/**
 * Accessible Tabs Component
 * Progressive enhancement with JavaScript
 * Segmented/Pills UI
 */

/* =======================================================================
   Tab List (support both legacy and new selectors)
   ======================================================================= */
.gpcc-skin .gpcc-tabs__tablist,
.gpcc-skin .gpcc-tabs__nav {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
  padding: 4px;
  border-radius: 0;
}

/* =======================================================================
   Tab Buttons (support both selectors)
   ======================================================================= */
.gpcc-skin .gpcc-tabs__tab-button,
.gpcc-skin .gpcc-tabs__tab {
  appearance: none;
  border: 0;
  background: var(--surface-1);
  color: var(--text);
  padding: 10px 16px; /* 40-44px height target */
  border-radius: 0;
  font: inherit;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  line-height: 1.2;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.gpcc-skin .gpcc-tabs__tab-button:hover,
.gpcc-skin .gpcc-tabs__tab:hover {
  background: var(--surface-3);
}

.gpcc-skin .gpcc-tabs__tab-button:focus-visible,
.gpcc-skin .gpcc-tabs__tab:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* Active state: underline/border-bottom highlight */
.gpcc-skin .gpcc-tabs__tab-button[aria-selected="true"],
.gpcc-skin .gpcc-tabs__tab[aria-selected="true"] {
  background: var(--surface-2);
  color: var(--primary);
  position: relative;
}

.gpcc-skin .gpcc-tabs__tab-button[aria-selected="true"]::after,
.gpcc-skin .gpcc-tabs__tab[aria-selected="true"]::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -5px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

/* =======================================================================
   Panels container and panels (support both selectors)
   ======================================================================= */
.gpcc-skin .gpcc-tabs__content { position: relative; }

.gpcc-skin .gpcc-tabs__tabpanel,
.gpcc-skin .gpcc-tabs__panel {
  padding: var(--gap);
  line-height: var(--leading-relaxed);
  color: var(--text);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 0;
}

/* Hide panels when aria-hidden=true (JS-enhanced) */
.gpcc-skin .gpcc-tabs__tabpanel[aria-hidden="true"],
.gpcc-skin .gpcc-tabs__panel[aria-hidden="true"] { display: none; }

/* Typography inside panels */
.gpcc-skin .gpcc-tabs__tabpanel h1,
.gpcc-skin .gpcc-tabs__panel h1,
.gpcc-skin .gpcc-tabs__tabpanel h2,
.gpcc-skin .gpcc-tabs__panel h2,
.gpcc-skin .gpcc-tabs__tabpanel h3,
.gpcc-skin .gpcc-tabs__panel h3,
.gpcc-skin .gpcc-tabs__tabpanel h4,
.gpcc-skin .gpcc-tabs__panel h4,
.gpcc-skin .gpcc-tabs__tabpanel h5,
.gpcc-skin .gpcc-tabs__panel h5,
.gpcc-skin .gpcc-tabs__tabpanel h6,
.gpcc-skin .gpcc-tabs__panel h6 {
  color: var(--text);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  margin: var(--gap) 0 var(--gap-sm) 0;
}

/* Sizes map */
.gpcc-skin .gpcc-tabs__tabpanel h1, .gpcc-skin .gpcc-tabs__panel h1 { font-size: var(--text-2xl); }
.gpcc-skin .gpcc-tabs__tabpanel h2, .gpcc-skin .gpcc-tabs__panel h2 { font-size: var(--text-xl); }
.gpcc-skin .gpcc-tabs__tabpanel h3, .gpcc-skin .gpcc-tabs__panel h3 { font-size: var(--text-lg); }
.gpcc-skin .gpcc-tabs__tabpanel h4, .gpcc-skin .gpcc-tabs__panel h4 { font-size: var(--text-base); }
.gpcc-skin .gpcc-tabs__tabpanel h5, .gpcc-skin .gpcc-tabs__panel h5 { font-size: var(--text-sm); }
.gpcc-skin .gpcc-tabs__tabpanel h6, .gpcc-skin .gpcc-tabs__panel h6 { font-size: var(--text-xs); }

.gpcc-skin .gpcc-tabs__tabpanel p,
.gpcc-skin .gpcc-tabs__panel p { margin: 0 0 var(--gap-sm) 0; }

.gpcc-skin .gpcc-tabs__tabpanel p:last-child,
.gpcc-skin .gpcc-tabs__panel p:last-child { margin-bottom: 0; }

.gpcc-skin .gpcc-tabs__tabpanel ul,
.gpcc-skin .gpcc-tabs__panel ul,
.gpcc-skin .gpcc-tabs__tabpanel ol,
.gpcc-skin .gpcc-tabs__panel ol {
  margin: 0 0 var(--gap-sm) 0;
  padding-left: var(--gap);
}

.gpcc-skin .gpcc-tabs__tabpanel li,
.gpcc-skin .gpcc-tabs__panel li { margin-bottom: calc(var(--gap-xs) / 2); }

.gpcc-skin .gpcc-tabs__tabpanel a,
.gpcc-skin .gpcc-tabs__panel a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.gpcc-skin .gpcc-tabs__tabpanel a:hover,
.gpcc-skin .gpcc-tabs__panel a:hover { color: var(--primary-hover); text-decoration: underline; }

.gpcc-skin .gpcc-tabs__tabpanel a:focus-visible,
.gpcc-skin .gpcc-tabs__panel a:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* =======================================================================
   Responsive
   ======================================================================= */
@media (max-width: 768px) {
  .gpcc-skin .gpcc-tabs__tab-button,
  .gpcc-skin .gpcc-tabs__tab { padding: 8px 12px; font-size: var(--text-xs); }
  .gpcc-skin .gpcc-tabs__tabpanel,
  .gpcc-skin .gpcc-tabs__panel { padding: var(--gap-sm); }
}

/* =======================================================================
   No-JS Fallback: show all panels, hide tablist if needed via .no-js
   ======================================================================= */
.no-js .gpcc-skin .gpcc-tabs__tabpanel,
.no-js .gpcc-skin .gpcc-tabs__panel {
  display: block;
  border-top: 1px solid var(--border);
  margin-top: var(--gap-sm);
}

.no-js .gpcc-skin .gpcc-tabs__tablist,
.no-js .gpcc-skin .gpcc-tabs__nav { display: none; }