:root {
  --srsia-bg: #07111f;
  --srsia-panel: rgba(255, 255, 255, 0.055);
  --srsia-panel-strong: rgba(255, 255, 255, 0.09);
  --srsia-border: rgba(214, 230, 255, 0.16);
  --srsia-text: #edf6ff;
  --srsia-soft: #c9d8e8;
  --srsia-cyan: #54d6ff;
  --srsia-green: #39d98a;
  --srsia-amber: #ffc857;
  --srsia-rose: #ff6b8a;
  --srsia-violet: #a993ff;
}

.srsia-page {
  background:
    linear-gradient(180deg, rgba(7, 17, 31, 0.98), rgba(9, 18, 31, 0.96)),
    #07111f;
}

.srsia-hub-hero,
.srsia-article-hero {
  padding: clamp(4rem, 7vw, 7rem) 0 clamp(2rem, 4vw, 4rem);
  border-bottom: 1px solid var(--srsia-border);
  background:
    linear-gradient(110deg, rgba(84, 214, 255, 0.12), rgba(57, 217, 138, 0.08) 45%, rgba(255, 200, 87, 0.08));
}

.srsia-hub-hero h1,
.srsia-article-hero h1 {
  max-width: 980px;
  margin: 0 0 1rem;
  color: #fff;
  font-size: clamp(2.35rem, 6vw, 5rem);
  line-height: 1;
  letter-spacing: 0;
}

.srsia-kicker {
  display: inline-flex;
  color: var(--srsia-cyan);
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-decoration: none;
  margin-bottom: 1rem;
}

.srsia-deck {
  max-width: 860px;
  color: var(--srsia-soft);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  line-height: 1.65;
}

.srsia-actions,
.srsia-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
  margin-top: 1.4rem;
}

.srsia-meta-row span,
.srsia-note {
  color: var(--srsia-soft);
  font-size: 0.95rem;
}

.srsia-platform-disclosure {
  max-width: 860px;
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(84, 214, 255, 0.24);
  border-radius: 8px;
  background: rgba(84, 214, 255, 0.08);
}

.srsia-platform-disclosure a {
  color: var(--srsia-cyan);
  font-weight: 700;
}

.srsia-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
  gap: 2rem;
  align-items: start;
}

.srsia-scenario-card,
.srsia-hub-band,
.srsia-series-card,
.srsia-content section,
.srsia-toc,
.srsia-architecture .node {
  border: 1px solid var(--srsia-border);
  border-radius: 8px;
  background: var(--srsia-panel);
}

.srsia-scenario-card {
  padding: 1.25rem;
}

.srsia-scenario-card h2,
.srsia-hub-section h2,
.srsia-content h2,
.srsia-content h3 {
  color: #fff;
  letter-spacing: 0;
}

.srsia-scenario-card dl {
  margin: 0;
}

.srsia-scenario-card div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0.8rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--srsia-border);
}

.srsia-scenario-card dt {
  color: var(--srsia-soft);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.srsia-scenario-card dd {
  margin: 0;
  color: var(--srsia-text);
}

.srsia-hub-section {
  margin-top: 3rem;
}

.srsia-hub-band {
  padding: clamp(1.5rem, 3vw, 2.4rem);
  background: linear-gradient(135deg, rgba(84, 214, 255, 0.09), rgba(255, 200, 87, 0.08));
}

.srsia-hub-band p,
.srsia-content p,
.srsia-content li,
.srsia-content summary,
.srsia-source-list li {
  color: var(--srsia-soft);
  line-height: 1.72;
}

.srsia-article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.srsia-series-card {
  display: block;
  padding: 1rem;
  text-decoration: none;
  color: inherit;
  min-height: 220px;
}

.srsia-series-card span {
  color: var(--srsia-amber);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.srsia-series-card h3 {
  margin: 0.75rem 0;
  color: #fff;
}

.srsia-series-card p {
  color: var(--srsia-soft);
}

.srsia-article .srsia-content {
  max-width: 980px;
  padding-top: 2rem;
}

.srsia-content section {
  padding: clamp(1.25rem, 3vw, 2rem);
  margin: 1.15rem 0;
}

.srsia-content section:first-of-type {
  margin-top: 0;
}

.srsia-toc {
  position: sticky;
  top: 82px;
  z-index: 5;
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  padding: 0.6rem;
  margin-bottom: 1rem;
  background: rgba(7, 17, 31, 0.92);
  backdrop-filter: blur(12px);
}

.srsia-toc a {
  white-space: nowrap;
  color: var(--srsia-soft);
  text-decoration: none;
  border: 1px solid var(--srsia-border);
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  font-size: 0.88rem;
}

.srsia-table-wrap {
  overflow-x: auto;
}

.srsia-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

.srsia-table th,
.srsia-table td {
  border: 1px solid var(--srsia-border);
  padding: 0.85rem;
  text-align: left;
  vertical-align: top;
}

.srsia-table th {
  color: #fff;
  background: rgba(84, 214, 255, 0.12);
}

.srsia-table td {
  color: var(--srsia-soft);
}

.srsia-infographic {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.srsia-infographic div {
  border-left: 4px solid var(--srsia-green);
  background: rgba(255, 255, 255, 0.06);
  padding: 1rem;
  border-radius: 8px;
}

.srsia-infographic strong {
  display: block;
  color: #fff;
  margin-bottom: 0.4rem;
}

.srsia-infographic span {
  color: var(--srsia-soft);
}

.srsia-flow-list {
  counter-reset: flow;
  display: grid;
  gap: 0.8rem;
  padding: 0;
  list-style: none;
}

.srsia-flow-list li {
  counter-increment: flow;
  border: 1px solid var(--srsia-border);
  border-radius: 8px;
  padding: 0.9rem 0.9rem 0.9rem 3rem;
  position: relative;
  background: rgba(255, 255, 255, 0.045);
}

.srsia-flow-list li::before {
  content: counter(flow);
  position: absolute;
  left: 0.85rem;
  top: 0.85rem;
  width: 1.5rem;
  height: 1.5rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--srsia-amber);
  color: #152036;
  font-weight: 800;
}

.srsia-two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.srsia-content pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--srsia-border);
  background: rgba(0, 0, 0, 0.24);
}

.srsia-content details {
  border-top: 1px solid var(--srsia-border);
  padding: 1rem 0;
}

.srsia-content summary {
  cursor: pointer;
  color: #fff;
  font-weight: 700;
}

.srsia-content a,
.srsia-source-list a {
  color: var(--srsia-cyan);
}

.srsia-architecture {
  display: grid;
  grid-template-columns: repeat(5, minmax(120px, 1fr));
  gap: 0.75rem;
}

.srsia-architecture .node {
  min-height: 120px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 1rem;
  color: #fff;
}

.srsia-architecture small {
  color: var(--srsia-soft);
}

.srsia-architecture .retailer { border-color: rgba(84, 214, 255, 0.55); }
.srsia-architecture .layer { border-color: rgba(255, 200, 87, 0.65); }
.srsia-architecture .supplier { border-color: rgba(57, 217, 138, 0.55); }
.srsia-architecture .finance { border-color: rgba(255, 107, 138, 0.55); }

@media (max-width: 850px) {
  .srsia-hero-grid,
  .srsia-architecture {
    grid-template-columns: 1fr;
  }

  .srsia-toc {
    position: relative;
    top: auto;
  }
}