:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: rgba(17, 24, 39, .96);
  --panel-2: #1f2937;
  --panel-3: #273449;
  --text: #f9fafb;
  --muted: #9ca3af;
  --border: rgba(255,255,255,.08);
  --accent: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow: 0 20px 50px rgba(0,0,0,.35);
  --topbar-h: 64px;
  --left-w: 320px;
  --right-w: 360px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #eef2f7;
  --panel: rgba(255,255,255,.97);
  --panel-2: #f8fafc;
  --panel-3: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --border: rgba(17,24,39,.10);
  --shadow: 0 20px 50px rgba(17,24,39,.15);
}

* { box-sizing: border-box; }

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

button, input { font: inherit; }

button { cursor: pointer; }

.hidden { display: none !important; }

.app-shell {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: var(--left-w) 1fr var(--right-w);
  grid-template-rows: var(--topbar-h) 1fr;
}

.topbar {
  grid-column: 1 / 4;
  display: grid;
  grid-template-columns: var(--left-w) minmax(280px, 640px) 1fr;
  align-items: center;
  gap: 18px;
  padding: 0 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  z-index: 1200;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
}
.brand-mark {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #16a34a);
  color: white;
  font-size: 20px;
}
.brand div { display:flex; flex-direction:column; }
.brand strong { font-size: 18px; }
.brand span:last-child { font-size: 12px; color: var(--muted); }

.search-wrap { position: relative; }
.search-wrap input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-2);
  color: var(--text);
  padding: 0 14px;
  outline: none;
}
.search-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34,197,94,.15);
}

.search-results {
  position: absolute;
  left: 0; right: 0; top: 48px;
  max-height: 360px;
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  z-index: 2000;
}

.search-item {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  text-align: left;
  padding: 12px 14px;
}
.search-item:last-child { border-bottom: 0; }
.search-item:hover { background: var(--panel-2); }
.search-item strong, .search-item span { display:block; }
.search-item span { font-size: 12px; color: var(--muted); margin-top: 3px; }

.top-actions {
  justify-self: end;
  display: flex;
  gap: 8px;
}

.icon-button {
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--panel-2);
  color: var(--text);
  font-size: 20px;
}
.icon-button:hover { background: var(--panel-3); }

.panel {
  background: var(--panel);
  overflow: auto;
  z-index: 900;
}

.left-panel {
  border-right: 1px solid var(--border);
}

.right-panel {
  border-left: 1px solid var(--border);
  padding: 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-grid article {
  background: var(--panel);
  padding: 16px;
}
.stats-grid span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 4px;
}
.stats-grid strong {
  font-size: 21px;
}

.panel-section {
  padding: 18px;
  border-bottom: 1px solid var(--border);
}
.section-title-row {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap: 12px;
  margin-bottom: 14px;
}
.section-title-row h2 {
  margin: 0;
  font-size: 15px;
}
.text-button {
  border: 0;
  color: var(--accent);
  background: transparent;
}
.badge {
  min-width: 28px;
  padding: 3px 8px;
  border-radius: 999px;
  text-align: center;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 12px;
}

.field {
  display:grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  margin-bottom: 18px;
}
.field span {
  font-size: 13px;
}
.field input { grid-column: 1 / 3; width: 100%; }
.field output {
  color: var(--muted);
  font-size: 12px;
}

.check-row {
  display:flex;
  align-items:center;
  gap: 9px;
  font-size: 13px;
}

.aircraft-list-section { padding-bottom: 8px; }
.aircraft-list {
  display:flex;
  flex-direction:column;
  gap: 7px;
}
.aircraft-row {
  width: 100%;
  display:grid;
  grid-template-columns: 40px 1fr auto;
  align-items:center;
  gap: 10px;
  padding: 10px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: var(--panel-2);
  color: var(--text);
  text-align:left;
}
.aircraft-row:hover,
.aircraft-row.active {
  border-color: rgba(34,197,94,.45);
  background: var(--panel-3);
}
.aircraft-row-icon {
  width: 38px; height: 38px;
  display:grid; place-items:center;
  border-radius: 50%;
  background: rgba(34,197,94,.12);
  color: var(--accent);
  transform-origin: center;
}
.aircraft-row strong { display:block; font-size: 14px; }
.aircraft-row small { color: var(--muted); }
.aircraft-row .right { text-align:right; }

.map-wrap { position: relative; min-width: 0; }
#map { width: 100%; height: 100%; background: #111827; }

.map-status {
  position:absolute;
  left: 14px;
  bottom: 14px;
  z-index: 700;
  padding: 8px 11px;
  border-radius: 10px;
  background: var(--panel);
  box-shadow: var(--shadow);
  color: var(--muted);
  font-size: 12px;
}

.connection-banner {
  position:absolute;
  top: 14px;
  left: 50%;
  transform:translateX(-50%);
  z-index: 800;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--danger);
  color:white;
  box-shadow: var(--shadow);
  font-size: 13px;
}

.empty-detail {
  height:100%;
  display:grid;
  place-content:center;
  text-align:center;
  color:var(--muted);
}
.empty-plane { font-size: 48px; color: var(--accent); }
.empty-detail h2 { color:var(--text); margin:10px 0 4px; }
.empty-detail p { margin:0; }

.detail-header {
  display:flex;
  justify-content:space-between;
  gap: 16px;
  align-items:flex-start;
}
.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 700;
  font-size: 12px;
}
.detail-header h1 {
  margin: 4px 0 2px;
  font-size: 30px;
}
.detail-header p {
  margin: 0;
  color: var(--muted);
}

.detail-metrics {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap: 10px;
  margin: 22px 0;
}
.detail-metrics article {
  padding: 13px;
  border-radius: 12px;
  background: var(--panel-2);
}
.detail-metrics span {
  display:block;
  color:var(--muted);
  font-size:12px;
  margin-bottom:5px;
}
.detail-metrics strong { font-size:16px; }

.detail-list {
  margin:0;
  border-top:1px solid var(--border);
}
.detail-list div {
  display:grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 12px;
  padding: 11px 0;
  border-bottom:1px solid var(--border);
}
.detail-list dt { color:var(--muted); }
.detail-list dd { margin:0; text-align:right; word-break:break-word; }

.detail-actions {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
  margin-top:18px;
}
.primary-button,
.secondary-button {
  min-height:42px;
  border-radius:11px;
  border:1px solid var(--border);
  font-weight:700;
}
.primary-button {
  background:var(--accent);
  color:#052e16;
}
.secondary-button {
  background:var(--panel-2);
  color:var(--text);
}

.layer-menu {
  position:fixed;
  top:58px;
  right:18px;
  z-index:2200;
  width:190px;
  padding:8px;
  border-radius:13px;
  border:1px solid var(--border);
  background:var(--panel);
  box-shadow:var(--shadow);
}
.layer-menu button {
  width:100%;
  padding:10px;
  text-align:left;
  border:0;
  border-radius:8px;
  background:transparent;
  color:var(--text);
}
.layer-menu button:hover { background:var(--panel-2); }

.aircraft-marker-wrap {
  transition: transform 2.8s linear;
}
.aircraft-marker {
  width: 34px;
  height: 34px;
  display:grid;
  place-items:center;
  transform-origin:center;
  filter: drop-shadow(0 4px 4px rgba(0,0,0,.45));
}
.aircraft-marker svg { width:32px; height:32px; }
.aircraft-marker.emergency svg path { fill: var(--danger); }
.aircraft-marker.ground svg path { fill: var(--warning); }

.leaflet-popup-content-wrapper,
.leaflet-popup-tip {
  background: var(--panel);
  color: var(--text);
}
.leaflet-control-layers,
.leaflet-control-zoom a {
  background: var(--panel) !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
}

@media (max-width: 1050px) {
  :root { --left-w: 280px; --right-w: 330px; }
}

@media (max-width: 850px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: var(--topbar-h) 1fr;
  }
  .topbar {
    grid-column:1;
    grid-template-columns:auto 1fr auto;
  }
  .brand div { display:none; }
  .left-panel {
    position:fixed;
    left:10px;
    top:74px;
    bottom:10px;
    width:min(310px, calc(100vw - 20px));
    border:1px solid var(--border);
    border-radius:14px;
    box-shadow:var(--shadow);
    transform:translateX(calc(-100% - 20px));
    transition:.2s ease;
  }
  .left-panel.mobile-open { transform:translateX(0); }

  .right-panel {
    position:fixed;
    left:10px;
    right:10px;
    bottom:10px;
    top:auto;
    max-height:78vh;
    border:1px solid var(--border);
    border-radius:16px;
    box-shadow:var(--shadow);
    transform:translateY(calc(100% + 20px));
    transition:.2s ease;
  }
  .right-panel.mobile-open { transform:translateY(0); }

  .map-wrap { grid-column:1; grid-row:2; }
}

@media (max-width: 560px) {
  .topbar { padding:0 10px; gap:8px; }
  .top-actions { gap:4px; }
  .icon-button { width:38px; height:38px; }
  .search-wrap input { height:40px; }
}

/* AirRadar map layer selector v3 */
.layer-menu {
  width: 300px;
  max-height: calc(100vh - 82px);
  overflow-y: auto;
  padding: 10px;
}

.layer-menu-title {
  padding: 4px 8px 9px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.layer-menu button {
  display: grid;
  grid-template-columns: 46px 1fr;
  align-items: center;
  gap: 11px;
  min-height: 58px;
  padding: 7px 9px;
  border: 1px solid transparent;
}

.layer-menu button > span:last-child {
  min-width: 0;
}

.layer-menu button strong,
.layer-menu button small {
  display: block;
}

.layer-menu button strong {
  font-size: 13px;
  line-height: 1.2;
}

.layer-menu button small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.25;
}

.layer-menu button.active {
  border-color: rgba(34, 197, 94, .45);
  background: rgba(34, 197, 94, .10);
}

.layer-menu button.active::after {
  content: '✓';
  position: absolute;
  right: 20px;
  color: var(--accent);
  font-weight: 900;
}

.layer-menu button {
  position: relative;
}

.layer-swatch {
  width: 46px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 9px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.08);
}

.layer-swatch.voyager {
  background: linear-gradient(145deg, #dce8d0 0 33%, #a9d0e7 33% 56%, #f4e8c8 56% 100%);
}
.layer-swatch.osm {
  background: linear-gradient(145deg, #d6e9c8 0 38%, #b9d9ec 38% 56%, #f5e8c4 56% 100%);
}
.layer-swatch.light {
  background: linear-gradient(145deg, #f8fafc 0 46%, #dbe4eb 46% 52%, #eef2f6 52% 100%);
}
.layer-swatch.dark {
  background: linear-gradient(145deg, #111827 0 42%, #26374d 42% 49%, #1f2937 49% 100%);
}
.layer-swatch.topo {
  background: repeating-radial-gradient(circle at 25% 75%, #d8e5bf 0 4px, #acbd8f 5px, #e8dfbd 7px 11px);
}
.layer-swatch.satellite {
  background: linear-gradient(145deg, #23452b 0 28%, #73714a 28% 51%, #263d5d 51% 66%, #527447 66% 100%);
}

.radar-range-ring {
  pointer-events: none;
}

.radar-home-marker {
  filter: drop-shadow(0 2px 4px rgba(0,0,0,.55));
}

@media (max-width: 620px) {
  .layer-menu {
    top: 58px;
    right: 10px;
    left: 10px;
    width: auto;
  }
}

/* AirRadar 1.1 – selected aircraft */
.aircraft-marker.selected {
  filter:
    drop-shadow(0 0 3px #ffffff)
    drop-shadow(0 0 9px rgba(239, 68, 68, .95));
}

/* AirRadar 2.0 – uživatelský referenční bod */
.reference-control {
  margin-bottom: 18px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-2);
}
.reference-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 13px;
}
.reference-heading strong {
  color: var(--accent);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.reference-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.compact-button {
  min-height: 36px;
  padding: 6px 8px;
  font-size: 12px;
}
.field-hint {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
}
.field-hint.error { color: var(--danger); }
.reference-marker {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 3px solid #fff;
  border-radius: 50%;
  background: #22c55e;
  color: #052e16;
  box-shadow: 0 3px 12px rgba(0,0,0,.5), 0 0 0 5px rgba(34,197,94,.22);
  font-size: 10px;
}
.reference-marker-wrap { background: transparent; border: 0; }
.pick-location-mode { cursor: crosshair !important; }
.user-range-circle { pointer-events: none; }


/* Data sources and operational disclaimer */
.data-attribution {
  position: fixed;
  right: 10px;
  bottom: 10px;
  z-index: 800;
  max-width: calc(100vw - 20px);
  padding: 5px 9px;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 7px;
  background: rgba(15, 23, 42, .78);
  color: rgba(255, 255, 255, .78);
  font-size: 10px;
  line-height: 1.35;
  text-align: right;
  backdrop-filter: blur(5px);
  pointer-events: auto;
}
.data-attribution a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}
@media (max-width: 700px) {
  .data-attribution {
    right: 6px;
    bottom: 6px;
    max-width: calc(100vw - 12px);
    font-size: 9px;
  }
}


/* About AirRadar dialog */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(3, 7, 18, .72);
  backdrop-filter: blur(6px);
}

.about-modal {
  width: min(560px, 100%);
  max-height: min(760px, calc(100vh - 40px));
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow);
  outline: none;
}

.about-header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.about-brand { display: flex; align-items: center; gap: 12px; }
.about-brand h2 { margin: 0; font-size: 21px; }
.about-brand p { margin: 3px 0 0; color: var(--muted); font-size: 12px; }
.about-content { padding: 20px; }
.about-intro { margin: 0 0 20px; color: var(--muted); line-height: 1.6; }
.about-section { padding: 18px 0; border-top: 1px solid var(--border); }
.about-section h3 { margin: 0 0 11px; font-size: 14px; }
.about-section p { margin: 0; color: var(--muted); line-height: 1.55; }
.about-list { margin: 0; }
.about-list div { display: grid; grid-template-columns: 145px 1fr; gap: 12px; padding: 8px 0; }
.about-list dt { color: var(--muted); }
.about-list dd { margin: 0; font-weight: 700; }
.about-modal a { color: var(--accent); }
.about-warning {
  margin: 0 -10px;
  padding: 16px 10px;
  border-radius: 12px;
  background: rgba(245, 158, 11, .08);
}
.support-section { text-align: center; }
.coffee-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 14px;
  padding: 0 18px;
  border: 2px solid #000;
  border-radius: 11px;
  background: #ffdd00;
  color: #000 !important;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 4px 0 #000;
  transition: transform .15s ease, box-shadow .15s ease;
}
.coffee-button:hover { transform: translateY(-1px); box-shadow: 0 5px 0 #000; }
.coffee-button:active { transform: translateY(2px); box-shadow: 0 2px 0 #000; }
.about-author p { color: var(--text); font-weight: 700; }
.about-footer { padding: 14px 20px 18px; color: var(--muted); text-align: center; font-size: 12px; }
body.modal-open { overflow: hidden; }

@media (max-width: 560px) {
  .modal-backdrop { padding: 10px; }
  .about-modal { max-height: calc(100vh - 20px); border-radius: 16px; }
  .about-header, .about-content { padding-left: 16px; padding-right: 16px; }
  .about-list div { grid-template-columns: 1fr; gap: 3px; }
}

/* Mobile-only layout enhancement. Desktop rules above remain unchanged. */
.mobile-nav { display: none; }

@media (max-width: 850px) {
  :root { --mobile-nav-h: 68px; }

  html, body,
  .app-shell {
    height: 100%;
    height: 100dvh;
    min-height: 100dvh;
  }

  .app-shell {
    position: relative;
    padding-bottom: calc(var(--mobile-nav-h) + env(safe-area-inset-bottom));
  }

  .topbar {
    min-width: 0;
    padding-top: env(safe-area-inset-top);
  }

  .search-wrap { min-width: 0; }

  .search-wrap input {
    min-width: 0;
    font-size: 16px; /* prevents automatic zoom on iOS */
  }

  .map-wrap {
    min-height: 0;
    height: 100%;
  }

  .left-panel {
    z-index: 1600;
    left: 8px;
    right: 8px;
    top: calc(var(--topbar-h) + env(safe-area-inset-top) + 8px);
    bottom: calc(var(--mobile-nav-h) + env(safe-area-inset-bottom) + 8px);
    width: auto;
    max-width: 430px;
    border-radius: 18px;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .left-panel.mobile-open {
    transform: translateX(0);
  }

  .right-panel {
    z-index: 1700;
    left: 8px;
    right: 8px;
    bottom: calc(var(--mobile-nav-h) + env(safe-area-inset-bottom) + 8px);
    max-height: min(76dvh, 720px);
    padding: 18px;
    border-radius: 20px;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .right-panel::before {
    content: '';
    display: block;
    width: 42px;
    height: 4px;
    margin: -8px auto 12px;
    border-radius: 999px;
    background: var(--border);
  }

  .mobile-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1900;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    min-height: calc(var(--mobile-nav-h) + env(safe-area-inset-bottom));
    padding: 6px max(8px, env(safe-area-inset-right)) env(safe-area-inset-bottom) max(8px, env(safe-area-inset-left));
    border-top: 1px solid var(--border);
    background: var(--panel);
    box-shadow: 0 -8px 30px rgba(0,0,0,.22);
    backdrop-filter: blur(14px);
  }

  .mobile-nav-button {
    min-width: 0;
    min-height: 54px;
    display: grid;
    place-content: center;
    gap: 2px;
    border: 0;
    border-radius: 12px;
    background: transparent;
    color: var(--muted);
  }

  .mobile-nav-button span {
    font-size: 22px;
    line-height: 1;
  }

  .mobile-nav-button small {
    font-size: 11px;
    font-weight: 700;
  }

  .mobile-nav-button.active {
    color: var(--accent);
    background: rgba(34,197,94,.10);
  }

  .icon-button,
  .primary-button,
  .secondary-button,
  .text-button,
  .aircraft-row,
  .mobile-nav-button {
    touch-action: manipulation;
  }

  .icon-button { min-width: 44px; min-height: 44px; }
  .primary-button, .secondary-button { min-height: 46px; }
  .aircraft-row { min-height: 58px; }

  .map-status {
    left: 8px;
    bottom: 8px;
    max-width: calc(100% - 16px);
  }

  .data-attribution {
    bottom: calc(var(--mobile-nav-h) + env(safe-area-inset-bottom) + 6px);
  }

  .connection-banner {
    width: calc(100% - 24px);
    text-align: center;
  }
}

@media (max-width: 560px) {
  :root { --topbar-h: 58px; }

  .topbar {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 7px;
    padding-left: max(8px, env(safe-area-inset-left));
    padding-right: max(8px, env(safe-area-inset-right));
  }

  .brand-mark { width: 38px; height: 38px; }
  .top-actions .icon-button { width: 42px; height: 42px; }
  #aboutButton { display: none; }

  .search-wrap input {
    height: 42px;
    padding: 0 10px;
  }

  .stats-grid article { padding: 13px; }
  .panel-section { padding: 15px; }
  .detail-header h1 { font-size: 25px; }
  .detail-metrics { margin: 16px 0; }
}