/* =============================================================
   ZARAS — Operating rail v1
   The §03 centerpiece visual: a full-bleed horizontal rail showing
   the operating record path (Intake → Estimate → Schedule →
   Field work → Invoice → Collect). Hover/focus previews a phase;
   click/tap pins. Mobile collapses to a vertical stepped accordion
   where only the active step expands.

   Token contract — consumed from host page :root, must exist:
     --bg, --bg-sub, --bg-raise
     --ink, --ink-sub, --ink-mute, --ink-faint
     --rule, --rule-hi
     --signal, --signal-ink, --signal-weak, --signal-rule
     --mono, --sans
     --gutter, --content-w

   Module-local tokens (scoped under .op-rail):
     --op-rail-spine-y   vertical position of upper spine line
     --op-rail-spine-gap distance between upper and lower spine lines
   ============================================================= */

.op-rail {
  --op-rail-spine-y: 78px;
  --op-rail-spine-gap: 4px;

  position: relative;
  font-family: var(--sans);
}

/* -------------------------------------------------------------
   FULL-BLEED WRAPPER
   Escapes the content-column constraint of .block-body so the
   rail can span the viewport. Uses calc(50% - 50vw) — the
   established pattern for full-bleed inside a centered column.
   ------------------------------------------------------------- */
.op-rail-bleed {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  padding: 56px 0 40px;
  position: relative;
}

/* -------------------------------------------------------------
   RAIL — the spine, the pulse, and the track of nodes
   ------------------------------------------------------------- */
.op-rail-rail {
  position: relative;
  padding: 0 max(var(--gutter), calc(50vw - var(--content-w) / 2));
  min-height: 160px;
}

/* Upper hairline — slightly stronger, structural */
.op-rail-rail::before {
  content: "";
  position: absolute;
  left: 0; right: 0;
  top: var(--op-rail-spine-y);
  height: 1px;
  background:
    linear-gradient(to right,
      var(--bg) 0%,
      var(--rule-hi) 6%,
      var(--rule-hi) 94%,
      var(--bg) 100%);
  z-index: 1;
}

/* Lower hairline — deferential, gives the spine a "track" feel */
.op-rail-rail::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  top: calc(var(--op-rail-spine-y) + var(--op-rail-spine-gap));
  height: 1px;
  background:
    linear-gradient(to right,
      var(--bg) 0%,
      var(--rule) 6%,
      var(--rule) 94%,
      var(--bg) 100%);
  z-index: 1;
}

/* -------------------------------------------------------------
   TRAVELING PULSE
   Single subtle gradient bump sweeps left → right on the upper
   rule every 14s. Peak opacity 0.32 (down from mockup 0.42).
   Reduced-motion disables entirely. Hidden on mobile.
   ------------------------------------------------------------- */
.op-rail-spine-pulse {
  position: absolute;
  left: 0; right: 0;
  top: calc(var(--op-rail-spine-y) - 1px);
  height: 3px;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}
.op-rail-spine-pulse::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 0;
  height: 1px;
  width: 180px;
  background: linear-gradient(to right,
    transparent 0%,
    rgba(118, 199, 178, 0.04) 30%,
    rgba(118, 199, 178, 0.16) 65%,
    rgba(118, 199, 178, 0.32) 88%,
    rgba(118, 199, 178, 0.06) 96%,
    transparent 100%);
  animation: op-rail-spine-pass 14s linear infinite;
  animation-delay: 1.2s;
  will-change: transform;
}
@keyframes op-rail-spine-pass {
  0%   { transform: translateX(-180px); }
  100% { transform: translateX(calc(100vw + 180px)); }
}

/* -------------------------------------------------------------
   TRACK — flex row of node wrappers on desktop
   ------------------------------------------------------------- */
.op-rail-track {
  position: relative;
  display: flex;
  align-items: flex-start;
  list-style: none;
  padding: 0;
  margin: 0;
}

.op-rail-node-wrap {
  flex: 1;
  position: static;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

/* -------------------------------------------------------------
   NODE — the actual tab button
   ------------------------------------------------------------- */
.op-rail-node {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  font: inherit;
  color: inherit;
  text-align: center;
  display: grid;
  grid-template-areas:
    "index"
    "name"
    "mark";
  grid-template-rows: auto auto auto;
  justify-items: center;
  row-gap: 0;
  position: relative;
  z-index: 2;
}
.op-rail-node:focus { outline: none; }
.op-rail-node:focus-visible .op-rail-node-mark {
  /* keyboard focus ring */
  outline: 2px solid var(--signal);
  outline-offset: 4px;
  border-radius: 50%;
}

.op-rail-node-index {
  grid-area: index;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 6px;
  transition: color .2s ease;
}

.op-rail-node-name {
  grid-area: name;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 1.02rem;
  color: var(--ink-sub);
  letter-spacing: -0.005em;
  margin-bottom: 36px;
  transition: color .2s ease;
}

.op-rail-node-mark {
  grid-area: mark;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--rule-hi);
  box-shadow: 0 0 0 5px var(--bg);
  position: relative;
  z-index: 2;
  transition: all .22s ease;
}

/* Chevron — mobile only. CSS-drawn 1px square rotated 45°. */
.op-rail-node-chev {
  display: none;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--ink-faint);
  border-right: 1px solid var(--ink-faint);
  transform: rotate(45deg);
  transition: transform .22s ease, border-color .22s ease;
}

/* -------------------------------------------------------------
   HOVER / FOCUS state on a non-active node
   Restrained: phase name brightens, index switches to signal,
   node border picks up signal-rule with faint halo. No scale,
   no glow trickery.
   ------------------------------------------------------------- */
.op-rail-node:hover .op-rail-node-name,
.op-rail-node:focus-visible .op-rail-node-name {
  color: var(--ink);
}
.op-rail-node:hover .op-rail-node-index,
.op-rail-node:focus-visible .op-rail-node-index {
  color: var(--signal);
}
.op-rail-node:hover .op-rail-node-mark,
.op-rail-node:focus-visible .op-rail-node-mark {
  border-color: var(--signal-rule);
  box-shadow:
    0 0 0 5px var(--bg),
    0 0 0 9px var(--signal-weak);
}

/* -------------------------------------------------------------
   ACTIVE state — driven by aria-selected="true" on the button.
   The wrapper also carries data-active="true" so descendants
   (chevron, panel) can style off it without traversing up.
   ------------------------------------------------------------- */
.op-rail-node[aria-selected="true"] .op-rail-node-name {
  color: var(--ink);
}
.op-rail-node[aria-selected="true"] .op-rail-node-index {
  color: var(--signal);
}
.op-rail-node[aria-selected="true"] .op-rail-node-mark {
  width: 14px;
  height: 14px;
  background: var(--signal);
  border-color: var(--signal);
  box-shadow:
    0 0 0 4px var(--bg),
    0 0 0 5px var(--signal-rule),
    0 0 0 12px var(--signal-weak);
}

/* Connector from active node down to the panel — desktop only.
   Hangs from the node-mark bottom edge down to the card top. */
.op-rail-node[aria-selected="true"]::after {
  content: "";
  position: absolute;
  top: calc(var(--op-rail-spine-y) + 14px + 4px);
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom,
    var(--signal-rule) 0%,
    var(--signal-rule) 30%,
    rgba(118, 199, 178, 0.08) 100%);
}

/* -------------------------------------------------------------
   PANELS — one per phase, only the active is visible.
   Desktop: positioned absolutely below the track, centered.
   Mobile: inline below the node (accordion).
   ------------------------------------------------------------- */
.op-rail-panel {
  position: absolute;
  top: calc(var(--op-rail-spine-y) + 14px + 56px + 16px);
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 2 * var(--gutter));
  max-width: 920px;
  padding: 0;
}
.op-rail-panel[hidden] { display: none; }

/* Reserve vertical space below the track so the absolutely-
   positioned active panel doesn't overlap subsequent content. */
.op-rail-rail::before,
.op-rail-rail::after { z-index: 0; }
.op-rail-rail {
  padding-bottom: 380px;
}

/* Panel anchor row — sits above the card, identifies the phase */
.op-rail-card-anchor {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}
.op-rail-card-anchor__index {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
}
.op-rail-card-anchor__phase {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.op-rail-card-anchor__rule {
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* The card */
.op-rail-card {
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--bg-raise);
  padding: 40px 44px;
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  gap: 40px;
  position: relative;
}
/* Top-edge teal accent — anchors card to active node visually */
.op-rail-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 1px;
  background: var(--signal-rule);
}

.op-rail-card-divider { background: var(--rule); }

.op-rail-card-col {
  display: flex;
  flex-direction: column;
}
.op-rail-card-eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.op-rail-card-col--pain .op-rail-card-eyebrow { color: var(--ink-mute); }
.op-rail-card-col--pain .op-rail-card-eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--ink-mute);
}
.op-rail-card-col--zaras .op-rail-card-eyebrow { color: var(--signal); }
.op-rail-card-col--zaras .op-rail-card-eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--signal);
}

.op-rail-card-body {
  color: var(--ink-sub);
  font-size: 0.98rem;
  line-height: 1.6;
  max-width: 38ch;
}

/* Placeholder skeleton — used until real copy lands.
   Once copy is written, replace .op-rail-card-placeholder content
   with real <p class="op-rail-card-body">…</p> blocks. */
.op-rail-card-placeholder {
  display: block;
}
.op-rail-card-placeholder span {
  display: block;
  height: 12px;
  border-radius: 2px;
  background: var(--rule);
  margin-bottom: 10px;
}
.op-rail-card-placeholder span:nth-child(1) { width: 96%; }
.op-rail-card-placeholder span:nth-child(2) { width: 88%; }
.op-rail-card-placeholder span:nth-child(3) { width: 64%; margin-bottom: 0; }
.op-rail-card-col--zaras .op-rail-card-placeholder span {
  background: rgba(118,199,178,0.10);
}

.op-rail-card-todo {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

/* =============================================================
   MOBILE — vertical stepped accordion
   At ≤720px the rail flips orientation: vertical spine on the
   left, each node becomes a row, the active node's panel renders
   inline below its row. Inactive nodes are collapsed to a single
   line with a chevron affordance.
   ============================================================= */
@media (max-width: 720px) {
  .op-rail-bleed { padding: 40px 0 28px; }

  .op-rail-rail {
    padding: 0 20px;
    min-height: auto;
    padding-bottom: 0;
  }

  /* Spine lines become vertical, sit on the left edge */
  .op-rail-rail::before,
  .op-rail-rail::after {
    top: 14px;
    bottom: 14px;
    height: auto;
    width: 1px;
    background:
      linear-gradient(to bottom,
        var(--bg) 0%,
        var(--rule) 6%,
        var(--rule) 94%,
        var(--bg) 100%);
    left: 26px;
    right: auto;
  }
  .op-rail-rail::before {
    left: 26px;
    background:
      linear-gradient(to bottom,
        var(--bg) 0%,
        var(--rule-hi) 6%,
        var(--rule-hi) 94%,
        var(--bg) 100%);
  }
  .op-rail-rail::after {
    left: 29px;
  }

  /* No traveling pulse on mobile — keep it calm */
  .op-rail-spine-pulse { display: none; }

  /* Track stacks vertically */
  .op-rail-track {
    flex-direction: column;
    align-items: stretch;
  }
  .op-rail-node-wrap {
    flex: none;
    border-bottom: 1px solid var(--rule);
    padding-left: 36px;
    position: relative;
  }
  .op-rail-node-wrap:last-child { border-bottom: none; }

  /* Node becomes a horizontal row */
  .op-rail-node {
    width: 100%;
    grid-template-areas: "mark index name chev";
    grid-template-columns: auto auto 1fr auto;
    grid-template-rows: auto;
    align-items: center;
    justify-items: start;
    column-gap: 12px;
    row-gap: 0;
    padding: 18px 0;
    text-align: left;
  }
  .op-rail-node-mark {
    grid-area: mark;
    margin-left: -38px;
  }
  .op-rail-node-index {
    grid-area: index;
    margin: 0;
    font-size: 0.62rem;
  }
  .op-rail-node-name {
    grid-area: name;
    margin: 0;
    font-size: 1.02rem;
  }
  .op-rail-node-chev {
    grid-area: chev;
    display: inline-block;
    margin-right: 4px;
  }
  .op-rail-node[aria-selected="true"] .op-rail-node-chev {
    transform: rotate(135deg);
    border-color: var(--signal);
  }

  /* Kill the desktop drop-connector */
  .op-rail-node[aria-selected="true"]::after { display: none; }

  /* Active node mark stays the same architectural treatment but
     positioned for mobile row layout */
  .op-rail-node[aria-selected="true"] .op-rail-node-mark {
    margin-left: -40px;
  }

  /* Panels go inline below their node */
  .op-rail-panel {
    position: static;
    transform: none;
    width: 100%;
    max-width: none;
    padding: 0 0 24px 0;
  }

  .op-rail-card-anchor { margin-bottom: 14px; }
  .op-rail-card-anchor__phase { font-size: 1.1rem; }

  .op-rail-card {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 22px 20px;
    border-radius: 6px;
  }
  .op-rail-card-divider {
    height: 1px;
    width: 100%;
    background: var(--rule);
  }
  .op-rail-card::before { width: 40px; }
}

/* =============================================================
   REDUCED MOTION
   Disables the traveling pulse entirely and all transitions.
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .op-rail-spine-pulse,
  .op-rail-spine-pulse::after { display: none; animation: none; }
  .op-rail-node-name,
  .op-rail-node-index,
  .op-rail-node-mark,
  .op-rail-node-chev { transition: none; }
}

/* =============================================================
   PRINT
   Show all panels, no animations, plain layout.
   ============================================================= */
@media print {
  .op-rail-spine-pulse { display: none; }
  .op-rail-panel[hidden] { display: block !important; }
  .op-rail-panel { position: static; transform: none; }
  .op-rail-rail { padding-bottom: 0; }
}