/* ============================================================
   36nine Design Hub : data-display + navigation layer (.dv-)
   Built on tokens.css. Square geometry, corner brackets,
   notched CTAs, hairline borders, Exo 2. Extends ds.css;
   the data table (.tbl) already lives there and is not redefined.
   Status uses global --status-positive / --status-danger / --status-warn.
   ============================================================ */

/* Shared focus ring for every interactive control in this layer */
.dv-tab:focus-visible,
.dv-utab:focus-visible,
.dv-crumbs a:focus-visible,
.dv-page a:focus-visible,
.dv-page button:focus-visible,
.dv-accordion__trigger:focus-visible,
.dv-avatar:focus-visible {
  outline: 2px solid var(--brand-creation);
  outline-offset: 2px;
}

/* ============================================================
   TABS : segmented
   role="tablist" wrapper, role="tab" buttons, role="tabpanel".
   Reuses the ds.css segmented look but is self-contained here.
   ============================================================ */
.dv-tabs { display: flex; flex-direction: column; gap: var(--space-5); }

.dv-tabs__list {
  display: inline-flex; align-self: flex-start;
  border: 1px solid var(--border); background: var(--bg-muted); padding: 3px;
}
.dv-tab {
  font-family: var(--font-sans); font-size: var(--text-xs); font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-wide); text-transform: uppercase;
  min-height: 44px; padding: 0 var(--space-4);
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; border: 0; background: transparent; color: var(--fg-subtle);
  transition: color var(--dur-fast) var(--ease-standard),
              background var(--dur-fast) var(--ease-standard);
}
.dv-tab:hover { color: var(--fg); }
.dv-tab[aria-selected="true"] {
  background: var(--bg); color: var(--brand-creation); box-shadow: var(--shadow-xs);
}
.dv-tab[aria-disabled="true"] { opacity: 0.4; cursor: not-allowed; }
.dv-tab .dv-tab__count {
  font-family: ui-monospace, SFMono-Regular, monospace; font-size: 10px;
  color: var(--fg-muted); font-variant-numeric: tabular-nums;
}
.dv-tab[aria-selected="true"] .dv-tab__count { color: var(--brand-creation); }

/* ============================================================
   TABS : underline
   Same ARIA contract; a bottom rail carries the active state.
   ============================================================ */
.dv-utabs__list {
  display: flex; gap: var(--space-6); align-items: stretch;
  border-bottom: 1px solid var(--border);
}
.dv-utab {
  position: relative; font-family: var(--font-sans);
  font-size: var(--text-sm); font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wide); text-transform: uppercase;
  min-height: 44px; padding: 0 2px var(--space-1);
  display: inline-flex; align-items: center; gap: 6px;
  cursor: pointer; border: 0; background: transparent; color: var(--fg-subtle);
  transition: color var(--dur-fast) var(--ease-standard);
}
.dv-utab::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: transparent;
}
.dv-utab:hover { color: var(--fg); }
.dv-utab[aria-selected="true"] { color: var(--brand-creation); }
.dv-utab[aria-selected="true"]::after { background: var(--brand-creation); }
.dv-utab[aria-disabled="true"] { opacity: 0.4; cursor: not-allowed; }

/* Shared tab panel */
.dv-tabpanel { padding-top: var(--space-2); }
.dv-tabpanel[hidden] { display: none; }
.dv-tabpanel:focus-visible { outline: 2px solid var(--brand-creation); outline-offset: 2px; }

/* ============================================================
   BREADCRUMBS
   nav[aria-label] > ol; last item aria-current="page".
   ============================================================ */
.dv-crumbs { font-size: var(--text-xs); }
.dv-crumbs__list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-1);
}
.dv-crumbs__item { display: inline-flex; align-items: center; gap: var(--space-1); }
.dv-crumbs a {
  color: var(--fg-subtle); text-transform: uppercase; letter-spacing: var(--tracking-wide);
  font-weight: var(--fw-semibold); padding: 2px 2px;
  transition: color var(--dur-fast) var(--ease-standard);
}
.dv-crumbs a:hover { color: var(--brand-creation); opacity: 1; }
.dv-crumbs__sep {
  color: var(--fg-muted); font-family: ui-monospace, SFMono-Regular, monospace;
  user-select: none; line-height: 1;
}
.dv-crumbs [aria-current="page"] {
  color: var(--fg); text-transform: uppercase; letter-spacing: var(--tracking-wide);
  font-weight: var(--fw-bold);
}

/* ============================================================
   PAGINATION
   nav[aria-label] > ul; active link carries aria-current="page".
   Numerics are monospace + tabular. Square, hairline, 44px targets.
   ============================================================ */
.dv-page__list {
  list-style: none; margin: 0; padding: 0;
  display: flex; align-items: center; gap: 0;
}
.dv-page__item { display: inline-flex; }
.dv-page a,
.dv-page button.dv-page__link {
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs); font-weight: var(--fw-bold);
  min-width: 44px; min-height: 44px; padding: 0 var(--space-3);
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); margin-left: -1px; /* collapse to shared hairline */
  background: var(--bg); color: var(--fg); cursor: pointer;
  transition: background var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}
.dv-page__item:first-child a,
.dv-page__item:first-child button.dv-page__link { margin-left: 0; }
.dv-page a:hover,
.dv-page button.dv-page__link:hover { background: var(--bg-muted); opacity: 1; }
.dv-page [aria-current="page"] {
  background: var(--brand-creation); border-color: var(--brand-creation);
  color: #fff; position: relative; z-index: 1;
}
.dv-page [aria-current="page"]:hover { background: var(--creation-600); color: #fff; }
.dv-page__ellipsis {
  font-family: ui-monospace, SFMono-Regular, monospace; color: var(--fg-muted);
  min-width: 44px; min-height: 44px; margin-left: -1px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); background: var(--bg);
}
.dv-page__edge { text-transform: uppercase; letter-spacing: var(--tracking-wide); font-family: var(--font-sans); }
.dv-page [aria-disabled="true"],
.dv-page button.dv-page__link:disabled {
  opacity: 0.4; cursor: not-allowed; pointer-events: none;
}
.dv-page__status {
  font-family: ui-monospace, SFMono-Regular, monospace; font-size: 11px;
  color: var(--fg-muted); text-transform: uppercase; letter-spacing: var(--tracking-wide);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   ACCORDION
   Each header is a <button aria-expanded> controlling a region.
   ============================================================ */
.dv-accordion { border: 1px solid var(--border); background: var(--bg); }
.dv-accordion__item { border-bottom: 1px solid var(--border); }
.dv-accordion__item:last-child { border-bottom: 0; }

.dv-accordion__trigger {
  width: 100%; min-height: 44px;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-4) var(--space-5); cursor: pointer;
  border: 0; background: transparent; color: var(--fg); text-align: left;
  font-family: var(--font-sans); font-size: var(--text-sm); font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-wide); text-transform: uppercase;
  transition: background var(--dur-fast) var(--ease-standard);
}
.dv-accordion__trigger:hover { background: var(--bg-muted); }
.dv-accordion__lead { display: inline-flex; align-items: center; gap: var(--space-3); min-width: 0; }
.dv-accordion__idx {
  font-family: ui-monospace, SFMono-Regular, monospace; font-size: var(--text-xs);
  color: var(--fg-muted); font-variant-numeric: tabular-nums;
}
/* Chevron drawn from borders, no icon font needed */
.dv-accordion__icon {
  flex: 0 0 auto; width: 8px; height: 8px; margin-right: 2px;
  border-right: 1.5px solid var(--fg-subtle); border-bottom: 1.5px solid var(--fg-subtle);
  transform: rotate(45deg); transition: transform var(--dur-base) var(--ease-standard);
}
.dv-accordion__trigger[aria-expanded="true"] .dv-accordion__icon {
  transform: rotate(-135deg); border-color: var(--brand-creation);
}
.dv-accordion__trigger[aria-expanded="true"] { color: var(--brand-creation); }

.dv-accordion__panel {
  padding: 0 var(--space-5) var(--space-5) var(--space-5);
  font-size: var(--text-sm); color: var(--fg-subtle); line-height: var(--lh-relaxed);
}
.dv-accordion__panel[hidden] { display: none; }

/* ============================================================
   AVATAR + AVATAR GROUP
   Square by house rule. Image, or initials fallback.
   ============================================================ */
.dv-avatar {
  --dv-av-size: 40px;
  position: relative; flex: 0 0 auto;
  width: var(--dv-av-size); height: var(--dv-av-size);
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bg-muted); color: var(--fg); border: 1px solid var(--border);
  overflow: hidden; user-select: none;
}
.dv-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.dv-avatar__initials {
  font-family: ui-monospace, SFMono-Regular, monospace; font-weight: var(--fw-bold);
  font-size: calc(var(--dv-av-size) * 0.36); letter-spacing: 0.02em;
  text-transform: uppercase; color: var(--fg-subtle);
}
.dv-avatar--accent { background: var(--brand-creation); border-color: var(--brand-creation); }
.dv-avatar--accent .dv-avatar__initials { color: #fff; }
.dv-avatar--xs { --dv-av-size: 24px; }
.dv-avatar--sm { --dv-av-size: 32px; }
.dv-avatar--lg { --dv-av-size: 56px; }
.dv-avatar--xl { --dv-av-size: 72px; }
/* Presence marker : square notch, bottom-right */
.dv-avatar__status {
  position: absolute; right: -1px; bottom: -1px; width: 9px; height: 9px;
  border: 1.5px solid var(--bg); background: var(--fg-muted);
}
.dv-avatar__status--online { background: var(--status-positive); }
.dv-avatar__status--busy   { background: var(--status-danger); }
.dv-avatar__status--away   { background: var(--fg-muted); }

.dv-avatar-group { display: inline-flex; align-items: center; }
.dv-avatar-group .dv-avatar {
  margin-left: -8px; box-shadow: 0 0 0 2px var(--bg); /* outline to separate stacked squares */
}
.dv-avatar-group .dv-avatar:first-child { margin-left: 0; }
.dv-avatar-group__more {
  margin-left: -8px; box-shadow: 0 0 0 2px var(--bg);
  --dv-av-size: 40px; width: var(--dv-av-size); height: var(--dv-av-size);
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--fg); color: var(--bg); border: 1px solid var(--fg);
  font-family: ui-monospace, SFMono-Regular, monospace; font-size: 12px; font-weight: var(--fw-bold);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   CARD VARIANTS
   Framed card reuses the ds.css corner-bracket recipe locally so
   this fragment is drop-in without depending on .card.
   Each framed card needs two inner spans: <i class="dv-card__c1">
   <i class="dv-card__c2"> for the bottom brackets.
   ============================================================ */
.dv-card {
  position: relative; background: var(--bg); border: 1px solid var(--border);
  padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-4);
}
.dv-card::before, .dv-card::after,
.dv-card > .dv-card__c1, .dv-card > .dv-card__c2 {
  content: ""; position: absolute; width: 8px; height: 8px;
  border: 1.5px solid var(--fg); pointer-events: none; z-index: 2;
}
.dv-card::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.dv-card::after  { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.dv-card > .dv-card__c1 { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.dv-card > .dv-card__c2 { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.dv-card__hd { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); }
.dv-card__title {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: var(--fw-bold);
  text-transform: uppercase; letter-spacing: var(--tracking-wide);
}
.dv-card__title .dv-card__marker { width: 2px; height: 13px; background: var(--brand-creation); flex: 0 0 auto; }
.dv-card__sub { font-size: var(--text-xs); color: var(--fg-subtle); line-height: var(--lh-normal); }
.dv-card__body { font-size: var(--text-sm); color: var(--fg-subtle); line-height: var(--lh-relaxed); }
.dv-card__ft {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding-top: var(--space-4); border-top: 1px solid var(--border);
}

/* Stat card : label, big numeric value, delta. Value is tabular. */
.dv-card--stat { gap: var(--space-2); }
.dv-card--stat .dv-card__k {
  font-size: 10px; font-weight: var(--fw-bold); letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase; color: var(--fg-muted);
}
.dv-card--stat .dv-card__v {
  font-family: ui-monospace, SFMono-Regular, monospace; font-variant-numeric: tabular-nums;
  font-size: var(--text-3xl); font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-tight); color: var(--fg); line-height: 1.05;
}
.dv-card--stat .dv-card__delta {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: ui-monospace, SFMono-Regular, monospace; font-variant-numeric: tabular-nums;
  font-size: var(--text-xs); font-weight: var(--fw-bold);
}
.dv-card__delta--up { color: var(--status-positive); }
.dv-card__delta--down { color: var(--status-danger); }
.dv-card__delta--flat { color: var(--fg-muted); }
.dv-card__delta .dv-card__arrow { font-size: 10px; }

/* Media card : image top, content below. Image bleeds to the border. */
.dv-card--media { padding: 0; gap: 0; overflow: hidden; }
.dv-card--media .dv-card__media {
  position: relative; aspect-ratio: 16 / 9; background: var(--bg-muted);
  border-bottom: 1px solid var(--border); overflow: hidden;
}
.dv-card--media .dv-card__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.dv-card--media .dv-card__media .dv-card__tag { position: absolute; top: var(--space-3); left: var(--space-3); }
.dv-card--media .dv-card__content {
  padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-2);
}
.dv-card--media .dv-card__content .dv-card__title { text-transform: none; letter-spacing: var(--tracking-tight); font-size: var(--text-lg); }

/* Interactive framed card (whole card is a link/button) */
.dv-card--action { text-align: left; cursor: pointer; transition: border-color var(--dur-fast) var(--ease-standard); }
.dv-card--action:hover { border-color: var(--brand-creation); }
.dv-card--action:focus-visible { outline: 2px solid var(--brand-creation); outline-offset: 2px; }

/* ============================================================
   DEFINITION / DETAIL LIST
   Two-column key/value record. Keys uppercase gray, values fg.
   Numeric values right-aligned + tabular via .dv-dl__v--num.
   ============================================================ */
.dv-dl {
  margin: 0; display: grid; grid-template-columns: minmax(120px, max-content) 1fr;
  border: 1px solid var(--border); background: var(--bg);
}
.dv-dl > dt {
  padding: var(--space-3) var(--space-4);
  font-size: 10px; font-weight: var(--fw-bold); letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase; color: var(--fg-muted);
  background: var(--bg-muted); border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
}
.dv-dl > dd {
  margin: 0; padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm); color: var(--fg); border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
}
.dv-dl > dt:nth-last-of-type(1),
.dv-dl > dd:last-child { border-bottom: 0; }
.dv-dl__v--num {
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-variant-numeric: tabular-nums; justify-content: flex-end; text-align: right;
}
/* Stacked variant for narrow columns */
.dv-dl--stack { grid-template-columns: 1fr; }
.dv-dl--stack > dt { border-bottom: 0; padding-bottom: 2px; background: var(--bg); }
.dv-dl--stack > dd { padding-top: 2px; }

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .dv-tab, .dv-utab, .dv-crumbs a, .dv-page a, .dv-page button.dv-page__link,
  .dv-accordion__trigger, .dv-accordion__icon, .dv-card--action { transition: none; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 640px) {
  .dv-tabs__list { display: flex; width: 100%; }
  .dv-tab { flex: 1; }
  .dv-utabs__list { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .dv-page__edge span { display: none; } /* keep the arrow glyph, drop the word */
  .dv-dl { grid-template-columns: 1fr; }
  .dv-dl > dt { border-bottom: 0; padding-bottom: 2px; }
  .dv-dl > dd { padding-top: 2px; }
}