:root {
  --bg-deep: #050505;
  --bg-card: #0f0f0f;
  --accent-gold: #c5a059;
  --accent-gold-muted: #8e7340;
  --text-main: #e0e0e0;
  --text-dim: #a0a0a0;
  --border-color: #222;
  --font-display: 'Playfair Display', serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --slide-width: 100vw;
  --slide-height: 100vh;
  --transition-speed: 0.8s;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-body);
  overflow: hidden;
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* Slide Container */
.presentation {
  display: flex;
  width: 800vw; /* 8 slides */
  height: 100vh;
  transition: transform var(--transition-speed) cubic-bezier(0.77, 0, 0.175, 1);
}

.slide {
  width: 100vw;
  height: 100vh;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  padding: 4rem;
  overflow: hidden;
}

/* Background Effects */
.slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at center, rgba(197, 160, 89, 0.05) 0%, transparent 70%);
  z-index: -1;
}

.grain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.03;
  pointer-events: none;
  z-index: 100;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Navigation */
.nav-controls {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  gap: 1rem;
  z-index: 1000;
}

.nav-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--accent-gold);
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-family: var(--font-display);
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(5px);
}

.nav-btn:hover {
  background: var(--accent-gold);
  color: var(--bg-deep);
}

.slide-counter {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  font-family: var(--font-display);
  color: var(--accent-gold-muted);
  font-size: 1.2rem;
  z-index: 1000;
}

/* Content Styling */
.content-wrapper {
  max-width: 1000px;
  width: 100%;
  opacity: 0;
  transform: translateY(30px);
  animation: slideIn 1s forwards 0.5s;
}

@keyframes slideIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.title-large {
  font-size: clamp(3rem, 8vw, 6rem);
  color: var(--accent-gold);
  margin-bottom: 1rem;
  line-height: 1;
}

.subtitle {
  font-size: 1.5rem;
  color: var(--text-dim);
  margin-bottom: 2rem;
  max-width: 600px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.card {
  background: var(--bg-card);
  padding: 2rem;
  border-left: 3px solid var(--accent-gold);
  transition: transform 0.3s ease;
}

.card:hover {
  transform: scale(1.02);
}

.card h3 {
  color: var(--accent-gold);
  margin-bottom: 1rem;
}

.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 1px solid var(--border-color);
}

.timeline-item {
  margin-bottom: 2rem;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.35rem;
  top: 0.5rem;
  width: 10px;
  height: 10px;
  background: var(--accent-gold);
  border-radius: 50%;
}

.placeholder-image {
  width: 100%;
  height: 300px;
  background: #1a1a1a;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #444;
  border: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

/* Animations for specific slides */
#slide1 .content-wrapper { animation-delay: 0.2s; }
#slide2 .content-wrapper { animation-delay: 0.2s; }

/* Special Hero Slide */
.hero-text {
  text-align: center;
}

.quote {
  font-style: italic;
  font-size: 1.8rem;
  color: var(--text-main);
  border-left: none;
  text-align: center;
  margin: 2rem 0;
}

/* Responsive */
@media (max-width: 768px) {
  .slide { padding: 2rem; }
  .grid { grid-template-columns: 1fr; }
}