/* ==========================================================================
   fleetmux.dev — base layer
   Reset, typography, page shell, background canvas, scroll reveal.
   Loaded after tokens.css.
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + var(--sp-6));
}

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  font-weight: var(--weight-regular);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: var(--weight-semibold);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--text);
  text-wrap: balance;
  overflow-wrap: break-word;
}

p {
  margin: 0;
  text-wrap: pretty;
}

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 0.2em;
  transition: color var(--dur-2) var(--ease-out);
}

a:hover {
  color: var(--text);
  text-decoration: underline;
}

ul,
ol {
  margin: 0;
  padding-left: 1.2em;
}

li + li {
  margin-top: var(--sp-2);
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

code,
kbd,
pre,
samp {
  font-family: var(--font-mono);
  font-size: 0.9375em;
}

kbd {
  display: inline-block;
  padding: 0.1em 0.42em;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--text-soft);
  font-size: var(--fs-xs);
  line-height: 1.4;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--sp-8) 0;
}

::selection {
  background: rgba(61, 245, 200, 0.24);
  color: var(--text);
}

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

.skip-link {
  position: absolute;
  top: var(--sp-2);
  left: var(--sp-2);
  z-index: var(--z-skip);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-sm);
  background: var(--accent);
  color: var(--text-inverse);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  transform: translateY(-200%);
  transition: transform var(--dur-2) var(--ease-out);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline-color: var(--text-inverse);
}

/* ---- layout shell -------------------------------------------------------- */

.site-main {
  position: relative;
  z-index: var(--z-content);
  padding-top: var(--nav-h);
}

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

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

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

.section--tight {
  padding-block: clamp(2rem, 1.4rem + 2.4vw, 3.5rem);
}

.section--flush-top {
  padding-top: 0;
}

.section__head {
  max-width: 62ch;
  margin-bottom: var(--sp-9);
}

.section__head--center {
  margin-inline: auto;
  text-align: center;
}

.section__head--center .lede {
  margin-inline: auto;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.stack--sm {
  gap: var(--sp-2);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-3);
}

.grid {
  display: grid;
  gap: var(--sp-5);
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
}

.grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
}

.grid--sidebar {
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-9);
}

@media (min-width: 960px) {
  .grid--sidebar {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
    align-items: start;
  }
}

/* ---- typography helpers -------------------------------------------------- */

.display {
  font-size: var(--fs-4xl);
  line-height: var(--lh-tight);
  letter-spacing: -0.03em;
  font-weight: var(--weight-semibold);
  overflow-wrap: break-word;
}

.h1 {
  font-size: var(--fs-3xl);
  line-height: var(--lh-tight);
  letter-spacing: -0.025em;
}

.h2 {
  font-size: var(--fs-2xl);
}

.h3 {
  font-size: var(--fs-xl);
}

.h4 {
  font-size: var(--fs-lg);
  font-family: var(--font-mono);
  font-weight: var(--weight-semibold);
}

.lede {
  max-width: 62ch;
  margin-top: var(--sp-4);
  color: var(--text-soft);
  font-size: clamp(1.0625rem, 1rem + 0.35vw, 1.25rem);
  line-height: var(--lh-loose);
}

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

.dim {
  color: var(--dim);
}

.mono {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
}

.text-sm {
  font-size: var(--fs-sm);
}

.text-xs {
  font-size: var(--fs-xs);
}

.gradient-text {
  background: linear-gradient(100deg, var(--text) 0%, var(--accent) 45%, var(--accent-2) 70%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
}

.glow-text {
  text-shadow: var(--glow-text);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent));
}

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

/* ---- page background: grid + flowing nodes ------------------------------ */

.page-bg {
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
  overflow: hidden;
}

.page-bg__grid {
  position: absolute;
  inset: -10%;
  background-image:
    linear-gradient(to right, rgba(120, 160, 220, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(120, 160, 220, 0.055) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, rgba(0, 0, 0, 0.55) 55%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, rgba(0, 0, 0, 0.55) 55%, transparent 100%);
  opacity: 0.9;
}

.page-bg__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}

.page-bg__glow--accent {
  top: -18vmax;
  left: -8vmax;
  width: 46vmax;
  height: 46vmax;
  background: radial-gradient(circle, rgba(61, 245, 200, 0.16), transparent 62%);
}

.page-bg__glow--violet {
  top: 22vmax;
  right: -14vmax;
  width: 42vmax;
  height: 42vmax;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.18), transparent 64%);
}

.page-bg__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.85;
}

/* ---- hero first screen --------------------------------------------------- */

/* The hero sits right under the fixed header: keep a real gap between the nav
   bar and the eyebrow instead of butting the two together. */
#hero.section--flush-top {
  padding-top: clamp(1.5rem, 1rem + 1.2vw, 2.5rem);
}

/* Headlines never break inside a word. The size is bounded so the English
   headline stays at three lines on 1280-1920 wide screens and the lede plus
   both buttons stay inside a 1440x900 first screen. */
#hero .display {
  font-size: clamp(2.5rem, 1.35rem + 3.1vw, 4rem);
  overflow-wrap: normal;
  word-break: normal;
  hyphens: none;
}

@media (min-width: 960px) {
  #hero .grid--sidebar {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: var(--sp-7);
  }
}

/* A hairline horizon under the header, used by the hero. */
.horizon {
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong) 22%, var(--line-glow) 50%, var(--line-strong) 78%, transparent);
  opacity: 0.8;
  pointer-events: none;
}

/* ---- scroll reveal ------------------------------------------------------- */

/* Reveal is opt-in at runtime: main.js adds .reveal--armed only once the
   IntersectionObserver is actually set up, so a script failure never leaves
   content invisible. */
.reveal--armed {
  opacity: 0;
  transform: translate3d(0, var(--reveal-shift), 0);
  transition:
    opacity var(--dur-4) var(--ease-out),
    transform var(--dur-4) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.reveal--armed.is-visible {
  opacity: 1;
  transform: none;
}

.reveal--done {
  will-change: auto;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal--armed,
  .reveal--armed.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

:root.no-motion .reveal--armed,
:root.no-motion .reveal--armed.is-visible {
  opacity: 1;
  transform: none;
  transition: none;
}

/* Animation is paused while the tab is hidden (JS sets this class on <body>).
   Covers the canvas node graph, SVG flow edges, the terminal cursor and the
   status pulse, so nothing keeps burning frames in a background tab. */
.is-page-hidden .page-bg__canvas,
.is-page-hidden .fx-anim,
.is-page-hidden .flow__edge--flow,
.is-page-hidden .flow__edge--reject,
.is-page-hidden .ft-cursor,
.is-page-hidden .ft-term__state::before,
.is-page-hidden .ft-line,
.is-page-hidden .ft-tab.is-flash {
  animation-play-state: paused !important;
}