/* castomFLOW — canvas. Only what castomo-dashkit does not already draw.
 *
 * The workflow canvas (js/canvas.js), its list face (js/canvas-list.js) and
 * the "which step?" dialog (js/canvas-pick.js). Tokens only: every colour,
 * radius and step of spacing is the kit's, so dark and high contrast follow
 * the theme. A state is never told by shadow alone (§0.20): selected is an
 * accent edge and a wash, a refused drop a dashed bad edge, a run's path an
 * accent line with the rest faded.
 *
 * The card's size is --cv-w/--cv-h, set by canvas.js from the same numbers
 * its port arithmetic uses (no media query switches them, §0.35).
 */

.cv { display: flex; flex-direction: column; gap: var(--s1); min-inline-size: 0; block-size: 100%; }

/* ---------- toolbar ---------- */
.cv-tools { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s0); }
.cv-tools-add { display: flex; flex-wrap: wrap; gap: var(--s0); min-inline-size: 0; }
.cv-zoom-tools { display: flex; align-items: center; gap: var(--s-2); margin-inline-start: auto; }
.cv-zoom { min-inline-size: 5ch; text-align: center; font-size: var(--t-1); color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* ---------- the surface ---------- */
/* touch-action none: a finger on the canvas pans and pinches it, it never scrolls the page under it. */
.cv-surface {
  position: relative;
  flex: 1;
  min-block-size: 440px;
  overflow: hidden;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  cursor: grab;
  border: var(--rule-w) solid var(--rule);
  border-radius: var(--radius-control);
  background-color: var(--field);
  background-image: radial-gradient(circle at 1px 1px, var(--rule-strong) 1px, transparent 0);
  background-size: var(--s3) var(--s3);
}
.cv-surface:active { cursor: grabbing; }
/* A drawing is laid out left to right in every language (positions are the graph's x); the words on it still read in theirs. */
.cv-world { position: absolute; left: 0; top: 0; transform-origin: 0 0; direction: ltr; }
:root[dir="rtl"] .cv-node, :root[dir="rtl"] .cv-add { direction: rtl; }

/* ---------- links ---------- */
/* max-inline-size: none — the kit caps every svg at its parent's width (img, svg:not(.ci) — which outranks a single class), and .cv-world has none: the links would be painted into 0 px. */
.cv .cv-edges { position: absolute; left: 0; top: 0; inline-size: 1px; block-size: 1px; max-inline-size: none; overflow: visible; }
.cv-edge { fill: none; stroke: var(--ink-3); stroke-width: 2; }
.cv-edge-g[data-branch="yes"] .cv-edge { stroke: var(--ok); }
.cv-edge-g[data-branch="no"] .cv-edge { stroke: var(--ink-2); }
/* The error path is the one a person must never mistake for the normal route: dashed and in the bad tone. */
.cv-edge-g[data-branch="error"] .cv-edge { stroke: var(--bad); stroke-dasharray: 7 5; }
.cv-edge-g.is-selected .cv-edge { stroke: var(--accent-ink); stroke-width: 3.5; }
.cv-edge-hit { fill: none; stroke: transparent; stroke-width: 18; pointer-events: stroke; cursor: pointer; }
.cv.is-readonly .cv-edge-hit { pointer-events: none; cursor: default; }
.cv-edge-word {
  font-size: var(--t-2);
  font-weight: 650;
  fill: var(--ink-2);
  paint-order: stroke;
  stroke: var(--field);
  stroke-width: 4px;
  stroke-linejoin: round;
  pointer-events: none;
}
.cv-edge-g[data-branch="yes"] .cv-edge-word { fill: var(--ok); }
.cv-edge-g[data-branch="error"] .cv-edge-word { fill: var(--bad); }
.cv-ghost { stroke: var(--accent-ink); stroke-dasharray: 5 5; pointer-events: none; }
.cv-edge-tools { position: absolute; left: 0; top: 0; }
.cv-edge-del { position: absolute; left: 0; top: 0; background: var(--paper-2); color: var(--bad); border: var(--rule-w) solid var(--bad); }
@media (hover: hover) { .cv-edge-del:hover { background: var(--paper-2); color: var(--bad); border-width: 2px; } }

/* ---------- cards ---------- */
.cv-nodes { position: absolute; left: 0; top: 0; }
.cv-slot { position: absolute; left: 0; top: 0; inline-size: var(--cv-w); block-size: var(--cv-h); }
.cv-slot.is-dragging { z-index: 2; }
.cv-node {
  position: absolute;
  inset: 0;
  box-sizing: border-box;
  display: flex;
  align-items: flex-start;
  gap: var(--s1);
  padding: var(--s1);
  overflow: hidden;
  border: var(--rule-w) solid var(--rule-strong);
  border-radius: var(--radius-control);
  background: var(--paper-2);
  color: var(--ink-2);
  cursor: grab;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.cv.is-readonly .cv-node { cursor: pointer; }
@media (hover: hover) { .cv-node:hover { border-color: var(--ink-3); } }
.cv-node:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.cv-slot.is-dragging .cv-node { cursor: grabbing; box-shadow: var(--shadow-pop); }
.cv-slot.is-selected .cv-node { border-color: var(--accent-ink); border-width: 2px; background: var(--accent-wash); }
.cv-node[data-mark="blocker"] { border-color: var(--bad); }
.cv-node[data-mark="guess"] { border-color: var(--warn); }
/* A kind this workspace cannot run yet: dashed, with its "Unavailable" badge saying so in words. */
.cv-node[data-ready="no"] { border-style: dashed; }
.cv-node.is-target { border-color: var(--accent-ink); border-width: 2px; background: var(--accent-wash); }
.cv-node.is-refused { border-color: var(--bad); border-width: 2px; border-style: dashed; }

/* A run's path: its steps and links in the accent, the rest faded back. */
.cv.is-tracing .cv-slot[data-path="off"] { opacity: .4; }
.cv.is-tracing .cv-slot[data-path="on"] .cv-node { border-color: var(--accent-ink); border-width: 2px; }
.cv.is-tracing .cv-edge-g[data-path="off"] { opacity: .3; }
.cv.is-tracing .cv-edge-g[data-path="on"] .cv-edge { stroke: var(--accent-ink); stroke-width: 3.5; }

/* ---------- a step's face (card and list row) ---------- */
.cv-face-icon {
  --gc: var(--ink-3);
  flex: none;
  display: grid;
  place-items: center;
  inline-size: 40px;
  block-size: 40px;
  border-radius: var(--radius-sm);
  background: color-mix(in oklab, var(--gc) 16%, var(--paper-2));
  color: color-mix(in oklab, var(--gc) 55%, var(--ink));
}
.cv-face-icon .ci { --ci-size: 20px; }
/* One hue per group, from the kit's fixed distinguishable set (--game-*), so a group reads the same in every theme. */
[data-group="trigger"] { --gc: var(--game-1); }
[data-group="flow"] { --gc: var(--ink-3); }
[data-group="data"] { --gc: var(--game-5); }
[data-group="ai"] { --gc: var(--game-6); }
[data-group="send"] { --gc: var(--game-3); }
[data-group="app"] { --gc: var(--game-2); }
:root[data-theme^="contrast"] .cv-face-icon { background: transparent; color: var(--ink); outline: var(--rule-w) solid var(--ink); outline-offset: -1px; }
.cv-face-text { flex: 1; display: grid; gap: 2px; min-inline-size: 0; }
.cv-face-label { color: var(--ink); font-weight: 650; line-height: 1.25; }
.cv-face-kind { font-size: var(--t-1); color: var(--ink-3); line-height: 1.3; }
.cv-node :is(.cv-face-label, .cv-face-kind) { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cv-marks { display: flex; flex-wrap: wrap; gap: var(--s-1); min-inline-size: 0; margin-block-start: 2px; }
/* On a card the marks keep to one line: a card's size is fixed, and the list face shows every mark in full. */
.cv-node .cv-marks { flex-wrap: nowrap; overflow: hidden; }
.cv-mark { font-size: var(--t-2); padding-block: 0; padding-inline: var(--s0) var(--s0); }

/* ---------- ports and "+" ---------- */
.cv-port {
  position: absolute;
  inline-size: 14px;
  block-size: 14px;
  box-sizing: border-box;
  border: 2px solid var(--ink-3);
  border-radius: var(--radius-pill);
  background: var(--paper-2);
  transform: translate(-50%, -50%);
}
.cv-in { left: 50%; top: 0; pointer-events: none; }
.cv-out { left: var(--at); top: 100%; cursor: crosshair; touch-action: none; transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease); }
/* The dot is small to look at and large to hit: a mouse gets 34 px, a finger the kit's 44 px target. */
.cv-out::before { content: ""; position: absolute; inset: -10px; border-radius: var(--radius-pill); }
@media (pointer: coarse) { .cv-out::before { inset: -15px; } }
@media (hover: hover) { .cv-out:hover { background: var(--accent); border-color: var(--accent-ink); transform: translate(-50%, -50%) scale(1.3); } }
.cv-out[data-branch="yes"] { border-color: var(--ok); }
.cv-out[data-branch="no"] { border-color: var(--ink-2); }
/* The error port is square as well as red, so it is told apart without colour. */
.cv-out[data-branch="error"] { border-color: var(--bad); border-radius: 3px; }

.cv-add {
  position: absolute;
  left: var(--at);
  top: calc(100% + var(--s2));
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-1);
  min-inline-size: 28px;
  min-block-size: 28px;
  padding: 0;
  border: var(--rule-w) dashed var(--rule-strong);
  border-radius: var(--radius-pill);
  background: var(--paper-2);
  color: var(--ink-2);
  font: inherit;
  font-size: var(--t-2);
  font-weight: 650;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.cv-add.has-word { padding-inline: var(--s0) var(--s1); }
.cv-add .ci { --ci-size: 14px; }
.cv-add[data-branch="error"] { color: var(--bad); }
@media (hover: hover) { .cv-add:hover { border-style: solid; border-color: var(--accent-ink); color: var(--accent-ink); background: var(--accent-wash); } }
.cv-add:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
@media (pointer: coarse) { .cv-add { min-inline-size: 36px; min-block-size: 36px; } }

/* ---------- empty ---------- */
.cv-empty { display: grid; place-items: center; min-block-size: 360px; padding: var(--s3) var(--s2); border: var(--rule-w) dashed var(--rule-strong); border-radius: var(--radius-control); }
.cv-empty:empty { display: none; }

/* ---------- the list face ---------- */
.cv-list-box { min-inline-size: 0; }
.cv-list { display: grid; gap: var(--s2); min-inline-size: 0; }
.cv-list-start { display: grid; gap: var(--s0); justify-items: start; padding: var(--s1); border: var(--rule-w) dashed var(--rule-strong); border-radius: var(--radius-control); }
.cv-list-start p { color: var(--ink-2); }
.cv-list-start .btn { max-inline-size: 100%; white-space: normal; text-align: start; }
.cv-chain { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s1); min-inline-size: 0; }
/* A path's own steps: indented by a rule, not boxed (a box inside a card marks itself with a rule, §4d). */
.cv-sub { margin-block: var(--s-1) var(--s0); padding-inline-start: var(--s1); border-inline-start: 2px solid var(--rule-strong); }
.cv-li { display: grid; gap: var(--s0); min-inline-size: 0; }
.cv-li-step {
  display: flex;
  align-items: flex-start;
  gap: var(--s1);
  inline-size: 100%;
  min-block-size: var(--target);
  padding: var(--s1);
  border: var(--rule-w) solid var(--rule-strong);
  border-radius: var(--radius-control);
  background: var(--paper-2);
  color: var(--ink-2);
  font: inherit;
  text-align: start;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.cv-li-step .cv-face-label { overflow-wrap: anywhere; }
@media (hover: hover) { .cv-li-step:hover { border-color: var(--ink-3); } }
.cv-li-step:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.cv-li-step[aria-pressed="true"] { border-color: var(--accent-ink); border-width: 2px; background: var(--accent-wash); }
.cv-li[data-mark="blocker"] > .cv-li-step { border-color: var(--bad); }
.cv-li[data-mark="guess"] > .cv-li-step { border-color: var(--warn); }
.cv-li[data-path="off"] > .cv-li-step { opacity: .5; }
.cv-li[data-path="on"] > .cv-li-step { border-color: var(--accent-ink); border-width: 2px; }
.cv-outs { display: grid; gap: var(--s0); min-inline-size: 0; padding-inline-start: var(--s1); }
.cv-out-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-1) var(--s0); min-inline-size: 0; }
.cv-out-word { display: inline-flex; align-items: center; gap: var(--s-1); font-size: var(--t-1); font-weight: 650; color: var(--ink-2); overflow-wrap: anywhere; }
.cv-out-word .ci { --ci-size: 14px; }
.cv-out-row[data-branch="yes"] .cv-out-word { color: var(--ok); }
.cv-out-row[data-branch="error"] .cv-out-word { color: var(--bad); }
.cv-out-row[data-lit="yes"] .cv-out-word { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 3px; }
.cv-out-select { flex: 1 1 12rem; inline-size: auto; min-inline-size: 0; max-inline-size: 100%; }
.cv-out-target { color: var(--ink); min-inline-size: 0; overflow-wrap: anywhere; }
.cv-add-here { max-inline-size: 100%; white-space: normal; text-align: start; }
.cv-end { margin: 0; padding-inline-start: var(--s1); font-size: var(--t-1); color: var(--ink-3); }
.cv-loose { display: grid; gap: var(--s1); padding-block-start: var(--s2); border-block-start: var(--rule-w) solid var(--rule); }
.cv-loose-head { font-size: var(--t0); color: var(--ink); }
.cv-loose-lead { margin: 0; font-size: var(--t-1); color: var(--ink-3); }

/* ---------- the "which step?" dialog ---------- */
.cv-pick { inline-size: min(40rem, calc(100vw - var(--s4))); }
.cv-pick-art { background: var(--accent-wash); color: var(--accent-ink); }
.cv-pick-search { padding: var(--s0) var(--s3) 0; }
.cv-pick-search .input { inline-size: 100%; }
.cv-pick-body { gap: var(--s2); }
.cv-pick-groups { display: grid; gap: var(--s2); }
.cv-pick-group { display: grid; gap: var(--s0); }
.cv-pick-head { display: flex; align-items: center; gap: var(--s0); font-size: var(--t-1); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.cv-pick-head .ci { --ci-size: 16px; }
/* One column: a filtered list must never leave a hole in a grid (§0.19). */
.cv-pick-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s0); }
.cv-pick-item {
  display: flex;
  align-items: flex-start;
  gap: var(--s1);
  inline-size: 100%;
  min-block-size: var(--target);
  padding: var(--s0) var(--s1);
  border: var(--rule-w) solid var(--rule);
  border-radius: var(--radius-control);
  background: var(--paper);
  color: var(--ink-2);
  font: inherit;
  text-align: start;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
@media (hover: hover) { .cv-pick-item:hover { border-color: var(--accent-ink); background: var(--accent-wash); } }
.cv-pick-item:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-color: var(--accent-ink); }
.cv-pick-item[data-ready="no"] { border-style: dashed; }
.cv-pick-icon { --gc: var(--ink-3); flex: none; display: grid; place-items: center; inline-size: 36px; block-size: 36px; border-radius: var(--radius-sm); background: color-mix(in oklab, var(--gc) 16%, var(--paper-2)); color: color-mix(in oklab, var(--gc) 55%, var(--ink)); }
.cv-pick-icon .ci { --ci-size: 18px; }
:root[data-theme^="contrast"] .cv-pick-icon { background: transparent; color: var(--ink); outline: var(--rule-w) solid var(--ink); outline-offset: -1px; }
.cv-pick-text { display: grid; gap: 2px; min-inline-size: 0; }
.cv-pick-text b { color: var(--ink); font-weight: 650; }
.cv-pick-text small { font-size: var(--t-1); color: var(--ink-3); }
.cv-pick-text .badge { white-space: normal; }
.cv-pick-none { margin: 0; color: var(--ink-3); }

/* 640 px, the kit's drawer-to-sheet step: the picker becomes a full-screen sheet, the room a long list needs on a phone. */
@media (max-width: 640px) {
  .cv-pick { inline-size: 100vw; max-inline-size: 100vw; block-size: 100dvh; max-block-size: 100dvh; margin: 0; border-radius: 0; }
  .cv-pick .dialog-form { block-size: 100%; }
  .cv-pick .cv-pick-body { flex: 1; }
  .cv-pick-search { padding-inline: var(--s2); }
  .cv-pick .dialog-head, .cv-pick .dialog-body, .cv-pick .dialog-foot { padding-inline: var(--s2); }
  .cv-surface { min-block-size: 360px; }
}

/* 400 px, the kit's one-inset step: nested paths indent by less, so a third level still has room for its words. */
@media (max-width: 400px) {
  .cv-sub { padding-inline-start: var(--s0); }
  .cv-outs { padding-inline-start: 0; }
  .cv-empty { padding-inline: var(--s1); }
}