/* Case Studies — Layout and components
 * Builds on design-system.css + style.css
 */

/* ── Doc layout (matches campfire site pattern) ── */
.doc-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  min-height: calc(100vh - 64px);
}

.doc-sidebar {
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
  border-right: 1px solid var(--ds-border);
  padding: 32px 0;
  background: var(--ds-surface);
}

.sidebar-section { margin-bottom: 28px; padding: 0 20px; }

.sidebar-heading {
  font-family: var(--ds-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ds-accent-primary);
  margin-bottom: 10px;
}

.sidebar-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-links a {
  display: block;
  font-size: 14px;
  color: var(--ds-text-secondary);
  padding: 4px 8px;
  border-radius: 4px;
  text-decoration: none;
  transition: color 0.2s, background 0.2s;
}

.sidebar-links a:hover {
  color: var(--ds-text);
  background: var(--ds-surface-hover);
}

.sidebar-links a.active {
  color: var(--ds-accent-primary);
  font-weight: 500;
  background: rgba(217, 119, 6, 0.08);
}

/* ── Doc content ── */
.doc-content {
  padding: 56px 48px 80px;
  max-width: none;
  min-width: 0;
  flex: 1;
}

.doc-header { margin-bottom: 40px; }

.doc-label {
  font-family: var(--ds-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ds-accent-secondary);
  margin-bottom: 10px;
}

.doc-header h1 {
  font-family: var(--ds-font-body);
  font-weight: 700;
  font-size: 40px;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--ds-text);
}

.doc-header p {
  font-size: 20px;
  color: var(--ds-text-secondary);
  line-height: 1.6;
  max-width: 640px;
}

.doc-divider {
  border: none;
  border-top: 1px solid var(--ds-border);
  margin: 40px 0;
}

/* ── Doc typography ── */
.doc-content h2 {
  font-weight: 700;
  font-size: 28px;
  margin-top: 56px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ds-border);
  scroll-margin-top: 80px;
  color: var(--ds-text);
}

.doc-content h3 {
  font-weight: 600;
  font-size: 20px;
  margin-top: 36px;
  margin-bottom: 14px;
  color: var(--ds-text);
  scroll-margin-top: 80px;
}

.doc-content p {
  margin-bottom: 16px;
  line-height: 1.75;
  color: var(--ds-text);
}

.doc-content ul, .doc-content ol {
  margin: 12px 0 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.doc-content li { line-height: 1.7; color: var(--ds-text); }
.doc-content strong { font-weight: 600; color: var(--ds-text); }

.doc-content code {
  font-family: var(--ds-font-mono);
  font-size: 0.875em;
  background: var(--ds-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--ds-accent-secondary-light);
}

.doc-content pre {
  background: var(--ds-code-bg);
  border-radius: 8px;
  padding: 20px 24px;
  overflow-x: auto;
  margin: 20px 0;
}

.doc-content pre code {
  font-family: var(--ds-font-mono);
  font-size: 13px;
  background: none;
  padding: 0;
  color: var(--ds-text);
  line-height: 1.7;
}

/* ── Note boxes ── */
.doc-note {
  border-left: 4px solid var(--ds-accent-secondary);
  background: rgba(13, 148, 136, 0.08);
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 24px 0;
}

.doc-note p { margin-bottom: 0; font-size: 15px; }
.doc-note strong { color: var(--ds-accent-secondary-light); }

/* ── Proof stats (number grid) ── */
.proof-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  margin: 48px 0 32px;
  flex-wrap: wrap;
}

.proof-stat { text-align: center; }

.proof-num {
  font-weight: 700;
  font-size: 56px;
  line-height: 1;
  color: var(--ds-accent-primary);
  margin-bottom: 8px;
}

.proof-label {
  font-size: 14px;
  color: var(--ds-text-secondary);
  font-weight: 500;
}

/* ── Agent grid ── */
.agent-grid {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0;
}

.agent-card {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 14px;
}

.agent-card span {
  color: var(--ds-text-secondary);
  font-size: 13px;
}

.agent-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── Phase table ── */
.phase-table {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 24px 0;
}

.phase-row {
  display: grid;
  grid-template-columns: 40px 140px 1fr 56px;
  gap: 16px;
  padding: 12px 16px;
  background: var(--ds-surface);
  border-radius: 6px;
  align-items: center;
  font-size: 14px;
}

.phase-num {
  font-family: var(--ds-font-mono);
  font-weight: 600;
  color: var(--ds-accent-secondary);
  font-size: 13px;
}

.phase-name {
  font-weight: 600;
  color: var(--ds-text);
}

.phase-desc {
  color: var(--ds-text-secondary);
}

.phase-count {
  font-family: var(--ds-font-mono);
  font-weight: 600;
  color: var(--ds-accent-primary);
  text-align: right;
  font-size: 13px;
}

/* ── Convention grid ── */
.convention-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin: 24px 0;
}

.convention-card {
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: 8px;
  padding: 16px 20px;
}

.convention-name {
  font-weight: 600;
  color: var(--ds-text);
  margin-bottom: 6px;
}

.convention-ops {
  font-family: var(--ds-font-mono);
  font-size: 12px;
  color: var(--ds-accent-secondary);
}

/* ── Topology spec ── */
.topology-spec {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin: 24px 0;
  padding: 20px 24px;
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: 8px;
}

.topo-item { display: flex; gap: 8px; align-items: baseline; }

.topo-label {
  font-family: var(--ds-font-mono);
  font-size: 12px;
  color: var(--ds-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.topo-val {
  font-weight: 600;
  color: var(--ds-accent-primary);
}

/* ── Result table ── */
.result-table {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 24px 0;
}

.result-row {
  display: grid;
  grid-template-columns: 1fr 100px 120px 100px;
  gap: 16px;
  padding: 14px 20px;
  background: var(--ds-surface);
  border-radius: 6px;
  align-items: center;
  font-size: 15px;
}

.result-header {
  background: transparent;
  font-family: var(--ds-font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ds-text-muted);
  padding-bottom: 8px;
}

.result-mode { font-weight: 600; color: var(--ds-text); }
.result-version {
  font-family: var(--ds-font-mono);
  font-size: 11px;
  color: var(--ds-text-muted);
  margin-left: 6px;
}

.result-sends {
  font-family: var(--ds-font-mono);
  color: var(--ds-text-secondary);
  text-align: right;
}

.result-ratio {
  font-family: var(--ds-font-mono);
  font-weight: 600;
  text-align: right;
}

.result-reduction {
  font-family: var(--ds-font-mono);
  text-align: right;
}

.result-flood .result-ratio { color: var(--ds-error); }
.result-pv .result-ratio { color: var(--ds-warning); }
.result-spt .result-ratio { color: var(--ds-success); }
.result-spt .result-reduction { color: var(--ds-success); font-weight: 600; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .doc-layout {
    grid-template-columns: 1fr;
  }
  .doc-sidebar { display: none; }
  .doc-content { padding: 40px 24px 60px; }
  .doc-header h1 { font-size: 32px; }
  .proof-stats { gap: 40px; }
  .proof-num { font-size: 40px; }
  .phase-row { grid-template-columns: 40px 1fr 56px; }
  .phase-desc { display: none; }
  .result-row { grid-template-columns: 1fr 80px 80px; }
  .result-reduction { display: none; }
  .topology-spec { gap: 20px; }
}