/* ===================================================================
   Catalyst.AI — standalone brand site
   Dark canvas, violet light, glass surfaces. Independent of the
   ApexU design system by design.
   =================================================================== */

:root {
  --void: #05040d;
  --ink: #0a0818;
  --panel: #100d24;
  --panel-2: #16122f;
  --line: rgba(155, 127, 255, 0.16);
  --line-soft: rgba(255, 255, 255, 0.08);

  --violet: #6847ee;
  --violet-bright: #9b7fff;
  --violet-deep: #4a2fc4;
  --cyan: #22d3ee;

  --text: #eceafb;
  --muted: #9d98be;
  --dim: #6f6a90;

  --shell: min(1220px, calc(100% - 48px));
  --r-lg: 24px;
  --r-md: 16px;
  --r-sm: 12px;

  --glow: 0 0 60px rgba(104, 71, 238, 0.35);
  --lift: 0 24px 60px rgba(2, 1, 12, 0.6);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--void);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ambient page glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(104,71,238,0.28), transparent 60%),
    radial-gradient(700px 500px at 92% 8%, rgba(34,211,238,0.10), transparent 60%);
}

main, header, footer { position: relative; z-index: 1; }

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

h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; }

::selection { background: rgba(155,127,255,0.35); color: #fff; }

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.section { padding: 120px 0; }
.section-sm { padding: 84px 0; }

/* --- shared bits -------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(104,71,238,0.10);
  color: var(--violet-bright);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--violet-bright);
  box-shadow: 0 0 0 4px rgba(155,127,255,0.16);
}

.kicker {
  display: block;
  margin-bottom: 18px;
  color: var(--violet-bright);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.h2 { font-size: clamp(2rem, 3.4vw, 3rem); }
.h3 { font-size: clamp(1.5rem, 2.2vw, 1.9rem); }

.lede {
  margin-top: 20px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.75;
}

.body-copy {
  margin-top: 18px;
  max-width: 66ch;
  color: var(--muted);
  line-height: 1.8;
}

.section-head { max-width: 760px; }
.section-head.center {
  margin-inline: auto;
  text-align: center;
}
.section-head.center .lede { margin-inline: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.btn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.btn-primary {
  background: linear-gradient(135deg, var(--violet) 0%, var(--violet-deep) 100%);
  color: #fff;
  box-shadow: 0 14px 34px rgba(104,71,238,0.38);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 44px rgba(104,71,238,0.5);
}

.btn-ghost {
  border-color: var(--line);
  background: rgba(255,255,255,0.03);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: rgba(155,127,255,0.5);
  background: rgba(155,127,255,0.08);
  transform: translateY(-2px);
}

.btn-sm { min-height: 44px; padding: 0 18px; font-size: 0.88rem; }

/* --- header ------------------------------------------------------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.masthead.is-stuck {
  background: rgba(5, 4, 13, 0.82);
  backdrop-filter: blur(18px);
  border-bottom-color: var(--line-soft);
}

.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 82px;
}

.logo { display: flex; align-items: center; }
.logo img { height: 30px; width: auto; }

.masthead-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--muted);
}

.masthead-nav a { position: relative; padding: 6px 0; transition: color 0.2s ease; }
.masthead-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--violet-bright), var(--cyan));
  transition: width 0.25s ease;
}
.masthead-nav a:hover { color: var(--text); }
.masthead-nav a:hover::after { width: 100%; }

.masthead-cta { display: flex; align-items: center; gap: 14px; }

.parent-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--dim);
  font-size: 0.78rem;
  font-weight: 500;
  transition: color 0.2s ease;
}
.parent-link img { height: 17px; width: auto; opacity: 0.75; }
.parent-link:hover { color: var(--muted); }

.burger {
  display: none;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255,255,255,0.03);
  color: var(--text);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}
.burger span {
  width: 18px;
  height: 2px;
  border-radius: 99px;
  background: currentColor;
  transition: 0.25s ease;
}
body.menu-open .burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.menu-open .burger span:nth-child(2) { opacity: 0; }
body.menu-open .burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- hero --------------------------------------------------------- */
.hero {
  position: relative;
  padding: 96px 0 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.30;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.55) 55%, transparent 92%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.55) 55%, transparent 92%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(155,127,255,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(155,127,255,0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(1000px 520px at 50% 12%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(1000px 520px at 50% 12%, #000 20%, transparent 78%);
}

.hero .shell { position: relative; z-index: 2; }

.hero-copy { max-width: 900px; }

.hero h1 {
  margin-top: 26px;
  font-size: clamp(2.7rem, 6vw, 4.6rem);
  letter-spacing: -0.04em;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--violet-bright) 10%, var(--cyan) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  margin-top: 24px;
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.12rem;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 84px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.metric {
  padding: 26px 24px;
  background: rgba(5,4,13,0.6);
}

.metric strong {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(120deg, #fff, var(--violet-bright));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.metric span {
  display: block;
  margin-top: 9px;
  color: var(--dim);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* --- marquee ------------------------------------------------------ */
.marquee {
  position: relative;
  padding: 26px 0;
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.marquee-track {
  display: flex;
  gap: 46px;
  width: max-content;
  animation: slide 38s linear infinite;
}

.marquee-track span {
  display: inline-flex;
  align-items: center;
  gap: 46px;
  color: var(--dim);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.marquee-track span::after {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--violet);
}

@keyframes slide {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* --- split feature ------------------------------------------------ */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.split.reverse > .split-media { order: -1; }

.split-media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--lift);
}

.split-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: 0.92;
}

.split-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(104,71,238,0.20), transparent 55%);
  pointer-events: none;
}

.media-chip {
  position: absolute;
  left: 20px;
  bottom: 20px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(5,4,13,0.72);
  backdrop-filter: blur(12px);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.media-chip i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}

/* --- cards -------------------------------------------------------- */
.card-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 56px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--panel) 0%, rgba(10,8,24,0.7) 100%);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(155,127,255,0.7), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(155,127,255,0.34);
  box-shadow: var(--lift);
}

.card:hover::before { opacity: 1; }

.card-num {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--violet-bright);
}

.card h3 { margin-top: 16px; font-size: 1.16rem; line-height: 1.3; }
.card p { margin-top: 12px; color: var(--muted); font-size: 0.94rem; line-height: 1.7; }

.card-media {
  margin: -30px -30px 24px;
  height: 168px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
  transition: transform 0.6s ease, opacity 0.3s ease;
}

.card:hover .card-media img { transform: scale(1.05); opacity: 1; }

.icon-badge {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  border: 1px solid var(--line);
  background: rgba(104,71,238,0.14);
  color: var(--violet-bright);
}

.icon-badge svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

/* --- discipline grid --------------------------------------------- */
.disciplines {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 52px;
}

.discipline {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: rgba(16,13,36,0.6);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.98rem;
  font-weight: 600;
  transition: 0.25s ease;
}

.discipline b {
  font-family: "Inter", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--violet-bright);
  letter-spacing: 0.08em;
}

.discipline:hover {
  border-color: rgba(155,127,255,0.4);
  background: rgba(104,71,238,0.12);
  transform: translateY(-3px);
}

/* --- method strip ------------------------------------------------- */
.method {
  position: relative;
  border-radius: 30px;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--panel);
}

.method-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.method-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
}

.method-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(5,4,13,0.94) 20%, rgba(5,4,13,0.62) 70%, rgba(74,47,196,0.35) 100%);
}

.method-inner {
  position: relative;
  z-index: 1;
  padding: 64px;
}

.method-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin-top: 44px;
  background: var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.method-item {
  padding: 26px 20px;
  background: rgba(5,4,13,0.72);
  transition: background 0.25s ease;
}

.method-item:hover { background: rgba(104,71,238,0.16); }

.method-item strong {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  font-weight: 700;
}

.method-item span {
  display: block;
  margin-top: 8px;
  color: var(--dim);
  font-size: 0.84rem;
  line-height: 1.55;
}

/* --- accreditations ---------------------------------------------- */
.accred {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 44px;
}

.accred-item {
  display: grid;
  place-items: center;
  width: 178px;
  height: 92px;
  padding: 18px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: #fff;
  transition: 0.25s ease;
}

.accred-item img { max-height: 46px; width: auto; object-fit: contain; }
.accred-item:hover { transform: translateY(-4px); box-shadow: var(--glow); }

/* --- contact ------------------------------------------------------ */
.contact {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  padding: 64px;
  border-radius: 30px;
  border: 1px solid var(--line);
  background:
    radial-gradient(700px 300px at 82% 12%, rgba(104,71,238,0.30), transparent 62%),
    linear-gradient(160deg, var(--panel-2), var(--ink));
  box-shadow: var(--lift);
  overflow: hidden;
}

.contact::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -90px;
  width: 320px;
  height: 320px;
  background: url("img/catalyst-ai-logo-icon-w.png") center/contain no-repeat;
  opacity: 0.06;
  pointer-events: none;
}

.contact-list { display: grid; gap: 20px; }

.contact-row {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  align-items: start;
}

.contact-row .icon-badge { width: 44px; height: 44px; border-radius: 12px; }

.contact-row strong {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}

.contact-row span,
.contact-row a {
  display: block;
  margin-top: 4px;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.55;
}

.contact-row a:hover { color: var(--violet-bright); }

/* --- footer ------------------------------------------------------- */
.site-footer {
  padding: 64px 0 34px;
  border-top: 1px solid var(--line-soft);
  background: rgba(5,4,13,0.85);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(0, 1fr));
  gap: 40px;
}

.footer-top img.footer-logo { height: 28px; width: auto; }

.footer-top p {
  margin-top: 16px;
  max-width: 34ch;
  color: var(--dim);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col strong {
  display: block;
  margin-bottom: 14px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-col a {
  display: block;
  margin-top: 10px;
  color: var(--dim);
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

.footer-col a:hover { color: var(--violet-bright); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
  color: var(--dim);
  font-size: 0.82rem;
}

.footer-base a { color: var(--muted); }
.footer-base a:hover { color: var(--violet-bright); }

/* --- reveal animation --------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(.2,.7,.3,1), transform 0.7s cubic-bezier(.2,.7,.3,1);
}

[data-reveal].in { opacity: 1; transform: none; }

/* --- responsive --------------------------------------------------- */
@media (max-width: 1040px) {
  :root { --shell: min(1220px, calc(100% - 36px)); }
  .split { grid-template-columns: 1fr; gap: 38px; }
  .split.reverse > .split-media { order: 0; }
  .card-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .disciplines { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .method-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .method-inner { padding: 44px; }
  .contact { grid-template-columns: 1fr; gap: 38px; padding: 44px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .section { padding: 84px 0; }
  .masthead-nav,
  .parent-link { display: none; }
  .burger { display: inline-flex; }

  .masthead.has-menu .masthead-nav {
    position: fixed;
    left: 18px;
    right: 18px;
    top: 88px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: rgba(10,8,24,0.97);
    backdrop-filter: blur(20px);
    box-shadow: var(--lift);
  }

  body.menu-open .masthead.has-menu .masthead-nav { display: flex; }

  .masthead-nav a {
    min-height: 50px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    color: var(--text);
    font-size: 1rem;
  }

  .masthead-nav a::after { display: none; }

  .hero { padding-top: 64px; }
  .hero-grid {
    background-size: 44px 44px;
    opacity: 0.6;
  }
  .hero-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 56px; }
  .card-row { grid-template-columns: 1fr; }
  .disciplines { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .method-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 560px) {
  .method-inner { padding: 30px 22px; }
  .method-list { grid-template-columns: 1fr; }
  .contact { padding: 30px 22px; }
  .card { padding: 24px; }
  .card-media { margin: -24px -24px 20px; height: 148px; }
  .accred-item { width: 144px; height: 80px; }
  .hero-actions .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .marquee-track { animation: none; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0.01ms !important; }
}