.home { background: var(--bg); }

.field {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
}

.no-field .field { display: none; }

.aura {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(45% 50% at 70% 40%, rgba(255, 59, 48, 0.12), transparent 70%),
    radial-gradient(35% 40% at 15% 85%, rgba(90, 110, 190, 0.1), transparent 70%);
  animation: aura 18s ease-in-out infinite alternate;
}

@keyframes aura {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-6%, 4%, 0) scale(1.08); }
  100% { transform: translate3d(4%, -3%, 0) scale(1.02); }
}

.home main,
.home .site-footer { position: relative; z-index: 1; }

.home .site-footer { background: var(--bg); }

/* Loader */

.loader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: var(--bg);
  animation: loader-out 0.9s var(--ease) 1.15s forwards;
}

.loader-inner { display: grid; gap: 1rem; justify-items: center; }

.loader-word {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
  overflow: hidden;
}

.loader-word span {
  display: inline-block;
  animation: loader-word 0.8s var(--ease) both;
}

.loader-word b { color: var(--red); font-weight: 500; }

.loader-bar { width: 180px; height: 1px; background: var(--line-2); overflow: hidden; }

.loader-bar i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--red), #ff8a5c);
  transform: scaleX(0);
  transform-origin: left;
  animation: loader-bar 1.05s var(--ease) 0.1s forwards;
}

@keyframes loader-word { from { transform: translateY(110%); } }
@keyframes loader-bar { to { transform: scaleX(1); } }
@keyframes loader-out { to { transform: translateY(-100%); visibility: hidden; } }

/* Chapters */

.chapter {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--header) + 3rem) 0 5rem;
}

.chapter .copy { position: relative; width: min(36rem, 100%); }
.chapter.is-right .copy { margin-left: auto; }

.chapter.is-center .copy {
  width: min(56rem, 100%);
  margin-inline: auto;
  text-align: center;
}

.chapter.is-center .copy::before {
  content: "";
  position: absolute;
  inset: -20% -10%;
  z-index: -1;
  background: radial-gradient(closest-side, rgba(6, 6, 6, 0.82), transparent);
}

.chapter.is-center .hero-actions { justify-content: center; }
.chapter.is-center .body { margin-inline: auto; }

.chapter-num {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 0 0 1.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

.chapter.is-center .chapter-num { justify-content: center; }
.chapter-num b { color: var(--red); font-weight: 500; }
.chapter-num::after { content: ""; width: 3rem; height: 1px; background: var(--line-2); }
.chapter.is-center .chapter-num::after { display: none; }

.chapter h2 { font-size: clamp(2.6rem, 5.2vw, 4.7rem); line-height: 1; letter-spacing: -0.045em; }

.chapter .body {
  max-width: 33rem;
  margin-top: 1.4rem;
  font-size: 1.1rem;
  color: var(--body);
}

/* Hero */

.hero-title {
  font-size: clamp(3.4rem, 8.6vw, 8.2rem);
  line-height: 0.92;
  letter-spacing: -0.058em;
}

.grad .w > span {
  background: linear-gradient(95deg, #ffffff 0%, #ff8a7f 45%, #ff3b30 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.chapter-hero .copy { width: min(46rem, 100%); }

.js .chapter-hero .pill,
.js .chapter-hero .body,
.js .chapter-hero .hero-actions {
  opacity: 0;
  transform: translateY(16px);
  animation: rise 1s var(--ease) forwards;
}

.js .chapter-hero .pill { animation-delay: 1.2s; }
.js .chapter-hero .body { animation-delay: 1.7s; }
.js .chapter-hero .hero-actions { animation-delay: 1.85s; }

.cue {
  position: absolute;
  left: 50%;
  bottom: 2rem;
  display: grid;
  justify-items: center;
  gap: 0.7rem;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
}

.cue i {
  width: 1px;
  height: 52px;
  background: linear-gradient(var(--red), transparent);
  transform-origin: top;
  animation: cue 2.2s var(--ease) infinite;
}

@keyframes cue {
  0% { transform: scaleY(0); opacity: 1; }
  55% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

/* AI chapter */

.tests {
  margin: 2.2rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.tests li {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  overflow: hidden;
}

.tests li::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--red), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.2s var(--ease);
  transition-delay: calc(var(--k, 0) * 90ms + 0.2s);
}

.tests.is-in li::before { transform: scaleX(1); }

.tests li span {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

.tests li span b { color: #ff7a72; font-weight: 500; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.chips li {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(10, 10, 11, 0.5);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--body);
}

/* Platform chapter */

.lines { display: grid; gap: 10px; margin-top: 2.2rem; }

.line,
.specs > div {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(10, 10, 11, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color 0.3s var(--ease), transform 0.4s var(--ease);
}

.line::before,
.specs > div::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 59, 48, 0.14), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

.line:hover::before,
.specs > div:hover::before { opacity: 1; }

.line {
  display: grid;
  grid-template-columns: 5.5rem 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.25rem 1.35rem;
  color: var(--ink);
  text-decoration: none;
}

.line:hover { border-color: var(--line-2); transform: translateX(8px); }
.line strong { font-size: 1.7rem; font-weight: 500; letter-spacing: -0.04em; }
.line p { color: var(--muted); font-size: 0.95rem; }

.line em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
  white-space: nowrap;
}

.lines.is-compact { gap: 8px; }
.lines.is-compact .line { grid-template-columns: 36px 10rem 1fr auto; padding: 0.75rem 1.1rem 0.75rem 0.8rem; }
.line-logo { width: 36px; height: 36px; border-radius: 10px; }
.chapter .p-id { margin-bottom: 1.2rem; font-size: 0.98rem; }
.chapter .p-id .p-logo { width: 48px; height: 48px; border-radius: 14px; }
.lines.is-compact .line strong { font-size: 1.15rem; letter-spacing: -0.02em; }
.lines.is-compact .line p { font-size: 0.88rem; }

.aside-link { margin-top: 1.4rem; color: var(--muted); font-size: 0.95rem; }
.aside-link a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line-2); }
.aside-link a:hover { border-color: var(--ink); }

/* Marquee */

.marquee {
  position: relative;
  z-index: 1;
  overflow: hidden;
  padding: 2.6rem 0;
  border-block: 1px solid var(--line);
  background: rgba(6, 6, 6, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.marquee-skew { will-change: transform; }

.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 34s linear infinite;
}

.marquee span {
  padding-right: 3.2rem;
  font-size: clamp(3rem, 8vw, 7.4rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.055em;
  white-space: nowrap;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.3);
}

.marquee span.fill { color: var(--ink); -webkit-text-stroke: 0; }
.marquee span.hot { color: var(--red); -webkit-text-stroke: 0; }

@keyframes marquee { to { transform: translateX(-50%); } }

/* Robotics chapter */

.specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 2.2rem;
}

.specs > div { padding: 1.15rem 1.25rem 1.25rem; }
.specs > div:hover { border-color: var(--line-2); transform: translateY(-4px); }
.specs small { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.14em; color: var(--faint); }
.specs b { display: block; margin: 0.9rem 0 0.25rem; color: var(--ink); font-weight: 500; }
.specs span { color: var(--muted); font-size: 0.9rem; }

/* Rail */

.rail {
  position: fixed;
  top: 50%;
  right: 1.6rem;
  z-index: 5;
  display: grid;
  gap: 0.95rem;
  transform: translateY(-50%);
}

.rail a {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.7rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: transparent;
  transition: color 0.3s var(--ease);
}

.rail a::after {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--line-2);
  transition: width 0.4s var(--ease), background 0.4s var(--ease);
}

.rail a:hover { color: var(--muted); }
.rail a.is-active { color: var(--body); }
.rail a.is-active::after { width: 36px; background: var(--red); }

/* Responsive */

@media (max-width: 1180px) {
  .rail { display: none; }
}

@media (max-width: 900px) {
  .field { opacity: 0.45; }
  .chapter { align-items: flex-end; min-height: 100svh; }
  .chapter.is-right .copy { margin-left: 0; }
  .chapter .copy { padding: 1.5rem 0; }
  .chapter .copy::before {
    content: "";
    position: absolute;
    inset: -2rem -1.5rem;
    z-index: -1;
    background: linear-gradient(to top, rgba(6, 6, 6, 0.9), rgba(6, 6, 6, 0.5) 70%, transparent);
  }
  .line { grid-template-columns: 1fr auto; }
  .line p { grid-column: 1 / -1; }
  .lines.is-compact .line { grid-template-columns: 36px 1fr auto; }
  .lines.is-compact .line p { grid-column: 2 / -1; }
  .specs { grid-template-columns: 1fr; }
  .cue { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .loader { display: none; }
  .aura, .marquee-track, .cue i { animation: none; }
  .js .chapter-hero .pill,
  .js .chapter-hero .body,
  .js .chapter-hero .hero-actions { opacity: 1; transform: none; animation: none; }
  .tests li::before { transition: none; }
}