/* ============================================
   BSCA Website 2026 - Modern Static Site
   ============================================ */

/* CSS Variables for easy theming */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-secondary: #10b981;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-bg: #ffffff;
  --color-bg-alt: #f9fafb;
  --color-border: #e5e7eb;
  --color-code-bg: #f3f4f6;
  
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
  
  --max-width: 800px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: var(--spacing-xl) var(--spacing-md);
  box-shadow: var(--shadow-lg);
}

.site-header .container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  letter-spacing: -0.025em;
}

.site-description {
  font-size: 1.125rem;
  opacity: 0.95;
  font-weight: 400;
}

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

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

main {
  padding: var(--spacing-xl) 0;
}

/* Loading State */
.loading {
  text-align: center;
  padding: var(--spacing-xxl) 0;
  color: var(--color-text-light);
  font-size: 1.125rem;
}

.loading::after {
  content: '...';
  animation: dots 1.5s steps(3, end) infinite;
}

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

/* Error State */
.error {
  background-color: #fee2e2;
  border: 1px solid #fecaca;
  border-radius: 8px;
  padding: var(--spacing-md);
  color: #991b1b;
  margin: var(--spacing-lg) 0;
}

/* ============================================
   Article Styles
   ============================================ */

.article {
  background-color: var(--color-bg);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text-light);
  font-size: 0.875rem;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.article-meta-item::before {
  content: '•';
  color: var(--color-primary);
  font-weight: bold;
}

.article-meta-item:first-child::before {
  content: '';
}

.article-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.article-description {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

/* ============================================
   Featured Image (Hero)
   ============================================ */

.article-featured-image {
  width: calc(100% + var(--spacing-xl) * 2);
  margin: var(--spacing-xl) calc(-1 * var(--spacing-xl)) 0;
  overflow: hidden;
  border-radius: 8px;
  aspect-ratio: 16 / 9;
  background: linear-gradient(
    90deg,
    var(--color-bg-alt) 25%,
    #e5e7eb 50%,
    var(--color-bg-alt) 75%
  );
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

.article-featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.3s ease;
  animation: none;
  background: transparent;
}

.article-featured-image:hover img {
  transform: scale(1.02);
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.article-content {
  font-size: 1.125rem;
  line-height: 1.8;
}

/* ============================================
   Typography in Article Content
   ============================================ */

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.3;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.025em;
}

.article-content h1 { font-size: 2.25rem; }
.article-content h2 { font-size: 1.875rem; }
.article-content h3 { font-size: 1.5rem; }
.article-content h4 { font-size: 1.25rem; }
.article-content h5 { font-size: 1.125rem; }
.article-content h6 { font-size: 1rem; }

.article-content p {
  margin-bottom: var(--spacing-md);
}

.article-content a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.article-content a:hover {
  border-bottom-color: var(--color-primary);
}

.article-content strong {
  font-weight: 600;
  color: var(--color-text);
}

.article-content em {
  font-style: italic;
}

/* Lists */
.article-content ul,
.article-content ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.article-content li {
  margin-bottom: var(--spacing-xs);
}

.article-content li > ul,
.article-content li > ol {
  margin-top: var(--spacing-xs);
  margin-bottom: 0;
}

/* Code */
.article-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-code-bg);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  color: var(--color-text);
}

.article-content pre {
  background-color: var(--color-text);
  color: #f9fafb;
  padding: var(--spacing-md);
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.article-content pre code {
  background-color: transparent;
  padding: 0;
  color: inherit;
  font-size: 0.875rem;
}

/* Blockquotes */
.article-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  color: var(--color-text-light);
  font-style: italic;
}

/* Horizontal Rule */
.article-content hr {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: var(--spacing-xl) 0;
}

/* Images */
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-md);
  display: block;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.article-content img:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -5px rgba(0, 0, 0, 0.15);
}

/* Image loading state */
.article-content img[loading="lazy"] {
  background-color: var(--color-bg-alt);
  min-height: 200px;
}

/* Figure and Figcaption for Images with Captions */
.article-content figure {
  margin: var(--spacing-xl) 0;
  text-align: center;
  background-color: var(--color-bg);
  border-radius: 12px;
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.article-content figure img {
  margin-bottom: var(--spacing-sm);
  margin-left: auto;
  margin-right: auto;
  box-shadow: var(--shadow-md);
}

.article-content figure:hover img {
  transform: none;
  box-shadow: var(--shadow-md);
}

.article-content figcaption {
  color: var(--color-text-light);
  font-size: 0.875rem;
  font-style: italic;
  line-height: 1.5;
  padding: 0 var(--spacing-md);
  margin-top: var(--spacing-sm);
}

/* Tables */
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  overflow-x: auto;
  display: block;
}

.article-content th,
.article-content td {
  padding: var(--spacing-sm);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.article-content th {
  background-color: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-text);
}

.article-content tr:hover {
  background-color: var(--color-bg-alt);
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xxl);
  text-align: center;
  color: var(--color-text-light);
}

.site-footer a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
  }
  
  .site-header {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .site-title {
    font-size: 1.5rem;
  }
  
  .site-description {
    font-size: 1rem;
  }
  
  .article {
    padding: var(--spacing-md);
    border-radius: 8px;
  }
  
  .article-title {
    font-size: 1.875rem;
  }
  
  .article-description {
    font-size: 1.125rem;
  }
  
  /* Featured image responsive */
  .article-featured-image {
    width: calc(100% + var(--spacing-md) * 2);
    margin: var(--spacing-md) calc(-1 * var(--spacing-md)) 0;
    aspect-ratio: 4 / 3;
  }
  
  .article-content {
    font-size: 1rem;
  }
  
  .article-content h1 { font-size: 1.75rem; }
  .article-content h2 { font-size: 1.5rem; }
  .article-content h3 { font-size: 1.25rem; }
  .article-content h4 { font-size: 1.125rem; }
  
  .article-content pre {
    padding: var(--spacing-sm);
    font-size: 0.875rem;
  }
  
  .article-content figure {
    padding: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .container {
    padding: var(--spacing-sm);
  }
  
  .article-meta {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .site-header,
  .site-footer {
    display: none;
  }
  
  .article {
    box-shadow: none;
    border: 1px solid var(--color-border);
  }
  
  .article-content a {
    color: var(--color-text);
    text-decoration: underline;
  }
  
  .article-content pre {
    border: 1px solid var(--color-border);
  }
}