/* ==========================================================================
   journey.css — education & experience timeline  (.journey*, .jnode*)
   Layout (desktop):  [ period ] [ node tile ] [ card ]   with a glowing rail
   through the tiles. Mobile: rail-left, period above each card.
   ========================================================================== */

.journey {
  --tile: 48px;
  --jgap: 16px;
  --pcol: 0px;
  --jpad: clamp(26px, 4vw, 42px);
  --rail-x: calc(var(--tile) / 2);
  --now: var(--accent-3-rgb); /* the current entry: amber in light, the soft accent in dark */
  position: relative;
  margin-bottom: calc(var(--section-pad) * -0.35); /* trim the dead gap before Recognition */
}

@media (max-width: 480px) {
  .journey {
    --tile: 44px; /* slimmer rail on phones: about 10px more line width */
    --jgap: 10px;
  }
}
@media (min-width: 720px) {
  .journey {
    --tile: 56px;
    --jgap: 22px;
  }
}
@media (min-width: 900px) {
  .journey {
    --pcol: 156px;
    --jgap: 24px;
    --rail-x: calc(var(--pcol) + var(--jgap) + var(--tile) / 2);
  }
}

/* ------------------------------------------------------------------ toolbar */
.journey__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-bottom: clamp(26px, 4vw, 42px);
}
.journey__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.journey__chip {
  min-height: 36px;
  padding-inline: 1.05em;
}
.journey__chip-ico {
  display: inline-flex;
}
.journey__chip-ico .icon {
  width: 14px;
  height: 14px;
}
.journey__readout {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 14px;
  margin: 0;
  color: var(--text-3);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}
.journey__range {
  color: var(--text-2);
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
}
@media (pointer: coarse) {
  .journey__chip {
    min-height: 44px;
  }
}
/* phones: one masked scroller row (same treatment as the publications toolbar) instead of two wrapped rows */
@media (max-width: 480px) {
  .journey__filters {
    flex-wrap: nowrap;
    flex: 1 1 100%;
    min-width: 0;
    overflow-x: auto;
    padding: 3px 32px 3px 3px; /* room for focus rings; the end padding keeps the last chip clear of the fade */
    margin: -3px;
    scrollbar-width: none;
    scroll-padding-inline: 8px 36px; /* the chosen / focused chip scrolls clear of the fade */
    -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 32px), transparent);
    mask-image: linear-gradient(90deg, #000 calc(100% - 32px), transparent);
  }
  .journey__filters::-webkit-scrollbar {
    display: none;
  }
  .journey__chip {
    flex: none;
  }
  .jnode__card {
    padding: 16px;
  }
}

/* -------------------------------------------------------------------- track */
.journey__track {
  position: relative;
  --p: 0;
  --rail-top: 0px;
  --rail-h: 0px;
}
.journey__list {
  display: flex;
  flex-direction: column;
}

/* rail: hairline track + glowing fill scaled by --p (0..1) */
.journey__rail {
  position: absolute;
  z-index: 0;
  left: calc(var(--rail-x) - 1px);
  top: var(--rail-top);
  width: 2px;
  height: var(--rail-h);
  border-radius: 2px;
  background: linear-gradient(var(--line-strong), var(--line-strong)) center / 1px 100% no-repeat;
  pointer-events: none;
}
.journey__rail-fill {
  position: absolute;
  inset: 0;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.65), 0 0 26px rgba(var(--accent-rgb), 0.3);
  transform-origin: 50% 0;
  transform: scaleY(var(--p));
  will-change: transform;
}
.journey__rail-head {
  position: absolute;
  left: 50%;
  top: 0;
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(var(--accent-rgb), 0.18), 0 0 18px 4px rgba(var(--accent-rgb), 0.65);
  opacity: 0;
  transform: translate3d(0, calc(var(--rail-h) * var(--p)), 0);
  transition: opacity var(--dur-2);
  will-change: transform;
}
.journey__track.is-started .journey__rail-head {
  opacity: 1;
}

/* ------------------------------------------------------------------- items */
.jnode {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--tile) minmax(0, 1fr);
  grid-template-areas:
    "node period"
    "node card";
  column-gap: var(--jgap);
  row-gap: 10px;
  padding-bottom: var(--jpad);
}
.jnode:last-child {
  padding-bottom: 0;
}
.jnode.is-enter {
  animation: jnode-enter 0.6s var(--ease-out) both;
  animation-delay: calc(var(--i, 0) * 60ms);
}
@keyframes jnode-enter {
  from {
    opacity: 0;
    transform: translate3d(0, 14px, 0);
  }
}

/* period */
.jnode__period {
  grid-area: period;
  display: flex;
  align-items: center;
  min-height: var(--tile);
  margin: 0;
  color: var(--text-2);
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.jnode.is-current .jnode__period {
  color: rgb(var(--now));
}

/* node tile */
.jnode__node {
  position: relative;
  z-index: 1;
  grid-area: node;
  align-self: start;
  display: grid;
  place-items: center;
  width: var(--tile);
  height: var(--tile);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: var(--bg-elev);
  color: var(--text-3);
  transition: color var(--dur-3) var(--ease), border-color var(--dur-3) var(--ease), box-shadow var(--dur-3) var(--ease),
    background var(--dur-3) var(--ease);
}
.jnode__mono {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  line-height: 1;
}
.jnode__mono[data-len="1"] {
  font-size: 1.4rem;
}
.jnode__mono[data-len="2"] {
  font-size: 1.05rem;
}
.jnode__mono[data-len="4"] {
  font-size: var(--fs-micro);
  letter-spacing: 0;
}
:root[data-lang="zh"] .jnode__note {
  text-wrap: pretty;
}
.jnode__kind {
  position: absolute;
  right: -7px;
  bottom: -7px;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--bg-elev);
  color: var(--text-3);
  transition: color var(--dur-3) var(--ease), border-color var(--dur-3) var(--ease);
}
.jnode__kind .icon {
  width: 12px;
  height: 12px;
}
.jnode__tie {
  display: none;
}

/* lit by the progress line */
.jnode.is-lit .jnode__node {
  color: var(--accent);
  border-color: var(--line-accent);
  background: linear-gradient(rgba(var(--accent-rgb), 0.12), rgba(var(--accent-rgb), 0.02)), var(--bg-elev);
  box-shadow: var(--glow-sm);
}
.jnode.is-lit .jnode__kind {
  color: var(--accent);
  border-color: var(--line-accent);
}

/* "now" node: amber and pulsing in light, the soft accent and still in dark (calm-dark block below) */
.jnode.is-current .jnode__node,
.jnode.is-current.is-lit .jnode__node {
  color: rgb(var(--now));
  border-color: rgba(var(--now), 0.62);
  background: linear-gradient(rgba(var(--now), 0.16), rgba(var(--now), 0.03)), var(--bg-elev);
  box-shadow: 0 0 0 1px rgba(var(--now), 0.22), 0 0 34px rgba(var(--now), 0.34);
}
.jnode.is-current .jnode__kind {
  color: rgb(var(--now));
  border-color: rgba(var(--now), 0.55);
}
.jnode.is-current .jnode__node::after {
  content: "";
  position: absolute;
  inset: -6px;
  border: 1px solid rgb(var(--now));
  border-radius: calc(var(--r-md) + 6px);
  opacity: 0;
  animation: jnode-ping 2.6s var(--ease-out) infinite;
}
@keyframes jnode-ping {
  0% {
    transform: scale(0.86);
    opacity: 0.85;
  }
  100% {
    transform: scale(1.22);
    opacity: 0;
  }
}
.journey__track.is-settling .jnode__node,
.journey__track.is-settling .jnode__kind,
.journey__track.is-settling .jnode__tie {
  transition: none;
}

/* ------------------------------------------------------------------- card */
.jnode__card {
  grid-area: card;
  min-width: 0;
  padding: clamp(18px, 2.4vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.jnode.is-current .jnode__card {
  border-color: rgba(var(--now), 0.4);
  box-shadow: 0 0 0 1px rgba(var(--now), 0.1), 0 0 56px -14px rgba(var(--now), 0.34);
  background:
    radial-gradient(520px circle at 0% 0%, rgba(var(--now), 0.08), transparent 62%),
    var(--panel);
}
@media (hover: hover) and (pointer: fine) {
  .jnode.is-current .jnode__card:hover {
    border-color: rgba(var(--now), 0.6);
  }
}
.jnode.is-current .jnode__card.ticks::after {
  background:
    linear-gradient(rgb(var(--now)), rgb(var(--now))) top left / 11px 1px no-repeat,
    linear-gradient(rgb(var(--now)), rgb(var(--now))) top left / 1px 11px no-repeat,
    linear-gradient(rgb(var(--now)), rgb(var(--now))) top right / 11px 1px no-repeat,
    linear-gradient(rgb(var(--now)), rgb(var(--now))) top right / 1px 11px no-repeat,
    linear-gradient(rgb(var(--now)), rgb(var(--now))) bottom left / 11px 1px no-repeat,
    linear-gradient(rgb(var(--now)), rgb(var(--now))) bottom left / 1px 11px no-repeat,
    linear-gradient(rgb(var(--now)), rgb(var(--now))) bottom right / 11px 1px no-repeat,
    linear-gradient(rgb(var(--now)), rgb(var(--now))) bottom right / 1px 11px no-repeat;
}

.jnode__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 22px;
}
.jnode__kindlabel {
  margin: 0;
}
.jnode__now {
  gap: 0.6em;
}
.jnode__now-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-3);
}
:root[data-theme="light"] .jnode__now-dot {
  box-shadow: 0 0 8px rgb(var(--accent-3-rgb));
}

.jnode__main {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.jnode__org {
  font-size: var(--fs-xl);
  font-weight: 600;
  line-height: var(--lh-snug);
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.jnode__role {
  text-wrap: balance; /* no orphan word on the second line ('Ph.D. in Computer / Science') */
}
.jnode__seg {
  white-space: nowrap;
}
.jnode__orglink {
  display: inline;
  color: inherit;
  transition: color var(--dur-2) var(--ease);
}
.jnode__ext {
  display: inline-flex;
  vertical-align: -0.12em;
  margin-left: 0.35em;
  color: var(--text-3);
  transition: transform var(--dur-3) var(--ease-out), color var(--dur-2);
}
.jnode__ext .icon {
  width: 0.72em;
  height: 0.72em;
}
.jnode__orglink:focus-visible {
  color: var(--accent);
}
.jnode__orglink:focus-visible .jnode__ext {
  color: var(--accent);
  transform: translate(2px, -2px);
}
@media (hover: hover) and (pointer: fine) {
  .jnode__orglink:hover {
    color: var(--accent);
  }
  .jnode__orglink:hover .jnode__ext {
    color: var(--accent);
    transform: translate(2px, -2px);
  }
}
.jnode__role {
  margin: 0;
  color: var(--text);
  font-size: var(--fs-md);
  font-weight: 500;
}
.jnode__place {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin: 2px 0 0;
  color: var(--text-3);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.jnode__place .icon {
  width: 14px;
  height: 14px;
}
.jnode__note {
  min-width: 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: var(--lh-body);
}
.jnode__note p {
  margin: 0;
  max-width: 64ch;
}
.jnode__note strong {
  color: var(--text);
  font-weight: 600;
}

/* touch: the org link is a 44px-tall hit area (inline padding grows the hit box, not the line) */
@media (pointer: coarse) {
  .jnode__orglink {
    padding-block: 9px;
    margin-block: -9px;
  }
}

/* --------------------------------------------------------------- desktop */
@media (min-width: 900px) {
  .jnode {
    grid-template-columns: var(--pcol) var(--tile) minmax(0, 1fr);
    grid-template-areas: "period node card";
    row-gap: 0;
  }
  .jnode__period {
    justify-content: flex-end;
    align-self: start;
    font-size: var(--fs-sm);
  }
  /* short connector from the tile to the card, lights up with the rail */
  .jnode__tie {
    display: block;
    position: absolute;
    z-index: 0;
    left: calc(var(--pcol) + var(--jgap) + var(--tile));
    top: calc(var(--tile) / 2);
    width: var(--jgap);
    height: 1px;
    background: var(--line-strong);
    transition: background var(--dur-3) var(--ease), box-shadow var(--dur-3) var(--ease);
  }
  .jnode.is-lit .jnode__tie {
    background: linear-gradient(90deg, rgba(var(--accent-rgb), 0.9), rgba(var(--accent-rgb), 0.25));
    box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.5);
  }
  .jnode.is-current .jnode__tie {
    background: linear-gradient(90deg, rgba(var(--now), 0.9), rgba(var(--now), 0.3));
    box-shadow: 0 0 8px rgba(var(--now), 0.5);
  }
}
@media (min-width: 1040px) {
  .jnode__card.has-note {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
    grid-template-areas:
      "top top"
      "main note";
    column-gap: 0;
    row-gap: 14px;
  }
  .jnode__card.has-note .jnode__top {
    grid-area: top;
  }
  .jnode__card.has-note .jnode__main {
    grid-area: main;
    padding-right: 28px;
  }
  .jnode__card.has-note .jnode__note {
    grid-area: note;
    align-self: start;
    padding-left: 28px;
    border-left: 1px solid var(--line);
  }
}

/* hover polish only where hover exists */
@media (hover: hover) and (pointer: fine) {
  .jnode:hover .jnode__node {
    border-color: var(--line-accent);
    color: var(--accent);
  }
  .jnode.is-current:hover .jnode__node {
    border-color: rgb(var(--now));
    color: rgb(var(--now));
  }
}

/* ----------------------------------------------------- reduced motion */
@media (prefers-reduced-motion: reduce) {
  .journey__track {
    --p: 1;
  }
  .journey__rail-head {
    opacity: 1;
  }
  .jnode.is-current .jnode__node::after {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Calm dark: neutral rail and nodes, no glows; the current node alone takes the accent
   -------------------------------------------------------------------------- */
:root:not([data-theme="light"]) .journey {
  --now: var(--accent-rgb);
}
:root:not([data-theme="light"]) .journey__rail-fill {
  background: var(--text-3);
  box-shadow: none;
}
:root:not([data-theme="light"]) .journey__rail-head {
  background: var(--text-2);
  box-shadow: 0 0 0 4px var(--line);
}
:root:not([data-theme="light"]) .jnode.is-lit .jnode__node {
  border-color: var(--text-3);
  background: var(--bg-elev);
  color: var(--text);
  box-shadow: none;
}
:root:not([data-theme="light"]) .jnode.is-lit .jnode__kind {
  border-color: var(--text-3);
  color: var(--text-2);
}
:root:not([data-theme="light"]) .jnode.is-current .jnode__node,
:root:not([data-theme="light"]) .jnode.is-current.is-lit .jnode__node {
  border-color: rgba(var(--now), 0.6);
  background: linear-gradient(rgba(var(--now), 0.12), rgba(var(--now), 0.03)), var(--bg-elev);
  box-shadow: none;
}
:root:not([data-theme="light"]) .jnode.is-current .jnode__node::after {
  display: none;
}
:root:not([data-theme="light"]) .jnode.is-current .jnode__card {
  border-color: var(--line-strong);
  box-shadow: none;
  background: var(--panel);
}
@media (hover: hover) and (pointer: fine) {
  :root:not([data-theme="light"]) .jnode.is-current .jnode__card:hover {
    border-color: var(--line-strong);
  }
  :root:not([data-theme="light"]) .jnode:hover .jnode__node {
    border-color: var(--text-3);
    color: var(--text);
  }
  :root:not([data-theme="light"]) .jnode.is-current:hover .jnode__node {
    border-color: rgb(var(--now));
    color: rgb(var(--now));
  }
}
@media (min-width: 900px) {
  :root:not([data-theme="light"]) .jnode.is-lit .jnode__tie {
    background: var(--text-3);
    box-shadow: none;
  }
  :root:not([data-theme="light"]) .jnode.is-current .jnode__tie {
    background: rgba(var(--now), 0.6);
    box-shadow: none;
  }
}