/* Sub-page layouts */

.page-hero {
  padding: 3.25rem 0 2rem;
  border-bottom: 1px solid var(--line);
}

.page-hero .brand-sm {
  margin: 0.85rem 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.page-hero .brand-sm em {
  font-style: normal;
  color: var(--neon);
}

.page-hero .lede {
  margin: 0;
  max-width: 40rem;
  color: var(--text-dim);
}

.page-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.page-toc a {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid var(--line);
  color: var(--text-dim);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.page-toc a:hover {
  color: var(--neon);
  border-color: rgba(61, 255, 168, 0.4);
  background: rgba(61, 255, 168, 0.06);
}

/* Module index */
.module-block {
  padding: 2.75rem 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 5rem;
}

.module-block:last-of-type { border-bottom: 0; }

.module-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.module-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  letter-spacing: -0.025em;
}

.module-tag {
  font-family: var(--font-lcd);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.cap-item {
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: var(--panel);
  transition: border-color 0.2s var(--ease);
}

.cap-item:hover {
  border-color: rgba(61, 255, 168, 0.35);
}

.cap-item h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: -0.015em;
}

.cap-item p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.45;
}

.cap-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.45rem 1.25rem;
}

.cap-list li {
  position: relative;
  padding-left: 0.9rem;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.cap-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--neon);
  opacity: 0.75;
}

/* Spec rows */
.spec-rows {
  display: grid;
  gap: 0.85rem;
}

.spec-row {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1.25rem;
  align-items: start;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: var(--panel);
}

.spec-row .spec-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  text-align: center;
}

.spec-row .spec-icon img {
  width: 3rem;
  height: 3rem;
  object-fit: contain;
}

.spec-row .spec-icon span {
  font-family: var(--font-lcd);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.spec-row h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.spec-row p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.spec-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.spec-meta span {
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 600;
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(61, 255, 168, 0.04);
}

/* Flow diagram */
.flow-diagram {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 1.5rem 1.25rem;
  margin: 1.5rem 0;
}

.flow-node {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 1rem 0.75rem;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(4, 17, 12, 0.6);
  min-width: 0;
}

.flow-node strong {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--neon);
}

.flow-node span {
  font-size: 0.72rem;
  color: var(--text-dim);
}

.flow-arrow {
  flex: 0 0 auto;
  align-self: center;
  width: 2rem;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon), transparent);
  position: relative;
}

.flow-arrow::after {
  content: "";
  position: absolute;
  right: -2px;
  top: 50%;
  transform: translateY(-50%);
  border: 4px solid transparent;
  border-left-color: var(--neon);
}

/* Live demo strip on IoT */
.iot-demo {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin: 1.5rem 0 0.5rem;
}

.iot-demo .digi-meter {
  width: 100%;
}

/* Callout */
.page-callout {
  margin: 2rem 0 0;
  padding: 1.5rem 1.35rem;
  text-align: center;
}

.page-callout p {
  margin: 0 0 1rem;
  color: var(--text-dim);
}

.page-callout .hero-cta {
  justify-content: center;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (max-width: 900px) {
  .cap-grid { grid-template-columns: 1fr 1fr; }
  .cap-list { grid-template-columns: 1fr; }
  .iot-demo { grid-template-columns: 1fr 1fr; }
  .flow-diagram { flex-wrap: wrap; }
  .flow-arrow { width: 1.25rem; }
}

@media (max-width: 640px) {
  .cap-grid { grid-template-columns: 1fr; }
  .spec-row {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .spec-row .spec-icon { flex-direction: row; justify-content: center; }
  .spec-meta { justify-content: center; }
  .iot-demo { grid-template-columns: 1fr; }
}