/* ==========================================================================
   FrigoSense Unified Application Header Styles
   Consistent responsive dark theme across Basic, Pro, and R&D Lab.
   ========================================================================== */

:root {
  --fgs-header-bg: rgba(14, 14, 14, 0.96);
  --fgs-header-border: rgba(255, 255, 255, 0.14);
  --fgs-header-item-bg: #141414;
  --fgs-header-item-border: rgba(255, 255, 255, 0.16);
  --fgs-header-item-hover: rgba(255, 255, 255, 0.08);
  --fgs-header-text: #ffffff;
  --fgs-header-text-muted: rgba(255, 255, 255, 0.7);
  --fgs-header-accent: #0d9488;
  --fgs-header-accent-light: #14b8a6;
}

#fgsAppHeader {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--fgs-header-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--fgs-header-border);
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--fgs-header-text);
  box-sizing: border-box;
}

.fgs-app-header {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 8px 16px;
  box-sizing: border-box;
}

/* Primary Header Row */
.fgs-header-row-primary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

/* Brand Group */
.fgs-header-brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.fgs-header-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: inherit;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.02em;
  transition: opacity 0.15s ease;
}

.fgs-header-brand-link:hover {
  opacity: 0.85;
}

.fgs-header-logo {
  width: 28px;
  height: 28px;
  display: block;
}

.fgs-header-brand-title {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Connection Status Badge */
.fgs-header-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s ease;
  user-select: none;
}

.fgs-header-status-badge.status-online {
  border: 1px solid rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
}

.fgs-header-status-badge.status-stale {
  border: 1px solid rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.12);
  color: #fbbf24;
}

.fgs-header-status-badge.status-no_data {
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(148, 163, 184, 0.12);
  color: #94a3b8;
}

.fgs-header-status-badge.status-demo {
  border: 1px solid rgba(14, 165, 233, 0.3);
  background: rgba(14, 165, 233, 0.12);
  color: #38bdf8;
}

.fgs-header-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 9999px;
  flex-shrink: 0;
}

.status-online .fgs-header-status-dot {
  background-color: #34d399;
  box-shadow: 0 0 6px rgba(52, 211, 153, 0.6);
}

.status-stale .fgs-header-status-dot {
  background-color: #fbbf24;
  box-shadow: 0 0 6px rgba(251, 191, 36, 0.6);
}

.status-no_data .fgs-header-status-dot {
  background-color: #94a3b8;
}

.status-demo .fgs-header-status-dot {
  background-color: #38bdf8;
  box-shadow: 0 0 6px rgba(56, 189, 248, 0.6);
}

/* 3-Tier Switcher Nav */
.fgs-header-tier-switcher {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.04);
  padding: 3px;
  border-radius: 9999px;
  border: 1px solid var(--fgs-header-border);
  gap: 2px;
}

.fgs-tier-tab-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  color: var(--fgs-header-text-muted);
  transition: all 0.15s ease;
  white-space: nowrap;
}

.fgs-tier-tab-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.fgs-tier-tab-link.active {
  background: var(--fgs-header-accent);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.35);
}

/* Actions Group */
.fgs-header-actions-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

/* Unified Pills, Inputs, Selects & Buttons */
.fgs-header-select {
  background-color: var(--fgs-header-item-bg);
  border: 1px solid var(--fgs-header-item-border);
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 10px;
  padding: 6px 10px;
  height: 32px;
  box-sizing: border-box;
  outline: none;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.fgs-header-select:hover {
  border-color: rgba(255, 255, 255, 0.28);
}

.fgs-header-select:focus {
  border-color: var(--fgs-header-accent-light);
}

.fgs-header-device-select {
  max-width: 220px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11.5px;
}

.fgs-header-lang-select {
  width: 58px;
}

.fgs-header-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: var(--fgs-header-item-bg);
  border: 1px solid var(--fgs-header-item-border);
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 10px;
  padding: 6px 12px;
  height: 32px;
  box-sizing: border-box;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  user-select: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.fgs-header-btn:hover {
  background-color: var(--fgs-header-item-hover);
  border-color: rgba(255, 255, 255, 0.28);
}

.fgs-header-icon-btn {
  width: 32px;
  padding: 0;
}

.fgs-header-pill-btn {
  border-radius: 9999px;
  padding: 5px 12px;
}

.fgs-header-btn-primary {
  background-color: #2563eb;
  border-color: #3b82f6;
  color: #ffffff;
}

.fgs-header-btn-primary:hover {
  background-color: #1d4ed8;
}

.fgs-header-btn-danger {
  border-color: rgba(239, 68, 68, 0.4);
  background: rgba(239, 68, 68, 0.1);
  color: #f87171;
}

.fgs-header-btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.6);
}

/* User Badge */
.fgs-header-user-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  font-size: 11.5px;
  font-weight: 600;
  max-width: 140px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.fgs-header-user-badge:hover {
  background: rgba(255, 255, 255, 0.14);
}

.fgs-user-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 9999px;
  background-color: #34d399;
  flex-shrink: 0;
}

/* Device Actions Dropdown */
.fgs-header-dropdown-wrap {
  position: relative;
  display: inline-block;
}

.fgs-header-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background-color: #161616;
  border: 1px solid var(--fgs-header-item-border);
  border-radius: 12px;
  padding: 6px;
  min-width: 210px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.fgs-header-dropdown-menu[hidden] {
  display: none;
}

.fgs-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  background: transparent;
  border: none;
  color: #e2e8f0;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.15s ease;
  width: 100%;
  box-sizing: border-box;
}

.fgs-dropdown-item:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.fgs-dropdown-item-danger {
  color: #f87171;
}

.fgs-dropdown-item-danger:hover {
  background-color: rgba(239, 68, 68, 0.15);
}

.fgs-dropdown-close {
  align-self: flex-end;
  background: none;
  border: none;
  color: #94a3b8;
  cursor: pointer;
  padding: 4px;
  font-size: 14px;
}

/* Secondary Row */
.fgs-header-row-secondary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 11.5px;
  color: var(--fgs-header-text-muted);
  gap: 10px;
}

.fgs-header-sub-left,
.fgs-header-sub-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.fgs-header-last-update {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.fgs-last-update-value {
  color: #ffffff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.fgs-org-selector-wrap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.fgs-org-label {
  color: var(--fgs-header-text-muted);
  font-size: 11.5px;
}

.fgs-header-org-select {
  height: 26px;
  padding: 2px 8px;
  font-size: 11.5px;
  border-radius: 8px;
  max-width: 180px;
}

.fgs-header-fleet-btn {
  height: 26px;
  padding: 2px 10px;
  font-size: 11.5px;
  border-radius: 8px;
  background: rgba(14, 165, 233, 0.12);
  border-color: rgba(14, 165, 233, 0.3);
  color: #38bdf8;
}

.fgs-header-fleet-btn:hover {
  background: rgba(14, 165, 233, 0.22);
}

/* Mobile & Viewport Adjustments */
@media (max-width: 768px) {
  .fgs-app-header {
    padding: 6px 12px;
  }
  .fgs-header-brand-title {
    font-size: 13.5px;
  }
  .fgs-header-tier-switcher {
    order: 3;
    width: 100%;
    justify-content: center;
    margin-top: 2px;
  }
  .fgs-tier-tab-link {
    flex: 1;
    justify-content: center;
    padding: 5px 8px;
    font-size: 11px;
  }
  .fgs-header-device-select {
    max-width: 140px;
  }
  .fgs-header-user-badge {
    max-width: 100px;
  }
}

@media (max-width: 375px) {
  .fgs-app-header {
    padding: 4px 8px;
  }
  .fgs-header-actions-group {
    gap: 4px;
  }
  .fgs-header-device-select {
    max-width: 120px;
    font-size: 10.5px;
    padding: 4px 6px;
  }
  .fgs-header-select {
    font-size: 11px;
    padding: 4px 6px;
  }
  .fgs-header-btn {
    padding: 4px 8px;
    font-size: 11px;
  }
  .fgs-header-btn.fgs-header-icon-btn {
    width: 28px;
    height: 28px;
  }
}

/* Desktop layout (including 1280px–1400px): strictly single-line header row, no wrap on logout */
@media (min-width: 1024px) {
  .fgs-header-row-primary {
    flex-wrap: nowrap;
    gap: 12px;
  }
  .fgs-header-actions-group {
    flex-wrap: nowrap;
    gap: 8px;
    flex-shrink: 0;
  }
  #logoutBtn {
    flex-shrink: 0;
    white-space: nowrap;
  }
}