:root {
  --void: #07111d;
  --rail: #0a1628;
  --well: #0d1c33;
  --ice: #e7f3ff;
  --mist: #9db4d4;
  --cyan: #5ad6ff;
  --teal: #3ed9b0;
  --violet: #b08cff;
  --orchid: #d59bff;
  --line: #27405f;
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  height: 100%;
  margin: 0;
}

html {
  color-scheme: dark;
}

body {
  background:
    radial-gradient(1200px 480px at 80% -10%, rgba(176, 140, 255, 0.16), transparent 55%),
    radial-gradient(900px 420px at -10% 110%, rgba(62, 217, 176, 0.1), transparent 50%),
    var(--void);
  color: var(--ice);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
}

#app {
  display: grid;
  grid-template-columns: 320px 1fr;
}

.rail {
  background:
    linear-gradient(180deg, rgba(90, 214, 255, 0.06), transparent 28%),
    linear-gradient(180deg, #0e1c34, var(--rail));
  border-right: 1px solid var(--line);
  padding: 1.25rem 1rem 2rem;
  overflow: auto;
}

.brand {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.beacon {
  width: 0.7rem;
  height: 1.6rem;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
  box-shadow: 0 0 18px rgba(90, 214, 255, 0.55);
}

.wordmark {
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 800;
  font-size: 2rem;
  letter-spacing: 0.04em;
  margin: 0;
  line-height: 0.9;
}

.tag {
  margin: 0;
  color: var(--mist);
  font-size: 0.8rem;
}

.panel {
  margin-top: 1.25rem;
}

.panel h2,
.panel-head h2 {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  margin: 0 0 0.6rem;
  color: var(--cyan);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.muted {
  color: var(--mist);
  font-size: 0.85rem;
}

#summary-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, auto);
  gap: 0.28rem 0.8rem;
  margin: 0;
  font-size: 0.85rem;
  min-width: 0;
}

#summary-list dt {
  color: var(--mist);
}

#summary-list dd {
  margin: 0;
  text-align: right;
  font-variant-numeric: tabular-nums;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 11rem;
}

button,
.upload,
a.btn {
  background: linear-gradient(180deg, #7ae7ff, var(--cyan));
  color: #04202c;
  border: 0;
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

button:hover,
.upload:hover,
a.btn:hover {
  filter: brightness(1.08);
}

button.ghost {
  background: transparent;
  color: var(--ice);
  border: 1px solid var(--violet);
}

button.ghost:hover {
  background: rgba(176, 140, 255, 0.12);
  filter: none;
}

button:focus-visible,
.upload:focus-visible,
a.btn:focus-visible,
input:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.upload input {
  display: none;
}

.session-tree,
.session-tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.session-tree ul {
  padding-left: 0.55rem;
}

.session-tree li.group {
  padding: 0;
  border: 0;
  cursor: default;
}

.session-tree .group-head {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--cyan);
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 0.4rem 0.15rem;
  font-size: 0.95rem;
  cursor: pointer;
  filter: none;
}

.session-tree .group-head:hover {
  filter: none;
  color: var(--ice);
}

.session-tree .chev {
  width: 0.38rem;
  height: 0.38rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  flex: 0 0 auto;
}

.session-tree .group:not(.collapsed) > .group-head .chev {
  transform: rotate(45deg);
}

.session-tree .group-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-tree .group.date > .group-head,
.session-tree .group.driver > .group-head {
  color: var(--mist);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

.session-tree .group.collapsed > ul {
  display: none;
}

.session-tree li.file {
  padding: 0.45rem 0.35rem;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.session-tree li.file:hover {
  background: rgba(90, 214, 255, 0.06);
}

.session-tree li.file.active {
  background: rgba(176, 140, 255, 0.12);
  box-shadow: inset 3px 0 0 var(--teal);
}

.session-tree small {
  display: block;
  color: var(--mist);
}

#lap-count {
  letter-spacing: 0;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-weight: 400;
  text-transform: none;
}

.lap-picks {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0 0 0.65rem;
}

.lap-picks button {
  background: transparent;
  color: var(--mist);
  border: 1px solid var(--line);
  padding: 0.2rem 0.55rem;
  font-size: 0.85rem;
}

.lap-picks button:hover {
  color: var(--ice);
  border-color: var(--cyan);
  filter: none;
}

.lap-picks button.active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(90, 214, 255, 0.12);
}

#lap-list label {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.25rem 0;
  font-variant-numeric: tabular-nums;
  min-width: 0;
  width: 100%;
}

#lap-list label.invalid {
  color: var(--mist);
  opacity: 0.7;
}

#lap-list label.best .lap-meta {
  color: var(--teal);
}

#lap-list .badge {
  flex: 0 0 auto;
  font-family: "Barlow Condensed", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--teal);
}

#lap-list input {
  accent-color: var(--teal);
}

.stage {
  display: grid;
  grid-template-rows: 1fr 132px;
  min-width: 0;
  position: relative;
}

.map-legend {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  z-index: 500;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.85rem;
  padding: 0.4rem 0.65rem;
  background: rgba(7, 17, 29, 0.82);
  border: 1px solid var(--line);
  color: var(--mist);
  font-size: 0.75rem;
  pointer-events: none;
}

.map-legend span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.map-legend .swatch {
  width: 0.7rem;
  height: 0.25rem;
  display: inline-block;
}

.map-legend .swatch.slow {
  background: #ff5b6e;
}

.map-legend .swatch.fast {
  background: #3ed9b0;
}

.map-legend .swatch.best {
  background: #c084fc;
}

#map {
  background: #071018;
}

.dash {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) 2fr;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: linear-gradient(180deg, #0c1730, #091324);
  border-top: 1px solid var(--line);
  align-items: center;
}

.stat span {
  display: block;
  color: var(--mist);
  font-size: 0.75rem;
}

.stat strong {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ice);
}

.stat:nth-child(1) strong {
  color: var(--cyan);
}

.stat:nth-child(2) strong {
  color: var(--teal);
}

.stat:nth-child(3) strong {
  color: var(--violet);
}

.stat:nth-child(4) strong {
  color: var(--orchid);
}

#spark {
  width: 100%;
  height: 88px;
}

.leaflet-container {
  background: #071018;
  font-family: inherit;
}

.leaflet-tile-pane {
  filter: invert(1) hue-rotate(195deg) saturate(0.5) brightness(0.78) contrast(1.05);
}

.leaflet-control-zoom a {
  background: var(--well) !important;
  color: var(--ice) !important;
  border-color: var(--line) !important;
}

.leaflet-bar {
  border: 1px solid var(--line) !important;
  box-shadow: none !important;
}

.leaflet-control-attribution {
  background: rgba(7, 17, 29, 0.82) !important;
  color: var(--mist) !important;
}

.leaflet-control-attribution a {
  color: var(--cyan) !important;
}

@media (max-width: 900px) {
  #app {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
  .rail {
    max-height: 55vh;
  }
  .dash {
    grid-template-columns: 1fr 1fr;
  }
  .map-legend {
    top: 0.5rem;
    right: 0.5rem;
    left: 3.2rem;
    font-size: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  button,
  .upload,
  a.btn {
    transition: none;
  }
}