/* ===================================================================
   TNGI AI SUMMIT — SENIOR UX & WORLD-CLASS ANIMATION ENGINE
   Designed for Principal Product Architecture (Apple / Vercel Tier)
   =================================================================== */

/* 1. Global Custom Properties */
:root {
  --focus-glow-cyan: rgba(53, 195, 238, 0.45);
  --focus-glow-coral: rgba(255, 91, 73, 0.45);
  --focus-glow-purple: rgba(112, 0, 255, 0.35);
  --focus-glow-gold: rgba(255, 184, 0, 0.45);
  --focus-transition-curve: cubic-bezier(0.16, 1, 0.3, 1);
  --focus-transition-smooth: 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. Top Glass Reading Progress Stream */
#summit-reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  z-index: 10000;
  background: linear-gradient(90deg, #35c3ee 0%, #ff5b49 50%, #7000ff 100%);
  box-shadow: 0 0 12px rgba(53, 195, 238, 0.8), 0 0 20px rgba(255, 91, 73, 0.6);
  transition: width 0.1s linear;
  pointer-events: none;
}

/* 3. Ambient Radial Spotlight Backdrop Layer */
#summit-ambient-spotlight {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 195, 238, 0.14) 0%, rgba(255, 91, 73, 0.08) 45%, rgba(0, 0, 0, 0) 70%);
  filter: blur(50px);
  pointer-events: none;
  z-index: 2;
  transform: translate(-50%, -50%);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.6s ease;
  opacity: 0;
}

body.spotlight-active #summit-ambient-spotlight {
  opacity: 1;
}

/* 4. Distance-Based Continuous Focus-Blur Physics */
.focus-mode-active .summit-focus-target {
  transition: filter var(--focus-transition-smooth),
              opacity var(--focus-transition-smooth),
              transform var(--focus-transition-smooth),
              box-shadow var(--focus-transition-smooth),
              border-color var(--focus-transition-smooth);
  will-change: filter, opacity, transform;
}

.focus-mode-active .summit-focus-target:not(.in-focus) {
  filter: blur(var(--target-blur, 4px));
  opacity: var(--target-opacity, 0.36);
  transform: scale(var(--target-scale, 0.982));
  pointer-events: auto;
}

.focus-mode-active .summit-focus-target:not(.in-focus):hover {
  filter: blur(1px) !important;
  opacity: 0.85 !important;
  transform: scale(0.995) !important;
}

.focus-mode-active .summit-focus-target.in-focus,
.summit-focus-target.in-focus {
  filter: blur(0px) !important;
  opacity: 1 !important;
  transform: scale(1) translateY(0) !important;
}

/* Laser Focal Line & Active Reading Anchor */
.focus-mode-active p.summit-focus-target.in-focus,
.focus-mode-active .quote-box.summit-focus-target.in-focus,
.focus-mode-active .session-note-item.summit-focus-target.in-focus {
  border-left: 3px solid #35c3ee;
  padding-left: 14px;
  transition: border-color 0.4s ease, padding-left 0.4s ease;
}

.focus-mode-active .card.summit-focus-target.in-focus,
.focus-mode-active .speaker-card.summit-focus-target.in-focus,
.focus-mode-active .summit-card-focus.in-focus {
  box-shadow: 0 20px 48px rgba(26, 26, 60, 0.12), 0 0 0 1.5px var(--focus-glow-cyan) !important;
}

/* Category-Themed Neon Edge Lighting */
.speaker-card.category-keynote:hover { box-shadow: 0 24px 50px rgba(255, 91, 73, 0.25), 0 0 0 2px var(--focus-glow-coral) !important; }
.speaker-card.category-dev:hover { box-shadow: 0 24px 50px rgba(53, 195, 238, 0.25), 0 0 0 2px var(--focus-glow-cyan) !important; }
.speaker-card.category-leadership:hover { box-shadow: 0 24px 50px rgba(255, 184, 0, 0.25), 0 0 0 2px var(--focus-glow-gold) !important; }
.speaker-card.category-media:hover { box-shadow: 0 24px 50px rgba(112, 0, 255, 0.25), 0 0 0 2px var(--focus-glow-purple) !important; }

/* 5. 3D Card Perspective Physics & Magnetic Buttons */
.summit-3d-card {
  transition: transform 0.15s ease-out, box-shadow 0.25s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

.magnetic-btn {
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
  will-change: transform;
}

/* 6. Interactive Floating Glass Drawer ("Summit Session Switcher") */
#summit-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 32, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--focus-transition-curve);
}

#summit-drawer-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

#summit-session-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 380px;
  max-width: 90vw;
  background: rgba(10, 15, 29, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-left: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: -20px 0 50px rgba(0, 0, 0, 0.6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  color: #ffffff;
  font-family: 'Plus Jakarta Sans', -apple-system, sans-serif;
}

#summit-session-drawer.is-open {
  transform: translateX(0);
}

.drawer-header {
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(15, 23, 42, 0.6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.drawer-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: #ffffff;
  font-family: 'Syne', sans-serif;
}

.drawer-close-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
  font-size: 14px;
}

.drawer-close-btn:hover {
  background: rgba(255, 91, 73, 0.3);
  border-color: #FF5B49;
  transform: rotate(90deg);
}

.drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.drawer-speaker-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-decoration: none;
  color: #ffffff;
  transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.drawer-speaker-item:hover {
  background: rgba(0, 240, 255, 0.1);
  border-color: rgba(0, 240, 255, 0.35);
  transform: translateX(-3px);
  color: #ffffff;
}

.drawer-speaker-img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid rgba(0, 240, 255, 0.3);
  background: #0A0F1D;
}

.drawer-speaker-info {
  flex: 1;
  min-width: 0;
}

.drawer-speaker-name {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.drawer-speaker-session {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 7. Glassmorphic Summit HUD */
#summit-focus-toggle-container {
  position: fixed;
  bottom: calc(28px + env(safe-area-inset-bottom, 0px));
  right: 28px;
  z-index: 9990;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(22, 23, 42, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  padding: 8px 18px;
  border-radius: 999px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), 0 0 25px rgba(53, 195, 238, 0.2);
  color: #ffffff;
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  user-select: none;
  transition: transform 0.3s var(--focus-transition-curve), box-shadow 0.3s ease;
}

#summit-focus-toggle-container:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.38), 0 0 30px rgba(53, 195, 238, 0.4);
}

.summit-hud-divider {
  width: 1px;
  height: 16px;
  background: rgba(255, 255, 255, 0.2);
}

.summit-hud-btn {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.85);
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  transition: color 0.2s ease, background 0.2s ease;
}

.summit-hud-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

.summit-hud-badge {
  font-size: 11px;
  color: #35c3ee;
  background: rgba(53, 195, 238, 0.15);
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(53, 195, 238, 0.3);
}

.summit-focus-indicator-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #35c3ee;
  box-shadow: 0 0 10px #35c3ee;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.focus-mode-active .summit-focus-indicator-dot {
  background: #35c3ee;
  box-shadow: 0 0 12px #35c3ee, 0 0 20px #35c3ee;
  animation: summitPulseDot 2s infinite ease-in-out;
}

.focus-mode-off .summit-focus-indicator-dot {
  background: #7a7a9a;
  box-shadow: none;
  animation: none;
}

@keyframes summitPulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* 8. Reduced Motion & Mobile Overrides */
@media (max-width: 576px) {
  #summit-focus-toggle-container {
    bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    right: 16px;
    padding: 6px 12px;
    font-size: 11px;
    gap: 8px;
  }
  .summit-hud-badge {
    display: none;
  }
  #summit-session-drawer {
    width: 100vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  .focus-mode-active .summit-focus-target:not(.in-focus) {
    filter: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  #summit-focus-toggle-container,
  #summit-ambient-spotlight,
  #summit-reading-progress-bar,
  #summit-session-drawer {
    display: none !important;
  }
}

/* ==========================================================================
   Ecosystem Partners & Technical Sponsors Styles
   ========================================================================== */
.partners-section {
  position: relative;
  background: var(--navy, #0A0F1D);
  color: #fff;
  padding: 5rem 1.5rem;
  overflow: hidden;
}

.partners-section::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, rgba(112, 0, 255, 0) 70%);
  pointer-events: none;
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.partner-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1.25rem;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), 
              box-shadow 0.35s ease, 
              border-color 0.35s ease;
  position: relative;
}

.partner-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(0, 240, 255, 0.35);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 240, 255, 0.15);
}

.partner-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.partner-icon {
  width: 52px;
  height: 52px;
  border-radius: 0.85rem;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #00F0FF;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.partner-meta h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
  color: #ffffff;
  font-family: 'Syne', sans-serif;
}

.partner-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.2rem 0.65rem;
  border-radius: 50px;
  margin-top: 0.25rem;
}

.partner-tag--tech { background: rgba(0, 240, 255, 0.15); color: #00F0FF; border: 1px solid rgba(0, 240, 255, 0.3); }
.partner-tag--edu { background: rgba(255, 184, 0, 0.15); color: #FFB800; border: 1px solid rgba(255, 184, 0, 0.3); }
.partner-tag--grant { background: rgba(112, 0, 255, 0.15); color: #B380FF; border: 1px solid rgba(112, 0, 255, 0.3); }
.partner-tag--impact { background: rgba(255, 91, 73, 0.15); color: #FF5B49; border: 1px solid rgba(255, 91, 73, 0.3); }

.partner-body {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.partner-perk {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 0.75rem;
  padding: 0.65rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: #00F0FF;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.partner-perk i {
  font-size: 1rem;
}