/* ─── Engineering Page ────────────────────────────────────────────── */
body {
  background: var(--obsidian-slate);
  min-height: 100vh;
}

#chat-widget { display: none !important; }

/* ── Nav ──────────────────────────────────────────────── */
.eng-nav {
  padding: .75rem 0;
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
}
.eng-back-link {
  color: var(--sandy-peach);
  font-weight: 600;
  transition: opacity .2s;
}
.eng-back-link:hover { opacity: .75; }
.eng-nav span { color: var(--cornflower-blue-dim); }

/* ── Page header ─────────────────────────────────────── */
.eng-header {
  max-width: 900px;
  margin-top: 2rem;
}
.eng-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--cornflower-blue);
  margin-bottom: .75rem;
}
.eng-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--parchment);
  margin-bottom: .75rem;
}
.eng-title-accent { color: var(--sandy-peach); }
.eng-subtitle {
  font-size: 1rem;
  color: var(--cornflower-blue-dim);
  line-height: 1.7;
  max-width: 640px;
}

/* ── Layout: cards + chat ────────────────────────────── */
.eng-body {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 2rem;
  margin-top: 2.5rem;
  padding-bottom: 3rem;
  align-items: start;
}

/* ── Case study cards ────────────────────────────────── */
.eng-cases {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.eng-case {
  position: relative;
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 10px;
  background: rgba(27,37,44,.6);
  padding: 1.5rem 1.75rem;
  cursor: pointer;
  transition: all .25s ease;
}
.eng-case:hover {
  border-color: rgba(159,184,217,.2);
  background: rgba(27,37,44,.8);
}
.eng-case-active {
  border-color: var(--sandy-peach) !important;
  background: rgba(27,37,44,.9) !important;
  box-shadow: 0 0 30px rgba(244,215,177,.06);
}

/* Case header row */
.eng-case-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: .75rem;
}
.eng-case-num {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  color: var(--deep-sand);
  letter-spacing: .04em;
  flex-shrink: 0;
}
.eng-case-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--parchment);
  line-height: 1.35;
}

/* Before → Decision → After row */
.eng-case-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: .5rem;
  align-items: start;
}
.eng-case-col {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}
.eng-case-col-label {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cornflower-blue);
  margin-bottom: .15rem;
}
.eng-case-col p {
  font-size: .82rem;
  color: var(--cornflower-blue-dim);
  line-height: 1.55;
  margin: 0;
}
.eng-case-arrow {
  color: rgba(255,255,255,.15);
  font-size: 1.2rem;
  padding-top: 1rem;
  user-select: none;
}

/* Impact badge */
.eng-case-impact {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-top: .85rem;
  padding: .35rem .75rem;
  border-radius: 99px;
  background: rgba(244,215,177,.06);
  border: 1px solid rgba(244,215,177,.12);
  font-size: .72rem;
  font-weight: 600;
  color: var(--sandy-peach);
}
.eng-case-impact-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sandy-peach);
}

/* CTA hint on card */
.eng-case-cta {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: .68rem;
  font-weight: 600;
  color: var(--cornflower-blue-dim);
  opacity: 0;
  transition: opacity .2s;
  letter-spacing: .04em;
}
.eng-case:hover .eng-case-cta { opacity: .6; }
.eng-case-active .eng-case-cta { opacity: 1; color: var(--sandy-peach); }

/* ── Chat column ─────────────────────────────────────── */
.eng-chat-col {
  position: sticky;
  top: 1rem;
}
.eng-chat-col .ai-chat-embed {
  height: calc(100vh - 3rem);
  display: flex;
  flex-direction: column;
}
.eng-chat-col .ai-chat-log {
  flex: 1;
  min-height: 0;
  max-height: none;
}

#eng-chat-input {
  flex: 1;
  background: transparent;
  border: none;
  padding: .5rem .4rem;
  font-size: .85rem;
  color: var(--parchment);
  font-family: inherit;
  outline: none;
}
#eng-chat-input::placeholder { color: #5a7a96; }
#eng-chat-send {
  background: var(--deep-sand);
  border: none;
  border-radius: 8px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: .85rem;
  cursor: pointer;
  transition: background .2s;
  flex-shrink: 0;
}
#eng-chat-send:hover { background: #a87d63; }

/* ── Mobile ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .eng-body {
    grid-template-columns: 1fr;
    padding-bottom: 2rem;
  }
  .eng-chat-col {
    position: static;
  }
  .eng-chat-col .ai-chat-embed {
    height: 50vh;
  }
  .eng-case-flow {
    grid-template-columns: 1fr;
    gap: .75rem;
  }
  .eng-case-arrow { display: none; }
}