:root {
  --bg: #0b1220;
  --panel: #121c2b;
  --panel-alt: #172638;
  --panel-soft: #1d2d42;
  --primary: #4ea1ff;
  --primary-strong: #1f7ae0;
  --accent: #42d6a4;
  --text: #edf6ff;
  --muted: #a7bdd5;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 10px 30px rgba(0,0,0,0.28);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #0c1220 0%, #101b2b 100%);
  color: var(--text);
}

body {
  min-height: 100vh;
}

button, input {
  font: inherit;
}

.app-shell {
  display: flex;
  height: 100vh;
  width: 100vw;
}

.sidebar {
  width: 300px;
  background: rgba(15, 25, 38, 0.96);
  border-right: 1px solid var(--border);
  padding: 22px 18px;
  backdrop-filter: blur(6px);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  box-shadow: var(--shadow);
}

.brand-title {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.74rem;
}

.panel-section {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 12px;
  margin-bottom: 16px;
}

.section-label {
  margin: 0 0 12px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.button-group {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.tool-btn,
.action-btn,
#searchBtn {
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.02);
  color: var(--text);
  border-radius: 10px;
  padding: 9px 10px;
  cursor: pointer;
  transition: 180ms ease;
}

.tool-btn:hover,
.action-btn:hover,
#searchBtn:hover {
  border-color: rgba(78,161,255,0.4);
  transform: translateY(-1px);
}

.tool-btn.active {
  background: linear-gradient(135deg, rgba(78,161,255,0.25), rgba(66,214,164,0.22));
  border-color: rgba(78,161,255,0.6);
}

.layer-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0;
  color: var(--text);
}

.layer-toggle input {
  accent-color: var(--primary);
}

.search-box {
  display: flex;
  gap: 8px;
}

.search-box input {
  flex: 1;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
}

.search-box input::placeholder {
  color: var(--muted);
}

.control-select {
  width: 100%;
  padding: 10px 12px;
  color: var(--text);
  background: #172638;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.control-select option {
  background: #172638;
  color: var(--text);
}

.stats-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 6px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--muted);
}

.stat-row strong {
  color: var(--text);
}

.main-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(12, 19, 29, 0.92);
}

.topbar-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.topbar h1 {
  margin: 4px 0 0;
  font-size: clamp(1.4rem, 2vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.topbar-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.connection-status {
  align-self: center;
  padding: 7px 10px;
  border: 1px solid rgba(66, 214, 164, 0.35);
  border-radius: 999px;
  color: #9ff0d4;
  background: rgba(66, 214, 164, 0.08);
  font-size: 0.74rem;
  white-space: nowrap;
}

.connection-status.offline {
  color: #ffd18b;
  border-color: rgba(255, 183, 3, 0.38);
  background: rgba(255, 183, 3, 0.08);
}

.action-btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  border-color: rgba(78,161,255,0.7);
}

.action-btn.secondary {
  background: rgba(255,255,255,0.02);
}

#map {
  width: 100%;
  height: 100%;
  min-height: 420px;
}

.map-wrapper {
  position: relative;
  flex: 1;
  min-height: 420px;
}

.app-status {
  position: absolute;
  top: 16px;
  left: 50%;
  z-index: 600;
  max-width: min(460px, calc(100% - 32px));
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  background: rgba(16, 27, 43, 0.94);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -8px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.app-status.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.app-status.error {
  border-color: rgba(255, 107, 107, 0.65);
}

.leaflet-container {
  background: #dfeaf7;
}

.leaflet-container.map-add-point {
  cursor: crosshair;
}

.leaflet-popup-content-wrapper,
.leaflet-popup-tip {
  background: #101b2b;
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.06);
}

.custom-popup .popup-title {
  font-weight: 700;
  margin-bottom: 8px;
}

.custom-popup .popup-meta {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.8rem;
}

@media (max-width: 860px) {
  .app-shell {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .topbar {
    padding: 16px 18px 12px;
    gap: 12px;
    flex-wrap: wrap;
  }
}