/* Chapters ⑤–⑥ — "Control": workflow chain · automation toggles · email approval.
   Light world throughout. Motion language: mechanical precision — parts assemble,
   click into place, and then wait for a human. All markup is built by ch-control.js. */

/* ══════════════════════════════════════════════════════════════════
   ⑤a  Workflow chain — diagonal cascade of node cards + drawn arrows
   ══════════════════════════════════════════════════════════════════ */

#chain-stage {
  position: relative;
  margin-bottom: var(--sp-24);
}

.chain-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: var(--sp-6);
  row-gap: 46px;
  align-items: start;
}

.chain-card {
  position: relative;
  z-index: 1;
  background: var(--card-bg);
  border: 1px solid var(--card-line);
  border-radius: var(--radius-small);
  box-shadow: var(--shadow-card);
  padding: var(--sp-4);
  max-width: 270px;
  opacity: 0;
}
.chain-card.is-on {
  opacity: 1;
  animation: chain-click 420ms var(--ease-out) both;
}

/* The cascade: each node one column right and one row down from the last. */
.chain-card:nth-child(1) { grid-column: 1; grid-row: 1; }
.chain-card:nth-child(2) { grid-column: 2; grid-row: 2; }
.chain-card:nth-child(3) { grid-column: 3; grid-row: 3; }
.chain-card:nth-child(4) { grid-column: 4; grid-row: 4; }

/* Arrival "click": rise, 2px overshoot, settle. */
@keyframes chain-click {
  0%   { opacity: 0; transform: translateY(14px); }
  70%  { opacity: 1; transform: translateY(-2px); }
  100% { opacity: 1; transform: translateY(0); }
}

.chain-type {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--size-small);
  letter-spacing: 0.06em;
  margin-bottom: var(--sp-2);
}
.chain-type[data-tone="cyan"]   { color: var(--cyan-text); }
.chain-type[data-tone="orange"] { color: var(--accent-text); }

.chain-copy {
  margin: 0;
  max-width: none;
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--ink);
}

/* Connector layer — sits under the cards, geometry computed by JS. */
.chain-links {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  z-index: 0;
}
.chain-link path {
  fill: none;
  stroke: var(--orange);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke-dashoffset 420ms var(--ease-out);
}
.chain-link polygon {
  fill: var(--orange);
  opacity: 0;
  transition: opacity var(--t-fast) var(--ease-out) 280ms;
}
.chain-link.is-drawn polygon { opacity: 1; }

/* Chain stacks below the cascade's comfortable width. */
@media (max-width: 1000px) {
  .chain-grid {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 42px;
  }
  .chain-card {
    grid-column: 1 !important;
    grid-row: auto !important;
    max-width: 420px;
  }
}

/* ══════════════════════════════════════════════════════════════════
   ⑤b  Control row — toggle panel left, copy right
   ══════════════════════════════════════════════════════════════════ */

.control-row {
  display: grid;
  grid-template-columns: minmax(0, 55fr) minmax(0, 45fr);
  gap: var(--sp-12);
  align-items: center;
}
.control-copy h3 { margin-bottom: var(--sp-4); }

@media (max-width: 900px) {
  .control-row {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-8);
  }
}

/* Automations card */
.toggle-card {
  background: var(--card-bg);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-float);
  padding: var(--sp-6);
}
.toggle-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--size-h3);
  line-height: 1.2;
  margin: 0 0 var(--sp-4);
}
.toggle-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-2);
  border-top: 1px solid var(--line);
  transition: background-color var(--t-fast) var(--ease-out);
}
.toggle-row:first-child { border-top: 0; }
.toggle-row:hover { background: color-mix(in srgb, var(--ink) 4%, transparent); }

.toggle-label {
  font-weight: 500;
  line-height: 1.35;
  cursor: pointer;
}

/* The switch itself: 44×24 track, 18px knob. */
.switch {
  flex: none;
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  width: 44px;
  height: 24px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: color-mix(in srgb, var(--ink) 18%, transparent);
  transition: background-color var(--t-fast) var(--ease-out);
}
.switch[aria-checked="true"] { background: var(--orange); }
.switch:hover { background: color-mix(in srgb, var(--ink) 26%, transparent); }
.switch[aria-checked="true"]:hover { background: #F06F15; }
.switch:focus-visible {
  outline: 2px solid var(--accent-text);
  outline-offset: 3px;
}
.switch-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--card-bg);
  box-shadow: 0 1px 2px color-mix(in srgb, var(--ink) 32%, transparent);
  transition: transform var(--t-fast) var(--ease-out);
}
.switch[aria-checked="true"] .switch-knob { transform: translateX(20px); }

/* ══════════════════════════════════════════════════════════════════
   ⑥  Email approval — stepped panels with typed bodies
   ══════════════════════════════════════════════════════════════════ */

.ap-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-6);
}
.ap-panel {
  background: var(--card-bg);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: var(--sp-6);
  max-width: 46rem;
  opacity: 0.45;
  transition: opacity var(--t-move) var(--ease-out);
}
.ap-panel.is-on { opacity: 1; }
.ap-panel:nth-child(2) { margin-left: 2rem; }
.ap-panel:nth-child(3) { margin-left: 4rem; }
.ap-panel:nth-child(4) { margin-left: 6rem; }

.ap-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-3);
  margin-bottom: var(--sp-3);
}
.ap-tag {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
}
.ap-tag[data-tone="green"]  { color: var(--green-text); }
.ap-tag[data-tone="orange"] { color: var(--accent-text); }
.ap-tag[data-tone="cyan"]   { color: var(--cyan-text); }

.ap-meta {
  font-size: var(--size-small);
  color: var(--ink-mute);
}
.ap-chip {
  font-size: var(--size-small);
  font-weight: 500;
  line-height: 1.6;
  color: var(--accent-text);
  background: color-mix(in srgb, var(--orange) 13%, transparent);
  border-radius: 999px;
  padding: 0.1em 0.75em;
}
.ap-check {
  color: var(--green-text);
  flex: none;
  margin-left: calc(var(--sp-2) * -1);
}

/* Body: a hidden full-text ghost reserves the height so typing never reflows. */
.ap-body {
  position: relative;
  margin: 0;
  max-width: 60ch;
  color: var(--ink);
}
.ap-ghost { visibility: hidden; }
.ap-live  { position: absolute; inset: 0; }

.ap-caret {
  display: none;
  width: 1px;
  height: 1.05em;
  margin-left: 1px;
  background: var(--ink-mute);
  vertical-align: -0.18em;
}
.ap-panel.is-typing .ap-caret {
  display: inline-block;
  animation: ap-blink 900ms steps(1, end) infinite;
}
@keyframes ap-blink {
  0%, 49%   { opacity: 1; }
  50%, 100% { opacity: 0; }
}

@media (max-width: 900px) {
  .ap-panel { max-width: none; }
  .ap-panel:nth-child(2),
  .ap-panel:nth-child(3),
  .ap-panel:nth-child(4) { margin-left: 0; }
}

/* Reduced motion: nothing animates; the caret never appears (JS skips typing). */
@media (prefers-reduced-motion: reduce) {
  .chain-card { opacity: 1; animation: none; }
  .chain-link path,
  .chain-link polygon { transition: none; }
  .ap-panel { transition: none; }
  .ap-panel.is-typing .ap-caret { display: none; animation: none; }
}