/* ============================================================
   Systellar Space — synapse™  |  BLUEPRINT / DIGITAL BACKBONE
   Production variant-1
   ============================================================ */

:root {
  --white: #FFFFFF;
  --tint-1: #F0F7F7;
  --tint-2: #F0F4F7;
  --tint-3: #E9EFF4;
  --border: #E0E7E7;
  --border-2: #D4DAE0;
  --ink: #0A151F;
  --slate: #4C5A6B;
  --muted: #667481;
  --blue: #0033FF;
  --blue-deep: #1D4ED8;
  --violet: #5500FF;

  --r-6: 6px;
  --r-12: 12px;
  --r-16: 16px;
  --r-pill: 999px;

  --shadow-card: 0 1px 2px rgba(10,21,31,.04), 0 8px 24px rgba(10,21,31,.05);
  --shadow-float: 0 12px 32px rgba(0,51,255,.10);

  --container: 1200px;
  --gutter: 24px;
  --spine-x: clamp(24px, 6vw, 96px);

  --font: "Poppins", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (min-width: 1024px) { :root { --gutter: 48px; } }

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font);
  font-weight: 400;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.12; letter-spacing: -0.02em; color: var(--ink); }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute; left: 16px; top: -60px;
  background: var(--blue); color: #fff; padding: 10px 16px;
  border-radius: var(--r-6); z-index: 1000; transition: top .2s ease;
}
.skip-link:focus { top: 16px; }

/* ---------- layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  /* offset content rightward of spine on wide screens handled via padding-left on sections */
}

.section { padding-block: clamp(64px, 9vw, 128px); position: relative; }
.section--strip { padding-block: clamp(28px, 4vw, 40px); background: var(--tint-2); border-block: 1px solid var(--border); }
.section--tint1 { background: var(--tint-1); }
.section--tint2 { background: var(--tint-2); }

/* give breathing room for the spine rail on larger screens */
@media (min-width: 860px) {
  .section .container,
  .section--strip .container,
  .nav__inner,
  .footer__inner,
  .footer__bottom { padding-left: calc(var(--spine-x) + 40px); }
}

/* ---------- shared bits ---------- */
.eyebrow {
  position: relative;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .72rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 18px;
}
.tie { display: none; }
@media (min-width: 860px) {
  .tie {
    display: block;
    position: absolute;
    top: 50%;
    right: 100%;
    width: 24px;
    height: 1px;
    background: var(--blue);
    transform: translateY(-50%);
    margin-right: 8px;
    opacity: .5;
  }
}

.sec-head { max-width: 720px; margin-bottom: clamp(40px, 5vw, 64px); }
.sec-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
.sec-intro { margin-top: 18px; color: var(--slate); font-size: 1.06rem; max-width: 640px; }

.grad {
  background: linear-gradient(100deg, var(--blue) 0%, var(--violet) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font); font-weight: 500; font-size: .98rem;
  padding: 13px 24px; border-radius: var(--r-pill);
  border: 1px solid transparent; cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--blue); color: #fff; }
.btn--primary:hover { background: var(--blue-deep); transform: translateY(-1px); box-shadow: var(--shadow-float); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--border-2); }
.btn--ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn--ghost-dark { color: #fff; border-color: rgba(255,255,255,.28); }
.btn--ghost-dark:hover { border-color: #fff; color: #fff; background: rgba(255,255,255,.06); }
.btn--block { width: 100%; justify-content: center; }
.btn--arrow .arrow { transition: transform .2s ease; }
.btn--arrow:hover .arrow { transform: translateX(4px); }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  transition: box-shadow .25s ease, border-color .25s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled { border-bottom-color: var(--border); box-shadow: 0 6px 20px rgba(10,21,31,.05); }
.nav__inner {
  max-width: var(--container); margin-inline: auto;
  padding-inline: var(--gutter);
  height: 68px; display: flex; align-items: center; gap: 32px;
}
.nav__logo { height: 24px; width: auto; }
.nav__links { display: flex; gap: 30px; margin-left: 12px; }
.nav__links a {
  position: relative; color: var(--slate); font-size: .95rem; font-weight: 500;
  padding: 4px 2px;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 100%;
  background: var(--blue); transform: scaleX(0); transform-origin: left;
  transition: transform .25s ease;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__actions { margin-left: auto; }
.nav__burger {
  display: none; margin-left: auto; background: none; border: 0; cursor: pointer;
  width: 40px; height: 40px; flex-direction: column; justify-content: center; gap: 5px; align-items: center;
}
.nav__burger span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s, opacity .25s; }
.nav.is-open .nav__burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav__burger span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__sheet {
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(12px);
}
.nav__sheet nav { display: flex; flex-direction: column; padding: 16px var(--gutter) 24px; gap: 4px; }
.nav__sheet a { padding: 12px 4px; color: var(--ink); font-weight: 500; border-bottom: 1px solid var(--border); }
.nav__sheet a.btn { border-bottom: 0; margin-top: 12px; color: #fff; }

@media (max-width: 860px) {
  .nav__links, .nav__actions { display: none; }
  .nav__burger { display: flex; }
}

/* ============================================================
   SPINE / BACKBONE
   ============================================================ */
.spine {
  position: fixed;
  left: var(--spine-x); top: 0; bottom: 0;
  width: 2px; z-index: 40;
  pointer-events: none;
}
.spine__svg { position: absolute; inset: 0; width: 2px; height: 100%; overflow: visible; }
.spine__track { stroke: var(--border-2); stroke-width: 1; }
.spine__progress {
  stroke: var(--blue); stroke-width: 1.5;
  stroke-dasharray: var(--spine-len, 4000);
  stroke-dashoffset: var(--spine-len, 4000);
  transition: stroke .4s ease;
}
.spine__nodes { position: absolute; inset: 0; }
.spine__node {
  position: absolute; left: 1px; transform: translate(-50%, -50%);
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--white); border: 1.5px solid var(--border-2);
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease, transform .3s ease;
}
.spine__node.is-active {
  background: var(--blue); border-color: var(--blue);
  box-shadow: 0 0 0 5px rgba(0,51,255,.14);
  transform: translate(-50%, -50%) scale(1.15);
}
/* invert over dark section */
.spine.is-invert .spine__track { stroke: rgba(255,255,255,.28); }
.spine.is-invert .spine__progress { stroke: #fff; }
.spine.is-invert .spine__node { background: var(--ink); border-color: rgba(255,255,255,.45); }
.spine.is-invert .spine__node.is-active { background: #fff; border-color: #fff; box-shadow: 0 0 0 5px rgba(255,255,255,.20); }

@media (max-width: 860px) { .spine { display: none; } }
@media (prefers-reduced-motion: reduce) {
  .spine__progress { transition: none; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero { padding-top: clamp(56px, 8vw, 96px); overflow: hidden; }
.hero__grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    radial-gradient(rgba(0,51,255,.10) 1px, transparent 1.4px),
    linear-gradient(to right, rgba(10,21,31,.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10,21,31,.04) 1px, transparent 1px);
  background-size: 28px 28px, 28px 28px, 28px 28px;
  -webkit-mask-image: radial-gradient(120% 90% at 50% 30%, #000 35%, transparent 80%);
  mask-image: radial-gradient(120% 90% at 50% 30%, #000 35%, transparent 80%);
}
.hero__inner { position: relative; z-index: 1; text-align: left; max-width: 880px; }
.hero__title {
  font-size: clamp(2.3rem, 6vw, 4.1rem);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1.05;
  margin-bottom: 22px;
}
.hero__sub { font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: var(--slate); max-width: 620px; margin-bottom: 32px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: clamp(48px, 6vw, 72px); }

/* blueprint frame */
.frame {
  position: relative; z-index: 1; margin: 0;
  border: 1px solid var(--border-2); border-radius: var(--r-16);
  background: var(--white); box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow .3s ease, transform .3s ease;
}
.frame__rail {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 16px; border-bottom: 1px solid var(--border);
  background: var(--tint-2);
}
.frame__rail span { width: 10px; height: 10px; border-radius: 50%; background: var(--border-2); }
.frame__rail span:nth-child(1) { background: #ff5f57; opacity: .55; }
.frame__rail span:nth-child(2) { background: #febc2e; opacity: .55; }
.frame__rail span:nth-child(3) { background: #28c840; opacity: .55; }
.frame img { width: 100%; height: auto; display: block; }
.frame:hover { box-shadow: var(--shadow-card), var(--shadow-float); transform: translateY(-4px); }

/* ============================================================
   BACKED BY
   ============================================================ */
.backers__inner { display: flex; align-items: center; gap: clamp(20px, 4vw, 48px); flex-wrap: wrap; }
.backers__label {
  font-family: var(--mono); text-transform: uppercase; letter-spacing: .14em;
  font-size: .7rem; font-weight: 600; color: var(--muted); white-space: nowrap;
}
.backers__label--dark { color: rgba(255,255,255,.6); }
.backers__row { display: flex; align-items: center; gap: clamp(14px, 2.5vw, 28px); flex-wrap: wrap; }
.backer--techstars { display: inline-flex; align-items: center; gap: 10px; }
.backer__logo { height: 22px; width: auto; }
.backer__logo--inv { filter: brightness(0) invert(1); opacity: .92; }
.backer__div { width: 1px; height: 28px; background: var(--border-2); }
.backer__div--dark { background: rgba(255,255,255,.18); }
.pill--year {
  display: inline-flex; align-items: center; height: 22px; padding: 0 9px;
  border-radius: var(--r-pill); background: var(--blue); color: #fff;
  font-size: .72rem; font-weight: 600; letter-spacing: .02em;
}
.wordmark {
  font-weight: 600; font-size: 1rem; color: var(--ink); opacity: .7;
  letter-spacing: -0.01em; transition: opacity .2s ease;
  display: inline-flex; align-items: center; height: 28px;
}
.wordmark:hover { opacity: 1; }
.wordmark--dark { color: rgba(255,255,255,.78); opacity: .7; }
.wordmark--dark:hover { color: #fff; opacity: 1; }

/* ============================================================
   PROBLEM CARDS
   ============================================================ */
.cards4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.pcard {
  position: relative; background: var(--white);
  border: 1px solid var(--border); border-radius: var(--r-12);
  padding: 26px 24px 28px;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  overflow: hidden;
}
.pcard::before {
  content: ""; position: absolute; left: 0; top: 0; height: 2px; width: 100%;
  background: var(--blue); transform: scaleX(0); transform-origin: left;
  transition: transform .25s ease;
}
.pcard:hover { transform: translateY(-5px); box-shadow: var(--shadow-card), var(--shadow-float); border-color: var(--border-2); }
.pcard:hover::before { transform: scaleX(1); }
.pcard__icon {
  display: inline-flex; width: 44px; height: 44px; margin-bottom: 18px;
  align-items: center; justify-content: center;
  border: 1px solid var(--border-2); border-radius: var(--r-12);
  color: var(--blue); background: var(--tint-1);
}
.pcard__icon svg { width: 22px; height: 22px; }
.pcard h3 { font-size: 1.08rem; margin-bottom: 8px; }
.pcard p { color: var(--slate); font-size: .95rem; }

@media (max-width: 1024px) { .cards4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cards4 { grid-template-columns: 1fr; } }

/* ============================================================
   METRICS
   ============================================================ */
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.metric {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--r-16);
  padding: 32px 28px; box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease;
}
.metric:hover { transform: translateY(-4px); box-shadow: var(--shadow-card), var(--shadow-float); }
.metric__big {
  font-weight: 700; font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  line-height: 1.18; letter-spacing: -0.02em; color: var(--ink); margin-bottom: 18px;
}
.metric__accent { color: var(--blue); }
.metric__label {
  font-family: var(--mono); text-transform: uppercase; letter-spacing: .12em;
  font-size: .68rem; font-weight: 600; color: var(--muted); margin-bottom: 8px;
}
.metric__sub { color: var(--slate); font-size: .95rem; }
@media (max-width: 1024px) { .metrics { grid-template-columns: 1fr; } }

/* ============================================================
   INDUSTRIES MARQUEE
   ============================================================ */
.industries { padding-bottom: clamp(64px, 9vw, 128px); }
.industries__head { margin-bottom: 36px; }
.marquee {
  position: relative; overflow: hidden; width: 100%;
  -webkit-mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: flex; align-items: center; gap: 18px; width: max-content;
  animation: marquee 36s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.chip {
  display: inline-flex; align-items: center; padding: 11px 22px;
  border: 1px solid var(--border-2); border-radius: var(--r-pill);
  font-weight: 500; font-size: 1rem; color: var(--ink); background: var(--white);
  white-space: nowrap; transition: border-color .2s ease, color .2s ease;
}
.chip:hover { border-color: var(--blue); color: var(--blue); }
.dot { width: 5px; height: 5px; border-radius: 50%; background: var(--blue); flex: 0 0 auto; }
@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; flex-wrap: wrap; width: 100%; justify-content: center; }
  .marquee { -webkit-mask-image: none; mask-image: none; }
}

/* ============================================================
   FEATURES (zig-zag)
   ============================================================ */
.feature__inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 88px); align-items: center;
}
.feature--media-left .feature__text { order: 2; }
.feature--media-left .feature__media { order: 1; }
.feature__text h3 { font-size: clamp(1.5rem, 2.8vw, 2.1rem); margin-bottom: 16px; }
.feature__lede { color: var(--slate); font-size: 1.06rem; margin-bottom: 24px; }
.ticks li {
  position: relative; padding-left: 26px; margin-bottom: 12px;
  color: var(--ink); font-size: .98rem;
}
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 9px; height: 9px; border-radius: 2px;
  background: var(--blue); box-shadow: 0 0 0 3px rgba(0,51,255,.12);
}
@media (max-width: 860px) {
  .feature__inner { grid-template-columns: 1fr; gap: 36px; }
  .feature--media-left .feature__text,
  .feature--media-left .feature__media { order: initial; }
  .feature__media { order: -1; }
  .feature--media-left .feature__media { order: -1; }
}

/* CSS mocks inside frames */
.mock { background: var(--white); padding: 16px 16px 20px; }
.mock__bar { display: flex; gap: 8px; margin-bottom: 14px; }
.mock__chip {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .08em; text-transform: uppercase;
  padding: 5px 11px; border-radius: var(--r-pill);
  background: var(--blue); color: #fff; font-weight: 600;
}
.mock__chip--ghost { background: var(--tint-2); color: var(--muted); border: 1px solid var(--border); }

.reqtable { width: 100%; border-collapse: collapse; font-size: .82rem; }
.reqtable th, .reqtable td { text-align: left; padding: 10px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
.reqtable thead th {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); font-weight: 600; border-bottom: 1px solid var(--border-2);
}
.reqtable td:first-child { font-family: var(--mono); color: var(--blue); font-weight: 600; white-space: nowrap; }
.reqtable td:nth-child(2) { color: var(--slate); }
.reqtable tbody tr:last-child td { border-bottom: 0; }
.tag {
  display: inline-flex; align-items: center; padding: 3px 9px; border-radius: var(--r-pill);
  font-size: .68rem; font-weight: 600; white-space: nowrap;
}
.tag--ok { background: rgba(0,51,255,.10); color: var(--blue); }
.tag--prog { background: rgba(85,0,255,.10); color: var(--violet); }
.tag--open { background: var(--tint-3); color: var(--muted); }

.doc { padding: 6px 4px; }
.doc__h { font-weight: 600; font-size: .95rem; color: var(--ink); margin-bottom: 14px; }
.doc__line { height: 9px; border-radius: 4px; background: var(--tint-3); margin-bottom: 9px; }
.doc__line--short { width: 55%; }
.doc__line--mid { width: 72%; }
.doc__field {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 12px; margin: 8px 0; border: 1px solid var(--border);
  border-radius: var(--r-6); background: var(--tint-1); font-size: .8rem;
}
.doc__field span { font-family: var(--mono); text-transform: uppercase; letter-spacing: .08em; font-size: .64rem; color: var(--muted); }
.doc__field b { color: var(--ink); font-family: var(--mono); font-size: .78rem; }
.doc__pass { color: var(--blue); }

/* ============================================================
   CTA (DARK)
   ============================================================ */
.cta.is-dark { background: var(--ink); color: #fff; overflow: hidden; }
.cta__grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px;
  -webkit-mask-image: radial-gradient(120% 100% at 50% 40%, #000 30%, transparent 78%);
  mask-image: radial-gradient(120% 100% at 50% 40%, #000 30%, transparent 78%);
}
.cta__inner { position: relative; z-index: 1; max-width: 860px; }
.cta__backers { margin-bottom: clamp(40px, 6vw, 64px); }
.backers__row--lg { gap: clamp(18px, 3vw, 36px); margin-top: 18px; }
.backers__row--lg .backer__logo { height: 26px; }
.backers__row--lg .wordmark { font-size: 1.18rem; }
.cta__title { font-size: clamp(2rem, 4.4vw, 3.2rem); font-weight: 700; color: #fff; letter-spacing: -0.03em; margin-bottom: 32px; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: var(--tint-3); border-top: 1px solid var(--border); padding-top: clamp(56px, 7vw, 80px); }
.footer__inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px;
  padding-bottom: 48px;
}
.footer__logo { height: 24px; width: auto; margin-bottom: 18px; }
.footer__desc { color: var(--slate); font-size: .95rem; max-width: 320px; margin-bottom: 14px; }
.footer__addr { color: var(--muted); font-size: .88rem; font-family: var(--mono); letter-spacing: .02em; }
.footer__col h4 {
  font-family: var(--mono); text-transform: uppercase; letter-spacing: .12em;
  font-size: .68rem; color: var(--muted); margin-bottom: 16px; font-weight: 600;
}
.footer__col a { display: block; color: var(--slate); font-size: .95rem; padding: 5px 0; transition: color .2s ease; }
.footer__col a:hover { color: var(--blue); }
.footer__credit p { color: var(--slate); font-size: .92rem; }
.footer__bottom {
  border-top: 1px solid var(--border); padding-block: 24px;
}
.footer__bottom p { color: var(--muted); font-size: .85rem; }
.footer__bottom .lower { text-transform: none; }
@media (max-width: 860px) { .footer__inner { grid-template-columns: 1fr 1fr; gap: 32px; } .footer__brand { grid-column: 1 / -1; } }
@media (max-width: 640px) { .footer__inner { grid-template-columns: 1fr; } }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none; }
}