/* =============================================================================
   SciPHR Docs, diagram.css  (tier stack + animated pipeline)
   ============================================================================= */

/* ── Tier stack ──────────────────────────────────────────────────────────── */
.tierstack { display: flex; flex-direction: column; gap: 14px; }
.tier {
  position: relative;
  border: 1px solid var(--d-gray-darker); border-radius: 4px;
  background: rgba(255,255,255,0.015);
  transition: border-color var(--d-norm) var(--d-ease), background var(--d-norm) var(--d-ease);
}
.tier.is-open { border-color: var(--d-white); background: rgba(255,255,255,0.035); }
.tier::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--d-gray-darker); transition: background var(--d-norm) var(--d-ease);
}
.tier.is-open::before { background: var(--d-accent); }

.tier__head {
  width: 100%; text-align: left; cursor: pointer; background: transparent; border: none;
  font-family: var(--d-mono); color: var(--d-white);
  display: flex; align-items: center; gap: 18px; padding: 20px 22px;
}
.tier__num {
  font-size: 11px; letter-spacing: 0.2em; color: var(--d-accent);
  font-weight: 600; flex: none; width: 44px;
}
.tier__titles { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.tier__name { font-size: 15px; font-weight: 600; letter-spacing: 0.02em; }
.tier__sub { font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--d-gray-dark); }
.tier__chips { margin-left: auto; display: flex; gap: 7px; flex-wrap: wrap; justify-content: flex-end; }
.tier__chip {
  font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--d-gray-light);
  border: 1px solid var(--d-gray-darker); border-radius: 3px; padding: 4px 8px; white-space: nowrap;
}
.tier__tw { flex: none; color: var(--d-gray-dark); transition: transform var(--d-norm) var(--d-ease); margin-left: 6px; }
.tier.is-open .tier__tw { transform: rotate(90deg); color: var(--d-accent); }

.tier__panel {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows var(--d-norm) var(--d-ease);
}
.tier.is-open .tier__panel { grid-template-rows: 1fr; }
.tier__panelin { overflow: hidden; }
.tier__body { padding: 4px 22px 22px 84px; }
.tier__body p { margin: 0 0 14px; font-size: 13px; line-height: 1.62; color: var(--d-gray-light); }
.tier__body p:last-child { margin-bottom: 0; }
.tier__flow {
  margin-top: 14px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--d-gray-dark);
}
.tier__flow .ar { color: var(--d-accent); }

@media (max-width: 720px) {
  .tier__chips { display: none; }
  .tier__body { padding-left: 22px; }
}

/* ── Pipeline animation ──────────────────────────────────────────────────── */
.pipe {
  border: 1px solid var(--d-gray-dark); border-radius: 4px; background: var(--d-black);
  padding: 0; overflow: hidden;
}
.pipe__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--d-gray-darker);
}
.pipe__lane { font-size: 11px; letter-spacing: 0.32em; text-transform: uppercase; color: var(--d-gray-light); }
.pipe__toggle {
  background: transparent; border: none; cursor: pointer; font-family: var(--d-mono);
  font-size: 10px; letter-spacing: 0.26em; text-transform: uppercase; color: var(--d-gray-dark);
  transition: color var(--d-fast) var(--d-ease);
}
.pipe__toggle:hover { color: var(--d-accent); }

.pipe__track {
  display: flex; align-items: center; padding: 30px 22px 22px;
  overflow-x: auto; scrollbar-width: none;
}
.pipe__track::-webkit-scrollbar { display: none; }

.pipe__node {
  flex: none; min-width: 104px; padding: 14px 12px; text-align: center;
  border: 1px solid var(--d-gray-darker); border-radius: 4px; background: rgba(255,255,255,0.02);
  display: flex; flex-direction: column; gap: 5px;
  transition: all var(--d-norm) var(--d-ease);
}
.pipe__node.is-on { border-color: var(--d-white); background: rgba(255,255,255,0.06); }
.pipe__node.is-active {
  border-color: var(--d-accent);
  box-shadow: 0 0 0 1px var(--d-accent), 0 0 18px 0 rgba(255,184,0,0.28);
}
.pipe__nlabel { font-size: 12px; font-weight: 600; color: var(--d-white); letter-spacing: 0.02em; }
.pipe__node.is-active .pipe__nlabel { color: var(--d-accent); }
.pipe__nsub { font-size: 9px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--d-gray-dark); }

.pipe__conn { flex: 1 1 22px; min-width: 22px; height: 2px; background: var(--d-gray-darker); position: relative; margin: 0 2px; }
.pipe__fill { position: absolute; inset: 0; width: 0; background: var(--d-accent); transition: width 0.55s linear; }
.pipe__conn.is-on .pipe__fill { width: 100%; }

.pipe__result {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 0 22px 8px; text-align: center; opacity: 0.35; transition: opacity var(--d-norm) var(--d-ease);
}
.pipe__result.is-on { opacity: 1; }
.pipe__rarrow { color: var(--d-gray-dark); font-size: 13px; }
.pipe__result.is-on .pipe__rarrow { color: var(--d-accent); }
.pipe__rlabel {
  font-size: 12px; font-weight: 600; letter-spacing: 0.24em; text-transform: uppercase; color: var(--d-white);
  border: 1px solid var(--d-gray-dark); border-radius: 4px; padding: 8px 16px;
}
.pipe__result.is-on .pipe__rlabel { border-color: var(--d-white); }
.pipe__rsub { font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--d-gray-dark); }

.pipe__caption {
  border-top: 1px solid var(--d-gray-darker); padding: 12px 16px; min-height: 42px;
  display: flex; align-items: center; gap: 10px;
  font-size: 12px; color: var(--d-gray-light); line-height: 1.4;
}
.pipe__cpfx { color: var(--d-gray-dark); }
.pipe__ctext { transition: opacity var(--d-fast) var(--d-ease); }

@media (max-width: 720px) {
  .pipe__node { min-width: 92px; }
}