.chat-header {
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
}

.chat-input {
  border-bottom-left-radius: 20px;
  border-bottom-right-radius: 20px;
}

.login-container {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-box {
  width: 90%;
  max-width: 400px;
  padding: 40px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.login-box h2 {
  margin-bottom: 20px;
  text-align: center;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  opacity: 0.8;
}

.form-group input {
  width: 100%;
}

.error-message {
  background: rgba(215, 1, 52, 0.2);
  color: #ff4d4d;
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.85rem;
  text-align: center;
  border: 1px solid rgba(215, 1, 52, 0.3);
}

.login-button {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
}

.lang-toggle {
  position: absolute;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 100;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.8rem;
  transition: all 0.3s ease;
}

.lang-toggle:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-50%) scale(1.1);
}

.lang-toggle {
  top: 50%;
  transform: translateY(-50%);
}

[dir="rtl"] .lang-toggle {
  left: auto;
  right: 20px;
}

.logout-link {
  position: absolute;
  top: 15px;
  right: 20px;
  color: var(--primary);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all 0.3s ease;
}

.logout-link:hover {
  opacity: 0.8;
  transform: scale(1.05);
}

[dir="rtl"] .logout-link {
  right: auto;
  left: 20px;
}

@media screen and (max-width: 500px) {
  .chat-header h1 {
    margin-top: 30px;
  }
}