/* LinkUp Troubleshooting System */
.lu-trb {
  --trb-bg: #0a0d14;
  --trb-surf: rgba(20, 26, 40, 0.55);
  --trb-surf-2: rgba(28, 34, 50, 0.7);
  --trb-border: rgba(140, 160, 220, 0.12);
  --trb-border-strong: rgba(140, 160, 220, 0.22);
  --trb-text: #e6ebf5;
  --trb-mute: #8892a8;
  --trb-dim: #5b6480;
  --trb-acc: #4f7df5;
  --trb-acc-glow: #6b9bff;
  --trb-crit: #ff5b6e;
  --trb-warn: #ffb547;
  --trb-ok: #4ade80;
  --trb-info: #4f7df5;

  position: relative;
  padding: 96px 24px 120px;
  background: var(--trb-bg);
  color: var(--trb-text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  overflow: hidden;
  isolation: isolate;
}

/* BG */
.lu-trb__bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.lu-trb__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(140,160,220,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140,160,220,.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}
.lu-trb__orb {
  position: absolute; width: 540px; height: 540px; border-radius: 50%;
  filter: blur(120px); opacity: .35; transition: translate .8s ease-out;
}
.lu-trb__orb--a { top: -180px; left: -160px; background: radial-gradient(circle, rgba(255,91,110,.35), transparent 70%); }
.lu-trb__orb--b { bottom: -200px; right: -180px; background: radial-gradient(circle, rgba(79,125,245,.35), transparent 70%); }
.lu-trb__scan {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(79,125,245,.05) 50%, transparent 100%);
  background-size: 100% 6px;
  animation: lu-trb-scan 8s linear infinite;
  opacity: .4;
}
@keyframes lu-trb-scan { from { background-position: 0 0; } to { background-position: 0 200px; } }

.lu-trb__container { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; }

/* Reveal */
[data-lu-t-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
[data-lu-t-reveal].is-in { opacity: 1; transform: none; }

/* HEADER */
.lu-trb__header { margin-bottom: 40px; }
.lu-trb__label {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 14px; border: 1px solid var(--trb-border);
  border-radius: 999px; background: var(--trb-surf);
  font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--trb-mute); backdrop-filter: blur(10px);
}
.lu-trb__label-pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--trb-crit);
  box-shadow: 0 0 0 0 rgba(255,91,110,.6);
  animation: lu-trb-pulse 1.8s ease-out infinite;
}
@keyframes lu-trb-pulse { 70% { box-shadow: 0 0 0 10px rgba(255,91,110,0); } 100% { box-shadow: 0 0 0 0 rgba(255,91,110,0); } }
.lu-trb__label-divider { color: var(--trb-dim); }
.lu-trb__label-mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--trb-text); }

.lu-trb__title {
  margin: 18px 0 12px;
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 600; letter-spacing: -.02em; line-height: 1.05;
}
.lu-trb__title-accent {
  background: linear-gradient(135deg, var(--trb-acc), var(--trb-acc-glow));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lu-trb__sub { color: var(--trb-mute); max-width: 640px; line-height: 1.65; font-size: 15px; }
.lu-trb__sub b { color: var(--trb-text); font-weight: 500; }

/* TOOLBAR */
.lu-trb__toolbar {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-top: 28px; align-items: center;
}
.lu-trb__search {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; flex: 1; min-width: 240px;
  background: var(--trb-surf); border: 1px solid var(--trb-border);
  border-radius: 12px; transition: border-color .2s, background .2s;
}
.lu-trb__search:focus-within { border-color: var(--trb-border-strong); background: var(--trb-surf-2); }
.lu-trb__search svg { width: 16px; height: 16px; color: var(--trb-mute); flex-shrink: 0; }
.lu-trb__search input {
  flex: 1; background: transparent; border: 0; outline: 0;
  color: var(--trb-text); font-size: 14px; font-family: inherit;
}
.lu-trb__search input::placeholder { color: var(--trb-dim); }
.lu-trb__kbd {
  font-family: ui-monospace, monospace; font-size: 11px; color: var(--trb-mute);
  padding: 3px 7px; border: 1px solid var(--trb-border-strong); border-radius: 5px;
  background: rgba(0,0,0,.25);
}

.lu-trb__filters { display: flex; gap: 6px; flex-wrap: wrap; }
.lu-trb__filter {
  padding: 9px 14px; border-radius: 10px; cursor: pointer;
  background: var(--trb-surf); border: 1px solid var(--trb-border);
  color: var(--trb-mute); font-size: 12.5px; font-family: inherit;
  display: inline-flex; align-items: center; gap: 8px;
  transition: all .2s ease;
}
.lu-trb__filter i {
  font-style: normal; font-size: 10.5px; color: var(--trb-dim);
  font-family: ui-monospace, monospace;
}
.lu-trb__filter:hover { color: var(--trb-text); border-color: var(--trb-border-strong); }
.lu-trb__filter.is-on {
  background: linear-gradient(135deg, rgba(79,125,245,.2), rgba(107,155,255,.12));
  border-color: rgba(79,125,245,.45);
  color: var(--trb-text);
  box-shadow: 0 0 0 1px rgba(79,125,245,.25), 0 4px 16px rgba(79,125,245,.18);
}

/* METRICS */
.lu-trb__metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
  margin-top: 22px;
}
.lu-trb__metric {
  padding: 14px 16px; background: var(--trb-surf); border: 1px solid var(--trb-border);
  border-radius: 12px; display: flex; flex-direction: column; gap: 6px;
}
.lu-trb__metric-k {
  font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--trb-dim);
}
.lu-trb__metric-v { font-size: 22px; font-weight: 600; color: var(--trb-text); }
.lu-trb__metric-v--ok { color: var(--trb-ok); }
.lu-trb__metric-v--mono { font-family: ui-monospace, monospace; font-size: 14px; font-weight: 500; }

/* LIST */
.lu-trb__list { display: flex; flex-direction: column; gap: 14px; margin-top: 8px; }

/* ISSUE */
.lu-trb__issue {
  background: var(--trb-surf);
  border: 1px solid var(--trb-border);
  border-radius: 16px; overflow: hidden;
  transition: border-color .25s, background .25s, transform .25s;
}
.lu-trb__issue:hover { border-color: var(--trb-border-strong); background: var(--trb-surf-2); }
.lu-trb__issue.is-hidden { display: none; }
.lu-trb__issue.is-fixed { opacity: .55; }
.lu-trb__issue.is-fixed .lu-trb__issue-sev { background: rgba(74,222,128,.12); border-color: rgba(74,222,128,.35); color: var(--trb-ok); }
.lu-trb__issue.is-fixed .lu-trb__dot { background: var(--trb-ok); }

.lu-trb__issue-head {
  display: grid;
  grid-template-columns: auto auto 1fr auto auto;
  gap: 14px; align-items: center;
  padding: 18px 20px; cursor: pointer;
  position: relative;
}
.lu-trb__issue-head::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--trb-crit), transparent);
  opacity: 0; transition: opacity .25s;
}
.lu-trb__issue.is-open .lu-trb__issue-head::before { opacity: 1; }

.lu-trb__issue-id {
  font-family: ui-monospace, monospace; font-size: 11px;
  color: var(--trb-dim); padding: 4px 8px;
  border: 1px solid var(--trb-border); border-radius: 6px;
}
.lu-trb__issue-sev {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 5px 11px; border-radius: 999px;
  font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  border: 1px solid; transition: all .25s;
}
.lu-trb__issue-sev--crit { background: rgba(255,91,110,.1); border-color: rgba(255,91,110,.35); color: var(--trb-crit); }
.lu-trb__issue-sev--warn { background: rgba(255,181,71,.1); border-color: rgba(255,181,71,.35); color: var(--trb-warn); }
.lu-trb__issue-sev--info { background: rgba(79,125,245,.1); border-color: rgba(79,125,245,.35); color: var(--trb-info); }
.lu-trb__dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
  animation: lu-trb-blink 1.6s ease-in-out infinite;
}
@keyframes lu-trb-blink { 50% { opacity: .35; } }

.lu-trb__issue-title { font-size: 16px; font-weight: 500; margin: 0; color: var(--trb-text); }
.lu-trb__issue-meta {
  font-size: 12px; color: var(--trb-dim);
  display: flex; gap: 8px; align-items: center;
}
.lu-trb__sep { color: var(--trb-border-strong); }

.lu-trb__toggle {
  width: 32px; height: 32px; border-radius: 8px;
  background: rgba(0,0,0,.25); border: 1px solid var(--trb-border);
  color: var(--trb-mute); cursor: pointer;
  display: grid; place-items: center;
  transition: transform .3s, color .2s, background .2s;
}
.lu-trb__toggle svg { width: 14px; height: 14px; }
.lu-trb__toggle:hover { color: var(--trb-text); background: rgba(79,125,245,.15); }
.lu-trb__issue.is-open .lu-trb__toggle { transform: rotate(180deg); }

/* BODY */
.lu-trb__issue-body {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows .35s ease;
}
.lu-trb__issue.is-open .lu-trb__issue-body { grid-template-rows: 1fr; }
.lu-trb__issue-body > * {
  overflow: hidden;
  border-top: 1px solid var(--trb-border);
  padding: 0 20px;
}
.lu-trb__issue.is-open .lu-trb__issue-body > * { padding: 22px 20px 20px; }

/* FLOW */
.lu-trb__flow {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 18px; align-items: stretch;
}
.lu-trb__flow-col {
  background: rgba(0,0,0,.22);
  border: 1px solid var(--trb-border);
  border-radius: 12px; padding: 16px 18px;
}
.lu-trb__flow-col--cause { border-left: 2px solid var(--trb-warn); }
.lu-trb__flow-col--fix { border-left: 2px solid var(--trb-ok); }
.lu-trb__flow-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.lu-trb__flow-head h4 {
  margin: 0; font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--trb-mute); font-weight: 500;
}
.lu-trb__flow-icon {
  width: 26px; height: 26px; border-radius: 7px;
  display: grid; place-items: center; font-size: 13px;
  background: rgba(255,181,71,.12); color: var(--trb-warn);
  border: 1px solid rgba(255,181,71,.3);
}
.lu-trb__flow-icon--ok { background: rgba(74,222,128,.12); color: var(--trb-ok); border-color: rgba(74,222,128,.3); }
.lu-trb__flow-arrow {
  align-self: center; color: var(--trb-dim);
  display: grid; place-items: center;
}
.lu-trb__flow-arrow svg { width: 50px; height: 20px; }

.lu-trb__chk { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 9px; }
.lu-trb__chk li {
  display: flex; align-items: center; gap: 10px;
  font-size: 13.5px; color: var(--trb-text);
}
.lu-trb__chk i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--trb-warn); flex-shrink: 0;
  box-shadow: 0 0 8px rgba(255,181,71,.5);
}

.lu-trb__steps { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 9px; counter-reset: s; }
.lu-trb__steps li {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 12px; border-radius: 8px;
  background: rgba(74,222,128,.05);
  border: 1px solid rgba(74,222,128,.12);
  transition: background .2s, transform .2s;
}
.lu-trb__steps li:hover { background: rgba(74,222,128,.1); transform: translateX(3px); }
.lu-trb__steps b {
  font-family: ui-monospace, monospace; font-size: 11px;
  color: var(--trb-ok); font-weight: 500;
  padding: 3px 7px; border: 1px solid rgba(74,222,128,.3);
  border-radius: 5px;
}
.lu-trb__steps span { font-size: 13.5px; color: var(--trb-text); }

/* FOOT */
.lu-trb__issue-foot {
  display: flex; gap: 10px; align-items: center; margin-top: 18px; padding-top: 0 !important;
}
.lu-trb__action {
  padding: 9px 16px; border-radius: 9px; cursor: pointer;
  background: var(--trb-surf-2); border: 1px solid var(--trb-border-strong);
  color: var(--trb-text); font-size: 12.5px; font-family: inherit;
  transition: all .2s;
}
.lu-trb__action:hover { background: rgba(79,125,245,.12); border-color: rgba(79,125,245,.4); }
.lu-trb__action--primary {
  background: linear-gradient(135deg, var(--trb-acc), var(--trb-acc-glow));
  border-color: transparent; color: #fff;
  box-shadow: 0 6px 20px rgba(79,125,245,.35);
}
.lu-trb__action--primary:hover { box-shadow: 0 8px 26px rgba(79,125,245,.5); }
.lu-trb__action.is-running { pointer-events: none; opacity: .8; }
.lu-trb__action.is-done { background: linear-gradient(135deg, #4ade80, #22c55e); }
.lu-trb__issue-ts { margin-left: auto; font-size: 11.5px; color: var(--trb-dim); font-family: ui-monospace, monospace; }

/* EMPTY */
.lu-trb__empty {
  text-align: center; padding: 40px; color: var(--trb-mute);
  border: 1px dashed var(--trb-border); border-radius: 14px;
  background: var(--trb-surf);
}

/* FOOTER */
.lu-trb__footer {
  margin-top: 30px; padding: 18px 22px;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  background: var(--trb-surf); border: 1px solid var(--trb-border);
  border-radius: 14px; flex-wrap: wrap;
}
.lu-trb__foot-left { font-size: 12.5px; color: var(--trb-mute); display: inline-flex; align-items: center; gap: 10px; }
.lu-trb__foot-left b { color: var(--trb-text); font-weight: 500; }
.lu-trb__foot-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--trb-ok); box-shadow: 0 0 10px rgba(74,222,128,.6);
  animation: lu-trb-blink 2s ease-in-out infinite;
}
.lu-trb__rescan {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 10px; cursor: pointer;
  background: var(--trb-surf-2); border: 1px solid var(--trb-border-strong);
  color: var(--trb-text); font-size: 12.5px; font-family: inherit;
  transition: all .2s;
}
.lu-trb__rescan svg { width: 14px; height: 14px; transition: transform .6s; }
.lu-trb__rescan:hover { background: rgba(79,125,245,.12); border-color: rgba(79,125,245,.4); }
.lu-trb__rescan.is-spin svg { transform: rotate(360deg); }

/* RESPONSIVE */
@media (max-width: 860px) {
  .lu-trb { padding: 72px 18px 90px; }
  .lu-trb__metrics { grid-template-columns: repeat(2, 1fr); }
  .lu-trb__flow { grid-template-columns: 1fr; }
  .lu-trb__flow-arrow { transform: rotate(90deg); margin: -4px auto; }
  .lu-trb__issue-head {
    grid-template-columns: auto auto 1fr auto;
    grid-template-areas: "id sev title toggle" "meta meta meta meta";
    row-gap: 8px;
  }
  .lu-trb__issue-id { grid-area: id; }
  .lu-trb__issue-sev { grid-area: sev; }
  .lu-trb__issue-title { grid-area: title; font-size: 15px; }
  .lu-trb__toggle { grid-area: toggle; }
  .lu-trb__issue-meta { grid-area: meta; }
  .lu-trb__issue-foot { flex-wrap: wrap; }
  .lu-trb__issue-ts { margin-left: 0; width: 100%; }
}