.hero {
  position: relative;
  min-height: 100vh;
  padding: calc(var(--sp-16) + 2rem) 0 var(--sp-12);
  overflow: hidden;
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr minmax(280px, 35vw) 180px;
  gap: var(--sp-6);
  align-items: center;
}

.hero__eyebrow {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: var(--fs-mono-xs);
  color: var(--param-cyan);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding-left: 1.4rem;
  position: relative;
  margin-bottom: var(--sp-3);
  opacity: 0;
  animation: heroFade 800ms ease 300ms forwards;
}
.hero__eyebrow::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 1rem;
  height: 1px;
  background: var(--param-cyan);
}
.hero__corner-a {
  position: absolute;
  top: -1rem;
  right: 0;
  font-family: var(--ff-display);
  font-size: 4rem;
  color: var(--graphite);
  font-weight: 500;
  line-height: 1;
}

.hero__col-marks {
  position: absolute;
  left: -1.5rem;
  top: 5rem;
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
  font-family: var(--ff-mono);
  font-size: var(--fs-mono-xs);
  color: var(--graphite);
}

/* Main content */
.hero__content {
  max-width: 38rem;
}

.hero__title {
  font-family: var(--ff-display);
  font-weight: 600;
  font-size: clamp(2.4rem, 1.6rem + 3.2vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--bone);
  margin-bottom: var(--sp-3);
  max-width: 18ch;
}
.hero__title-word {
  display: block;
  opacity: 0;
  transform: translateY(40px);
  animation: heroLineUp 800ms cubic-bezier(0.65, 0, 0.35, 1) forwards;
}
.hero__title-word--1 { animation-delay: 400ms; }
.hero__title-word--2 { animation-delay: 500ms; }
.hero__title-accent {
  color: var(--param-cyan);
  display: inline-block;
  animation: cyanPulse 2.4s ease-in-out 1500ms infinite;
}

.hero__body {
  font-family: var(--ff-ui);
  font-weight: 400;
  font-size: var(--fs-lg);
  color: var(--bone);
  max-width: 32ch;
  margin-bottom: var(--sp-6);
  opacity: 0;
  animation: heroFade 800ms ease 700ms forwards;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  opacity: 0;
  animation: heroFade 800ms ease 1200ms forwards;
}

/* Spiral */
.hero__spiral-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero__spiral {
  width: clamp(280px, 35vw, 460px);
  aspect-ratio: 1;
  animation: spiralSpin 60s linear 3s infinite;
}
.hero__spiral-path {
  stroke-dasharray: 800;
  stroke-dashoffset: 800;
  animation: drawSpiral 2.4s cubic-bezier(0.65, 0, 0.35, 1) 700ms forwards;
}

/* Right param column */
.hero__params {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  font-family: var(--ff-mono);
  font-size: var(--fs-mono-xs);
  color: var(--ash);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-top: var(--sp-3);
  opacity: 0;
  animation: heroFade 800ms ease 900ms forwards;
}
.hero__params-title {
  color: var(--graphite);
  font-size: var(--fs-mono-xs);
  letter-spacing: 0.15em;
}
.hero__params-divider {
  height: 1px;
  background: var(--hairline);
  margin: var(--sp-1) 0;
}
.hero__params-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.hero__params-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.hero__params-item::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--param-cyan);
  flex-shrink: 0;
}
.hero__params-output {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--bone);
  letter-spacing: 0.1em;
}
.hero__params-output-arrow {
  display: inline-block;
  color: var(--param-cyan);
  animation: arrowPulse 2s ease-in-out infinite;
}

/* Footer of hero */
.hero__footer {
  position: absolute;
  bottom: var(--sp-4);
  left: var(--sp-4);
  right: var(--sp-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--ff-mono);
  font-size: var(--fs-mono-xs);
  color: var(--graphite);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0;
  animation: heroFade 800ms ease 1400ms forwards;
}
.hero__footer-rating { color: var(--param-cyan); }

.hero__cursor {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--param-cyan);
  margin-left: 0.4rem;
  vertical-align: middle;
  animation: cursorBlink 1s steps(2) infinite;
}

@keyframes heroLineUp {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes heroFade {
  to { opacity: 1; }
}
@keyframes drawSpiral {
  to { stroke-dashoffset: 0; }
}
@keyframes spiralSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes cyanPulse {
  0%, 100% { text-shadow: 0 0 0 transparent; }
  50% { text-shadow: 0 0 24px rgba(111, 227, 210, 0.6); }
}
@keyframes arrowPulse {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(4px); }
}
@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Tablet */
@media (max-width: 1100px) {
  .hero__inner { grid-template-columns: 1fr minmax(220px, 30vw); }
  .hero__params { display: none; }
}

/* Mobile */
@media (max-width: 720px) {
  .hero {
    padding-top: calc(var(--sp-12) + 2rem);
    min-height: auto;
  }
  .hero__inner { grid-template-columns: 1fr; gap: var(--sp-4); }
  .hero__corner-a { display: none; }
  .hero__col-marks { display: none; }
  .hero__spiral-wrap { order: 2; margin-top: var(--sp-4); }
  .hero__spiral { width: 70vw; max-width: 360px; }
  .hero__footer { position: relative; flex-direction: column; gap: var(--sp-2); align-items: flex-start; margin-top: var(--sp-8); bottom: auto; left: auto; right: auto; }
}