/*
 * THEATRE MODE BRIEFCASE CAROUSEL
 * Dark stage. Focused content. Eyes go where the light is.
 *
 * Color system: dark stage with brand-tinted surfaces.
 * Pages set --brand, --brand-hover, and --brand-soft.
 *
 * Usage:
 *   :root {
 *     --brand: #632CA6;
 *     --brand-hover: #7c3aed;
 *     --brand-soft: rgba(99, 44, 166, 0.08);
 *   }
 */

/* === THEATRE: Dark stage === */
.blog-post-content.carousel-mode {
  --briefcase-frame-max: 920px;
  max-width: none;
  padding: 0;
  padding-bottom: 70px;
  background: #050B14;
}

/* === CAROUSEL TRACK === */
.briefcase-carousel {
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  overscroll-behavior-x: contain;
  background: #050B14;
  align-items: flex-start;
  transition: height 0.35s ease;
}
.briefcase-carousel::-webkit-scrollbar { display: none; }

/* === SLIDES === */
.mega-slide {
  flex: 0 0 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  min-width: 0;
  box-sizing: border-box;
  padding: var(--space-lg) max(1.25rem, calc((100% - var(--briefcase-frame-max)) / 2)) var(--space-lg);
  opacity: 0.08;
  filter: blur(3px);
  transform: scale(0.65);
  transform-origin: center top;
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              filter 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.mega-slide.active {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}

@media (max-width: 768px) {
  .mega-slide { padding: var(--space-md) var(--space-sm) 0; }
}

/* === SLIDE HEADER: brand-tinted glass === */
.slide-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: var(--brand-soft, rgba(255, 255, 255, 0.04));
  border-left: 5px solid var(--brand);
  border-bottom: 1px solid var(--brand-soft, rgba(255, 255, 255, 0.06));
}
.slide-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--brand);
  line-height: 1;
  flex-shrink: 0;
  letter-spacing: -0.04em;
}
.slide-label {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #E2E8F0; /* blue-tinted off-white */
  letter-spacing: -0.02em;
}
.slide-sublabel {
  font-size: 0.75rem;
  color: #64748B; /* slate-blue muted */
  margin-top: 2px;
}

/* === SECTION BLOCKS: warm off-white on dark stage === */
.briefcase-carousel .section-block {
  background: #F8FAFC; /* blue-tinted off-white */
  border-radius: 2px;
  margin-bottom: var(--space-md);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.3),
              0 0 0 1px var(--brand-soft, rgba(255, 255, 255, 0.04));
}

.briefcase-carousel .analogy-box {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.3);
  margin-bottom: var(--space-md);
}

/* Tighter h2 */
.briefcase-carousel .section-block h2 {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom-width: 2px;
}

/* === SCROLL-DRIVEN FOCUS === */
.briefcase-carousel .section-block,
.briefcase-carousel .analogy-box {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.briefcase-carousel .section-block.in-view,
.briefcase-carousel .analogy-box.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* === STICKY PROGRESS BAR: brand-tinted === */
.carousel-progress {
  position: sticky;
  top: 60px;
  z-index: 50;
  background: #050B14;
  border-bottom: 1px solid var(--brand-soft, rgba(255, 255, 255, 0.06));
  padding: var(--space-sm) 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}
.progress-inner {
  max-width: var(--briefcase-frame-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  grid-template-areas:
    "text dots"
    "track dots";
  align-items: center;
  gap: 6px var(--space-md);
}
.progress-track {
  grid-area: track;
  height: 3px;
  background: var(--brand-soft, rgba(255, 255, 255, 0.08));
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--brand);
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  width: 20%;
}
.progress-text {
  grid-area: text;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: #94A3B8;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.progress-dots {
  grid-area: dots;
  min-width: 0;
  display: flex;
  justify-self: end;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  overflow-x: auto;
  padding: 0.125rem 0 0.25rem;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.progress-dots::-webkit-scrollbar { display: none; }
.progress-dot {
  width: auto;
  min-height: 34px;
  border-radius: 9999px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 0.35rem 0.7rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  color: #64748B;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  flex: 0 0 auto;
}
.progress-dot::after {
  content: attr(aria-label);
}
.progress-dot.active {
  background: var(--brand-soft, rgba(255, 255, 255, 0.08));
  border-color: var(--brand);
  color: #E2E8F0;
}
.progress-dot:hover {
  border-color: var(--brand);
  color: #E2E8F0;
  background: rgba(255, 255, 255, 0.03);
}

/* === FIXED BOTTOM NAVIGATION === */
.slide-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: #050B14;
  border-top: 1px solid var(--brand-soft, rgba(255, 255, 255, 0.06));
  padding: 0;
  display: flex;
  align-items: stretch;
}
.slide-nav-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border: none;
  background: transparent;
  color: #64748B;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8125rem;
  cursor: pointer;
  transition: all 0.15s ease;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.slide-nav-btn:hover {
  background: var(--brand-soft, rgba(255, 255, 255, 0.04));
  color: #e8e4ef;
}
.slide-nav-btn.primary {
  flex: 2;
  background: var(--brand);
  color: #fff;
  font-size: 1rem;
  letter-spacing: 0.08em;
  padding: var(--space-md) var(--space-xl);
}
.slide-nav-btn.primary:hover {
  background: var(--brand-hover);
}
.slide-nav-btn:disabled {
  opacity: 0.15;
  cursor: not-allowed;
}
.slide-nav-btn:disabled:hover {
  background: transparent;
}
.slide-nav-center {
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  border-inline: 1px solid rgba(255, 255, 255, 0.08);
}
.slide-nav-center a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.45rem 0.85rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.75rem;
  font-weight: 700;
  color: #CBD5E1;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.slide-nav-center a:hover {
  color: #F8FAFC;
  border-color: var(--brand);
  background: var(--brand-soft, rgba(255, 255, 255, 0.04));
}

/* === TABLE OVERFLOW === */
.briefcase-carousel .section-block table {
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  font-size: 0.8125rem;
}
.briefcase-carousel .section-block thead,
.briefcase-carousel .section-block tbody {
  display: table;
  width: 100%;
}
.briefcase-carousel .section-block thead th,
.briefcase-carousel .section-block tbody td {
  padding: var(--space-sm) var(--space-md);
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  .briefcase-carousel { scroll-behavior: auto !important; }
  .progress-fill { transition: none !important; }
  .briefcase-carousel { transition: none !important; }
  .mega-slide { transition: none !important; }
  .briefcase-carousel .section-block,
  .briefcase-carousel .analogy-box {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

@media (max-width: 900px) {
  .progress-inner {
    grid-template-columns: 1fr;
    grid-template-areas:
      "text"
      "track"
      "dots";
  }

  .progress-dots {
    justify-self: stretch;
  }
}

@media (max-width: 768px) {
  .progress-inner {
    padding: 0 var(--space-sm);
  }

  .progress-text {
    font-size: 0.6875rem;
  }

  .progress-dot {
    min-height: 30px;
    padding: 0.3rem 0.55rem;
    font-size: 0.5625rem;
  }

  .slide-nav {
    gap: 0;
  }

  .slide-nav-center {
    padding: 0 0.35rem;
  }

  .slide-nav-center a {
    padding: 0.38rem 0.65rem;
    font-size: 0.6875rem;
  }
}