.card,
.section-shell {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.96), rgba(15, 23, 42, 0.92));
  box-shadow: var(--shadow-lg);
}

.card {
  padding: var(--space-4);
}

.card-title,
.section-heading,
.hero-title,
.eyebrow,
.card-copy,
.section-copy {
  margin: 0;
}

.eyebrow {
  color: var(--accent-primary);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-title,
.section-heading {
  color: var(--text-primary);
  line-height: 1.05;
  letter-spacing: -0.03em;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.hero-title {
  width: 100%;
  max-width: none;
  font-size: clamp(2.75rem, 6vw, 5rem);
}

.section-heading {
  max-width: 18ch;
  font-size: clamp(2rem, 3vw, 3rem);
}

.section-header {
  max-width: 52rem;
  margin-bottom: var(--space-4);
}

.section-header-tight {
  margin-bottom: var(--space-3);
}

.hero-summary,
.section-copy,
.card-copy {
  color: var(--text-secondary);
  font-size: 1rem;
}

.hero-summary {
  max-width: 42rem;
  width: min(100%, 42rem);
  margin-inline: auto;
  font-size: 1.125rem;
}

.card-title {
  font-size: 1.25rem;
  line-height: 1.2;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.muted {
  color: color-mix(in srgb, var(--text-secondary) 88%, white 12%);
}

.hero-copy-content {
  align-content: start;
}

.hero-shell {
  gap: var(--space-5);
}

.hero-intro {
  max-width: 100%;
}

.hero-shell-centered {
  align-items: center;
}

.hero-intro-centered {
  max-width: 62rem;
  margin-inline: auto;
  text-align: center;
}

.hero-actions-shell {
  display: flex;
  justify-content: center;
}

.hero-actions {
  justify-content: center;
  flex-wrap: nowrap;
  gap: var(--space-1);
}

.hero-focus-card {
  max-width: 42rem;
  margin-inline: auto;
  padding: var(--space-3);
}

.hero-focus-panel {
  gap: var(--space-2);
}

.hero-focus-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.signal-grid-security {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: var(--space-2);
}

.hero-panel {
  min-height: 100%;
  justify-content: center;
}

.signal-grid {
  display: grid;
  gap: var(--space-2);
}

.signal-grid-hero {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.signal-grid-about {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.signal-grid-tight {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.signal-card,
.signal-pill {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
}

.signal-card {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.signal-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0 var(--space-3);
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.2;
  text-align: center;
}

.placeholder {
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(148, 163, 184, 0.12), rgba(148, 163, 184, 0.28), rgba(148, 163, 184, 0.12));
}

.placeholder-title {
  width: min(100%, 18rem);
  height: 3rem;
  border-radius: var(--radius-md);
}

.placeholder-title.small {
  width: min(100%, 12rem);
  height: 2rem;
}

.placeholder-line {
  width: 100%;
  height: 1rem;
}

.placeholder-line.short {
  width: 72%;
}

.placeholder-line.shorter {
  width: 56%;
}

.placeholder-graphic {
  min-height: 18rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(79, 70, 229, 0.22), rgba(255, 255, 255, 0.06)),
    linear-gradient(90deg, rgba(148, 163, 184, 0.18), rgba(148, 163, 184, 0.1));
}

.hero-diagram {
  min-height: 24rem;
}

.hero-copy,
.system-card-copy,
.capability-card {
  min-height: 100%;
}

.capability-card-security {
  grid-column: 1 / -1;
}

.button-placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  max-height: 1rem;
  min-height: 2.5rem;
  padding-inline: var(--space-2);
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, rgba(79, 70, 229, 0.16), rgba(79, 70, 229, 0.34), rgba(79, 70, 229, 0.16));
  color: var(--text-primary);
  font-size: 0.875rem;
  text-align: center;
}

.button-placeholder.secondary {
  background: linear-gradient(90deg, rgba(148, 163, 184, 0.12), rgba(148, 163, 184, 0.24), rgba(148, 163, 184, 0.12));
}

.button-placeholder.tertiary {
  background: linear-gradient(90deg, rgba(34, 197, 94, 0.12), rgba(34, 197, 94, 0.24), rgba(34, 197, 94, 0.12));
}

.system-card-graphic {
  min-height: 16rem;
  display: grid;
  align-content: center;
}

.capability-card {
  display: grid;
  gap: var(--space-3);
}

.about-card {
  gap: var(--space-4);
}

.navbar-shell,
.footer-shell {
  width: min(calc(100% - 2rem), var(--container-width));
  margin-inline: auto;
  padding: var(--space-3) 0;
}

.navbar-shell {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-inline: var(--space-3);
  background: rgba(7, 11, 18, 0.72);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
}

.navbar-brand,
.navbar-links,
.footer-grid {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.navbar-brand,
.navbar-link,
.footer-grid .placeholder,
.section-shell .placeholder {
  flex: 0 0 auto;
}

.navbar-brand {
  gap: var(--space-2);
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.875rem;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.32), rgba(148, 163, 184, 0.12));
  font-size: 0.875rem;
}

.navbar-name {
  font-size: 1rem;
}

.navbar-links {
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.navbar-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0 var(--space-2);
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.navbar-link:hover,
.navbar-link:focus-visible,
.navbar-link[aria-current="page"] {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  outline: none;
}

.navbar-link-cta {
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  background: rgba(79, 70, 229, 0.16);
}

.footer-shell {
  padding-bottom: var(--space-5);
}

.footer-grid {
  justify-content: space-between;
  flex-wrap: wrap;
}

.footer-grid .placeholder {
  width: clamp(8rem, 22vw, 15rem);
  height: 1.25rem;
}

@media (min-width: 1400px) {
  .container {
    width: min(calc(100% - 3rem), 1400px);
  }

  .hero-intro-centered,
  .section-header,
  .cta-shell {
    max-width: 70rem;
  }

  .hero-focus-card,
  .system-card,
  .step-card {
    width: min(78rem, 100%);
  }
}

@media (max-width: 960px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .navbar-shell {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .navbar-brand {
    width: 100%;
  }

  .navbar-links {
    width: 100%;
    justify-content: flex-start;
  }

  .hero-diagram,
  .system-card-graphic {
    min-height: 14rem;
  }

  .hero-focus-card {
    max-width: 100%;
  }

  .signal-grid-about {
    grid-template-columns: 1fr;
  }

  .signal-grid-security {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .navbar-shell {
    padding: var(--space-2);
  }

  .navbar-brand {
    gap: var(--space-1);
  }

  .navbar-mark {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 0.8rem;
  }

  .navbar-name {
    font-size: 0.9rem;
  }

  .navbar-links {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .navbar-links::-webkit-scrollbar {
    display: none;
  }

  .navbar-link {
    min-height: 2.25rem;
    padding: 0 var(--space-1);
    font-size: 0.82rem;
  }

  .hero-actions {
    flex-wrap: wrap;
  }

  .hero-title {
    font-size: clamp(2.25rem, 11vw, 3.5rem);
  }

  .section-heading {
    max-width: none;
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }

  .signal-grid-hero,
  .signal-grid-tight {
    grid-template-columns: 1fr;
  }

  .button-placeholder {
    width: 100%;
    max-width: 14rem;
  }
}