/* =============================================================
   DSolutions — Black Box ("Operating Model · v1")
   Lives on how.html. Click the box to reveal the 12 disciplines.
   ============================================================= */

.bbox-section {
  padding: 56px 0 72px;
  border-bottom: 1px solid var(--line);
}
.bbox-stage {
  background: var(--ink);
  border-radius: 24px;
  padding: 56px 32px 40px;
  position: relative;
  overflow: hidden;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  background-position: -1px -1px;
}
@media (max-width: 720px) { .bbox-stage { padding: 36px 16px 24px; border-radius: 18px; } }

.bbox-label {
  position: absolute;
  top: 22px; left: 28px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}
@media (max-width: 720px) { .bbox-label { top: 14px; left: 18px; } }

.bbox-machine {
  display: grid;
  grid-template-columns: 1fr auto 1.4fr auto 1fr;
  align-items: center;
  gap: 18px;
  max-width: 1040px;
  margin: 0 auto;
}
@media (max-width: 920px) {
  .bbox-machine {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* INPUT / OUTPUT PORTS */
.bbox-port {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.port-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 4px;
}
.bbox-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--paper);
  font-size: 14px;
  font-weight: 500;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.bbox-pill:hover { border-color: rgba(74,138,216,0.45); background: rgba(74,138,216,0.06); }
.bbox-pill .pico {
  width: 18px; height: 18px;
  color: var(--signal);
  flex-shrink: 0;
}
.bbox-pill .pico svg { width: 100%; height: 100%; stroke: currentColor; fill: none; }
.bbox-pill .ptxt { flex: 1; min-width: 0; }
.bbox-pill .pdot {
  width: 7px; height: 7px;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(74,138,216,0.18);
  flex-shrink: 0;
}
.bbox-pill .amount {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  color: #25D366;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

/* ARROW between port and core */
.bbox-arrow {
  display: flex;
  align-items: center;
  gap: 6px;
  position: relative;
  justify-content: center;
  height: 14px;
}
@media (max-width: 920px) { .bbox-arrow { transform: rotate(90deg); } }
.bbox-arrow .pulse {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: rgba(74,138,216,0.4);
  animation: bbox-pulse 1.6s ease-in-out infinite;
}
.bbox-arrow .p2 { animation-delay: 0.18s; }
.bbox-arrow .p3 { animation-delay: 0.36s; }
@keyframes bbox-pulse {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50%       { opacity: 1;    transform: scale(1.35); background: var(--signal); }
}

/* THE BOX CORE */
.bbox-core {
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  aspect-ratio: 5 / 4;
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  border: 1px solid rgba(74,138,216,0.32);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 24px;
  cursor: pointer;
  text-align: center;
  color: var(--paper);
  transition: transform var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
  box-shadow: 0 24px 60px -20px rgba(74,138,216,0.35), inset 0 0 0 1px rgba(255,255,255,0.04);
}
.bbox-core:hover {
  transform: translateY(-2px);
  border-color: var(--signal);
  box-shadow: 0 32px 80px -20px rgba(74,138,216,0.5), inset 0 0 0 1px rgba(255,255,255,0.06);
}
.bbox-core .core-mark {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(74,138,216,0.12);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--signal);
}
.bbox-core .core-mark svg { width: 18px; height: 18px; }
.bbox-core .core-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}
.bbox-core .core-title {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 26px;
  letter-spacing: -0.015em;
  color: var(--paper);
  line-height: 1;
}
.bbox-core .core-cta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--signal);
  text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 4px;
}
.bbox-core .open-arrow { transition: transform var(--t-fast); }
.bbox-core:hover .open-arrow { transform: translateX(3px); }

.bbox-caption {
  text-align: center;
  margin: 20px 0 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.5);
}
.bbox-caption .signal { color: var(--signal); }

/* OVERLAY — opens on click */
.bbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,27,45,0.78);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 60;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}
.bbox-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.bbox-internals {
  background: #0F1B2D;
  border: 1px solid rgba(74,138,216,0.32);
  border-radius: 22px;
  padding: 36px;
  max-width: 1080px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  color: var(--paper);
  position: relative;
  transform: translateY(20px);
  transition: transform var(--t-base);
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 32px 32px;
}
.bbox-overlay.is-open .bbox-internals { transform: none; }
@media (max-width: 720px) { .bbox-internals { padding: 24px 18px; border-radius: 16px; } }

.bbox-internals .bbox-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.04);
  color: var(--paper);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background var(--t-fast), border-color var(--t-fast);
}
.bbox-internals .bbox-close:hover { background: rgba(255,255,255,0.12); border-color: var(--paper); }

.bbox-int-head {
  text-align: center;
  margin-bottom: 28px;
  max-width: 720px;
  margin-left: auto; margin-right: auto;
}
.bbox-int-head h4 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: clamp(22px, 3vw, 32px);
  letter-spacing: -0.015em;
  margin: 0 0 10px;
  color: var(--paper);
}
.bbox-int-head .it-lede {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.55;
  color: rgba(255,255,255,0.7);
}

.bbox-int-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 22px;
}
@media (min-width: 640px) { .bbox-int-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 880px) { .bbox-int-grid { grid-template-columns: repeat(4, 1fr); } }
.bbox-int-cell {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: center;
  align-items: center;
  transition: background var(--t-fast), border-color var(--t-fast);
}
.bbox-int-cell:hover { background: rgba(74,138,216,0.06); border-color: rgba(74,138,216,0.3); }
.bbox-int-cell.highlight {
  background: rgba(74,138,216,0.10);
  border-color: rgba(74,138,216,0.45);
}
.bbox-int-cell .ic-icon {
  font-size: 16px;
  color: var(--signal);
  margin-bottom: 4px;
}
.bbox-int-cell .ic-name {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 14.5px;
  color: var(--paper);
  letter-spacing: -0.005em;
}
.bbox-int-cell .ic-desc {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  line-height: 1.45;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.02em;
}

.bbox-int-foot {
  text-align: center;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.bbox-int-foot .ifoot-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}