/* Architecture themes only. Layout, routes and motion are owned by architecture.css.
   Variables are declared on each new surface so detached dialogs keep their theme. */

body[data-version="a"] :is(.arch-diagram, .arch-dialog, .arch-tabs, .arch-toolbar, .arch-legend, .arch-inspector) {
  --arch-ink: #183b2a;
  --arch-muted: #6b8071;
  --arch-surface: #f7faf6;
  --arch-border: #c3d1c4;
  --arch-flow: #34774f;
  --arch-root: #255f40;
  --arch-root-ink: #f7fcf6;
  --arch-dialog-surface: #fbfcfa;
  --arch-node-texture: repeating-linear-gradient(135deg, rgba(28, 74, 43, .018) 0, rgba(28, 74, 43, .018) 1px, transparent 1px, transparent 5px);
  --arch-group-surface: rgba(50, 112, 71, .025);
  --arch-flow-glow: none;
}

body[data-version="b"] :is(.arch-diagram, .arch-dialog, .arch-tabs, .arch-toolbar, .arch-legend, .arch-inspector) {
  --arch-ink: #161616;
  --arch-muted: #666b6b;
  --arch-surface: #ffffff;
  --arch-border: #d4d8d8;
  --arch-flow: #e04432;
  --arch-root: #b93123;
  --arch-root-ink: #ffffff;
  --arch-dialog-surface: #ffffff;
  --arch-node-texture: repeating-linear-gradient(0deg, rgba(22, 22, 22, .017) 0, rgba(22, 22, 22, .017) 1px, transparent 1px, transparent 5px);
  --arch-group-surface: rgba(22, 22, 22, .018);
  --arch-flow-glow: none;
}

body[data-version="c"] :is(.arch-diagram, .arch-dialog, .arch-tabs, .arch-toolbar, .arch-legend, .arch-inspector) {
  --arch-ink: #e2ecea;
  --arch-muted: #8da6a5;
  --arch-surface: #132326;
  --arch-border: rgba(166, 193, 190, .3);
  --arch-flow: #b3e7d4;
  --arch-root: #b3e7d4;
  --arch-root-ink: #10332b;
  --arch-dialog-surface: #0a171b;
  --arch-node-texture: repeating-linear-gradient(135deg, rgba(206, 231, 228, .023) 0, rgba(206, 231, 228, .023) 1px, transparent 1px, transparent 5px);
  --arch-group-surface: rgba(182, 210, 205, .025);
  --arch-flow-glow: drop-shadow(0 0 3px rgba(179, 231, 212, .3));
}

/* Surface treatments deliberately keep the diagram's geometry unchanged. */
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-diagram {
  color: var(--arch-ink);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node {
  color: var(--arch-ink);
  border: 1px solid var(--arch-border);
  border-color: var(--arch-border);
  border-radius: 0;
  background-color: var(--arch-surface);
  background-image: var(--arch-node-texture);
  box-shadow: none;
  text-shadow: none;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node:hover {
  border-color: var(--arch-flow);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node:focus-visible {
  outline: 2px solid var(--arch-flow);
  outline-offset: 4px;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node:is(.is-selected, [aria-pressed="true"]) {
  border-color: var(--arch-flow);
  outline: 1px solid var(--arch-flow);
  outline-offset: 3px;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node-code {
  color: var(--arch-flow);
  font-family: Arial, sans-serif;
  font-weight: 500;
  letter-spacing: .09em;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node-title {
  color: var(--arch-ink);
  font-weight: 700;
  letter-spacing: -.02em;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node-desc {
  color: var(--arch-muted);
  font-weight: 400;
}

/* Root = authority, terminal = completion, diamond = decision, dashed = reference. */
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-root {
  background-color: var(--arch-root);
  background-image: none;
  color: var(--arch-root-ink);
  border-color: var(--arch-root);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-root :is(.arch-node-code, .arch-node-title, .arch-node-desc) {
  color: var(--arch-root-ink);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-root .arch-node-code,
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-root .arch-node-desc {
  opacity: .84;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-terminal {
  border-color: var(--arch-flow);
  box-shadow: inset 3px 0 0 var(--arch-flow);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-decision {
  border-color: var(--arch-flow);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-decision .arch-node-code::before {
  content: "◇";
  display: inline;
  margin-right: .5em;
  color: inherit;
  font-family: Arial, sans-serif;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-reference {
  border-style: dashed;
  box-shadow: none;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-node.is-reference .arch-node-code {
  color: var(--arch-muted);
}

/* Static silver/green construction lines + one theme-colored animated signal. */
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-edge-base {
  stroke: var(--arch-border);
  opacity: 1;
  fill: none;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-edge-flow {
  stroke: var(--arch-flow);
  fill: none;
  opacity: .88;
  filter: var(--arch-flow-glow);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-edge-arrow {
  fill: var(--arch-flow);
  stroke: none;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-edge-label {
  fill: var(--arch-muted);
  color: var(--arch-muted);
  font-weight: 500;
  letter-spacing: .02em;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-group-box {
  fill: var(--arch-group-surface);
  stroke: var(--arch-border);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-group-title {
  fill: var(--arch-muted);
  color: var(--arch-muted);
  font-weight: 600;
  letter-spacing: .04em;
}
body[data-version="b"] .arch-edge-base { opacity: .83; }
body[data-version="b"] .arch-group-box { stroke-dasharray: 4 5; }
body[data-version="c"] .arch-edge-base { stroke: rgba(180, 206, 203, .36); }
body[data-version="c"] .arch-node-title { font-weight: 650; }
body[data-version="c"] .arch-node.is-root { box-shadow: 0 0 0 1px rgba(179, 231, 212, .17); }

/* The dialog shell and controls inherit the same role-based palette. */
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-dialog {
  background-color: var(--arch-dialog-surface);
  color: var(--arch-ink);
  border-color: var(--arch-border);
  border-radius: 0;
  box-shadow: 0 22px 70px rgba(0, 0, 0, .2);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-dialog::backdrop { background: rgba(10, 18, 18, .55); }
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-dialog :is(h2, h3) { color: var(--arch-ink); }
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-tabs {
  background: transparent;
  border-color: var(--arch-border);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-tab {
  background: transparent;
  color: var(--arch-muted);
  border-color: var(--arch-border);
  border-radius: 0;
  box-shadow: none;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-tab:hover { color: var(--arch-flow); }
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-tab[aria-pressed="true"] {
  color: var(--arch-ink);
  background-color: var(--arch-surface);
  border-color: var(--arch-border);
  box-shadow: inset 0 -2px 0 var(--arch-flow);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-toolbar {
  color: var(--arch-muted);
  background-color: var(--arch-surface);
  border-color: var(--arch-border);
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-toolbar :is(button, a) {
  background: transparent;
  color: var(--arch-ink);
  border-color: var(--arch-border);
  border-radius: 0;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-toolbar :is(button, a):hover { color: var(--arch-flow); border-color: var(--arch-flow); }
body:is([data-version="a"], [data-version="b"], [data-version="c"]) :is(.arch-toolbar, .arch-tabs) :is(button, a):focus-visible {
  outline: 2px solid var(--arch-flow);
  outline-offset: 3px;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-legend { color: var(--arch-muted); }
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-inspector {
  background-color: var(--arch-surface);
  color: var(--arch-ink);
  border-color: var(--arch-border);
  border-radius: 0;
}
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-inspector :is(p, li) { color: var(--arch-muted); }
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-inspector :is(strong, b, h3) { color: var(--arch-ink); }
body:is([data-version="a"], [data-version="b"], [data-version="c"]) .arch-inspector a { color: var(--arch-flow); }

@media (prefers-reduced-motion: reduce) {
  body[data-version="c"] .arch-edge-flow { filter: none; }
}