/* Alix — Base reset, typography, layout primitives, ambient background */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-0);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Engineered backdrop: a faint blueprint trace-grid over the base colour
   (which shifts on scroll via --bg-now), with two soft signal glows. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background-color: var(--bg-now, var(--bg-0));
  background-image:
    /* node dots at the grid intersections (a circuit board) */
    radial-gradient(circle, var(--hair) 1.3px, transparent 1.7px),
    /* fine trace grid */
    linear-gradient(var(--trace) 1px, transparent 1px),
    linear-gradient(90deg, var(--trace) 1px, transparent 1px),
    /* signal spotlights */
    radial-gradient(70% 52% at 50% -8%, rgba(15, 98, 254, 0.13), transparent 62%),
    radial-gradient(52% 46% at 100% 108%, rgba(43, 164, 255, 0.11), transparent 60%),
    /* depth vignette */
    radial-gradient(132% 112% at 50% 36%, transparent 56%, rgba(10, 53, 122, 0.08));
  background-size:
    58px 58px,
    58px 58px,
    58px 58px,
    100% 100%,
    100% 100%,
    100% 100%;
}
/* a second, larger node layer adds depth without busyness */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image: radial-gradient(circle, var(--trace) 1.6px, transparent 2px);
  background-size: 174px 174px;
  background-position: 29px 29px;
  opacity: 0.6;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  color: var(--text-strong);
  line-height: 1.12;
  margin: 0 0 0.5em;
  font-weight: 600;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  letter-spacing: -0.038em;
  font-weight: 700;
}
h2 {
  font-size: clamp(1.7rem, 4vw, 2.8rem);
  letter-spacing: -0.028em;
  font-weight: 700;
}
h3 {
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  letter-spacing: -0.012em;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--alix-blue);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
a:hover {
  color: var(--alix-blue-bright);
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

/* ── Form controls: guarantee text/background contrast in BOTH themes ──
   Inputs and especially native <select> popups must never render light
   text on a light background (or the reverse). */
input,
select,
textarea {
  color: var(--text-strong);
  background-color: var(--glass-bg-strong);
  color-scheme: light dark;
}
input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
  opacity: 1;
}
/* <option> popups are drawn by the OS — set explicit, theme-aware colours */
option {
  color: #0b1a33;
  background-color: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) option {
    color: #eef4fe;
    background-color: #15233a;
  }
}
html[data-theme='dark'] option {
  color: #eef4fe;
  background-color: #15233a;
}
html[data-theme='light'] option {
  color: #0b1a33;
  background-color: #ffffff;
}

:focus-visible {
  outline: 2px solid var(--alix-blue);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Layout helpers */
.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

.section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
}

/* Machine-voice eyebrow: monospace "module address" with a leading marker. */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6ch;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--alix-blue);
  font-weight: 500;
}
.eyebrow::before {
  content: '//';
  opacity: 0.55;
  font-weight: 600;
}
html[dir='rtl'] .eyebrow::before {
  content: '⟋⟋';
}

.text-muted {
  color: var(--text-muted);
}

.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.center {
  text-align: center;
}

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--text);
  max-width: 60ch;
}

/* Visually hidden (a11y) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Reveal-on-scroll baseline */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s var(--ease),
    transform 0.7s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

@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;
  }
}