/**
 * AstroFusion Design System - Site Styles
 * Matches localhost:3000/design with sidebar, light theme default
 */

/* ============================================================================
   CSS Variables (Light Theme Default)
   ============================================================================ */

:root {
  /* Colors - Light Theme */
  --background: #ffffff;
  --foreground: #0f172a;
  --muted: #f1f5f9;
  --muted-foreground: #64748b;
  --border: #e2e8f0;
  --primary: #6366f1;
  --primary-foreground: #ffffff;
  --card: #ffffff;
  --card-foreground: #0f172a;
  
  /* Semantic Colors */
  --color-red-50: #fef2f2;
  --color-red-600: #dc2626;
  --color-red-700: #b91c1c;
  --color-green-50: #f0fdf4;
  --color-green-600: #16a34a;
  --color-amber-50: #fffbeb;
  --color-amber-600: #d97706;
  --color-cyan-50: #ecfeff;
  --color-cyan-600: #0891b2;
  --color-purple-50: #faf5ff;
  --color-purple-600: #9333ea;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  
  /* Borders */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  
  /* Sidebar */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 72px;
  --header-height: 64px;
}

/* Dark Theme */
[data-theme="dark"] {
  --background: #0f172a;
  --foreground: #f8fafc;
  --muted: #1e293b;
  --muted-foreground: #94a3b8;
  --border: #334155;
  --card: #1e293b;
  --card-foreground: #f8fafc;
}

/* ============================================================================
   Base Styles
   ============================================================================ */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--muted);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
}

/* ============================================================================
   Mobile Header
   ============================================================================ */

.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: var(--header-height);
  background: var(--background);
  border-bottom: 1px solid var(--border);
  padding: 0 var(--space-4);
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(8px);
}

@media (max-width: 1023px) {
  .mobile-header {
    display: flex;
  }
}

.mobile-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
}

.mobile-header__toggle {
  padding: var(--space-2);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--foreground);
  border-radius: var(--radius-md);
}

.mobile-header__toggle:hover {
  background: var(--muted);
}

/* ============================================================================
   Sidebar
   ============================================================================ */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--background);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 40;
  transition: transform 0.3s ease;
}

@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 35;
  backdrop-filter: blur(4px);
}

.sidebar-overlay.open {
  display: block;
}

.sidebar__header {
  padding: var(--space-6);
  padding-bottom: var(--space-2);
  flex-shrink: 0;
}

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.125rem;
}

.brand-logo {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), #9333ea);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.brand-name {
  color: var(--foreground);
}

.sidebar__nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2);
}

.nav-section-header {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  padding: 0 var(--space-4);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-foreground);
  opacity: 0.6;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  color: var(--muted-foreground);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s ease;
  border-right: 2px solid transparent;
}

.nav-item:hover {
  background: var(--muted);
  color: var(--foreground);
  text-decoration: none;
}

.nav-item--active {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  border-right-color: var(--primary);
}

.nav-item svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-item--active svg {
  opacity: 1;
}

.sidebar__footer {
  margin-top: auto;
  padding: var(--space-4);
  border-top: 1px solid var(--border);
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--muted-foreground);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}

.theme-toggle:hover {
  background: var(--muted);
  color: var(--foreground);
}

.sidebar__version {
  margin-top: var(--space-2);
  text-align: center;
  font-size: 0.625rem;
  color: var(--muted-foreground);
  opacity: 0.6;
}

/* ============================================================================
   Main Content
   ============================================================================ */

.main-content {
  margin-left: var(--sidebar-width);
  padding: var(--space-12);
  max-width: 900px;
  transition: margin 0.3s ease;
}

@media (max-width: 1023px) {
  .main-content {
    margin-left: 0;
    padding: var(--space-6);
    padding-top: calc(var(--header-height) + var(--space-6));
  }
}

/* ============================================================================
   Sections
   ============================================================================ */

.section {
  display: none;
  animation: fadeIn 0.3s ease;
}

.section--active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.section__header {
  margin-bottom: var(--space-8);
}

.section__title {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 var(--space-4) 0;
  color: var(--foreground);
}

.section__lead {
  font-size: 1rem;
  color: var(--muted-foreground);
  margin: 0;
  max-width: 600px;
}

.section__desc {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-top: var(--space-4);
  max-width: 600px;
}

/* ============================================================================
   Cards
   ============================================================================ */

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.card--bordered-left {
  border-left-width: 4px;
}

.card--amber { border-left-color: #f59e0b; }
.card--green { border-left-color: #10b981; }
.card--primary { border-left-color: var(--primary); }
.card--purple { border-left-color: #9333ea; }
.card--cyan { border-left-color: #06b6d4; }

.card--dark {
  background: #0f172a;
  border-color: #334155;
}

.card--gradient {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(16, 185, 129, 0.1), rgba(59, 130, 246, 0.1));
}

.card__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.card__icon {
  font-size: 1.25rem;
}

.card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 var(--space-2) 0;
}

.card__desc {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin: 0 0 var(--space-4) 0;
}

.card__link {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
}

.card__hint {
  font-size: 0.75rem;
  color: var(--muted-foreground);
  margin-top: var(--space-4);
}

.cards-grid {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.cards-grid--2col {
  grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 768px) {
  .cards-grid--2col {
    grid-template-columns: 1fr;
  }
}

/* ============================================================================
   Code Blocks
   ============================================================================ */

.code-block {
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  overflow-x: auto;
  margin: 0;
}

[data-theme="dark"] .code-block {
  background: #0f172a;
}

.code-block code {
  background: transparent;
  padding: 0;
}

.code-block--blue code { color: #3b82f6; }
.code-block--green code { color: #10b981; }

.code-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

@media (max-width: 768px) {
  .code-compare {
    grid-template-columns: 1fr;
  }
}

.code-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

.code-badge {
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.code-badge--blue {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

.code-badge--green {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.code-step {
  font-size: 0.875rem;
  font-weight: 500;
  margin: 0 0 var(--space-2) 0;
}

/* ============================================================================
   Component Rows (Button demos)
   ============================================================================ */

.component-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
}

.component-row--destructive {
  background: var(--color-red-50);
  border-color: rgba(185, 28, 28, 0.2);
}

[data-theme="dark"] .component-row--destructive {
  background: rgba(127, 29, 29, 0.2);
}

.component-row__left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.component-row__label {
  font-size: 0.875rem;
}

.component-row__title {
  font-weight: 500;
  color: var(--foreground);
}

.component-row__desc {
  color: var(--muted-foreground);
  margin-left: var(--space-2);
}

.component-demo {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: var(--space-4) 0;
}

/* ============================================================================
   Copy Icon
   ============================================================================ */

.copy-icon {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  padding: var(--space-2);
  color: var(--muted-foreground);
  transition: all 0.15s;
  border-radius: var(--radius-md);
}

.copy-icon:hover {
  color: var(--foreground);
  transform: scale(1.1);
}

/* ============================================================================
   Glass Demo
   ============================================================================ */

.glass-demo {
  position: relative;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #4f46e5, #7c3aed, #db2777);
  overflow: hidden;
  margin-top: var(--space-4);
}

.glass-demo::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
}

.glass-demo > * {
  position: relative;
  z-index: 1;
}

.glass-demo__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: white;
  margin: 0 0 var(--space-4) 0;
}

.glass-demo__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.glass-demo__outline {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  background: transparent;
  border: 2px solid white;
  color: white;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.glass-demo__outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

.glass-demo__note {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
  margin: var(--space-4) 0 0 0;
}

/* ============================================================================
   Prompt Display
   ============================================================================ */

.prompt-display {
  margin: var(--space-6) 0;
  padding: var(--space-4);
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.prompt-display__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.prompt-display__header span {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
}

.prompt-display__actions {
  display: flex;
  gap: var(--space-2);
}

.prompt-display__actions button {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  color: var(--muted-foreground);
  padding: var(--space-1);
}

.prompt-display__actions button:hover {
  color: var(--foreground);
}

.prompt-display__content {
  margin: 0;
  padding: var(--space-3);
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--muted-foreground);
}

/* ============================================================================
   Specs
   ============================================================================ */

.specs {
  background: var(--muted);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin: var(--space-6) 0;
}

.specs__row {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.specs__row:last-child {
  border-bottom: none;
}

.specs__label {
  font-weight: 500;
  color: var(--muted-foreground);
  min-width: 60px;
}

.specs__value {
  color: var(--foreground);
}

/* ============================================================================
   Source Viewer
   ============================================================================ */

.source-viewer {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin: var(--space-6) 0;
}

.source-viewer__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: var(--muted);
  border-bottom: 1px solid var(--border);
}

.source-viewer__title {
  font-size: 0.875rem;
  font-weight: 600;
}

.platform-tabs {
  display: flex;
  gap: var(--space-1);
}

.platform-tab {
  padding: var(--space-1) var(--space-3);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  cursor: pointer;
  color: var(--muted-foreground);
  transition: all 0.15s;
}

.platform-tab:hover {
  background: var(--background);
}

.platform-tab--active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.source-viewer__content {
  padding: var(--space-4);
  max-height: 300px;
  overflow-y: auto;
}

.source-viewer__content pre {
  margin: 0;
  font-size: 0.75rem;
}

.source-viewer__footer {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border);
  background: var(--muted);
}

/* ============================================================================
   Planet Colors Grid
   ============================================================================ */

.planet-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

@media (max-width: 1024px) {
  .planet-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .planet-grid {
    grid-template-columns: 1fr;
  }
}

.planet-box {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
}

.planet-box--yellow { background: #fffbeb; color: #422006; }
.planet-box--red { background: #fef2f2; color: #450a0a; }
.planet-box--green { background: #f0fdf4; color: #052e16; }
.planet-box--pink { background: #fdf2f8; color: #500724; }
.planet-box--orange { background: #fff7ed; color: #431407; }
.planet-box--gray { background: #f1f5f9; color: #0f172a; }

[data-theme="dark"] .planet-box--yellow { background: #422006; color: #fef3c7; }
[data-theme="dark"] .planet-box--red { background: #450a0a; color: #fecaca; }
[data-theme="dark"] .planet-box--green { background: #052e16; color: #bbf7d0; }
[data-theme="dark"] .planet-box--pink { background: #500724; color: #fbcfe8; }
[data-theme="dark"] .planet-box--orange { background: #431407; color: #fed7aa; }
[data-theme="dark"] .planet-box--gray { background: #0f172a; color: #e2e8f0; }

.planet-box__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-2);
}

.planet-box__header h3 {
  margin: 0;
  font-size: 1rem;
}

.planet-box p {
  font-size: 0.875rem;
  margin: 0 0 var(--space-4) 0;
  opacity: 0.9;
}

.planet-box__colors {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  opacity: 0.8;
  margin-bottom: var(--space-4);
}

.planet-box__colors > div {
  display: flex;
  justify-content: space-between;
  padding: var(--space-1) 0;
  border-bottom: 1px solid currentColor;
  opacity: 0.3;
}

.planet-box__colors > div:last-child {
  border-bottom: none;
}

.planet-box__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
}

.a11y-badge {
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  font-weight: 500;
}

.a11y-badge--aaa {
  background: rgba(16, 185, 129, 0.2);
  color: #059669;
}

/* ============================================================================
   Platform Selector
   ============================================================================ */

.platform-selector {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.platform-btn {
  padding: var(--space-2) var(--space-4);
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  cursor: pointer;
  color: var(--muted-foreground);
  transition: all 0.15s;
}

.platform-btn:hover {
  background: var(--background);
  color: var(--foreground);
}

.platform-btn--active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ============================================================================
   Prompt Types
   ============================================================================ */

.prompt-types {
  margin-top: var(--space-6);
}

.prompt-type-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.prompt-type-tab {
  padding: var(--space-2) var(--space-4);
  background: transparent;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  cursor: pointer;
  color: var(--primary);
  transition: all 0.15s;
}

.prompt-type-tab:hover {
  background: rgba(139, 92, 246, 0.1);
}

.prompt-type-tab--active {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--primary);
}

.prompt-card {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.1));
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.prompt-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: rgba(139, 92, 246, 0.1);
  border-bottom: 1px solid rgba(139, 92, 246, 0.2);
}

.prompt-card__header span {
  font-weight: 500;
  color: var(--primary);
}

.prompt-card__content {
  margin: 0;
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  white-space: pre-wrap;
  line-height: 1.8;
  max-height: 400px;
  overflow-y: auto;
}

/* ============================================================================
   Buttons
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s;
  text-decoration: none;
}

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

.btn--primary:hover {
  opacity: 0.9;
}

.btn--small {
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
}

.btn--outline {
  background: transparent;
  border-color: var(--border);
  color: var(--foreground);
}

.btn--outline:hover {
  background: var(--muted);
  text-decoration: none;
}

.btn--cyan {
  background: rgba(6, 182, 212, 0.1);
  color: #0891b2;
}

.btn--cyan:hover {
  background: rgba(6, 182, 212, 0.2);
}

/* ============================================================================
   Tool List
   ============================================================================ */

.tool-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.tool-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-3);
  background: var(--muted);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.tool-item code {
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
}

.tool-item span {
  color: var(--muted-foreground);
}

/* ============================================================================
   Lang Demo
   ============================================================================ */

.lang-demo {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.lang-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
}

.lang-label {
  min-width: 60px;
  color: var(--muted-foreground);
}

.data-badge {
  background: var(--muted);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.font-devanagari {
  font-family: 'Hind', sans-serif;
}

.font-mono {
  font-family: var(--font-mono);
}