/**
 * Slide Type : Cover
 * Slide 0 - Page de garde élégante
 */

.slide-cover-container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.slide-cover-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    var(--perennity-primary) 0%, 
    var(--perennity-primary-dark) 50%,
    var(--perennity-primary) 100%);
  opacity: 0.03;
  z-index: 0;
}

.slide-cover-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: var(--perennity-space-3xl);
  animation: fadeInUp 0.8s var(--perennity-transition-normal);
}

.slide-cover-title {
  font-family: var(--perennity-font-elegant);
  font-size: var(--perennity-text-6xl);
  font-weight: var(--perennity-weight-semibold);
  color: var(--perennity-text-primary);
  line-height: var(--perennity-line-tight);
  margin-bottom: var(--perennity-space-xl);
  letter-spacing: -0.03em;
  position: relative;
  opacity: 0.96;
}

.slide-cover-title::after {
  content: '';
  position: absolute;
  bottom: -var(--perennity-space-lg);
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--perennity-accent-light), transparent);
  opacity: 0.5;
}

.slide-cover-subtitle {
  font-family: var(--perennity-font-elegant);
  font-size: var(--perennity-text-3xl);
  font-weight: var(--perennity-weight-regular);
  color: var(--perennity-text-secondary);
  font-style: italic;
  letter-spacing: 0.02em;
  margin-bottom: var(--perennity-space-2xl);
  margin-top: var(--perennity-space-xl);
  line-height: var(--perennity-line-relaxed);
  opacity: 0.85;
}

.slide-cover-tagline {
  font-family: var(--perennity-font-elegant);
  font-size: var(--perennity-text-xl);
  font-weight: var(--perennity-weight-regular);
  color: var(--perennity-accent);
  font-style: italic;
  letter-spacing: 0.03em;
  margin-bottom: var(--perennity-space-xl);
  line-height: var(--perennity-line-relaxed);
  position: relative;
  padding: var(--perennity-space-xl) 0;
  opacity: 0.9;
}

.slide-cover-tagline::before,
.slide-cover-tagline::after {
  content: '"';
  font-size: var(--perennity-text-3xl);
  color: var(--perennity-accent-light);
  opacity: 0.25;
  font-family: var(--perennity-font-elegant);
  font-weight: var(--perennity-weight-light);
}

.slide-cover-date {
  font-family: var(--perennity-font-body);
  font-size: var(--perennity-text-xs);
  color: var(--perennity-text-muted);
  font-weight: var(--perennity-weight-regular);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: var(--perennity-space-2xl);
  padding-top: var(--perennity-space-lg);
  border-top: 1px solid var(--perennity-border-subtle);
  display: inline-block;
  opacity: 0.7;
}

/* Animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Dark Mode */
[data-theme="dark"] .slide-cover-container::before,
.dark-mode .slide-cover-container::before {
  opacity: 0.05;
}

[data-theme="dark"] .slide-cover-tagline,
.dark-mode .slide-cover-tagline {
  color: var(--perennity-accent-light);
}

/* Responsive */
@media (max-width: 768px) {
  .slide-cover-title {
    font-size: var(--perennity-text-4xl);
  }
  
  .slide-cover-subtitle {
    font-size: var(--perennity-text-2xl);
  }
  
  .slide-cover-tagline {
    font-size: var(--perennity-text-lg);
  }
  
  .slide-cover-content {
    padding: var(--perennity-space-xl);
  }
}