/* ITOS platform architecture — vector HTML diagram (crisp at any zoom) */
.arch-diagram {
  --arch-primary: #00377a;
  --arch-cyan: #06b6d4;
  --arch-surface: #f1f3ff;
  --arch-border: #c3c6d4;
  --arch-text: #151b2a;
  --arch-muted: #424752;
  font-family: "Space Grotesk", system-ui, sans-serif;
  color: var(--arch-text);
  padding: 1.25rem 1rem 1.5rem;
  min-width: 320px;
}

@media (min-width: 768px) {
  .arch-diagram {
    padding: 1.5rem 1.75rem 2rem;
  }
}

.arch-diagram__title {
  text-align: center;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--arch-primary);
  margin: 0 0 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--arch-cyan);
}

@media (min-width: 768px) {
  .arch-diagram__title {
    font-size: 0.8rem;
    margin-bottom: 1.5rem;
  }
}

.arch-layer {
  margin-bottom: 0.65rem;
}

.arch-layer__label {
  display: block;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--arch-cyan);
  text-align: center;
  margin-bottom: 0.4rem;
}

.arch-connector {
  display: flex;
  justify-content: center;
  padding: 0.15rem 0;
  color: var(--arch-border);
}

.arch-connector::before {
  content: "";
  width: 2px;
  height: 14px;
  background: linear-gradient(var(--arch-cyan), var(--arch-border));
  border-radius: 1px;
}

.arch-box {
  background: #fff;
  border: 1px solid var(--arch-border);
  border-radius: 0.5rem;
  padding: 0.55rem 0.65rem;
  box-shadow: 0 1px 3px rgba(0, 55, 122, 0.06);
}

.arch-box--primary {
  background: var(--arch-primary);
  border-color: var(--arch-primary);
  color: #fff;
  text-align: center;
}

.arch-box--accent {
  border-color: var(--arch-cyan);
  background: linear-gradient(180deg, #fff 0%, var(--arch-surface) 100%);
}

.arch-box--wide {
  grid-column: 1 / -1;
}

.arch-box__head {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--arch-primary);
  margin: 0 0 0.35rem;
  line-height: 1.25;
}

.arch-box--primary .arch-box__head,
.arch-box--primary .arch-box__sub {
  color: #fff;
}

.arch-box__sub {
  font-size: 0.55rem;
  font-weight: 500;
  color: var(--arch-muted);
  margin: 0 0 0.35rem;
  font-family: "JetBrains Mono", monospace;
}

.arch-box__list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.58rem;
  line-height: 1.35;
  color: var(--arch-muted);
}

.arch-box__list li {
  position: relative;
  padding-left: 0.65rem;
  margin-bottom: 0.12rem;
}

.arch-box__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--arch-cyan);
}

.arch-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
}

.arch-chip {
  font-size: 0.55rem;
  font-weight: 600;
  padding: 0.25rem 0.45rem;
  border-radius: 999px;
  background: var(--arch-surface);
  border: 1px solid var(--arch-border);
  color: var(--arch-text);
  white-space: nowrap;
}

.arch-grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.45rem;
}

@media (min-width: 640px) {
  .arch-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.arch-grid-core {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.45rem;
}

@media (min-width: 900px) {
  .arch-grid-core {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 2fr) minmax(0, 0.95fr);
    align-items: stretch;
  }
}

.arch-tos {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
}

@media (min-width: 640px) {
  .arch-tos {
    grid-template-columns: repeat(3, 1fr);
  }
}

.arch-tos .arch-box__head {
  font-size: 0.6rem;
}

.arch-infra {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.35rem;
}

@media (min-width: 640px) {
  .arch-infra {
    grid-template-columns: repeat(5, 1fr);
  }
}

.arch-infra .arch-box {
  text-align: center;
  padding: 0.45rem 0.35rem;
}

.arch-infra .arch-box__head {
  font-size: 0.55rem;
  margin-bottom: 0.15rem;
}

.arch-infra .arch-box__sub {
  font-size: 0.5rem;
  margin: 0;
}

.arch-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 1024px) {
  .arch-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 220px);
    gap: 1.25rem;
    align-items: start;
  }
}

.arch-flows {
  background: #fff;
  border: 1px solid var(--arch-border);
  border-radius: 0.5rem;
  padding: 0.65rem 0.75rem;
  border-left: 3px solid var(--arch-cyan);
}

.arch-flows__title {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--arch-primary);
  margin: 0 0 0.5rem;
}

.arch-flow {
  margin-bottom: 0.45rem;
}

.arch-flow:last-child {
  margin-bottom: 0;
}

.arch-flow__name {
  font-size: 0.58rem;
  font-weight: 700;
  color: var(--arch-cyan);
  margin: 0 0 0.1rem;
}

.arch-flow__path {
  font-size: 0.52rem;
  line-height: 1.35;
  color: var(--arch-muted);
  margin: 0;
  font-family: "JetBrains Mono", monospace;
}

.arch-external .arch-box__list li::before {
  background: var(--arch-primary);
}