/* =========================================================
   POOL.MGULER — Engineering interior page (G12)
   Page-specific styles; rides on ../assets/css/main.css tokens.
   ========================================================= */

.eng-body { background: var(--ink); color: var(--paper); }

/* current nav item */
.header-nav a.is-current { color: #fff; }
.header-nav a.is-current::after {
  content: "";
  display: block;
  height: 1px;
  margin-top: 4px;
  background: var(--blue);
  opacity: 0.8;
}

/* ---- HERO ---- */
.eng-hero {
  background: var(--ink);
  padding: clamp(150px, 20vh, 220px) 0 clamp(70px, 11vw, 150px);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  position: relative;
  overflow: hidden;
}
.eng-hero::after {
  /* faint blueprint glow, top-right */
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 120%;
  background: radial-gradient(circle at 70% 30%, rgba(123,199,243,0.10), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.eng-hero-inner {
  position: relative;
  z-index: 1;
  padding: 0 var(--gutter);
  max-width: 980px;
}
.eng-breadcrumb {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 34px;
}
.eng-breadcrumb a { color: rgba(255,255,255,0.6); text-decoration: none; transition: color .3s ease; }
.eng-breadcrumb a:hover { color: #fff; }
.eng-bc-sep { margin: 0 10px; opacity: 0.4; }

.eng-hero-title {
  font-family: "Montserrat Alternates", sans-serif;
  font-weight: 200;
  font-size: var(--h-display);
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--paper);
  margin: 26px 0 0;
}
.eng-hero-lead {
  margin-top: 30px;
  max-width: 620px;
  font-size: 18px;
  line-height: 1.65;
  color: rgba(255,255,255,0.62);
}
.eng-hero-scroll {
  display: inline-block;
  margin-top: 44px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  text-decoration: none;
  transition: opacity .3s ease;
}
.eng-hero-scroll:hover { opacity: 0.7; }

/* shared dark block heads */
.eng-block-head {
  padding: 0 var(--gutter);
  max-width: 720px;
  margin-bottom: clamp(48px, 6vw, 84px);
}

/* ---- THE SEVEN SYSTEMS ---- */
.eng-systems { background: var(--ink); padding: var(--section-y) 0; }
.eng-system-list {
  padding: 0 var(--gutter);
  max-width: 1100px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.eng-system {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: clamp(24px, 5vw, 72px);
  align-items: start;
  padding: clamp(36px, 5vw, 60px) 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.eng-system-id { display: flex; flex-direction: column; gap: 10px; }
.eng-system-no {
  font-family: "Montserrat Alternates", sans-serif;
  font-weight: 200;
  font-size: clamp(44px, 5vw, 76px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(123,199,243,0.32);
}
.eng-system-name {
  font-family: "Montserrat Alternates", sans-serif;
  font-weight: 300;
  font-size: var(--h-3);
  letter-spacing: -0.01em;
  color: var(--paper);
}
.eng-system-desc {
  font-size: 17px;
  line-height: 1.72;
  color: rgba(255,255,255,0.62);
  max-width: 620px;
}
.eng-system-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 56px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,0.07);
}
.eng-system-meta div { display: flex; flex-direction: column; gap: 6px; }
.eng-system-meta dt {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
}
.eng-system-meta dd {
  margin: 0;
  font-family: "Montserrat Alternates", sans-serif;
  font-weight: 300;
  font-size: 16px;
  color: var(--paper);
}

/* ---- STANDARDS ---- */
.eng-standards {
  background: #0B0E12;
  padding: var(--section-y) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.eng-stat-grid {
  padding: 0 var(--gutter);
  max-width: 1100px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
}
.eng-stat {
  background: #0B0E12;
  padding: clamp(28px, 4vw, 44px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.eng-stat-fig {
  font-family: "Montserrat Alternates", sans-serif;
  font-weight: 200;
  font-size: clamp(26px, 3vw, 40px);
  letter-spacing: -0.02em;
  color: var(--paper);
}
.eng-stat-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.42);
}

/* ---- NEXT / RELATED ---- */
.eng-next {
  background: var(--ink);
  padding: clamp(70px, 10vw, 130px) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.eng-next-inner {
  padding: 0 var(--gutter);
  max-width: 980px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.eng-next-lead {
  font-family: "Montserrat Alternates", sans-serif;
  font-weight: 200;
  font-size: clamp(22px, 2.6vw, 34px);
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 480px;
}
.eng-next-links { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .eng-stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .eng-system {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .eng-system-id { flex-direction: row; align-items: baseline; gap: 16px; }
  .eng-system-no { font-size: 40px; }
  .eng-hero-lead { font-size: 16px; }
  .eng-next-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .eng-stat-grid { grid-template-columns: 1fr; }
}