/* ENGINEERING BLUEPRINT — blue drafting grid, sharp analytical presentation. */
:root {
  --accent-on-dark: #87d6ff;
  --accent-text: #145b88;
  --accent: #1976b4;
  --accent-hover: #115a8d;
  --accent-ink: #ffffff;
  --ink: #123951;
  --text: #3e596b;
  --muted: #627c8b;
  --surface: #ffffff;
  --soft: #eff6fa;
  --concrete: #e2f1f6;
  --dark: #103951;
  --dark-deep: #092a40;
  --border: #d2e4ed;
  --radius: 6px;
  --radius-lg: 10px;
}
.home-hero .hero-mask, .page-hero .hero-mask { background: linear-gradient(90deg,rgba(5,33,56,.98),rgba(8,43,66,.91) 44%,rgba(11,55,84,.61)); }
.hero-gridlines { background-image: linear-gradient(90deg, rgba(183,225,255,.09) 1px, transparent 1px),linear-gradient(rgba(183,225,255,.09) 1px,transparent 1px);background-size:34px 34px;opacity:1; }
.section-concrete { background-image: linear-gradient(#b3d4e34d 1px,transparent 1px),linear-gradient(90deg,#b3d4e34d 1px,transparent 1px);background-size:32px 32px; }
.section-dark { background-image: linear-gradient(#ffffff0d 1px,transparent 1px),linear-gradient(90deg,#ffffff0d 1px,transparent 1px);background-size:34px 34px; }
.hero-interface { border-radius: 3px; background: rgba(5,31,51,.84); box-shadow: 9px 9px 0 rgba(13,88,135,.32); }
.brand-mark,.theme-swatch,.theme-current-swatch { border-radius: 2px; }
.grade-card,.article-card,.service-card-light { box-shadow: 4px 4px 0 #d8e9f1; }
.feature-tile-icon, .service-card .service-icon, .button { border-radius: 4px; }
.hero-process, .interface-topline, .hero-decor { font-family: ui-monospace,Consolas,monospace; }