/* ============================================================
   Case study pages. Article layout: one column of prose,
   data in real tables, diagrams as monospace rather than chrome.
   ============================================================ */

/* ---------- Hero ---------- */

.cs-hero { padding-top: clamp(48px, 8vh, 84px); }

.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-bottom: 22px;
}
.cs-tags .card-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--muted);
}
.cs-tags .card-tag + .card-tag::before {
  content: "·";
  margin-right: 18px;
  color: var(--rule-hard);
}

.cs-hero h1 { max-width: 24ch; }

.cs-hero .lede { margin-top: 24px; }

.cs-actions {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.meta-row {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 22px 32px;
}
.meta-cell { display: grid; gap: 5px; }
.meta-cell .k {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--muted);
}
.meta-cell .v { font-size: 15px; color: var(--ink-2); }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  color: var(--ink-3);
}
.back-link:hover { color: var(--ink); }
.back-link svg { width: 15px; height: 15px; }

@media (max-width: 560px) {
  .back-link { font-size: 13px; white-space: nowrap; }
  .nav-inner .nav-cta { padding: 6px 12px; font-size: 12.5px; white-space: nowrap; }
}

/* ---------- Sections ---------- */

.cs-section { padding: clamp(44px, 6vh, 72px) 0; }
.cs-section + .cs-section { padding-top: 0; }

.cs-section h2 {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 28px;
}
.cs-section h2 .idx {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.prose, .intro {
  max-width: var(--prose);
  font-size: 17px;
  line-height: 1.72;
  color: var(--ink-2);
}
.intro { margin: 0 0 24px; }
.prose p + p { margin-top: 1.05em; }

/* ---------- Result figures ---------- */

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0;
  margin-bottom: 34px;
}
.result-cell {
  padding: 22px 26px 22px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.result-cell .big {
  font-family: var(--display);
  font-size: clamp(28px, 3.4vw, 38px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.result-cell .big .u { font-size: 0.62em; color: var(--ink-3); }
.result-cell .cap {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-3);
  max-width: 30ch;
}

/* ---------- Tables ---------- */

.table-scroll {
  overflow-x: auto;
  margin: 4px 0 8px;
  -webkit-overflow-scrolling: touch;
}
table.results {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
table.results th {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: left;
  padding: 0 20px 10px 0;
  border-bottom: 1px solid var(--rule-hard);
  white-space: nowrap;
}
table.results td {
  padding: 12px 20px 12px 0;
  border-bottom: 1px solid var(--rule-soft);
  color: var(--ink-2);
  vertical-align: baseline;
}
table.results td:first-child { color: var(--ink); }
table.results tr.win td { background: var(--accent-wash); }
table.results tr.win td:first-child { box-shadow: inset 2px 0 0 var(--accent); }
table.results td.mono, .mono {
  font-family: var(--mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
table.results td .pass, .pass { color: var(--pos); }

/* ---------- Architecture strip ---------- */

.arch {
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--card);
  margin-bottom: 34px;
}
.arch-scroll {
  overflow-x: auto;
  padding: 24px;
  -webkit-overflow-scrolling: touch;
}
.arch-track {
  display: flex;
  align-items: stretch;
  gap: 0;
  min-width: max-content;
}
.arch-col { display: flex; }
.arch-node {
  min-width: 132px;
  max-width: 168px;
  padding: 14px 16px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper);
}
.arch-node .t {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.arch-node .n {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--ink);
}
.arch-node .sub {
  margin-top: 5px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  line-height: 1.4;
}
.arch-node.primary { border-color: var(--accent-line); background: var(--accent-wash); }
.arch-node.store { border-style: dashed; }

.arch-arrow {
  display: flex;
  align-items: center;
  padding: 0 10px;
  color: var(--rule-hard);
}
.arch-arrow svg { width: 16px; height: 16px; }

.arch-caption {
  margin: 0;
  padding: 14px 24px;
  border-top: 1px solid var(--rule-soft);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-3);
}
.arch-infra {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 14px 24px;
  border-top: 1px solid var(--rule-soft);
  background: var(--paper-2);
  border-radius: 0 0 4px 4px;
}
.arch-infra .lbl {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--muted);
}
.arch-infra .items {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-size: 13px;
  color: var(--ink-3);
}
.arch-infra .items span + span::before {
  content: "·";
  margin-right: 14px;
  color: var(--rule-hard);
}

/* ---------- Numbered flow ---------- */

.flow { display: grid; }
.flow-step {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 0 22px;
  padding: 26px 0;
  border-top: 1px solid var(--rule-soft);
}
.flow-step:first-child { border-top: 1px solid var(--rule); }
.flow-step:last-child { border-bottom: 1px solid var(--rule-soft); }

.flow-rail { display: block; }
.flow-node {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  padding-top: 3px;
}
.flow-connector { display: none; }

.flow-body h3 {
  font-size: 19px;
  margin-bottom: 8px;
}
.flow-body p {
  max-width: var(--prose);
  font-size: 16px;
  line-height: 1.68;
  color: var(--ink-2);
  margin: 0;
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
}
.chips span + span::before {
  content: "·";
  margin-right: 14px;
  color: var(--rule-hard);
}

/* ---------- Highlights (text blocks, no icon cards) ---------- */

.highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0 48px;
}
.hl-card {
  padding: 24px 0;
  border-top: 1px solid var(--rule-soft);
}
.hl-icon { display: none; }
.hl-card h3 {
  font-size: 18px;
  margin-bottom: 7px;
}
.hl-card p {
  font-size: 15.5px;
  line-height: 1.62;
  color: var(--ink-2);
  margin: 0;
  max-width: 46ch;
}

/* ---------- Stack ---------- */

.stack-block { border-top: 1px solid var(--rule); }
.stack-row {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 6px 28px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.stack-row .layer {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 4px;
}
.stack-row .items {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  font-size: 15px;
  color: var(--ink-2);
}
.stack-row .items span + span::before {
  content: "·";
  margin-right: 16px;
  color: var(--rule-hard);
}
@media (max-width: 620px) {
  .stack-row { grid-template-columns: 1fr; }
}

/* ---------- Closing CTA + pager ---------- */

.cs-cta {
  padding-top: 44px;
  border-top: 1px solid var(--rule);
}
.cs-cta h2 {
  border: 0;
  padding: 0;
  margin: 0 0 14px;
  display: block;
  max-width: 26ch;
}
.cs-cta p {
  max-width: var(--prose);
  color: var(--ink-2);
  margin: 0;
}
.cs-cta .cs-actions { margin-top: 26px; }

.pager {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  gap: 24px;
}
.pager a { max-width: 46%; }
.pager .next { text-align: right; }
.pager .dir {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 5px;
}
.pager .name {
  font-family: var(--display);
  font-size: 18px;
  line-height: 1.25;
  color: var(--ink-2);
}
.pager a:hover .name { color: var(--accent); }