/* 
  Civic Discourse Collective - Minimalist Stylesheet 
  Premium, grayscale aesthetic. Mobile-first responsive design.
*/

:root {
  /* Design Tokens */
  --color-bg: #f9f9f9;
  --color-surface: #ffffff;
  --color-text-primary: #111111;
  --color-text-secondary: #555555;
  --color-text-tertiary: #888888;
  --color-border: #e0e0e0;
  --color-border-hover: #aaaaaa;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  
  --max-width: 960px; /* Increased for desktop */
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--spacing-md) 0 var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-md);
  background-color: var(--color-surface);
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.site-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-xs);
  white-space: nowrap;
}

.site-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.main-nav {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-text-primary);
  border-bottom: 2px solid var(--color-text-primary);
}

/* Main Content */
.main-content {
  padding-bottom: var(--spacing-xl);
}

.page-title {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.content-section {
  background-color: var(--color-surface);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-bottom: var(--spacing-md);
  max-width: 800px; /* Constrain reading width for about section */
}

.content-section p {
  margin-bottom: var(--spacing-sm);
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.content-section p:last-child {
  margin-bottom: 0;
}

/* Articles List */
.article-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.article-card {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  height: 100%;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.05);
  border-color: var(--color-border-hover);
}

.article-meta {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-sm);
  display: flex;
  gap: 12px;
  align-items: center;
}

.article-category {
  background-color: #f0f0f0;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
}

.article-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.article-excerpt {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  flex-grow: 1; /* Pushes the read more button to the bottom */
  line-height: 1.6;
}

.read-more {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}

.read-more::after {
  content: '→';
  margin-left: 6px;
  transition: transform 0.2s ease;
}

.article-card:hover .read-more {
  border-bottom-color: var(--color-text-primary);
}

.article-card:hover .read-more::after {
  transform: translateX(4px);
}

/* Footer */
.site-footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-tertiary);
  font-size: 0.9rem;
  background-color: var(--color-surface);
}

/* Utilities */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  color: var(--color-text-tertiary);
  background-color: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

/* Responsive Styles */
@media (min-width: 768px) {
  .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
  
  .header-text {
    flex: 1;
  }
  
  .main-nav {
    flex-shrink: 0;
    margin-bottom: var(--spacing-xs);
  }
  
  .article-list {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
}

@media (max-width: 600px) {
  :root {
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
  }
  
  .site-title {
    font-size: 1.2rem;
  }
  
  .site-subtitle {
    display: none; /* Hide subtitle on mobile to save vertical space */
  }
  
  .site-header {
    padding: 10px 0 5px; /* Minimal padding */
    margin-bottom: var(--spacing-sm);
  }
  
  .header-inner {
    gap: 8px; /* Tighter spacing between title and nav */
  }
  
  .main-nav {
    gap: 4px 10px;
    justify-content: space-between;
  }
  
  .main-nav a {
    font-size: 0.75rem; /* Smaller font for tabs */
    padding-bottom: 2px;
  }
  
  .article-title {
    font-size: 1.25rem;
  }
  
  .article-card {
    padding: var(--spacing-md);
  }
}