:root {
  --bg: #0b1220;
  --glass: rgba(12, 18, 30, 0.72);
  --glass-2: rgba(20, 28, 44, 0.86);
  --line: rgba(255, 255, 255, 0.09);
  --line-2: rgba(255, 255, 255, 0.16);
  --fg: #e8edf5;
  --fg-2: #a7b2c4;
  --fg-3: #6f7b8f;
  --accent: #4cc2ff;
  --live: #3ddc84;
  --warn: #ffb547;
  --bad: #ff5a5f;
  --radius: 12px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; background: var(--bg); color: var(--fg); font: 13px/1.4 var(--font); -webkit-font-smoothing: antialiased; }
#view { position: fixed; inset: 0; width: 100vw; height: 100vh; display: block; touch-action: none; outline: none; }
#labels { position: fixed; inset: 0; pointer-events: none; overflow: hidden; }
/* dragging the map across labels, chips or the toolbar mustn't select their text */
#labels, #top, #next, #compass, #mapwrap, #credits, #ui-show, #uimenu { -webkit-user-select: none; user-select: none; }
button { font: inherit; color: inherit; }
a { color: var(--fg-2); }

/* ---------- labels over aircraft ---------- */
.lbl { position: absolute; left: 0; top: 0; transform: translate(-50%, -100%); white-space: nowrap; pointer-events: auto; cursor: pointer;
  font: 600 11px/1.15 var(--font); color: #fff; padding: 3px 6px 3px 6px; border-radius: 6px; background: rgba(10, 14, 24, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.12); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); will-change: transform, opacity; }
.lbl small { display: block; font: 500 9.5px/1.2 var(--mono); color: var(--fg-2); }
.lbl::after { content: ""; position: absolute; left: 50%; bottom: -5px; width: 1px; height: 5px; background: rgba(255, 255, 255, 0.35); }
.lbl i { display: inline-block; width: 7px; height: 7px; border-radius: 2px; margin-right: 5px; vertical-align: 0; }
.lbl.sel { background: rgba(76, 194, 255, 0.28); border-color: rgba(76, 194, 255, 0.8); }
.lbl.sched { opacity: 0.75; font-style: italic; }
.lbl.dim small { display: none; }

/* ---------- loading ---------- */
#loading { position: fixed; inset: 0; display: grid; place-items: center; background: radial-gradient(ellipse at 50% 40%, #13213a 0%, #0b1220 70%); z-index: 50; transition: opacity 0.6s; }
#loading.done { opacity: 0; pointer-events: none; }
.load-card { width: min(360px, 86vw); text-align: center; }
.load-card .brand { font-size: 28px; justify-content: center; margin-bottom: 18px; }
.load-step { color: var(--fg-2); font-size: 13px; min-height: 18px; }
.load-bar { margin-top: 12px; height: 3px; background: rgba(255, 255, 255, 0.08); border-radius: 2px; overflow: hidden; }
.load-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), #8f7bff); transition: width 0.3s; }

/* ---------- top bar ---------- */
#top { position: fixed; top: 12px; left: 12px; right: 12px; display: flex; align-items: center; gap: 12px; z-index: 10; pointer-events: none; }
#top > * { pointer-events: auto; }
.brand { display: flex; align-items: center; gap: 2px; font: 600 17px/1 var(--font); letter-spacing: 0.06em; color: var(--fg); }
.brand b { font-weight: 800; color: var(--accent); margin-left: 3px; }
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--fg-3); margin-right: 8px; }
.brand .dot.live { background: var(--live); box-shadow: 0 0 0 0 rgba(61, 220, 132, 0.6); animation: pulse 2s infinite; }
.brand .dot.stale { background: var(--warn); animation: none; }
.brand .dot.down { background: var(--bad); animation: none; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(61, 220, 132, 0.5); } 70% { box-shadow: 0 0 0 8px rgba(61, 220, 132, 0); } 100% { box-shadow: 0 0 0 0 rgba(61, 220, 132, 0); } }
#top > .brand { background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius); padding: 9px 13px; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.chips { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; min-width: 0; }
.chip { background: var(--glass); border: 1px solid var(--line); border-radius: 999px; padding: 6px 11px; color: var(--fg-2); font: 500 12px/1 var(--font); white-space: nowrap; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.chip b { color: var(--fg); font-weight: 600; }
.bar { display: flex; gap: 6px; align-items: center; }
.seg { display: flex; align-items: center; gap: 2px; background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius); padding: 3px; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.seg button { border: 0; background: transparent; padding: 7px 12px; border-radius: 9px; cursor: pointer; color: var(--fg-2); font-weight: 500; }
.seg button:hover:not(:disabled) { color: var(--fg); background: rgba(255, 255, 255, 0.06); }
.seg button.on { background: rgba(76, 194, 255, 0.18); color: #fff; }
.seg button:disabled { opacity: 0.35; cursor: default; }
.seg button.icon { width: 34px; height: 32px; padding: 0; display: grid; place-items: center; font-weight: 700; font-size: 14px; }
.seg button.icon svg { width: 18px; height: 18px; }
.seg select { background: transparent; color: var(--fg-2); border: 0; padding: 7px 6px; font: 500 13px var(--font); cursor: pointer; outline: none; max-width: 150px; }
.seg select option { background: #141c2c; color: var(--fg); }

/* ---------- panels ---------- */
.panel { position: fixed; z-index: 9; background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius); backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2); box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35); }
.panel.hidden { display: none; }
#list { left: 12px; top: 66px; bottom: 300px; width: 300px; display: flex; flex-direction: column; overflow: hidden; }
.panel-head { padding: 10px; border-bottom: 1px solid var(--line); display: flex; gap: 6px; }
.fold { border: 1px solid var(--line); background: rgba(255,255,255,0.05); color: var(--fg-2); border-radius: 8px; width: 30px; cursor: pointer; font-size: 16px; }
.fold-open { left: 12px; top: 66px; width: 30px; height: 40px; cursor: pointer; color: var(--fg-2); font-size: 16px; }
#list.folded { display: none; }
#search { width: 100%; background: rgba(255, 255, 255, 0.06); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; color: var(--fg); font: inherit; outline: none; }
#search:focus { border-color: rgba(76, 194, 255, 0.6); }
.tabs { display: flex; gap: 2px; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.tabs button { flex: 1; border: 0; background: transparent; color: var(--fg-3); padding: 6px 2px; border-radius: 7px; cursor: pointer; font-size: 11.5px; font-weight: 600; }
.tabs button.on { color: var(--fg); background: rgba(255, 255, 255, 0.08); }
.rows { overflow-y: auto; flex: 1; padding: 4px 0; scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.15) transparent; }
.row { display: grid; grid-template-columns: 8px 1fr auto; gap: 9px; align-items: center; padding: 7px 12px; cursor: pointer; border-left: 2px solid transparent; }
.row:hover { background: rgba(255, 255, 255, 0.04); }
.row.sel { background: rgba(76, 194, 255, 0.12); border-left-color: var(--accent); }
.row .sw { width: 8px; height: 26px; border-radius: 3px; }
.row .t1 { font-weight: 600; font-size: 13px; color: var(--fg); }
.row .t1 span { font-weight: 500; color: var(--fg-3); font-size: 11.5px; margin-left: 6px; }
.row .t2 { color: var(--fg-3); font-size: 11.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row .st { text-align: right; font-size: 11px; color: var(--fg-2); }
.row .st b { display: block; font: 600 12px var(--mono); color: var(--fg); }
.pill { display: inline-block; padding: 2px 7px; border-radius: 999px; font: 600 10.5px/1.3 var(--font); letter-spacing: 0.02em; background: rgba(255, 255, 255, 0.08); color: var(--fg-2); }
.pill.p-PARKED { background: rgba(160, 170, 190, 0.16); }
.pill.p-PUSHBACK, .pill.p-TAXI, .pill.p-HOLD { background: rgba(255, 181, 71, 0.18); color: #ffd28f; }
.pill.p-LINEUP, .pill.p-TAKEOFF, .pill.p-LANDING { background: rgba(255, 90, 95, 0.2); color: #ffb3b5; }
.pill.p-APPROACH, .pill.p-DESCENT { background: rgba(76, 194, 255, 0.18); color: #a9e2ff; }
.pill.p-CLIMB, .pill.p-CRUISE { background: rgba(143, 123, 255, 0.2); color: #cdc3ff; }
.pill.sched { background: rgba(255, 255, 255, 0.05); color: var(--fg-3); font-style: italic; }

#info { right: 12px; top: 66px; width: 340px; max-height: calc(100vh - 120px); overflow-y: auto; padding: 16px 16px 14px; }
#info .close { position: absolute; top: 8px; right: 10px; border: 0; background: transparent; color: var(--fg-3); font-size: 22px; cursor: pointer; line-height: 1; }
.info-al { display: flex; align-items: center; gap: 10px; }
.info-al .tail { width: 34px; height: 34px; border-radius: 8px; flex: none; }
.info-al h2 { margin: 0; font: 700 20px/1.1 var(--font); }
.info-al .sub { color: var(--fg-2); font-size: 12px; }
.route { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 8px; margin: 14px 0 10px; }
.route .ap { font: 700 24px/1 var(--font); }
.route .ap small { display: block; font: 500 11px/1.3 var(--font); color: var(--fg-3); margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.route .ap.r { text-align: right; }
.route .arrow { color: var(--fg-3); font-size: 16px; }
.kv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin: 10px 0; }
.kv div { background: var(--glass-2); padding: 8px 10px; }
.kv label { display: block; font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg-3); }
.kv b { font: 600 14px/1.3 var(--mono); color: var(--fg); }
.info-sec { margin-top: 12px; }
.info-sec h3 { margin: 0 0 6px; font: 600 10.5px/1 var(--font); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); }
.times { width: 100%; border-collapse: collapse; font-size: 12px; }
.times td { padding: 3px 0; color: var(--fg-2); }
.times td:last-child { text-align: right; font-family: var(--mono); color: var(--fg); }
.note { font-size: 11.5px; color: var(--fg-3); margin-top: 8px; }
.btns { display: flex; gap: 6px; margin-top: 12px; }
.btns button { flex: 1; border: 1px solid var(--line-2); background: rgba(255, 255, 255, 0.05); padding: 8px; border-radius: 8px; cursor: pointer; font-weight: 600; }
.btns button:hover { background: rgba(255, 255, 255, 0.1); }
.btns button.on { background: rgba(76, 194, 255, 0.2); border-color: rgba(76, 194, 255, 0.6); }

.env-row { display: flex; align-items: center; gap: 8px; margin: 3px 0; }
.env-row label { color: var(--fg-3); min-width: 54px; }
.env-row input[type=range] { flex: 1; accent-color: var(--accent); }
.env-row select { flex: 1; background: rgba(255,255,255,0.06); color: var(--fg); border: 1px solid var(--line); border-radius: 6px; padding: 4px; font: inherit; }
.env-row span { min-width: 54px; text-align: right; font-family: var(--mono); color: var(--fg); }
.env-row input[type=checkbox] { accent-color: var(--accent); margin-right: 10px; }

#credits { position: fixed; left: 12px; right: 12px; bottom: 10px; font-size: 10.5px; color: rgba(220, 228, 240, 0.55); text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6); z-index: 8; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; pointer-events: auto; }
#credits a { color: rgba(220, 228, 240, 0.75); }

@media (max-width: 820px) {
  #top { flex-wrap: wrap; }
  .chips { order: 3; flex-basis: 100%; }
  #chip-count, #chip-time { display: none; }
  #list { top: auto; bottom: 34px; left: 8px; right: 8px; width: auto; height: 34vh; }
  #info { left: 8px; right: 8px; width: auto; top: auto; bottom: 34px; max-height: 50vh; }
  .cams button { padding: 7px 9px; }
}

/* ---------- minimap, compass, next arrivals, toasts, help, debug ---------- */
#mapwrap { left: 12px; bottom: 34px; width: 300px; height: 250px; overflow: hidden; padding: 0; }
#mapwrap.big { left: 50%; top: 50%; bottom: auto; transform: translate(-50%, -50%); width: min(1100px, 92vw); height: min(760px, 82vh); z-index: 20; }
#map { position: absolute; inset: 0; }
#map canvas { display: block; cursor: crosshair; touch-action: none; }
.map-btn { position: absolute; right: 6px; bottom: 6px; z-index: 2; border: 1px solid var(--line-2); background: rgba(12,18,30,0.8); color: var(--fg); border-radius: 7px; width: 28px; height: 26px; cursor: pointer; }
#compass { right: 12px; bottom: 34px; width: 52px; height: 52px; border-radius: 50%; padding: 4px; cursor: pointer; display: grid; place-items: center; }
#compass svg { width: 40px; height: 40px; }
#next { position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%); z-index: 8; display: flex; gap: 6px; }
#next.hidden { display: none; }
#next .na { background: var(--glass); border: 1px solid var(--line); border-radius: 10px; padding: 6px 10px; cursor: pointer; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); font-size: 12px; color: var(--fg-2); white-space: nowrap; }
#next .na b { color: var(--fg); font-weight: 700; margin-right: 6px; }
#next .na span { font-family: var(--mono); color: #a9e2ff; margin-left: 6px; }
#next .na:hover { border-color: rgba(76, 194, 255, 0.6); }
#next .title { align-self: center; font: 600 10.5px var(--font); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); padding: 0 4px; }
#toast { position: fixed; left: 50%; top: 66px; transform: translateX(-50%); z-index: 30; display: flex; flex-direction: column; gap: 6px; align-items: center; pointer-events: none; }
#toast .t { background: rgba(14, 20, 34, 0.92); border: 1px solid var(--line-2); border-radius: 10px; padding: 9px 14px; font-size: 13px; color: var(--fg); box-shadow: 0 8px 30px rgba(0,0,0,0.4); pointer-events: auto; display: flex; gap: 10px; align-items: center; animation: tin 0.25s ease-out; }
#toast .t button { border: 1px solid rgba(76, 194, 255, 0.6); background: rgba(76, 194, 255, 0.18); color: #fff; border-radius: 7px; padding: 4px 9px; cursor: pointer; font-weight: 600; }
@keyframes tin { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
#help { left: 50%; top: 50%; transform: translate(-50%, -50%); width: min(620px, 92vw); padding: 18px 20px; z-index: 25; }
#help h3 { margin: 0 0 10px; font-size: 15px; }
#help td { padding: 5px 10px 5px 0; vertical-align: top; color: var(--fg-2); font-size: 12.5px; }
#help td:first-child { white-space: nowrap; color: var(--fg); }
#help .close, #info .close { position: absolute; top: 8px; right: 10px; border: 0; background: transparent; color: var(--fg-3); font-size: 22px; cursor: pointer; line-height: 1; }
#debug { right: 74px; bottom: 34px; padding: 10px 12px; width: 330px; font-size: 12px; z-index: 12; }
.dbg-head { font-weight: 700; margin-bottom: 6px; color: #ffd28f; display: flex; justify-content: space-between; }
.dbg-head span { font-weight: 500; color: var(--fg-3); font-family: var(--mono); }
#dbg-stats { margin: 6px 0 0; font: 11px/1.45 var(--mono); color: var(--fg-2); white-space: pre-wrap; max-height: 220px; overflow: auto; }
.follow-hud { margin-top: 8px; display: flex; gap: 6px; flex-wrap: wrap; }
.row .eta { font: 600 11px var(--mono); color: #a9e2ff; }
@media (max-width: 820px) {
  #mapwrap { width: 46vw; height: 30vh; bottom: auto; top: 110px; left: 8px; }
  #compass { bottom: auto; top: 110px; right: 8px; }
  #next { display: none; }
  .seg select { max-width: 90px; }
  .seg button { padding: 7px 8px; }
}

/* ---------- tucking the interface away: the panels menu, clean view (U), the mini map's fold ---------- */
#uimenu { top: 62px; right: 12px; width: 220px; padding: 8px; z-index: 22; display: flex; flex-direction: column; gap: 2px; }
#uimenu.hidden { display: none; }
#uimenu .ui-clean { display: flex; justify-content: space-between; align-items: center; border: 1px solid var(--line-2); background: rgba(76, 194, 255, 0.14); color: #fff; border-radius: 8px; padding: 8px 10px; margin-bottom: 4px; cursor: pointer; font-weight: 600; }
#uimenu .ui-clean:hover { background: rgba(76, 194, 255, 0.24); }
#uimenu .tg { display: flex; align-items: center; gap: 9px; padding: 6px 8px; border-radius: 7px; cursor: pointer; color: var(--fg-2); }
#uimenu .tg:hover { background: rgba(255, 255, 255, 0.06); color: var(--fg); }
#uimenu .tg input { accent-color: var(--accent); margin: 0; }
#uimenu .tg span { flex: 1; }
#uimenu .tg small { color: var(--fg-3); font-size: 11px; margin-left: 3px; }
#uimenu kbd, #help kbd { font: 500 10.5px/1 var(--mono); color: var(--fg-3); border: 1px solid var(--line-2); border-radius: 4px; padding: 2px 5px; }
#ui-show { top: 12px; right: 12px; z-index: 11; display: flex; align-items: center; gap: 7px; padding: 7px 11px 7px 9px; color: var(--fg-2); cursor: pointer; opacity: 0.55; transition: opacity 0.2s; border-radius: 999px; }
#ui-show:hover, #ui-show:focus-visible { opacity: 1; color: var(--fg); }
#ui-show svg { width: 17px; height: 17px; }
#ui-show span { font-weight: 600; font-size: 12px; }
#ui-show.hidden, #map-open.hidden { display: none; }
.map-fold { right: 38px; }
#map-open { left: 12px; bottom: 34px; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; color: var(--fg-2); cursor: pointer; padding: 0; }
#map-open:hover { color: var(--fg); }
#map-open svg { width: 20px; height: 20px; }
body.hide-map #mapwrap:not(.big) { display: none; }
body.hide-map #list { bottom: 84px; }
body.hide-next #next { display: none; }
body.hide-chips #top .chips { visibility: hidden; }
body.hide-compass #compass { display: none; }
body.clean #top, body.clean #list, body.clean #list-open, body.clean #info, body.clean #next, body.clean #mapwrap:not(.big),
body.clean #compass, body.clean #map-open, body.clean #debug, body.clean #uimenu { display: none !important; }
body.clean #credits { opacity: 0.4; }
.donate-note.hidden, .donate-foot.hidden { display: none; }
#credits .donate-link { color: #ffb3c1; text-decoration: none; }
#credits .donate-link:hover { text-decoration: underline; }
/* narrow desktops and tablets: the status chips get their own row under the toolbar instead of wrapping over the list */
@media (min-width: 821px) and (max-width: 1240px) {
  #top { flex-wrap: wrap; row-gap: 8px; }
  .bar { margin-left: auto; }
  .chips { order: 3; flex-basis: 100%; }
  #list, .fold-open, #info { top: 100px; }
}
/* phones: row 1 the brand and the icon buttons, row 2 the cameras, row 3 the status chips (everything stays on screen) */
@media (max-width: 820px) {
  #top { top: 8px; left: 8px; right: 8px; gap: 8px; }
  #top > .brand { order: 1; padding: 8px 11px; font-size: 15px; }
  .bar { display: contents; }
  .bar > .seg:last-child { order: 2; margin-left: auto; }
  #cams { order: 3; flex-basis: 100%; justify-content: space-between; }
  #cams button { flex: 1; padding: 7px 4px; }
  .chips { order: 4; }
  #b-map { display: none; }   /* the mini map has its own full-screen button */
  .seg select { width: 34px; max-width: 34px; padding: 0; color: transparent; cursor: pointer;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 21s-6.5-6.2-6.5-11a6.5 6.5 0 0 1 13 0c0 4.8-6.5 11-6.5 11Z' fill='none' stroke='%23a7b2c4' stroke-width='1.7'/%3E%3Ccircle cx='12' cy='10' r='2.3' fill='none' stroke='%23a7b2c4' stroke-width='1.7'/%3E%3C/svg%3E") center / 18px no-repeat; -webkit-appearance: none; appearance: none; }
  #uimenu { top: 58px; right: 8px; }
  #mapwrap, #compass, #map-open { top: 154px; }
  #list-open { top: auto; bottom: 34px; left: 8px; }   /* the list opens from the bottom on phones */
  #map-open { bottom: auto; left: 8px; }
  body.hide-map #list { bottom: 34px; }
}

/* the live viewer count */
.chip.hidden { display: none; }
#chip-viewers .live-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--live); margin-right: 6px; vertical-align: 1px; box-shadow: 0 0 6px rgba(61, 220, 132, 0.7); }