/* ============================================================
   Páginas de demonstração (vitrine) — 3TAG.shop
   ============================================================ */

.demo-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(140%);
  background: rgba(5, 6, 15, 0.6);
  border-bottom: 1px solid var(--border);
}
.demo-header::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: var(--grad-primary);
  opacity: 0.5;
}
.demo-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}
.demo-back {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--text-dim);
  transition: color .25s var(--ease);
}
.demo-back:hover { color: var(--cyan); }
.demo-badge {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-glow);
  color: var(--cyan);
  white-space: nowrap;
}

.demo-hero {
  padding: 150px 0 90px;
}
.demo-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.demo-hero-copy .eyebrow { margin-bottom: 18px; }
.demo-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin: 0 0 22px;
}
.demo-hero-copy p { color: var(--text-dim); font-size: 1.05rem; max-width: 480px; margin: 0 0 30px; }
.demo-hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }

.demo-frame {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border-glow);
  background: var(--surface-solid);
  box-shadow: 0 40px 90px -24px rgba(79,123,255,0.4), 0 0 70px -18px rgba(168,85,247,0.4);
}
.demo-frame img { width: 100%; display: block; }
.demo-frame-note {
  position: absolute;
  top: 14px; left: 14px;
  font-family: var(--font-display);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(5,6,15,0.75);
  border: 1px solid var(--border-glow);
  backdrop-filter: blur(6px);
}

.demo-notice {
  margin-top: 26px;
  padding: 16px 20px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  font-size: 0.86rem;
  color: var(--text-dim);
  max-width: 480px;
}
.demo-notice strong { color: var(--text); }

.demo-cross {
  padding: 70px 0 100px;
  border-top: 1px solid var(--border);
}
.demo-cross-head { text-align: center; margin-bottom: 40px; }
.demo-cross-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.demo-cross-card {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform .35s var(--ease), border-color .35s var(--ease);
  display: block;
}
.demo-cross-card:hover { transform: translateY(-6px); border-color: var(--border-glow); }
.demo-cross-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; }
.demo-cross-card span {
  display: block;
  padding: 14px 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
}

@media (max-width: 960px) {
  .demo-hero { padding: 120px 0 60px; }
  .demo-hero-inner { grid-template-columns: 1fr; text-align: center; }
  .demo-hero-copy p { margin-inline: auto; }
  .demo-hero-cta { justify-content: center; }
  .demo-notice { margin-inline: auto; }
  .demo-cross-grid { grid-template-columns: 1fr; }
}