:root {
  --bg: #03070d;
  --surface: rgba(10, 17, 29, 0.82);
  --surface-solid: #0b1422;
  --border: rgba(148, 178, 210, 0.14);
  --hover: rgba(255, 255, 255, 0.06);
  --text: #e6eef7;
  --muted: #8b9cb1;
  --faint: #5f7087;
  --accent: #4cc9f0;
  --accent-soft: rgba(76, 201, 240, 0.14);
  --danger: #ef476f;
  --radius: 12px;
  --gap: 12px;
  --bar-h: 52px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); overflow: hidden; }
[hidden] { display: none !important; }
svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

#map, #globe { position: fixed; inset: 0; width: 100vw; height: 100vh; display: block; cursor: crosshair; }
#globe { cursor: grab; }
#globe:active { cursor: grabbing; }

/* Floating surfaces share one look. */
.bar, .side, .panel, .status, .loading, #suggest, .open-side {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

/* ---- buttons ---- */
.btn {
  font: inherit; font-size: 13px; font-weight: 500; color: var(--muted); background: transparent;
  border: 1px solid transparent; border-radius: 8px; height: 30px; padding: 0 10px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; white-space: nowrap;
  transition: color 0.12s, background 0.12s;
}
.btn:hover { color: var(--text); background: var(--hover); }
.btn:focus-visible, .tab:focus-visible, #q:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.btn.on { color: var(--accent); background: var(--accent-soft); }
.btn.icon { width: 30px; padding: 0; }
.seg { display: inline-flex; gap: 2px; padding: 2px; border: 1px solid var(--border); border-radius: 10px; background: rgba(255, 255, 255, 0.025); }
.seg .btn { height: 26px; border-radius: 7px; padding: 0 9px; }
.primary { color: #04121c; background: var(--accent); font-weight: 600; height: 34px; padding: 0 16px; }
.primary:hover { color: #04121c; background: #6fd6f5; }

/* ---- top bar ---- */
.bar {
  position: fixed; top: var(--gap); left: var(--gap); right: var(--gap); min-height: var(--bar-h);
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; padding: 0 10px 0 16px;
  z-index: 3;
}
.left { display: flex; align-items: baseline; gap: 14px; min-width: 0; }
.brand { font-weight: 700; font-size: 15px; letter-spacing: 0.01em; color: var(--text); text-decoration: none; }
.brand::before { content: ""; display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); vertical-align: 1px; }
#simtime { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.playback { display: flex; align-items: center; gap: 6px; }
.right { display: flex; align-items: center; justify-content: flex-end; gap: 8px; min-width: 0; }
.tools { display: flex; align-items: center; gap: 6px; }

.search { position: relative; flex: 0 1 260px; min-width: 150px; }
.search .glass { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--faint); pointer-events: none; }
.search .hint { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--faint); }
#q {
  width: 100%; height: 32px; font: inherit; font-size: 13px; color: var(--text); background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border); border-radius: 9px; padding: 0 28px 0 32px;
}
#q::placeholder { color: var(--faint); }
#q:focus + .hint { display: none; }
#suggest { position: absolute; top: calc(100% + 6px); left: 0; right: 0; margin: 0; padding: 4px; list-style: none; max-height: 320px; overflow: auto; background: var(--surface-solid); }
#suggest li { padding: 7px 9px; border-radius: 7px; cursor: pointer; display: flex; justify-content: space-between; gap: 8px; font-size: 13px; }
#suggest li:hover, #suggest li.active { background: var(--accent-soft); }
#suggest small { color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---- side panel: tabs for close approaches and layers ---- */
.side {
  position: fixed; top: calc(var(--gap) * 2 + var(--bar-h)); left: var(--gap); width: 330px;
  max-height: calc(100vh - var(--bar-h) - var(--gap) * 4 - 32px); display: flex; flex-direction: column; overflow: hidden; z-index: 2;
}
.tabs { display: flex; align-items: center; gap: 4px; padding: 8px 8px 0; border-bottom: 1px solid var(--border); }
.tab {
  font: inherit; font-size: 13px; font-weight: 600; color: var(--muted); background: none; border: 0; cursor: pointer;
  padding: 8px 8px 10px; border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tab:hover { color: var(--text); }
.tab[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }
.tabs .collapse { margin-left: auto; margin-bottom: 4px; }
.side section { overflow: auto; padding: 10px 8px 10px; }
.open-side { position: fixed; top: calc(var(--gap) * 2 + var(--bar-h)); left: var(--gap); width: 36px; height: 36px; z-index: 2; }

.lede { color: var(--muted); font-size: 12px; line-height: 1.45; margin: 2px 6px 10px; }
#approaches ol { list-style: none; margin: 0; padding: 0; }
#approaches li button {
  width: 100%; text-align: left; font: inherit; color: var(--text); background: none; border: 0; border-radius: 8px;
  padding: 8px; cursor: pointer; display: grid; grid-template-columns: 1fr auto; gap: 2px 10px;
}
#approaches li button:hover { background: var(--hover); }
#approaches li button.on { background: var(--accent-soft); }
#approaches .names { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
#approaches .km { font-variant-numeric: tabular-nums; font-weight: 600; font-size: 13px; text-align: right; }
#approaches .when { grid-column: 1 / -1; color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }

#kinds label { display: flex; align-items: center; gap: 10px; padding: 7px 6px; border-radius: 8px; cursor: pointer; font-size: 13px; }
#kinds label:hover { background: var(--hover); }
#kinds input { margin: 0; accent-color: var(--accent); }
.dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.count { margin-left: auto; color: var(--muted); font-variant-numeric: tabular-nums; }
.orbits { display: flex; gap: 4px; margin: 10px 6px 2px; }
.orbits .btn { height: 26px; padding: 0 10px; border: 1px solid var(--border); }
.orbits .btn.on { border-color: transparent; }

/* ---- selected object ---- */
.panel {
  position: fixed; top: calc(var(--gap) * 2 + var(--bar-h)); right: var(--gap); width: 310px; max-width: calc(100vw - 24px);
  max-height: calc(100vh - var(--bar-h) - var(--gap) * 4 - 32px); overflow: auto; padding: 14px 16px; font-size: 13px; z-index: 2;
}
.panel h2 { margin: 0 28px 2px 0; font-size: 16px; font-weight: 650; }
.panel .sub { color: var(--muted); margin: 0 0 12px; font-size: 12px; }
.panel dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; margin: 0; }
.panel dt { color: var(--muted); }
.panel dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.panel .close { position: absolute; top: 10px; right: 10px; }
.panel .note { color: var(--faint); font-size: 12px; margin: 12px 0 0; line-height: 1.4; }
.panel .batt { margin: 14px 0 0; padding-top: 12px; border-top: 1px solid var(--border); }
.panel .batt h3 { margin: 0 0 8px; font-size: 13px; font-weight: 650; }
.panel .batt .alert { color: var(--danger); font-weight: 600; }
.panel .batt .note { margin-top: 8px; }
.panel .batt a { color: var(--accent); }
.pair { margin: 0 0 12px; padding: 9px 11px; border-radius: 9px; background: rgba(239, 71, 111, 0.1); border: 1px solid rgba(239, 71, 111, 0.3); line-height: 1.45; }
.pair strong { color: #ff8fa8; font-weight: 600; }
.pair .countdown { display: block; margin-top: 2px; font-variant-numeric: tabular-nums; color: var(--text); font-weight: 600; }

/* ---- small things ---- */
.status {
  position: fixed; bottom: var(--gap); left: 50%; transform: translateX(-50%); padding: 5px 12px; border-radius: 999px;
  color: var(--muted); font-size: 12px; white-space: nowrap; font-variant-numeric: tabular-nums;
}
.status:empty { display: none; }
.loading { position: fixed; left: 50%; top: 50%; transform: translate(-50%, -50%); padding: 10px 16px; color: var(--muted); }
.tip { position: fixed; pointer-events: none; padding: 4px 8px; border-radius: 6px; font-size: 12px; background: rgba(0, 0, 0, 0.8); border: 1px solid var(--border); white-space: nowrap; z-index: 4; }
.label { position: fixed; left: 0; top: 0; pointer-events: none; font: 600 12px Inter, system-ui, sans-serif; text-shadow: 0 0 4px #000, 0 0 2px #000; white-space: nowrap; }
kbd { font: 11px ui-monospace, SFMono-Regular, monospace; padding: 1px 5px; border: 1px solid var(--border); border-radius: 4px; color: var(--muted); }

dialog {
  max-width: min(560px, calc(100vw - 32px)); padding: 24px 26px; color: var(--text); background: var(--surface-solid);
  border: 1px solid var(--border); border-radius: 16px; line-height: 1.55; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
dialog::backdrop { background: rgba(2, 6, 12, 0.6); backdrop-filter: blur(3px); }
dialog h2 { margin: 0 0 10px; font-size: 20px; }
dialog p, dialog ul { margin: 0 0 12px; }
dialog ul { padding-left: 20px; }
dialog li { margin-bottom: 4px; }
dialog .note { color: var(--muted); font-size: 13px; }
dialog a { color: var(--accent); text-decoration: none; }
dialog a:hover { text-decoration: underline; }
dialog .actions { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; margin-top: 18px; }
dialog form { margin: 0 0 0 auto; }

/* ---- narrow screens: bar on two rows, panels as bottom sheets ---- */
@media (max-width: 900px) {
  .bar { grid-template-columns: 1fr auto; grid-template-areas: "left tools" "play search"; padding: 8px 8px 8px 14px; row-gap: 8px; }
  .left { grid-area: left; }
  .playback { grid-area: play; }
  .right { display: contents; }
  .tools { grid-area: tools; }
  .search { grid-area: search; flex: none; width: 100%; }
  .side, .open-side, .panel { top: calc(var(--gap) * 2 + 92px); }
  .side, .panel { max-height: calc(100vh - 92px - var(--gap) * 4 - 32px); }
}
@media (max-width: 640px) {
  :root { --gap: 8px; }
  .bar { grid-template-areas: "left tools" "play play" "search search"; }
  .playback .seg .btn { padding: 0 7px; }
  .left { flex-direction: column; align-items: flex-start; gap: 2px; } /* the clock under the name, clear of Globe/Map */
  #simtime { font-size: 12px; }
  .side, .panel { top: auto; bottom: var(--gap); left: var(--gap); right: var(--gap); width: auto; max-height: 46vh; }
  .open-side { top: auto; bottom: var(--gap); }
  body:has(#panel:not([hidden])) .side, body:has(#panel:not([hidden])) .open-side { display: none; }
  .status { display: none; }
  dialog form { margin-left: 0; }
}
@media (max-width: 380px) {
  /* even stacked, the clock reaches the Globe/Map buttons: give it a row */
  .bar { grid-template-areas: "left tools" "time time" "play play" "search search"; }
  .left { display: contents; }
  .brand { grid-area: left; align-self: center; }
  #simtime { grid-area: time; }
}

/* the badge by the clock: live or not */
.timemode { display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 999px; font-size: 10.5px; font-weight: 700; letter-spacing: .05em; vertical-align: 1px; }
.timemode.live { color: #3ddc97; background: rgba(61, 220, 151, .13); }
.timemode.live::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 5px; border-radius: 50%; background: #3ddc97; vertical-align: 1px; animation: livepulse 2s infinite; }
@keyframes livepulse { 50% { opacity: .35; } }
@media (prefers-reduced-motion: reduce) { .timemode.live::before { animation: none; } }
.timemode.off { color: #ffb454; background: rgba(255, 180, 84, .14); }