*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-padding-block-start: 4.5rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-text-primary);
  background-color: var(--color-bg-canvas);
}

.skip-link {
  position: absolute;
  inset-block-start: -3rem;
  inset-inline-start: var(--space-4);
  background: var(--color-accent-solid);
  color: #ffffff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus-visible {
  inset-block-start: var(--space-3);
}

.hidden {
  display: none !important;
}

.app-shell {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
}

.sidebar {
  background: var(--color-bg-nav);
  color: var(--color-text-on-nav);
  padding: var(--space-6) var(--space-5);
  position: sticky;
  inset-block-start: 0;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  border-inline-end: 1px solid #1d2e3a;
}

.brand-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-block-end: var(--space-6);
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  display: block;
}

.brand-titles {
  min-width: 0;
}

.brand-name {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: #ffffff;
  display: block;
  line-height: 1.2;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--color-text-nav-muted);
  display: block;
  margin-block-start: 2px;
}

.workspace-badge {
  padding: var(--space-3);
  background: var(--color-bg-nav-elevated);
  border: 1px solid #243846;
  border-radius: var(--radius-md);
  margin-block-end: var(--space-6);
}

.workspace-badge strong {
  font-size: 0.8125rem;
  font-weight: 600;
  display: block;
  color: #ffffff;
}

.workspace-badge span {
  font-size: 0.75rem;
  color: var(--color-text-nav-muted);
  display: block;
  margin-block-start: 2px;
}

.nav-group-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-nav-muted);
  margin: 0 var(--space-3) var(--space-2);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-footer {
  margin-block-start: auto;
  padding-block-start: var(--space-4);
  border-block-start: 1px solid #1f313e;
}

.access-indicator {
  font-size: 0.75rem;
  color: var(--color-text-nav-muted);
  margin-block-end: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.account-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.account-meta {
  min-width: 0;
  flex: 1;
}

.account-meta strong {
  font-size: 0.8125rem;
  font-weight: 600;
  display: block;
  color: #ffffff;
}

.account-meta small {
  font-size: 0.75rem;
  color: var(--color-text-nav-muted);
  display: block;
}

.workspace-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  min-height: 4rem;
  background: var(--color-bg-surface);
  border-block-end: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-8);
  position: sticky;
  inset-block-start: 0;
  z-index: 10;
}

.breadcrumb {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

.stream-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

.main-container {
  width: 100%;
  max-width: 1560px;
  margin-inline: auto;
  padding: var(--space-8);
  flex: 1;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-6);
  margin-block-end: var(--space-8);
  flex-wrap: wrap;
}

.page-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-text);
  margin-block-end: var(--space-1);
}

.page-title {
  font-size: 1.75rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0;
  text-wrap: balance;
}

.page-subtitle {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 68ch;
  text-wrap: pretty;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.summary-ledger {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--space-6);
  padding: var(--space-5) 0 var(--space-6);
  border-block: 1px solid var(--color-border-subtle);
  margin-block-end: var(--space-8);
}

.summary-item {
  padding-inline-start: var(--space-4);
  border-inline-start: 2px solid var(--color-accent-brand);
  min-width: 0;
}

.summary-item.neutral {
  border-inline-start-color: var(--slate-300);
}

.summary-item.warn {
  border-inline-start-color: var(--amber-700);
}

.summary-item.danger {
  border-inline-start-color: var(--red-700);
}

.summary-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-block-end: var(--space-1);
}

.summary-value {
  font-size: 1.875rem;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

.summary-value small {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-inline-start: var(--space-1);
}

.summary-detail {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-block-start: var(--space-1);
  font-variant-numeric: tabular-nums;
}

.workspace-section {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  margin-block-end: var(--space-6);
  overflow: hidden;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-block-end: 1px solid var(--color-border-subtle);
  flex-wrap: wrap;
}

.section-header h2 {
  font-size: 1.0625rem;
  line-height: 1.3;
  font-weight: 600;
  margin: 0;
}

.section-header p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 4px 0 0;
  max-width: 70ch;
}

.section-body {
  padding: var(--space-5) var(--space-6);
}

.split-analytics {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: var(--space-6);
  margin-block-end: var(--space-6);
}

.inbox-split {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  min-height: 640px;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.contact-pane {
  border-inline-end: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  max-height: 740px;
}

.contact-scroll {
  overflow-y: auto;
  flex: 1;
}

.thread-pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  max-height: 740px;
}

.operations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-6);
  margin-block-end: var(--space-6);
}

.mobile-nav {
  display: none;
}

.workspace-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-block-start: var(--space-6);
  border-block-start: 1px solid var(--color-border-subtle);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 212px minmax(0, 1fr);
  }
  .main-container {
    padding: var(--space-6);
  }
  .topbar {
    padding-inline: var(--space-6);
  }
  .split-analytics {
    grid-template-columns: minmax(0, 1fr);
  }
  .inbox-split {
    grid-template-columns: 260px minmax(0, 1fr);
  }
}

@media (max-width: 820px) {
  .app-shell {
    display: block;
  }
  .sidebar {
    display: none;
  }
  .mobile-nav {
    display: flex;
    gap: var(--space-2);
    overflow-x: auto;
    padding-block-end: var(--space-3);
    margin-block-end: var(--space-5);
    border-block-end: 1px solid var(--color-border-subtle);
  }
  .topbar {
    padding-inline: var(--space-4);
  }
  .main-container {
    padding: var(--space-5) var(--space-4);
  }
  .inbox-split {
    grid-template-columns: minmax(0, 1fr);
  }
  .contact-pane {
    border-inline-end: 0;
    border-block-end: 1px solid var(--color-border-subtle);
    max-height: 260px;
  }
  .operations-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 480px) {
  .summary-ledger {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-4);
  }
  .section-header,
  .section-body {
    padding: var(--space-4);
  }
  .page-title {
    font-size: 1.4375rem;
  }
}