html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}

/* Chat Styles */
.chat-container {
  max-width: 800px;
  margin: 0 auto;
}

#messagesList {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  border: 2px solid #dee2e6;
  border-radius: 15px;
  padding: 20px;
  height: 400px;
  overflow-y: auto;
  scroll-behavior: smooth;
}

#messagesList::-webkit-scrollbar {
  width: 8px;
}

#messagesList::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 10px;
}

#messagesList::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 10px;
}

#messagesList::-webkit-scrollbar-thumb:hover {
  background: #555;
}

.message-bubble {
  max-width: 50%;
  word-wrap: break-word;
  animation: fadeIn 0.3s ease-in;
}

.message-own {
  background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
  color: white;
  margin-left: auto;
  border-radius: 18px 18px 5px 18px;
}

.message-other {
  background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
  border: 1px solid #dee2e6;
  border-radius: 18px 18px 18px 5px;
}

.message-time {
  font-size: 0.75rem;
  opacity: 0.7;
}

.user-joined {
  text-align: center;
  font-style: italic;
  color: #6c757d;
  margin: 10px 0;
  padding: 5px;
  background-color: rgba(108, 117, 125, 0.1);
  border-radius: 10px;
}

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

.chat-header {
  background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
  border-radius: 15px 15px 0 0;
}

.chat-input-group {
  border-radius: 25px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.chat-input-group .form-control {
  border: none;
  padding: 12px 20px;
  font-size: 16px;
}

.chat-input-group .btn {
  border: none;
  padding: 12px 25px;
  font-weight: 600;
}

.join-form {
  max-width: 400px;
  margin: 50px auto;
  padding: 30px;
  background: white;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.chat-card {
  border: none;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  overflow: hidden;
}

/* Login Styles */
.login-card {
  background: white;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 15px 35px rgba(0,0,0,0.1);
  margin-top: 50px;
}

.login-title {
  color: #007bff;
  font-weight: 600;
  margin-bottom: 10px;
}

.login-form .input-group {
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  margin-bottom: 5px;
}

.login-form .input-group-text {
  background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
  color: white;
  border: none;
  font-size: 1.1rem;
}

.login-form .form-control {
  border: none;
  padding: 12px 15px;
  font-size: 16px;
  background-color: #f8f9fa;
}

.login-form .form-control:focus {
  background-color: white;
  box-shadow: none;
  border: 2px solid #007bff;
}

.btn-login {
  background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
  border: none;
  padding: 12px 25px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 15px;
  transition: all 0.3s ease;
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,123,255,0.4);
}

.demo-users {
  background: #f8f9fa;
  border-radius: 15px;
  padding: 15px;
  text-align: center;
}

.demo-user-list {
  background: white;
  border-radius: 10px;
  padding: 10px;
  margin-top: 10px;
}

.access-denied-card {
  background: white;
  border-radius: 20px;
  padding: 50px 30px;
  box-shadow: 0 15px 35px rgba(0,0,0,0.1);
  margin-top: 100px;
}

/* Form validation styles */
.text-danger {
  font-size: 0.875rem;
  margin-top: 5px;
}

.form-check-label {
  margin-right: 5px;
}

/* File Message Styles */
.file-message {
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 10px;
  padding: 15px;
  margin-top: 8px;
}

.file-info {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

.file-icon {
  font-size: 2rem;
  margin-left: 10px;
}

.file-details {
  flex: 1;
}

.file-name {
  font-weight: 600;
  color: #495057;
  margin-bottom: 2px;
  word-break: break-all;
}

.file-size {
  font-size: 0.875rem;
  color: #6c757d;
}

.file-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.file-actions .btn {
  font-size: 0.875rem;
  padding: 4px 8px;
}

/* Upload Progress Styles */
#uploadProgress {
  background: #f8f9fa;
  border-radius: 10px;
  padding: 10px;
  border: 1px solid #e9ecef;
}

#uploadProgress .progress {
  height: 8px;
  border-radius: 4px;
  margin-bottom: 5px;
}

#uploadProgress .progress-bar {
  background: linear-gradient(90deg, #007bff, #0056b3);
}

/* File Button Styles */
#fileButton {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: none;
}

#fileButton:hover {
  background-color: #6c757d;
  border-color: #6c757d;
}

/* Message Actions Styles */
.message-actions {
  display: flex;
  gap: 5px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.message-bubble:hover .message-actions {
  opacity: 1;
}

.message-actions .btn {
  padding: 2px 6px;
  font-size: 0.75rem;
  border-radius: 4px;
  min-width: auto;
}

.message-actions .edit-message {
  background-color: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
  color: white;
}

.message-actions .delete-message {
  background-color: rgba(220, 53, 69, 0.8);
  border-color: rgba(220, 53, 69, 0.9);
  color: white;
}

.message-actions .edit-message:hover {
  background-color: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
}

.message-actions .delete-message:hover {
  background-color: rgba(220, 53, 69, 1);
  border-color: rgba(220, 53, 69, 1);
}

/* For message-other (other users' messages) */
.message-other .message-actions .edit-message {
  background-color: rgba(0, 123, 255, 0.1);
  border-color: rgba(0, 123, 255, 0.2);
  color: #007bff;
}

.message-other .message-actions .delete-message {
  background-color: rgba(220, 53, 69, 0.1);
  border-color: rgba(220, 53, 69, 0.2);
  color: #dc3545;
}

.message-other .message-actions .edit-message:hover {
  background-color: rgba(0, 123, 255, 0.2);
  border-color: rgba(0, 123, 255, 0.3);
}

.message-other .message-actions .delete-message:hover {
  background-color: rgba(220, 53, 69, 0.2);
  border-color: rgba(220, 53, 69, 0.3);
}

/* Responsive file message */
@media (max-width: 576px) {
  .file-actions {
    flex-direction: column;
  }
  
  .file-actions .btn {
    width: 100%;
    margin-bottom: 5px;
  }
  
  .file-info {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .file-icon {
    margin-left: 0;
    margin-bottom: 5px;
  }
  
  .message-actions {
    opacity: 1; /* Always show on mobile */
  }
}