/* Modern Style Guide - GitHub Project Health Dashboard */

:root {
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Typography */
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;
  --text-4xl: 36px;

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

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* Light Theme (Default) */
.theme-light {
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F9FAFB;
  --color-bg-tertiary: #F3F4F6;
  --color-surface-primary: #FFFFFF;
  --color-surface-secondary: #F9FAFB;
  --color-surface-elevated: #FFFFFF;
  --color-text-primary: #111827;
  --color-text-secondary: #4B5563;
  --color-text-tertiary: #9CA3AF;
  --color-text-inverse: #FFFFFF;
  --color-border-default: #E5E7EB;
  --color-border-subtle: #F3F4F6;
  --color-border-strong: #D1D5DB;
  --color-accent: #6366F1;
  --color-accent-hover: #4F46E5;
  --color-accent-subtle: #E0E7FF;
  --color-accent-muted: #A5B4FC;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --focus-ring: rgba(99, 102, 241, 0.4);
  --overlay: rgba(0, 0, 0, 0.5);
}

/* Dark Theme */
.theme-dark {
  --color-bg-primary: #0A0A0B;
  --color-bg-secondary: #141417;
  --color-bg-tertiary: #1C1C21;
  --color-surface-primary: #141417;
  --color-surface-secondary: #1C1C21;
  --color-surface-elevated: #222228;
  --color-text-primary: #F9FAFB;
  --color-text-secondary: #9CA3AF;
  --color-text-tertiary: #6B7280;
  --color-text-inverse: #111827;
  --color-border-default: #2D2D35;
  --color-border-subtle: #222228;
  --color-border-strong: #3D3D47;
  --color-accent: #818CF8;
  --color-accent-hover: #A5B4FC;
  --color-accent-subtle: #312E81;
  --color-accent-muted: #6366F1;
  --color-success: #34D399;
  --color-warning: #FBBF24;
  --color-error: #F87171;
  --color-info: #60A5FA;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --focus-ring: rgba(129, 140, 248, 0.4);
  --overlay: rgba(0, 0, 0, 0.7);
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg);
}

/* Header */
.header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 800px;
  margin: 0 auto var(--space-md);
}

.title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-bold);
  margin: 0;
}

.title-icon {
  width: 32px;
  height: 32px;
  color: var(--color-accent);
}

.header-actions {
  display: flex;
  gap: var(--space-sm);
}

.subtitle {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  margin: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
}

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

.btn-secondary {
  background-color: var(--color-surface-secondary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
}

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

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-sm);
}

.btn-ghost:hover {
  background-color: var(--color-surface-secondary);
  color: var(--color-text-primary);
}

.theme-toggle {
  min-width: 60px;
}

/* Stats Bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--color-surface-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
}

.stat {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Repo Grid */
.repo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-lg);
}

/* Repo Card */
.repo-card {
  background: var(--color-surface-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.repo-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
}

.repo-name {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  margin: 0;
}

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

.repo-name a:hover {
  color: var(--color-accent);
}

.repo-status {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
}

.repo-status.active {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
}

.repo-status.stale {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.repo-status.inactive {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

.repo-description {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin: 0 0 var(--space-md);
  line-height: var(--line-height-relaxed);
}

.repo-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-subtle);
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.detail-label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.detail-value {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
}

.detail-value.mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.commit-message {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pr-count {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.pr-count svg {
  color: var(--color-success);
}

/* Loading */
.loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-secondary);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border-default);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--space-md);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Error */
.error-card {
  grid-column: 1 / -1;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-error);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  color: var(--color-error);
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

/* Responsive */
@media (max-width: 768px) {
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .repo-grid {
    grid-template-columns: 1fr;
  }
  
  .header-content {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .title {
    font-size: var(--text-2xl);
  }
}