/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Pacifico&family=Roboto+Mono:wght@700&display=swap');

/* CSS Variables for theming */
:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --link-color: #0066cc;
  --link-hover: #004499;
  --code-bg: #f5f5f5;
  --code-text: #333333;
  --header-border: #cccccc;
}

/* Dark mode - system preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --text-secondary: #a0a0a0;
    --border-color: #404040;
    --link-color: #6699ff;
    --link-hover: #99bbff;
    --code-bg: #2a2a2a;
    --code-text: #e0e0e0;
    --header-border: #404040;
  }
}

/* Dark mode - manual override */
[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --text-color: #e0e0e0;
  --text-secondary: #a0a0a0;
  --border-color: #404040;
  --link-color: #6699ff;
  --link-hover: #99bbff;
  --code-bg: #2a2a2a;
  --code-text: #e0e0e0;
  --header-border: #404040;
}

/* Base styles */
* {
  box-sizing: border-box;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  margin: 0;
  padding: 2rem 1rem;
  font-size: 18px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Center content */
body > * {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* Header styles */
header {
  border-bottom: 2px solid var(--header-border);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.site-title-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.site-header h1 {
  margin: 0 0 0.25rem 0;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.site-header .subtitle {
  margin: 0;
  font-size: 1rem;
  color: var(--text-secondary);
  font-family: "Courier New", Courier, monospace;
  font-weight: normal;
  white-space: nowrap;
  min-height: 1.5em;
}

/* Theme toggle button */
.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font-size: 1.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 50px;
  height: 50px;
}

.theme-toggle:hover {
  background-color: var(--code-bg);
  border-color: var(--link-color);
  transform: scale(1.05);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* Footer styles */
footer {
  border-top: 2px solid var(--header-border);
  padding-top: 1.5rem;
  margin-top: 3rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-social {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.footer-social a {
  color: var(--text-secondary);
  transition: color 0.2s ease, transform 0.2s ease;
  display: flex;
  align-items: center;
}

.footer-social a:hover {
  color: var(--link-color);
  transform: translateY(-2px);
  text-decoration: none;
}

.footer-content p {
  margin: 0;
  text-align: center;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  line-height: 1.3;
  font-weight: 600;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1.5rem;
}

/* Links */
a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

/* Code blocks */
code {
  background-color: var(--code-bg);
  color: var(--code-text);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
  font-family: "Courier New", Courier, monospace;
}

pre {
  background-color: var(--code-bg);
  color: var(--code-text);
  padding: 1rem;
  border-radius: 5px;
  overflow-x: auto;
  line-height: 1.5;
  margin: 1.5rem 0;
}

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

/* Lists */
ul, ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  border-radius: 5px;
  margin: 1.5rem 0;
}

/* Blockquotes */
blockquote {
  border-left: 4px solid var(--link-color);
  margin: 1.5rem 0;
  padding-left: 1rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* Notice boxes and callouts */
.notice {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  border-left: 4px solid;
}

.notice-info {
  background-color: #e3f2fd;
  border-color: #2196f3;
  color: #0d47a1;
}

[data-theme="dark"] .notice-info {
  background-color: #1a2332;
  border-color: #42a5f5;
  color: #90caf9;
}

.notice-warning {
  background-color: #fff3e0;
  border-color: #ff9800;
  color: #e65100;
}

[data-theme="dark"] .notice-warning {
  background-color: #2d2416;
  border-color: #ffa726;
  color: #ffcc80;
}

.notice-success {
  background-color: #e8f5e9;
  border-color: #4caf50;
  color: #1b5e20;
}

[data-theme="dark"] .notice-success {
  background-color: #1a2e1b;
  border-color: #66bb6a;
  color: #a5d6a7;
}

/* Pastel highlights and callouts */
.highlight-yellow {
  background-color: #fff9c4;
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

[data-theme="dark"] .highlight-yellow {
  background-color: #3d3a1a;
  color: #fff59d;
}

.highlight-pink {
  background-color: #fce4ec;
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

[data-theme="dark"] .highlight-pink {
  background-color: #3a2529;
  color: #f8bbd0;
}

.highlight-blue {
  background-color: #e1f5fe;
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

[data-theme="dark"] .highlight-blue {
  background-color: #1a2a33;
  color: #b3e5fc;
}

/* Navigation menu */
nav ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

nav li {
  margin: 0;
}

/* Site title link */
.site-title-link {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
}

.site-title-link:hover {
  color: var(--link-color);
  text-decoration: none;
}

/* Stylized logo */
.logo-sometimes {
  font-family: 'Pacifico', cursive;
  font-weight: 400;
  margin-right: 0.3rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .logo-sometimes {
  background: linear-gradient(135deg, #a78bfa 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-code {
  font-family: 'Roboto Mono', 'Courier New', monospace;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-color);
}

.cursor {
  display: inline-block;
  font-family: 'Roboto Mono', 'Courier New', monospace;
  font-weight: 700;
  color: #00ff41;
  animation: cursor-blink 1s ease-in-out infinite;
}

[data-theme="dark"] .cursor {
  color: #00ff41;
}

.cursor::after {
  content: '_';
}

@keyframes cursor-blink {
  0%, 49% {
    opacity: 1;
  }
  50%, 100% {
    opacity: 0;
  }
}

/* Post list on homepage */
.posts-list {
  margin-top: 3rem;
}

.post-summary {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.post-summary:last-child {
  border-bottom: none;
}

.post-summary h2 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.75rem;
}

.post-summary h2 a {
  color: var(--text-color);
  text-decoration: none;
}

.post-summary h2 a:hover {
  color: var(--link-color);
}

/* Post metadata */
.post-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.post-categories {
  display: flex;
  gap: 0.5rem;
}

.category {
  background-color: var(--code-bg);
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  font-size: 0.85rem;
}

/* Post excerpt */
.post-excerpt {
  color: var(--text-color);
  line-height: 1.7;
}

.read-more {
  display: inline-block;
  margin-top: 0.5rem;
  font-weight: 600;
}

/* Single post page */
.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  margin-bottom: 0.5rem;
}

.post-header .post-meta {
  margin-bottom: 0;
}

.post-content {
  margin-bottom: 3rem;
}

/* Post tags */
.post-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--border-color);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.post-tags strong {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.tag {
  background-color: var(--code-bg);
  color: var(--link-color);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.tag:hover {
  background-color: var(--link-color);
  color: var(--bg-color);
  text-decoration: none;
}

/* Edit page link */
.edit-page {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.9rem;
}

.edit-page a {
  color: var(--text-secondary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease;
}

.edit-page a:hover {
  color: var(--link-color);
  text-decoration: none;
}

.edit-page svg {
  transition: transform 0.2s ease;
}

.edit-page a:hover svg {
  transform: translateY(-2px);
}

/* Post navigation */
.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--border-color);
  gap: 2rem;
}

.post-nav-prev,
.post-nav-next {
  flex: 1;
}

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

.post-nav a {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  background-color: var(--code-bg);
  border-radius: 5px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.post-nav a:hover {
  background-color: var(--link-color);
  color: var(--bg-color);
  text-decoration: none;
}

/* Featured post on homepage */
.featured-post {
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 2px solid var(--border-color);
}

.featured-post h1 {
  margin-top: 0;
  margin-bottom: 1rem;
}

.featured-content {
  margin-top: 2rem;
}

.section-divider {
  margin: 3rem 0 2rem 0;
  text-align: center;
}

.section-divider h2 {
  display: inline-block;
  position: relative;
  padding: 0 2rem;
  margin: 0;
  background-color: var(--bg-color);
  z-index: 1;
}

.section-divider::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background-color: var(--border-color);
  z-index: 0;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  body {
    font-size: 16px;
    padding: 1rem;
  }

  .site-header h1 {
    font-size: 1.75rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.35rem;
  }

  nav ul {
    gap: 1rem;
  }

  .theme-toggle {
    min-width: 44px;
    height: 44px;
    padding: 0.4rem;
    font-size: 1.1rem;
  }

  .post-nav {
    flex-direction: column;
  }

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