/* C83 Group — supplemental CSS for behaviours the React app handled with
   conditional classes / state. The bulk of the design lives in main.css
   (compiled Tailwind). This file only covers the sticky-header state swap,
   logo crossfade, mobile drawer animation and filter active states.
   It relies on the CSS custom properties defined in main.css (:root). */

/* ---------------- Sticky header ---------------- */
.c83-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  transition: all 0.3s ease;
  background: transparent;
}
.c83-header.is-scrolled {
  background: color-mix(in oklab, var(--background) 95%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card, 0 4px 18px -6px rgb(0 0 0 / 0.08));
  border-bottom: 1px solid var(--border);
}

/* Top utility bar collapses on scroll */
.c83-utilitybar {
  border-bottom: 1px solid rgb(255 255 255 / 0.1);
  height: 2.25rem;
  opacity: 1;
  overflow: hidden;
  transition: all 0.3s ease;
}
.is-scrolled .c83-utilitybar {
  height: 0;
  opacity: 0;
}

/* Logo crossfade */
.c83-logo-white { opacity: 1; }
.c83-logo-color { opacity: 0; }
.is-scrolled .c83-logo-white { opacity: 0; }
.is-scrolled .c83-logo-color { opacity: 1; }

/* Nav link colours: white over hero, foreground when scrolled */
.c83-navlink { color: #fff; transition: color 0.2s ease; }
.c83-navlink:hover { color: var(--accent); }
.is-scrolled .c83-navlink { color: var(--foreground); }
.is-scrolled .c83-navlink:hover { color: var(--primary); }

.c83-burger { color: #fff; }
.c83-burger:hover { background: rgb(255 255 255 / 0.1); }
.is-scrolled .c83-burger { color: var(--foreground); }
.is-scrolled .c83-burger:hover { background: var(--muted); }

/* Burger icon swap */
.c83-burger .icon-close { display: none; }
.c83-burger.is-open .icon-menu { display: none; }
.c83-burger.is-open .icon-close { display: block; }

/* ---------------- Desktop dropdown (pure CSS hover) ---------------- */
.c83-navitem > .c83-dropdown {
  visibility: hidden;
  opacity: 0;
  transition: all 0.2s ease;
}
.c83-navitem:hover > .c83-dropdown {
  visibility: visible;
  opacity: 1;
}

/* ---------------- Mobile drawer ---------------- */
.c83-drawer[hidden] { display: none; }

/* ---------------- Filter buttons ---------------- */
[data-filter] {
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 700;
  transition: all 0.2s ease;
  background: var(--muted);
  color: var(--muted-foreground);
  cursor: pointer;
}
[data-filter]:hover { background: color-mix(in oklab, var(--muted) 70%, transparent); }
[data-filter].is-active {
  background: var(--primary);
  color: var(--primary-foreground);
  box-shadow: var(--shadow-elegant);
}

/* ---------------- Pagination ---------------- */
.c83-pagination .page-numbers {
  display: inline-grid;
  place-items: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--foreground);
  transition: all 0.2s ease;
}
.c83-pagination .page-numbers:hover { border-color: var(--primary); color: var(--primary); }
.c83-pagination .page-numbers.current {
  background: var(--primary);
  color: var(--primary-foreground);
  border-color: var(--primary);
}

/* Reveal default hidden state handled by JS adding .opacity-0 then animating.
   Provide a no-JS fallback so content is always visible. */
.no-js [data-reveal] { opacity: 1 !important; }