:root {
  --bg: #ffffff;
  --surface: #f7f9fc;
  --text: #202833;
  --muted: #687586;
  --border: #e0e5ec;
  --accent: #173B5B;
  --accent-hover: #1c5b92;
  --success: #26734d;

  --container-width: 1120px;
  --header-height: 76px;
  --radius: 14px;
  --shadow: 0 12px 36px rgba(32, 40, 51, 0.06);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 4px;
}

.logo-text {
    font-family: 'Montserrat', sans-serif;
    font-size: 40px;
    color: #173B5B;
    letter-spacing: -1px;
    margin: 0;
    line-height: 1;
}

.rotor {
    font-weight: 400; /* Normal */
}

.bear {
    font-weight: 700; /* Bold */
}

.container {
  width: min(var(--container-width), calc(100% - 48px));
  margin-inline: auto;
}

.section {
  padding: 100px 0;
}

/* Navigation */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
}

.navbar {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 9px;
  background: var(--accent);
  color: white;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -1px;
}

.brand-name,
.footer-brand {
  font-size: 20px;
  font-weight: 750;
  letter-spacing: -0.8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-link {
  position: relative;
  padding: 8px 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 550;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
}

.nav-link.active::after {
  position: absolute;
  right: 0;
  bottom: -2px;
  left: 0;
  height: 2px;
  background: var(--accent);
  content: "";
}

.nav-cta {
  padding: 9px 17px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 650;
  transition:
    border-color 0.2s ease,
    color 0.2s ease,
    background 0.2s ease;
}

.nav-cta:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--surface);
}

/* Shared typography */

.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 1.6px;
  line-height: 1.6;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  letter-spacing: -0.8px;
}

h1 {
  font-size: clamp(38px, 4.5vw, 58px);
  font-weight: 760;
}

h2 {
  font-size: clamp(30px, 3.2vw, 40px);
  font-weight: 730;
}

p {
  color: var(--muted);
}

/* Home hero */

.hero {
  position: relative;
  overflow: hidden;
  padding-top: 50px;
  padding-bottom: 110px;
  background:
    radial-gradient(
      ellipse at 85% 25%,
      rgba(37, 99, 235, 0.065),
      transparent 38%
    ),
    var(--bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 64px;
}

.hero-content .eyebrow {
  margin-bottom: 23px;
}

.hero h1 {
  max-width: 620px;
  margin-bottom: 23px;
}

.hero h1 span {
  display: block;
  color: var(--accent);
}

.hero-description {
  max-width: 520px;
  font-size: 16px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 11px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 700;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

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

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

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

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

.button-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 12px;
}

.status-dot {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--success);
}

/* Engineering diagram */

.hero-visual {
  position: relative;
  min-width: 0;
  overflow: hidden;
  padding: 20px;
  border: 1px solid #dce5f4;
  border-radius: 17px;
  background:
    linear-gradient(rgba(37, 99, 235, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.035) 1px, transparent 1px),
    #fbfcff;
  background-size: 24px 24px;
  box-shadow: var(--shadow);
}

.visual-topline,
.visual-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.visual-topline {
  font-size: 9px;
  font-weight: 750;
  letter-spacing: 0.8px;
}

.visual-indicator {
  color: var(--success);
  font-size: 9px;
}

.diagram {
  position: relative;
  width: min(100%, 360px);
  aspect-ratio: 1;
  margin: 10px auto;
}

.diagram-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  aspect-ratio: 1;
  border: 1px solid rgba(37, 99, 235, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.ring-outer {
  width: 84%;
  border-style: dashed;
}

.ring-middle {
  width: 62%;
  border-color: rgba(37, 99, 235, 0.5);
}

.ring-inner {
  width: 39%;
  border-width: 2px;
  border-color: var(--accent);
}

.diagram-center {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 20%;
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: white;
  transform: translate(-50%, -50%);
}

.center-core {
  width: 38%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 7px rgba(37, 99, 235, 0.1);
}

.diagram-cross {
  position: absolute;
  top: 50%;
  left: 50%;
  background: rgba(37, 99, 235, 0.22);
  transform: translate(-50%, -50%);
}

.horizontal {
  width: 100%;
  height: 1px;
}

.vertical {
  width: 1px;
  height: 100%;
}

.diagram-label {
  position: absolute;
  padding: 3px 7px;
  border: 1px solid #dce5f4;
  border-radius: 4px;
  background: #ffffff;
  color: var(--accent);
  font-size: 8px;
  font-weight: 750;
  letter-spacing: 0.7px;
}

.label-top {
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
}

.label-right {
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}

.label-bottom {
  bottom: 5%;
  left: 50%;
  transform: translateX(-50%);
}

.label-left {
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.diagram-point {
  position: absolute;
  width: 9px;
  height: 9px;
  border: 2px solid white;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
}

.point-one {
  top: 24%;
  left: 27%;
}

.point-two {
  top: 33%;
  right: 22%;
}

.point-three {
  bottom: 20%;
  left: 37%;
}

.visual-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.metric-label {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
}

.visual-footer strong {
  font-size: 11px;
  font-weight: 700;
}

.visual-footer-right {
  text-align: right;
}

/* Product section */

.product-section {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.section-heading {
  max-width: 670px;
  margin: 0 auto 43px;
  text-align: center;
}

.section-heading .eyebrow {
  margin-bottom: 14px;
}

.section-heading h2 {
  margin-bottom: 15px;
}

.section-heading p {
  font-size: 15px;
  line-height: 1.9;
}

.product-card {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.product-card-content {
  padding: 40px;
}

.product-icon {
  display: grid;
  width: 54px;
  height: 54px;
  margin-bottom: 23px;
  place-items: center;
  border: 1px solid #dbe6ff;
  border-radius: 12px;
  background: #eff4ff;
  color: var(--accent);
}

.product-tag {
  display: block;
  margin-bottom: 12px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 1.3px;
}

.product-card h3 {
  margin-bottom: 16px;
  font-size: 29px;
}

.product-card-content > p {
  font-size: 14px;
  line-height: 1.9;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 25px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 750;
}

.text-link span {
  transition: transform 0.2s ease;
}

.text-link:hover span {
  transform: translateX(4px);
}

.product-features {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0;
  padding: 26px 32px;
  border-left: 1px solid var(--border);
  background: #fbfcff;
}

.feature-row {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 14px;
  padding: 21px 0;
}

.feature-row + .feature-row {
  border-top: 1px solid var(--border);
}

.feature-number {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid #dce5f4;
  border-radius: 8px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 750;
}

.feature-row h4 {
  margin-bottom: 7px;
  font-size: 15px;
  letter-spacing: -0.2px;
}

.feature-row p {
  font-size: 12px;
  line-height: 1.8;
}

/* Technical capabilities */

.capabilities-section {
  background: #ffffff;
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.capability-card {
  padding: 33px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #ffffff;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.capability-card:hover {
  transform: translateY(-3px);
  border-color: #c5d6ff;
  box-shadow: var(--shadow);
}

.capability-index {
  margin-bottom: 21px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 1.2px;
}

.capability-card h3 {
  margin-bottom: 13px;
  font-size: 23px;
}

.capability-card > p {
  margin-bottom: 21px;
  font-size: 13px;
  line-height: 1.9;
}

.capability-card ul {
  display: grid;
  gap: 11px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  list-style: none;
}

.capability-card li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: 12px;
}

.capability-card li::before {
  position: absolute;
  top: 9px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
}

/* Contact section */

.contact-section {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.contact-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: 65px;
  padding: 45px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.contact-intro .eyebrow {
  margin-bottom: 15px;
}

.contact-intro h2 {
  margin-bottom: 17px;
  font-size: clamp(29px, 3vw, 36px);
}

.contact-intro p {
  font-size: 14px;
  line-height: 1.9;
}

.contact-details {
  display: grid;
  gap: 13px;
}

.contact-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 15px;
  padding: 19px;
  border: 1px solid var(--border);
  border-radius: 10px;
  transition:
    border-color 0.2s ease,
    background 0.2s ease;
}

.contact-item:hover {
  border-color: #c5d6ff;
  background: #fbfcff;
}

.contact-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 10px;
  background: #eff4ff;
  color: var(--accent);
}

.contact-label {
  display: block;
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 11px;
}

.contact-item strong {
  display: block;
  overflow-wrap: anywhere;
  font-size: 13px;
  font-weight: 700;
}

.contact-arrow {
  color: var(--accent);
  font-size: 18px;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  background: #ffffff;
}

.footer-content {
  display: flex;
  min-height: 90px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-brand {
  font-size: 17px;
}

.footer-content p,
.footer-content > span {
  font-size: 11px;
}

.footer-content > span {
  color: var(--muted);
  text-align: right;
}

/* Responsive layouts */

@media (max-width: 900px) {
  .section {
    padding: 78px 0;
  }

  .hero {
    padding-top: 72px;
    padding-bottom: 78px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 43px;
  }

  .hero-content {
    max-width: 680px;
  }

  .hero-visual {
    width: min(100%, 520px);
    margin-inline: auto;
  }

  .product-card {
    grid-template-columns: 1fr;
  }

  .product-features {
    padding-inline: 35px;
    border-top: 1px solid var(--border);
    border-left: none;
  }

  .contact-panel {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 34px;
  }
}

@media (max-width: 600px) {
  :root {
    --header-height: 66px;
  }

  .container {
    width: calc(100% - 36px);
  }

  .section {
    padding: 62px 0;
  }

  .navbar {
    gap: 12px;
  }

  .brand {
    gap: 8px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 19px;
  }

  .brand-name {
    font-size: 17px;
  }

  .nav-links {
    gap: 17px;
  }

  .nav-link {
    font-size: 12px;
  }

  .nav-cta {
    display: none;
  }

  .hero {
    padding-top: 56px;
    padding-bottom: 60px;
  }

  .hero-grid {
    gap: 34px;
  }

  .hero-content .eyebrow {
    margin-bottom: 17px;
    font-size: 9px;
    letter-spacing: 1.1px;
  }

  h1 {
    font-size: clamp(34px, 9vw, 45px);
  }

  .hero-description {
    font-size: 14px;
    line-height: 1.85;
  }

  .hero-actions {
    align-items: stretch;
  }

  .button {
    min-height: 46px;
    padding: 11px 13px;
    font-size: 12px;
  }

  .hero-note {
    font-size: 11px;
  }

  .hero-visual {
    padding: 15px;
  }

  .visual-topline {
    font-size: 8px;
  }

  .visual-indicator {
    font-size: 8px;
  }

  .diagram {
    width: 100%;
  }

  .visual-footer strong {
    font-size: 9px;
  }

  .metric-label {
    font-size: 8px;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  .section-heading h2 {
    font-size: 29px;
  }

  .section-heading p {
    font-size: 13px;
  }

  .product-card-content {
    padding: 25px;
  }

  .product-card h3 {
    font-size: 25px;
  }

  .product-card-content > p {
    font-size: 13px;
  }

  .product-features {
    padding: 16px 23px;
  }

  .feature-row {
    gap: 10px;
  }

  .feature-row h4 {
    font-size: 14px;
  }

  .capabilities-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .capability-card {
    padding: 25px;
  }

  .capability-card h3 {
    font-size: 21px;
  }

  .contact-panel {
    gap: 24px;
    padding: 24px 18px;
  }

  .contact-intro h2 {
    font-size: 29px;
  }

  .contact-item {
    grid-template-columns: 40px minmax(0, 1fr) 16px;
    gap: 11px;
    padding: 13px 11px;
  }

  .contact-icon {
    width: 40px;
    height: 40px;
  }

  .contact-item strong {
    font-size: 11px;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 5px;
    padding-top: 22px;
    padding-bottom: 22px;
  }

  .footer-content p,
  .footer-content > span {
    font-size: 10px;
    text-align: left;
  }
}

/* Respect reduced-motion accessibility preferences */

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