/* Use-Cases Gallery — additions on top of explainer.css
   (role sub-nav, before/after example cards, powered-by chips, Both/After toggle) */

/* ───────── sticky sub-bar with the view toggle ───────── */
.subbar {
  position: sticky; top: 64px; z-index: 40; height: 48px; display: flex; align-items: center;
  background: rgba(6,17,46,0.72); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ot-border);
}
.subbar .wrap { display: flex; align-items: center; gap: 16px; }
.subbar .count { font-family: var(--ot-font-mono); font-size: 12px; color: var(--ot-fg-subtle); }
.subbar .count b { color: #fff; }
.seg { margin-left: auto; display: inline-flex; padding: 3px; border-radius: var(--ot-radius-pill); border: 1px solid var(--ot-border-strong); background: rgba(255,255,255,0.03); }
.seg button {
  border: none; background: transparent; cursor: pointer; color: var(--ot-fg-subtle);
  font-family: var(--ot-font-body); font-size: 12.5px; font-weight: 600; padding: 5px 14px;
  border-radius: var(--ot-radius-pill); transition: all var(--ot-duration-fast) var(--ot-ease);
}
.seg button.active { background: var(--ot-blue-500); color: #fff; }

/* ───────── role section ───────── */
.usecases { padding: 72px 0; }
.role-head { max-width: 760px; margin: 0 auto 8px; }
.role-eyebrow {
  font-family: var(--ot-font-body); font-weight: 600; font-size: 13px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--role, var(--ot-blue-300)); display: inline-flex; align-items: center; gap: 8px;
}
.role-eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--role, var(--ot-blue-300)); display: inline-block; }
.role-head h2.disp { margin-top: 12px; }
.role-head .rsub { font-size: 17px; color: var(--ot-fg-muted); margin: 14px 0 0; line-height: 1.55; }

.ex-list { display: flex; flex-direction: column; gap: 22px; margin-top: 36px; }

/* ───────── example card ───────── */
.ex-card {
  border: 1px solid var(--ot-border); border-radius: var(--ot-radius-xl);
  background: var(--ot-surface); padding: 24px 26px; transition: border-color var(--ot-duration) var(--ot-ease);
}
.ex-card:hover { border-color: var(--ot-border-strong); }
.ex-top { display: flex; align-items: baseline; gap: 14px; margin-bottom: 18px; }
.ex-num { font-family: var(--ot-font-mono); font-size: 13px; color: var(--role, var(--ot-blue-300)); font-weight: 600; flex-shrink: 0; }
.ex-title { font-family: var(--ot-font-display); font-weight: 700; font-size: 21px; color: #fff; line-height: 1.2; letter-spacing: -0.01em; margin: 0; }

.ba { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .ba { grid-template-columns: 1fr; } }
.ba-card { border-radius: var(--ot-radius-lg); padding: 18px 20px; border: 1px solid var(--ot-border); }
.ba-card .lab { font-family: var(--ot-font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.ba-card.before { background: rgba(255,255,255,0.02); }
.ba-card.before .lab { color: var(--ot-fg-subtle); }
.ba-card.after { background: color-mix(in srgb, var(--role, #5B7BFF) 8%, transparent); border-color: color-mix(in srgb, var(--role, #5B7BFF) 45%, transparent); }
.ba-card.after .lab { color: var(--role, var(--ot-blue-300)); }
.ba-card ul { margin: 0; padding-left: 17px; }
.ba-card li { font-size: 14.5px; line-height: 1.5; color: var(--ot-fg-muted); margin: 8px 0; }
.ba-card.before li::marker { color: var(--ot-fg-subtle); }
.ba-card.after li::marker { color: var(--role, var(--ot-blue-300)); }
.ba-card li b { color: #fff; font-weight: 600; }

/* ───────── powered-by footer ───────── */
.powered { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--ot-border); }
.pwlabel { font-family: var(--ot-font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ot-fg-subtle); margin-right: 2px; }
.pchip { font-family: var(--ot-font-mono); font-size: 11.5px; padding: 3px 10px; border-radius: var(--ot-radius-pill); border: 1px solid var(--ot-border-strong); color: var(--ot-fg-muted); }
.pchip.f { color: var(--c-frame); border-color: var(--c-frame-line); background: var(--c-frame-soft); }
.pchip.c { color: #c7a6ec; border-color: var(--c-cog-line); background: var(--c-cog-soft); }
.pchip.o { color: var(--ot-coral-400); border-color: var(--c-op-line); background: var(--c-op-soft); }
.pchip.g { color: #fff; border-color: var(--ot-border-strong); }
.pchip.g::before { content: "✓ "; color: var(--ot-coral-400); }

/* ───────── Both / After-only view ───────── */
body.after-only .ba { grid-template-columns: 1fr; }
body.after-only .ba-card.before { display: none; }

/* hero metric strip */
.metrics { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.metric { border: 1px solid var(--ot-border); border-radius: var(--ot-radius-md); padding: 14px 18px; background: var(--ot-surface); }
.metric .mv { font-family: var(--ot-font-display); font-weight: 800; font-size: 26px; color: #fff; }
.metric .ml { font-size: 13px; color: var(--ot-fg-subtle); margin-top: 2px; }
.metric .mv.grad { background: var(--ot-gradient-brand); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }