/* ═══════════════════════════════════════════════════
   SHOWCASE — "So sieht eine Sitzung aus"
   Tab-Switcher (Desktop) + Stacked Cards (Mobile)
   ═══════════════════════════════════════════════════ */

.showcase { background: var(--bg-primary); overflow: hidden }

/* ─── Header ─── */
.showcase__header { margin-bottom: var(--space-lg) }
.showcase__header h2 {
  font-family: var(--font-display); font-size: var(--fs-h2);
  color: var(--text-primary); letter-spacing: 0.02em;
  margin-bottom: 0.3rem;
}
.showcase__subline {
  font-size: var(--fs-body); color: var(--text-muted);
  letter-spacing: 0.01em;
}

/* ─── Grid (Desktop: Tabs links, Preview rechts) ─── */
.showcase__grid {
  display: none; /* Mobile: versteckt */
  grid-template-columns: 0.42fr 0.58fr;
  gap: var(--space-xl); align-items: center;
}
@media(min-width: 768px) {
  .showcase__grid { display: grid }
}

/* ─── Tabs ─── */
.showcase__tabs { display: flex; flex-direction: column; gap: 0 }
.showcase__tab {
  position: relative; padding: 1.3rem 1.5rem; cursor: pointer;
  border-left: 2px solid rgba(255,255,255,0.06);
  transition: border-color 300ms ease, background 300ms ease;
}
.showcase__tab::before {
  content: ''; position: absolute; left: -2px; top: 0; width: 2px; height: 100%;
  background: linear-gradient(180deg, var(--c-blue), var(--c-green));
  opacity: 0; transition: opacity 300ms ease;
}
.showcase__tab.active::before { opacity: 1 }
.showcase__tab.active {
  border-left-color: transparent;
  background: rgba(255,255,255,0.025); border-radius: 0 8px 8px 0;
}
.showcase__tab-title {
  font-family: var(--font-display); font-size: clamp(1.05rem, 1.3vw, 1.25rem);
  color: var(--text-muted); transition: color 300ms ease; margin-bottom: 0.4rem;
}
.showcase__tab.active .showcase__tab-title { color: var(--text-primary) }
.showcase__tab-desc {
  font-size: var(--fs-small); color: var(--text-muted);
  line-height: 1.65; transition: color 300ms ease;
}
.showcase__tab.active .showcase__tab-desc { color: var(--text-secondary) }

@media(hover: hover) {
  .showcase__tab:not(.active):hover {
    border-left-color: rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.015);
  }
  .showcase__tab:not(.active):hover .showcase__tab-title { color: var(--text-secondary) }
  .showcase__tab:not(.active):hover .showcase__tab-desc { color: rgba(255,255,255,0.55) }
}

/* ─── Preview-Frame ─── */
.showcase__preview {
  position: relative; border-radius: 14px; overflow: hidden;
  background: var(--bg-card); border: 1px solid var(--bg-card-border);
  aspect-ratio: 3/2;
  box-shadow: 0 8px 40px rgba(0,0,0,0.3), 0 0 0 1px rgba(255,255,255,0.04);
}
.showcase__img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center top;
  opacity: 0; transform: scale(1.03);
  transition: opacity 400ms ease, transform 500ms ease;
  will-change: opacity, transform;
}
.showcase__img.active { opacity: 1; transform: scale(1) }
.showcase__img.leaving { opacity: 0; transform: scale(0.97); transition: opacity 300ms ease, transform 400ms ease }

/* Farbiger Glow hinter dem Preview-Frame */
.showcase__glow {
  position: absolute; inset: -30%; z-index: -1;
  border-radius: 50%; filter: blur(100px); pointer-events: none;
  transition: background 800ms ease;
}
.showcase__glow[data-color="blue"]  { background: radial-gradient(circle, rgba(91,155,213,0.14), transparent 65%) }
.showcase__glow[data-color="green"] { background: radial-gradient(circle, rgba(123,198,126,0.12), transparent 65%) }
.showcase__glow[data-color="amber"] { background: radial-gradient(circle, rgba(232,184,77,0.12), transparent 65%) }
.showcase__glow[data-color="rose"]  { background: radial-gradient(circle, rgba(244,114,142,0.14), transparent 65%) }

/* ─── Mobile: Stacked Cards (kein Tab-Switcher) ─── */
.showcase__mobile { display: flex; flex-direction: column; gap: var(--space-md) }
@media(min-width: 768px) {
  .showcase__mobile { display: none }
}

.showcase__mobile-img {
  width: 100%; border-radius: 12px; overflow: hidden;
  border: 1px solid var(--bg-card-border);
  box-shadow: 0 6px 24px rgba(0,0,0,0.25);
  margin-bottom: 0.8rem;
}
.showcase__mobile-img img { width: 100%; height: auto; display: block }
.showcase__mobile-title {
  font-family: var(--font-display); font-size: 1.1rem;
  color: var(--text-primary); margin-bottom: 0.3rem;
}
.showcase__mobile-desc {
  font-size: var(--fs-small); color: var(--text-secondary); line-height: 1.65;
}

/* ─── Reduced Motion ─── */
@media(prefers-reduced-motion: reduce) {
  .showcase__img { transform: none !important }
}