:root {
  color-scheme: dark;
  --bg: #101820;
  --panel: rgba(17, 26, 32, 0.88);
  --line: rgba(154, 178, 190, 0.28);
  --text: #eef5f3;
  --muted: #9fb1ba;
  --soft: #c7d2d6;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(16, 24, 32, 0.9), rgba(16, 24, 32, 0.45)),
    linear-gradient(0deg, rgba(16, 24, 32, 0.92), rgba(16, 24, 32, 0.22)),
    var(--feature-image) center / cover fixed,
    var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}
a { color: inherit; }
.feature-shell {
  min-height: 100vh;
  padding: 92px clamp(16px, 4vw, 54px) 34px;
}
.feature-topbar {
  position: fixed;
  z-index: 4;
  top: 0;
  left: 0;
  right: 0;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px clamp(18px, 4vw, 44px);
  background: rgba(16, 24, 32, 0.78);
  border-bottom: 1px solid rgba(154, 178, 190, 0.16);
  backdrop-filter: blur(18px);
}
.brand-mark {
  font-size: 19px;
  font-weight: 900;
  text-decoration: none;
}
.feature-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--soft);
  font-weight: 850;
}
.feature-nav a {
  text-decoration: none;
}
.feature-hero {
  max-width: 760px;
  padding: 28px 0 22px;
}
.status-kicker {
  margin: 0 0 8px;
  color: #9be0d6;
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}
.feature-hero h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(48px, 8vw, 104px);
  line-height: 0.92;
}
.feature-hero p {
  max-width: 56ch;
  margin: 16px 0 0;
  color: var(--soft);
  font-size: 18px;
  line-height: 1.45;
  font-weight: 750;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 20px;
}
.primary-link-button,
.secondary-link-button {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  border-radius: 6px;
  border: 1px solid var(--line);
  padding: 9px 12px;
  font-weight: 900;
  text-decoration: none;
}
.primary-link-button {
  border-color: var(--accent);
  background: var(--accent);
  color: #07120f;
}
.secondary-link-button {
  background: rgba(29, 42, 49, 0.86);
}
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.metric,
.data-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  backdrop-filter: blur(18px);
}
.metric {
  min-height: 118px;
  padding: 14px;
}
.metric span,
.panel-heading span,
.stack-item span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
}
.metric strong {
  display: block;
  margin-top: 12px;
  color: #fff;
  font-size: 34px;
  line-height: 1;
  font-weight: 900;
}
.metric p,
.stack-item p {
  margin: 7px 0 0;
  color: var(--soft);
  font-size: 13px;
  line-height: 1.35;
  font-weight: 750;
}
.feature-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.data-panel {
  overflow: hidden;
}
.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
}
.panel-heading h2 {
  margin: 0;
  font-size: 20px;
}
.stack-list {
  display: grid;
  gap: 1px;
}
.stack-item {
  min-height: 100px;
  padding: 13px 14px;
  background: rgba(17, 26, 32, 0.58);
}
.stack-item strong {
  display: block;
  margin-top: 6px;
  color: #fff;
  font-size: 18px;
  line-height: 1.15;
}

@media (max-width: 900px) {
  .feature-topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }
  .feature-shell {
    padding-top: 16px;
  }
  .metric-grid,
  .feature-panels {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .feature-hero h1 {
    font-size: 46px;
  }
  .feature-hero p {
    font-size: 16px;
  }
}