/* The live feed: rows that arrive, age, and say when the line is down.
 *
 * Mounted twice — the Realtime tab (hub-wide) and an agent's own page (both
 * directions, filtered). One stylesheet, because building it twice is how the two
 * drift apart.
 *
 * Two rules here are requirements rather than taste:
 *
 *   1. Colour is never the only cue. Every row carries `from` or `to` in words as
 *      well as a coloured rail, so direction reads without the hue. The pair is
 *      blue/amber rather than a ledger's red/green because it survives the common
 *      colour-vision deficiencies.
 *
 *   2. The head row shows what the relay published and never what the page guessed.
 *      A quiet hub and a dead connection are both silence; only the relay knows
 *      which is which.
 */

.feed {
  --in:  #2F6F9E;
  --out: #A8710F;
  --live: #3E7C39;
  --warn: #A8710F;
  --lost: #A33F2A;
  --band: color-mix(in srgb, currentColor 5%, transparent);
  --hair: color-mix(in srgb, currentColor 12%, transparent);
  --in-wash:  color-mix(in srgb, var(--in) 11%, transparent);
  --out-wash: color-mix(in srgb, var(--out) 12%, transparent);

  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  margin: 1rem 0;
}

@media (prefers-color-scheme: dark) {
  .feed {
    --in: #74B4E6;
    --out: #DFAA46;
    --live: #63B85A;
    --warn: #DFAA46;
    --lost: #E0725C;
    --in-wash:  color-mix(in srgb, var(--in) 14%, transparent);
    --out-wash: color-mix(in srgb, var(--out) 13%, transparent);
  }
}

/* ---- the head row: the line itself ---------------------------------- */

.feed-head {
  display: flex;
  align-items: center;
  gap: .55rem;
  flex-wrap: wrap;
  padding: .5rem .9rem;
  background: var(--band);
  border-bottom: 1px solid var(--line);
}

.feed-lamp {
  width: .45rem;
  height: .45rem;
  border-radius: 50%;
  flex: none;
  background: var(--live);
  animation: feed-breathe 2.8s ease-in-out infinite;
}

.feed-state {
  font: 500 .7rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: color-mix(in srgb, currentColor 65%, transparent);
}

/* Each state is a distinct, named look. `reconnecting` is not a quieter `open`
   and `lost` is not a quieter `reconnecting`: an operator must be able to tell
   them apart across a room, because that is when it matters. */
.feed[data-state="reconnecting"] .feed-lamp { background: var(--warn); }
.feed[data-state="reconnecting"] .feed-state { color: var(--warn); }
.feed[data-state="lost"] .feed-lamp { background: var(--lost); animation: none; }
.feed[data-state="lost"] .feed-state { color: var(--lost); }
.feed[data-state="lost"] .feed-head { background: color-mix(in srgb, var(--lost) 10%, transparent); }

.feed-clock {
  margin-left: auto;
  font: 500 .7rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: color-mix(in srgb, currentColor 45%, transparent);
  font-variant-numeric: tabular-nums;
}

@keyframes feed-breathe { 50% { opacity: .25; } }

/* ---- filter pills ---------------------------------------------------- */

.feed-pills { display: flex; gap: .3rem; }

.feed-pills button {
  font: 500 .72rem/1 inherit;
  padding: .34rem .6rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: transparent;
  color: color-mix(in srgb, currentColor 65%, transparent);
  cursor: pointer;
}

.feed-pills button[aria-pressed="true"] { color: inherit; border-color: currentColor; }
.feed-pills button.in[aria-pressed="true"] { color: var(--in); }
.feed-pills button.out[aria-pressed="true"] { color: var(--out); }
.feed-pills button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- rows ------------------------------------------------------------ */

.feed-rows { list-style: none; margin: 0; padding: 0; }

.feed-row {
  display: grid;
  grid-template-columns: 3px 1fr;
  gap: .75rem;
  padding: 0;
  border-bottom: 1px solid var(--hair);
}

.feed-row:last-child { border-bottom: 0; }

/* The rail. Direction at the row's edge, legible before a word is read — and
   never the only thing carrying it (see .feed-who). */
.feed-rail { background: color-mix(in srgb, currentColor 20%, transparent); }
.feed-row.in  .feed-rail { background: var(--in); }
.feed-row.out .feed-rail { background: var(--out); }

.feed-body { padding: .55rem .9rem .6rem 0; min-width: 0; }

/* Two lines, which is why long subjects stopped being truncated. */
.feed-meta {
  display: flex;
  gap: .5rem;
  align-items: baseline;
  font: 500 .72rem/1.3 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.feed-dir {
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .64rem;
  color: color-mix(in srgb, currentColor 50%, transparent);
}
.feed-row.in  .feed-dir { color: var(--in); }
.feed-row.out .feed-dir { color: var(--out); }

.feed-who { font-weight: 600; }

.feed-when {
  margin-left: auto;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, currentColor 45%, transparent);
  white-space: nowrap;
}

.feed-subject {
  margin: .15rem 0 0;
  font-size: .92rem;
  overflow-wrap: anywhere;
}

.feed-subject.none { color: color-mix(in srgb, currentColor 45%, transparent); font-style: italic; }

/* ---- arrival ---------------------------------------------------------- */

.feed-row.fresh { animation: feed-wash 2.4s ease-out; }
.feed-row.fresh.in  { animation-name: feed-wash-in; }
.feed-row.fresh.out { animation-name: feed-wash-out; }

@keyframes feed-wash-in {
  0%   { background: var(--in-wash);  transform: translateY(-.45rem); }
  16%  { transform: none; }
  100% { background: transparent; }
}
@keyframes feed-wash-out {
  0%   { background: var(--out-wash); transform: translateY(-.45rem); }
  16%  { transform: none; }
  100% { background: transparent; }
}
@keyframes feed-wash {
  0%   { background: var(--band); transform: translateY(-.45rem); }
  16%  { transform: none; }
  100% { background: transparent; }
}

/* A new row must still announce itself to somebody who cannot have motion. The
   weight is the console's existing vocabulary for "unread", so this borrows a
   meaning readers already have rather than inventing one. */
@media (prefers-reduced-motion: reduce) {
  .feed-row.fresh { animation: none; }
  .feed-row.fresh .feed-subject { font-weight: 600; }
  .feed-lamp { animation: none; }
}

.feed-empty {
  padding: 1.25rem .9rem;
  color: color-mix(in srgb, currentColor 55%, transparent);
  font-size: .9rem;
}