/* Engraved technical studies. Each path is editable geometry, independent of raster art. */
.protocol-atlas, .protocol-scene, .redbox-study, .redundancy-health { margin: 36px 0 48px; padding: 28px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.plate-id { display: block; font: 400 10px/1.5 var(--mono); letter-spacing: .07em; text-transform: uppercase; color: #733125; }
.protocol-atlas > figcaption { display: grid; gap: 14px; margin-bottom: 28px; }
.atlas-title { font: 400 clamp(28px, 3.3vw, 43px)/1.08 var(--serif); color: #242722; }
.atlas-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.atlas-study { min-width: 0; }
.atlas-study:nth-child(even) { border-left: 1px solid var(--rule); padding-left: 24px; }
.article .atlas-study p { font-size: 14px; line-height: 1.5; margin: 6px 0 18px; }
.protocol-topology { width: 100%; height: auto; overflow: visible; }
.construction { fill: none; stroke: #8c3e2f; stroke-width: .7; opacity: .23; }
.physical-path { fill: none; stroke: #85877d; stroke-width: 2; }
.route { fill: none; stroke: #8c3e2f; stroke-width: 2.6; }
.route-b { stroke: #a27838; }
.packet-path { fill: none; stroke: none; }
.packet { fill: #8c3e2f; opacity: 0; }
.packet-b { fill: #a27838; }
.node-label, .domain-label, .blocked-label { font: 11px var(--mono); fill: #595d55; }
.domain-label { font-size: 14px; }
.network-domain { fill: none; stroke: #85877d; stroke-width: .8; stroke-dasharray: 2 5; }
.blocked-link { fill: none; stroke: var(--paper); stroke-width: 5; stroke-dasharray: 5 5; }
.blocked-label { font-size: 10px; }
.fault-mark { display: none; }
.fault-mark path:first-child { stroke: var(--paper); stroke-width: 18; }
.fault-mark path:last-child { stroke: #8c3e2f; stroke-width: 2; }
.protocol-scene[data-state=fault] .fault-mark, .protocol-scene[data-state=recovered] .fault-mark { display: block; }
.protocol-scene[data-protocol=RSTP] .route-b, .protocol-scene[data-protocol=MRP] .route-b { opacity: .13; }
.atlas-study[data-protocol=RSTP] .route-b, .atlas-study[data-protocol=MRP] .route-b { opacity: .13; }
.protocol-scene[data-state=fault][data-protocol=RSTP] .route-a, .protocol-scene[data-state=fault][data-protocol=MRP] .route-a { opacity: .18; }
.protocol-scene[data-state=recovered][data-protocol=RSTP] .route-a, .protocol-scene[data-state=recovered][data-protocol=MRP] .route-a { opacity: .18; }
.protocol-scene[data-state=recovered] .route-b { opacity: 1; }
.protocol-scene[data-state=recovered] .blocked-link, .protocol-scene[data-state=recovered] .blocked-label { display: none; }
.protocol-scene[data-state=fault][data-protocol=HSR] .route-a, .protocol-scene[data-state=fault][data-protocol=PRP] .route-a { opacity: .18; }
.scene-heading { display: flex; justify-content: space-between; gap: 20px; align-items: baseline; }
.scene-state { font: 400 11px/1.5 var(--mono); color: #595d55; }
.protocol-scene .protocol-topology { max-height: 420px; }
.protocol-scene > figcaption { font: 400 22px/1.3 var(--serif); color: #242722; margin-top: 12px; }
.delivery-state { display: block; min-height: 22px; margin-top: 10px; color: #733125; font: 400 11px/1.5 var(--mono); }
.scene-controls { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 12px; }
.scene-controls[hidden] { display: none; }
.scene-controls button { font: 400 12px var(--sans); color: #733125; border: 1px solid #8c3e2f55; background: transparent; padding: 12px 16px; min-height: 44px; cursor: pointer; }
.scene-controls button:hover, .scene-controls button[aria-pressed=true] { background: #8c3e2f; color: white; }
.article .study-note { font: 400 11px/1.6 var(--mono); color: #595d55; margin: 16px 0 0; }
.plate-download { display: inline-block; padding: 12px 0; font: 400 11px var(--mono); text-decoration: none; color: #733125; }
.substation-plate { margin: 36px -60px 40px; }
.article .substation-art img { border: 0; padding: 0; margin: 0; background: transparent; width: 100%; height: auto; }
.substation-plate figcaption { display: flex; justify-content: space-between; gap: 18px; padding: 16px 0; font-size: 12px; color: #595d55; }
.redbox-study figcaption { display: flex; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.redbox-study svg { width: 100%; height: auto; font: 400 18px var(--serif); fill: #242722; }
.redbox-study svg .node-label { font-size: 11px; }
.redbox-key { display: none; }
.health-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; padding: 32px 0 16px; }
.health-comparison > div { display: flex; align-items: center; gap: 16px; font: 400 24px var(--serif); }
.health-dot { width: 15px; height: 15px; flex: none; border: 1px solid #595d55; border-radius: 50%; background: #595d55; }
.health-dot.lost { background: transparent; border-color: #8c3e2f; position: relative; }
.health-dot.lost::after { content: ''; position: absolute; left: 1px; top: 6px; width: 11px; height: 1px; background: #8c3e2f; transform: rotate(-45deg); }
.article .redundancy-health > p { margin: 16px 0 0; font-size: 14px; color: #595d55; }
@media (max-width: 1320px) { .substation-plate { margin-left: 0; margin-right: 0; } }
@media (max-width: 700px) {
  .atlas-grid { grid-template-columns: 1fr; gap: 24px; }
  .atlas-study:nth-child(even) { padding-left: 0; border-left: 0; }
  .article .atlas-study p { font-size: 14px; }
  .atlas-study .node-label, .atlas-study .blocked-label { font-size: 18px; }
  .scene-heading { align-items: flex-start; gap: 12px; }
  .scene-state { font-size: 10px; text-align: right; max-width: 60%; }
  .protocol-scene > figcaption { font-size: 20px; }
  .substation-plate { margin: 28px 0 32px; }
  .substation-plate figcaption { padding-left: 0; padding-right: 0; flex-direction: column; gap: 5px; }
  .health-comparison { grid-template-columns: 1fr; gap: 24px; }
  .scene-controls button { font-size: 11px; padding: 12px; }
  .redbox-study svg { font-size: 26px; }
  .redbox-study svg .node-label { display: none; }
  .redbox-key { display: grid; gap: 6px; font-size: 12px; line-height: 1.5; color: #595d55; }
}