/* ==========================================================================
   WHO CAN JOIN SECTION STYLES — GSAP SCROLL STACKING CARDS DECK
   Ultra-modern Obsidian Glass, Hardware-Accelerated 3D Depth, Responsive
   ========================================================================== */

.who-join-section {
  background-color: var(--color-bg-alt);
  position: relative;
  overflow: visible;
  padding-top: clamp(4rem, 8vw, 7rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

/* --------------------------------------------------------------------------
   Stack Container & Layout Wrapper
   -------------------------------------------------------------------------- */
.who-stack-container {
  position: relative;
  width: 100%;
  margin-top: 1rem;
  margin-bottom: 4rem;
}

/* --------------------------------------------------------------------------
   Interactive Navigation Pill Bar
   -------------------------------------------------------------------------- */
.who-stack-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 0 auto 2.5rem auto;
  padding: 0.375rem 0.5rem;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full, 9999px);
  width: fit-content;
  max-width: 100%;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  position: relative;
  z-index: 20;
}

.who-nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.15rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-full, 9999px);
  color: var(--color-text-muted, #94A3B8);
  font-family: var(--font-sans, system-ui);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal, 0.25s ease);
  outline: none;
  white-space: nowrap;
}

.who-nav-pill:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.04);
}

.who-nav-pill .pill-num {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  opacity: 0.7;
  letter-spacing: 0.04em;
}

.who-nav-pill.is-active {
  background: rgba(255, 122, 0, 0.18);
  border-color: rgba(255, 122, 0, 0.45);
  color: #FFFFFF;
  box-shadow: 0 0 20px rgba(255, 122, 0, 0.25);
}

.who-nav-pill.is-active .pill-num {
  color: #FF9433;
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Cards Deck Stage
   -------------------------------------------------------------------------- */
.who-stack-deck {
  position: relative;
  max-width: 900px;
  min-height: 480px;
  margin: 0 auto;
  width: 100%;
}

/* --------------------------------------------------------------------------
   Individual Stacking Card
   -------------------------------------------------------------------------- */
.who-stack-card {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  background: #0B1120;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-2xl, 24px);
  padding: clamp(2rem, 4vw, 2.75rem);
  box-shadow: 0 30px 80px -15px rgba(0, 0, 0, 0.95), 
              0 0 45px -5px var(--accent-glow, rgba(255, 122, 0, 0.3)),
              inset 0 1px 0 rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  overflow: hidden;
  will-change: transform, opacity;
  transform-origin: top center;
  transform: translate3d(0, 0, 0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.who-stack-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-color, #FF7A00) 15%, var(--accent-color, #FF7A00) 85%, transparent);
  opacity: 0.9;
  pointer-events: none;
}

.who-stack-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 30px 70px -10px rgba(0, 0, 0, 0.9), 
              0 0 50px -5px var(--accent-glow, rgba(255, 122, 0, 0.35)),
              inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Card Glow Ambience */
.who-card-glow {
  position: absolute;
  top: -80px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow, rgba(255, 122, 0, 0.3)) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.6;
  filter: blur(40px);
}

/* Card Watermark Number */
.who-card-watermark {
  position: absolute;
  top: 0.75rem;
  right: 2rem;
  font-family: var(--font-sans);
  font-size: clamp(5rem, 9vw, 8rem);
  font-weight: 900;
  line-height: 1;
  color: #FFFFFF;
  opacity: 0.04;
  pointer-events: none;
  user-select: none;
}

/* Card Inner Content Structure */
.who-card-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.who-header {
  margin-bottom: 0;
}

.who-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.who-badge {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-color, #38BDF8);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--accent-color, rgba(6, 182, 212, 0.35));
  display: inline-block;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full, 9999px);
}

.who-counter {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-dim, #64748B);
  letter-spacing: 0.08em;
}

.who-title {
  font-size: clamp(1.25rem, 2.2vw, 1.65rem);
  color: #FFFFFF;
  line-height: 1.3;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.015em;
}

.who-desc {
  font-size: clamp(0.92rem, 1.1vw, 1.02rem);
  color: var(--color-text-muted, #94A3B8);
  line-height: 1.65;
  margin: 0;
}

/* Recommended Tracks Pill List */
.who-recommended {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.rec-label {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent-color, #FF7A00);
}

.rec-tag {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  color: #E2E8F0;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm, 6px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-fast, 0.15s ease);
}

.who-stack-card:hover .rec-tag {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
}

/* Card Footer Action Strip */
.who-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 1.15rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  flex-wrap: wrap;
}

.who-fit-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-emerald, #10B981);
}

.who-fit-tag svg {
  color: var(--color-emerald, #10B981);
  flex-shrink: 0;
}

.who-match-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--accent-color, rgba(255, 122, 0, 0.4));
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-full, 9999px);
  text-decoration: none;
  transition: all var(--transition-normal, 0.25s ease);
}

.who-match-btn:hover {
  background: var(--accent-color, #FF7A00);
  color: #FFFFFF;
  box-shadow: 0 0 20px var(--accent-glow, rgba(255, 122, 0, 0.4));
  transform: translateX(3px);
}

.who-match-btn svg {
  transition: transform 0.2s ease;
}

.who-match-btn:hover svg {
  transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   Bottom Callout CTA Box (Preserved)
   -------------------------------------------------------------------------- */
.who-cta-box {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.96) 0%, rgba(30, 41, 59, 0.92) 100%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-left: 4px solid var(--color-brand, #FF7A00);
  color: #FFFFFF;
  border-radius: var(--radius-xl, 20px);
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.75), 0 0 30px rgba(255, 122, 0, 0.12);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  margin-top: 2rem;
  position: relative;
  z-index: 5;
}

.who-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2.5rem;
  position: relative;
  z-index: 2;
}

.who-cta-box h3,
.who-cta-text h3 {
  color: #FFFFFF !important;
  font-size: clamp(1.35rem, 2.5vw, 1.7rem);
  margin-bottom: 0.65rem;
  font-weight: 800;
  letter-spacing: -0.015em;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.who-cta-box p,
.who-cta-text p {
  color: #E2E8F0 !important;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.68;
  font-weight: 450;
  max-width: 650px;
}

.who-cta-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  white-space: nowrap;
  font-weight: 600;
  font-size: 1.02rem;
  padding: 1.1rem 2.25rem;
  border-radius: var(--radius-md, 12px);
  background: var(--gradient-brand, linear-gradient(135deg, #FF7A00 0%, #FF9433 100%));
  color: #FFFFFF !important;
  box-shadow: 0 4px 20px rgba(255, 122, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.who-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 122, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.who-cta-btn .btn-icon {
  width: 1.15rem;
  height: 1.15rem;
  transition: transform 0.25s ease;
}

.who-cta-btn:hover .btn-icon {
  transform: translateX(4px);
}

@media (max-width: 992px) {
  .who-cta-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
    text-align: left;
  }

  .who-cta-btn {
    width: 100%;
    white-space: normal;
    text-align: center;
    padding: 1rem 1.5rem;
  }
}

/* --------------------------------------------------------------------------
   Mobile & Responsive Adaptations (< 768px)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .who-stack-nav {
    overflow-x: auto;
    justify-content: flex-start;
    max-width: 100%;
    padding: 0.35rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .who-stack-nav::-webkit-scrollbar {
    display: none;
  }

  .who-nav-pill {
    padding: 0.45rem 0.9rem;
    font-size: 0.8rem;
  }

  /* Horizontal snap-scroll deck on mobile & small tablets */
  .who-stack-deck {
    min-height: auto;
    display: flex !important;
    flex-direction: row;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 1rem;
    padding: 0.5rem 0.25rem 1.25rem;
    margin-bottom: 2rem;
  }

  .who-stack-deck::-webkit-scrollbar {
    display: none;
  }

  .who-stack-card {
    position: relative;
    top: auto;
    left: auto;
    flex: 0 0 min(310px, 86vw);
    scroll-snap-align: center;
    padding: 1.35rem 1.15rem;
    border-radius: var(--radius-xl);
    box-sizing: border-box;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }

  .who-card-watermark {
    font-size: 4.5rem;
    right: 1rem;
    top: 0.5rem;
  }

  .who-card-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .who-match-btn {
    width: 100%;
    justify-content: center;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .who-cta-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
  }
}

/* ==========================================================================
   RESPONSIVE: SMALL & ULTRA-NARROW PHONES (<= 380px & 320px)
   ========================================================================== */
@media (max-width: 380px) {
  .who-stack-nav {
    padding: 0.25rem;
    gap: 0.35rem;
  }

  .who-nav-pill {
    padding: 0.35rem 0.65rem;
    font-size: 0.74rem;
  }

  .who-stack-card {
    padding: 1.15rem 0.85rem;
    border-radius: var(--radius-lg);
  }

  .who-title {
    font-size: 1.15rem;
  }

  .who-desc {
    font-size: 0.85rem;
  }

  .rec-label {
    font-size: 0.75rem;
  }

  .rec-tag {
    font-size: 0.72rem;
    padding: 0.2rem 0.5rem;
  }

  .who-fit-tag {
    font-size: 0.76rem;
  }

  .who-match-btn {
    font-size: 0.76rem;
    padding: 0.45rem 0.85rem;
  }

  .who-cta-box {
    padding: 1.25rem 0.85rem;
    border-radius: var(--radius-lg);
  }

  .who-cta-box h3,
  .who-cta-text h3 {
    font-size: 1.2rem;
    color: #FFFFFF !important;
  }

  .who-cta-box p,
  .who-cta-text p {
    font-size: 0.85rem;
    color: #E2E8F0 !important;
  }
}

/* --------------------------------------------------------------------------
   Accessibility: Prefers Reduced Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .who-stack-deck {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
  }

  .who-stack-card {
    position: relative !important;
    top: auto !important;
    left: auto !important;
    transform: none !important;
    opacity: 1 !important;
    filter: none !important;
  }

  .who-nav-pill {
    transition: none;
  }
}


/* ==========================================================================
   COMPREHENSIVE LIGHT THEME OPTIMIZATION: WHO CAN JOIN SECTION
   ========================================================================== */
.section-light.who-join-section {
  background-color: #F8FAFC !important;
  color: #0F172A !important;
}

.section-light .who-nav-track {
  background: #FFFFFF !important;
  border: 1.5px solid #E2E8F0 !important;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.05) !important;
}

.section-light .who-nav-pill {
  color: #64748B !important;
}

.section-light .who-nav-pill:hover {
  color: #0F172A !important;
  background: #F8FAFC !important;
}

.section-light .who-nav-pill.is-active {
  background: #FFF7ED !important;
  border-color: #FED7AA !important;
  color: #C2410C !important;
  box-shadow: 0 2px 8px rgba(255, 122, 0, 0.15) !important;
}

.section-light .who-stack-card {
  background: #FFFFFF !important;
  border: 1.5px solid #E2E8F0 !important;
  border-top: 4px solid var(--accent-color, var(--color-brand)) !important;
  box-shadow: 0 12px 36px -8px rgba(15, 23, 42, 0.08) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

.section-light .who-stack-card:hover {
  border-color: var(--accent-color, var(--color-brand)) !important;
  border-top-color: var(--accent-color, var(--color-brand)) !important;
  box-shadow: 0 18px 45px -8px rgba(15, 23, 42, 0.14) !important;
}

.section-light .who-card-watermark {
  color: #E2E8F0 !important;
  opacity: 0.65 !important;
}

.section-light .who-card-glow {
  display: none !important;
}

.section-light .who-title {
  color: #0F172A !important;
}

.section-light .who-desc {
  color: #334155 !important;
}

.section-light .who-badge {
  background: #FFF7ED !important;
  border-color: #FED7AA !important;
  color: #C2410C !important;
}

.section-light .who-counter {
  color: #64748B !important;
}

.section-light .who-recommended {
  border-top-color: #E2E8F0 !important;
}

.section-light .rec-label {
  color: #0F172A !important;
}

.section-light .rec-tag {
  background: #F1F5F9 !important;
  color: #334155 !important;
  border: 1px solid #E2E8F0 !important;
}

.section-light .rec-tag:hover {
  border-color: var(--color-brand) !important;
  color: #0F172A !important;
}

.section-light .who-fit-tag {
  background: #F0FDF4 !important;
  border: 1px solid #BBF7D0 !important;
  color: #166534 !important;
}

.section-light .who-match-btn {
  background: #F8FAFC !important;
  border: 1px solid #E2E8F0 !important;
  color: #0F172A !important;
}

.section-light .who-match-btn:hover {
  background: #FFF7ED !important;
  border-color: #FED7AA !important;
  color: #C2410C !important;
}