:root {
  --primary: #1B74C5;
  --primary-dark: #0d4f8b;
  --primary-light: #6BB0E5;
  --bg: #f4f7fb;
  --sidebar-bg: #ffffff;
  --text: #2c3e50;
  --text-muted: #6c757d;
  --border: #e2e8f0;
  --accent: #28a73a;
  --danger: #e74c3c;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 20px rgba(27,116,197,0.15);
  --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', 'Open Sans', Tahoma, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
}

#app { display: flex; height: 100vh; }

/* ─── Sidebar ─── */
#sidebar {
  width: 340px;
  min-width: 340px;
  background: var(--sidebar-bg);
  box-shadow: 2px 0 12px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 1000;
  transition: transform 0.3s ease;
}

.sidebar-header {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 20px 16px;
}
.sidebar-header h1 { font-size: 1.3rem; font-weight: 700; }
.sidebar-header .subtitle { font-size: 0.82rem; opacity: 0.85; margin-top: 4px; }

.search-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.search-section h3 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group { margin-bottom: 10px; }
.form-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.form-control {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 0.9rem;
  background: #fff;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(27,116,197,0.12);
}
.form-row { display: flex; gap: 8px; }
.form-group.half { flex: 1; }

/* ─── Buttons ─── */
.btn {
  border: none;
  border-radius: 7px;
  padding: 9px 14px;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.btn-block { width: 100%; margin-top: 4px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
  background: #e8f1f8;
  color: var(--primary-dark);
}
.btn-secondary:hover { background: #d0e3f0; }
.btn-tool, .btn-layer {
  background: #f0f5fa;
  color: var(--text);
  font-size: 0.8rem;
  padding: 7px 10px;
}
.btn-tool:hover, .btn-layer:hover { background: #e0ebf5; }
.btn-layer.active {
  background: var(--primary);
  color: #fff;
}
.btn-download, .btn-share {
  background: #f0f5fa;
  color: var(--primary-dark);
  font-size: 0.8rem;
  padding: 6px 10px;
  flex: 1;
}
.btn-download:hover, .btn-share:hover { background: #e0ebf5; }

.tool-buttons, .layer-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.layer-buttons { grid-template-columns: 1fr; }
.layer-buttons .btn-layer { text-align: left; }

.hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-style: italic;
}

.sidebar-footer {
  margin-top: auto;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.sidebar-footer a { color: var(--primary); text-decoration: none; }
.version { opacity: 0.5; }

/* ─── Map ─── */
#map {
  flex: 1;
  height: 100vh;
  z-index: 1;
}

/* ─── Parcel Panel ─── */
.parcel-panel {
  position: absolute;
  top: 60px;
  right: 16px;
  width: 380px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  border: 1px solid var(--border);
}
.parcel-panel.hidden { display: none; }

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: 14px 14px 0 0;
  color: #fff;
}
.panel-header h2 { font-size: 1.05rem; font-weight: 700; }
.btn-close {
  background: rgba(255,255,255,0.2);
  border: none;
  color: #fff;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.btn-close:hover { background: rgba(255,255,255,0.35); }

.panel-body { padding: 14px 18px; }
.panel-body table { width: 100%; border-collapse: collapse; }
.panel-body td {
  padding: 7px 0;
  border-bottom: 1px solid #f0f5fa;
  font-size: 0.88rem;
}
.panel-body td:first-child {
  font-weight: 600;
  color: var(--text-muted);
  width: 40%;
}
.panel-body td:last-child { color: var(--text); }

.panel-actions, .panel-share {
  display: flex;
  gap: 6px;
  padding: 0 18px 8px;
  flex-wrap: wrap;
}
.panel-share { padding-bottom: 14px; }

.panel-coords {
  padding: 0 18px 16px;
  max-height: 200px;
  overflow-y: auto;
}
.panel-coords h4 {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.panel-coords table { width: 100%; font-size: 0.8rem; }
.panel-coords td {
  padding: 3px 6px;
  border-bottom: 1px dotted var(--border);
  font-family: 'Consolas', monospace;
}
.panel-coords td:first-child { color: var(--text-muted); width: 30px; }

/* ─── Loading ─── */
.loading-overlay {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9999;
  background: rgba(255,255,255,0.95);
  padding: 24px 32px;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}
.loading-overlay .spinner {
  width: 40px; height: 40px;
  border: 4px solid #e2e8f0;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 10px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay p { font-size: 0.9rem; color: var(--text-muted); }

/* ─── Toast ─── */
.toast {
  position: absolute;
  bottom: 20px; left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.86rem;
  z-index: 10000;
  opacity: 0;
  transition: opacity 0.3s, bottom 0.3s;
  pointer-events: none;
}
.toast.show { opacity: 1; bottom: 30px; }
.toast.error { background: var(--danger); }
.toast.success { background: var(--accent); }

/* ─── Mobile ─── */
.sidebar-toggle {
  display: none;
  position: absolute;
  top: 12px; left: 12px;
  z-index: 1001;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 40px; height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow);
}

@media (max-width: 768px) {
  #sidebar {
    position: absolute;
    left: 0; top: 0;
    height: 100vh;
    transform: translateX(-100%);
    box-shadow: 4px 0 20px rgba(0,0,0,0.15);
  }
  #sidebar.open { transform: translateX(0); }
  .sidebar-toggle { display: block; }
  .parcel-panel {
    width: calc(100vw - 24px);
    right: 12px;
    top: 50px;
  }
  .form-row { flex-direction: row; }
}

/* Leaflet overrides */
.leaflet-control-attribution {
  font-size: 0.7rem;
  background: rgba(255,255,255,0.8);
}
.leaflet-bar a {
  border-radius: 4px !important;
}
.leaflet-draw.leaflet-control-toolbar .leaflet-draw-toolbar a {
  border-radius: 4px !important;
}