/* Theme variables */
:root {
  --bg-color: #0d47a1;
  --panel-bg: rgba(255, 255, 255, 0.96);
  --panel-text: #222;
  --panel-header: #0d47a1;
  --muted-text: #555;
  --input-border: #ccc;
  --input-bg: #fff;
  --btn-primary-bg: #0d47a1;
  --btn-primary-text: #fff;
  --btn-secondary-bg: #fff;
  --btn-secondary-text: #0d47a1;
  --btn-secondary-border: #0d47a1;
  --shadow: rgba(0, 0, 0, 0.2);
  --depth-label-bg: rgba(255, 255, 255, 0.9);
  --depth-label-text: #222;
  --depth-label-border: rgba(0, 0, 0, 0.2);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #1e1e2e;
    --panel-bg: rgba(55, 55, 65, 0.96);
    --panel-text: #ffffff;
    --panel-header: #90caf9;
    --muted-text: #d0d0d0;
    --input-border: #777;
    --input-bg: #404050;
    --btn-primary-bg: #1e88e5;
    --btn-primary-text: #fff;
    --btn-secondary-bg: transparent;
    --btn-secondary-text: #90caf9;
    --btn-secondary-border: #90caf9;
    --shadow: rgba(0, 0, 0, 0.45);
    --depth-label-bg: rgba(55, 55, 65, 0.95);
    --depth-label-text: #ffffff;
    --depth-label-border: rgba(255, 255, 255, 0.25);
  }
}

/* Reset and base */
* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-color);
  color: var(--panel-text);
}

#app {
  position: relative;
  height: 100%;
  width: 100%;
}

/* Full-screen Leaflet map */
#map {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* Panels */
.panel {
  position: absolute;
  background: var(--panel-bg);
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 4px 16px var(--shadow);
  z-index: 1000;
  backdrop-filter: blur(6px);
  color: var(--panel-text);
}

/* Legend */
#legend {
  top: 16px;
  left: 16px;
  font-size: 13px;
  min-width: 120px;
}

#legend strong {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--panel-text);
}

#legend .legend-section {
  margin-top: 12px;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(128, 128, 128, 0.4);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0;
}

.legend-color {
  width: 18px;
  height: 3px;
  border-radius: 2px;
}

/* Depth contour labels */
.depth-label {
  background: var(--depth-label-bg);
  border: 1px solid var(--depth-label-border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 11px;
  font-weight: 700;
  color: var(--depth-label-text);
  box-shadow: 0 1px 3px var(--shadow);
  white-space: nowrap;
}

.depth-label:before {
  display: none;
}

/* Floating action buttons */
.fab {
  position: absolute;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}

.fab:active {
  transform: scale(0.92);
}

.fab svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

#add-poi-btn {
  bottom: 24px;
  background: #e91e63;
}

#add-poi-btn.active {
  background: #ad1457;
  animation: pulse-pink 1.2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(13, 71, 161, 0.6); }
  70% { box-shadow: 0 0 0 14px rgba(13, 71, 161, 0); }
  100% { box-shadow: 0 0 0 0 rgba(13, 71, 161, 0); }
}

@keyframes pulse-pink {
  0% { box-shadow: 0 0 0 0 rgba(233, 30, 99, 0.6); }
  70% { box-shadow: 0 0 0 14px rgba(233, 30, 99, 0); }
  100% { box-shadow: 0 0 0 0 rgba(233, 30, 99, 0); }
}

/* GPS panel */
#gps-panel {
  bottom: 96px;
  right: 24px;
  width: min(calc(100vw - 48px), 280px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

#gps-panel.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  font-size: 16px;
  color: var(--panel-header);
}

#close-poi-panel {
  background: none;
  border: none;
  font-size: 24px;
  line-height: 1;
  color: var(--muted-text);
  cursor: pointer;
  padding: 0 4px;
}

#gps-status {
  font-size: 14px;
  color: var(--muted-text);
  line-height: 1.4;
}

#gps-data {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.coord-row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
}

.coord-row span {
  color: var(--muted-text);
}

.coord-row strong {
  font-weight: 600;
  color: var(--panel-text);
}

#center-map,
.button {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

#center-map:active,
.button:active {
  filter: brightness(1.15);
}

.button.secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border: 2px solid var(--btn-secondary-border);
}

.button.secondary:active {
  background: rgba(144, 202, 249, 0.15);
}

/* POI panel & form */
#poi-panel {
  bottom: 96px;
  right: 24px;
  width: min(calc(100vw - 48px), 280px);
  max-height: calc(100vh - 180px);
  overflow-y: auto;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

#poi-panel.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
}

#poi-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#poi-form label {
  font-size: 13px;
  color: var(--muted-text);
  margin-top: 4px;
}

#poi-form input,
#poi-form select,
#poi-form textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--input-border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  background: var(--input-bg);
  color: var(--panel-text);
}

#poi-form textarea {
  resize: vertical;
}

#poi-form button {
  margin-top: 6px;
}

#poi-form button.primary,
#poi-form button[type="submit"] {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: none;
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

#poi-form button.secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border: 2px solid var(--btn-secondary-border);
  border-radius: 10px;
  padding: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

#poi-form button:active {
  filter: brightness(1.15);
}

/* Icon picker */
.icon-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.icon-option {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  border: 2px solid var(--input-border);
  background: var(--input-bg);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.icon-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.icon-option span {
  font-size: 20px;
  line-height: 1;
}

.icon-option:has(input:checked) {
  border-color: var(--btn-primary-bg);
  background: rgba(30, 136, 229, 0.15);
}

/* Show-name checkbox */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0 12px;
  cursor: pointer;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--btn-primary-bg);
}

.checkbox-row span {
  font-size: 14px;
  color: var(--panel-text);
}

/* POI markers and labels */
.poi-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel-bg);
  border-radius: 50%;
  border: 2px solid var(--panel-header);
  font-size: 16px;
  line-height: 1;
  box-shadow: 0 2px 6px var(--shadow);
}

.poi-label {
  background: var(--panel-bg);
  border: 1px solid var(--depth-label-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--panel-text);
  box-shadow: 0 1px 3px var(--shadow);
  white-space: nowrap;
}

/* Popup action buttons */
.popup-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.popup-actions button {
  flex: 1;
  padding: 5px 8px;
  border: none;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
  color: #fff;
}

.popup-actions .edit-poi {
  background: #0d47a1;
}

.popup-actions .delete-poi {
  background: #d32f2f;
}

/* Crosshair for map tapping mode */
#map.tap-mode {
  cursor: crosshair;
}

/* Hide depth labels when zoomed out */
.hide-depth-labels .depth-label {
  display: none !important;
}

.hidden {
  display: none !important;
}

/* Safe-area for notched phones */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  #add-poi-btn {
    bottom: calc(24px + env(safe-area-inset-bottom));
  }

  #gps-panel,
  #poi-panel {
    bottom: calc(96px + env(safe-area-inset-bottom));
  }
}