/* Thomas Blood Theme - Main Stylesheet */

/* ============================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ============================================ */

:root {
  /* Color Palette */
  --color-charcoal: #2c3440;
  --color-off-white: #f5f1e8;
  --color-copper: #b87860;
  --color-copper-light: #c89880;
  --color-verdigris: #4a9b8e;
  --color-gray-light: #9ca3af;
  --color-gray-medium: #6b7280;
  
  /* Typography */
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  
  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Layout */
  --max-width-prose: 65ch;
  --max-width-wide: 1200px;
  --max-width-full: 1400px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-charcoal);
  background-color: var(--color-off-white);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.01em;
  margin-bottom: var(--space-md);
  color: var(--color-charcoal);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-sm);
}

h2 {
  font-size: 2rem;
  margin-top: var(--space-xl);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--space-lg);
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
  font-weight: 600;
}

p {
  margin-bottom: var(--space-md);
}

a {
  color: var(--color-copper);
  text-decoration: none;
  transition: color var(--transition-fast);
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--color-copper-light);
  border-bottom-color: var(--color-copper-light);
}

a:focus {
  outline: 2px solid var(--color-copper);
  outline-offset: 2px;
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

blockquote {
  margin: var(--space-lg) 0;
  padding-left: var(--space-lg);
  border-left: 3px solid var(--color-copper);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  color: var(--color-gray-medium);
  font-style: italic;
}

code {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
  font-size: 0.9em;
  background: rgba(44, 52, 64, 0.05);
  padding: 0.2em 0.4em;
  border-radius: 3px;
}

pre {
  margin: var(--space-lg) 0;
  padding: var(--space-md);
  background: var(--color-charcoal);
  color: var(--color-off-white);
  border-radius: 6px;
  overflow-x: auto;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

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

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

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid rgba(44, 52, 64, 0.1);
  background: var(--color-off-white);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  border-bottom: none;
}

.site-logo:hover {
  border-bottom: none;
}

.logo-mark {
  width: 40px;
  height: auto;
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-charcoal);
  margin: 0;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-charcoal);
  transition: color var(--transition-fast);
  border-bottom: 2px solid transparent;
  padding-bottom: 0.25rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-copper);
  border-bottom-color: var(--color-copper);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-charcoal);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-off-white);
    flex-direction: column;
    padding: var(--space-md);
    border-top: 1px solid rgba(44, 52, 64, 0.1);
    gap: var(--space-sm);
  }
  
  .site-nav.is-active {
    display: flex;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  padding: var(--space-3xl) 0;
  text-align: center;
}

.hero-title {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  font-weight: 400;
}

.hero-subtitle {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  color: var(--color-gray-medium);
  max-width: 60ch;
  margin: 0 auto var(--space-xl);
  line-height: 1.6;
}

.hero-cta {
  display: inline-block;
  padding: 0.875rem 2rem;
  background: var(--color-copper);
  color: var(--color-off-white);
  border-radius: 4px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all var(--transition-base);
  border: none;
}

.hero-cta:hover {
  background: var(--color-copper-light);
  color: var(--color-off-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(184, 120, 96, 0.3);
  border-bottom: none;
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */

.section {
  padding: var(--space-2xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--color-gray-medium);
  max-width: 60ch;
  margin: 0 auto var(--space-xl);
}

/* ============================================
   CARD COMPONENTS
   ============================================ */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.card {
  padding: var(--space-lg);
  background: white;
  border-radius: 8px;
  border: 1px solid rgba(44, 52, 64, 0.1);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(44, 52, 64, 0.1);
  border-color: var(--color-copper);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--color-charcoal);
}

.card-description {
  color: var(--color-gray-medium);
  line-height: 1.6;
}

/* ============================================
   ARTICLE/POST STYLES
   ============================================ */

.article-header {
  text-align: left;
  padding: var(--space-md) 0 var(--space-xs) 0;
  border-bottom: 1px solid rgba(44, 52, 64, 0.1);
}

.article-header .container-prose {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
}

.article-header h1 {
  margin-bottom: 0;
}

.article-meta {
  font-size: 0.875rem;
  color: var(--color-gray-medium);
  margin-bottom: 0;
}

.article-content {
  padding: var(--space-sm) 0 var(--space-2xl) 0;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: var(--space-lg) 0;
}

.article-content img:first-child {
  margin-top: 0;
}

.article-content ul,
.article-content ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-lg);
}

.article-content li {
  margin-bottom: var(--space-sm);
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
  margin-top: var(--space-3xl);
  padding: var(--space-xl) 0;
  border-top: 1px solid rgba(44, 52, 64, 0.1);
  background: rgba(44, 52, 64, 0.02);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: start;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-section {
  flex: 1;
  min-width: 200px;
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
  color: var(--color-charcoal);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--color-gray-medium);
  font-size: 0.9rem;
}

.footer-bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(44, 52, 64, 0.1);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-gray-medium);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

.text-copper {
  color: var(--color-copper);
}

.text-muted {
  color: var(--color-gray-medium);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  :root {
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .hero-subtitle {
    font-size: 1.125rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

.skip-to-content {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-copper);
  color: var(--color-off-white);
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  z-index: 100;
}

.skip-to-content:focus {
  top: 0;
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-copper);
  outline-offset: 2px;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}