/* Physical design figures: layouts (tools/templates/v3/layout-svg.mjs) and timing paths
   (tools/templates/v3/path-svg.mjs). The card, heading, controls, step notes, text view and caption come
   from diagrams.css. Both figures sit on the waveform screen (--wave-*), like plots: a layout reads like a
   placement viewer, a path like a timeline. Every colour is a theme token. Cell kinds: flops --wave-x,
   logic --wave-signal, buffers --wave-z, the clock tree --wave-cursor, clock gates --wave-expected, taps
   --wave-text (solid, so a one-site tap reads even inside a met4 stripe) and fill --wave-text, faint. Power
   stripes are outlines with a faint tint, drawn behind the cells. Slack: met --ok, violated --hot (the instrument LEDs, made for the screen). */

/* ---------- layouts ---------- */
.layout-stage, .path-stage { background: var(--wave-bg); color: var(--wave-text); }
.ly-legend, .pt-legend { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; padding: 14px 20px 0; list-style: none; color: var(--wave-text); font: 500 13px/1.4 var(--sans); }
.ly-legend li, .pt-legend li { display: inline-flex; align-items: center; gap: 8px; }
.ly-key, .pt-key { flex: none; display: inline-block; width: 14px; height: 10px; border-radius: 2px; }
.ly-key-cell.ly-k-seq { background: var(--wave-x); }
.ly-key-cell.ly-k-comb { background: var(--wave-signal); }
.ly-key-cell.ly-k-buf { background: var(--wave-z); }
.ly-key-cell.ly-k-clock { background: var(--wave-cursor); }
.ly-key-cell.ly-k-icg { background: var(--wave-expected); }
.ly-key-cell.ly-k-tap, .ly-key-cell.ly-k-fill { width: 5px; height: 12px; background: var(--wave-text); }
.ly-key-cell.ly-k-fill { opacity: .4; }
.ly-key-clock { height: 0; border-top: 2px solid var(--wave-cursor); border-radius: 0; }
.ly-key-heat { width: 40px; background: linear-gradient(90deg, var(--wave-signal) 0 25%, var(--wave-marker) 25% 50%, var(--wave-x) 50% 75%, var(--wave-mismatch) 75%); }
.ly-key-pdn { border: 1px solid var(--wave-dontcare); background: transparent; }
.ly-key-pin { width: 9px; height: 9px; transform: rotate(45deg); background: var(--wave-text); border-radius: 1px; }
.ly-key-route { height: 0; border-top: 2px solid; border-radius: 0; }
.ly-metrics-strip { padding: 10px 20px 0; }
.ly-metrics { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 0; font: 500 12.5px/1.4 var(--mono); }
.ly-metrics[hidden] { display: none; }
.ly-metrics div { display: flex; gap: 7px; }
.ly-metrics dt { color: var(--wave-muted); font-weight: 400; }
.ly-metrics dd { margin: 0; color: var(--wave-text); font-variant-numeric: tabular-nums; }
.ly-metrics-stage dd { color: var(--wave-marker); font-weight: 600; }
.layout-screen { position: relative; margin: 10px 12px 12px; border: 1px solid var(--wave-grid); border-radius: var(--r-ctl); background: var(--wave-bg); overflow: hidden; }
.layout-screen:focus-visible { outline-offset: 2px; }
.layout-screen[data-ly-zoomed] { cursor: grab; touch-action: none; }
.layout-screen[data-ly-dragging] { cursor: grabbing; }
.layout-svg { display: block; width: 100%; height: auto; max-height: min(78vh, 760px); aspect-ratio: 1 / 1; margin: 0 auto; }
.ly-zoom { position: absolute; top: 8px; right: 8px; z-index: 1; display: flex; gap: 4px; }
.ly-zoom[hidden] { display: none; }
.ly-zoom-btn { min-width: 34px; min-height: 34px; padding: 0 8px; border: 1px solid var(--wave-grid); border-radius: var(--r-chip); background: var(--wave-alt); color: var(--wave-text); font: 600 15px/1 var(--mono); cursor: pointer; }
.ly-zoom-btn:hover { border-color: var(--wave-muted); }
.ly-zoom-btn:focus-visible { outline: var(--focus-w) solid var(--focus); outline-offset: 1px; }
.ly-zoom-fit { font-size: 12px; }
.ly-die { fill: var(--wave-alt); stroke: var(--wave-muted); stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.ly-core { fill: none; stroke: var(--wave-muted); stroke-width: 1; stroke-dasharray: 4 3; vector-effect: non-scaling-stroke; }
.ly-row { fill: none; stroke: var(--wave-grid); stroke-width: .6; vector-effect: non-scaling-stroke; }
.ly-row-alt { fill: var(--wave-bus-fill); }
.ly-cell { stroke: none; }
.ly-k-seq { fill: var(--wave-x); }
.ly-k-comb { fill: var(--wave-signal); fill-opacity: .82; }
.ly-k-buf { fill: var(--wave-z); }
.ly-k-clock { fill: var(--wave-cursor); }
.ly-k-icg { fill: var(--wave-expected); }
.ly-k-tap { fill: var(--wave-text); }
.ly-k-fill { fill: var(--wave-text); fill-opacity: .4; }
.ly-pdn > path { stroke: none; }
.ly-pdn > .ly-pdn-met4, .ly-pdn > .ly-pdn-met5 { fill: var(--wave-dontcare); fill-opacity: .08; stroke: var(--wave-dontcare); stroke-opacity: .7; stroke-width: 1; vector-effect: non-scaling-stroke; }
.ly-pdn-met1 { fill: var(--wave-dontcare); fill-opacity: .1; }
.ly-pin-in { fill: var(--wave-text); }
.ly-pin-out { fill: var(--wave-bg); stroke: var(--wave-text); stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.ly-pin-inout { fill: var(--wave-muted); }
.ly-clock-net { fill: none; stroke: var(--wave-cursor); stroke-width: 1.3; stroke-opacity: .9; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.ly-clock-root { fill: var(--wave-bg); stroke: var(--wave-cursor); stroke-width: 2; vector-effect: non-scaling-stroke; }
.ly-route { fill: none; stroke-width: 1.5; stroke-opacity: .9; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.ly-route-li1 { stroke: var(--wave-weak); color: var(--wave-weak); }
.ly-route-met1 { stroke: var(--wave-z); color: var(--wave-z); }
.ly-route-met2 { stroke: var(--wave-signal); color: var(--wave-signal); }
.ly-route-met3 { stroke: var(--wave-expected); color: var(--wave-expected); }
.ly-route-met4 { stroke: var(--wave-x); color: var(--wave-x); }
.ly-route-met5 { stroke: var(--wave-marker); color: var(--wave-marker); }
.ly-key-route.ly-route-li1, .ly-key-route.ly-route-met1, .ly-key-route.ly-route-met2, .ly-key-route.ly-route-met3, .ly-key-route.ly-route-met4, .ly-key-route.ly-route-met5 { border-top-color: currentColor; }
.ly-heat { stroke: none; }
.ly-gcell { fill: none; stroke: var(--wave-grid); stroke-width: .6; vector-effect: non-scaling-stroke; }
.ly-heat-low { fill: var(--wave-signal); }
.ly-heat-mid { fill: var(--wave-marker); }
.ly-heat-high { fill: var(--wave-x); }
.ly-heat-hot { fill: var(--wave-mismatch); }
/* The static IR-drop map (build-only runs): four bands of the worst bin, cool to hot, over greyed cells. */
.ly-ir-low { fill: var(--wave-signal); fill-opacity: .35; }
.ly-ir-mid { fill: var(--wave-marker); fill-opacity: .55; }
.ly-ir-high { fill: var(--wave-x); fill-opacity: .7; }
.ly-ir-hot { fill: var(--wave-mismatch); fill-opacity: .85; }
.ly-key-ir { width: 40px; background: linear-gradient(90deg, var(--wave-signal) 0 25%, var(--wave-marker) 25% 50%, var(--wave-x) 50% 75%, var(--wave-mismatch) 75%); }
/* Macros: an outlined block with its signal pins and name. */
.ly-k-macro { fill: none; }
.ly-key-cell.ly-k-macro { background: transparent; border: 1.5px solid var(--wave-text); }
.ly-macro-box { fill: var(--wave-bus-fill); stroke: var(--wave-text); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.ly-macro-pin { fill: var(--wave-expected); }
.ly-macro-name { fill: var(--wave-muted); font-family: var(--mono); text-anchor: middle; dominant-baseline: middle; }
/* A lesson layout before its data arrives (assets/v3/pd.mjs). */
.ly-pending-note { fill: var(--wave-muted); font-family: var(--mono); text-anchor: middle; dominant-baseline: middle; }
.ly-noscript { margin: 0; padding: 0 16px 12px; color: var(--wave-muted); font: 13px/1.45 var(--mono); }
/* Stages and overlays: only the current stage, and only the overlays the step shows. */
.ly-stage { display: none; }
.ly-stage[data-ly-current] { display: inline; }
[data-ly-show] { display: none; }
[data-ly-show][data-ly-on] { display: inline; }
.layout-figure[data-ly-playing] .ly-stage[data-ly-current] { animation: ly-in var(--dur-2) var(--ease); }
@keyframes ly-in { from { opacity: .35; } }
/* Under routes or a congestion map the cells turn grey, so the heat reads first and never mixes with a kind's colour. */
.ly-stage:has(.ly-congestion[data-ly-on]) .ly-cell { fill: var(--wave-muted); fill-opacity: .16; }
.ly-stage:has(.ly-routes[data-ly-on]) .ly-cell { fill: var(--wave-muted); fill-opacity: .2; }
.ly-stage:has(.ly-ir[data-ly-on]) .ly-cell { fill: var(--wave-muted); fill-opacity: .14; }

/* ---------- timing paths ---------- */
.pt-summary { display: flex; flex-wrap: wrap; gap: 4px 18px; margin: 0; padding: 14px 20px 0; color: var(--wave-muted); font: 500 13px/1.45 var(--mono); }
.pt-summary b { color: var(--wave-text); font-weight: 600; }
.pt-key.pt-clock { background: var(--wave-cursor); }
.pt-key.pt-cell { background: var(--wave-signal); }
.pt-key.pt-net { background: var(--wave-z); }
.pt-key.pt-external { background: var(--wave-dontcare); }
.pt-key.pt-uncertainty { background: repeating-linear-gradient(135deg, var(--wave-expected) 0 3px, transparent 3px 6px); border: 1px solid var(--wave-expected); }
.pt-key.pt-check { background: var(--wave-x); }
.path-screen { container-type: inline-size; padding: 10px 8px 6px; }
.path-svg { display: block; width: 100%; height: auto; margin: 0 auto; overflow: visible; }
.path-wide { max-width: 760px; }
.path-narrow { display: none; max-width: 480px; }
@container (max-width: 560px) {
  .path-wide { display: none; }
  .path-narrow { display: block; }
}
.pt-grid { stroke: var(--wave-grid); stroke-width: 1; }
.pt-axis-line { stroke: var(--wave-muted); stroke-width: 1; }
.pt-tick { fill: var(--wave-muted); font: 11.5px var(--mono); }
.pt-axis-title { fill: var(--wave-muted); font: 500 11.5px var(--sans); }
.pt-lane { fill: var(--wave-alt); stroke: var(--wave-grid); stroke-width: 1; }
.pt-lane-label { fill: var(--wave-text); font: 600 12.5px var(--sans); }
.pt-edge-line { stroke: var(--wave-cursor); stroke-width: 1.2; stroke-dasharray: 4 4; }
.pt-edge-label { fill: var(--wave-cursor); font: 600 11.5px var(--mono); }
.pt-bar { stroke: var(--wave-bg); stroke-width: 1; }
.pt-clock .pt-bar { fill: var(--wave-cursor); }
.pt-cell .pt-bar { fill: var(--wave-signal); }
.pt-net .pt-bar { fill: var(--wave-z); }
.pt-external .pt-bar { fill: var(--wave-dontcare); }
.pt-uncertainty .pt-bar { fill: var(--wave-expected); fill-opacity: .55; stroke: var(--wave-expected); stroke-dasharray: 3 2; }
.pt-crpr .pt-bar { fill: var(--wave-weak); }
.pt-check .pt-bar { fill: var(--wave-x); }
.pt-bar-label { fill: var(--wave-bg); font: 700 11px var(--mono); pointer-events: none; }
.pt-mark-line { stroke: var(--wave-text); stroke-width: 1.4; }
.pt-required-line { stroke-dasharray: 5 3; }
.pt-reading-bg { fill: var(--wave-bg); stroke: var(--wave-grid); stroke-width: 1; }
.pt-reading-text { fill: var(--wave-text); font: 600 11.5px var(--mono); }
.pt-slack-bracket { fill: none; stroke-width: 2; }
.pt-met .pt-slack-bracket { stroke: var(--ok); }
.pt-violated .pt-slack-bracket { stroke: var(--hot); }
.pt-slack-chip { fill: var(--wave-bg); stroke-width: 1.5; }
.pt-met .pt-slack-chip { stroke: var(--ok); }
.pt-violated .pt-slack-chip { stroke: var(--hot); }
.pt-slack-text { font: 700 12px var(--mono); }
.pt-met .pt-slack-text { fill: var(--ok); }
.pt-violated .pt-slack-text { fill: var(--hot); }
.path-figure[data-pt-focused] .pt-seg { opacity: .22; transition: opacity var(--dur-2) var(--ease); }
.path-figure[data-pt-focused] .pt-seg[data-on] { opacity: 1; }
.pt-report pre { max-height: 360px; overflow: auto; font-size: 12px; }
.path-text table, .layout-text table { font-variant-numeric: tabular-nums; }
.path-text td, .path-text th, .layout-text td { font-size: 13px; }
.path-text td:nth-child(n+4) { font-family: var(--mono); }

/* The focused step's note, as in a diagram. */
:is(.layout-figure[data-ly-focused], .path-figure[data-pt-focused]) .diagram-step-list { list-style: none; padding-left: 0; }
:is(.layout-figure[data-ly-focused], .path-figure[data-pt-focused]) .diagram-note { margin: 4px 16px 16px; padding: 14px 16px 4px; border: 1px solid var(--wave-grid); border-left: 3px solid var(--accent); border-radius: 0 6px 6px 0; background: var(--card); color: var(--ink); }
.layout-note, .path-note { color: var(--ink); background: var(--card); }
.layout-figure:not([data-ly-focused]) .layout-note, .path-figure:not([data-pt-focused]) .path-note { padding: 4px 20px 12px; }
@media (max-width: 520px) {
  :is(.layout-figure[data-ly-focused], .path-figure[data-pt-focused]) .diagram-note { margin-inline: 10px; padding-inline: 12px; }
  .ly-legend, .pt-legend { gap: 4px 12px; font-size: 12.5px; }
  .ly-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 3px 12px; font-size: 11.5px; }
  .ly-metrics div { flex-direction: column; gap: 0; }
  .ly-metrics-stage { grid-column: 1 / -1; flex-direction: row !important; gap: 7px !important; }
  .ly-legend, .pt-legend, .pt-summary, .ly-metrics-strip { padding-inline: 14px; }
  .layout-screen { margin-inline: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  .layout-figure[data-ly-playing] .ly-stage[data-ly-current] { animation: none; }
  .path-figure[data-pt-focused] .pt-seg { transition: none; }
}

/* ---------- Try it on a pd lesson (assets/v3/pd-example.mjs) ---------- */
.example [data-editor][hidden], .example [data-editor-netlist][hidden] { display: none; }
.pd-files { border-bottom: 0; }
.pd-knobs { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 10px 14px; border-top: var(--bw) solid var(--screen-rule); background: var(--screen-2); }
.pd-knob { display: inline-flex; align-items: center; gap: 8px; color: var(--screen-ink); font: 500 13px/1.3 var(--sans); }
.pd-knob input { width: 7em; min-height: 32px; padding: 2px 8px; border: 1px solid var(--screen-rule); border-radius: var(--r-chip); background: var(--screen); color: var(--screen-ink); font: 500 13px/1.3 var(--mono); }
.pd-knob input:focus-visible { outline: var(--focus-w) solid var(--focus); outline-offset: 1px; }
.pd-run { display: grid; gap: 12px; padding: 12px; border-top: var(--bw) solid var(--screen-rule); background: var(--screen-2); }
.pd-run[hidden] { display: none; }
.pd-run .diagram-figure { margin: 0; }
.pd-run .diagram-heading { padding: 12px 16px 10px; }
.pd-run .diagram-title { font-size: 18px; }
.pd-run-empty { margin: 0; color: var(--screen-muted); font: 13.5px/1.5 var(--sans); }
.output .out-line { padding: 0; border: 0; color: inherit; background: none; font: inherit; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }

/* Floating metal fill is a separate overlay; its measured rectangles are outlines. */
.ly-fill-shapes { fill: none; stroke-width: .7; stroke-opacity: .65; vector-effect: non-scaling-stroke; }
.ly-key-metal-fill { border: 1px solid var(--wave-muted); width: 12px; height: 9px; }
.ly-stage:has(.ly-metal-fill[data-ly-on]) .ly-cell { fill: var(--wave-muted); fill-opacity: .12; }