:root {
  --bg: #0b1526;
  --panel: #0f1c32;
  --card: #121f36;
  --border: #1f2c44;
  --muted: #93a4c6;
  --text: #e6eeff;
  --accent: #5ad0ff;
  --accent-strong: #7cf3c5;
  --warning: #f5a524;
  --error: #f07178;
  --optional: #8b9db8;
  --shadow: 0 10px 40px rgba(0,0,0,0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at 20% 20%, rgba(90,208,255,0.08), transparent 25%),
              radial-gradient(circle at 80% 10%, rgba(124,243,197,0.10), transparent 22%),
              radial-gradient(circle at 60% 70%, rgba(90,208,255,0.05), transparent 30%),
              var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
}

.app { position: relative; min-height: 100vh; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(10px);
  background: rgba(11,21,38,0.75);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}
.title { font-size: 18px; font-weight: 700; }
.sub { color: var(--muted); font-size: 13px; line-height: 1.5; margin-top: 4px; }
.actions { display: flex; gap: 10px; flex-shrink: 0; flex-wrap: wrap; }

button {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 12px;
  cursor: pointer;
  transition: all .15s ease;
  font-weight: 600;
}
button:hover { border-color: var(--accent); color: #fff; }
button:disabled { opacity: .65; cursor: not-allowed; }
button.primary { background: linear-gradient(135deg, #4cb8ff, #7cf3c5); color: #0b1526; border: none; }
button.primary:hover { filter: brightness(1.05); }
button.ghost { background: transparent; }

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  min-height: calc(100vh - 72px);
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 14px 14px 90px;
  background: linear-gradient(180deg, rgba(18,31,54,0.9), rgba(18,31,54,0.75));
  overflow: auto;
}
.list { display: flex; flex-direction: column; gap: 10px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  box-shadow: var(--shadow);
  transition: border-color .15s ease, transform .15s ease, background .15s ease;
  cursor: pointer;
}
.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.card.active { border-color: var(--accent); background: rgba(90,208,255,0.06); }
.card.optional { border-style: dashed; border-color: var(--optional); }

.card-head {
  display: flex; align-items: center; gap: 8px; justify-content: space-between; flex-wrap: wrap;
}
.card-title { font-weight: 700; font-size: 14px; }
.badges { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.badge {
  font-size: 11px; padding: 3px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); background: rgba(255,255,255,0.03);
}
.badge.primary { border-color: var(--accent); color: #aee9ff; }
.badge.optional { border-color: var(--optional); color: var(--optional); }
.meta { color: var(--muted); font-size: 12px; margin-top: 6px; }

.footer { margin-top: 14px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.footer a { color: var(--accent); }

.map-wrap { position: relative; background: #0c1424; }
.map { width: 100%; height: calc(100vh - 72px); }

.route-status {
  position: absolute;
  bottom: 14px; left: 14px; right: 14px;
  padding: 10px 12px;
  background: rgba(15,28,50,0.9);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--muted);
  font-size: 13px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s ease;
}
.route-status.show { opacity: 1; }
.route-status.error { color: var(--error); border-color: rgba(240,113,120,0.6); }
.route-status.warn { color: var(--warning); border-color: rgba(245,165,36,0.6); }

.loader {
  position: fixed; inset: 0; display: grid; place-items: center;
  background: rgba(7,12,22,0.72);
  z-index: 10;
  backdrop-filter: blur(8px);
}
.loader-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
  display: flex; align-items: center; gap: 12px;
}
.spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid var(--accent); border-bottom-color: transparent;
  animation: spin 0.8s linear infinite;
}
.loader-text { color: var(--muted); font-size: 13px; }

@keyframes spin { to { transform: rotate(360deg); } }

.leaflet-popup-content-wrapper {
  background: var(--card);
  color: var(--text);
  border-radius: 12px;
  border: 1px solid var(--border);
}
.leaflet-popup-tip { background: var(--card); }
.popup-title { font-weight: 700; font-size: 14px; margin-bottom: 4px; }
.popup-meta { color: var(--muted); font-size: 12px; margin-bottom: 8px; display: flex; gap: 6px; flex-wrap: wrap; }
.popup-list { padding-left: 18px; margin: 0 0 10px; color: var(--text); }
.popup-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-mini {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 12px;
  cursor: pointer;
}
.btn-mini:hover { border-color: var(--accent); }

.marker-bubble {
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 50%;
  color: #0b1526;
  font-weight: 800;
  font-size: 13px;
  border: 2px solid #fff;
  box-shadow: 0 6px 18px rgba(0,0,0,0.35);
}
.marker-bubble.main { background: linear-gradient(135deg, #4cb8ff, #7cf3c5); }
.marker-bubble.opt { background: linear-gradient(135deg, #c6cee0, #8ea3c7); }

.locate-on { border-color: var(--accent); color: #aee9ff; }
.locate-marker { filter: drop-shadow(0 4px 10px rgba(0,0,0,0.4)); }
.locate-accuracy { opacity: 0.35; }

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; grid-template-rows: 48vh 52vh; }
  .map { height: 48vh; }
  .sidebar {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    height: 50vh;
    border-right: none;
    border-top: 1px solid var(--border);
    border-radius: 14px 14px 0 0;
    box-shadow: 0 -12px 40px rgba(0,0,0,0.35);
    transform: translateY(0);
    background: rgba(18,31,54,0.95);
  }
  .sidebar::before {
    content: ""; width: 40px; height: 4px; border-radius: 999px;
    background: var(--border);
    position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
  }
  .sidebar { padding-top: 20px; }
  .topbar { flex-direction: column; align-items: flex-start; gap: 10px; }
  .actions { width: 100%; justify-content: flex-start; }
}