:root {
  --ink: #10151b;
  --panel: #1a222c;
  --panel-raised: #202a35;
  --line: #2a3542;
  --mist: #8a97a8;
  --paper: #eef2f5;
  --signal: #2fb6d9;
  --signal-dim: #1d7f95;
  --go: #3fbe72;
  --flag: #e8a33d;
  --alert: #e2584f;

  --font-display: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--signal); }
button { font-family: var(--font-body); }
::selection { background: var(--signal-dim); color: var(--paper); }

/* ---------------------------------------------------------------- layout */

.app-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

.nav-rail {
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 22px;
  color: var(--paper);
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 4px 6px 24px;
}
.brand small {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--signal);
  font-weight: 400;
  letter-spacing: 0.08em;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--mist);
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: background 0.12s ease, color 0.12s ease;
}
.nav-item:hover { background: var(--panel-raised); color: var(--paper); }
.nav-item.active {
  background: rgba(47, 182, 217, 0.12);
  color: var(--signal);
  border-color: rgba(47, 182, 217, 0.35);
}
.nav-item .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: 0.7; flex-shrink: 0; }

.nav-footer {
  margin-top: auto;
  font-size: 11px;
  color: var(--mist);
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  line-height: 1.6;
}

.main {
  padding: 22px 30px 60px;
  overflow-y: auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.topbar h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 24px;
  letter-spacing: 0.01em;
  margin: 0;
}
.topbar .sub { color: var(--mist); font-size: 13px; margin-top: 2px; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--mist);
}
.pill.ok { color: var(--go); border-color: rgba(63,190,114,0.35); background: rgba(63,190,114,0.08); }
.pill.warn { color: var(--flag); border-color: rgba(232,163,61,0.35); background: rgba(232,163,61,0.08); }
.pill.alert { color: var(--alert); border-color: rgba(226,88,79,0.35); background: rgba(226,88,79,0.08); }

.page { display: none; }
.page.active { display: block; }

/* ---------------------------------------------------------------- flow rail (signature element) */

.flow-rail {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 26px;
  margin-bottom: 22px;
  position: relative;
}
.flow-rail-title {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}
.flow-track {
  display: flex;
  align-items: center;
  position: relative;
}
.flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 110px;
  z-index: 2;
}
.flow-node .ring {
  width: 54px; height: 54px;
  border-radius: 50%;
  border: 2px solid var(--signal);
  display: flex; align-items: center; justify-content: center;
  background: var(--ink);
  font-family: var(--font-display);
  font-size: 20px;
}
.flow-node .label { font-size: 12px; color: var(--paper); font-weight: 600; }
.flow-node .count { font-family: var(--font-mono); font-size: 15px; color: var(--signal); }
.flow-connector {
  flex: 1;
  height: 2px;
  background: repeating-linear-gradient(to right, var(--line) 0 6px, transparent 6px 12px);
  position: relative;
  margin: 0 -4px;
  top: -22px;
}
.flow-connector .runner {
  position: absolute;
  top: -3px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--signal);
  animation: run 3.2s linear infinite;
  box-shadow: 0 0 8px rgba(47,182,217,0.8);
}
@keyframes run {
  0% { left: 0%; opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { left: 96%; opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .flow-connector .runner { animation: none; left: 40%; }
}

/* ---------------------------------------------------------------- cards & grid */

.grid { display: grid; gap: 16px; }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1100px) {
  .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
}
.card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.02em;
  margin: 0 0 14px;
  color: var(--mist);
  text-transform: uppercase;
  font-size: 11.5px;
}
.kpi-value { font-family: var(--font-mono); font-size: 30px; color: var(--paper); line-height: 1; }
.kpi-label { color: var(--mist); font-size: 12px; margin-top: 6px; }
.kpi-delta { font-size: 11.5px; margin-top: 8px; }
.kpi-delta.good { color: var(--go); }
.kpi-delta.bad { color: var(--alert); }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; color: var(--mist); font-weight: 500; font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; padding: 8px 10px; border-bottom: 1px solid var(--line); }
td { padding: 9px 10px; border-bottom: 1px solid var(--line); font-family: var(--font-mono); font-size: 12.5px; }
tr:last-child td { border-bottom: none; }
.tag { font-family: var(--font-body); font-size: 11.5px; padding: 2px 8px; border-radius: 5px; }
.tag.packed { background: rgba(138,151,168,0.15); color: var(--mist); }
.tag.loaded { background: rgba(47,182,217,0.15); color: var(--signal); }
.tag.dispatched { background: rgba(63,190,114,0.15); color: var(--go); }
.tag.exception { background: rgba(226,88,79,0.15); color: var(--alert); }

/* ---------------------------------------------------------------- scan page */

.scan-layout { display: grid; grid-template-columns: 380px 1fr; gap: 20px; }
@media (max-width: 900px) { .scan-layout { grid-template-columns: 1fr; } }

.mode-switch { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.mode-btn {
  flex: 1;
  padding: 10px 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel-raised);
  color: var(--mist);
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 600;
  text-align: center;
  min-width: 100px;
}
.mode-btn.active { border-color: var(--signal); color: var(--signal); background: rgba(47,182,217,0.1); }

.scan-video-wrap {
  background: #000;
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  aspect-ratio: 4/3;
  border: 1px solid var(--line);
}
.scan-video-wrap video { width: 100%; height: 100%; object-fit: cover; }
.scan-video-wrap .reticle {
  position: absolute; inset: 18% 12%;
  border: 2px solid var(--signal);
  border-radius: 10px;
  box-shadow: 0 0 0 999px rgba(0,0,0,0.35);
  pointer-events: none;
}
.scan-video-wrap .cam-off {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--mist); font-size: 12.5px; text-align: center; padding: 20px;
  white-space: pre-line;
}

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 11.5px; color: var(--mist); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.03em; }
.field input, .field select {
  width: 100%;
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 10px 12px;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
}
.field input:focus, .field select:focus { outline: 2px solid var(--signal); border-color: var(--signal); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px;
  border-radius: 8px;
  border: 1px solid var(--signal);
  background: var(--signal);
  color: #04222a;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  width: 100%;
}
.btn:hover { background: #45c6e6; }
.btn.secondary { background: transparent; color: var(--paper); border-color: var(--line); font-weight: 500; }
.btn.secondary:hover { border-color: var(--mist); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.log-feed { display: flex; flex-direction: column; gap: 8px; max-height: 480px; overflow-y: auto; }
.log-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--panel-raised);
  border-left: 3px solid var(--line);
  font-size: 12.5px;
}
.log-row.success { border-left-color: var(--go); }
.log-row.error { border-left-color: var(--alert); }
.log-row .barcode { font-family: var(--font-mono); color: var(--paper); }
.log-row .meta { color: var(--mist); font-size: 11px; }
.log-row .offline-tag { color: var(--flag); font-size: 10.5px; font-family: var(--font-mono); }

.banner {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 8px; font-size: 12.5px; margin-bottom: 14px;
}
.banner.offline { background: rgba(232,163,61,0.1); color: var(--flag); border: 1px solid rgba(232,163,61,0.35); }
.banner.info { background: rgba(47,182,217,0.08); color: var(--signal); border: 1px solid rgba(47,182,217,0.3); }

/* ---------------------------------------------------------------- trace page */

.trace-search { display: flex; gap: 10px; margin-bottom: 20px; }
.trace-search input { flex: 1; }
.timeline { position: relative; padding-left: 26px; }
.timeline::before { content: ''; position: absolute; left: 7px; top: 4px; bottom: 4px; width: 2px; background: var(--line); }
.timeline-step { position: relative; padding-bottom: 22px; }
.timeline-step::before {
  content: ''; position: absolute; left: -26px; top: 2px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--signal); border: 3px solid var(--ink);
}
.timeline-step .stage { font-family: var(--font-display); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--paper); }
.timeline-step .detail { color: var(--mist); font-size: 12.5px; margin-top: 3px; }
.timeline-step .ts { font-family: var(--font-mono); color: var(--signal); font-size: 11.5px; margin-top: 2px; }

/* ---------------------------------------------------------------- video analytics page */

.frame-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.frame-card img { width: 100%; display: block; background: #1a1a1a; }
.frame-card .frame-meta { padding: 12px 14px; }
.frame-card .frame-meta .type { font-family: var(--font-display); font-size: 13px; text-transform: capitalize; }
.frame-card .frame-meta .stat { display: flex; justify-content: space-between; font-size: 12px; color: var(--mist); margin-top: 6px; }
.frame-card .frame-meta .stat b { color: var(--paper); font-family: var(--font-mono); }
.accuracy-good { color: var(--go); }
.accuracy-warn { color: var(--flag); }

/* ---------------------------------------------------------------- roadmap page */

.checklist { display: flex; flex-direction: column; gap: 10px; }
.check-item { display: flex; align-items: flex-start; gap: 12px; padding: 12px 14px; border-radius: 8px; background: var(--panel-raised); }
.check-status {
  width: 22px; height: 22px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; flex-shrink: 0; margin-top: 1px;
  font-family: var(--font-mono);
}
.check-status.done { background: rgba(63,190,114,0.18); color: var(--go); }
.check-status.partial { background: rgba(232,163,61,0.18); color: var(--flag); }
.check-status.missing { background: rgba(138,151,168,0.15); color: var(--mist); }
.check-body .title { font-weight: 600; font-size: 13px; }
.check-body .detail { color: var(--mist); font-size: 12px; margin-top: 3px; }

.phase-track { display: flex; gap: 14px; margin-bottom: 20px; }
.phase-card { flex: 1; border-radius: 10px; padding: 16px 18px; border: 1px solid var(--line); }
.phase-card.now { background: rgba(47,182,217,0.08); border-color: rgba(47,182,217,0.35); }
.phase-card.next { background: var(--panel); }
.phase-card .eyebrow { font-family: var(--font-mono); font-size: 10.5px; color: var(--mist); text-transform: uppercase; letter-spacing: 0.08em; }
.phase-card h4 { font-family: var(--font-display); font-size: 16px; margin: 6px 0 8px; }
.phase-card p { color: var(--mist); font-size: 12.5px; line-height: 1.5; margin: 0; }

.readiness-score { display: flex; align-items: baseline; gap: 10px; margin-bottom: 4px; }
.readiness-score .num { font-family: var(--font-mono); font-size: 40px; color: var(--signal); }

.small-mono { font-family: var(--font-mono); font-size: 11.5px; color: var(--mist); }
.section-title { font-family: var(--font-display); font-size: 15px; margin: 26px 0 12px; color: var(--paper); }
.empty-state { color: var(--mist); font-size: 13px; padding: 30px; text-align: center; }
canvas { max-width: 100%; }

@media (max-width: 800px) {
  .app-shell { grid-template-columns: 1fr; }
  .nav-rail { position: sticky; top: 0; z-index: 10; flex-direction: row; overflow-x: auto; padding: 12px; }
  .brand { display: none; }
  .nav-footer { display: none; }
  .main { padding: 16px; }
}

/* ---------------------------------------------------------------- login screen */

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 20%, #17222c 0%, var(--ink) 60%);
  padding: 20px;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px 26px;
}
.login-sub { color: var(--mist); font-size: 12.5px; margin-bottom: 20px; }
.login-error {
  background: rgba(226,88,79,0.1); border: 1px solid rgba(226,88,79,0.35); color: var(--alert);
  font-size: 12px; padding: 9px 12px; border-radius: 7px; margin-bottom: 12px;
}
.login-hint { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); }
.login-hint-title { font-size: 11px; color: var(--mist); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 10px; }
.role-chip-grid { display: flex; flex-direction: column; gap: 6px; }
.role-chip {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--panel-raised); border: 1px solid var(--line); color: var(--paper);
  font-family: var(--font-mono); font-size: 12px; padding: 8px 11px; border-radius: 7px;
  cursor: pointer; text-align: left;
}
.role-chip:hover { border-color: var(--signal); }
.role-chip span { color: var(--mist); font-family: var(--font-body); font-size: 11px; }

.user-badge { padding: 2px 2px 0; }
.user-name { font-size: 12.5px; font-weight: 600; color: var(--paper); }
.user-role { font-size: 10.5px; color: var(--signal); text-transform: capitalize; font-family: var(--font-mono); margin-top: 2px; }