/* Modern features and animations */
:root {
  --transition-speed: 0.3s;
  --bg-color: #1a1a1a;
  --text-color: #f5f5f5;
  --link-color: #3498db;
  --border-color: #333;
  --code-bg: #2d2d2d;
}

/* Dark theme base styles */
body {
  background-color: var(--bg-color);
  color: var(--text-color);
}

a {
  color: var(--link-color);
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Modern image handling */
img {
  max-width: 100%;
  height: auto;
  transition: opacity var(--transition-speed) ease-in-out;
}

img.lazy {
  opacity: 0;
}

img.lazy.loaded {
  opacity: 1;
}

/* Modern card effects */
.post-entry {
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
}

.post-entry:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
}

/* Modern navigation styles */
.modern-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-speed) ease;
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand .logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
}

.nav-menu {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  text-decoration: none;
  color: inherit;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: width var(--transition-speed) ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background: currentColor;
  transition: all var(--transition-speed) ease;
}

/* Dark mode styles */
@media (prefers-color-scheme: dark) {
  .modern-nav {
    background: rgba(0, 0, 0, 0.95);
  }
}

/* Mobile navigation */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: inherit;
    padding: 1rem;
    gap: 1rem;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-speed) ease;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* Modern button styles */
.button {
  padding: 0.8em 1.6em;
  border-radius: 4px;
  transition: all var(--transition-speed) ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Responsive improvements */
@media (max-width: 768px) {
  .post-content {
    font-size: 16px;
    line-height: 1.6;
  }
  
  .post-title {
    font-size: 24px;
  }
}

/* Dark mode improvements */
@media (prefers-color-scheme: dark) {
  .post-entry:hover {
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
  }
}

/* Modern loading animations */
.loading-spinner {
  width: 30px;
  height: 30px;
  border: 3px solid #333;
  border-top: 3px solid var(--link-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Improved code blocks */
pre {
  background: var(--code-bg);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  position: relative;
}

.copy-button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.3rem 0.6rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  color: var(--text-color);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
}

.copy-button:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Reading time */
.reading-time {
  font-size: 0.9rem;
  color: #888;
  margin-bottom: 1rem;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  font-size: 1.2rem;
  transition: transform var(--transition-speed) ease;
}

.theme-toggle:hover {
  transform: rotate(15deg);
}

/* Modern blockquote style */
blockquote {
  border-left: 4px solid var(--link-color);
  margin: 1.5em 0;
  padding: 1em 1.5em;
  background: rgba(52, 152, 219, 0.1);
  border-radius: 0 8px 8px 0;
}

/* Lightbox styles */
.lightbox-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  cursor: zoom-out;
  opacity: 0;
  transition: opacity var(--transition-speed) ease;
}

.lightbox-overlay.active {
  display: flex;
  opacity: 1;
  justify-content: center;
  align-items: center;
}

.lightbox-image {
  max-width: 90%;
  max-height: 90vh;
  object-fit: contain;
  transform: scale(0.9);
  transition: transform var(--transition-speed) ease;
  border-radius: 4px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.lightbox-overlay.active .lightbox-image {
  transform: scale(1);
}

.lightbox-close {
  position: fixed;
  top: 20px;
  right: 20px;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  background: none;
  border: none;
  padding: 10px;
  opacity: 0.7;
  transition: opacity var(--transition-speed) ease;
}

.lightbox-close:hover {
  opacity: 1;
}

/* Make images clickable */
img:not(.lightbox-image) {
  cursor: zoom-in;
}

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--accent);
    color: var(--background);
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    z-index: 99;
}

.back-to-top.show {
    opacity: 1;
    pointer-events: auto;
    cursor: pointer;
}

.back-to-top:hover {
    background-color: var(--accent-alpha-70);
    transform: translateY(-3px);
}

/* Dark mode support */
[data-theme="dark"] .back-to-top {
    background-color: var(--accent);
    color: var(--background);
}

[data-theme="dark"] .back-to-top:hover {
    background-color: var(--accent-alpha-70);
}