/* =========================================================
   Responsive Breakpoints — Mobile First, Tablet & Desktop
   ========================================================= */

/* Mobile Bottom Navigation Bar */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(14, 20, 36, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-subtle);
  padding: 8px 12px calc(8px + var(--safe-bottom)) 12px;
  z-index: 4000;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 8px;
  transition: all 0.2s ease;
}

.mobile-nav-item svg {
  width: 20px;
  height: 20px;
}

.mobile-nav-item.active {
  color: var(--accent-emerald);
}

.mobile-nav-item.active svg {
  stroke: var(--accent-emerald);
}

/* Mobile Screens (< 768px) */
@media (max-width: 767px) {
  #appContainer {
    padding: 12px 12px calc(76px + var(--safe-bottom)) 12px;
  }

  .desktop-nav {
    display: none; /* Switch to bottom navigation on mobile */
  }

  .mobile-bottom-nav {
    display: flex;
  }

  .brand-title p {
    display: none;
  }

  .brand-title h1 {
    font-size: 14px;
  }

  .kpi-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .kpi-card {
    padding: 12px 14px;
  }

  .kpi-val {
    font-size: 18px;
  }

  .panel-card {
    padding: 14px 16px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .modal-content {
    padding: 18px 16px;
    border-radius: var(--radius-lg);
  }
}

/* Small Phone Screens (< 380px) */
@media (max-width: 380px) {
  .kpi-grid {
    grid-template-columns: 1fr;
  }
}

/* Tablet Screens (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
  .kpi-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .dashboard-row.two-col {
    grid-template-columns: 1fr;
  }
}

/* Desktop Screens (> 1024px) */
@media (min-width: 1025px) {
  .kpi-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}