/*
 * App shell: base, grid, topbar, nav, page scaffolding.
 * Tokens live in tokens.css (loaded first). Tables, forms, alerts, and toasts
 * live in components.css.
 */

/* ---------- Base ---------- */

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

html {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.5;
  min-height: 100vh;
}

:focus-visible {
  outline: var(--focus-width) solid var(--color-focus);
  outline-offset: 1px;
}

.app-topbar :focus-visible {
  outline-color: var(--color-focus-on-chrome);
}

/* The account dropdown is inside the topbar but renders on a surface, not
   chrome: the on-chrome (white) ring would vanish on it in light theme. */
.session-dropdown :focus-visible {
  outline-color: var(--color-focus);
}

.icon {
  width: var(--icon-md);
  height: var(--icon-md);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

.icon-sm {
  width: var(--icon-sm);
  height: var(--icon-sm);
}

.u-tabular {
  font-variant-numeric: tabular-nums;
}

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

.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  grid-template-rows: var(--topbar-height) minmax(0, 1fr);
  min-height: 100vh;
}

.app-topbar {
  grid-column: 1 / -1;
  grid-row: 1;
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--topbar-height);
  padding: 0 var(--space-4);
  background: var(--color-chrome);
  color: var(--color-chrome-text);
  border-top: 2px solid var(--color-action);
  border-bottom: var(--border-width) solid var(--color-chrome-border);
}

.app-sidebar {
  grid-column: 1;
  grid-row: 2;
  position: sticky;
  top: var(--topbar-height);
  height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
  background: var(--color-surface);
  border-right: var(--border-width) solid var(--color-border);
  padding: var(--space-3) var(--space-3) var(--space-6);
  scrollbar-width: thin;
}

/* Capped so an ultrawide monitor does not put a lane and its timestamp two
   feet apart. Tables still fill the width they are given; the cap is on the
   page, not on the data. */
.app-main {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  width: 100%;
  max-width: 100rem;
  margin-inline: auto;
  padding: var(--space-6) var(--space-6) var(--space-10);
}

/* ---------- Topbar contents ---------- */

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text-inverse);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-sm);
  background: var(--color-brand);
  box-shadow: 0 0 1rem var(--color-brand-glow);
  color: var(--color-on-brand);
}

.brand-mark-icon {
  width: 100%;
  height: 100%;
}

.brand-text {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.125rem;
  min-width: 0;
}

.brand-name {
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: 0.28em;
  margin-right: -0.28em; /* tracking adds a trailing gap; keep both lines flush right */
  line-height: 1.1;
  text-transform: uppercase;
}

.brand-tagline {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  margin-right: -0.08em;
  line-height: 1.1;
  text-transform: uppercase;
  color: var(--color-chrome-muted);
}

.topbar-spacer {
  flex: 1;
}

.topbar-env {
  text-transform: uppercase;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--control-height-md);
  height: var(--control-height-md);
  border: 0;
  border-radius: var(--radius-md);
  background: none;
  color: inherit;
  cursor: pointer;
}

.icon-button:hover {
  background: var(--color-chrome-surface);
  color: var(--color-text-inverse);
}

/* ---------- Badges ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  height: 1.25rem;
  padding: 0 var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.badge-warning {
  color: var(--color-warning-text);
  background: var(--color-warning-bg);
  border: var(--border-width) solid var(--color-warning-border);
}

.badge-success {
  color: var(--color-success-text);
  background: var(--color-success-bg);
  border: var(--border-width) solid var(--color-success-border);
}

/* Info shares the interaction hue. */
.badge-info {
  color: var(--color-action-text);
  background: var(--color-action-subtle);
  border: var(--border-width) solid var(--color-action-subtle-hover);
}

/* Neutral carries facts about provenance (reused, masked, defaulted) that
   are neither success nor warning; a coloured badge would read as a verdict. */
.badge-neutral {
  color: var(--color-text-secondary);
  background: var(--color-surface-sunken);
  border: var(--border-width) solid var(--color-border-strong);
}

/* A chip is a badge's quieter sibling: an inline qualifier next to a value,
   not a status of its own. */
.chip {
  display: inline-flex;
  align-items: center;
  height: 1.125rem;
  padding: 0 var(--space-2);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 500;
  white-space: nowrap;
}

/* Only environment and optional implementation metadata use data-sys.
   Operational states must remain visible. */
html[data-sysinfo="hidden"] [data-sys] {
  display: none;
}

/* An explanation nobody knows is there explains nothing: anything carrying one
   says so with the cursor. */
.badge[title],
.chip[title] {
  cursor: help;
}

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

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.nav-group + .nav-group {
  margin-top: var(--space-2);
}

.nav-group-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-1) var(--space-2);
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
}

.nav-group-label:hover {
  color: var(--color-text-secondary);
}

.nav-group-chevron {
  width: var(--icon-sm);
  height: var(--icon-sm);
  transition: transform var(--duration-base) var(--ease-out);
}

.nav-group-label[aria-expanded="false"] .nav-group-chevron {
  transform: rotate(-90deg);
}

.nav-group-label[aria-expanded="false"] + .nav-items {
  display: none;
}

.nav-items {
  list-style: none;
  margin: var(--space-1) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--control-height-md);
  padding: 0 var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-label);
  font-weight: 500;
  text-decoration: none;
}

a.nav-item:hover {
  background: var(--color-surface-sunken);
  color: var(--color-text);
}

.nav-item.is-active {
  background: var(--color-action-subtle);
  color: var(--color-action-text);
}

.nav-item.is-active::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-3));
  width: 3px;
  height: 1.25rem;
  border-radius: 0 3px 3px 0;
  background: var(--color-action);
}

/* ---------- Sidebar collapse (desktop, left nav mode) ---------- */

@media (min-width: 1024px) {
  html[data-sidebar="collapsed"]:not([data-nav="top"]) .app-layout {
    grid-template-columns: var(--sidebar-width-collapsed) minmax(0, 1fr);
  }

  html[data-sidebar="collapsed"]:not([data-nav="top"]) .app-sidebar {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
  }

  html[data-sidebar="collapsed"]:not([data-nav="top"]) .nav-group-chevron,
  html[data-sidebar="collapsed"]:not([data-nav="top"]) .nav-text {
    display: none;
  }

  /* Group labels become inert separators in the icon rail. */
  html[data-sidebar="collapsed"]:not([data-nav="top"]) .nav-group-label {
    justify-content: center;
    font-size: 0;
    border-top: var(--border-width) solid var(--color-border);
    border-radius: 0;
    padding: var(--space-2) 0 0;
    cursor: default;
  }

  html[data-sidebar="collapsed"]:not([data-nav="top"]) .nav-group:first-child .nav-group-label {
    border-top: 0;
    padding-top: 0;
  }

  html[data-sidebar="collapsed"]:not([data-nav="top"]) .nav-item {
    justify-content: center;
    padding: 0;
  }

  html[data-sidebar="collapsed"]:not([data-nav="top"]) .nav-item.is-active::before {
    left: calc(-1 * var(--space-2));
  }

  /* Collapsed rail always shows items, even for accordion-closed groups. */
  html[data-sidebar="collapsed"]:not([data-nav="top"]) .nav-group-label[aria-expanded="false"] + .nav-items {
    display: flex;
  }
}

/* ---------- Top nav mode (desktop only) ---------- */

@media (min-width: 1024px) {
  html[data-nav="top"] .app-layout,
  html[data-nav="top"][data-sidebar="collapsed"] .app-layout {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: var(--topbar-height) auto minmax(0, 1fr);
  }

  html[data-nav="top"] .app-sidebar,
  html[data-nav="top"][data-sidebar="collapsed"] .app-sidebar {
    display: block;
    grid-column: 1 / -1;
    grid-row: 2;
    position: sticky;
    top: var(--topbar-height);
    z-index: calc(var(--z-nav) - 1);
    width: 100%;
    height: auto;
    overflow: visible;
    padding: 0 var(--space-4);
    border-right: 0;
    border-left: 0;
    border-bottom: var(--border-width) solid var(--color-border);
  }

  html[data-nav="top"] .app-main,
  html[data-nav="top"][data-sidebar="collapsed"] .app-main {
    grid-column: 1 / -1;
    grid-row: 3;
  }

  html[data-nav="top"] #sidebar-toggle {
    display: none;
  }

  html[data-nav="top"] .sidebar-nav,
  html[data-nav="top"][data-sidebar="collapsed"] .sidebar-nav {
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
    min-height: 2.75rem;
  }

  html[data-nav="top"] .nav-group,
  html[data-nav="top"] .nav-group + .nav-group {
    position: relative;
    margin: 0;
  }

  html[data-nav="top"] .nav-group-label,
  html[data-nav="top"][data-sidebar="collapsed"] .nav-group-label {
    display: inline-flex;
    width: auto;
    gap: var(--space-1);
    margin: 0;
    height: var(--control-height-md);
    padding: 0 var(--space-2);
    border: 0;
    border-radius: var(--radius-md);
    background: none;
    font-size: var(--text-label);
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-text-secondary);
  }

  html[data-nav="top"] .nav-group-label:hover {
    background: var(--color-surface-sunken);
    color: var(--color-text);
  }

  html[data-nav="top"] .nav-group:has(.nav-item.is-active) > .nav-group-label,
  html[data-nav="top"][data-sidebar="collapsed"] .nav-group:has(.nav-item.is-active) > .nav-group-label {
    background: var(--color-action-subtle);
    color: var(--color-action-text);
  }

  html[data-nav="top"] .nav-group-label .nav-group-chevron,
  html[data-nav="top"][data-sidebar="collapsed"] .nav-group-label .nav-group-chevron {
    display: inline;
    transform: none;
  }

  html[data-nav="top"] .nav-items,
  html[data-nav="top"] .nav-group-label[aria-expanded="false"] + .nav-items,
  html[data-nav="top"][data-sidebar="collapsed"] .nav-items {
    display: none;
  }

  html[data-nav="top"] .nav-group.open > .nav-items,
  html[data-nav="top"][data-sidebar="collapsed"] .nav-group.open > .nav-items {
    display: flex;
    position: absolute;
    left: 0;
    top: calc(100% + 0.25rem);
    z-index: var(--z-dropdown);
    min-width: 14rem;
    background: var(--color-surface);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-1);
  }

  html[data-nav="top"] .nav-item.is-active::before {
    display: none;
  }
}

/* ---------- Mobile: off-canvas drawer (all nav modes) ---------- */

@media (max-width: 1023px) {
  .app-topbar .brand-name,
  .app-topbar .brand-tagline {
    max-width: 100%;
    margin-right: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .app-layout,
  html[data-nav="top"] .app-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .app-main {
    grid-column: 1;
    padding: var(--space-4) var(--space-4) var(--space-8);
  }

  .app-sidebar,
  html[data-nav="top"] .app-sidebar {
    position: fixed;
    inset: var(--topbar-height) auto 0 0;
    width: min(18rem, 85vw);
    visibility: hidden;
    transform: translateX(-100%);
    transition: transform var(--duration-slow) var(--ease-out);
    z-index: var(--z-drawer);
    border-right: var(--border-width) solid var(--color-border);
    border-left: 0;
  }

  html.drawer-open .app-sidebar {
    visibility: visible;
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .drawer-backdrop {
    display: none;
    position: fixed;
    inset: var(--topbar-height) 0 0 0;
    background: var(--overlay-scrim);
    z-index: var(--z-overlay);
  }

  html.drawer-open .drawer-backdrop {
    display: block;
  }

  .session-name {
    display: none;
  }
}

@media (min-width: 1024px) {
  .drawer-backdrop {
    display: none;
  }
}

/* ---------- Page scaffolding ---------- */

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.page-title {
  min-width: 0;
  margin: 0;
  margin-right: auto;
  font-size: var(--text-xl);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.card {
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
}

.card-pad {
  padding: var(--space-5);
}

.card-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: 600;
}

.card-text {
  margin: 0;
  color: var(--color-text-secondary);
  max-width: 65ch;
}

/* A page-level badge belongs with the title, not adrift at the far edge, so
   the title gives up its spacer and the last badge takes it over. */
.page-header:has(.badge) .page-title {
  margin-right: 0;
}

.page-header .badge:last-of-type {
  margin-right: auto;
}

.page-lede {
  max-width: 75ch;
  margin: 0 0 var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-label);
  line-height: 1.6;
}

.page-header:has(+ .page-lede) {
  margin-bottom: var(--space-2);
}

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: var(--border-width) solid var(--color-border);
}

.card-head .card-title {
  margin: 0;
  font-size: var(--text-md);
}

.card-head-link {
  color: var(--color-action-text);
  font-size: var(--text-label);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.card-head-link:hover {
  text-decoration: underline;
}

.section-block {
  margin-top: var(--space-4);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}