/* ============================================================
   TrackSense — theme matched to AutoMoto / Vaayu Mitra branding
   ============================================================ */

:root {
  --teal: #0f766e;
  --teal-dark: #0b5a54;
  --green: #16a34a;
  --green-dark: #128038;
  --text-dark: #1f2937;
  --text-mid: #6b7280;
  --bg: #f7f8fa;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  --danger: #dc2626;
  --warn: #d97706;
  --blue: #2563eb;
  --sidebar-w: 260px;
  --sidebar-w-collapsed: 64px;
  --topbar-h: 64px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text-dark);
}

img { max-width: 100%; }
button { cursor: pointer; font-family: inherit; }

/* ---------------- Login screen ---------------- */

#loginScreen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #f0fdfa 100%);
}

.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px 36px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 4px 24px rgba(15, 118, 110, 0.08);
}

.login-logo { display: flex; align-items: center; margin-bottom: 8px; }
.brand-logo { display: block; width: auto; }
.brand-logo-login { height: 42px; }
.brand-logo-topbar { height: 30px; }

.login-subtitle { color: var(--text-mid); font-size: 13px; margin-bottom: 28px; }

.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-dark); }
.field input {
  width: 100%; padding: 11px 12px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; outline: none; transition: border-color 0.15s;
}
.field input:focus { border-color: var(--teal); }

.btn-primary {
  width: 100%; padding: 12px; background: var(--green); color: white;
  border: none; border-radius: 8px; font-size: 14px; font-weight: 700;
  transition: background 0.15s;
}
.btn-primary:hover { background: var(--green-dark); }

.login-error {
  background: #fef2f2; color: var(--danger); border: 1px solid #fecaca;
  border-radius: 8px; padding: 10px 12px; font-size: 13px; margin-bottom: 16px; display: none;
}

/* ---------------- App shell ---------------- */

#appShell { display: none; min-height: 100vh; }

.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h);
  background: #ffffff; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px; z-index: 100;
}
.topbar-left { display: flex; align-items: center; gap: 14px; }
#sidebarToggle {
  background: none; border: none; font-size: 20px; color: var(--text-dark);
  padding: 6px; border-radius: 6px;
}
#sidebarToggle:hover { background: var(--bg); }

.topbar-right { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--text-mid); }
.btn-logout {
  background: none; border: 1px solid var(--border); color: var(--text-dark);
  padding: 7px 14px; border-radius: 7px; font-size: 13px; font-weight: 600;
}
.btn-logout:hover { border-color: var(--teal); color: var(--teal); }

/* ---------------- Sidebar ---------------- */

.sidebar {
  position: fixed; top: var(--topbar-h); bottom: 0; left: 0; width: var(--sidebar-w);
  background: #ffffff; border-right: 1px solid var(--border);
  overflow-y: auto; overflow-x: hidden; transition: width 0.2s, transform 0.2s; z-index: 90;
}

.sidebar.collapsed { width: var(--sidebar-w-collapsed); }
.sidebar.collapsed .device-name,
.sidebar.collapsed .device-meta,
.sidebar.collapsed .sidebar-section-title,
.sidebar.collapsed .sidebar-search,
.sidebar.collapsed .nav-label,
.sidebar.collapsed .device-item { display: none; }
.sidebar.collapsed .nav-tab { justify-content: center; padding: 12px 0; }
.sidebar.collapsed .nav-tab .icon { margin: 0; font-size: 17px; }

.sidebar-section-title {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--text-mid); padding: 16px 16px 8px; font-weight: 700; white-space: nowrap;
}

.sidebar-search { padding: 0 16px 12px; }
.sidebar-search input {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 7px; font-size: 13px;
}

.nav-tabs { padding: 8px; }
.nav-tab {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border-radius: 8px; color: var(--text-dark); font-size: 14px; font-weight: 600;
  cursor: pointer; margin-bottom: 2px; white-space: nowrap;
}
.nav-tab:hover { background: var(--bg); }
.nav-tab.active { background: #ecfdf5; color: var(--teal-dark); }
.nav-tab .icon { width: 18px; text-align: center; flex-shrink: 0; }

.device-list { padding: 4px 8px 20px; }
.device-item {
  display: flex; align-items: flex-start; gap: 10px; padding: 10px 8px;
  border-radius: 8px; cursor: pointer; margin-bottom: 2px; white-space: nowrap;
}
.device-item:hover { background: var(--bg); }
.device-item.selected { background: #ecfdf5; }

.device-status-dot { width: 9px; height: 9px; border-radius: 50%; margin-top: 5px; flex-shrink: 0; }
.device-status-dot.online { background: var(--green); }
.device-status-dot.offline { background: #d1d5db; }

.device-name { font-size: 13.5px; font-weight: 600; color: var(--text-dark); }
.device-meta { font-size: 12px; color: var(--text-mid); margin-top: 1px; }

/* ---------------- Main content ---------------- */

.main-content { margin-left: var(--sidebar-w); margin-top: var(--topbar-h); padding: 24px; transition: margin-left 0.2s; }
.sidebar.collapsed ~ .main-content { margin-left: var(--sidebar-w-collapsed); }

.page-title { font-size: 22px; font-weight: 800; margin: 0 0 4px; }
.page-subtitle { color: var(--text-mid); font-size: 13.5px; margin: 0 0 24px; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; }
.stat-card .stat-label { font-size: 12px; color: var(--text-mid); text-transform: uppercase; letter-spacing: 0.4px; font-weight: 700; }
.stat-card .stat-value { font-size: 28px; font-weight: 800; margin-top: 6px; color: var(--text-dark); }
.stat-card .stat-value.teal { color: var(--teal); }
.stat-card .stat-value.warn { color: var(--warn); }
.stat-card .stat-value.danger { color: var(--danger); }

.section { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.section-title { font-size: 15px; font-weight: 700; margin: 0 0 14px; }
.section-title-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.section-title-row .section-title { margin: 0; }

.area-row { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border); }
.area-row:last-child { border-bottom: none; }
.area-info { display: flex; align-items: center; gap: 12px; }
.area-rank {
  width: 26px; height: 26px; border-radius: 50%; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: var(--text-mid); flex-shrink: 0;
}
.area-name { font-weight: 600; font-size: 14px; }
.area-devices { font-size: 12px; color: var(--text-mid); }
.area-metrics { display: flex; gap: 18px; text-align: right; }
.area-metric-label { font-size: 11px; color: var(--text-mid); }
.area-metric-value { font-size: 15px; font-weight: 700; }

.pm-badge { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 700; }
.pm-badge.good { background: #ecfdf5; color: #059669; }
.pm-badge.moderate { background: #fffbeb; color: #d97706; }
.pm-badge.poor { background: #fef2f2; color: #dc2626; }

.device-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.device-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; cursor: pointer; transition: box-shadow 0.15s; }
.device-card:hover { box-shadow: 0 2px 10px rgba(0,0,0,0.06); }
.device-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 10px; }
.device-card-name { font-weight: 700; font-size: 14.5px; }
.device-card-area { font-size: 12px; color: var(--text-mid); }
.device-card-readings { display: flex; gap: 20px; margin-top: 10px; }
.reading-block .reading-label { font-size: 11px; color: var(--text-mid); }
.reading-block .reading-value { font-size: 20px; font-weight: 800; }
.reading-block .reading-unit { font-size: 11px; color: var(--text-mid); font-weight: 500; }
.device-card-mode { font-size: 11px; color: var(--text-mid); margin-top: 8px; }

.view { display: none; }
.view.active { display: block; }

/* ---------------- Device Detail view ---------------- */

.btn-back {
  background: none; border: 1px solid var(--border); color: var(--text-mid);
  padding: 7px 14px; border-radius: 7px; font-size: 13px; font-weight: 600; margin-bottom: 16px;
}
.btn-back:hover { border-color: var(--teal); color: var(--teal); }

.device-detail-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  flex-wrap: wrap; gap: 12px; margin-bottom: 16px;
}

.mode-pill {
  padding: 8px 18px; border-radius: 20px; font-size: 14px; font-weight: 700;
  background: #f3f4f6; color: var(--text-mid); white-space: nowrap;
}
.mode-pill.running { background: #ecfdf5; color: #059669; }
.mode-pill.standby { background: #eff6ff; color: var(--blue); }
.mode-pill.idle { background: #f3f4f6; color: var(--text-mid); }
.mode-pill.emergency { background: #fef2f2; color: var(--danger); }
.mode-pill.overload { background: #fffbeb; color: var(--warn); }

.alert-banner {
  background: #fef2f2; border: 1px solid #fecaca; color: var(--danger);
  padding: 12px 16px; border-radius: 10px; font-size: 13.5px; font-weight: 600; margin-bottom: 20px;
}

.state-chip-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; }
.state-chip {
  border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; background: var(--bg);
}
.state-chip-label { font-size: 11px; color: var(--text-mid); text-transform: uppercase; letter-spacing: 0.4px; font-weight: 700; margin-bottom: 6px; }
.state-chip-value { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.state-dot { width: 10px; height: 10px; border-radius: 50%; background: #d1d5db; flex-shrink: 0; }
.state-dot.on { background: var(--green); }
.state-dot.alert { background: var(--danger); }

.time-range-buttons { display: flex; gap: 6px; }
.range-btn {
  border: 1px solid var(--border); background: white; color: var(--text-mid);
  padding: 7px 14px; border-radius: 7px; font-size: 13px; font-weight: 600;
}
.range-btn:hover { border-color: var(--teal); color: var(--teal); }
.range-btn.active { background: var(--teal); border-color: var(--teal); color: white; }

/* ---------------- Reports view ---------------- */

.report-controls {
  display: flex; gap: 16px; flex-wrap: wrap; align-items: flex-end;
  margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--border);
}
.report-field { display: flex; flex-direction: column; gap: 6px; min-width: 180px; }
.report-field label { font-size: 12px; font-weight: 600; color: var(--text-mid); }
.report-field select, .report-field input {
  padding: 9px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 13.5px; font-family: inherit; background: white;
}

.report-format-choice { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.format-card { border: 1px solid var(--border); border-radius: 12px; padding: 22px 20px; text-align: center; background: var(--bg); }
.format-icon { font-size: 34px; margin-bottom: 10px; }
.format-name { font-weight: 700; font-size: 15px; margin-bottom: 8px; }
.format-desc { font-size: 12.5px; color: var(--text-mid); line-height: 1.5; margin-bottom: 16px; min-height: 55px; }
.format-btn { width: auto; padding: 10px 24px; display: inline-block; }
.btn-excel { background: var(--teal); }
.btn-excel:hover { background: var(--teal-dark); }

#reportStatus { padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-top: 20px; }
#reportStatus.loading { background: #f0fdfa; color: var(--teal-dark); }
#reportStatus.error { background: #fef2f2; color: var(--danger); }
#reportStatus.success { background: #ecfdf5; color: var(--green-dark); }

/* ---------------- Map view ---------------- */

#mapContainer { border-radius: 12px; }
.leaflet-popup-content-wrapper { border-radius: 10px; }
.map-popup { font-family: inherit; }
.map-popup .popup-title { font-weight: 700; font-size: 14px; margin-bottom: 4px; }
.map-popup .popup-area { font-size: 12px; color: var(--text-mid); margin-bottom: 8px; }
.map-popup .popup-readings { display: flex; gap: 16px; }
.map-popup .popup-reading-label { font-size: 10px; color: var(--text-mid); }
.map-popup .popup-reading-value { font-size: 16px; font-weight: 800; }
.map-popup .popup-updated { font-size: 11px; color: #9ca3af; margin-top: 8px; }

/* ---------------- Responsive ---------------- */

@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.mobile-open { transform: translateX(0); width: 260px; box-shadow: 4px 0 24px rgba(0,0,0,0.12); }
  .sidebar.mobile-open .device-name,
  .sidebar.mobile-open .device-meta,
  .sidebar.mobile-open .sidebar-section-title,
  .sidebar.mobile-open .sidebar-search,
  .sidebar.mobile-open .nav-label,
  .sidebar.mobile-open .device-item { display: block; }
  .sidebar.mobile-open .nav-tab { justify-content: flex-start; padding: 10px 12px; }
  .main-content { margin-left: 0 !important; }
  .sidebar.collapsed ~ .main-content { margin-left: 0; }
}

@media (max-width: 560px) {
  .main-content { padding: 16px; }
  .topbar { padding: 0 12px; }
  .topbar-right span.user-name { display: none; }
  .stat-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
  .area-metrics { gap: 10px; }
  .login-card { padding: 28px 22px; }
  #mapContainer { height: 60vh !important; }
  .report-format-choice { grid-template-columns: 1fr; }
  .brand-logo-topbar { height: 24px; }
  .brand-logo-login { height: 34px; }
  .device-detail-header { flex-direction: column; }
}

.mobile-backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.35); z-index: 80; }
.mobile-backdrop.show { display: block; }