/* ===== HUB (Landing Page) ===== */

#hub {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--bg-gradient);
  transition: opacity var(--transition-slow) ease;
}

/* ----- Logo section ----- */
.logo-section {
  text-align: center;
  padding: 30px 0 50px;
  opacity: 0;
  transform: translateY(-20px);
  animation: fadeInDown 0.6s ease 0.1s forwards;
}
.logo-section h1 {
  font-size: 2.6rem;
  font-weight: 300;
  letter-spacing: 6px;
  text-transform: uppercase;
  background: var(--accent-gradient-logo);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-section .subtitle {
  font-size: 0.85rem;
  color: var(--text-faint);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-top: 4px;
}

/* ----- Modules container ----- */
.modules-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 32px 40px;
  gap: 24px;
  max-width: 680px;
  margin: 0 auto;
  width: 100%;
}

.category {
  width: 100%;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards;
}
.category:nth-child(1) { animation-delay: 0.2s; }
.category:nth-child(2) { animation-delay: 0.35s; }
.category:nth-child(3) { animation-delay: 0.5s; }
.category:nth-child(4) { animation-delay: 0.65s; }

.category-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 12px;
  padding-left: 4px;
}

/* ----- Tile grids ----- */
.tiles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  width: 100%;
}

.tiles-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

/* ----- Individual tile ----- */
.tile {
  position: relative;
  background: var(--surface-2);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-lg);
  padding: 20px 12px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: all var(--transition-slow) var(--ease-out);
  overflow: hidden;
  aspect-ratio: 1;
}
.tile::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(234, 179, 8, 0.03));
  opacity: 0;
  transition: opacity var(--transition-slow);
}
.tile:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}
.tile:hover::before { opacity: 0; }
.tile:active { transform: translateY(-2px) scale(0.98); }

/* ----- Disabled tiles ----- */
.tile--disabled {
  cursor: not-allowed;
  pointer-events: none;
}
.tile--disabled .tile-icon {
  background: rgba(255, 255, 255, 0.05) !important;
  color: rgba(255, 255, 255, 0.2) !important;
}
.tile--disabled .tile-label {
  color: rgba(255, 255, 255, 0.2);
}

.tile-icon {
  position: relative;
  z-index: 1;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: transform var(--transition-slow);
}
.tile:hover .tile-icon { transform: scale(1.1); }

.tile-label {
  position: relative;
  z-index: 1;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.3;
}

.tile-badge {
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 0.5rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text-faint);
  z-index: 2;
}

/* ----- Category color accents ----- */
.cat-sales .tile-icon       { background: rgba(245, 158, 11, 0.15); color: var(--cat-sales); }
.cat-sales .tile:hover      { border-color: rgba(245, 158, 11, 0.35); }
.cat-sales .tile::before    { background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(234, 179, 8, 0.03)); }

.cat-purchasing .tile-icon    { background: rgba(59, 130, 246, 0.15); color: var(--cat-purchasing); }
.cat-purchasing .tile:hover   { border-color: rgba(59, 130, 246, 0.35); }
.cat-purchasing .tile::before { background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(59, 130, 246, 0.03)); }

.cat-warehouse .tile-icon     { background: rgba(16, 185, 129, 0.15); color: var(--cat-warehouse); }
.cat-warehouse .tile:hover    { border-color: rgba(16, 185, 129, 0.35); }
.cat-warehouse .tile::before  { background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(16, 185, 129, 0.03)); }

.cat-system .tile-icon        { background: rgba(139, 92, 246, 0.15); color: var(--cat-system); }
.cat-system .tile:hover       { border-color: rgba(139, 92, 246, 0.35); }
.cat-system .tile::before     { background: linear-gradient(135deg, rgba(139, 92, 246, 0.08), rgba(139, 92, 246, 0.03)); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .tiles-row, .tiles-grid { grid-template-columns: repeat(2, 1fr); }
  .modules-container { max-width: 450px; }
}
@media (max-width: 768px) {
  .tiles-row, .tiles-grid { grid-template-columns: repeat(2, 1fr); }
  .logo-section h1 { font-size: 1.8rem; letter-spacing: 3px; }
  .modules-container { padding: 16px; gap: 20px; max-width: 100%; }
  .category-label { font-size: 0.65rem; margin-bottom: 10px; }
}
@media (max-width: 480px) {
  .tiles-row, .tiles-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .tile { padding: 10px 6px 8px; }
}