:root {
  --brand: #5d4037;
  --brand-light: #8d6e63;
  --panel-bg: #fafafa;
  --border: #d7ccc8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: #2b2b2b;
}

#app-bar {
  display: flex;
  align-items: center;
  gap: .6rem;
  height: 52px;
  padding: 0 .6rem;
  background: var(--brand);
  color: #fff;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1200;
}

#app-bar h1 {
  font-size: 1.05rem;
  margin: 0;
  flex: 1;
  text-align: center;
}

#app-bar button {
  background: rgba(255,255,255,.15);
  border: none;
  color: #fff;
  padding: .4rem .6rem;
  border-radius: 6px;
  font-size: .9rem;
  cursor: pointer;
}
#app-bar button:hover { background: rgba(255,255,255,.28); }

#map {
  position: fixed;
  top: 52px; bottom: 0; left: 0; right: 0;
  z-index: 1;
}

#panel {
  position: fixed;
  top: 52px; bottom: 0; left: 0;
  width: 300px;
  max-width: 86vw;
  background: var(--panel-bg);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  z-index: 1100;
  transform: translateX(-100%);
  transition: transform .2s ease;
  padding-bottom: 1rem;
}
#panel.open { transform: translateX(0); }

.panel-section {
  padding: .8rem 1rem;
  border-bottom: 1px solid var(--border);
}
.panel-section h2 {
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--brand);
  margin: 0 0 .5rem;
}
.panel-section select,
.panel-section input[type="file"] {
  width: 100%;
  padding: .4rem;
  font-size: .9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}
.checkbox-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
  cursor: pointer;
}
.checkbox-row input {
  width: auto;
}
.track-info-inline {
  margin-top: .4rem;
  font-size: .78rem;
  color: #555;
  min-height: 1em;
}

#imported-list {
  margin-top: .5rem;
  font-size: .82rem;
}
#imported-list .imported-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  padding: .3rem 0;
  border-bottom: 1px dashed var(--border);
}
#imported-list button {
  border: 1px solid #b71c1c;
  color: #b71c1c;
  background: #fff;
  border-radius: 5px;
  padding: .15rem .5rem;
  font-size: .75rem;
  cursor: pointer;
}
.panel-section label {
  display: block;
  font-size: .8rem;
  margin-top: .6rem;
  color: #555;
}
.panel-section input[type="range"] {
  width: 100%;
}

.hint {
  margin-top: .5rem;
  font-size: .72rem;
  color: #777;
  line-height: 1.35;
}

.track-info {
  margin-top: .6rem;
  font-size: .85rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .5rem;
  line-height: 1.4;
}

#btn-clear-track {
  margin-top: .6rem;
  width: 100%;
  padding: .5rem;
  border: 1px solid #b71c1c;
  color: #b71c1c;
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
}
#btn-clear-track:disabled {
  opacity: .4;
  cursor: not-allowed;
}

.credits {
  font-size: .72rem;
  color: #777;
  line-height: 1.4;
}
.credits code { font-size: .7rem; }

#legend-panel {
  position: fixed;
  top: 62px;
  right: 10px;
  width: 280px;
  max-width: 80vw;
  max-height: 70vh;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(0,0,0,.25);
  z-index: 1150;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
#legend-panel[hidden] {
  display: none;
}
#legend-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem .7rem;
  background: var(--brand-light);
  color: #fff;
  font-size: .85rem;
}
#legend-header button {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}
#legend-body {
  padding: .6rem;
  overflow: auto;
}
#legend-body img {
  max-width: 100%;
  display: block;
}
#legend-empty {
  font-size: .82rem;
  color: #666;
  margin: 0;
}

.leaflet-popup-content { font-size: .85rem; }