:root {
  --bg: #070a0f;
  --bg-soft: #0d131b;
  --surface: rgba(15, 22, 31, 0.76);
  --surface-strong: rgba(19, 27, 38, 0.94);
  --text: #eef2f4;
  --muted: #a7b0ba;
  --subtle: #737f8e;
  --line: rgba(255, 255, 255, 0.1);
  --line-soft: rgba(255, 255, 255, 0.065);
  --accent: #d8ad5b;
  --accent-soft: rgba(216, 173, 91, 0.16);
  --accent-faint: rgba(216, 173, 91, 0.07);
  --signal: #82b7c9;
  --signal-soft: rgba(130, 183, 201, 0.14);
  --radius-xl: 34px;
  --radius-lg: 26px;
  --radius-md: 18px;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 14% 2%, rgba(216, 173, 91, 0.1), transparent 24rem),
    radial-gradient(circle at 88% 28%, rgba(76, 111, 132, 0.16), transparent 32rem),
    linear-gradient(145deg, #06080d 0%, #0c121a 52%, #06080d 100%);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

body,
a,
button {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2 {
  margin-top: 0;
}

p {
  color: var(--muted);
  line-height: 1.68;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 30;
  transform: translateY(-180%);
  padding: 0.7rem 0.9rem;
  border-radius: 999px;
  background: var(--accent);
  color: #111;
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 10;
  display: flex;
  width: min(1180px, calc(100% - 40px));
  align-items: center;
  justify-content: space-between;
  padding: 26px 0;
  transform: translateX(-50%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  font-size: 0.96rem;
  font-weight: 760;
  letter-spacing: 0.01em;
}

.brand-signal {
  position: relative;
  display: inline-block;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(216, 173, 91, 0.44);
  border-radius: 999px;
  background: rgba(216, 173, 91, 0.06);
}

.brand-signal::before,
.brand-signal::after {
  content: "";
  position: absolute;
  border-radius: 999px;
}

.brand-signal::before {
  inset: 7px;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(216, 173, 91, 0.35);
}

.brand-signal::after {
  inset: -6px;
  border: 1px solid rgba(216, 173, 91, 0.14);
}

.intro-scene {
  display: grid;
  min-height: 100svh;
  place-items: center;
  padding: 120px 20px 72px;
}

.intro-inner {
  width: min(940px, 100%);
  text-align: center;
}

.eyebrow {
  margin-bottom: 20px;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1 {
  margin-bottom: 28px;
  font-size: clamp(4.4rem, 12vw, 10.5rem);
  font-weight: 760;
  line-height: 0.88;
  letter-spacing: -0.08em;
}

.intro-question {
  width: min(760px, 100%);
  margin: 0 auto;
}

.question-label {
  margin-bottom: 10px;
  color: var(--text);
  font-size: clamp(1.25rem, 2.4vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.035em;
}

.intro-question p:last-child {
  margin-bottom: 0;
  font-size: clamp(1.05rem, 1.55vw, 1.22rem);
}

.scroll-cue {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: 54px;
  color: var(--subtle);
  font-size: 0.86rem;
}

.scroll-line {
  position: relative;
  display: block;
  width: 1px;
  height: 52px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.12);
}

.scroll-line::after {
  content: "";
  position: absolute;
  top: -18px;
  left: 0;
  width: 1px;
  height: 18px;
  background: var(--accent);
  animation: scrollCue 1.8s ease-in-out infinite;
}

.story-section {
  min-height: 180svh;
  padding: 0 20px;
}

.story-stage {
  position: sticky;
  top: 0;
  display: grid;
  width: min(1180px, 100%);
  min-height: 100svh;
  margin: 0 auto;
  grid-template-columns: minmax(0, 0.76fr) minmax(560px, 1.24fr);
  gap: 54px;
  align-items: center;
  padding: 112px 0 72px;
}

.story-copy {
  max-width: 500px;
}

.story-copy h2 {
  margin-bottom: 20px;
  font-size: clamp(2rem, 4vw, 3.8rem);
  font-weight: 740;
  line-height: 1.04;
  letter-spacing: -0.058em;
}

.story-copy p:last-child {
  margin-bottom: 0;
}

.process-visual {
  position: relative;
  display: grid;
  min-height: 540px;
  grid-template-columns: 1fr 0.72fr 1fr;
  grid-template-areas:
    "hmi lane control"
    "hmi lane machine";
  align-items: center;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 50% 48%, rgba(130, 183, 201, 0.1), transparent 14rem),
    linear-gradient(180deg, rgba(18, 26, 36, 0.84), rgba(10, 15, 22, 0.9));
  box-shadow: var(--shadow);
  overflow: hidden;
  padding: 34px;
}

.process-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at center, black, transparent 78%);
}

.visual-card,
.command-lane {
  position: relative;
  z-index: 1;
}

.visual-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(8, 12, 18, 0.78);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.045);
  padding: 20px;
}

.hmi-card {
  grid-area: hmi;
}

.control-card {
  grid-area: control;
  align-self: end;
}

.machine-card {
  grid-area: machine;
  align-self: start;
}

.card-kicker {
  display: block;
  margin-bottom: 14px;
  color: var(--subtle);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.visual-card strong {
  display: block;
  margin-top: 18px;
  color: var(--text);
  font-size: 0.96rem;
}

.hmi-screen {
  display: grid;
  gap: 10px;
  padding: 15px;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(25, 35, 47, 0.92), rgba(11, 16, 23, 0.96));
}

.hmi-topbar,
.hmi-row,
.hmi-button {
  border-radius: 999px;
}

.hmi-topbar {
  height: 9px;
  width: 50%;
  background: rgba(130, 183, 201, 0.35);
}

.hmi-row {
  height: 10px;
  background: rgba(255, 255, 255, 0.13);
}

.hmi-row.active {
  width: 78%;
  background: rgba(216, 173, 91, 0.3);
}

.hmi-button {
  margin-top: 8px;
  padding: 10px 12px;
  border: 1px solid rgba(216, 173, 91, 0.44);
  background: var(--accent-faint);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 760;
  text-align: center;
}

.control-stack {
  display: grid;
  gap: 8px;
}

.control-stack span {
  display: block;
  padding: 9px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 11px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.84rem;
}

.machine-body {
  position: relative;
  height: 130px;
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  background:
    linear-gradient(90deg, transparent 48%, rgba(255,255,255,0.06) 49%, transparent 51%),
    linear-gradient(180deg, rgba(28, 37, 48, 0.95), rgba(12, 17, 24, 0.96));
}

.machine-light {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 8px var(--accent-soft);
  animation: machineBlink 2.6s ease-in-out infinite;
}

.machine-slot {
  position: absolute;
  left: 20px;
  right: 20px;
  top: 54px;
  height: 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.machine-base {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 18px;
  height: 24px;
  border-radius: 10px;
  background: rgba(130, 183, 201, 0.12);
}

.command-lane {
  grid-area: lane;
  display: grid;
  min-height: 340px;
  place-items: center;
}

.lane-line {
  position: absolute;
  left: 50%;
  top: 18%;
  bottom: 18%;
  width: 2px;
  background: linear-gradient(180deg, rgba(255,255,255,0.1), rgba(216,173,91,0.78), rgba(255,255,255,0.1));
  transform: translateX(-50%);
}

.command-pulse {
  position: absolute;
  left: calc(50% - 6px);
  top: 18%;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 8px var(--accent-soft), 0 0 30px rgba(216, 173, 91, 0.42);
  animation: commandTravel 3.8s linear infinite;
}

.command-label {
  position: relative;
  z-index: 1;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(8, 12, 18, 0.82);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.next-step {
  display: grid;
  min-height: 54svh;
  place-items: center;
  padding: 60px 20px 90px;
  text-align: center;
}

.next-step p {
  width: min(720px, 100%);
  margin: 0;
  color: var(--text);
  font-size: clamp(1.3rem, 2.5vw, 2.45rem);
  font-weight: 720;
  line-height: 1.18;
  letter-spacing: -0.04em;
}

::selection {
  background: var(--accent-soft);
  color: var(--text);
}

@keyframes scrollCue {
  to {
    transform: translateY(72px);
  }
}

@keyframes commandTravel {
  0% {
    top: 18%;
    opacity: 0;
  }
  12% {
    opacity: 1;
  }
  88% {
    opacity: 1;
  }
  100% {
    top: calc(82% - 12px);
    opacity: 0;
  }
}

@keyframes machineBlink {
  0%, 42%, 100% {
    opacity: 0.45;
  }
  50%, 72% {
    opacity: 1;
  }
}

@media (max-width: 980px) {
  .story-stage {
    position: relative;
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 94px 0 72px;
  }

  .story-section {
    min-height: auto;
  }

  .story-copy {
    max-width: 760px;
  }

  .process-visual {
    grid-template-columns: 1fr;
    grid-template-areas:
      "hmi"
      "lane"
      "control"
      "machine";
    min-height: auto;
  }

  .command-lane {
    min-height: 110px;
  }

  .lane-line {
    left: 8%;
    right: 8%;
    top: 50%;
    bottom: auto;
    width: auto;
    height: 2px;
    transform: translateY(-50%);
  }

  .command-pulse {
    left: 8%;
    top: calc(50% - 6px);
    animation: commandTravelHorizontal 3.8s linear infinite;
  }

  .command-label {
    writing-mode: initial;
    transform: none;
  }
}

@keyframes commandTravelHorizontal {
  0% {
    left: 8%;
    opacity: 0;
  }
  12% {
    opacity: 1;
  }
  88% {
    opacity: 1;
  }
  100% {
    left: calc(92% - 12px);
    opacity: 0;
  }
}

@media (max-width: 680px) {
  .site-header {
    width: min(100% - 28px, 1180px);
    padding-top: 20px;
  }

  .intro-scene {
    padding-inline: 14px;
  }

  h1 {
    font-size: clamp(3.8rem, 22vw, 6.5rem);
  }

  .story-section {
    padding-inline: 14px;
  }

  .process-visual {
    padding: 20px;
    border-radius: 24px;
  }

  .visual-card {
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}