/* App Layout */
.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.app-header h1 {
  margin: 0;
  font-size: 1.8rem;
  font-weight: 600;
}

.app-main {
  flex: 1;
  padding: 2rem;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.app-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.app-footer {
  background: #f8f9fa;
  padding: 1rem;
  text-align: center;
  color: #666;
  border-top: 1px solid #e9ecef;
}

/* Server Status */
.server-status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online {
  background: #28a745;
  box-shadow: 0 0 8px rgba(40, 167, 69, 0.6);
}

.status-dot.offline {
  background: #dc3545;
  box-shadow: 0 0 8px rgba(220, 53, 69, 0.6);
}

/* Error Display */
.error-display {
  margin-bottom: 1rem;
  padding: 1rem;
  border-radius: 8px;
  position: relative;
}

.error-display.server-error {
  background: #f8d7da;
  border: 1px solid #f5c6cb;
  color: #721c24;
}

.error-display.general-error {
  background: #fff3cd;
  border: 1px solid #ffeaa7;
  color: #856404;
}

.error-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.server-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.status-indicator.offline {
  width: 8px;
  height: 8px;
  background: #dc3545;
  border-radius: 50%;
}

.error-message {
  margin: 0;
}

.dismiss-button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: inherit;
}

/* Loading Spinner */
.loading-spinner {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.spinner {
  border: 3px solid #f3f3f3;
  border-top: 3px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-spinner.small .spinner {
  width: 20px;
  height: 20px;
}

.loading-spinner.medium .spinner {
  width: 30px;
  height: 30px;
}

.loading-spinner.large .spinner {
  width: 40px;
  height: 40px;
}

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

/* Form Styles */
.create-post-form,
.edit-post-form,
.create-comment-form,
.edit-comment-form {
  background: white;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  border: 1px solid #e9ecef;
}

.create-post-form h2,
.create-comment-form h4 {
  margin: 0 0 1rem 0;
  color: #333;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #555;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e9ecef;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s ease;
  box-sizing: border-box;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input:disabled,
.form-group textarea:disabled {
  background: #f8f9fa;
  color: #6c757d;
}

/* Button Styles */
.submit-button,
.save-button,
.submit-comment-button,
.like-button,
.unlike-button,
.toggle-comments-button {
  background: #667eea;
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  font-weight: 500;
}

.submit-button:hover,
.save-button:hover,
.submit-comment-button:hover,
.like-button:hover,
.toggle-comments-button:hover {
  background: #5a67d8;
}

.submit-button:disabled,
.save-button:disabled,
.submit-comment-button:disabled,
.like-button:disabled {
  background: #9ca3af;
  cursor: not-allowed;
}

.cancel-button {
  background: #6c757d;
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  font-weight: 500;
}

.cancel-button:hover {
  background: #5a6268;
}

.edit-button,
.delete-button {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.edit-button:hover {
  background: rgba(102, 126, 234, 0.1);
}

.delete-button:hover {
  background: rgba(220, 53, 69, 0.1);
}

.unlike-button {
  background: #dc3545;
  margin-left: 0.5rem;
}

.unlike-button:hover {
  background: #c82333;
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* Post Styles */
.posts-list h2 {
  color: #333;
  margin-bottom: 1.5rem;
}

.posts-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  border: 1px solid #e9ecef;
  overflow: hidden;
}

.post-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1rem 1.5rem 0.5rem;
}

.post-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.username {
  font-weight: 600;
  color: #667eea;
  font-size: 1.1rem;
}

.date,
.updated {
  font-size: 0.85rem;
  color: #6c757d;
}

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

.post-content {
  padding: 0 1.5rem;
}

.post-content p {
  margin: 0.5rem 0;
  line-height: 1.6;
  color: #333;
}

.post-stats {
  padding: 0.5rem 1.5rem;
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
  color: #6c757d;
  border-top: 1px solid #f8f9fa;
}

.post-interactions {
  padding: 1rem 1.5rem;
  background: #f8f9fa;
  border-top: 1px solid #e9ecef;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.like-section {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.like-username-input {
  flex: 1;
  min-width: 0;
  padding: 0.5rem;
  border: 1px solid #e9ecef;
  border-radius: 6px;
  font-size: 0.9rem;
}

/* Comment Styles */
.comments-section {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 1rem;
  margin-top: 1rem;
}

.comments-header h3 {
  margin: 0 0 1rem 0;
  color: #333;
  font-size: 1.2rem;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.comment-card {
  background: white;
  border-radius: 8px;
  padding: 1rem;
  border: 1px solid #e9ecef;
}

.comment-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.comment-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.comment-meta .username {
  font-size: 0.95rem;
}

.comment-meta .date,
.comment-meta .updated {
  font-size: 0.8rem;
}

.comment-actions {
  display: flex;
  gap: 0.5rem;
}

.comment-content p {
  margin: 0;
  line-height: 1.5;
  color: #333;
}

.comment-username-input,
.comment-content-input,
.edit-username-input,
.edit-content-input {
  width: 100%;
  box-sizing: border-box;
}

/* Loading and Empty States */
.posts-loading,
.comments-loading {
  text-align: center;
  padding: 2rem;
  color: #6c757d;
}

.no-posts,
.no-comments {
  text-align: center;
  padding: 2rem;
  color: #6c757d;
  font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
  .app-header {
    padding: 1rem;
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .app-main {
    padding: 1rem;
  }

  .post-header,
  .comment-header {
    flex-direction: column;
    gap: 0.5rem;
  }

  .post-actions,
  .comment-actions {
    align-self: flex-end;
  }

  .like-section {
    flex-direction: column;
    align-items: stretch;
  }

  .form-actions {
    flex-direction: column;
  }
}