:root {
  --bg: #F4F6FA;
  --surface: #FFFFFF;
  --surface-2: #F1F4F9;
  --line: #E3E8F0;
  --text: #0F1729;
  --muted: #5E6A82;
  --faint: #98A2B6;
  --primary: #2F5BFF;
  --primary-ink: #FFFFFF;
  --primary-soft: #E9EEFF;
  --primary-deep: #1A3BCB;
  --success: #12B886;
  --danger: #E5484D;
  --warn: #F08C00;
  --r-lg: 24px;
  --r: 16px;
  --shadow-1: 0 1px 2px rgba(15, 23, 41, .06), 0 2px 8px rgba(15, 23, 41, .06);
  --shadow-2: 0 8px 28px rgba(15, 23, 41, .14);
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; background: var(--bg); color: var(--text); font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif; -webkit-font-smoothing: antialiased; }
body { min-height: 100dvh; overflow-x: hidden; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; padding: 0; }
input { font: inherit; }
h1 { font-size: 26px; line-height: 1.15; letter-spacing: -.025em; margin: 4px 0 4px; font-weight: 800; }
h2 { font-size: 22px; letter-spacing: -.02em; margin: 0 0 2px; font-weight: 800; }
h3 { margin: 0; font-size: 17px; font-weight: 700; }
.sub { color: var(--muted); font-size: 14.5px; line-height: 1.45; margin: 0 0 14px; }
.hidden { display: none !important; }
.ic { display: block; flex: none; }
[data-ic] { display: inline-flex; }

/* ---------- screens ---------- */
.screen { display: none; min-height: 100dvh; flex-direction: column; }
.screen.active { display: flex; }

/* map hero + overlapping panel (bottom-sheet layout) */
.hero { position: sticky; top: 0; height: 46dvh; min-height: 300px; background:
  radial-gradient(circle at 1px 1px, #D9DFEA 1px, transparent 0) 0 0 / 18px 18px, #EDF1F7; z-index: 0; }
.hero.tall { height: 50dvh; }
.hero svg.map { position: absolute; inset: calc(58px + var(--safe-t)) 64px 34px 18px; width: calc(100% - 82px); height: calc(100% - 92px - var(--safe-t)); }
.hero-top { position: absolute; top: calc(12px + var(--safe-t)); left: 14px; right: 14px; display: flex; justify-content: space-between; align-items: center; z-index: 2; }
.brand-chip { display: flex; align-items: center; gap: 9px; background: var(--surface); border-radius: 14px; padding: 7px 12px 7px 8px; box-shadow: var(--shadow-1); }
.brand-chip b { display: block; font-size: 15px; line-height: 1.1; }
.brand-chip span { font-size: 12px; color: var(--muted); }
.icon-btn { width: 42px; height: 42px; border-radius: 14px; background: var(--surface); display: grid; place-items: center; box-shadow: var(--shadow-1); color: var(--text); }
.icon-btn.flat { box-shadow: none; background: var(--surface-2); width: 36px; height: 36px; border-radius: 12px; }
.icon-btn:active, .round:active, .btn:active { transform: scale(.97); }

.floor-switch { position: absolute; right: 14px; top: calc(66px + var(--safe-t)); z-index: 2; display: flex; flex-direction: column; background: var(--surface); border-radius: 14px; box-shadow: var(--shadow-1); padding: 4px; gap: 2px; align-items: center; }
.floor-switch button { width: 40px; height: 40px; border-radius: 10px; font-weight: 700; font-size: 14px; color: var(--muted); }
.floor-switch button.on { background: var(--primary); color: #fff; }
.floor-switch .fs-label { position: absolute; right: 0; top: calc(100% + 6px); white-space: nowrap; background: rgba(15,23,41,.82); color: #fff; font-size: 12px; font-weight: 600; padding: 5px 9px; border-radius: 8px; pointer-events: none; }
.floor-switch.dual button:not(.on)::after { content: ""; position: absolute; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); margin: -14px 0 0 14px; }

.panel { position: relative; z-index: 1; margin-top: -26px; background: var(--surface); border-radius: var(--r-lg) var(--r-lg) 0 0; padding: 8px 18px calc(120px + var(--safe-b)); box-shadow: 0 -6px 24px rgba(15,23,41,.08); flex: 1; }
.panel > * { max-width: 620px; margin-left: auto; margin-right: auto; }
.grab { width: 38px; height: 5px; border-radius: 9px; background: #D5DBE6; margin: 0 auto 14px; }

.dock { position: fixed; left: 0; right: 0; bottom: 0; z-index: 5; padding: 12px 18px calc(12px + var(--safe-b)); background: linear-gradient(rgba(255,255,255,0), #fff 30%); }
.dock .btn { max-width: 620px; margin: 0 auto; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 52px; padding: 0 20px; border-radius: 14px; font-weight: 700; font-size: 15.5px; transition: transform .1s, background .2s, opacity .2s; }
.btn.block { display: flex; width: 100%; }
.btn.primary { background: var(--primary); color: var(--primary-ink); box-shadow: 0 6px 18px -6px rgba(47,91,255,.6); }
.btn.primary:disabled { background: #B9C4DD; box-shadow: none; }
.btn.tonal { background: var(--primary-soft); color: var(--primary-deep); }

/* search + lists */
.search { display: flex; align-items: center; gap: 10px; background: var(--surface-2); border-radius: 14px; padding: 0 14px; height: 50px; color: var(--muted); margin: 6px 0 8px; border: 1.5px solid transparent; transition: border-color .15s, background .15s; }
.search:focus-within { border-color: var(--primary); background: #fff; }
.search input { flex: 1; border: 0; background: none; outline: none; font-size: 16px; color: var(--text); min-width: 0; }
.list-h { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); margin: 18px 4px 6px; }
.row-item { width: 100%; display: flex; align-items: center; gap: 14px; text-align: left; padding: 10px 8px; border-radius: 14px; transition: background .15s; }
.row-item:hover { background: var(--surface-2); }
.row-item.on { background: var(--primary-soft); }
.row-item.on .ri-end { color: var(--primary); }
.tile { width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center; background: var(--tint, var(--surface-2)); color: var(--ink, var(--muted)); flex: none; }
.tile.big { width: 56px; height: 56px; border-radius: 16px; }
.ri-body { flex: 1; min-width: 0; }
.ri-body b { display: block; font-size: 15.5px; font-weight: 650; }
.ri-body small { display: block; font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.ri-end { display: flex; align-items: center; gap: 6px; color: var(--faint); }
.ri-steps { text-align: right; }
.ri-steps b { display: block; font-size: 15px; color: var(--text); }
.ri-steps small { font-size: 11px; color: var(--muted); }
.empty { text-align: center; color: var(--faint); padding: 30px 0; display: grid; justify-items: center; gap: 8px; }
.empty p { margin: 0; color: var(--muted); }

.from-row { width: 100%; display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 14px; background: var(--surface-2); text-align: left; margin-bottom: 12px; }
.dot-you { width: 14px; height: 14px; border-radius: 50%; background: var(--primary); border: 3px solid #fff; box-shadow: 0 0 0 4px rgba(47,91,255,.2); flex: none; }
.from-txt { flex: 1; }
.from-txt small { display: block; font-size: 12px; color: var(--muted); }
.from-txt b { font-size: 15px; }
.link { color: var(--primary); font-weight: 600; font-size: 14px; }

.cats { display: flex; gap: 8px; overflow-x: auto; padding: 4px 2px 10px; margin: 0 -18px; padding-left: 18px; padding-right: 18px; scrollbar-width: none; }
.cats::-webkit-scrollbar { display: none; }
.cat { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; height: 38px; padding: 0 14px; border-radius: 999px; border: 1.5px solid var(--line); font-size: 14px; font-weight: 600; color: var(--muted); background: #fff; }
.cat.on { background: var(--text); border-color: var(--text); color: #fff; }

/* preview */
.pv-head { display: flex; gap: 14px; align-items: center; margin-bottom: 14px; }
.pv-head .sub { margin: 0; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 14px; }
.stats div { background: var(--surface-2); border-radius: 14px; padding: 12px 10px; display: grid; justify-items: center; gap: 2px; color: var(--primary); }
.stats b { font-size: 18px; color: var(--text); font-weight: 800; }
.stats span { font-size: 12px; color: var(--muted); }
.pv-actions { display: grid; grid-template-columns: 1.4fr 1fr; gap: 10px; margin-bottom: 8px; }
.sec { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--faint); margin: 22px 2px 8px; font-weight: 700; }
.steps { list-style: none; padding: 0; margin: 0; position: relative; }
.steps li { display: flex; gap: 14px; padding: 10px 0; position: relative; }
.steps li:not(:last-child)::after { content: ""; position: absolute; left: 19px; top: 50px; bottom: -10px; width: 2px; background: var(--line); }
.st-ic { width: 40px; height: 40px; border-radius: 12px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; flex: none; }
.steps li.final .st-ic { background: #FDE8E8; color: var(--danger); }
.st-tx { font-size: 15px; font-weight: 600; padding-top: 2px; }
.st-tx small { display: block; font-weight: 400; color: var(--muted); font-size: 13px; margin-top: 3px; line-height: 1.4; }
.about p { margin: 0 0 8px; color: var(--muted); }
.acts { list-style: none; padding: 0; margin: 6px 0 10px; }
.acts li { display: flex; align-items: center; gap: 10px; padding: 7px 0; font-size: 15px; }
.acts li .ic { color: var(--success); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span { display: inline-flex; align-items: center; gap: 5px; background: var(--surface-2); color: var(--muted); border-radius: 8px; padding: 6px 10px; font-size: 13px; font-weight: 500; }

/* map svg */
svg.map { display: block; font-family: Inter, system-ui, sans-serif; }
.pickable { cursor: pointer; }
.pickable:hover rect { filter: brightness(.97); }
.flow { animation: flow 1s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -14; } }
.fence { animation: flow 1.6s linear infinite; }
.pulse { animation: pulse 1.8s ease-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes pulse { 0% { transform: scale(.5); opacity: .5 } 100% { transform: scale(1.7); opacity: 0 } }

/* ---------- navigation ---------- */
.nav { position: fixed; inset: 0; background: #0B1220; overflow: hidden; color: #fff; }
#cam, #ar-canvas, .cam-fallback, svg.navmap { position: absolute; inset: 0; width: 100%; height: 100%; }
#cam { object-fit: cover; }
.cam-fallback { display: none; background: linear-gradient(180deg, #3A4256 0%, #59617A 48%, #8A8F9E 49%, #B9BCC5 100%); }
.cam-fallback.on { display: block; }
#ar-labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
svg.navmap { display: none; background: radial-gradient(circle at 1px 1px, #D9DFEA 1px, transparent 0) 0 0 / 18px 18px, #EDF1F7; }
.mode-map svg.navmap { display: block; }
.mode-map #cam, .mode-map #ar-canvas, .mode-map #ar-labels, .mode-map .cam-fallback, .mode-map .mini, .mode-map .turn-hint { display: none !important; }

.nav-top { position: absolute; top: 0; left: 0; right: 0; padding: calc(10px + var(--safe-t)) 12px 0; z-index: 4; }
.banner { display: flex; gap: 14px; align-items: center; background: var(--primary-deep); border-radius: 20px 20px 6px 6px; padding: 14px 16px; box-shadow: var(--shadow-2); }
.banner-ic { width: 56px; height: 56px; display: grid; place-items: center; flex: none; }
.banner-body { flex: 1; min-width: 0; }
.banner-dist { font-size: 15px; opacity: .85; font-weight: 600; }
.banner-dist b { font-size: 28px; font-weight: 800; margin-right: 2px; opacity: 1; }
.banner-text { font-size: 18px; font-weight: 700; line-height: 1.25; margin-top: 1px; }
.then { display: inline-flex; align-items: center; gap: 8px; background: #102A9E; border-radius: 0 0 14px 14px; padding: 8px 14px; font-size: 14px; box-shadow: var(--shadow-2); margin-top: 2px; max-width: 100%; }
.then span { opacity: .75; }
.then b { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-chips { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.chip-dark { display: inline-flex; align-items: center; gap: 6px; background: rgba(11,18,32,.72); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); color: #fff; font-size: 12.5px; font-weight: 600; padding: 7px 11px; border-radius: 999px; }
.zdot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 3px rgba(18,184,134,.3); }
.chip-dark.flash { animation: flash .9s ease-out; }
@keyframes flash { 0% { background: var(--success); transform: scale(1.06); } 100% { background: rgba(11,18,32,.72); transform: none; } }
.mode-map .chip-dark { background: rgba(15,23,41,.86); }

.turn-hint { position: absolute; left: 50%; top: 46%; transform: translate(-50%, -50%); z-index: 3; display: flex; align-items: center; gap: 10px; background: rgba(255,255,255,.95); color: var(--text); border-radius: 16px; padding: 12px 18px; font-weight: 800; font-size: 18px; box-shadow: var(--shadow-2); animation: pop .25s ease-out; }
.turn-hint .ic { color: var(--primary); }

/* AR pins */
.ar-pin { position: absolute; left: 0; top: 0; transform-origin: 50% 100%; transition: opacity .3s; will-change: transform; display: flex; flex-direction: column; align-items: center; }
.ar-pin-card { display: flex; align-items: center; gap: 8px; background: rgba(255,255,255,.96); color: var(--text); border-radius: 14px; padding: 7px 12px 7px 7px; box-shadow: 0 6px 20px rgba(0,0,0,.28); white-space: nowrap; }
.ar-pin-ic { width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary); }
.ar-pin-tx b { display: block; font-size: 14px; font-weight: 700; }
.ar-pin-tx small { display: block; font-size: 11.5px; color: var(--muted); max-width: 170px; overflow: hidden; text-overflow: ellipsis; }
.ar-pin-stem { width: 2px; height: 18px; background: rgba(255,255,255,.95); }
.ar-pin.dest .ar-pin-card { background: var(--danger); color: #fff; }
.ar-pin.dest .ar-pin-ic { background: rgba(255,255,255,.2); color: #fff; }
.ar-pin.dest small { color: rgba(255,255,255,.85); }
.ar-pin.dest .ar-pin-stem { background: var(--danger); }
.ar-pin.stairs .ar-pin-ic { background: #FCEBDD; color: #C2621C; }

.mini { position: absolute; left: 12px; bottom: calc(196px + var(--safe-b)); width: 118px; height: 118px; border-radius: 20px; overflow: hidden; border: 3px solid #fff; box-shadow: var(--shadow-2); z-index: 3; background: #EDF1F7; }
.mini svg.map { width: 100%; height: 100%; }
.fab { position: absolute; right: 12px; bottom: calc(200px + var(--safe-b)); width: 52px; height: 52px; border-radius: 16px; background: #fff; color: var(--text); display: grid; place-items: center; box-shadow: var(--shadow-2); z-index: 3; }

.nav-card { position: absolute; left: 0; right: 0; bottom: 0; z-index: 4; background: var(--surface); color: var(--text); border-radius: 24px 24px 0 0; padding: 14px 16px calc(14px + var(--safe-b)); box-shadow: 0 -8px 30px rgba(0,0,0,.25); }
.nav-card-row { display: flex; align-items: center; gap: 12px; max-width: 620px; margin: 0 auto; }
.nav-card-row.two { display: grid; grid-template-columns: 1.5fr 1fr; gap: 10px; margin-top: 12px; }
.round { width: 46px; height: 46px; border-radius: 50%; background: var(--surface-2); display: grid; place-items: center; flex: none; color: var(--text); }
.round.danger { background: #FDE8E8; color: var(--danger); }
.eta { flex: 1; text-align: center; }
.eta b { display: block; font-size: 18px; font-weight: 800; color: var(--success); }
.eta span { font-size: 13px; color: var(--muted); }
.progress { height: 4px; background: var(--surface-2); border-radius: 9px; overflow: hidden; margin: 12px auto 0; max-width: 620px; }
.progress i { display: block; height: 100%; width: 0; background: var(--success); transition: width .4s; }

/* bottom sheets in nav */
.bsheet { position: absolute; left: 10px; right: 10px; bottom: calc(10px + var(--safe-b)); z-index: 6; background: var(--surface); color: var(--text); border-radius: 22px; padding: 20px; box-shadow: var(--shadow-2); animation: up .28s cubic-bezier(.2,.9,.3,1.1); max-width: 520px; margin: 0 auto; }
.bsheet h3 { font-size: 19px; margin: 10px 0 6px; }
.bsheet p { color: var(--muted); font-size: 14.5px; margin: 0 0 16px; line-height: 1.45; }
.bsheet .row { display: flex; gap: 10px; }
.bsheet .row .btn { flex: 1; }
.bs-ic { width: 52px; height: 52px; border-radius: 16px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; }
.bs-ic.warn { background: #FFF1DD; color: var(--warn); }
.bsheet.menu { padding: 8px; }
.bsheet.menu button { display: flex; align-items: center; gap: 14px; width: 100%; padding: 15px 14px; border-radius: 14px; font-weight: 600; text-align: left; }
.bsheet.menu button:hover { background: var(--surface-2); }
.bsheet.menu button .ic { color: var(--primary); }
.bsheet.menu button.muted, .bsheet.menu button.muted .ic { color: var(--muted); }
@keyframes up { from { transform: translateY(30px); opacity: 0; } }

/* overlays */
.overlay { position: fixed; inset: 0; z-index: 20; background: rgba(15,23,41,.45); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); display: flex; align-items: flex-end; justify-content: center; padding: 10px; padding-bottom: calc(10px + var(--safe-b)); }
.sheet-card { background: var(--surface); color: var(--text); border-radius: 26px; padding: 22px; width: 100%; max-width: 480px; max-height: calc(100dvh - 30px); overflow-y: auto; animation: up .3s cubic-bezier(.2,.9,.3,1.1); }
.sc-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.sheet-card .row { display: grid; grid-template-columns: 1fr 1.6fr; gap: 10px; margin-top: 18px; }
.arr-badge { width: 72px; height: 72px; border-radius: 50%; background: var(--success); color: #fff; display: grid; place-items: center; box-shadow: 0 0 0 10px rgba(18,184,134,.14); margin: 4px 0 16px; animation: pop .45s cubic-bezier(.2,1.5,.4,1); }
.over { color: var(--success); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; margin: 0; }
.seg { display: flex; background: var(--surface-2); border-radius: 12px; padding: 4px; margin: 4px 0 12px; }
.seg button { flex: 1; height: 38px; border-radius: 9px; font-weight: 600; color: var(--muted); font-size: 14px; }
.seg button.on { background: #fff; color: var(--text); box-shadow: var(--shadow-1); }
.pk-map { background: var(--surface-2); border-radius: 16px; padding: 10px; }
.pk-map svg { width: 100%; height: auto; aspect-ratio: 568 / 728; max-height: 56dvh; }
#data .stats { margin-top: 6px; }
@keyframes pop { from { transform: scale(.7); opacity: 0; } }

.toast { position: fixed; left: 50%; top: calc(16px + var(--safe-t)); transform: translate(-50%, -16px); background: var(--text); color: #fff; padding: 11px 16px; border-radius: 14px; font-size: 14px; font-weight: 600; opacity: 0; transition: .25s; z-index: 50; pointer-events: none; max-width: calc(100vw - 32px); text-align: center; box-shadow: var(--shadow-2); }
.toast.on { opacity: 1; transform: translate(-50%, 0); }

@media (min-width: 900px) {
  /* desktop: map left, panel right */
  .screen:not(.nav).active { flex-direction: row; }
  .hero, .hero.tall { position: sticky; top: 0; height: 100dvh; flex: 1.2; }
  .panel { margin-top: 0; border-radius: 0; max-width: 520px; flex: 1; min-height: 100dvh; box-shadow: -6px 0 24px rgba(15,23,41,.06); padding-top: 28px; }
  .grab { display: none; }
  .dock { left: auto; width: min(520px, 46vw); right: 0; }
}
body.navving .toast { top: auto; bottom: calc(232px + var(--safe-b)); transform: translate(-50%, 16px); }
body.navving .toast.on { transform: translate(-50%, 0); }

/* v3: camera scan, things, detections */
.search-row { display: flex; gap: 8px; align-items: center; }
.search-row .search { flex: 1; min-width: 0; }
.scan-btn { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1px; width: 60px; height: 50px; border-radius: 14px; background: var(--primary); color: #fff; font-size: 11px; font-weight: 700; flex: none; margin: 6px 0 8px; box-shadow: 0 6px 16px -6px rgba(47,91,255,.6); }
.scan-card { padding: 14px; }
.scan-cam { position: relative; aspect-ratio: 3 / 4; max-height: 52dvh; width: 100%; border-radius: 18px; overflow: hidden; background: #0B1220; margin-bottom: 14px; }
.scan-cam video, .scan-cam canvas { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.scan-frame { position: absolute; inset: 14%; border: 3px solid rgba(255,255,255,.7); border-radius: 22px; box-shadow: 0 0 0 999px rgba(11,18,32,.25); animation: scanp 2s ease-in-out infinite; }
@keyframes scanp { 50% { inset: 17%; border-color: rgba(70,227,183,.9); } }
.scan-card .over { color: var(--primary); }
.scan-card h2 { margin: 2px 0 8px; }
.scan-rank .pr { display: grid; grid-template-columns: 1fr 1fr 40px; gap: 8px; align-items: center; font-size: 13.5px; padding: 2px 0; }
.scan-rank .pr i { display: block; height: 6px; border-radius: 6px; background: var(--primary); }
.scan-rank .pr b { text-align: right; }
.scan-card .tags { margin: 10px 0 0; }
.scan-card .row { display: grid; grid-template-columns: 1fr 1.6fr; gap: 10px; margin-top: 14px; }
#det-canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.mode-map #det-canvas { display: none; }
.chip-dark.cam { background: rgba(70,227,183,.9); color: #06261C; }
.look-here { display: flex; gap: 12px; align-items: center; background: #FFF4E5; color: #8A4B00; border-radius: 14px; padding: 14px; }
.look-here b { display: block; font-size: 16px; color: #5C3200; }
.look-here span { font-size: 13.5px; }