: clamp(36px, 5vw, 64px);
}

.section-heading h2 { max-width: 820px; margin-bottom: 0; }
.section-heading > p { margin: 0; color: var(--muted); max-width: 560px; }

.section-kicker,
.signal-label,
.micro-label,
.panel-topline,
.status-pill,
.neural-stage-topline {
  font-family: var(--font-mono);
  font-size: 0.69rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.section-kicker,
.signal-label { display: inline-flex; align-items: center; gap: 10px; color: var(--coral); margin-bottom: 16px; }
.signal-label span,
.section-kicker::before {
  content: '';
  width: 22px;
  height: 1px;
  background: currentColor;
  box-shadow: 0 0 10px currentColor;
}

.fine-print { color: var(--faint); font-size: 0.78rem; line-height: 1.55; }
.fine-print code { color: var(--ink-soft); font-family: var(--font-mono); }

.cut-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--gradient-panel), var(--panel);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  box-shadow: var(--shadow-panel);
  isolation: isolate;
}

.cut-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 100% 0%, rgba(255, 75, 83, 0.14), transparent 38%);
}

.cut-panel::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(105deg, transparent 25%, rgba(255, 255, 255, 0.035) 48%, transparent 72%);
  transform: translateX(-130%);
  transition: transform 1s var(--ease-out);
}

.cut-panel:hover::after { transform: translateX(130%); }

.page-noise {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.7'/%3E%3C/svg%3E");
}

.cursor-aura {
  position: fixed;
  width: 360px;
  height: 360px;
  left: 0;
  top: 0;
  z-index: -1;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(circle, rgba(255, 75, 83, 0.09), transparent 66%);
  transform: translate3d(-50%, -50%, 0);
  transition: opacity 0.3s ease;
}

body.has-pointer .cursor-aura { opacity: 1; }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 1000;
  background: transparent;
}

.scroll-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--gradient-brand);
  box-shadow: 0 0 16px rgba(255, 70, 78, 0.7);
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 2000;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--bg-0);
  font-weight: 800;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 16px; }

.reveal-block {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal-block.is-visible { opacity: 1; transform: none; }

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 4px;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--red), var(--coral)); border: 3px solid var(--bg-0); border-radius: 999px; }