/* Homepage "In-House Disciplines" — capability stack builder widget.
   Toggle a discipline off and see who steps off the project and how
   the sample-output diagram changes. Tokens come from global.css. */

.stack-widget {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  box-shadow: var(--shadow-sm);
  margin-top: var(--sp-10);
}

.stack-chips {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-bottom: var(--sp-8);
}
.stack-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 18px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-dark);
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.stack-chip:hover { border-color: var(--navy-light); }
.stack-chip__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-dark);
  flex-shrink: 0;
  transition: background var(--t-fast);
}
.stack-chip.is-active {
  background: var(--green-dim);
  border-color: var(--green);
  color: var(--navy);
}
.stack-chip.is-active .stack-chip__dot { background: var(--green); }

.stack-panels {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--sp-10);
  align-items: start;
}

.stack-team__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.stack-team__role {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  padding: 11px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--navy);
  transition: opacity var(--t-base) var(--ease), background var(--t-base), color var(--t-base);
}
.stack-team__role.is-dim { opacity: 0.30; }

.stack-output__stage {
  position: relative;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-4);
}
.stack-output__stage svg {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity var(--t-base) var(--ease);
}
.stack-output__empty {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--sp-6);
}
.stack-output__stage.is-empty .stack-output__empty { display: flex; }
.stack-output__empty p {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-subtle);
  max-width: 34ch;
}
.stack-output__caption {
  margin-top: var(--sp-4);
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
  min-height: 2.6em;
}

/* SVG diagram */
.stack-block rect {
  fill: var(--bg-white);
  stroke: var(--border-dark);
  stroke-width: 1.5;
  transition: opacity var(--t-base) var(--ease);
}
.stack-block[data-block="ml"] rect,
.stack-block[data-block="llm"] rect { stroke: var(--green); }
.stack-block[data-block="web"] rect,
.stack-block[data-block="app"] rect { stroke: var(--amber); }
.stack-block__abbr {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  text-anchor: middle;
  fill: var(--navy);
}
.stack-block[data-block="ml"] .stack-block__abbr,
.stack-block[data-block="llm"] .stack-block__abbr { fill: var(--green); }
.stack-block[data-block="web"] .stack-block__abbr,
.stack-block[data-block="app"] .stack-block__abbr { fill: var(--amber); }
.stack-block__label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-anchor: middle;
  fill: var(--text-subtle);
}
.stack-block.is-off { opacity: 0.20; }

.stack-line {
  stroke: var(--border-dark);
  stroke-width: 2;
  transition: opacity var(--t-base) var(--ease);
}
.stack-line[data-line="ml"],
.stack-line[data-line="llm"] { stroke: var(--green); }
.stack-line[data-line="web"],
.stack-line[data-line="app"] { stroke: var(--amber); }
.stack-line.is-off { opacity: 0; }

#stack-hub {
  fill: var(--navy-bg);
  stroke: var(--green);
  stroke-width: 2;
  transition: stroke var(--t-base), stroke-dasharray var(--t-base);
  transform-box: fill-box;
  transform-origin: center;
}
#stack-hub.is-pulsing {
  animation: stack-hub-pulse 0.6s ease-out;
}
@keyframes stack-hub-pulse {
  0%   { transform: scale(1); filter: drop-shadow(0 0 0 rgba(63,207,142,0)); }
  40%  { transform: scale(1.22); filter: drop-shadow(0 0 12px rgba(63,207,142,0.85)); }
  100% { transform: scale(1); filter: drop-shadow(0 0 0 rgba(63,207,142,0)); }
}
@media (prefers-reduced-motion: reduce) {
  #stack-hub.is-pulsing { animation: none; }
}
.stack-hub__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-anchor: middle;
  fill: var(--navy);
  transition: fill var(--t-base);
}
#stack-svg.is-empty { opacity: 0.45; }
#stack-svg.is-empty #stack-hub {
  stroke: var(--border-dark);
  stroke-dasharray: 4 3;
}
#stack-svg.is-empty .stack-hub__label { fill: var(--text-subtle); }

@media (max-width: 860px) {
  .stack-widget { padding: var(--sp-5); }
  .stack-panels { grid-template-columns: 1fr; gap: var(--sp-8); }
}