/* Fall Line. The map fills the screen; every control floats on it in dark
   glass, so the slope colours stay the only loud thing on screen. */
:root {
  --glass: rgba(13, 16, 21, 0.86);
  --glass-solid: #12161c;
  --raise: rgba(255, 255, 255, 0.07);
  --raise-2: rgba(255, 255, 255, 0.12);
  --line: rgba(255, 255, 255, 0.11);
  --ink: #f3f6f9;
  --ink-2: #a3aebb;
  --ink-3: #6f7b89;
  --accent: #8fd6ff;      /* glacier ice */
  --accent-ink: #04131d;
  --danger: #ff7a66;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35), 0 1px 0 rgba(255, 255, 255, 0.04) inset;
  --display: "Archivo", "Helvetica Neue", Arial, system-ui, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --top: max(12px, env(safe-area-inset-top));
  --bottom: max(12px, env(safe-area-inset-bottom));
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; overflow: hidden; background: #0d1015; }
body {
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.45;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent); text-underline-offset: 0.18em; }
h2, h3, p, ul, dl, dd { margin: 0; }
ul { padding: 0; list-style: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.map { position: fixed; inset: 0; }
.i { width: 22px; height: 22px; flex: none; }
.glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: var(--shadow);
}
.muted { color: var(--ink-2); }
.small { font-size: 13px; }

/* ---- Top bar ---- */
.topbar {
  position: fixed; z-index: 3;
  top: var(--top); left: 12px; right: 76px;
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
  pointer-events: none;
}
.topbar > * { pointer-events: auto; }
.search-pill {
  display: flex; align-items: center; gap: 10px;
  height: 50px; max-width: 100%;
  padding: 0 20px 0 15px;
  border: 0; border-radius: 25px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: var(--shadow);
  text-align: left;
}
.search-pill .i { color: var(--ink-2); }
.brand { display: flex; align-items: baseline; gap: 6px; font-family: var(--display); font-weight: 800; white-space: nowrap; }
.brand-zh { font-size: 17px; letter-spacing: 0.04em; }
.brand-en { font-size: 13px; font-stretch: 112%; color: var(--accent); text-transform: uppercase; letter-spacing: 0.08em; }
.search-hint {
  color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  padding-left: 10px; border-left: 1px solid var(--line);
}
.status {
  padding: 7px 14px; border-radius: 16px;
  background: var(--glass); box-shadow: var(--shadow);
  font-size: 13px; color: var(--ink-2);
}

/* ---- Right rail ---- */
.rail {
  position: fixed; z-index: 3; top: var(--top); right: 12px;
  display: flex; flex-direction: column; gap: 10px;
}
.fab {
  width: 50px; height: 50px; border: 0; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: var(--shadow);
}
.fab:hover { background: rgba(28, 33, 41, 0.92); }
.fab-text { font-family: var(--display); font-weight: 800; font-size: 15px; letter-spacing: 0.02em; }
.needle { transition: transform 0.12s linear; width: 26px; height: 26px; }

/* ---- Bottom dock: legend and sun bar ---- */
.dock {
  position: fixed; z-index: 2;
  left: 12px; right: 12px; bottom: calc(var(--bottom) + 26px);
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
  pointer-events: none;
}
.dock > * { pointer-events: auto; }
.legend { border-radius: 16px; padding: 9px 11px 10px; max-width: 100%; }
.legend-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 7px; font-size: 13px; }
.legend-head strong { font-family: var(--display); font-weight: 750; font-size: 14px; }
.legend-head .muted { font-size: 11px; }
.bands { display: flex; gap: 3px; }
.band {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  min-width: 40px; padding: 4px 2px 3px; border: 0; border-radius: 8px;
  background: none; font-size: 11.5px; font-variant-numeric: tabular-nums; color: var(--ink);
}
.band i { display: block; width: 34px; height: 12px; border-radius: 4px; background: var(--c); box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.18) inset; }
.band:hover { background: var(--raise); }
.band.off { color: var(--ink-3); }
.band.off i { background: transparent; box-shadow: 0 0 0 1.5px var(--c) inset; opacity: 0.6; }
.aspect-legend { display: flex; align-items: center; gap: 10px; }
.rose { width: 92px; height: 92px; flex: none; }
.rose path { cursor: pointer; stroke: rgba(13, 16, 21, 0.9); stroke-width: 1.2; }
.rose path.off { opacity: 0.18; }
.rose text { font: 800 12px var(--display); fill: var(--ink); }
.rose-labels { display: grid; grid-template-columns: repeat(4, auto); gap: 2px; }
.rose-labels .band { min-width: 38px; }
.rose-labels .band i { width: 22px; height: 9px; }

.sunbar { width: min(560px, 100%); border-radius: 16px; padding: 10px 12px 10px; }
.sun-row { display: flex; align-items: center; gap: 10px; }
.sun-title { display: flex; align-items: center; gap: 6px; font-family: var(--display); font-weight: 750; color: #ffd27a; }
.sun-title .i { width: 18px; height: 18px; }
.sun-date {
  margin-left: auto; padding: 5px 8px; border: 0; border-radius: 10px;
  background: var(--raise); color-scheme: dark; font-size: 14px;
}
.sun-track { position: relative; margin: 10px 0 18px; }
.sun-track input { position: relative; z-index: 1; width: 100%; margin: 0; accent-color: #ffd27a; background: transparent; }
.sun-day { position: absolute; left: 0; right: 0; top: 50%; height: 6px; margin-top: -3px; border-radius: 3px; background: rgba(120, 140, 190, 0.25); }
.sun-day i { position: absolute; top: 0; bottom: 0; border-radius: 3px; background: linear-gradient(90deg, #ff9c5a, #ffe08a 50%, #ff9c5a); opacity: 0.55; }
.sun-day span { position: absolute; top: 12px; transform: translateX(-10%); font-size: 11px; color: var(--ink-2); white-space: nowrap; }
.sun-day span.end { transform: translateX(-90%); }
.sun-read { gap: 12px; font-size: 13px; }
.sun-clock { font-family: var(--display); font-weight: 800; font-size: 20px; font-variant-numeric: tabular-nums; }

.s2bar { width: min(420px, 100%); border-radius: 16px; padding: 10px 12px 12px; }
.s2-title { display: flex; align-items: center; gap: 6px; margin-right: auto; font-family: var(--display); font-weight: 750; color: var(--accent); }
.s2-title .i { width: 18px; height: 18px; }
.s2bar .seg.s2-mode button { padding: 4px 10px; font-size: 13px; }
.s2-row { display: flex; align-items: center; gap: 6px; margin-top: 8px; }
.s2-row .icon-btn:disabled { opacity: 0.3; cursor: default; }
.s2-fwd .i { transform: scaleX(-1); }
.s2-read { flex: 1; min-width: 0; text-align: center; line-height: 1.35; }
.s2-day { font-family: var(--display); font-weight: 800; font-size: 17px; }
.s2-read .small { font-size: 12.5px; }
.s2-read .warn { color: #ffd27a; }
/* The last DAYS days as a strip, one dot per pass, coloured by cloud over the view. */
.s2-days { position: relative; height: 18px; margin: 8px 6px 0; border-radius: 9px; background: linear-gradient(var(--line), var(--line)) center / 100% 2px no-repeat; }
.s2-dot {
  position: absolute; top: 50%; width: 12px; height: 12px; margin: -6px 0 0 -6px; padding: 0;
  border: 0; border-radius: 50%; background: #5d6875;
}
.s2-dot::after { content: ""; position: absolute; inset: -8px -3px; }
.s2-dot.clear { background: var(--accent); }
.s2-dot.part { background: #8a9bb0; }
.s2-dot.est { opacity: 0.55; }
.s2-dot.none { width: 8px; height: 8px; margin: -4px 0 0 -4px; background: none; box-shadow: 0 0 0 1.5px #5d6875 inset; }
.s2-dot.on { box-shadow: 0 0 0 2px var(--glass-solid), 0 0 0 4px #fff; z-index: 1; }

/* ---- Flight: the map gets the whole screen ---- */
.flight-stop {
  position: fixed; z-index: 4; left: 50%; bottom: calc(var(--bottom) + 30px); transform: translateX(-50%);
  display: none; align-items: center; gap: 9px;
  padding: 10px 18px; border: 0; border-radius: 22px;
  font-weight: 650; font-size: 14px;
}
.flight-dot { width: 9px; height: 9px; border-radius: 50%; background: #ff5a3c; box-shadow: 0 0 0 4px rgba(255, 90, 60, 0.25); }
body.flying .flight-stop { display: flex; }
body.flying .sheet, body.flying .dock { display: none !important; }

/* ---- Sheets ---- */
.sheet {
  position: fixed; z-index: 4;
  left: 0; right: 0; bottom: 0;
  max-height: 74dvh; overflow-y: auto; overscroll-behavior: contain;
  padding: 16px 18px calc(var(--bottom) + 18px);
  border-radius: 22px 22px 0 0;
  background: var(--glass);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  backdrop-filter: blur(20px) saturate(1.3);
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.4);
  animation: rise 0.22s ease-out;
}
@keyframes rise { from { transform: translateY(24px); opacity: 0; } }
.sheet-info { max-height: 60dvh; }
.sheet-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.sheet h2 { font-family: var(--display); font-weight: 800; font-size: 22px; letter-spacing: -0.01em; line-height: 1.15; }
.sheet h3 {
  margin: 22px 0 10px;
  font-family: var(--display); font-weight: 700; font-size: 12px; font-stretch: 110%;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-2);
}
.icon-btn {
  width: 36px; height: 36px; flex: none; border: 0; border-radius: 50%;
  display: grid; place-items: center; background: var(--raise); color: var(--ink-2);
}
.icon-btn .i { width: 18px; height: 18px; }
.icon-btn:hover { background: var(--raise-2); color: var(--ink); }
.sheet-x { position: absolute; top: 14px; right: 14px; }

/* Search */
.search-field {
  display: flex; align-items: center; gap: 10px;
  padding: 0 14px; height: 46px; border-radius: 14px; background: var(--raise);
}
.search-field .i { color: var(--ink-2); width: 19px; height: 19px; }
.search-field input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; font-size: 16px; }
.results h3 { margin-top: 18px; }
.result {
  width: 100%; display: flex; flex-direction: column; gap: 1px;
  padding: 10px 12px; margin: 0 -12px; border: 0; border-radius: 12px;
  background: none; text-align: left;
  width: calc(100% + 24px);
}
.result:hover { background: var(--raise); }
.r-name { font-weight: 620; }
.r-name small { margin-left: 8px; font-weight: 400; color: var(--ink-3); font-size: 13px; }
.r-meta { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-2); }
.pill {
  padding: 1px 7px; border-radius: 8px; font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em;
  background: rgba(143, 214, 255, 0.14); color: var(--accent);
}

/* Layers */
.tiles3 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.map-tile {
  position: relative; height: 74px; padding: 0; border: 0; border-radius: 14px; overflow: hidden;
  box-shadow: 0 0 0 1px var(--line) inset;
}
.map-tile span {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 14px 7px 6px;
  font-size: 12px; line-height: 1.2; font-weight: 650; text-align: left;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
}
.map-tile[aria-checked="true"] { box-shadow: 0 0 0 2.5px var(--accent); }
.t-satellite { background: linear-gradient(200deg, transparent 0 34%, rgba(255, 255, 255, 0.0) 34%), linear-gradient(155deg, #eef2f5 0 18%, #b9c0c4 26%, #6f7766 36%, #3f4c34 50%, #2b3824 72%, #3b4430); }
.t-winter { background: radial-gradient(80% 60% at 65% 30%, #ffffff, transparent 70%), linear-gradient(135deg, #f4f7fa 30%, #b9c6d8 55%, #eef2f6 70%), #eef2f6; }
.t-winter span { color: #fff; }
.t-topo { background: repeating-radial-gradient(circle at 60% 40%, #f1ead8 0 7px, #d9c9a4 7px 8px), #f1ead8; }
.t-snow { background: linear-gradient(115deg, transparent 0 46%, #59625e 47% 51%, transparent 52%), linear-gradient(160deg, #ffffff 0 22%, #c9d4e4 30%, #f4f7fb 42%, #2f3a33 58%, #46504a 68%, #e8edf4 76%, #b8c5d8); }
.t-snow span { color: #fff; }
.basemap-note { margin-top: 8px; }

.seg { display: flex; gap: 2px; padding: 3px; border-radius: 13px; background: var(--raise); }
.seg button {
  flex: 1; padding: 8px 6px; border: 0; border-radius: 10px; background: none;
  font-size: 14px; font-weight: 600; color: var(--ink-2); white-space: nowrap;
}
.seg button:hover { color: var(--ink); }
.seg button[aria-checked="true"] { background: var(--accent); color: var(--accent-ink); }
.seg.compact button { padding: 6px 12px; font-size: 13px; }
.slider-row { display: flex; align-items: center; gap: 14px; margin-top: 12px; font-size: 14px; color: var(--ink-2); }
.slider-row input { flex: 1; accent-color: var(--accent); }
.toggles { display: grid; gap: 2px; }
.toggle { display: flex; align-items: center; justify-content: space-between; padding: 8px 0; font-size: 15px; cursor: pointer; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle i { position: relative; width: 44px; height: 26px; border-radius: 13px; background: var(--raise-2); transition: background 0.15s; }
.toggle i::after {
  content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; transition: transform 0.15s;
}
.toggle input:checked + i { background: var(--accent); }
.toggle input:checked + i::after { transform: translateX(18px); background: var(--accent-ink); }
.toggle input:focus-visible + i { outline: 2px solid var(--accent); outline-offset: 2px; }
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; font-size: 15px; }
.track-list { display: grid; gap: 2px; margin-bottom: 8px; }
.track-item { display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 0; border: 0; background: none; text-align: left; }
.track-item i { width: 18px; height: 4px; border-radius: 2px; background: #ff2d8a; flex: none; }
.about { line-height: 1.5; margin-bottom: 8px; }
progress { width: 100%; height: 6px; margin-top: 10px; accent-color: var(--accent); }
#offline-status { margin-top: 6px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 16px; border: 0; border-radius: 12px;
  background: var(--raise-2); font-weight: 650; font-size: 14px;
}
.btn .i { width: 18px; height: 18px; }
.btn:hover { background: rgba(255, 255, 255, 0.18); }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: #b2e3ff; }
.btn.danger { color: var(--danger); }
.btn.ghost { background: none; color: var(--accent); padding-left: 0; margin-top: 12px; }
.btn.small { padding: 5px 10px; font-size: 13px; border-radius: 10px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }

/* Info */
.info-body { padding-right: 40px; }
.eyebrow {
  font-family: var(--display); font-size: 12px; font-weight: 700; font-stretch: 108%;
  text-transform: uppercase; letter-spacing: 0.09em; color: var(--ink-2);
  margin-bottom: 3px;
}
.info-body h2 { margin-bottom: 10px; }
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.badge, .tag { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px 3px 8px; border-radius: 10px; background: var(--raise); font-size: 13px; font-weight: 600; }
.badge b { color: var(--c); font-size: 12px; text-shadow: 0 0 1px #fff, 0 0 2px rgba(255, 255, 255, 0.8); letter-spacing: -0.1em; }
.badge { box-shadow: 0 0 0 1px color-mix(in srgb, var(--c) 60%, transparent) inset; }
.tag { color: var(--ink-2); font-weight: 500; padding-left: 10px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px 10px; margin-bottom: 14px; }
.stat dt { font-size: 12px; color: var(--ink-2); }
.stat dd { font-family: var(--display); font-weight: 750; font-size: 19px; font-variant-numeric: tabular-nums; white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.chip { display: inline-block; width: 10px; height: 10px; border-radius: 3px; flex: none; box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.25) inset; }
.profile-wrap { position: relative; }
.profile { display: block; width: 100%; height: 128px; border-radius: 10px; background: rgba(255, 255, 255, 0.03); touch-action: none; cursor: crosshair; }
.ax {
  position: absolute; left: 6px; padding: 0 5px; border-radius: 5px;
  background: rgba(13, 16, 21, 0.6); font-size: 11px; color: var(--ink-2);
  font-variant-numeric: tabular-nums; pointer-events: none;
}
.ax-top { top: 5px; }
.ax-bottom { bottom: 5px; }
.profile-note { margin-top: 6px; font-size: 12px; color: var(--ink-3); }
.profile-axis { display: flex; justify-content: space-between; gap: 8px; margin-top: 4px; font-size: 12px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.profile-read { display: flex; align-items: center; gap: 5px; color: var(--ink); font-weight: 600; }
.cursor-dot { width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 4px solid #ff2d8a; box-shadow: 0 1px 6px rgba(0, 0, 0, 0.5); }

/* ---- MapLibre chrome ---- */
.maplibregl-ctrl-top-right { display: none; }
.maplibregl-ctrl-bottom-right { bottom: env(safe-area-inset-bottom); }
.maplibregl-ctrl-attrib.maplibregl-compact { background: rgba(13, 16, 21, 0.7); color: var(--ink-2); }
.maplibregl-ctrl-attrib.maplibregl-compact-show { background: rgba(13, 16, 21, 0.92); }
.maplibregl-ctrl-attrib a { color: var(--ink); }
.maplibregl-ctrl-attrib-button { filter: invert(1); background-color: transparent !important; }
.maplibregl-ctrl-scale { background: rgba(13, 16, 21, 0.6); color: var(--ink); border-color: var(--ink-2); font-size: 10px; }
.maplibregl-user-location-dot, .maplibregl-user-location-dot::before { background-color: var(--accent); }

/* Phones: one thing at a time along the bottom. */
@media (max-width: 899px) {
  body.has-sheet .dock, body.has-info .dock { display: none; }
  body.has-sheet .maplibregl-ctrl-bottom-right, body.has-info .maplibregl-ctrl-bottom-right { display: none; }
}
@media (max-width: 520px) {
  .brand-en { display: none; }
  .maplibregl-ctrl-scale { display: none; }
  .band { min-width: 0; flex: 1; }
  .band i { width: 100%; min-width: 26px; }
  .legend { width: 100%; }
  .stats { gap: 10px 8px; }
  .stat dd { font-size: 17px; }
}
@media (max-width: 380px) {
  .search-hint { display: none; }
}

/* Larger screens: panels stand on the left, the map keeps the rest. */
@media (min-width: 900px) {
  .sheet {
    top: calc(var(--top) + 62px); left: 12px; bottom: 12px; right: auto;
    width: 384px; max-height: none; border-radius: var(--radius);
    box-shadow: var(--shadow);
  }
  .sheet-info { bottom: auto; max-height: calc(100dvh - var(--top) - 86px); }
  body.has-sheet .dock, body.has-info .dock { left: 408px; }
  .topbar { right: auto; width: 384px; }
  .search-pill { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .sheet { animation: none; }
}