/* Mobile-first responsive shell */
.app-shell {
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  overflow-x: clip;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(100, 140, 255, 0.09), transparent 60%),
    radial-gradient(700px 380px at 10% -5%, rgba(32, 201, 151, 0.06), transparent 60%),
    var(--bg-primary);
  display: flex;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--blue), var(--green));
  color: #08090C;
  font-weight: 700;
  display: grid;
  place-items: center;
  font-size: 13px;
  flex-shrink: 0;
}

.sidebar {
  display: none;
}

.main-column {
  flex: 1;
  min-width: 0;
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  padding-bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px) + 16px);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  height: var(--topbar-height);
  padding: 0 14px;
  background: rgba(8, 9, 12, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.page-title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.freshness-pill {
  display: none;
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 99px;
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.view-container {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  margin: 0;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Grids */
.kpi-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.charts-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.cards-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

/* Mobile Bottom Nav */
.mobile-bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: rgba(14, 16, 21, 0.94);
  backdrop-filter: blur(18px);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}

.mb-nav-item {
  appearance: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font-size: 10px;
  font-weight: 500;
  min-height: 44px;
  cursor: pointer;
  padding: 4px 2px;
}

.mb-nav-item.active {
  color: var(--blue);
}

.mb-icon svg {
  width: 20px;
  height: 20px;
}

.hide-xs {
  display: none;
}

/* Small smartphones >= 375px */
@media (min-width: 375px) {
  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .hide-xs {
    display: inline;
  }
}

/* Tablets >= 640px */
@media (min-width: 640px) {
  .view-container {
    padding: 20px;
    gap: 20px;
  }
  .freshness-pill {
    display: inline-flex;
  }
  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .charts-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .kpi-grid.kpi-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Desktop >= 900px */
@media (min-width: 900px) {
  .mobile-bottom-nav {
    display: none;
  }
  .main-column {
    padding-bottom: 32px;
  }
  .sidebar {
    display: flex;
    flex-direction: column;
    width: var(--sidebar-width);
    flex-shrink: 0;
    position: sticky;
    top: 0;
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 18px 12px;
    gap: 14px;
  }
  .sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 8px 12px;
    border-bottom: 1px solid var(--border-subtle);
  }
  .brand-text {
    display: flex;
    flex-direction: column;
  }
  .brand-text strong {
    font-size: 14px;
    letter-spacing: -0.02em;
  }
  .brand-text span {
    font-size: 11px;
    color: var(--text-secondary);
  }
  .sidebar-nav {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 3px;
  }
  .nav-group-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 12px 10px 4px;
  }
  .nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
  }
  .nav-item:hover {
    background: var(--surface);
    color: var(--text-primary);
  }
  .nav-item.active {
    background: var(--blue-soft);
    color: var(--text-primary);
    box-shadow: inset 2px 0 0 var(--blue);
  }
  .nav-icon svg {
    width: 17px;
    height: 17px;
    display: block;
  }
  .nav-badge {
    margin-left: auto;
    background: var(--red-soft);
    color: var(--red);
    font-size: 11px;
    font-weight: 600;
    padding: 1px 7px;
    border-radius: 99px;
  }
  .sidebar-footer {
    border-top: 1px solid var(--border-subtle);
    padding-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .plan-pill {
    display: flex;
    align-items: center;
    gap: 9px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 9px 10px;
  }
  .dot-live {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px var(--green);
  }
  .plan-title {
    font-size: 12px;
    font-weight: 600;
  }
  .plan-sub {
    font-size: 11px;
    color: var(--text-secondary);
  }
  .topbar {
    padding: 0 24px;
  }
  .page-title {
    font-size: 18px;
  }
  .view-container {
    padding: 24px;
  }
  .kpi-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .kpi-grid.kpi-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .split-grid {
    grid-template-columns: 1.5fr 1fr;
  }
}

/* Ultrawide >= 1280px */
@media (min-width: 1280px) {
  .cards-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}