/*--------------------------------------------------------------
# Introduction Section - Professional 6-Card Layout
--------------------------------------------------------------*/
.intro-section {
  background: linear-gradient(135deg, 
    color-mix(in srgb, var(--surface-color), transparent 95%) 0%, 
    color-mix(in srgb, var(--accent-color), transparent 97%) 100%);
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}

.intro-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, color-mix(in srgb, var(--accent-color), transparent 95%) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, color-mix(in srgb, var(--accent-color), transparent 95%) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.intro-section .container {
  position: relative;
  z-index: 1;
}

.intro-section .section-header h2 {
  color: var(--heading-color);
  font-size: 2.75rem;
  font-weight: 700;
  margin-bottom: 15px;
  background: linear-gradient(135deg, var(--heading-color) 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.intro-section .accent-line {
  transition: all 0.3s ease;
}

.intro-section:hover .accent-line {
  width: 120px !important;
}

/* Card Styles - Professional Design */
.intro-card {
  background: var(--surface-color);
  padding: 35px 30px;
  border-radius: 20px;
  border: 1px solid color-mix(in srgb, var(--accent-color), transparent 85%);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  min-height: 400px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  background: linear-gradient(135deg, 
    var(--surface-color) 0%, 
    color-mix(in srgb, var(--surface-color), var(--accent-color) 3%) 100%);
}

.intro-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent 0%, 
    color-mix(in srgb, var(--accent-color), transparent 85%) 50%, 
    transparent 100%);
  transition: left 0.7s ease;
}

.intro-card:hover::before {
  left: 100%;
}

.intro-card:hover {
  transform: translateY(-10px) scale(1.02);
  border-color: var(--accent-color);
  box-shadow: 
    0 25px 60px color-mix(in srgb, var(--accent-color), transparent 75%),
    0 0 0 1px color-mix(in srgb, var(--accent-color), transparent 50%);
}

/* Icon Styles - Enhanced */
.intro-card .card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, 
    color-mix(in srgb, var(--accent-color), transparent 78%) 0%, 
    color-mix(in srgb, var(--accent-color), transparent 90%) 100%);
  border-radius: 50%;
  position: relative;
  transition: all 0.5s ease;
  flex-shrink: 0;
  box-shadow: 0 6px 20px rgba(0, 217, 255, 0.2);
}

.intro-card .card-icon i {
  font-size: 2.5rem;
  color: var(--accent-color);
  position: relative;
  z-index: 2;
  transition: all 0.5s ease;
}

.intro-card .card-icon::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-color), transparent);
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 1;
}

.intro-card:hover .card-icon::before {
  opacity: 1;
  animation: rotate 3s linear infinite;
}

.intro-card:hover .card-icon {
  transform: scale(1.2) rotate(10deg);
  box-shadow: 0 10px 30px rgba(0, 217, 255, 0.4);
}

.intro-card:hover .card-icon i {
  transform: scale(1.1);
  color: var(--contrast-color);
  filter: drop-shadow(0 0 15px var(--accent-color));
}

/* Title Styles - Enhanced */
.intro-card .card-title {
  color: var(--heading-color);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 18px;
  position: relative;
  transition: all 0.3s ease;
  letter-spacing: -0.5px;
  line-height: 1.3;
}

.intro-card:hover .card-title {
  color: var(--accent-color);
  transform: translateX(5px);
}

/* Text Styles - Enhanced */
.intro-card .card-text {
  color: var(--default-color);
  font-size: 0.98rem;
  line-height: 1.8;
  text-align: left;
  margin: 0;
  flex-grow: 1;
  position: relative;
  z-index: 2;
}

.intro-card .card-text strong {
  color: var(--accent-color);
  font-weight: 600;
}

/* Grid Layout - Optimized */
.intro-section .row {
  margin-bottom: 0;
}

.intro-section .row.g-4 {
  row-gap: 2.5rem !important;
  column-gap: 2rem !important;
}

.intro-section .row.mb-4 {
  margin-bottom: 2.5rem !important;
}

/* Equal height columns */
.intro-section [class*='col-'] {
  display: flex;
  flex-direction: column;
}

/* Responsive Design - Enhanced */
@media (max-width: 1200px) {
  .intro-section {
    padding: 75px 0;
  }
  
  .intro-card {
    padding: 32px 26px;
    min-height: 420px;
  }
  
  .intro-card .card-icon {
    width: 75px;
    height: 75px;
  }
  
  .intro-card .card-icon i {
    font-size: 2.3rem;
  }
  
  .intro-card .card-title {
    font-size: 1.3rem;
  }
  
  .intro-card .card-text {
    font-size: 0.95rem;
  }
}

@media (max-width: 992px) {
  .intro-section {
    padding: 65px 0;
  }
  
  .intro-section .section-header h2 {
    font-size: 2.25rem;
  }
  
  .intro-section .row.mb-4 {
    margin-bottom: 2rem !important;
  }
  
  .intro-section .row.g-4 {
    row-gap: 2rem !important;
    column-gap: 1.5rem !important;
  }
  
  .intro-card {
    padding: 30px 25px;
    margin-bottom: 0;
    min-height: 380px;
  }
  
  .intro-card .card-icon {
    width: 70px;
    height: 70px;
  }
  
  .intro-card .card-icon i {
    font-size: 2.1rem;
  }
  
  .intro-card .card-title {
    font-size: 1.25rem;
  }
  
  .intro-card .card-text {
    font-size: 0.93rem;
  }
}

@media (max-width: 768px) {
  .intro-section {
    padding: 50px 0;
  }
  
  .intro-section .section-header h2 {
    font-size: 1.75rem;
  }
  
  .intro-card {
    padding: 25px;
    text-align: center;
    min-height: auto;
  }
  
  .intro-card .card-icon {
    width: 65px;
    height: 65px;
    margin: 0 auto 20px;
  }
  
  .intro-card .card-icon i {
    font-size: 1.85rem;
  }
  
  .intro-card .card-text {
    font-size: 0.95rem;
    text-align: center;
  }
  
  .intro-card .card-title {
    font-size: 1.25rem;
    text-align: center;
  }
  
  .intro-section .row.g-4 {
    row-gap: 1.5rem !important;
  }
}

/* Animation Keyframes */
@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

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

/* Accessibility improvements */
.intro-card:focus-within {
  outline: 2px solid var(--accent-color);
  outline-offset: 4px;
}

/* Print styles */
@media print {
  .intro-section {
    background: white !important;
    padding: 20px 0 !important;
  }
  
  .intro-card {
    border: 1px solid #ddd !important;
    break-inside: avoid;
    margin-bottom: 20px !important;
  }
  
  .intro-card::before,
  .intro-section::before {
    display: none !important;
  }
}

/* Additional Professional Touches */
.intro-section .section-header {
  margin-bottom: 50px;
}

.intro-card:nth-child(1) { animation-delay: 0.1s; }
.intro-card:nth-child(2) { animation-delay: 0.2s; }
.intro-card:nth-child(3) { animation-delay: 0.3s; }
.intro-card:nth-child(4) { animation-delay: 0.4s; }
.intro-card:nth-child(5) { animation-delay: 0.5s; }
.intro-card:nth-child(6) { animation-delay: 0.6s; }