/* カスタムスタイル */
.post-card {
  transition: all 0.3s ease;
}

.post-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-color: #e5e7eb;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: #f3f4f6;
  color: #374151;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background: #e5e7eb;
  color: #111827;
}

.textarea-custom {
  resize: vertical;
  min-height: 80px;
  max-height: 200px;
}

.avatar-sm {
  width: 40px;
  height: 40px;
}

.avatar-md {
  width: 60px;
  height: 60px;
}

.avatar-lg {
  width: 120px;
  height: 120px;
}

.navbar-shadow {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.modal-backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

.loading-spinner {
  border: 2px solid #f3f3f3;
  border-top: 2px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  min-width: 300px;
  transform: translateX(400px);
  transition: transform 0.3s ease;
}

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

.like-btn.liked {
  color: #ef4444;
}

.follow-btn.following {
  background: #10b981;
  color: white;
}

.follow-btn.following:hover {
  background: #059669;
}