/* ============================================================
   OPTARIS People & Sensing — premium glass occupancy dashboard
   Facilities/retail view. No skeletons, no medical vitals.
   ============================================================ */

:root {
  --bg-deep: #050a14;
  --glass: rgba(16, 30, 52, 0.55);
  --glass-2: rgba(13, 26, 46, 0.42);
  --glass-hi: rgba(255, 255, 255, 0.06);
  --border: rgba(245, 166, 35, 0.16);
  --border-soft: rgba(232, 236, 224, 0.09);
  --navy: #0a1628;
  --green: #00d878;
  --green-bright: #3eff8a;
  --amber: #f5a623;
  --amber-300: #ffc869;
  --blue: #2090ff;
  --red: #ff3040;
  --text-primary: #eef2e8;
  --text-secondary: rgba(238, 242, 232, 0.62);
  --text-label: rgba(238, 242, 232, 0.4);
  --idle: rgba(238, 242, 232, 0.26);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; }
body {
  background: var(--bg-deep);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Ambient backdrop — slow, calm, premium */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 1100px 720px at 16% 4%, rgba(245, 166, 35, 0.10), transparent 58%),
    radial-gradient(ellipse 950px 640px at 88% 100%, rgba(0, 216, 120, 0.07), transparent 60%),
    radial-gradient(ellipse 700px 500px at 60% 50%, rgba(32, 144, 255, 0.045), transparent 65%);
}
body::after {
  content: '';
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: radial-gradient(rgba(245, 166, 35, 0.045) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: radial-gradient(ellipse at center, black 18%, transparent 82%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 18%, transparent 82%);
}

.page {
  position: relative; z-index: 1;
  padding: 22px 26px 30px; max-width: 1500px; margin: 0 auto;
  min-height: 100vh; display: flex; flex-direction: column; gap: 18px;
}

/* ── Glass primitive ──────────────────────────────────────── */
.glass {
  background: var(--glass);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  backdrop-filter: blur(18px) saturate(125%);
  -webkit-backdrop-filter: blur(18px) saturate(125%);
  box-shadow:
    0 1px 0 var(--glass-hi) inset,
    0 18px 50px -28px rgba(0, 0, 0, 0.85);
}

/* ── Header ───────────────────────────────────────────────── */
.top { display: flex; align-items: center; justify-content: space-between; padding: 16px 22px; }
.brand { display: flex; align-items: center; gap: 16px; }
.home-btn {
  flex-shrink: 0; height: 38px; padding: 0 16px 0 13px;
  display: inline-flex; align-items: center; gap: 8px; border-radius: 10px;
  color: var(--amber); text-decoration: none;
  font-size: 13px; font-weight: 600; letter-spacing: 0.4px;
  background: linear-gradient(180deg, rgba(245,166,35,0.18), rgba(245,166,35,0.06));
  border: 1px solid rgba(245,166,35,0.32);
  box-shadow: 0 1px 0 var(--glass-hi) inset, 0 4px 12px -8px rgba(245,166,35,0.6);
  transition: transform .15s, box-shadow .2s, background .2s;
}
.home-btn:hover { transform: translateY(-1px); background: linear-gradient(180deg, rgba(245,166,35,0.3), rgba(245,166,35,0.12)); box-shadow: 0 8px 20px -8px rgba(245,166,35,0.65); }
.home-btn:active { transform: translateY(0); }
.home-btn svg { opacity: 0.95; }

/* Sensors button */
.nodes-btn {
  height: 34px; padding: 0 8px 0 12px; display: inline-flex; align-items: center; gap: 8px;
  border-radius: 999px; cursor: pointer; font-family: inherit;
  font-size: 11.5px; font-weight: 600; letter-spacing: 1px; color: var(--text-secondary);
  background: var(--glass-2); border: 1px solid var(--border-soft);
  transition: border-color .2s, color .2s, background .2s;
}
.nodes-btn:hover { color: var(--text-primary); border-color: rgba(245,166,35,0.35); background: rgba(245,166,35,0.08); }
.nodes-btn svg { color: var(--amber); opacity: 0.9; }
.nodes-btn-count {
  display: inline-grid; place-items: center; min-width: 22px; height: 22px; padding: 0 6px;
  border-radius: 999px; font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 600;
  background: rgba(238,242,232,0.07); color: var(--text-primary);
}
.nodes-btn-count.live { background: rgba(0,216,120,0.16); color: var(--green-bright); }
.nodes-btn-count.warn { background: rgba(245,166,35,0.16); color: var(--amber-300); }
.brand-text { display: flex; flex-direction: column; gap: 3px; }
.brand-logo { font-weight: 300; font-size: 22px; letter-spacing: 3px; line-height: 1; text-shadow: 0 0 28px rgba(245,166,35,0.25); }
.brand-slash { color: var(--amber); opacity: 0.7; margin: 0 1px; }
.brand-section { font-weight: 600; letter-spacing: 4px; }
.brand-sub { font-size: 12px; font-weight: 300; color: var(--text-secondary); letter-spacing: 0.2px; }

.status { display: flex; align-items: center; gap: 14px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  background: var(--glass-2); border: 1px solid var(--border-soft);
  font-size: 11px; letter-spacing: 1.6px; font-weight: 600; color: var(--text-secondary);
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--idle); }
.dot--idle { background: var(--idle); }
.dot--live { background: var(--green-bright); box-shadow: 0 0 10px var(--green-bright); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .4; } }
.clock { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 13px; color: var(--text-label); letter-spacing: 1px; }

/* ── KPI tiles ────────────────────────────────────────────── */
.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.kpi-tile {
  background: var(--glass); border: 1px solid var(--border-soft); border-radius: 18px;
  backdrop-filter: blur(18px) saturate(125%); -webkit-backdrop-filter: blur(18px) saturate(125%);
  box-shadow: 0 1px 0 var(--glass-hi) inset, 0 18px 50px -30px rgba(0,0,0,.8);
  padding: 22px 24px 20px;
  display: flex; flex-direction: column; justify-content: space-between;
  min-height: 138px; position: relative; overflow: hidden;
  transition: transform .25s, border-color .25s;
}
.kpi-tile::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(120% 80% at 0% 0%, rgba(245,166,35,0.07), transparent 55%);
}
.kpi-tile:hover { transform: translateY(-2px); border-color: rgba(245,166,35,0.3); }
.kpi-value {
  font-size: 52px; font-weight: 300; line-height: 1; letter-spacing: -1.5px;
  color: var(--text-primary); font-variant-numeric: tabular-nums;
}
.kpi-value.idle { color: var(--idle); }
.kpi-foot { margin-top: auto; }
.kpi-label { font-size: 11.5px; letter-spacing: 1.8px; text-transform: uppercase; color: var(--text-label); font-weight: 600; }
.kpi-sub { margin-top: 5px; font-size: 12px; color: var(--text-secondary); min-height: 15px; }

/* ── Layout: main + rail (stretch to equal height) ────────── */
.layout { flex: 1; display: grid; grid-template-columns: 1fr 332px; gap: 16px; align-items: stretch; min-height: 0; }
.layout-main { display: flex; flex-direction: column; gap: 16px; min-height: 0; }

.panel {
  background: var(--glass); border: 1px solid var(--border-soft); border-radius: 18px;
  padding: 20px 22px; backdrop-filter: blur(18px) saturate(125%); -webkit-backdrop-filter: blur(18px) saturate(125%);
  box-shadow: 0 1px 0 var(--glass-hi) inset, 0 18px 50px -30px rgba(0,0,0,.8);
}
.chart-panel { flex: 1; display: flex; flex-direction: column; min-height: 280px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.panel-title { font-size: 12.5px; font-weight: 600; letter-spacing: 1.4px; text-transform: uppercase; color: var(--text-primary); }
.panel-meta { font-size: 11.5px; color: var(--text-label); font-family: 'JetBrains Mono', monospace; letter-spacing: 0.3px; }

/* Chart */
.chart-wrap { position: relative; flex: 1; min-height: 180px; }
#occ-canvas { width: 100%; height: 100%; display: block; }
.chart-empty {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px;
  color: var(--text-label);
}
.chart-empty.hidden { display: none; }
.chart-empty-text { text-align: center; font-size: 13.5px; font-weight: 300; color: var(--text-secondary); line-height: 1.6; }
.chart-empty-text small { font-size: 11.5px; color: var(--text-label); }
/* radar pulse */
.radar { position: relative; width: 64px; height: 64px; }
.radar span {
  position: absolute; inset: 0; margin: auto; width: 10px; height: 10px; border-radius: 50%;
  border: 1.5px solid rgba(245,166,35,0.5);
  animation: radar 2.6s cubic-bezier(.2,.6,.4,1) infinite;
}
.radar span:nth-child(2) { animation-delay: .85s; }
.radar span:nth-child(3) { animation-delay: 1.7s; }
@keyframes radar { 0% { width: 8px; height: 8px; opacity: .9; } 100% { width: 64px; height: 64px; opacity: 0; } }
.chart-axis { display: flex; justify-content: space-between; margin-top: 10px; padding: 0 2px; }
.chart-axis span { font-size: 10px; color: var(--text-label); font-family: 'JetBrains Mono', monospace; }

/* Zone heat strip */
.zone-strip { display: flex; flex-direction: column; gap: 12px; }
.zone-row { display: grid; grid-template-columns: 132px 1fr 40px; align-items: center; gap: 16px; }
.zone-name { font-size: 13px; color: var(--text-secondary); letter-spacing: 0.2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.zone-track { height: 10px; border-radius: 999px; background: rgba(238,242,232,0.05); overflow: hidden; box-shadow: 0 1px 1px rgba(0,0,0,.3) inset; }
.zone-fill {
  height: 100%; width: 0%; border-radius: 999px;
  background: linear-gradient(90deg, rgba(245,166,35,0.55), var(--amber));
  box-shadow: 0 0 12px rgba(245,166,35,0.4);
  transition: width .6s cubic-bezier(.22,.61,.36,1), background .4s;
}
.zone-fill.warm { background: linear-gradient(90deg, var(--amber), var(--amber-300)); }
.zone-fill.hot  { background: linear-gradient(90deg, var(--amber-300), var(--red)); }
.zone-count { font-size: 14px; text-align: right; color: var(--text-primary); font-variant-numeric: tabular-nums; font-family: 'JetBrains Mono', monospace; }
.zone-count.idle { color: var(--idle); }

/* Sensing bar */
.sensing-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border-soft); border: 1px solid var(--border-soft);
  border-radius: 16px; overflow: hidden;
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 var(--glass-hi) inset, 0 18px 50px -30px rgba(0,0,0,.8);
}
.sense-stat { background: var(--glass-2); padding: 18px 18px; text-align: center; }
.sense-val { display: block; font-size: 24px; font-weight: 300; color: var(--text-primary); font-variant-numeric: tabular-nums; }
.sense-val.idle { color: var(--idle); }
.sense-lbl { display: block; margin-top: 7px; font-size: 10.5px; letter-spacing: 1px; text-transform: uppercase; color: var(--text-label); }

/* ── Right rail: live activity feed (full height) ─────────── */
.rail {
  background: var(--glass); border: 1px solid var(--border-soft); border-radius: 18px;
  padding: 20px 18px 14px; backdrop-filter: blur(18px) saturate(125%); -webkit-backdrop-filter: blur(18px) saturate(125%);
  box-shadow: 0 1px 0 var(--glass-hi) inset, 0 18px 50px -30px rgba(0,0,0,.8);
  display: flex; flex-direction: column; min-height: 0;
}
.rail-pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--idle); }
.rail-pulse.live { background: var(--green-bright); box-shadow: 0 0 8px var(--green-bright); animation: pulse 2s ease-in-out infinite; }
.feed { flex: 1; display: flex; flex-direction: column; gap: 2px; overflow-y: auto; }
.feed-empty { margin: auto; color: var(--idle); font-size: 13px; font-weight: 300; padding: 24px 4px; text-align: center; }
.feed-row {
  display: flex; align-items: center; gap: 12px; padding: 12px 6px;
  border-bottom: 1px solid var(--border-soft); animation: feedin .35s ease;
}
.feed-row:last-child { border-bottom: none; }
@keyframes feedin { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }
.feed-icon { width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center; font-size: 14px; font-weight: 700; flex-shrink: 0; }
.feed-icon.enter { background: rgba(0,216,120,0.16); color: var(--green-bright); }
.feed-icon.exit  { background: rgba(245,166,35,0.16); color: var(--amber-300); }
.feed-body { flex: 1; min-width: 0; }
.feed-text { font-size: 13px; color: var(--text-primary); }
.feed-text b { font-weight: 600; }
.feed-zone { color: var(--text-secondary); }
.feed-time { font-size: 10.5px; color: var(--text-label); font-family: 'JetBrains Mono', monospace; margin-top: 2px; }

/* ── Sensing node health modal ────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 50;
  display: flex; align-items: center; justify-content: center; padding: 24px;
  background: rgba(3, 7, 14, 0.62); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  animation: fade .2s ease;
}
.modal-backdrop[hidden] { display: none; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal {
  width: min(720px, 100%); max-height: 82vh; display: flex; flex-direction: column;
  padding: 0; overflow: hidden; animation: rise .26s cubic-bezier(.2,.7,.3,1);
}
@keyframes rise { from { opacity: 0; transform: translateY(14px) scale(.985); } to { opacity: 1; transform: none; } }
.modal-head { display: flex; align-items: flex-start; justify-content: space-between; padding: 22px 24px 16px; border-bottom: 1px solid var(--border-soft); }
.modal-title { font-size: 16px; font-weight: 600; letter-spacing: 0.4px; }
.modal-sub { margin-top: 4px; font-size: 12.5px; color: var(--text-secondary); }
.modal-close { width: 32px; height: 32px; border-radius: 9px; border: 1px solid var(--border-soft); background: var(--glass-2); color: var(--text-secondary); font-size: 20px; line-height: 1; cursor: pointer; transition: color .2s, border-color .2s; }
.modal-close:hover { color: var(--text-primary); border-color: rgba(245,166,35,0.4); }
.modal-body { padding: 14px 24px; overflow-y: auto; }
.nodes-empty { text-align: center; padding: 40px 12px; color: var(--text-secondary); font-size: 13.5px; font-weight: 300; line-height: 1.7; }
.nodes-empty small { color: var(--text-label); font-size: 11.5px; }
.modal-foot { padding: 12px 24px; border-top: 1px solid var(--border-soft); font-size: 11px; color: var(--text-label); font-family: 'JetBrains Mono', monospace; letter-spacing: 0.3px; }
.modal-foot span { color: var(--text-secondary); }

/* node cards */
.node-card {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px;
  padding: 14px 16px; margin-bottom: 10px; border-radius: 13px;
  background: var(--glass-2); border: 1px solid var(--border-soft);
}
.node-card:last-child { margin-bottom: 0; }
.node-led { width: 11px; height: 11px; border-radius: 50%; flex-shrink: 0; }
.node-led.online { background: var(--green-bright); box-shadow: 0 0 10px var(--green-bright); }
.node-led.stale  { background: var(--amber-300); box-shadow: 0 0 10px rgba(245,166,35,0.6); }
.node-led.offline{ background: var(--idle); }
.node-main { min-width: 0; }
.node-id { font-size: 14px; font-weight: 600; color: var(--text-primary); font-family: 'JetBrains Mono', monospace; }
.node-state { margin-left: 8px; font-size: 10px; letter-spacing: 1px; text-transform: uppercase; font-weight: 600; }
.node-state.online { color: var(--green-bright); }
.node-state.stale  { color: var(--amber-300); }
.node-state.offline{ color: var(--idle); }
.node-meta { margin-top: 7px; display: flex; flex-wrap: wrap; gap: 6px 16px; }
.node-meta span { font-size: 11.5px; color: var(--text-secondary); font-family: 'JetBrains Mono', monospace; }
.node-meta b { color: var(--text-primary); font-weight: 600; }
/* RSSI signal bars */
.node-rssi { display: flex; align-items: flex-end; gap: 3px; height: 26px; }
.node-rssi i { width: 4px; border-radius: 2px; background: rgba(238,242,232,0.14); }
.node-rssi i.on { background: var(--amber); box-shadow: 0 0 8px rgba(245,166,35,0.5); }
.node-rssi i:nth-child(1){height:8px} .node-rssi i:nth-child(2){height:13px}
.node-rssi i:nth-child(3){height:18px} .node-rssi i:nth-child(4){height:26px}
.node-hint { grid-column: 1 / -1; margin-top: 8px; padding: 8px 10px; border-radius: 8px; background: rgba(245,166,35,0.08); border: 1px solid rgba(245,166,35,0.18); font-size: 11.5px; color: var(--amber-300); line-height: 1.5; }

/* Help button */
.help-btn { padding: 0 14px; }
.help-btn svg { color: var(--blue); }
.help-btn:hover { border-color: rgba(32,144,255,0.4); background: rgba(32,144,255,0.08); }

/* Help body */
.help-body { font-size: 13px; line-height: 1.62; }
.help-sec { padding: 16px 0; border-bottom: 1px solid var(--border-soft); }
.help-sec:first-child { padding-top: 4px; }
.help-sec:last-child { border-bottom: none; }
.help-sec h4 { font-size: 12px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--amber); margin-bottom: 8px; font-weight: 600; }
.help-sec p { color: var(--text-secondary); margin-bottom: 6px; }
.help-sec ul { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.help-sec li { color: var(--text-secondary); padding-left: 16px; position: relative; }
.help-sec li::before { content: '›'; position: absolute; left: 2px; color: var(--amber); }
.help-sec b { color: var(--text-primary); font-weight: 600; }
.help-sec code { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; background: rgba(238,242,232,0.08); border: 1px solid var(--border-soft); border-radius: 5px; padding: 1px 6px; color: var(--amber-300); }
.pill { display: inline-block; padding: 1px 9px; border-radius: 999px; font-size: 10px; font-weight: 700; letter-spacing: 1px; margin-right: 4px; }
.pill.idle { background: rgba(238,242,232,0.1); color: var(--text-secondary); }
.pill.live { background: rgba(0,216,120,0.16); color: var(--green-bright); }
.pill.warn { background: rgba(245,166,35,0.16); color: var(--amber-300); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1080px) {
  .layout { grid-template-columns: 1fr; }
  .rail { min-height: 320px; }
}
@media (max-width: 720px) {
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .sensing-bar { grid-template-columns: repeat(2, 1fr); }
  .zone-row { grid-template-columns: 104px 1fr 34px; }
  .page { padding: 16px 14px 24px; }
  .brand-sub { display: none; }
}

/* Debug button (dev-only, removed later) — distinct dashed accent */
a.debug-btn { text-decoration: none; border-style: dashed !important; border-color: rgba(140,170,255,0.4) !important; color: #9db8ff; }
a.debug-btn svg { color: #9db8ff; }
a.debug-btn:hover { color: #c2d2ff; border-color: rgba(140,170,255,0.7) !important; background: rgba(140,170,255,0.08); }
.nodes-btn-count[hidden] { display: none !important; }