/* =============================================================================
   @elements/style — tabs

   Two flavours:

   1. Underline tabs — horizontal row, active gets an ink underline:

        <div class="tabs">
          <button class="is-active">Active</button>
          <button>New</button>
          <button>Top <span class="count">12</span></button>
          <span class="right">filter · last week</span>
        </div>

   2. Segmented group — bordered pill group (platform pickers, etc.):

        <div class="seg">
          <button class="is-active">MacOS</button>
          <button>Linux</button>
          <button>Windows</button>
        </div>

      Rows of segments (e.g. platform + arch) use `.seg-row`.
============================================================================= */

/* ─── Underline tabs ──────────────────────────────────────────────── */

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--rule);
}

.tabs > :where(button, a) {
  padding: 0.5625rem 0.875rem 0.75rem;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--ink-dim);
  font-weight: var(--font-medium);
  cursor: pointer;
  background: transparent;
  border: none;
  border-bottom: 1.5px solid transparent;
  height: auto;
  border-radius: 0;
  margin-bottom: -1px;
  display: flex;
  align-items: center;
  gap: var(--space-1-5);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
.tabs > :where(button, a):first-child { padding-left: 0; }
.tabs > :where(button, a):hover { color: var(--ink-soft); background: transparent; }
.tabs > :where(button, a).is-active,
.tabs > :where(button, a)[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* "· qualifier" inline after a tab name (e.g. "Top · week"). */
.tabs :where(.count) {
  font-size: 0.6875rem;
  color: var(--ink-faint);
  font-weight: var(--font-regular);
  margin-left: 0.375rem;
}
.tabs :where(.count)::before { content: '· '; opacity: 0.6; }

/* Numeric badge (e.g. "Unanswered [4]") — uses a small pill chip. */
.tabs :where(.badge) {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: var(--font-medium);
  background: var(--bg-panel);
  color: var(--ink);
  padding: 1px 0.375rem;
  border-radius: 100px;
  margin-left: 0.4375rem;
  font-variant-numeric: tabular-nums;
  vertical-align: 1px;
}

.tabs :where(.right) {
  margin-left: auto;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  color: var(--ink-dim);
  padding: 0.5625rem 0 0.75rem;
  display: flex;
  align-items: center;
  gap: var(--space-1-5);
}

/* ─── Segmented group ─────────────────────────────────────────── */

.seg {
  display: inline-flex;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg);
}

.seg > :where(button, a) {
  font-family: var(--font-sans);
  font-size: var(--text-2xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: var(--font-bold);
  background: var(--bg);
  color: var(--ink-dim);
  border: none;
  height: auto;
  border-radius: 0;
  padding: var(--space-2) 0.625rem;
  cursor: pointer;
  border-right: 1px solid var(--rule);
  text-decoration: none;
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}
.seg > :where(button, a):last-child { border-right: none; }
.seg > :where(button, a):hover:not(.is-active) {
  color: var(--ink-soft);
  background: var(--bg-soft);
}
.seg > :where(button, a).is-active,
.seg > :where(button, a)[aria-selected="true"] {
  background: var(--accent-soft);
  color: var(--accent-deep);
}
.seg > :where(button, a):focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: -2px;
}

/* Row of .seg groups (platform + arch). */
.seg-row {
  display: flex;
  gap: 0.625rem;
  margin-bottom: var(--space-4);
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.seg-row::-webkit-scrollbar { display: none; }
.seg-row > .seg { flex-shrink: 0; }

@media (max-width: 480px) {
  .seg > :where(button, a) {
    font-size: 0.625rem;
    padding: 0.4375rem 0.5rem;
    letter-spacing: 0.04em;
  }
  .seg-row { gap: 0.5rem; }
}