/* ================================================
   ChainSync - Premium Visual Enhancements
   Adds sophisticated polish without changing functionality
   ================================================ */

/* ================================================
   PREMIUM FOUNDATIONS
   ================================================ */

/* Vibrant background texture for depth */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(168, 85, 247, 0.03) 0%, transparent 50%),
    url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMDAiIGhlaWdodD0iMzAwIj48ZmlsdGVyIGlkPSJhIiB4PSIwIiB5PSIwIj48ZmVUdXJidWxlbmNlIGJhc2VGcmVxdWVuY3k9Ii43NSIgc3RpdGNoVGlsZXM9InN0aXRjaCIgdHlwZT0iZnJhY3RhbE5vaXNlIi8+PGZlQ29sb3JNYXRyaXggdHlwZT0ic2F0dXJhdGUiIHZhbHVlcz0iMCIvPjwvZmlsdGVyPjxwYXRoIGQ9Ik0wIDBoMzAwdjMwMEgweiIgZmlsdGVyPSJ1cmwoI2EpIiBvcGFjaXR5PSIuMDIiLz48L3N2Zz4=');
  pointer-events: none;
  z-index: 0;
}

body > * {
  position: relative;
  z-index: 1;
}

/* ================================================
   PREMIUM TYPOGRAPHY ENHANCEMENTS
   ================================================ */

h1, h2, h3, h4, h5, h6 {
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

h1 {
  background: linear-gradient(135deg, #0F172A 0%, #334155 50%, #6366F1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}

p {
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.01);
}

/* ================================================
   PREMIUM CARDS & SURFACES
   ================================================ */

.feature-card,
.tech-card,
.scenario-card,
.step-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.04),
    0 8px 24px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
  position: relative;
  overflow: hidden;
}

.feature-card::before,
.tech-card::before,
.scenario-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    rgba(99, 102, 241, 0.6) 0%,
    rgba(6, 182, 212, 0.6) 50%,
    rgba(168, 85, 247, 0.6) 100%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
}

.feature-card:hover::before,
.tech-card:hover::before,
.scenario-card:hover::before {
  opacity: 1;
}

.feature-card:hover,
.tech-card:hover,
.scenario-card:hover,
.step-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow:
    0 8px 24px rgba(99, 102, 241, 0.12),
    0 16px 48px rgba(139, 92, 246, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    0 0 40px rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.3);
}

/* ================================================
   PREMIUM BUTTONS
   ================================================ */

.btn-primary,
.btn-secondary,
.nav-cta {
  position: relative;
  overflow: hidden;
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.1),
    0 4px 16px rgba(99, 102, 241, 0.25),
    0 0 20px rgba(139, 92, 246, 0.15);
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.btn-primary::before,
.btn-secondary::before,
.nav-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn-primary:hover::before,
.btn-secondary:hover::before,
.nav-cta:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary:hover,
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.15),
    0 8px 32px rgba(99, 102, 241, 0.35),
    0 0 48px rgba(139, 92, 246, 0.25);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.15),
    0 8px 32px rgba(27, 79, 114, 0.20);
}

.btn-primary:active,
.btn-secondary:active,
.nav-cta:active {
  transform: translateY(0);
  box-shadow:
    0 1px 4px rgba(0, 0, 0, 0.1),
    0 2px 8px rgba(44, 95, 79, 0.15);
}

/* ================================================
   PREMIUM HERO SECTION
   ================================================ */

.hero {
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to bottom, transparent 0%, var(--bg-primary) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
  animation: heroTitleFadeIn 1s ease-out;
}

.hero-subtitle {
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.08));
  animation: heroSubtitleFadeIn 1s ease-out 0.2s backwards;
}

@keyframes heroTitleFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroSubtitleFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ================================================
   PREMIUM NAVIGATION
   ================================================ */

#navbar {
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(255, 255, 255, 0.85);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.04),
    0 4px 16px rgba(0, 0, 0, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
}

#navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.08),
    0 8px 32px rgba(0, 0, 0, 0.10);
}

.nav-links a {
  position: relative;
  transition: all 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg,
    var(--forest-primary) 0%,
    var(--ocean-medium) 100%
  );
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  transform: translateX(-50%);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover {
  transform: translateY(-2px);
}

/* ================================================
   PREMIUM SECTIONS
   ================================================ */

section {
  position: relative;
}

.section-tag {
  background: linear-gradient(135deg,
    rgba(44, 95, 79, 0.08) 0%,
    rgba(27, 79, 114, 0.08) 100%
  );
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(44, 95, 79, 0.15);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  transition: all 0.3s ease;
}

.section-tag:hover {
  transform: scale(1.05);
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

/* ================================================
   PREMIUM STAT ITEMS
   ================================================ */

.stat-item {
  background: linear-gradient(135deg,
    rgba(255, 255, 255, 0.9) 0%,
    rgba(255, 255, 255, 0.7) 100%
  );
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.06),
    0 8px 32px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.stat-item:hover {
  transform: translateY(-8px) scale(1.05);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.10),
    0 16px 64px rgba(0, 0, 0, 0.12);
  background: linear-gradient(135deg,
    rgba(255, 255, 255, 1) 0%,
    rgba(255, 255, 255, 0.9) 100%
  );
}

.stat-number {
  background: linear-gradient(135deg,
    var(--forest-primary) 0%,
    var(--ocean-medium) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* ================================================
   PREMIUM ICONS & GRAPHICS
   ================================================ */

.feature-icon,
.scenario-icon,
.tech-icon {
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.08));
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.feature-card:hover .feature-icon,
.scenario-card:hover .scenario-icon,
.tech-card:hover .tech-icon {
  transform: scale(1.1) rotateZ(5deg);
  filter: drop-shadow(0 8px 24px rgba(44, 95, 79, 0.20));
}

/* ================================================
   PREMIUM PROCESS FLOW
   ================================================ */

.process-step {
  background: linear-gradient(135deg,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(255, 255, 255, 0.85) 100%
  );
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.06),
    0 8px 32px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.process-step:hover {
  transform: translateY(-12px) scale(1.03);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.12),
    0 20px 60px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 1);
}

.step-number {
  background: linear-gradient(135deg,
    var(--forest-primary) 0%,
    var(--ocean-medium) 100%
  );
  box-shadow:
    0 4px 16px rgba(44, 95, 79, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* ================================================
   PREMIUM FOOTER
   ================================================ */

footer {
  background: linear-gradient(135deg,
    var(--forest-primary) 0%,
    var(--ocean-deep) 100%
  );
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCI+PGNpcmNsZSBjeD0iMiIgY3k9IjIiIHI9IjEiIGZpbGw9InJnYmEoMjU1LDI1NSwyNTUsMC4wNSkiLz48L3N2Zz4=');
  opacity: 0.4;
}

footer > * {
  position: relative;
  z-index: 1;
}

/* ================================================
   PREMIUM FORMS & INPUTS
   ================================================ */

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(44, 95, 79, 0.15);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: all 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus,
select:focus {
  background: rgba(255, 255, 255, 1);
  border-color: var(--forest-primary);
  box-shadow:
    0 0 0 3px rgba(44, 95, 79, 0.10),
    0 4px 16px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 1);
}

/* ================================================
   PREMIUM ANIMATIONS & TRANSITIONS
   ================================================ */

@media (prefers-reduced-motion: no-preference) {
  /* Smooth scroll reveal */
  .fade-in-section {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.1, 0.25, 1),
                transform 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
  }

  .fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* Stagger animations */
  .feature-grid .feature-card,
  .grid-3 > * {
    animation: cardFadeIn 0.6s ease-out backwards;
  }

  .feature-grid .feature-card:nth-child(1),
  .grid-3 > *:nth-child(1) {
    animation-delay: 0.1s;
  }

  .feature-grid .feature-card:nth-child(2),
  .grid-3 > *:nth-child(2) {
    animation-delay: 0.2s;
  }

  .feature-grid .feature-card:nth-child(3),
  .grid-3 > *:nth-child(3) {
    animation-delay: 0.3s;
  }

  .feature-grid .feature-card:nth-child(4),
  .grid-3 > *:nth-child(4) {
    animation-delay: 0.4s;
  }

  @keyframes cardFadeIn {
    from {
      opacity: 0;
      transform: translateY(30px) scale(0.95);
    }
    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }
}

/* ================================================
   PREMIUM HOVER GLOW EFFECTS
   ================================================ */

.btn-primary:hover,
.nav-cta:hover {
  filter: brightness(1.05);
}

.feature-card:hover,
.tech-card:hover,
.scenario-card:hover {
  filter: brightness(1.02);
}

/* ================================================
   PREMIUM LOADING STATES
   ================================================ */

.page-loader {
  background: linear-gradient(135deg,
    rgba(255, 255, 255, 0.98) 0%,
    rgba(250, 251, 252, 0.98) 100%
  );
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.loader-spinner {
  box-shadow: 0 4px 16px rgba(44, 95, 79, 0.20);
}

/* ================================================
   PREMIUM SCROLL PROGRESS
   ================================================ */

.scroll-progress {
  background: linear-gradient(90deg,
    var(--forest-primary) 0%,
    var(--ocean-medium) 50%,
    var(--terracotta) 100%
  );
  box-shadow:
    0 2px 8px rgba(44, 95, 79, 0.30),
    0 0 20px rgba(44, 95, 79, 0.20);
}

/* ================================================
   PREMIUM RESPONSIVE REFINEMENTS
   ================================================ */

@media (max-width: 768px) {
  /* Reduce shadow complexity on mobile for performance */
  .feature-card,
  .tech-card,
  .scenario-card,
  .step-card {
    box-shadow:
      0 2px 8px rgba(0, 0, 0, 0.06),
      0 4px 16px rgba(0, 0, 0, 0.08);
  }

  .feature-card:hover,
  .tech-card:hover,
  .scenario-card:hover,
  .step-card:hover {
    box-shadow:
      0 4px 16px rgba(0, 0, 0, 0.10),
      0 8px 32px rgba(0, 0, 0, 0.12);
  }
}

/* ================================================
   PREMIUM ACCESSIBILITY
   ================================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .feature-card,
  .tech-card,
  .scenario-card,
  .step-card {
    border: 2px solid var(--text-primary);
  }
}