/* ============================================
   DESIGN TOKENS - Edit these for theming
   ============================================ */
:root {
  /* Colors - Dark Theme */
  --color-bg-primary: #0a0e1a;
  --color-bg-secondary: #141927;
  --color-bg-tertiary: #1e2534;
  --color-bg-input: #1a1f2e;
  --color-bg-hover: #252d40;
  
  --color-text-primary: #f0f4f8;
  --color-text-secondary: #b4bcc8;
  --color-text-muted: #7a8495;
  
  --color-border: #2d3748;
  --color-border-focus: #4a7aff;
  
  --color-accent-primary: #4a7aff;
  --color-accent-hover: #3d6de6;
  --color-accent-active: #2f5acc;
  
  --color-success: #3ddc97;
  --color-warning: #ffb74d;
  --color-danger: #ff5252;
  
  /* Tag colors */
  --color-tag-starter: #9c88ff;
  --color-tag-system: #4a7aff;
  --color-tag-growth: #3ddc97;
  --color-tag-multi: #ffb74d;
  --color-tag-enterprise: #ff6b9d;
  
  --color-tag-aware: #7a8495;
  --color-tag-curious: #4a7aff;
  --color-tag-active: #3ddc97;
  --color-tag-integrated: #ffb74d;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Courier New', monospace;
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  
  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.container-wide {
  max-width: 1200px;
}

.header {
  text-align: center;
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 2px solid var(--color-border);
}

.header h1 {
  font-size: var(--text-4xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--color-accent-primary), #9c88ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-md);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-bottom: var(--space-lg);
  color: var(--color-text-primary);
}

.section-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}

.form-label-required::after {
  content: ' *';
  color: var(--color-danger);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background-color: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
  border-color: var(--color-accent-primary);
  background-color: var(--color-bg-tertiary);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  background-color: var(--color-bg-tertiary);
  box-shadow: 0 0 0 3px rgba(74, 122, 255, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23b4bcc8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  background-size: 20px;
  padding-right: var(--space-2xl);
}

.form-hint {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-base);
  font-weight: 600;
  font-family: var(--font-sans);
  text-decoration: none;
  color: var(--color-text-primary);
  background-color: var(--color-accent-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn:active {
  background-color: var(--color-accent-active);
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(74, 122, 255, 0.3);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.btn-secondary:hover {
  background-color: var(--color-bg-hover);
}

.btn-danger {
  background-color: var(--color-danger);
}

.btn-danger:hover {
  background-color: #e63946;
}

.btn-group {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

/* ============================================
   TAGS & BADGES
   ============================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-xl);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.tag-starter { background-color: rgba(156, 136, 255, 0.15); border-color: var(--color-tag-starter); color: var(--color-tag-starter); }
.tag-system { background-color: rgba(74, 122, 255, 0.15); border-color: var(--color-tag-system); color: var(--color-tag-system); }
.tag-growth { background-color: rgba(61, 220, 151, 0.15); border-color: var(--color-tag-growth); color: var(--color-tag-growth); }
.tag-multi { background-color: rgba(255, 183, 77, 0.15); border-color: var(--color-tag-multi); color: var(--color-tag-multi); }
.tag-enterprise { background-color: rgba(255, 107, 157, 0.15); border-color: var(--color-tag-enterprise); color: var(--color-tag-enterprise); }

.tag-aware { background-color: rgba(122, 132, 149, 0.15); border-color: var(--color-tag-aware); color: var(--color-tag-aware); }
.tag-curious { background-color: rgba(74, 122, 255, 0.15); border-color: var(--color-tag-curious); color: var(--color-tag-curious); }
.tag-active { background-color: rgba(61, 220, 151, 0.15); border-color: var(--color-tag-active); color: var(--color-tag-active); }
.tag-integrated { background-color: rgba(255, 183, 77, 0.15); border-color: var(--color-tag-integrated); color: var(--color-tag-integrated); }

.tags-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

/* ============================================
   CARDS & LISTS
   ============================================ */
.card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-md);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.card-text {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.list-styled {
  list-style: none;
  padding: 0;
}

.list-styled li {
  position: relative;
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.list-styled li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent-primary);
  font-weight: bold;
}

/* ============================================
   TABLE
   ============================================ */
.table-wrapper {
  overflow-x: auto;
  margin: var(--space-lg) 0;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th,
.table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  background-color: var(--color-bg-tertiary);
}

.table td {
  color: var(--color-text-primary);
}

.table tr:hover td {
  background-color: var(--color-bg-hover);
}

/* ============================================
   PROGRESS BAR
   ============================================ */
.progress-bar {
  width: 100%;
  height: 6px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-xl);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-primary), #9c88ff);
  border-radius: var(--radius-xl);
  transition: width var(--transition-slow);
}

/* ============================================
   SEARCH BOX
   ============================================ */
.search-box {
  position: relative;
  margin-bottom: var(--space-lg);
}

.search-input {
  width: 100%;
  padding: var(--space-md) var(--space-md) var(--space-md) var(--space-3xl);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(74, 122, 255, 0.1);
}

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

/* ============================================
   GLOSSARY
   ============================================ */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-md);
}

.glossary-term {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.glossary-term:hover {
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-md);
}

.glossary-term-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-accent-primary);
  margin-bottom: var(--space-sm);
}

.glossary-term-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.glossary-no-results {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.hidden { display: none !important; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

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

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .container {
    padding: var(--space-lg) var(--space-md);
  }
  
  .header h1 {
    font-size: var(--text-3xl);
  }
  
  .header p {
    font-size: var(--text-base);
  }
  
  .section {
    padding: var(--space-lg);
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .glossary-grid {
    grid-template-columns: 1fr;
  }
  
  .table {
    font-size: var(--text-xs);
  }
  
  .table th,
  .table td {
    padding: var(--space-sm);
  }
}

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