:root {
  --bg: #07090d;
  --bg-elevated: #0e1218;
  --ink: #eef2f7;
  --ink-muted: rgba(238, 242, 247, 0.68);
  --ink-faint: rgba(238, 242, 247, 0.42);
  --line: rgba(238, 242, 247, 0.12);
  --accent: #4f8cff;
  --accent-hover: #73a4ff;
  --accent-soft: rgba(79, 140, 255, 0.16);
  --accent-ink: #06101f;
  --glow: rgba(79, 140, 255, 0.28);
  --glow-soft: rgba(56, 110, 220, 0.16);
  --font-display: "Bricolage Grotesque", Georgia, serif;
  --font-body: "Figtree", system-ui, sans-serif;
  --max: 72rem;
  --pad: clamp(1.25rem, 4vw, 2.75rem);
  --radius: 0.85rem;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: inherit;
}

/* Atmosphere — full-bleed visual plane */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(80% 55% at 50% -10%, var(--glow), transparent 60%),
    radial-gradient(60% 45% at 90% 20%, rgba(99, 160, 255, 0.18), transparent 55%),
    radial-gradient(50% 40% at 10% 60%, var(--glow-soft), transparent 50%),
    linear-gradient(180deg, #0a1018 0%, var(--bg) 45%, #05070a 100%);
}

.atmosphere__aurora {
  position: absolute;
  inset: -20% -10% auto;
  height: 70vh;
  background:
    radial-gradient(ellipse 50% 40% at 30% 40%, rgba(79, 140, 255, 0.22), transparent 70%),
    radial-gradient(ellipse 45% 35% at 70% 30%, rgba(56, 189, 248, 0.14), transparent 70%);
  filter: blur(8px);
  animation: aurora-drift 18s var(--ease-out) infinite alternate;
}

.atmosphere__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(238, 242, 247, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(238, 242, 247, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 55% at 50% 20%, #000 20%, transparent 75%);
  transform: perspective(600px) rotateX(52deg) translateY(-8%);
  transform-origin: center top;
  animation: grid-pulse 10s ease-in-out infinite;
}

.atmosphere__meteors span {
  position: absolute;
  top: -10%;
  width: 2px;
  height: 80px;
  background: linear-gradient(to bottom, transparent, rgba(244, 241, 234, 0.55), transparent);
  opacity: 0;
  transform: rotate(25deg);
  animation: meteor 9s linear infinite;
}

.atmosphere__meteors span:nth-child(1) {
  left: 18%;
  animation-delay: 1.2s;
}

.atmosphere__meteors span:nth-child(2) {
  left: 56%;
  animation-delay: 4.5s;
  height: 60px;
}

.atmosphere__meteors span:nth-child(3) {
  left: 78%;
  animation-delay: 7.1s;
}

/* Nav — full-bleed bar, fluid inner content */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  backdrop-filter: blur(14px);
  background: linear-gradient(
    to bottom,
    rgba(7, 9, 13, 0.92),
    rgba(7, 9, 13, 0.72) 70%,
    rgba(7, 9, 13, 0.35)
  );
  border-bottom: 1px solid var(--line);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 1rem var(--pad);
}

.nav__brand,
.footer__brand,
.cta__brand,
.hero__brand {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.nav__brand {
  font-size: 1.2rem;
}

.nav__links {
  display: none;
  gap: 1.5rem;
}

.nav__links a {
  text-decoration: none;
  color: var(--ink-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 160ms ease;
}

.nav__links a:hover {
  color: var(--ink);
}

.nav__cta {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  transition: transform 160ms ease, background-color 160ms ease;
}

.nav__cta:hover {
  transform: translateY(-1px);
  background: var(--accent-hover);
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

/* Hero — brand first, one composition */
.hero {
  min-height: calc(100vh - 4.25rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3.5rem, 12vh, 7rem) var(--pad) clamp(4rem, 12vh, 7rem);
}

.hero__brand {
  margin: 0 0 1.1rem;
  font-size: clamp(3.4rem, 11vw, 7rem);
  line-height: 0.9;
  color: var(--ink);
  text-shadow: 0 0 80px var(--glow);
}

.hero__lines {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.85rem;
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.hero__lines li {
  color: var(--ink-faint);
  transition: color 420ms var(--ease-out);
}

.hero__lines li.is-active {
  color: var(--accent);
}

.hero__lines li:not(:last-child)::after {
  content: "·";
  margin-left: 0.85rem;
  color: var(--ink-faint);
  font-weight: 500;
}

.hero__title {
  margin: 0 0 1.15rem;
  max-width: 14ch;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.8vw, 3.35rem);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.hero__lede {
  margin: 0 0 2rem;
  max-width: 38rem;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--ink-muted);
  line-height: 1.6;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.7rem 1.25rem;
  border-radius: 0.7rem;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--ink);
  color: var(--bg);
}

.btn--primary:hover {
  background: #fff;
}

.btn__beam {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(79, 140, 255, 0.95),
    transparent
  );
  background-size: 200% 100%;
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: beam 2.8s linear infinite;
  pointer-events: none;
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: rgba(244, 241, 234, 0.32);
  background: rgba(244, 241, 234, 0.04);
}

/* Sections */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4rem, 10vh, 6.5rem) var(--pad);
}

.section__intro {
  max-width: 38rem;
  margin-bottom: clamp(2rem, 5vh, 3rem);
}

.section__intro h2,
.cta__panel h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.6vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.section__intro p,
.cta__panel > p:not(.cta__brand) {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

/* Solutions — typographic columns, not cards */
.solutions__list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.solution {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 1.25rem;
  row-gap: 0.35rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line);
}

.solution__index {
  grid-row: 1 / span 2;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
  padding-top: 0.35rem;
}

.solution h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}

.solution p {
  margin: 0;
  max-width: 40rem;
  color: var(--ink-muted);
  line-height: 1.65;
}

@media (min-width: 900px) {
  .solutions__list {
    grid-template-columns: repeat(3, 1fr);
    border-top: none;
    gap: 0;
  }

  .solution {
    display: block;
    padding: 0 1.75rem;
    border-bottom: none;
    border-right: 1px solid var(--line);
  }

  .solution:first-child {
    padding-left: 0;
  }

  .solution:last-child {
    border-right: none;
    padding-right: 0;
  }

  .solution__index {
    display: block;
    margin-bottom: 1.25rem;
  }

  .solution h3 {
    margin-bottom: 0.75rem;
  }
}

/* Approach */
.approach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.approach__list li {
  display: grid;
  gap: 0.35rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.approach__list strong {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.approach__list span {
  color: var(--ink-muted);
  max-width: 36rem;
  line-height: 1.6;
}

@media (min-width: 800px) {
  .approach__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

/* FAQ — interactive, so bordered containers are ok */
.faq__list {
  display: grid;
  gap: 0.75rem;
  max-width: 44rem;
}

.faq__item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 18, 24, 0.55);
  padding: 0 1.15rem;
  transition: border-color 160ms ease;
}

.faq__item[open] {
  border-color: rgba(79, 140, 255, 0.4);
  background: linear-gradient(180deg, var(--accent-soft), transparent 120%);
}

.faq__item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.015em;
}

.faq__item summary::-webkit-details-marker {
  display: none;
}

.faq__item summary::after {
  content: "+";
  float: right;
  color: var(--ink-faint);
  font-weight: 500;
}

.faq__item[open] summary::after {
  content: "–";
  color: var(--accent);
}

.faq__item p {
  margin: 0 0 1.15rem;
  color: var(--ink-muted);
  line-height: 1.65;
}

/* Closing CTA */
.cta__panel {
  text-align: center;
  padding: clamp(2.5rem, 7vh, 4rem) clamp(1.25rem, 4vw, 2rem);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 0.35rem);
  background:
    radial-gradient(80% 80% at 50% 0%, var(--glow), transparent 60%),
    rgba(14, 18, 24, 0.65);
}

.cta__brand {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--accent);
}

.cta__panel h2 {
  margin-inline: auto;
  max-width: 18ch;
}

.cta__panel > p:not(.cta__brand) {
  margin: 0 auto 1.75rem;
  max-width: 34rem;
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* Footer */
.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem var(--pad) 2rem;
  border-top: 1px solid var(--line);
}

.footer__top {
  display: grid;
  gap: 0.65rem;
  margin-bottom: 2rem;
}

.footer__brand {
  font-size: 1.25rem;
  width: fit-content;
}

.footer__top p {
  margin: 0;
  max-width: 28rem;
  color: var(--ink-muted);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 0.875rem;
}

.footer__links {
  display: flex;
  gap: 1.25rem;
}

.footer__links a {
  text-decoration: none;
  color: var(--ink-faint);
  transition: color 160ms ease;
}

.footer__links a:hover {
  color: var(--ink);
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 700ms var(--ease-out),
    transform 700ms var(--ease-out);
}

.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 90ms;
}

.reveal-delay-2 {
  transition-delay: 180ms;
}

.reveal-delay-3 {
  transition-delay: 270ms;
}

/* Motion */
@keyframes aurora-drift {
  from {
    transform: translate3d(-2%, 0, 0) scale(1);
  }
  to {
    transform: translate3d(3%, 2%, 0) scale(1.05);
  }
}

@keyframes grid-pulse {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 0.9;
  }
}

@keyframes meteor {
  0% {
    opacity: 0;
    transform: translate3d(0, 0, 0) rotate(25deg);
  }
  8% {
    opacity: 0.8;
  }
  28% {
    opacity: 0;
    transform: translate3d(180px, 320px, 0) rotate(25deg);
  }
  100% {
    opacity: 0;
  }
}

@keyframes beam {
  from {
    background-position: 200% 0;
  }
  to {
    background-position: -200% 0;
  }
}

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

  .atmosphere__aurora,
  .atmosphere__grid,
  .atmosphere__meteors span,
  .btn__beam {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__lines li {
    transition: none;
  }

  .btn:hover,
  .nav__cta:hover {
    transform: none;
  }
}