html {
  scroll-behavior: smooth;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 12px;
  z-index: 100;
  background: var(--teal);
  color: #06201f;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 12px;
}

.landing-page {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
}

/* ---------- Buttons ---------- */

.btn-primary {
  display: inline-block;
  text-decoration: none;
  text-align: center;
}

.btn-small {
  padding: 10px 20px;
  font-size: 14px;
  border-radius: 10px;
}

.btn-large {
  padding: 16px 34px;
  font-size: 17px;
}

.btn-ghost {
  display: inline-block;
  padding: 16px 34px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-light);
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.btn-ghost:hover {
  border-color: var(--teal-soft);
  background: rgba(255, 255, 255, 0.1);
}

/* ---------- Nav ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 32px;
  background: rgba(7, 13, 13, 0.55);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
}

.nav-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-icon {
  height: 28px;
  width: auto;
}

.nav-logo {
  height: 24px;
  width: auto;
  margin-left: -13px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  flex: 1;
  justify-content: flex-end;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  opacity: 0.85;
  transition: opacity 0.15s ease, color 0.15s ease;
}

.nav-links a:hover {
  opacity: 1;
  color: var(--teal);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-login {
  color: var(--text-light);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.nav-login:hover {
  color: var(--teal);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
    padding: 20px 24px 28px;
    background: rgba(7, 13, 13, 0.92);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    display: none;
  }

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

  .nav-links {
    flex-direction: column;
    gap: 16px;
  }

  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .nav-actions .btn-primary {
    text-align: center;
  }
}

/* ---------- Section shell ---------- */

.section {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 96px 24px;
  scroll-margin-top: 80px;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.eyebrow {
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 12px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.2;
  margin: 0 0 16px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.6;
  margin: 0;
}

.text-teal {
  color: var(--teal);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 48px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 100px 24px 96px;
}

.hero-content {
  flex: 1 1 480px;
  max-width: 560px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.1;
  margin: 0 0 20px;
}

.hero-subtext {
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1.65;
  margin: 0 0 32px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  flex: 1 1 340px;
  display: flex;
  justify-content: center;
}

.hero-image {
  width: 100%;
  max-width: 340px;
  height: auto;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 18px 34px rgba(26, 214, 214, 0.4));
  animation: image-float 6s ease-in-out infinite;
}

.about-image {
  max-width: 340px;
}

@keyframes image-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-image,
  .device-image {
    animation: none;
  }
}

.home-page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.home-page main#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.construction-hero {
  justify-content: center;
  text-align: center;
}

.construction-hero .hero-content {
  max-width: 640px;
}

.construction-hero .hero-subtext {
  margin-left: auto;
  margin-right: auto;
}

.construction-hero .status-badge {
  margin-bottom: 20px;
}

.construction-hero .hero-actions {
  justify-content: center;
}

/* ---------- Feature grid ---------- */

.feature-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 24px;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--teal-soft);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--teal), #0e8fa0);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.55;
}

/* ---------- About showcase ---------- */

.about-showcase {
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.about-visual {
  flex: 1 1 300px;
  display: flex;
  justify-content: center;
}

.about-feature-grid {
  flex: 2 1 480px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (max-width: 560px) {
  .about-feature-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Status badges ---------- */

.status-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.status-progress {
  background: rgba(26, 214, 214, 0.16);
  color: var(--teal);
  border: 1px solid rgba(26, 214, 214, 0.4);
}

.status-development {
  background: rgba(60, 130, 230, 0.18);
  color: #8dc1ff;
  border: 1px solid rgba(60, 130, 230, 0.45);
}

.status-soon {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  border: 1px solid var(--glass-border);
}

.status-completed {
  background: rgba(60, 210, 130, 0.16);
  color: #7be6a8;
  border: 1px solid rgba(60, 210, 130, 0.4);
}

/* ---------- Device section ---------- */

.device-gallery {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.device-figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: 220px;
  margin: 0;
}

.device-image {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 18px 34px rgba(26, 214, 214, 0.35));
  animation: image-float 7s ease-in-out infinite;
}

.device-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.device-feature {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 22px 20px;
  text-align: center;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
}

.device-feature h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.device-feature p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.55;
}

@media (max-width: 800px) {
  .device-feature-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Roadmap ---------- */

.roadmap-track {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 720px;
  position: relative;
}

.roadmap-track::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--teal), rgba(255, 255, 255, 0.08));
}

.roadmap-item {
  position: relative;
  padding-left: 52px;
  margin-bottom: 36px;
}

.roadmap-item:last-child {
  margin-bottom: 0;
}

.roadmap-marker {
  position: absolute;
  left: 9px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--teal);
  box-shadow: 0 0 0 4px rgba(26, 214, 214, 0.15);
}

.roadmap-content h3 {
  margin: 4px 0 6px;
  font-size: 18px;
}

.roadmap-content p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.55;
}

/* ---------- CTA band ---------- */

.cta-band {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 24px 120px;
}

.cta-band h2 {
  font-size: clamp(26px, 4vw, 34px);
  margin: 0 0 12px;
}

.cta-band p {
  color: var(--text-muted);
  margin: 0 0 28px;
}

.cta-band .hero-actions {
  justify-content: center;
}

/* ---------- Footer ---------- */

.site-footer {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 24px;
  border-top: 1px solid var(--glass-border);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-logo {
  width: 140px;
  height: auto;
}

.footer-brand p {
  margin: 0;
  color: var(--text-muted);
  font-size: 13px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--text-light);
}

.footer-copyright {
  width: 100%;
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 8px;
}

/* ---------- Scroll reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}