/* Modern styling for Chat IO */
body {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
}

h1.text-center {
  color: #333;
  font-weight: 300;
  margin-bottom: 1.5rem;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.container {
  padding: 2%;
}

.card {
  border: none;
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.85); /* Glassmorphism effect */
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
}

.card-header {
  background-color: transparent;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  padding: 1.5rem 1rem;
}

.card-header h2 {
  font-size: 1.75rem;
  font-weight: 600;
  color: #444;
}

/* Chat window */
#chatWindow {
  height: 350px;
  overflow-y: auto;
  padding: 1rem;
  background-color: rgba(249, 249, 249, 0.5);
  border-radius: 10px;
  margin-bottom: 1rem;
  scrollbar-width: thin;
}

#chatWindow::-webkit-scrollbar {
  width: 6px;
}
#chatWindow::-webkit-scrollbar-thumb {
  background-color: #ccc;
  border-radius: 3px;
}

/* Chat Bubbles */
#chatWindow p {
  border-radius: 1.15rem;
  line-height: 1.4;
  max-width: 80%;
  padding: 0.6rem 1rem;
  position: relative;
  word-wrap: break-word;
  margin: 0.5rem 0;
  font-size: 0.95rem;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

p.from-me {
  align-self: flex-end;
  background: linear-gradient(
    135deg,
    #248bf5,
    #0069c0
  ); /* Improved blue gradient */
  color: #fff;
  float: right;
  clear: both;
  border-bottom-right-radius: 0.2rem !important;
}

p.from-them {
  background: #ffffff;
  color: #333;
  float: left;
  clear: both;
  border-bottom-left-radius: 0.2rem !important;
}

/* Usernames in chat */
p.from-them span strong {
  font-size: 0.85rem;
  display: block;
  margin-bottom: 0.2rem;
}

/* Input Fields & Buttons */
.form-control {
  border-radius: 20px;
  padding: 0.6rem 1.2rem;
  border: 1px solid #ddd;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.form-control:focus {
  box-shadow: 0 0 0 3px rgba(36, 139, 245, 0.25);
  border-color: #248bf5;
}

.btn-primary {
  border-radius: 20px;
  padding: 0.6rem 1.5rem;
  background: linear-gradient(135deg, #248bf5, #0069c0);
  border: none;
  box-shadow: 0 4px 6px rgba(36, 139, 245, 0.3);
  transition: all 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 8px rgba(36, 139, 245, 0.4);
}

/* Helper texts */
#typing {
  font-style: italic;
  color: #777;
  font-size: 0.9rem;
  min-height: 1.5rem;
}

#error,
#errors {
  color: #dc3545;
  font-weight: 500;
}

/* User List */
#usersList {
  font-size: 0.95rem;
  padding: 0.5rem;
}

#usersList br {
  display: block;
  content: "";
  margin-top: 5px;
}