/* ═══════════════════════════════════════════════════════
   Device Tracker — Premium Dark Mode Dashboard
   ═══════════════════════════════════════════════════════ */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-tertiary: #1a2233;
  --bg-card: #151d2e;
  --bg-hover: #1e293b;
  --bg-input: #0d1321;

  --border-color: #1e293b;
  --border-focus: #3b82f6;

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-blue: #3b82f6;
  --accent-blue-glow: rgba(59, 130, 246, 0.3);
  --accent-green: #22c55e;
  --accent-green-glow: rgba(34, 197, 94, 0.2);
  --accent-red: #ef4444;
  --accent-yellow: #eab308;
  --accent-purple: #8b5cf6;

  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --gradient-card: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --sidebar-width: 320px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

.hidden { display: none !important; }
.text-muted { color: var(--text-muted); font-size: 0.8rem; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ═══════════════════════════════════════════
   LOGIN SCREEN
   ═══════════════════════════════════════════ */

.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.login-screen::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  top: 20%;
  left: 30%;
  pointer-events: none;
}

.login-screen::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
  bottom: 10%;
  right: 20%;
  pointer-events: none;
}

.login-card {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  width: 420px;
  max-width: 90vw;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.logo-icon {
  font-size: 48px;
  margin-bottom: 12px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.login-logo h1 {
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-logo p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

.input-group {
  margin-bottom: 16px;
}

.input-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-group input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input-group input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 24px;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-blue-glow);
}

.btn-primary:active { transform: translateY(0); }

.login-error {
  margin-top: 16px;
  padding: 10px 16px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-sm);
  color: var(--accent-red);
  font-size: 0.85rem;
  text-align: center;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* ═══════════════════════════════════════════
   DASHBOARD LAYOUT
   ═══════════════════════════════════════════ */

.dashboard {
  display: flex;
  height: 100vh;
}

/* ── Sidebar ── */

.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: width var(--transition), min-width var(--transition);
  z-index: 10;
}

.sidebar.collapsed {
  width: 0;
  min-width: 0;
  overflow: hidden;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-blue);
  box-shadow: 0 0 8px var(--accent-blue-glow);
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-section {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-section:nth-child(2) {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.device-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  background: var(--accent-blue);
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  color: white;
}

/* ── Device List ── */

.device-list {
  flex: 1;
  overflow-y: auto;
}

.device-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

.device-item:hover {
  background: var(--bg-hover);
}

.device-item.active {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.device-item .device-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.device-item .device-info {
  flex: 1;
  min-width: 0;
}

.device-item .device-name {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.device-item .device-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 3px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.device-item .online-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.device-item .online-dot.online { background: var(--accent-green); box-shadow: 0 0 6px var(--accent-green-glow); }
.device-item .online-dot.offline { background: var(--text-muted); }
.device-item .online-dot.paused { background: var(--accent-amber); box-shadow: 0 0 6px rgba(245, 158, 11, 0.5); }

.device-item .battery-badge {
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 999px;
  background: var(--bg-tertiary);
}

.battery-badge.low { color: var(--accent-red); }
.battery-badge.medium { color: var(--accent-yellow); }
.battery-badge.high { color: var(--accent-green); }

.empty-state {
  text-align: center;
  padding: 40px 16px;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 40px;
  opacity: 0.4;
  margin-bottom: 12px;
}

.empty-state p {
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.empty-state span {
  font-size: 0.8rem;
}

/* ── Date Filters ── */

.date-filters {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.date-filters input {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.82rem;
  outline: none;
  transition: border-color var(--transition);
  color-scheme: dark;
}

.date-filters input:focus {
  border-color: var(--border-focus);
}

.btn-secondary {
  width: 100%;
  padding: 9px 16px;
  background: var(--accent-blue);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-family: var(--font-family);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-secondary:hover {
  background: #2563eb;
}

.btn-ghost {
  width: 100%;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-sm { padding: 6px 10px; width: auto; }

/* ── Sidebar Footer ── */

.sidebar-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online {
  background: var(--accent-green);
  box-shadow: 0 0 6px var(--accent-green-glow);
}

.status-dot.offline {
  background: var(--accent-red);
}

/* ═══════════════════════════════════════════
   MAP
   ═══════════════════════════════════════════ */

.main-content {
  flex: 1;
  position: relative;
}

.map {
  width: 100%;
  height: 100%;
}

/* Dark map tiles */
/* Removed dark mode filter: .leaflet-tile-pane { filter: invert(1) hue-rotate(180deg) brightness(0.85) contrast(1.2) saturate(0.3); } */
.leaflet-control-zoom a {
  background: var(--bg-card) !important;
  color: var(--text-primary) !important;
  border-color: var(--border-color) !important;
}
.leaflet-control-attribution {
  background: rgba(10, 14, 23, 0.8) !important;
  color: var(--text-muted) !important;
  font-size: 0.65rem !important;
}
.leaflet-control-attribution a { color: var(--accent-blue) !important; }

/* Custom marker */
.custom-marker {
  position: relative;
}

.marker-dot {
  width: 18px;
  height: 18px;
  background: var(--accent-blue);
  border: 3px solid white;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5), 0 0 12px var(--accent-blue-glow);
}

.marker-dot.paused {
  background: var(--accent-amber);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5), 0 0 12px rgba(245, 158, 11, 0.7);
}

.marker-pulse {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.2);
  animation: markerPulse 2s ease-out infinite;
}

@keyframes markerPulse {
  0% { transform: translate(-50%, -50%) scale(0.5); opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(2); opacity: 0; }
}

.marker-label {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  font-family: var(--font-family);
}

/* ═══════════════════════════════════════════
   DEVICE PANEL (Map Overlay)
   ═══════════════════════════════════════════ */

.device-panel {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 320px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.panel-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-hover);
  border: none;
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition);
}

.panel-close:hover { background: var(--accent-red); color: white; }

.panel-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.panel-device-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1.4rem;
}

.panel-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.panel-stats {
  padding: 16px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.stat {
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.stat-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-value {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ═══════════════════════════════════════════
   REFRESH INDICATOR
   ═══════════════════════════════════════════ */

.refresh-indicator {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.refresh-indicator.visible {
  opacity: 1;
}

.refresh-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */

@media (max-width: 768px) {
  .sidebar {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    z-index: 1000; /* Ensure above map */
    box-shadow: var(--shadow-lg);
  }

  .sidebar.collapsed {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    transform: translateX(-100%);
    box-shadow: none;
  }

  .device-panel {
    width: calc(100% - 32px);
    top: auto;
    bottom: 16px;
    right: 16px;
    left: 16px;
    max-height: 50vh;
  }

  /* Make login screen scale nicely on small screens */
  .login-card {
    padding: 24px;
  }
}

/* ── Pause Dialog Styles ── */
.pause-dialog {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 0;
  max-width: 420px;
  width: 90%;
  margin: auto;
  box-shadow: var(--shadow-lg);
  outline: none;
}

.pause-dialog::backdrop {
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
}

.dialog-content {
  padding: 24px;
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pause-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.btn-pause-option {
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.btn-pause-option:hover {
  background: var(--bg-hover);
  border-color: var(--accent-blue);
  color: #fff;
  transform: translateY(-1px);
}

.btn-pause-option.pause-indefinite {
  grid-column: span 2;
  background: rgba(234, 179, 8, 0.1);
  border-color: rgba(234, 179, 8, 0.3);
  color: var(--accent-yellow);
}

.btn-pause-option.pause-indefinite:hover {
  background: rgba(234, 179, 8, 0.2);
  border-color: var(--accent-yellow);
}