:root {
  --primary-color: #0066cc;
  --primary-hover: #0052a3;
  --accent-color: #00d4aa;
  --accent-hover: #00b894;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --bg-primary: #ffffff;
  --bg-secondary: #f7fafc;
  --bg-accent: #ebf8ff;
  --bg-code: #2d3748;
  --text-code: #f7fafc;
  --border-color: #e2e8f0;
  --border-accent: #00d4aa;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -1px rgb(0 0 0 / 0.06);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 10px 10px -5px rgb(0 0 0 / 0.04);
  --shadow-code: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -2px rgb(0 0 0 / 0.05);
  --gradient-primary: linear-gradient(135deg, #0066cc 0%, #0052a3 100%);
  --gradient-accent: linear-gradient(135deg, #00d4aa 0%, #00b894 100%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", "Helvetica Neue", Arial, sans-serif,
    "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  font-display: swap;
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  line-height: 1.7;
  color: var(--text-primary);
  background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
  min-height: 100vh;
  position: relative;
}

/* Add subtle pattern overlay */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(
      circle at 25px 25px,
      rgba(0, 102, 204, 0.1) 2px,
      transparent 2px
    ),
    radial-gradient(
      circle at 75px 75px,
      rgba(0, 212, 170, 0.05) 2px,
      transparent 2px
    );
  background-size: 100px 100px;
  pointer-events: none;
  z-index: -1;
  opacity: 0.4;
}

.header {
  background: var(--gradient-primary);
  border-radius: 16px;
  color: white;
  padding: 2rem;
  margin-bottom: 3rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(255, 255, 255, 0.03) 10px,
    rgba(255, 255, 255, 0.03) 20px
  );
  animation: movePattern 20s linear infinite;
}

@keyframes movePattern {
  0% {
    transform: translateX(-50px) translateY(-50px);
  }
  100% {
    transform: translateX(50px) translateY(50px);
  }
}

.header .site-title {
  margin: 0;
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  position: relative;
  z-index: 1;
}

.header .site-title::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--accent-color);
  border-radius: 2px;
}

.header .site-title a {
  color: white;
  text-decoration: none;
}

nav {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

nav a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

nav a::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

nav a:hover::before {
  left: 100%;
}

nav a:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: white;
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

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

article {
  background: var(--bg-primary);
  border-radius: 16px;
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
}

article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-accent);
}

article h1 {
  line-height: 1.4;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  font-weight: 700;
}

article h2 {
  position: relative;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

article h2 a {
  display: inline-block;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1.4;
  transition: color 0.3s ease;
  position: relative;
}

article h2 a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width 0.3s ease;
}

article h2 a:hover {
  color: var(--primary-color);
}

article h2 a:hover::after {
  width: 100%;
}

article h2 a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

article p a,
article li a,
article div a {
  color: var(--primary-color);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
  position: relative;
  font-weight: 500;
}

article p a::after,
article li a::after,
article div a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width 0.3s ease;
}

article p a:hover,
article li a:hover,
article div a:hover {
  color: var(--primary-hover);
  border-bottom-color: var(--accent-color);
}

article p a:hover::after,
article li a:hover::after,
article div a:hover::after {
  width: 100%;
}

article p a:focus,
article li a:focus,
article div a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: 2px;
}

article
  p
  a[href^="http"]:not([href*="localhost"]):not([href*="127.0.0.1"])::before,
article
  li
  a[href^="http"]:not([href*="localhost"]):not([href*="127.0.0.1"])::before,
article
  div
  a[href^="http"]:not([href*="localhost"]):not([href*="127.0.0.1"])::before {
  content: "🔗 ";
  opacity: 0.7;
  font-size: 0.8em;
  margin-right: 0.25rem;
}

time {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  background: var(--bg-accent);
  border-radius: 25px;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

time:hover {
  background: var(--accent-color);
  color: white;
  transform: translateY(-1px);
}

time::before {
  content: "📅 ";
  margin-right: 0.5rem;
}

.article-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.reading-time {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border-radius: 25px;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.reading-time:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

.reading-time::before {
  content: "⏱️ ";
  margin-right: 0.5rem;
}

pre {
  background: var(--bg-code);
  color: var(--text-code);
  padding: 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
  box-shadow: var(--shadow-code);
  border: 1px solid #4a5568;
  font-family: "Fira Code", "SF Mono", "Monaco", "Inconsolata", "Roboto Mono",
    monospace;
  position: relative;
  margin: 1.5rem 0;
}

pre::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

pre::after {
  content: "{ code }";
  position: absolute;
  top: 0.5rem;
  right: 1rem;
  font-size: 0.75rem;
  color: var(--accent-color);
  font-weight: 600;
}

code {
  background: #e2e8f0;
  color: #2d3748;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-family: "Fira Code", "SF Mono", "Monaco", "Inconsolata", "Roboto Mono",
    monospace;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid #cbd5e0;
}

/* Když je code uvnitř pre, nepoužije se styling */
pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  border: none;
  font-size: inherit;
}

.archive-section {
  background: var(--bg-primary);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

.archive-section h2 {
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.25rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.archive-section ul {
  list-style: none;
  padding: 0;
}

.archive-section li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.2s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.archive-section li:last-child {
  border-bottom: none;
}

.archive-section li:hover {
  background-color: var(--bg-secondary);
  margin: 0 -1rem;
  padding-left: 1rem;
  padding-right: 1rem;
  border-radius: 6px;
}

.archive-section a {
  text-decoration: none;
  color: var(--text-primary);
  flex-grow: 1;
}

.archive-section a:hover {
  color: var(--primary-color);
}

.archive-section time {
  margin-left: 1rem;
}

footer {
  background: var(--bg-primary);
  border-radius: 16px;
  margin-top: 4rem;
  padding: 2rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
}

footer::after {
  content: "// End of content";
  position: absolute;
  top: 0.5rem;
  right: 1rem;
  font-size: 0.75rem;
  color: var(--accent-color);
  font-family: "Fira Code", monospace;
  font-weight: 600;
}

@media (max-width: 768px) {
  body {
    padding: 15px;
  }

  .header {
    padding: 1.5rem;
  }

  .header .site-title {
    font-size: 2.2rem;
  }

  nav {
    flex-direction: column;
    gap: 0.5rem;
  }

  nav a {
    padding: 0.75rem 1rem;
  }

  article {
    padding: 1.5rem;
  }

  .article-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  pre {
    font-size: 0.85rem;
    padding: 1rem;
  }

  pre::after {
    display: none;
  }
}

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

main {
  animation: fadeIn 0.6s ease-out;
}

a {
  transition: color 0.2s ease;
}

button,
.button {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease;
  text-decoration: none;
  display: inline-block;
}

button:hover,
.button:hover {
  background: var(--primary-hover);
}

button:focus,
.button:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: 10px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px 16px;
  border-radius: 4px;
  text-decoration: none;
  z-index: 1000;
  transform: translateY(-100vh);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

@media (max-width: 640px) {
  body {
    padding: 10px;
  }

  .archive-section li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .archive-section time {
    margin-left: 0;
    margin-top: 0.25rem;
  }

  .header .site-title {
    font-size: 1.75rem;
  }

  article h2 a {
    font-size: 1.25rem;
    line-height: 1.4;
  }

  pre {
    font-size: 0.8rem;
    padding: 1rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary-color: #4299e1;
    --primary-hover: #3182ce;
    --accent-color: #38b2ac;
    --accent-hover: #319795;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-accent: #2c5282;
    --bg-code: #0d1117;
    --text-code: #f0f6fc;
    --border-color: #4a5568;
    --border-accent: #38b2ac;
  }

  body {
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
  }

  body::before {
    background-image: radial-gradient(
        circle at 25px 25px,
        rgba(66, 153, 225, 0.1) 2px,
        transparent 2px
      ),
      radial-gradient(
        circle at 75px 75px,
        rgba(56, 178, 172, 0.05) 2px,
        transparent 2px
      );
  }

  pre {
    background: var(--bg-code);
    color: var(--text-code);
    border-color: #30363d;
  }

  code {
    background: #21262d;
    color: #79c0ff;
    border-color: #30363d;
  }

  .header::before {
    background: repeating-linear-gradient(
      45deg,
      transparent,
      transparent 10px,
      rgba(255, 255, 255, 0.05) 10px,
      rgba(255, 255, 255, 0.05) 20px
    );
  }
}

*:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: 4px;
}

@media print {
  .header nav,
  footer {
    display: none;
  }

  article {
    box-shadow: none;
    border: none;
  }
}

@media (prefers-contrast: high) {
  :root {
    --primary-color: #000080;
    --text-primary: #000000;
    --bg-primary: #ffffff;
    --border-color: #000000;
  }
}

/* Related Articles Section */
.related-articles {
  margin: 3rem 0;
  padding: 2rem;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.related-articles h2 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
  font-size: 1.5rem;
}

.related-articles ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.related-articles li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.related-articles li:last-child {
  border-bottom: none;
}

.related-articles a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  flex: 1;
  margin-right: 1rem;
}

.related-articles a:hover {
  color: var(--primary-hover);
}

.related-articles time {
  color: var(--text-muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

/* Article Navigation */
.article-navigation {
  margin: 2rem 0;
}

.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.article-nav-prev,
.article-nav-next {
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.article-nav-next {
  text-align: right;
}

.nav-label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.article-nav a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  display: block;
}

.article-nav a:hover {
  color: var(--primary-hover);
}

/* Responsive design for article navigation */
@media (max-width: 768px) {
  .article-nav {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .article-nav-next {
    text-align: left;
  }

  .related-articles li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .related-articles a {
    margin-right: 0;
  }
}