/* ==========================================================================
   GPS Tracker Pro — Design System
   A dark, radar/signal-inspired command-center UI for live fleet & asset
   tracking. Palette is red / black / white with white for "online" and
   red for alert states.
   ========================================================================== */

:root {
  /* -- Color tokens -------------------------------------------------- */
  --bg-base: #000000;
  --bg-deep: #050505;
  --panel: rgba(24, 24, 24, 0.78);
  --panel-solid: #141414;
  --panel-border: rgba(255, 255, 255, 0.1);
  --panel-border-strong: rgba(255, 59, 59, 0.45);

  --accent: #ff3b3b;          /* signal red */
  --accent-dim: #d62f2f;
  --accent-glow: rgba(255, 59, 59, 0.35);

  --amber: #ff7a7a;           /* caution / speed */
  --red: #ff2020;             /* danger / offline */
  --green: #ffffff;           /* online (white) */
  --violet: #d0d0d0;          /* pet type accent (light gray) */
  --blue: #ffffff;            /* human type accent (white) */

  --text-primary: #ffffff;
  --text-secondary: #c4c4c4;
  --text-muted: #8a8a8a;

  /* -- Type ------------------------------------------------------------ */
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* -- Layout ------------------------------------------------------------ */
  --sidebar-w: 340px;
  --topbar-h: 64px;
  --bottom-nav-h: 60px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-panel: 0 8px 32px rgba(0, 0, 0, 0.45);
  --transition: 180ms cubic-bezier(.4, 0, .2, 1);
}

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

html, body {
  height: 100%;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    radial-gradient(circle at 15% 10%, rgba(255, 59, 59, 0.07), transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(255, 255, 255, 0.04), transparent 45%);
  overflow: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select { font-family: inherit; }
::selection { background: var(--accent-glow); }

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* Scrollbars */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.22); }

/* Focus visibility */
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ==========================================================================
   App shell
   ========================================================================== */
.app-shell {
  height: 100vh;
  height: 100dvh; /* dynamic viewport height — avoids bottom clipping on mobile browsers */
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar main";
}

* { -webkit-tap-highlight-color: transparent; }
button { touch-action: manipulation; }

/* -- Top navigation bar --------------------------------------------------- */
.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  background: var(--panel);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--panel-border);
  z-index: 40;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 22px;
  min-width: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.3px;
}

.brand-mark {
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.brand-mark::before {
  content: "";
  width: 100%; height: 100%;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23ff3b3b"><path d="M12 2C8.1 2 5 5.1 5 9c0 5.2 7 13 7 13s7-7.8 7-13c0-3.9-3.1-7-7-7z"/><circle cx="12" cy="9" r="3.2" fill="%23ffffff"/></svg>') center / contain no-repeat;
  filter: drop-shadow(0 0 10px rgba(255, 59, 59, 0.5));
}

.brand small { color: var(--text-muted); font-weight: 400; font-size: 11px; display: block; }

.topnav-links {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.03);
  padding: 4px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--panel-border);
}
.topnav-links a {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.topnav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.topnav-links a.active { color: var(--bg-deep); background: var(--accent); }

.topbar-right { display: flex; align-items: center; gap: 14px; }

.icon-btn {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  position: relative;
  transition: var(--transition);
}
.icon-btn:hover { background: rgba(255,255,255,0.06); color: var(--text-primary); }
.icon-btn svg { width: 18px; height: 18px; }

.badge-dot {
  position: absolute; top: 6px; right: 6px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 2px var(--panel-solid);
}

.user-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 10px 5px 5px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-border);
}
.user-avatar {
  width: 26px; height: 26px; border-radius: 50%;
  background: linear-gradient(135deg, var(--violet), var(--blue));
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
}
.user-chip span { font-size: 12.5px; color: var(--text-secondary); }

/* ==========================================================================
   Sidebar — device list
   ========================================================================== */
.sidebar {
  grid-area: sidebar;
  background: var(--panel);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-right: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  z-index: 30;
  overflow: hidden;
}

.sidebar-header {
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--panel-border);
  background-image: radial-gradient(circle at 100% 0%, rgba(255,59,59,0.08), transparent 60%);
}

.sidebar-title {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.sidebar-title h2 { font-family: var(--font-display); font-size: 15px; font-weight: 600; }
.device-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  background: rgba(255,59,59,0.12);
  border: 1px solid rgba(255,59,59,0.3);
  padding: 2px 8px;
  border-radius: 999px;
}

.search-box {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}
.search-box svg { width: 15px; height: 15px; color: var(--text-muted); flex-shrink: 0; }
.search-box input {
  background: none; border: none; outline: none;
  color: var(--text-primary); font-size: 13px; width: 100%;
}
.search-box input::placeholder { color: var(--text-muted); }

.filter-row {
  display: flex; gap: 6px; padding: 10px 18px 12px;
  border-bottom: 1px solid var(--panel-border);
  overflow-x: auto;
}
.filter-chip {
  font-size: 11.5px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-border);
  color: var(--text-secondary);
  white-space: nowrap;
  transition: var(--transition);
}
.filter-chip:hover { color: var(--text-primary); }
.filter-chip.active { background: var(--accent); color: var(--bg-deep); border-color: var(--accent); }

.device-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 10px 20px;
}

.device-card {
  display: flex;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}
.device-card:hover { background: rgba(255,255,255,0.04); }
.device-card.selected {
  background: rgba(255,59,59,0.1);
  border-color: var(--panel-border-strong);
}

.device-icon-wrap { position: relative; flex-shrink: 0; }
.device-icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--panel-border);
}
.device-icon svg { width: 20px; height: 20px; }
.type-vehicle .device-icon { color: var(--accent); }
.type-human .device-icon { color: var(--blue); }
.type-pet .device-icon { color: var(--violet); }
.type-asset .device-icon { color: var(--amber); }

.status-ring {
  position: absolute; bottom: -2px; right: -2px;
  width: 13px; height: 13px; border-radius: 50%;
  border: 2px solid var(--panel-solid);
}
.status-ring.online { background: var(--green); box-shadow: 0 0 8px var(--green); }
.status-ring.offline { background: var(--text-muted); }

.device-info { flex: 1; min-width: 0; }
.device-info-top { display: flex; align-items: baseline; justify-content: space-between; gap: 6px; }
.device-name { font-size: 13.5px; font-weight: 600; }
.device-time { font-size: 10.5px; color: var(--text-muted); font-family: var(--font-mono); flex-shrink: 0; }

.device-meta { display: flex; align-items: center; gap: 10px; margin-top: 4px; }
.meta-item { display: flex; align-items: center; gap: 4px; font-size: 11px; color: var(--text-secondary); }
.meta-item svg { width: 12px; height: 12px; }

.battery-bar {
  width: 34px; height: 5px; border-radius: 3px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.battery-fill { height: 100%; border-radius: 3px; background: var(--green); }
.battery-fill.low { background: var(--amber); }
.battery-fill.critical { background: var(--red); }

.device-address {
  font-size: 10.5px;
  color: var(--text-muted);
  margin-top: 5px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.empty-state {
  text-align: center; padding: 40px 20px; color: var(--text-muted);
}
.empty-state svg { width: 40px; height: 40px; margin-bottom: 10px; opacity: 0.5; }
.empty-state p { font-size: 12.5px; }

/* ==========================================================================
   Main map area
   ========================================================================== */
.main-view { grid-area: main; position: relative; overflow: hidden; }
#map { width: 100%; height: 100%; position: relative; z-index: 1; }

/* Floating info cards over the map */
.floating-panel {
  position: absolute;
  background: var(--panel);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
  z-index: 20;
}

.stats-strip {
  top: 18px; left: 18px; right: 18px;
  display: flex; gap: 12px;
  padding: 14px 18px;
  flex-wrap: wrap;
}
.stat-block { display: flex; align-items: center; gap: 10px; padding-right: 18px; border-right: 1px solid var(--panel-border); }
.stat-block:last-child { border-right: none; }
.stat-icon {
  width: 34px; height: 34px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,59,59,0.12); color: var(--accent);
}
.stat-icon svg { width: 16px; height: 16px; }
.stat-value { font-family: var(--font-display); font-size: 18px; font-weight: 700; line-height: 1.1; }
.stat-label { font-size: 10.5px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; }

.device-detail-card {
  bottom: 18px; left: 18px;
  width: 320px;
  padding: 18px;
  display: none;
}
.device-detail-card.open { display: block; animation: slideUp 220ms ease; }
@keyframes slideUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

.detail-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 14px; }
.detail-title { display: flex; gap: 10px; align-items: center; }
.detail-title h3 { font-family: var(--font-display); font-size: 15px; }
.detail-title .tag { font-size: 10.5px; color: var(--text-muted); text-transform: capitalize; }
.close-btn { color: var(--text-muted); width: 26px; height: 26px; border-radius: 6px; display: flex; align-items: center; justify-content: center; }
.close-btn:hover { background: rgba(255,255,255,0.06); color: var(--text-primary); }

.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.detail-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
}
.detail-item .label { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3px; margin-bottom: 3px; }
.detail-item .value { font-family: var(--font-mono); font-size: 13px; font-weight: 600; }

.detail-coords {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-secondary);
  background: rgba(255,255,255,0.03); border-radius: var(--radius-sm);
  padding: 8px 11px; margin-bottom: 12px; border: 1px solid var(--panel-border);
}

.btn-row { display: flex; gap: 8px; }
.btn {
  flex: 1; padding: 9px 12px; border-radius: var(--radius-sm);
  font-size: 12.5px; font-weight: 600;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  transition: var(--transition);
  border: 1px solid var(--panel-border);
}
.btn svg { width: 14px; height: 14px; }
.btn-primary { background: var(--accent); color: var(--bg-deep); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-dim); }
.btn-ghost { background: rgba(255,255,255,0.03); color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.btn-danger { background: rgba(255,77,94,0.12); color: var(--red); border-color: rgba(255,77,94,0.3); }
.btn-danger:hover { background: rgba(255,77,94,0.2); }

.map-controls {
  position: absolute; bottom: 18px; right: 18px;
  display: flex; flex-direction: column; gap: 8px; z-index: 20;
}
.map-ctrl-btn {
  width: 40px; height: 40px;
  background: var(--panel); backdrop-filter: blur(18px);
  border: 1px solid var(--panel-border); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); box-shadow: var(--shadow-panel);
}
.map-ctrl-btn:hover { color: var(--accent); border-color: var(--panel-border-strong); }
.map-ctrl-btn svg { width: 17px; height: 17px; }

/* Loading overlay */
.loading-overlay {
  position: absolute; inset: 0; z-index: 50;
  background: var(--bg-base);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px;
  transition: opacity 400ms ease, visibility 400ms ease;
}
.loading-overlay.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.radar-loader {
  width: 64px; height: 64px; border-radius: 50%;
  border: 2px solid rgba(255,59,59,0.18);
  position: relative;
}
.radar-loader::before {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  background: conic-gradient(from 0deg, transparent, var(--accent));
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 2px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 2px));
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay p { font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); letter-spacing: 0.5px; }

/* Toast / alert notifications */
.toast-stack {
  position: absolute; top: 90px; right: 18px; z-index: 60;
  display: flex; flex-direction: column; gap: 10px; width: 320px;
}
.toast {
  padding: 13px 14px; border-radius: var(--radius-md);
  background: var(--panel); backdrop-filter: blur(18px);
  border: 1px solid var(--panel-border); box-shadow: var(--shadow-panel);
  display: flex; gap: 10px; align-items: flex-start;
  animation: toastIn 220ms ease;
  border-left: 3px solid var(--accent);
}
.toast.warning { border-left-color: var(--amber); }
.toast.danger { border-left-color: var(--red); }
@keyframes toastIn { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }
.toast svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 1px; }
.toast.warning svg { color: var(--amber); }
.toast.danger svg { color: var(--red); }
.toast strong { font-size: 12.5px; display: block; margin-bottom: 2px; }
.toast p { font-size: 11.5px; color: var(--text-secondary); }
.toast-close { margin-left: auto; color: var(--text-muted); }

/* GPS marker pulse (used inside Leaflet marker icon) */
@keyframes pulseRing {
  0% { transform: scale(0.4); opacity: 0.9; }
  100% { transform: scale(2.4); opacity: 0; }
}

/* Leaflet popup used for history point alerts (dark theme) */
.leaflet-popup-content-wrapper {
  background: var(--panel-solid);
  color: var(--text-primary);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-panel);
}
.leaflet-popup-content { margin: 12px 14px; }
.leaflet-popup-tip { background: var(--panel-solid); }
.leaflet-popup-close-button { color: var(--text-muted); }
.history-point-popup .hpp-time { font-family: var(--font-mono); font-size: 13px; font-weight: 700; }
.history-point-popup .hpp-meta { font-size: 11.5px; color: var(--text-secondary); margin-top: 3px; }

/* ==========================================================================
   Panels page (devices.html / history.html shared content area)
   ========================================================================== */
.content-scroll { grid-area: main; overflow-y: auto; padding: 28px 32px 60px; }
.page-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 24px; flex-wrap: wrap; gap: 14px; }
.page-head h1 { font-family: var(--font-display); font-size: 24px; font-weight: 600; }
.page-head p { color: var(--text-muted); font-size: 13px; margin-top: 4px; }

.panel-card {
  background: var(--panel); backdrop-filter: blur(14px);
  border: 1px solid var(--panel-border); border-radius: var(--radius-lg);
  padding: 20px; box-shadow: var(--shadow-panel);
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 11.5px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; }
.field input, .field select {
  background: rgba(255,255,255,0.04); border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm); padding: 10px 12px; color: var(--text-primary); font-size: 13.5px;
  outline: none; transition: var(--transition);
}
.field input:focus, .field select:focus { border-color: var(--panel-border-strong); background: rgba(255,255,255,0.06); }

table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.4px; color: var(--text-muted); padding: 10px 12px; border-bottom: 1px solid var(--panel-border); }
td { padding: 12px; font-size: 13px; border-bottom: 1px solid var(--panel-border); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }
tr.selected-point td { background: rgba(255,59,59,0.12) !important; }

/* History page: route map + points table side by side */
.history-split {
  display: flex;
  gap: 20px;
  align-items: stretch;
}
.history-map-panel { flex: 1.2; min-width: 0; padding: 0; overflow: hidden; }
.history-table-panel {
  flex: 1; min-width: 0;
  max-height: 420px;
  overflow-y: auto;
  padding: 0;
}
.history-table-panel thead th { position: sticky; top: 0; background: var(--panel-solid); z-index: 1; }

.status-pill {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 600; padding: 3px 9px; border-radius: 999px;
}
.status-pill.online { background: rgba(255,255,255,0.12); color: var(--green); }
.status-pill.offline { background: rgba(108,122,140,0.15); color: var(--text-muted); }
.status-pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.type-pill { font-size: 11px; padding: 3px 9px; border-radius: 999px; text-transform: capitalize; font-weight: 600; }
.type-pill.vehicle { background: rgba(255,59,59,0.12); color: var(--accent); }
.type-pill.human { background: rgba(255,255,255,0.12); color: var(--blue); }
.type-pill.pet { background: rgba(208,208,208,0.12); color: var(--violet); }
.type-pill.asset { background: rgba(255,122,122,0.12); color: var(--amber); }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.8); backdrop-filter: blur(4px);
  display: none; align-items: center; justify-content: center; z-index: 100;
}
.modal-backdrop.open { display: flex; animation: fadeIn 180ms ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
  width: 420px; max-width: 92vw; background: var(--panel-solid);
  border: 1px solid var(--panel-border); border-radius: var(--radius-lg);
  padding: 22px; box-shadow: var(--shadow-panel);
  animation: slideUp 220ms ease;
}
.modal h3 { font-family: var(--font-display); font-size: 16px; margin-bottom: 16px; }
.modal .field { margin-bottom: 14px; }
.modal-actions { display: flex; gap: 10px; margin-top: 18px; }

/* ==========================================================================
   Login page
   ========================================================================== */
.auth-wrap {
  height: 100vh;
  height: 100dvh;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-base);
  background-image: radial-gradient(circle at 50% 0%, rgba(255,59,59,0.08), transparent 55%);
}
.auth-card {
  width: 380px; max-width: 90vw;
  background: var(--panel); backdrop-filter: blur(18px);
  border: 1px solid var(--panel-border); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow-panel);
}
.auth-logo { display: flex; flex-direction: column; align-items: center; gap: 10px; margin-bottom: 24px; }
.auth-logo h1 { font-family: var(--font-display); font-size: 19px; }
.auth-logo span { font-size: 11.5px; color: var(--text-muted); }
.auth-card .field { margin-bottom: 14px; }
.auth-error { font-size: 12px; color: var(--red); margin-top: 4px; min-height: 16px; }

/* ==========================================================================
   Mobile-only components (bottom nav, account menu, device alerts)
   Hidden on desktop; revealed in the <= 860px media query.
   ========================================================================== */
.menu-btn { display: none; }

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--topbar-h);
  right: 12px;
  width: 250px;
  background: var(--panel-solid);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-panel);
  z-index: 60;
  overflow: hidden;
}
.mobile-menu.open { display: block; animation: menuDrop 180ms ease; }
@keyframes menuDrop { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

.mobile-menu-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px;
  border-bottom: 1px solid var(--panel-border);
  background-image: radial-gradient(circle at 100% 0%, rgba(255,59,59,0.1), transparent 60%);
}
.mobile-menu-name { font-size: 13.5px; font-weight: 600; }
.mobile-menu-sub { font-size: 11px; color: var(--text-muted); }

.mobile-menu-items { padding: 6px; }
.mobile-menu-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 11px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.mobile-menu-item:hover { background: rgba(255,255,255,0.05); color: var(--text-primary); }
.mobile-menu-item.danger { color: var(--red); }
.mobile-menu-item.danger:hover { background: rgba(255,77,94,0.12); }
.mobile-menu-item svg { width: 16px; height: 16px; }

.bottom-nav {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: calc(var(--bottom-nav-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: var(--panel-solid);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-top: 1px solid var(--panel-border);
  z-index: 45;
}
.bottom-nav-item {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px;
  font-size: 10.5px;
  color: var(--text-muted);
  transition: var(--transition);
}
.bottom-nav-item svg { width: 20px; height: 20px; }
.bottom-nav-item:hover { color: var(--text-primary); }
.bottom-nav-item.active { color: var(--accent); }

.mobile-alerts { display: none; }
.mobile-alert-card {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  background: var(--panel);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-panel);
  cursor: pointer;
  transition: var(--transition);
}
.mobile-alert-card:active { transform: scale(0.99); }
.mobile-alert-card .status-ring { position: static; flex-shrink: 0; }
.mobile-alert-info { flex: 1; min-width: 0; }
.mobile-alert-name {
  font-size: 13px; font-weight: 600;
  display: flex; align-items: center; justify-content: space-between; gap: 6px;
}
.mobile-alert-time { font-size: 10px; color: var(--text-muted); font-family: var(--font-mono); flex-shrink: 0; }
.mobile-alert-meta {
  display: flex; align-items: center; gap: 8px; margin-top: 3px;
  font-size: 11px; color: var(--text-secondary);
}
.mobile-alert-meta .battery-bar { width: 30px; height: 4px; }
.mobile-alert-coords {
  font-size: 10.5px; color: var(--text-muted); margin-top: 3px;
  font-family: var(--font-mono);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-strip { overflow-x: auto; flex-wrap: nowrap; }
}

@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; grid-template-areas: "topbar" "main"; }
  /* Mobile: no sidebar — device data is shown as alert cards over the map */
  .sidebar { display: none; }
  .stats-strip { top: 12px; left: 12px; right: 12px; }
  .topnav-links { display: none; }
  .topbar-right { display: none; }
  .brand small { display: none; }
  .menu-btn { display: flex; }
  .bottom-nav { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .content-scroll { padding: 20px 20px calc(var(--bottom-nav-h) + env(safe-area-inset-bottom) + 24px); }

  /* History split stacks vertically on phones */
  .history-split { flex-direction: column; }
  .history-table-panel { max-height: 320px; }

  /* Device data alerts on the map (below the stats strip) */
  .mobile-alerts {
    display: flex;
    position: absolute;
    top: calc(var(--topbar-h) + 80px);
    left: 12px; right: 12px;
    flex-direction: column;
    gap: 8px;
    max-height: calc(100vh - var(--topbar-h) - var(--bottom-nav-h) - 170px);
    overflow-y: auto;
    z-index: 15;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(to bottom, #000 88%, transparent);
    mask-image: linear-gradient(to bottom, #000 88%, transparent);
  }
  .mobile-alert-card { pointer-events: auto; }

  /* Floating map panels sit above the bottom nav */
  .device-detail-card {
    left: 12px;
    width: calc(100vw - 24px);
    bottom: calc(var(--bottom-nav-h) + 12px + env(safe-area-inset-bottom));
  }
  .map-controls {
    right: 12px;
    bottom: calc(var(--bottom-nav-h) + 12px + env(safe-area-inset-bottom));
  }
  .toast-stack {
    top: calc(var(--topbar-h) + 8px);
    right: 12px;
    width: calc(100vw - 24px);
  }

  /* History trip-stats cards: 2 rows of 2 on phones */
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
  .stats-strip { padding: 10px 12px; }
  .stat-block { padding-right: 10px; gap: 6px; }
  .stat-label { font-size: 9px; letter-spacing: 0.2px; }
  .stat-value { font-size: 16px; }
}

/* ==========================================================================
   Small phones (< 720px)
   ========================================================================== */
@media (max-width: 720px) {
  /* Keep full-height tables scrollable instead of squashing them */
  .panel-card { overflow-x: auto; }
  table { min-width: 540px; }

  /* Prevent iOS Safari auto-zoom when focusing inputs */
  input, select, textarea { font-size: 16px; }
}

@media (max-width: 480px) {
  /* -- Topbar compacting ------------------------------------------------ */
  .topbar { padding: 0 12px; }
  .topbar-left { gap: 10px; }
  .brand { font-size: 15px; gap: 8px; }
  .brand-mark { width: 24px; height: 24px; }

  /* -- Content pages ---------------------------------------------------- */
  .content-scroll { padding: 14px; }
  .page-head h1 { font-size: 20px; }
  .page-head { margin-bottom: 16px; }

  /* -- Map overlays ----------------------------------------------------- */
  .stats-strip { top: 12px; left: 12px; right: 12px; }
  .device-detail-card { padding: 14px; }

  /* -- Modals / forms ---------------------------------------------------- */
  .auth-card { padding: 26px 20px; }
  .modal { padding: 18px; }
  .modal-actions { flex-direction: column-reverse; }
  .modal-actions .btn { width: 100%; }
}

@media (max-width: 360px) {
  .brand { font-size: 14px; }
  .stat-value { font-size: 15px; }
  .topbar-left { gap: 8px; }
}

/* ==========================================================================
   Dark map basemap (key-free)
   Inverts the free OpenStreetMap tiles with CSS to produce a dark "command
   center" theme. No API key required — works with any standard OSM/light
   tile source. Attribution is kept in the map corner automatically.
   ========================================================================== */
.leaflet-tile-pane {
  filter: invert(100%) hue-rotate(180deg) brightness(95%) contrast(90%) saturate(0.9);
}
/* Keep the dark background while tiles load / during pan */
.leaflet-container { background: #050505; }