:root {
  /* Google Material Design 3 Color System */
  --gd-primary: #1a73e8;
  --gd-primary-container: #e8f0fe;
  --gd-secondary: #5f6368;
  --gd-secondary-container: #f1f3f4;
  --gd-tertiary: #e8eaed;
  --gd-surface: #ffffff;
  --gd-surface-variant: #f8f9fa;
  --gd-background: #ffffff;
  --gd-on-primary: #ffffff;
  --gd-on-primary-container: #1a73e8;
  --gd-on-secondary: #202124;
  --gd-on-secondary-container: #5f6368;
  --gd-on-surface: #202124;
  --gd-on-surface-variant: #5f6368;
  --gd-outline: #dadce0;
  --gd-outline-variant: #e8eaed;
  --gd-shadow: rgba(60, 64, 67, 0.3);
  --gd-shadow-ambient: rgba(60, 64, 67, 0.15);
  
  /* Typography - Google Sans & Roboto */
  --gd-font-family: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --gd-font-mono: 'Roboto Mono', 'SF Mono', Monaco, Consolas, monospace;
  
  /* Type Scale */
  --gd-display-large: 3.5rem;
  --gd-display-medium: 2.8125rem;
  --gd-display-small: 2.25rem;
  --gd-headline-large: 2rem;
  --gd-headline-medium: 1.75rem;
  --gd-headline-small: 1.5rem;
  --gd-title-large: 1.375rem;
  --gd-title-medium: 1rem;
  --gd-title-small: 0.875rem;
  --gd-body-large: 1rem;
  --gd-body-medium: 0.875rem;
  --gd-body-small: 0.75rem;
  --gd-label-large: 0.875rem;
  --gd-label-medium: 0.75rem;
  --gd-label-small: 0.6875rem;
  
  /* Spacing */
  --gd-spacing-xs: 0.25rem;
  --gd-spacing-sm: 0.5rem;
  --gd-spacing-md: 1rem;
  --gd-spacing-lg: 1.5rem;
  --gd-spacing-xl: 2rem;
  --gd-spacing-xxl: 3rem;
  
  /* Border Radius */
  --gd-radius-sm: 0.25rem;
  --gd-radius-md: 0.5rem;
  --gd-radius-lg: 1rem;
  --gd-radius-xl: 1.5rem;
  --gd-radius-full: 9999px;
  
  /* Transitions */
  --gd-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --gd-transition-medium: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --gd-transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Shadows */
  --gd-shadow-1: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --gd-shadow-2: 0 1px 3px 0 rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
  --gd-shadow-3: 0 2px 6px 2px rgba(60, 64, 67, 0.3), 0 1px 2px 0 rgba(60, 64, 67, 0.15);
  --gd-shadow-4: 0 4px 8px 3px rgba(60, 64, 67, 0.3), 0 1px 3px 0 rgba(60, 64, 67, 0.15);
  
  /* Apple-style variables for light mode */
  --apple-blue-300: #9fb7df;
  --apple-blue-400: #7ea0c4;
  --apple-blue-500: #5f7fa3;
  --apple-blue-600: #4d6b8c;
  
  /* Accent additions */
  --apple-green-400: #6fbf73;
  --apple-red-400: #e16a5f;
  
  /* Glass morphism variables for light mode */
  --glass-background: rgba(255, 255, 255, 0.8);
  --glass-background-subtle: rgba(248, 249, 250, 0.9);
  --glass-border: rgba(218, 220, 224, 0.6);
  --glass-border-strong: rgba(189, 193, 198, 0.8);
  --glass-shadow: rgba(60, 64, 67, 0.15);
  --glass-shadow-strong: rgba(60, 64, 67, 0.3);
  
  /* Color system */
  --color-foreground: #202124;
  --color-foreground-subtle: #5f6368;
  --color-foreground-muted: #9aa0a6;
  --stone-900: #0c0a09;
}

/* Dark mode variables */
[data-theme="dark"] {
  --gd-primary: #8ab4f8;
  --gd-primary-container: #1e3a8a;
  --gd-secondary: #9aa0a6;
  --gd-secondary-container: #3c4043;
  --gd-tertiary: #5f6368;
  --gd-surface: #202124;
  --gd-surface-variant: #3c4043;
  --gd-background: #202124;
  --gd-on-primary: #202124;
  --gd-on-primary-container: #8ab4f8;
  --gd-on-secondary: #e8eaed;
  --gd-on-secondary-container: #9aa0a6;
  --gd-on-surface: #e8eaed;
  --gd-on-surface-variant: #9aa0a6;
  --gd-outline: #5f6368;
  --gd-outline-variant: #3c4043;
  --gd-shadow: rgba(0, 0, 0, 0.3);
  --gd-shadow-ambient: rgba(0, 0, 0, 0.15);
  
  /* Apple-style variables for dark mode */
  --apple-blue-300: #8fb3d9;
  --apple-blue-400: #7aa6c2;
  --apple-blue-500: #5f8ea9;
  --apple-blue-600: #4b738a;
  
  /* Accent additions */
  --apple-green-400: #58b467;
  --apple-red-400: #d45b50;
  
  /* Glass morphism variables for dark mode */
  --glass-background: rgba(30, 30, 35, 0.8);
  --glass-background-subtle: rgba(25, 25, 30, 0.9);
  --glass-border: rgba(60, 60, 70, 0.4);
  --glass-border-strong: rgba(80, 80, 90, 0.6);
  --glass-shadow: rgba(0, 0, 0, 0.2);
  --glass-shadow-strong: rgba(0, 0, 0, 0.4);
  
  /* Color system */
  --color-foreground: #e8eaed;
  --color-foreground-subtle: #9aa0a6;
  --color-foreground-muted: #5f6368;
  --stone-900: #0c0a09;
}

/* Font imports */
@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;700&family=Roboto:wght@300;400;500;700&family=Roboto+Mono:wght@400;500&display=swap');

/* Base styles */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--gd-font-family);
  font-size: var(--gd-body-large);
  line-height: 1.5;
  color: var(--gd-on-surface);
  background-color: var(--gd-background);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Google-style container refinements */
.google-style-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--gd-spacing-xl);
  background-color: var(--gd-background);
  transition: all var(--gd-transition-medium);
}

.google-style-container.active {
  justify-content: flex-start;
  padding-top: var(--gd-spacing-xxl);
}

/* Logo refinements */
.logo-section {
  text-align: center;
  margin-bottom: var(--gd-spacing-xxl);
  transition: all var(--gd-transition-medium);
}

.logo-section.compact {
  margin-bottom: var(--gd-spacing-lg);
  transform: scale(0.9);
}

.google-logo {
  font-family: 'Google Sans', sans-serif;
  font-size: var(--gd-display-small);
  font-weight: 700;
  color: var(--gd-on-surface);
  margin-bottom: var(--gd-spacing-sm);
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--gd-primary), #4285f4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.google-tagline {
  font-size: var(--gd-body-large);
  color: var(--gd-on-surface-variant);
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* Search container refinements */
.search-container {
  width: 100%;
  max-width: 584px;
  position: relative;
  transition: all var(--gd-transition-medium);
}

.search-container.expanded {
  max-width: 720px;
}

/* Search box refinements */
.google-search-box {
  position: relative;
  background: var(--gd-surface);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-xl);
  padding: var(--gd-spacing-md);
  transition: all var(--gd-transition-medium);
  box-shadow: var(--gd-shadow-1);
}

.google-search-box:hover {
  box-shadow: var(--gd-shadow-2);
  border-color: var(--gd-outline-variant);
}

.google-search-box:focus-within {
  border-color: var(--gd-primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1), var(--gd-shadow-2);
}

/* Search input refinements */
.google-search-input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  font-size: var(--gd-body-large);
  color: var(--gd-on-surface);
  padding: var(--gd-spacing-sm) var(--gd-spacing-md);
  font-family: var(--gd-font-family);
  transition: all var(--gd-transition-fast);
}

.google-search-input::placeholder {
  color: var(--gd-on-surface-variant);
  opacity: 0.8;
}

/* Search buttons refinements */
.search-buttons {
  display: flex;
  gap: var(--gd-spacing-md);
  justify-content: center;
  margin-top: var(--gd-spacing-lg);
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--gd-transition-medium);
}

.search-buttons.visible {
  opacity: 1;
  transform: translateY(0);
}

.google-search-btn {
  padding: var(--gd-spacing-sm) var(--gd-spacing-lg);
  background: var(--gd-surface-variant);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-md);
  color: var(--gd-on-surface);
  font-size: var(--gd-label-large);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--gd-transition-fast);
  position: relative;
  overflow: hidden;
}

.google-search-btn:hover {
  background: var(--gd-secondary-container);
  border-color: var(--gd-outline-variant);
  box-shadow: var(--gd-shadow-1);
  transform: translateY(-1px);
}

.google-search-btn.primary {
  background: var(--gd-primary);
  color: var(--gd-on-primary);
  border-color: var(--gd-primary);
  font-weight: 500;
}

.google-search-btn.primary:hover {
  background: #1557b0;
  border-color: #1557b0;
  box-shadow: 0 4px 8px rgba(26, 115, 232, 0.3);
  transform: translateY(-2px);
}

/* Ripple effect */
.google-search-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.google-search-btn:active::before {
  width: 300px;
  height: 300px;
}

/* Filters panel refinements */
.filters-panel {
  max-height: 0;
  overflow: hidden;
  transition: all var(--gd-transition-medium);
  margin-top: var(--gd-spacing-md);
}

.filters-panel.expanded {
  max-height: 400px;
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--gd-spacing-md);
  padding: var(--gd-spacing-md);
  background: var(--gd-surface-variant);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-lg);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--gd-spacing-xs);
}

.filter-label {
  font-size: var(--gd-label-medium);
  font-weight: 500;
  color: var(--gd-on-surface);
  margin-bottom: var(--gd-spacing-xs);
}

.filter-select {
  padding: var(--gd-spacing-sm);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-sm);
  background: var(--gd-surface);
  color: var(--gd-on-surface);
  font-size: var(--gd-body-medium);
  font-family: var(--gd-font-family);
  transition: all var(--gd-transition-fast);
}

.filter-select:focus {
  outline: none;
  border-color: var(--gd-primary);
  box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

/* Progress section refinements */
.progress-section {
  max-width: 720px;
  width: 100%;
  margin: var(--gd-spacing-xl) auto 0;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--gd-transition-medium);
}

.progress-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.progress-card {
  background: var(--gd-surface);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-lg);
  padding: var(--gd-spacing-lg);
  box-shadow: var(--gd-shadow-1);
}

.progress-bar-container {
  width: 100%;
  height: 8px;
  background: var(--gd-surface-variant);
  border-radius: var(--gd-radius-full);
  overflow: hidden;
  margin: var(--gd-spacing-sm) 0;
}

.progress-bar {
  height: 100%;
  background: var(--gd-primary);
  border-radius: var(--gd-radius-full);
  transition: width var(--gd-transition-medium);
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Quick settings refinements */
.quick-settings {
  position: absolute;
  right: var(--gd-spacing-sm);
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: var(--gd-spacing-xs);
}

.quick-setting-btn {
  background: transparent;
  border: none;
  color: var(--gd-on-surface-variant);
  cursor: pointer;
  padding: var(--gd-spacing-xs);
  border-radius: var(--gd-radius-sm);
  transition: all var(--gd-transition-fast);
  font-size: 1.2rem;
}

.quick-setting-btn:hover {
  background: var(--gd-surface-variant);
  color: var(--gd-on-surface);
}

/* Header bar refinements */
.header-bar {
  position: fixed;
  top: var(--gd-spacing-md);
  right: var(--gd-spacing-md);
  display: flex;
  gap: var(--gd-spacing-sm);
  z-index: 100;
}

.theme-toggle-btn {
  padding: var(--gd-spacing-sm);
  background: var(--gd-surface);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-full);
  cursor: pointer;
  transition: all var(--gd-transition-fast);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--gd-shadow-1);
}

.theme-toggle-btn:hover {
  background: var(--gd-surface-variant);
  box-shadow: var(--gd-shadow-2);
  transform: translateY(-1px);
}

/* Loading animations */
.loading-dots {
  display: inline-block;
}

.loading-dots::after {
  content: '';
  animation: dots 1.5s steps(5, end) infinite;
}

@keyframes dots {
  0%, 20% {
    content: '';
  }
  40% {
    content: '.';
  }
  60% {
    content: '..';
  }
  80%, 100% {
    content: '...';
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease-out forwards;
}

.fade-in-delay-1 {
  animation-delay: 0.2s;
}

.fade-in-delay-2 {
  animation-delay: 0.4s;
}

.fade-in-delay-3 {
  animation-delay: 0.6s;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .google-style-container {
    padding: var(--gd-spacing-md);
  }
  
  .google-logo {
    font-size: var(--gd-display-small);
  }
  
  .search-container {
    max-width: 100%;
  }
  
  .filters-grid {
    grid-template-columns: 1fr;
  }
  
  .search-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .google-search-btn {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .google-logo {
    font-size: var(--gd-headline-large);
  }
  
  .google-tagline {
    font-size: var(--gd-body-medium);
  }
  
  .google-search-input {
    font-size: var(--gd-body-medium);
  }
}

/* Branch input styles */
.branch-container {
  margin-top: var(--gd-spacing-md);
  max-height: 400px;
  overflow-y: auto;
  background: var(--glass-background);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--gd-radius-lg);
  padding: var(--gd-spacing-lg);
  transition: all var(--gd-transition-medium);
}

.branch-item {
  margin-bottom: var(--gd-spacing-md);
  padding: var(--gd-spacing-md);
  background: var(--glass-background-subtle);
  border-radius: var(--gd-radius-md);
  border: 1px solid var(--glass-border);
  transition: all var(--gd-transition-fast);
}

.branch-item:hover {
  transform: translateY(-1px);
  border-color: var(--apple-blue-400);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.1);
}

.branch-title, .branch-description {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-foreground);
  font-family: inherit;
  resize: vertical;
}

.branch-title {
  font-weight: 600;
  font-size: var(--gd-body-large);
  margin-bottom: var(--gd-spacing-xs);
  padding: var(--gd-spacing-xs);
}

.branch-description {
  font-size: var(--gd-body-medium);
  color: var(--color-foreground-subtle);
  padding: var(--gd-spacing-xs);
  min-height: 3rem;
}

.branch-title:focus, .branch-description:focus {
  background: rgba(56, 189, 248, 0.1);
  border-radius: var(--gd-radius-sm);
}

/* Apple glow effect */
.apple-glow {
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.3);
}

.hover-lift:hover {
  transform: translateY(-2px);
}

/* Research stages indicator styles */
.research-stage-indicators {
  position: fixed;
  bottom: var(--gd-spacing-md);
  right: var(--gd-spacing-md);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--gd-spacing-sm);
  max-width: 300px;
}

/* Utility Classes */
.hidden {
  display: none !important;
}

.container {
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--gd-spacing-md);
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* Card Components */
.card {
  background: var(--gd-surface);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-lg);
  box-shadow: var(--gd-shadow-1);
  overflow: hidden;
}

.card-header {
  padding: var(--gd-spacing-lg);
  border-bottom: 1px solid var(--gd-outline);
}

.card-body {
  padding: var(--gd-spacing-lg);
}

.card-title {
  font-size: var(--gd-headline-small);
  font-weight: 500;
  color: var(--gd-on-surface);
  margin: 0;
}

.card-subtitle {
  font-size: var(--gd-body-medium);
  color: var(--gd-on-surface-variant);
  margin-top: var(--gd-spacing-xs);
}

/* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--gd-spacing-sm) var(--gd-spacing-lg);
  background: var(--gd-surface-variant);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-md);
  color: var(--gd-on-surface);
  font-size: var(--gd-label-large);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--gd-transition-fast);
  text-decoration: none;
  gap: var(--gd-spacing-xs);
}

.btn:hover {
  background: var(--gd-secondary-container);
  border-color: var(--gd-outline-variant);
  box-shadow: var(--gd-shadow-1);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--gd-primary);
  color: var(--gd-on-primary);
  border-color: var(--gd-primary);
}

.btn-primary:hover {
  background: var(--apple-blue-600);
  border-color: var(--apple-blue-600);
}

.btn-secondary {
  background: transparent;
  color: var(--gd-primary);
  border-color: var(--gd-primary);
}

.btn-secondary:hover {
  background: var(--gd-primary-container);
}

.btn-ghost {
  background: transparent;
  border: none;
  color: var(--gd-on-surface-variant);
}

.btn-ghost:hover {
  background: var(--gd-surface-variant);
}

.btn-danger {
  background: #dc2626;
  color: white;
  border-color: #dc2626;
}

.btn-danger:hover {
  background: #b91c1c;
  border-color: #b91c1c;
}

.btn-sm {
  padding: var(--gd-spacing-xs) var(--gd-spacing-sm);
  font-size: var(--gd-label-medium);
}

.btn-lg {
  padding: var(--gd-spacing-md) var(--gd-spacing-xl);
  font-size: var(--gd-body-large);
}

/* Form Elements */
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--gd-spacing-sm) var(--gd-spacing-md);
  background: var(--gd-surface);
  border: 1px solid var(--gd-outline);
  border-radius: var(--gd-radius-sm);
  color: var(--gd-on-surface);
  font-size: var(--gd-body-medium);
  font-family: var(--gd-font-family);
  transition: all var(--gd-transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--gd-primary);
  box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* Grid System */
.grid {
  display: grid;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

@media (min-width: 1024px) {
  .lg\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .xl\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.gap-2 { gap: var(--gd-spacing-sm); }
.gap-3 { gap: var(--gd-spacing-md); }
.gap-4 { gap: var(--gd-spacing-md); }
.gap-6 { gap: var(--gd-spacing-lg); }

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1 1 0%; }

/* Spacing Utilities */
.p-0 { padding: 0; }
.p-4 { padding: var(--gd-spacing-md); }
.p-6 { padding: var(--gd-spacing-lg); }
.p-8 { padding: var(--gd-spacing-xl); }

.px-3 { padding-left: var(--gd-spacing-md); padding-right: var(--gd-spacing-md); }
.py-1 { padding-top: var(--gd-spacing-xs); padding-bottom: var(--gd-spacing-xs); }

.m-0 { margin: 0; }
.m-1 { margin: var(--gd-spacing-xs); }
.m-4 { margin: var(--gd-spacing-md); }

.mt-2 { margin-top: var(--gd-spacing-sm); }
.mt-4 { margin-top: var(--gd-spacing-md); }
.mt-8 { margin-top: var(--gd-spacing-xl); }
.mb-1 { margin-bottom: var(--gd-spacing-xs); }
.mb-2 { margin-bottom: var(--gd-spacing-sm); }
.mb-4 { margin-bottom: var(--gd-spacing-md); }
.mb-6 { margin-bottom: var(--gd-spacing-lg); }
.mr-2 { margin-right: var(--gd-spacing-sm); }
.ml-2 { margin-left: var(--gd-spacing-sm); }

.space-y-1 > * + * { margin-top: var(--gd-spacing-xs); }
.space-y-2 > * + * { margin-top: var(--gd-spacing-sm); }
.space-y-4 > * + * { margin-top: var(--gd-spacing-md); }

/* Text Utilities */
.text-sm { font-size: var(--gd-body-small); }
.text-base { font-size: var(--gd-body-large); }
.text-lg { font-size: var(--gd-title-large); }
.text-xl { font-size: var(--gd-headline-small); }
.text-2xl { font-size: var(--gd-headline-medium); }
.text-3xl { font-size: var(--gd-headline-large); }
.text-heading-3 { font-size: var(--gd-headline-medium); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-error { color: #dc2626; }
.text-success { color: #16a34a; }
.text-warning { color: #f59e0b; }
.text-foreground-subtle { color: var(--gd-on-surface-variant); }
.text-foreground-muted { color: var(--color-foreground-muted); }

/* Background Utilities */
.bg-transparent { background-color: transparent; }
.bg-surface { background-color: var(--gd-surface); }
.bg-surface-variant { background-color: var(--gd-surface-variant); }
.bg-primary { background-color: var(--gd-primary); }
.bg-ridge-50 { background-color: var(--gd-surface-variant); }
.bg-black { background-color: #000000; }
.bg-opacity-50 { background-color: rgba(0, 0, 0, 0.5); }
.bg-stone-200 { background-color: #e7e5e4; }

/* Border Utilities */
.border { border-width: 1px; }
.border-0 { border-width: 0; }
.border-2 { border-width: 2px; }
.border-b { border-bottom-width: 1px; }
.border-color-border { border-color: var(--gd-outline); }
.border-alpenglow { border-color: var(--apple-blue-400); }
.rounded { border-radius: var(--gd-radius-sm); }
.rounded-md { border-radius: var(--gd-radius-md); }
.rounded-lg { border-radius: var(--gd-radius-lg); }
.rounded-xl { border-radius: var(--gd-radius-xl); }
.rounded-full { border-radius: var(--gd-radius-full); }

/* Size Utilities */
.w-full { width: 100%; }
.h-full { height: 100%; }
.h-2 { height: 0.5rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-4xl { max-width: 56rem; }
.max-h-80vh { max-height: 80vh; }

/* Position Utilities */
.fixed { position: fixed; }
.absolute { position: absolute; }
.relative { position: relative; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }

/* Z-Index Utilities */
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-50 { z-index: 50; }
.z-100 { z-index: 100; }

/* Overflow Utilities */
.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }
.overflow-y-auto { overflow-y: auto; }
.overflow-x-auto { overflow-x: auto; }

/* Transition Utilities */
.transition-all { transition-property: all; transition-timing-function: var(--gd-transition-medium); }
.duration-300 { transition-duration: 300ms; }

/* Alpine texture class */
.alpine-texture {
  background-image: linear-gradient(135deg, rgba(255,255,255,0.03) 0%, transparent 100%);
}

/* Monospace text */
.text-mono-sm {
  font-family: var(--gd-font-mono);
  font-size: var(--gd-body-small);
}

/* List styles */
.list-disc {
  list-style-type: disc;
}

.list-inside {
  list-style-position: inside;
}

/* Responsive visibility */
@media (max-width: 1023px) {
  .lg\:flex-row {
    flex-direction: column;
  }
}

@media (min-width: 1024px) {
  .lg\:flex-row {
    flex-direction: row;
  }
}