/* Hub CSS - Homepage specific styles */

/* CSS Variables */
:root {
  /* Base colors - all text meets 7:1 contrast on dark bg */
  --bg-primary: #0f0f1a;
  --bg-surface: #1a1a2e;
  --bg-hover: #252542;
  --border-color: #3d3d5a;
  --text-primary: #f0f0f0;
  --text-secondary: #c0c0c0;
  --text-muted: #a0a0a0;

  /* Accent colors - brightened for contrast */
  --accent-teal: #5aabab;
  --accent-blue: #7ac9d5;
  --accent-purple: #ab9aca;
  --accent-plum: #ba8aaa;
  --accent-rose: #c58a9a;
  --accent-sage: #8abaa0;

  /* Typography */
  --font-sans: system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'Fira Code', 'Consolas', monospace;
  --line-height: 1.6;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Base */
html {
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--line-height);
  min-height: 100vh;
  position: relative;
}

/* Aurora mesh gradient background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 20% 20%, rgba(90, 60, 140, 0.25) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 30%, rgba(60, 100, 160, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse 70% 50% at 70% 80%, rgba(50, 120, 120, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse 50% 60% at 10% 70%, rgba(100, 70, 150, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(60, 90, 130, 0.1) 0%, transparent 50%);
  filter: blur(40px);
  pointer-events: none;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-purple);
}

/* Header */
.hub-header {
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
}

.hub-title {
  font-family: 'Comfortaa', cursive;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #00e5e5 0%, #5ce1e6 35%, #c084fc 65%, #00e5c1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Search */
.search-container {
  max-width: 500px;
  margin: 0 auto;
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  padding-left: 3rem;
  font-size: 1rem;
  font-family: var(--font-sans);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(91, 127, 181, 0.2);
}

.search-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: var(--spacing-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  max-height: 400px;
  overflow-y: auto;
  z-index: 100;
  display: none;
}

.search-results.active {
  display: block;
}

.search-result-item {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--bg-hover);
}

.search-result-title {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.search-result-path {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.search-no-results {
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--text-secondary);
}

/* Main Content */
.hub-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

/* Category Grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

/* Category Card */
.category-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.category-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.category-card[data-color="teal"] {
  border-left: 3px solid var(--accent-teal);
}

.category-card[data-color="blue"] {
  border-left: 3px solid var(--accent-blue);
}

.category-card[data-color="purple"] {
  border-left: 3px solid var(--accent-purple);
}

.category-card[data-color="plum"] {
  border-left: 3px solid var(--accent-plum);
}

.category-card[data-color="rose"] {
  border-left: 3px solid var(--accent-rose);
}

.category-card[data-color="sage"] {
  border-left: 3px solid var(--accent-sage);
}

.category-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.category-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.category-icon svg {
  width: 100%;
  height: 100%;
}

.category-card[data-color="teal"] .category-icon {
  color: var(--accent-teal);
}

.category-card[data-color="blue"] .category-icon {
  color: var(--accent-blue);
}

.category-card[data-color="purple"] .category-icon {
  color: var(--accent-purple);
}

.category-card[data-color="plum"] .category-icon {
  color: var(--accent-plum);
}

.category-card[data-color="rose"] .category-icon {
  color: var(--accent-rose);
}

.category-card[data-color="sage"] .category-icon {
  color: var(--accent-sage);
}

.category-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.category-children {
  list-style: none;
  margin-left: calc(32px + var(--spacing-md));
}

.category-child {
  padding: var(--spacing-sm) 0;
}

.category-child a {
  color: var(--text-primary);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 500;
}

.category-child a:hover {
  color: var(--accent-blue);
}

.category-child a::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-blue);
  border-radius: 50%;
  flex-shrink: 0;
}

.category-child.has-children > span {
  color: var(--text-secondary);
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.category-child.has-children > span::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--border-color);
  border-radius: 50%;
  flex-shrink: 0;
}

.subcategory-list {
  list-style: none;
  margin-left: var(--spacing-md);
  margin-top: var(--spacing-xs);
}

.subcategory-item {
  padding: var(--spacing-xs) 0;
}

.subcategory-item a {
  color: var(--text-secondary);
  font-size: 1rem;
}

.subcategory-item a:hover {
  color: var(--text-primary);
}

.category-empty {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.9rem;
  margin-left: calc(32px + var(--spacing-md));
}

/* Footer */
.hub-footer {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hub-header {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .hub-title {
    font-size: 2rem;
  }

  .hub-main {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .category-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

/* Utility classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}