/* ============================================
   RIETI SERIES LANDING PAGE
   Ancient Roman & Medieval Theme
   Brown/Sepia/Stone Color Palette
   ============================================ */

/* ===== VARIABLES ===== */
:root {
  --rieti-primary: #8B4513;        /* Saddle Brown */
  --rieti-light: #D4A574;          /* Tan/Wheat */
  --rieti-dark: #2C1810;           /* Deep Brown */
  --rieti-sepia: #704214;          /* Sepia Brown */
  --rieti-stone: #8D7B68;          /* Stone Gray */
  --rieti-stone-light: #A69F96;    /* Light Stone */
  --rieti-bg: #0f172a;             /* Dark Background */
  --rieti-card-bg: #1e293b;        /* Card Background */
  --rieti-text: #f1f5f9;           /* Light Text */
  --rieti-text-dim: #94a3b8;       /* Dimmed Text */
  --rieti-border: rgba(141, 123, 104, 0.2);
}

/* ===== BASE LAYOUT ===== */
.rieti-series-page {
  min-height: 100vh;
  background: var(--rieti-bg);
  color: var(--rieti-text);
  position: relative;
  overflow-x: hidden;
}

/* ===== AMBIENT BACKGROUND ===== */
.rieti-ambient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.rieti-ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.12;
  animation: ancientFloat 25s ease-in-out infinite;
}

.rieti-glow-1 {
  width: 700px;
  height: 700px;
  background: var(--rieti-primary);
  top: -150px;
  left: -100px;
  animation-delay: 0s;
}

.rieti-glow-2 {
  width: 600px;
  height: 600px;
  background: var(--rieti-sepia);
  bottom: -100px;
  right: -150px;
  animation-delay: 12s;
}

.rieti-ambient-stone {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 30%, rgba(139, 69, 19, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(112, 66, 20, 0.03) 0%, transparent 50%);
}

@keyframes ancientFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -40px) scale(1.15); }
  66% { transform: translate(-30px, 30px) scale(0.95); }
}

/* ===== HERO SECTION ===== */
.rieti-hero {
  position: relative;
  z-index: 1;
  padding: 8rem 2rem 6rem;
  text-align: center;
  background: linear-gradient(180deg, rgba(44, 24, 16, 0.2) 0%, transparent 100%);
}

.rieti-hero-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.03;
  background-image: repeating-linear-gradient(
    45deg,
    var(--rieti-primary) 0px,
    var(--rieti-primary) 2px,
    transparent 2px,
    transparent 12px
  );
}

.rieti-hero-content {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.rieti-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  background: rgba(139, 69, 19, 0.15);
  border: 1px solid rgba(139, 69, 19, 0.3);
  border-radius: 24px;
  margin-bottom: 2rem;
  color: var(--rieti-light);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.rieti-hero-badge i {
  font-size: 1.5rem;
  color: var(--rieti-primary);
}

.rieti-hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: 2rem;
  background: linear-gradient(135deg, var(--rieti-light) 0%, var(--rieti-primary) 50%, var(--rieti-sepia) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.rieti-hero-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin: 2.5rem 0;
  color: var(--rieti-primary);
}

.rieti-divider-line {
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--rieti-primary) 50%, transparent 100%);
}

.rieti-hero-divider i {
  font-size: 2rem;
  animation: ancientPulse 3s ease-in-out infinite;
}

@keyframes ancientPulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.1); opacity: 1; }
}

.rieti-hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--rieti-text-dim);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.rieti-location {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: rgba(141, 123, 104, 0.1);
  border: 1px solid var(--rieti-border);
  border-radius: 20px;
  color: var(--rieti-stone-light);
  font-size: 0.95rem;
}

.rieti-location i {
  color: var(--rieti-primary);
}

/* ===== TIMELINE SECTION ===== */
.rieti-timeline-section {
  position: relative;
  z-index: 1;
  padding: 3rem 2rem;
  margin-bottom: 2rem;
}

.rieti-timeline-container {
  max-width: 800px;
  margin: 0 auto;
}

.rieti-timeline-track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.rieti-timeline-node {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}

.rieti-timeline-marker {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--rieti-card-bg);
  border: 3px solid var(--episode-color, var(--rieti-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--rieti-light);
  box-shadow: 0 0 30px var(--episode-color, var(--rieti-primary));
  position: relative;
  z-index: 2;
  transition: all 0.4s ease;
}

.rieti-timeline-marker:hover {
  transform: scale(1.15);
  box-shadow: 0 0 50px var(--episode-color, var(--rieti-primary));
}

.rieti-timeline-connector {
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, var(--rieti-primary) 0%, var(--rieti-sepia) 100%);
  position: relative;
  margin: 0 -2px;
}

/* ===== MAIN CONTENT ===== */
.rieti-main {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

/* ===== EPISODES GRID ===== */
.rieti-episodes {
  margin-bottom: 6rem;
}

.rieti-episodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 2.5rem;
}

/* ===== EPISODE CARD ===== */
.rieti-episode-card {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: calc(var(--episode-index) * 0.15s);
}

.rieti-episode-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.rieti-episode-link {
  display: block;
  position: relative;
  background: var(--rieti-card-bg);
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--rieti-border);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  color: inherit;
}

.rieti-episode-link:hover {
  transform: translateY(-12px);
  border-color: var(--episode-color);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5), 0 0 50px var(--episode-color);
}

/* ===== EPISODE IMAGE ===== */
.rieti-episode-image {
  position: relative;
  width: 100%;
  height: 320px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--rieti-primary) 0%, var(--rieti-sepia) 100%);
}

.rieti-episode-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: sepia(20%) contrast(1.05) brightness(0.95);
  transition: filter 0.6s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.rieti-episode-link:hover .rieti-episode-image img {
  transform: scale(1.08);
  filter: sepia(10%) contrast(1.1) brightness(1);
}

.rieti-episode-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, transparent 0%, rgba(44, 24, 16, 0.6) 60%, rgba(44, 24, 16, 0.95) 100%);
  transition: opacity 0.4s ease;
}

.rieti-episode-link:hover .rieti-episode-overlay {
  opacity: 0.8;
}

/* ===== PLAY ICON ===== */
.rieti-episode-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(139, 69, 19, 0.9);
  border: 3px solid var(--rieti-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--rieti-light);
  font-size: 2.5rem;
  transition: all 0.4s ease;
  z-index: 3;
}

.rieti-episode-link:hover .rieti-episode-play {
  transform: translate(-50%, -50%) scale(1.15);
  background: var(--episode-color);
  border-color: white;
  color: white;
  box-shadow: 0 0 40px var(--episode-color);
}

/* ===== EPISODE NUMBER BADGE ===== */
.rieti-episode-number {
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  padding: 0.5rem 1rem;
  background: rgba(139, 69, 19, 0.95);
  border: 1px solid var(--rieti-light);
  border-radius: 16px;
  color: var(--rieti-light);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 3;
}

/* ===== NEW BADGE ===== */
.rieti-badge-new {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  border-radius: 16px;
  color: white;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 3;
  animation: newBadgePulse 2s ease-in-out infinite;
}

@keyframes newBadgePulse {
  0%, 100% { box-shadow: 0 0 10px rgba(245, 158, 11, 0.5); }
  50% { box-shadow: 0 0 20px rgba(245, 158, 11, 0.8); }
}

/* ===== EPISODE CONTENT ===== */
.rieti-episode-content {
  padding: 2rem;
}

.rieti-episode-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--rieti-light);
  line-height: 1.3;
}

.rieti-episode-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--rieti-text-dim);
  margin-bottom: 1.5rem;
}

/* ===== TAGS ===== */
.rieti-episode-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.rieti-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  background: rgba(139, 69, 19, 0.15);
  border: 1px solid rgba(139, 69, 19, 0.3);
  border-radius: 12px;
  color: var(--rieti-stone-light);
  font-size: 0.875rem;
  font-weight: 500;
}

.rieti-tag i {
  color: var(--rieti-primary);
  font-size: 1rem;
}

/* ===== META INFO ===== */
.rieti-episode-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rieti-border);
}

.rieti-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--rieti-text-dim);
  font-size: 0.9375rem;
}

.rieti-meta-item i {
  color: var(--rieti-primary);
}

/* ===== CTA BUTTON ===== */
.rieti-episode-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, var(--rieti-primary) 0%, var(--rieti-sepia) 100%);
  border-radius: 12px;
  color: white;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.rieti-episode-link:hover .rieti-episode-cta {
  background: linear-gradient(135deg, #a0522d 0%, #8b5a3c 100%);
  transform: translateX(4px);
}

.rieti-episode-cta i {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
}

.rieti-episode-link:hover .rieti-episode-cta i {
  transform: translateX(4px);
}

/* ===== ACCENT BORDER ===== */
.rieti-episode-accent {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--rieti-primary) 0%, var(--rieti-light) 50%, transparent 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

.rieti-episode-link:hover .rieti-episode-accent {
  transform: scaleX(1);
}

/* ===== ABOUT SECTION ===== */
.rieti-about {
  background: rgba(139, 69, 19, 0.05);
  border: 1px solid var(--rieti-border);
  border-radius: 24px;
  padding: 4rem 3rem;
  margin-bottom: 4rem;
  text-align: center;
}

.rieti-about-icon {
  font-size: 3rem;
  color: var(--rieti-primary);
  margin-bottom: 1.5rem;
}

.rieti-about-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--rieti-light);
  margin-bottom: 1.5rem;
}

.rieti-about-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--rieti-text-dim);
  max-width: 800px;
  margin: 0 auto;
}

/* ===== FOOTER NAV ===== */
.rieti-footer-nav {
  text-align: center;
  padding: 2rem 0;
}

.rieti-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  background: rgba(141, 123, 104, 0.1);
  border: 1px solid var(--rieti-border);
  border-radius: 16px;
  color: var(--rieti-light);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
}

.rieti-back-link:hover {
  background: rgba(139, 69, 19, 0.2);
  border-color: var(--rieti-primary);
  transform: translateX(-4px);
}

.rieti-back-link i {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
}

.rieti-back-link:hover i {
  transform: translateX(-4px);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .rieti-hero {
    padding: 5rem 1.5rem 4rem;
  }

  .rieti-hero-title {
    font-size: 2rem;
  }

  .rieti-timeline-marker {
    width: 48px;
    height: 48px;
    font-size: 1.125rem;
  }

  .rieti-timeline-connector {
    width: 60px;
  }

  .rieti-episodes-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .rieti-episode-image {
    height: 240px;
  }

  .rieti-episode-content {
    padding: 1.5rem;
  }

  .rieti-episode-title {
    font-size: 1.5rem;
  }

  .rieti-about {
    padding: 2.5rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .rieti-hero-badge {
    font-size: 0.8125rem;
    padding: 0.625rem 1.25rem;
  }

  .rieti-divider-line {
    width: 50px;
  }

  .rieti-episode-play {
    width: 64px;
    height: 64px;
    font-size: 2rem;
  }

  .rieti-timeline-section {
    padding: 2rem 1rem;
  }
}