/* Bento Grid System for NDTechHub - Fully Responsive */

/* Grid Container */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(130px, auto);
  gap: 20px;
  width: 100%;
  animation: fadeIn 1s ease-out;
}

/* Card Styling */
.bento-card {
  grid-column: span 4; /* Default to 3 columns per row (4/12) */
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.02);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}

/* Card Glow Effect (Radial Gradient following Mouse cursor via JS) */
.bento-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    300px circle at var(--mouse-x, 0px) var(--mouse-y, 0px),
    rgba(0, 242, 254, 0.06),
    transparent 80%
  );
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 0;
  pointer-events: none;
}

[data-theme="light"] .bento-card::before {
  background: radial-gradient(
    250px circle at var(--mouse-x, 0px) var(--mouse-y, 0px),
    rgba(2, 132, 199, 0.04),
    transparent 85%
  );
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: var(--card-hover-border);
  box-shadow: 0 12px 35px -12px var(--accent-glow);
}

.bento-card:hover::before {
  opacity: 1;
}

/* Ensure all children of bento-card stay above the cursor trail background */
.bento-card > * {
  position: relative;
  z-index: 2;
}

/* Grid Column & Row Spans */
.col-span-1  { grid-column: span 1; }
.col-span-2  { grid-column: span 2; }
.col-span-3  { grid-column: span 3; }
.col-span-4  { grid-column: span 4; }
.col-span-5  { grid-column: span 5; }
.col-span-6  { grid-column: span 6; }
.col-span-7  { grid-column: span 7; }
.col-span-8  { grid-column: span 8; }
.col-span-9  { grid-column: span 9; }
.col-span-10 { grid-column: span 10; }
.col-span-11 { grid-column: span 11; }
.col-span-12 { grid-column: span 12; }

.row-span-2 { grid-row: span 2; }
.row-span-3 { grid-row: span 3; }
.row-span-4 { grid-row: span 4; }

/* Bento Card Elements */
.card-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--border-radius-md);
  background: rgba(0, 242, 254, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: 24px;
  border: 1px solid rgba(0, 242, 254, 0.12);
  transition: var(--transition-smooth);
}

[data-theme="light"] .card-icon {
  background: rgba(2, 132, 199, 0.05);
  border-color: rgba(2, 132, 199, 0.1);
}

.bento-card:hover .card-icon {
  transform: scale(1.08);
  background: rgba(0, 242, 254, 0.1);
  border-color: rgba(0, 242, 254, 0.25);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.card-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: 12px;
  display: inline-block;
}

.card-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
  font-weight: 500;
  line-height: 1.6;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-primary);
}

.card-footer svg {
  transition: var(--transition-smooth);
}

.bento-card:hover .card-footer svg {
  transform: translateX(4px);
}

/* Specialized Featured Layouts */
.card-featured {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.08) 0%, rgba(79, 172, 254, 0.04) 50%, rgba(127, 0, 255, 0.08) 100%);
  border: 1px solid rgba(0, 242, 254, 0.15);
}

.card-featured:hover {
  border-color: rgba(0, 242, 254, 0.35);
  box-shadow: 0 15px 45px -10px rgba(0, 242, 254, 0.25);
}

/* Responsive Grid Adapters */

/* Tablet & Smaller Desktop Screens */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(8, 1fr);
  }
  
  /* Remap spans to fit 8 columns nicely */
  .col-span-12, .col-span-10, .col-span-9, .col-span-8 { grid-column: span 8; }
  .col-span-7, .col-span-6, .col-span-5 { grid-column: span 4; }
  .col-span-4, .col-span-3 { grid-column: span 4; }
  .col-span-2 { grid-column: span 2; }
}

/* Small Tablets / Large Mobile */
@media (max-width: 768px) {
  .bento-grid {
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(120px, auto);
    gap: 16px;
  }
  
  .bento-card {
    padding: 24px;
    border-radius: var(--border-radius-md);
  }
  
  .col-span-12, .col-span-10, .col-span-9, .col-span-8, .col-span-7, .col-span-6, .col-span-5, .col-span-4 {
    grid-column: span 4;
  }
  
  .col-span-3, .col-span-2 {
    grid-column: span 2;
  }
}

/* Small Mobile Screens */
@media (max-width: 480px) {
  .bento-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
    gap: 14px;
  }
  
  .bento-card {
    grid-column: span 1 !important;
    grid-row: span 1 !important;
    padding: 22px;
  }
  
  .card-title {
    font-size: 19px;
  }
  
  .card-desc {
    margin-bottom: 16px;
  }
}