/* ────────────────────────────────────────────────────────────
   AXESS VERTICAL PAGE — shared stylesheet for /compute.html and
   /energy.html. Extends the axess-xyz design tokens with a scrollable
   long-form layout suitable for iframe embedding in the AXESS OS
   desktop web-window.

   Design principles:
   - Same tokens as index.html (JetBrains Mono / General Sans,
     deep-navy background, hairline accents)
   - Section spacing and card patterns modeled on axessmobility.com
   - Per-vertical accent driven by <body data-vert="compute|energy">
   ──────────────────────────────────────────────────────────── */

:root {
  --bg:       #070c14;
  --bg-deep:  #04070c;
  --bg-card:  rgba(255, 255, 255, 0.025);
  --bg-card-2: rgba(255, 255, 255, 0.04);
  --ink:      #e6f1ee;
  --ink-dim:  #6b8590;
  --ink-mute: #4a626d;
  --hairline: rgba(70, 210, 220, 0.10);
  --hairline-strong: rgba(70, 210, 220, 0.22);

  /* Default accent — overridden per vertical below */
  --accent:    #46d2dc;
  --accent-2:  #2b8fe0;
  --accent-3:  #22b573;

  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-sans: "General Sans", ui-sans-serif, system-ui, -apple-system,
               "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --wrap: 1120px;
  --pad-x: clamp(1.25rem, 4vw, 3rem);
}

/* Per-vertical accent overrides */
body[data-vert="compute"] {
  --accent:   #22b573;      /* compute green */
  --accent-2: #12a5a5;
  --accent-3: #46d2dc;
}
body[data-vert="energy"] {
  --accent:   #12a5a5;      /* energy teal */
  --accent-2: #22b573;
  --accent-3: #46d2dc;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%,
      color-mix(in srgb, var(--accent) 6%, transparent) 0%,
      transparent 70%),
    linear-gradient(180deg, #0b131f 0%, var(--bg) 40%, var(--bg-deep) 100%);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Subtle grid backdrop — very faint so it feels like the AXESS OS grid
   without competing with the Tron canvas on the parent page. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(color-mix(in srgb, var(--accent) 8%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--accent) 8%, transparent) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 40%, transparent 80%);
  opacity: 0.35;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

/* ──────────────────────────────────────────────────────────
   Utility bar — top strip like axessmobility.com's AXESS LANE™
   ────────────────────────────────────────────────────────── */
.util {
  position: relative;
  z-index: 2;
  background:
    linear-gradient(90deg,
      color-mix(in srgb, var(--accent) 45%, #0b131f) 0%,
      color-mix(in srgb, var(--accent-2) 55%, #0b131f) 50%,
      color-mix(in srgb, var(--accent-3) 45%, #0b131f) 100%);
  padding: 0.55rem var(--pad-x);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.92);
}
.util a { border-bottom: 1px dashed rgba(255, 255, 255, 0.25); }
.util a:hover { border-color: rgba(255, 255, 255, 0.6); }

/* ──────────────────────────────────────────────────────────
   Header
   ────────────────────────────────────────────────────────── */
.hdr {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 1rem var(--pad-x);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.hdr__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink);
}
.hdr__brand .brand-x {
  width: 22px; height: 22px;
  color: var(--accent);
}
.hdr__brand sup {
  font-size: 8px;
  letter-spacing: 0;
  vertical-align: super;
  color: var(--ink-dim);
  margin-left: 2px;
}
.hdr__nav {
  display: flex;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.hdr__nav a {
  padding: 0.35em 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.hdr__nav a:hover { color: var(--ink); border-color: var(--accent); }
.hdr__nav a[aria-current="page"] { color: var(--ink); }

@media (max-width: 640px) {
  .hdr__nav { display: none; }
}

/* ──────────────────────────────────────────────────────────
   Section frame
   ────────────────────────────────────────────────────────── */
.section {
  position: relative;
  z-index: 1;
  padding: clamp(4rem, 9vw, 7rem) var(--pad-x);
}
.section--tight { padding-block: clamp(3rem, 6vw, 4.5rem); }
.wrap { max-width: var(--wrap); margin: 0 auto; }

/* Section eyebrow */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 0 3px color-mix(in srgb, currentColor 20%, transparent),
              0 0 8px 0 color-mix(in srgb, currentColor 65%, transparent);
}

.h1 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(2.1rem, 5.5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 1.25rem;
  max-width: 20ch;
}
.h1 .accent { color: var(--accent); }

.h2 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(1.55rem, 3.5vw, 2.35rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 1rem;
}

.lead {
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.6;
  color: color-mix(in srgb, var(--ink) 78%, transparent);
  max-width: 62ch;
  margin: 0;
}
.body {
  font-size: 0.98rem;
  line-height: 1.62;
  color: var(--ink-dim);
  max-width: 60ch;
  margin: 0;
}

/* Trademark symbol */
sup.tm {
  font-size: 0.55em;
  letter-spacing: 0;
  vertical-align: super;
  color: var(--ink-dim);
}

/* ──────────────────────────────────────────────────────────
   Hero
   ────────────────────────────────────────────────────────── */
.hero {
  min-height: 78vh;
  display: flex;
  align-items: center;
  padding-block: clamp(4rem, 8vw, 7rem);
  border-bottom: 1px solid var(--hairline);
  position: relative;
  overflow: hidden;
}
.hero__wrap { position: relative; z-index: 2; }
.hero__mark {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 2rem;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink);
}
.hero__mark .brand-x {
  width: 36px; height: 36px;
  color: var(--accent);
}

/* Glowing X watermark behind hero content */
.hero__watermark {
  position: absolute;
  right: -8%;
  top: 50%;
  transform: translateY(-50%);
  width: min(58vw, 640px);
  aspect-ratio: 1;
  color: var(--accent);
  opacity: 0.10;
  z-index: 1;
  pointer-events: none;
  filter: drop-shadow(0 0 40px color-mix(in srgb, var(--accent) 40%, transparent));
}

/* Data readout under hero — mono, tabular-ish */
.readout {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem 2rem;
  max-width: 620px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-top: 1px solid var(--hairline);
  padding-top: 1.5rem;
}
.readout__k { display: block; margin-bottom: 0.35rem; color: var(--ink-mute); }
.readout__v { color: var(--ink); font-size: 15px; letter-spacing: 0.06em; }
@media (max-width: 540px) {
  .readout { grid-template-columns: 1fr 1fr; }
}

/* ──────────────────────────────────────────────────────────
   Three-up cards (Platform section)
   ────────────────────────────────────────────────────────── */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: 1fr; }
}

.card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}
.card:hover {
  border-color: var(--hairline-strong);
  background: var(--bg-card-2);
}
.card__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.card__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.2rem;
  line-height: 1.25;
  color: var(--ink);
  margin: 0 0 0.6rem;
}
.card__body {
  font-size: 0.94rem;
  line-height: 1.55;
  color: var(--ink-dim);
  margin: 0;
}

/* ──────────────────────────────────────────────────────────
   Deep-feature cards — sub-items grouped inside a card
   ────────────────────────────────────────────────────────── */
.feature-card {
  padding: 2rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  position: relative;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 42px; height: 1px;
  background: var(--accent);
}
.feature-card__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--ink);
  margin: 0 0 1.4rem;
}
.feature-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.feature-card__list li {
  padding-left: 0;
}
.feature-card__list dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.feature-card__list dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--ink-dim);
}
.feature-card__list--plain li {
  font-size: 0.94rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--ink) 75%, transparent);
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
}
.feature-card__list--plain li::before {
  content: "+";
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  flex-shrink: 0;
  transform: translateY(-1px);
}

/* ──────────────────────────────────────────────────────────
   CTA / Contact section
   ────────────────────────────────────────────────────────── */
.cta {
  text-align: center;
  padding: clamp(4rem, 8vw, 6rem) var(--pad-x);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background:
    radial-gradient(ellipse 60% 100% at 50% 100%,
      color-mix(in srgb, var(--accent) 8%, transparent) 0%,
      transparent 70%);
}
.cta .h2 { max-width: 22ch; margin-inline: auto; }
.cta .lead { margin-inline: auto; margin-top: 0.75rem; text-align: center; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85em 1.6em;
  background: var(--accent);
  color: #04121a;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.25s ease, filter 0.15s ease;
  margin-top: 2rem;
}
.btn:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px -8px color-mix(in srgb, var(--accent) 55%, transparent);
}
.btn__arrow { transition: transform 0.2s ease; }
.btn:hover .btn__arrow { transform: translateX(2px); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--hairline-strong);
}
.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--accent);
  box-shadow: none;
}

/* ──────────────────────────────────────────────────────────
   Footer
   ────────────────────────────────────────────────────────── */
.foot {
  padding: 3.5rem var(--pad-x) 2rem;
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.foot__row {
  max-width: var(--wrap);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.foot__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
}
.foot__brand .brand-x {
  width: 18px; height: 18px;
  color: var(--accent);
}
.foot__links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.foot__links a {
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.foot__links a:hover { color: var(--ink); border-color: var(--accent); }
.foot__legal {
  max-width: var(--wrap);
  margin: 1.5rem auto 0;
  color: var(--ink-mute);
  font-size: 10px;
  letter-spacing: 0.14em;
}

/* ──────────────────────────────────────────────────────────
   Iframe-embed adjustments — when the page is loaded inside the
   web-window, drop redundant chrome. We detect via ?embed=1.
   The parent web-window sets its own scrollbar treatment.
   ────────────────────────────────────────────────────────── */
body.is-embedded .util { display: none; }
body.is-embedded .hero { min-height: calc(100vh - 60px); }

/* Cyan scrollbar — wider (8px) + higher opacity so it reads on the OS's
   gradient backgrounds without disappearing into the ambient glow. */
html { scrollbar-width: thin; scrollbar-color: rgba(140, 220, 230, 0.45) rgba(0, 0, 0, 0.25); }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: rgba(0, 0, 0, 0.25); border-radius: 999px; }
::-webkit-scrollbar-thumb {
  background: rgba(140, 220, 230, 0.45);
  border-radius: 999px;
  transition: background 0.2s ease;
}
::-webkit-scrollbar-thumb:hover { background: rgba(140, 220, 230, 0.70); }
