:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #526173;
  --soft: #eef4f8;
  --paper: #f8fbfd;
  --panel: #ffffff;
  --line: #d9e4ec;
  --blue: #1769e0;
  --blue-dark: #0d3f8f;
  --blue-soft: #e8f1ff;
  --gray-blue: #23364c;
  --shadow: 0 22px 60px rgba(17, 24, 39, 0.11);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, #ffffff 0%, var(--paper) 460px, #ffffff 100%);
  text-rendering: optimizeLegibility;
}

img,
video,
canvas {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 16px clamp(18px, 5vw, 64px);
  border-bottom: 1px solid rgba(217, 228, 236, 0.8);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #405067;
  font-size: 14px;
  font-weight: 700;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--blue);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #ffffff;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 16px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(420px, 1.06fr);
  gap: clamp(36px, 6vw, 84px);
  width: min(1200px, calc(100% - 36px));
  min-height: calc(100vh - 72px);
  margin: 0 auto;
  padding: clamp(64px, 9vw, 112px) 0 clamp(54px, 8vw, 88px);
  align-items: center;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 16px;
  color: var(--ink);
  font-size: clamp(62px, 10vw, 124px);
  line-height: 0.9;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(31px, 4vw, 54px);
  line-height: 1.04;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
  line-height: 1.22;
}

p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.68;
}

.hero-subtitle {
  max-width: 760px;
  margin-bottom: 18px;
  color: var(--gray-blue);
  font-size: clamp(25px, 3.4vw, 42px);
  font-weight: 760;
  line-height: 1.08;
}

.hero-description {
  max-width: 610px;
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.button.primary {
  color: #ffffff;
  background: var(--blue);
}

.button.primary:hover {
  background: var(--blue-dark);
}

.button.secondary {
  color: var(--blue-dark);
  border-color: #b8cbe1;
  background: #ffffff;
}

.hero-visual {
  display: grid;
  gap: 14px;
}

.visual-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.visual-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(23, 105, 224, 0.14), transparent 40%);
}

.visual-frame video {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #101927;
}

.visual-note {
  display: grid;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
}

.visual-note strong {
  color: var(--ink);
}

.visual-note span {
  color: var(--muted);
  line-height: 1.55;
}

.section {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(72px, 10vw, 116px) 0;
}

.section-split,
.audience,
.cta {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(34px, 7vw, 84px);
  align-items: start;
}

.copy-block p {
  font-size: 19px;
}

.problem {
  border-top: 1px solid var(--line);
}

.solution {
  width: 100%;
  max-width: none;
  padding-left: max(18px, calc((100vw - 1120px) / 2));
  padding-right: max(18px, calc((100vw - 1120px) / 2));
  background: var(--soft);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 38px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  min-height: 310px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 1px 0 rgba(17, 24, 39, 0.04);
}

.feature-number {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 54px;
  border-radius: 50%;
  color: var(--blue-dark);
  background: var(--blue-soft);
  font-size: 13px;
  font-weight: 900;
}

.audience {
  align-items: center;
  width: 100%;
  max-width: none;
  padding-left: max(18px, calc((100vw - 1120px) / 2));
  padding-right: max(18px, calc((100vw - 1120px) / 2));
  background: #101927;
  color: #ffffff;
}

.audience h2 {
  color: #ffffff;
}

.audience .section-label {
  color: #8fb9ff;
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.audience-list li {
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius);
  color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.05);
  font-weight: 720;
}

.initial-system {
  display: grid;
  grid-template-columns: minmax(320px, 0.75fr) minmax(0, 1fr);
  gap: clamp(34px, 7vw, 76px);
  align-items: center;
}

.system-viewer {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 28% 18%, rgba(23, 105, 224, 0.18), transparent 30%),
    linear-gradient(180deg, #f7fbff 0%, #eaf2f9 100%);
  box-shadow: var(--shadow);
}

.system-viewer canvas {
  width: 100%;
  height: 100%;
  min-height: 520px;
  cursor: grab;
}

.system-viewer canvas:active {
  cursor: grabbing;
}

.viewer-status {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  padding: 11px 13px;
  border: 1px solid rgba(184, 203, 225, 0.8);
  border-radius: 8px;
  color: #405067;
  background: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  font-weight: 700;
  backdrop-filter: blur(12px);
}

.viewer-status.is-ready {
  color: var(--blue-dark);
}

.viewer-status.is-error {
  color: #9f1d1d;
}

.viewer-controls {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
}

.viewer-controls button {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid rgba(184, 203, 225, 0.85);
  border-radius: 999px;
  color: var(--blue-dark);
  background: rgba(255, 255, 255, 0.86);
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  backdrop-filter: blur(12px);
}

.mission {
  padding-top: 0;
}

.mission-panel {
  max-width: 940px;
  padding: clamp(30px, 6vw, 58px);
  border: 1px solid #bdd0e5;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(23, 105, 224, 0.1), transparent 45%),
    #ffffff;
  box-shadow: var(--shadow);
}

.mission-panel p {
  max-width: 780px;
  font-size: 20px;
}

.cta {
  align-items: center;
  padding-top: 0;
}

.cta p {
  max-width: 650px;
}

.cta-actions {
  justify-content: flex-end;
  margin-top: 0;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(18px, 5vw, 64px);
  border-top: 1px solid var(--line);
  background: #ffffff;
}

.site-footer p {
  margin: 0;
  font-size: 14px;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 72px;
    left: 18px;
    right: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 14px;
  }

  .hero,
  .section-split,
  .audience,
  .initial-system,
  .cta {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: auto;
  }

  .feature-number {
    margin-bottom: 28px;
  }

  .system-viewer,
  .system-viewer canvas {
    min-height: 440px;
  }

  .cta-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .hero,
  .section {
    width: min(100% - 28px, 1120px);
  }

  h1 {
    font-size: 62px;
  }

  .hero-actions,
  .cta-actions,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .audience-list {
    grid-template-columns: 1fr;
  }

  .system-viewer,
  .system-viewer canvas {
    min-height: 360px;
  }

  .viewer-controls {
    left: 12px;
    right: 12px;
    justify-content: space-between;
  }

  .viewer-controls button {
    flex: 1;
    padding: 0 8px;
  }
}