:root {
  /* Light Mode Colors */
  --bg-light: #ffffff;
  --text-light: #1a1a1a;
  --card-bg-light: #f8fafc;
  --border-light: #e2e8f0;
  --header-bg-light: rgba(255, 255, 255, 0.95);

  /* Dark Mode Colors */
  --bg-dark: #0f0f23;
  --text-dark: #e2e8f0;
  --card-bg-dark: #1a1a2e;
  --border-dark: #16213e;
  --header-bg-dark: rgba(15, 15, 35, 0.95);

  /* Neon Digital Palette */
  --neon-blue: #00d4ff;
  --neon-purple: #b347d9;
  --neon-green: #39ff14;
  --neon-pink: #ff0080;
  --neon-cyan: #00ffff;
  --neon-orange: #ff6b35;
  --primary: var(--neon-blue);
  --secondary: var(--neon-purple);
  --accent: var(--neon-green);
  --warning: var(--neon-orange);
  --error: var(--neon-pink);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  --gradient-accent: linear-gradient(135deg, var(--neon-green), var(--neon-cyan));
  --gradient-card: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(179, 71, 217, 0.1));
  --gradient-bg: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);

  /* Shadows */
  --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-dark: 0 4px 30px rgba(0, 0, 0, 0.3);
  --shadow-neon: 0 0 20px rgba(0, 212, 255, 0.3);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.5);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Spacing */
  --radius: 12px;
  --radius-large: 20px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-light);
  color: var(--text-light);
  margin: 0;
  padding: 0;
  transition: background var(--transition-smooth), color var(--transition-smooth);
  line-height: 1.6;
  overflow-x: hidden;
}

body.dark {
  background: var(--bg-dark);
  color: var(--text-dark);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--header-bg-light);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  padding: var(--spacing-md) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  transition: all var(--transition-smooth);
}

body.dark .header {
  background: var(--header-bg-dark);
  border-bottom-color: var(--border-dark);
}

.header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.theme-toggle {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: 50px;
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  background: var(--primary);
  color: white;
  transform: scale(1.05);
  box-shadow: var(--shadow-neon);
}

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

/* Main Content */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 6rem var(--spacing-xl) var(--spacing-xl);
  min-height: 100vh;
  transition: opacity var(--transition-smooth);
}

/* Cards */
.card {
  background: var(--card-bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-light);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

body.dark .card {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
  box-shadow: var(--shadow-dark);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-smooth);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0, 212, 255, 0.2);
}

/* Buttons */
.btn {
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--gradient-primary);
}

.btn-secondary {
  background: var(--gradient-accent);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

body.dark .btn-outline {
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

.btn.active {
  background: var(--primary);
  color: white;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--text-light);
}

body.dark .form-group label {
  color: var(--text-dark);
}

input, textarea, select {
  background: var(--card-bg-light);
  border: 2px solid var(--border-light);
  border-radius: var(--radius);
  padding: var(--spacing-sm);
  font-size: 1rem;
  transition: all var(--transition-fast);
  width: 100%;
  font-family: inherit;
  color: var(--text-light);
}

body.dark input,
body.dark textarea,
body.dark select {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
  color: var(--text-dark);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

input:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

small {
  color: #666;
  font-size: 0.8rem;
}

body.dark small {
  color: #999;
}

/* File Upload */
.file-upload-area {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius);
  padding: var(--spacing-xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.02), rgba(179, 71, 217, 0.02));
}

body.dark .file-upload-area {
  border-color: var(--border-dark);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(179, 71, 217, 0.05));
}

.file-upload-area:hover,
.file-upload-area.drag-over {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(179, 71, 217, 0.1));
  transform: scale(1.02);
  box-shadow: 0 5px 20px rgba(0, 212, 255, 0.2);
}

.file-upload-area input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-upload-text {
  pointer-events: none;
}

.file-upload-text span {
  display: block;
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}

/* File Previews */
.file-previews {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.file-preview {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card-bg-light);
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
  animation: slideInUp 0.3s ease-out;
}

body.dark .file-preview {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
}

.file-preview:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 212, 255, 0.2);
}

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

.file-preview img,
.file-preview video {
  width: 100%;
  height: 80px;
  object-fit: cover;
  transition: transform var(--transition-fast);
}

.file-preview img:hover,
.file-preview video:hover {
  transform: scale(1.05);
}

.file-preview audio {
  width: 100%;
  height: 40px;
}

.file-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  font-size: 2rem;
}

.file-name {
  display: block;
  padding: var(--spacing-xs);
  font-size: 0.8rem;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

.file-remove {
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  background: linear-gradient(135deg, var(--error), #ff4757);
  color: white;
  border: none;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  cursor: pointer;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  opacity: 0.8;
}

.file-remove:hover {
  opacity: 1;
  transform: scale(1.1);
  box-shadow: 0 2px 8px rgba(255, 0, 0, 0.4);
}

/* Upload Progress */
.upload-progress {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  background: var(--card-bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  animation: slideInDown 0.3s ease-out;
}

body.dark .upload-progress {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-light);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

body.dark .progress-bar {
  background: var(--border-dark);
}

.progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 4px;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.progress-text {
  font-size: 0.9rem;
  color: var(--text-light);
}

body.dark .progress-text {
  color: var(--text-dark);
}

.progress-percentage {
  font-weight: 600;
  color: var(--primary);
}

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

/* Navigation */
.navigation-card {
  text-align: center;
}

.nav-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  justify-content: center;
}

/* Posts */
.posts-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Feed Header */
.feed-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--card-bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow-light);
}

body.dark .feed-header {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
  box-shadow: var(--shadow-dark);
}

.feed-header h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feed-controls {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.sort-select {
  background: var(--card-bg-light);
  border: 2px solid var(--border-light);
  border-radius: var(--radius);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.9rem;
  color: var(--text-light);
  cursor: pointer;
  transition: all var(--transition-fast);
}

body.dark .sort-select {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
  color: var(--text-dark);
}

.sort-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.post-card {
  background: var(--card-bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  transition: all var(--transition-smooth);
  opacity: 0;
  transform: translateY(20px);
  position: relative;
  overflow: hidden;
}

body.dark .post-card {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  transition: left var(--transition-smooth);
}

.post-card:hover::before {
  left: 0;
}

.post-card.fade-in {
  opacity: 1;
  transform: translateY(0);
  animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0, 212, 255, 0.2);
  border-color: var(--primary);
}

body.dark .post-card:hover {
  box-shadow: 0 10px 40px rgba(0, 212, 255, 0.3);
}

.post-header {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.author-avatar {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.2rem;
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
  transition: all var(--transition-fast);
}

.author-avatar:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

.author-info {
  flex: 1;
}

.author-info strong {
  color: var(--primary);
  font-weight: 600;
  font-size: 1.1rem;
  display: block;
  margin-bottom: 2px;
}

.post-time {
  color: #666;
  font-size: 0.8rem;
  display: block;
}

body.dark .post-time {
  color: #999;
}

.post-delete {
  background: none;
  border: none;
  color: var(--error);
  cursor: pointer;
  font-size: 1.2rem;
  padding: var(--spacing-xs);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
}

.post-delete:hover {
  background: rgba(255, 0, 128, 0.1);
  transform: scale(1.1);
}

.post-content {
  margin-bottom: var(--spacing-md);
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
}

.post-media {
  margin: var(--spacing-md) 0;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}

.post-media img,
.post-media video {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.post-media img:hover,
.post-media video:hover {
  transform: scale(1.02);
}

.post-media audio {
  width: 100%;
}

.media-download {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.6));
  color: white;
  border: none;
  border-radius: var(--radius);
  padding: var(--spacing-xs) var(--spacing-sm);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
  opacity: 0;
}

.post-media:hover .media-download {
  opacity: 1;
}

.media-download:hover {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.file-attachment {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gradient-primary);
  color: white;
  text-decoration: none;
  border-radius: var(--radius);
  transition: all var(--transition-fast);
  font-weight: 500;
}

.file-attachment:hover {
  background: var(--gradient-accent);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

/* Post Actions */
.post-actions {
  display: flex;
  gap: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-light);
  align-items: center;
  flex-wrap: wrap;
}

body.dark .post-actions {
  border-top-color: var(--border-dark);
}

.like-btn,
.comment-btn,
.share-btn,
.reply-btn {
  background: none;
  border: none;
  color: #666;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
  font-size: 0.9rem;
}

body.dark .like-btn,
body.dark .comment-btn,
body.dark .share-btn,
body.dark .reply-btn {
  color: #999;
}

.like-btn:hover,
.comment-btn:hover,
.share-btn:hover,
.reply-btn:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--primary);
  transform: scale(1.05);
}

.like-btn.liked {
  color: var(--error);
}

.like-btn.pulse {
  animation: pulse 0.3s ease-out;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* Comments System */
.comments-section {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--border-light);
  animation: slideInDown 0.3s ease-out;
}

body.dark .comments-section {
  border-top-color: var(--border-dark);
}

.comment-form {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  align-items: center;
}

.comment-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-light);
  border-radius: 25px;
  background: var(--card-bg-light);
  color: var(--text-light);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

body.dark .comment-input {
  border-color: var(--border-dark);
  background: var(--card-bg-dark);
  color: var(--text-dark);
}

.comment-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
  transform: scale(1.02);
}

.comment-submit {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 25px;
  font-size: 0.9rem;
  min-width: 80px;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.comment {
  position: relative;
  background: rgba(0, 212, 255, 0.03);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  transition: all var(--transition-smooth);
  animation: fadeInUp 0.4s ease-out;
}

body.dark .comment {
  background: rgba(0, 212, 255, 0.08);
}

.comment:hover {
  background: rgba(0, 212, 255, 0.08);
  transform: translateX(5px);
}

body.dark .comment:hover {
  background: rgba(0, 212, 255, 0.12);
}

.comment-reply {
  margin-left: var(--spacing-xl);
  border-left: 3px solid var(--primary);
  background: rgba(179, 71, 217, 0.03);
}

body.dark .comment-reply {
  background: rgba(179, 71, 217, 0.08);
}

.comment-reply:hover {
  background: rgba(179, 71, 217, 0.08);
}

body.dark .comment-reply:hover {
  background: rgba(179, 71, 217, 0.12);
}

.reply-line {
  position: absolute;
  left: -3px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.comment[data-level="1"] {
  margin-left: calc(var(--spacing-xl) * 1);
  border-left-color: var(--secondary);
}

.comment[data-level="2"] {
  margin-left: calc(var(--spacing-xl) * 2);
  border-left-color: var(--accent);
}

.comment[data-level="3"] {
  margin-left: calc(var(--spacing-xl) * 3);
  border-left-color: var(--warning);
}

.comment[data-level="4"] {
  margin-left: calc(var(--spacing-xl) * 4);
  border-left-color: var(--error);
}

.comment-content-wrapper {
  position: relative;
}

.comment-header {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.comment-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.comment-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.8rem;
  box-shadow: 0 2px 8px rgba(179, 71, 217, 0.3);
}

.comment-author strong {
  color: var(--secondary);
  font-weight: 600;
  font-size: 0.9rem;
}

.comment-time {
  color: #666;
  font-size: 0.7rem;
  margin-left: var(--spacing-xs);
}

body.dark .comment-time {
  color: #999;
}

.comment-content {
  margin-bottom: var(--spacing-sm);
  line-height: 1.5;
  word-break: break-word;
  font-size: 0.9rem;
}

.comment-actions {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.comment-like-btn,
.reply-btn {
  background: none;
  border: none;
  color: #666;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
  font-size: 0.8rem;
}

body.dark .comment-like-btn,
body.dark .reply-btn {
  color: #999;
}

.comment-like-btn:hover,
.reply-btn:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--primary);
  transform: scale(1.05);
}

.comment-like-btn.pulse {
  animation: pulse 0.3s ease-out;
}

.reply-form {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(0, 212, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  animation: slideInDown 0.3s ease-out;
}

body.dark .reply-form {
  background: rgba(0, 212, 255, 0.05);
  border-color: var(--border-dark);
}

.reply-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-light);
  border-radius: 20px;
  background: var(--card-bg-light);
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
  transition: all var(--transition-fast);
}

body.dark .reply-input {
  border-color: var(--border-dark);
  background: var(--card-bg-dark);
  color: var(--text-dark);
}

.reply-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.reply-form-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

.reply-submit,
.reply-cancel {
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 20px;
  font-size: 0.8rem;
  min-width: 70px;
}

.replies {
  margin-top: var(--spacing-md);
}

/* Load More */
.load-more-container {
  text-align: center;
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
}

.load-more-container .btn {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  border-radius: 30px;
  min-width: 200px;
  position: relative;
  overflow: hidden;
}

.load-more-container .btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3), transparent);
  transition: all 0.3s ease;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.load-more-container .btn:hover::before {
  width: 200px;
  height: 200px;
}

/* Enhanced Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
    max-height: 0;
  }
  to {
    opacity: 1;
    transform: translateY(0);
    max-height: 500px;
  }
}

/* Comment Button Active State */
.comment-btn.active {
  background: rgba(0, 212, 255, 0.1);
  color: var(--primary);
  transform: scale(1.05);
}

.comment-btn.active .reaction-icon {
  animation: bounce 0.5s ease-out;
}

@keyframes bounce {
  0%, 20%, 60%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  80% {
    transform: translateY(-5px);
  }
}
/* Reactions */
.reactions-dropdown {
  position: relative;
  display: inline-block;
}

.reactions-btn {
  background: none;
  border: none;
  color: #666;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
  font-size: 0.9rem;
}

body.dark .reactions-btn {
  color: #999;
}

.reactions-btn:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--primary);
  transform: scale(1.05);
}

.reactions-menu {
  position: absolute;
  bottom: 100%;
  left: 0;
  background: var(--card-bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: var(--spacing-xs);
  display: none;
  z-index: 1000;
  box-shadow: var(--shadow-light);
  animation: slideUp 0.2s ease-out;
}

body.dark .reactions-menu {
  background: var(--card-bg-dark);
  border-color: var(--border-dark);
  box-shadow: var(--shadow-dark);
}

.reaction-option {
  background: none;
  border: none;
  font-size: 1.2rem;
  padding: var(--spacing-xs);
  margin: 2px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.reaction-option:hover {
  background: rgba(0, 212, 255, 0.1);
  transform: scale(1.2);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Comments */
.comments-section {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-light);
}

body.dark .comments-section {
  border-top-color: var(--border-dark);
}

.comments-list {
  margin-bottom: var(--spacing-md);
}

.comment {
  background: rgba(0, 212, 255, 0.05);
  border-radius: var(--radius);
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  transition: all var(--transition-smooth);
  position: relative;
}

body.dark .comment {
  background: rgba(0, 212, 255, 0.1);
}

.comment.level-1 {
  background: rgba(179, 71, 217, 0.05);
  border-left: 2px solid var(--secondary);
}

.comment.level-2 {
  background: rgba(57, 255, 20, 0.05);
  border-left: 2px solid var(--accent);
}

.comment.level-3 {
  background: rgba(255, 107, 53, 0.05);
  border-left: 2px solid var(--warning);
}

body.dark .comment.level-1 {
  background: rgba(179, 71, 217, 0.1);
}

body.dark .comment.level-2 {
  background: rgba(57, 255, 20, 0.1);
}

body.dark .comment.level-3 {
  background: rgba(255, 107, 53, 0.1);
}

.comment-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
}

.comment-header strong {
  color: var(--secondary);
  font-size: 0.9rem;
}

.comment-time {
  color: #666;
  font-size: 0.7rem;
}

body.dark .comment-time {
  color: #999;
}

.comment-delete {
  background: none;
  border: none;
  color: var(--error);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 2px;
}

.comment-content {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-xs);
  word-break: break-word;
}

.comment-actions {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  margin-top: var(--spacing-xs);
}

.comment-form {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.comment-input {
  flex: 1;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  background: var(--card-bg-light);
  font-size: 0.9rem;
}

body.dark .comment-input {
  border-color: var(--border-dark);
  background: var(--card-bg-dark);
  color: var(--text-dark);
}

/* Reply Forms */
.reply-form {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: rgba(0, 212, 255, 0.02);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
}

body.dark .reply-form {
  background: rgba(0, 212, 255, 0.05);
  border-color: var(--border-dark);
}

.reply-input {
  width: 100%;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  background: var(--card-bg-light);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
}

body.dark .reply-input {
  border-color: var(--border-dark);
  background: var(--card-bg-dark);
  color: var(--text-dark);
}

.replies {
  margin-top: var(--spacing-sm);
}

/* New Post Animation */
.new-post {
  opacity: 0;
  transform: translateY(-20px);
  border-left: 4px solid var(--accent);
}

.new-post.fade-in {
  opacity: 1;
  transform: translateY(0);
}

/* Loading States */
.loading-skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.skeleton-post {
  background: var(--card-bg-light);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

body.dark .skeleton-post {
  background: var(--card-bg-dark);
}

.skeleton-post::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
  animation: skeleton-loading 1.5s infinite;
}

body.dark .skeleton-post::before {
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.2), transparent);
}

@keyframes skeleton-loading {
  0% { left: -100%; }
  100% { left: 100%; }
}

.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: #666;
  font-size: 1.1rem;
}

body.dark .empty-state {
  color: #999;
}

/* Load More */
.load-more {
  text-align: center;
  margin: var(--spacing-xl) 0;
}

/* Scroll to Top Button */
.scroll-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-smooth);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-light);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-neon);
}

/* Offline Banner */
.offline-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, var(--warning), var(--error));
  color: white;
  padding: var(--spacing-sm);
  transform: translateY(-100%);
  transition: transform var(--transition-smooth);
  z-index: 1001;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.offline-banner.show {
  transform: translateY(0);
}

.offline-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  max-width: 800px;
  margin: 0 auto;
}

.offline-icon {
  font-size: 1.5rem;
  animation: pulse 2s infinite;
}

.offline-count {
  font-size: 0.8rem;
  opacity: 0.9;
  margin-top: 2px;
  display: none;
}

/* Install Banner */
.install-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--gradient-primary);
  color: white;
  padding: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transform: translateY(100%);
  transition: transform var(--transition-smooth);
  z-index: 1000;
}

.install-banner.show {
  transform: translateY(0);
}

.install-banner button {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius);
  cursor: pointer;
  margin-left: var(--spacing-sm);
  transition: all var(--transition-fast);
}

.install-banner button:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  backdrop-filter: blur(10px);
  animation: fadeIn 0.3s ease-out;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: scaleIn 0.3s ease-out;
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.lightbox-media img,
.lightbox-media video {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: linear-gradient(135deg, rgba(255, 0, 0, 0.8), rgba(255, 0, 0, 0.6));
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(255, 0, 0, 0.3);
}

.lightbox-controls {
  margin-top: var(--spacing-md);
}

/* Notifications */
.notification {
  position: fixed;
  top: 100px;
  right: var(--spacing-xl);
  background: var(--card-bg-light);
  color: var(--text-light);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  box-shadow: var(--shadow-light);
  transform: translateX(100%);
  transition: transform var(--transition-smooth);
  z-index: 1500;
  max-width: 300px;
  border-left: 4px solid var(--primary);
}

body.dark .notification {
  background: var(--card-bg-dark);
  color: var(--text-dark);
  box-shadow: var(--shadow-dark);
}

.notification.show {
  transform: translateX(0);
}

.notification.success {
  border-left-color: var(--accent);
}

.notification.error {
  border-left-color: var(--error);
}

.notification.warning {
  border-left-color: var(--warning);
}

.premium-badge {
  background: var(--gradient-primary);
  color: white;
  padding: 1px 4px;
  border-radius: 8px;
  font-size: 0.6rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.chat-preview {

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

@keyframes slideIn {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(0.9);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

.slide-in {
  animation: slideIn 0.3s ease-out;
}

.fade-out {
  animation: fadeOut 0.3s ease-out;
}

@keyframes heartPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

@keyframes buttonGlow {
  0% { box-shadow: 0 0 5px rgba(0, 212, 255, 0.3); }
  50% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.6); }
  100% { box-shadow: 0 0 5px rgba(0, 212, 255, 0.3); }
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Enhanced Button Interactions */
.btn:hover {
  animation: buttonGlow 2s infinite;
}

.like-btn.pulse .reaction-icon {
  animation: heartPulse 0.6s ease-out;
}

/* New Post Slide In */
.new-post {
  animation: slideInFromRight 0.5s ease-out;
}

/* Comment Expand Animation */
.comments-section {
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.comments-section[style*="display: block"] {
  animation: slideInDown 0.3s ease-out;
}

/* Notification Bounce */
.notification.show {
  animation: bounceIn 0.5s ease-out;
}

/* Theme Toggle Animation */
.theme-toggle {
  position: relative;
  overflow: hidden;
}

.theme-toggle::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.3), transparent);
  transition: all 0.3s ease;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.theme-toggle:hover::before {
  width: 100px;
  height: 100px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header {
    padding: var(--spacing-md);
  }
  
  .feed-header {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .feed-controls {
    flex-direction: column;
    width: 100%;
  }
  
  .sort-select {
    width: 100%;
  }
  
  .offline-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-xs);
  }
  
  .offline-icon {
    font-size: 1.2rem;
  }
  
  .header h1 {
    font-size: 1.2rem;
  }
  
  .container {
    padding: 5rem var(--spacing-md) var(--spacing-xl);
  }
  
  .card {
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
  }
  
  .nav-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }
  
  .post-actions {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
  
  .post-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  .author-avatar {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .comment-form {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .comment-input {
    margin-bottom: var(--spacing-sm);
  }
  
  .comment-reply {
    margin-left: var(--spacing-md);
  }
  
  .comment[data-level="1"] {
    margin-left: var(--spacing-md);
  }
  
  .comment[data-level="2"] {
    margin-left: calc(var(--spacing-md) * 1.5);
  }
  
  .comment[data-level="3"] {
    margin-left: calc(var(--spacing-md) * 2);
  }
  
  .comment[data-level="4"] {
    margin-left: calc(var(--spacing-md) * 2.5);
  }
  
  .reactions-menu {
    left: auto;
    right: 0;
  }
  
  .file-previews {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
  
  .scroll-top {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 45px;
    height: 45px;
  }
  
  .notification {
    right: var(--spacing-md);
    max-width: calc(100vw - 2rem);
  }
}

@media (max-width: 480px) {
  .header {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }
  
  .container {
    padding: 7rem var(--spacing-sm) var(--spacing-xl);
  }
  
  .comment-actions {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
  
  .reply-form-actions {
    flex-direction: column;
  }
  
  .reply-submit,
  .reply-cancel {
    width: 100%;
  }
  
  .install-banner {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
  
  .install-banner button {
    margin: 0;
    width: 100%;
  }
  
  .nav-buttons {
    grid-template-columns: 1fr;
  }
}

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

/* Focus styles for keyboard navigation */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.5);
    --shadow-dark: 0 2px 10px rgba(255, 255, 255, 0.2);
  }
}

/* Print styles */
@media print {
  .header,
  .scroll-top,
  .offline-banner,
  .install-banner,
  .lightbox {
    display: none !important;
  }
  
  .container {
    padding-top: 0;
  }
  
  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}