body {
   background: linear-gradient(135deg, #ffffff 0%, #666666 100%);
   min-height: 100vh;
   display: flex;
   align-items: center;
   justify-content: center;
}

.login-card {
   background: white;
   border-radius: 15px;
   box-shadow: 0 15px 35px rgba(0,0,0,0.2);
   overflow: hidden;
   width: 100%;
   max-width: 400px;
}

.login-header {
   background: linear-gradient(90deg, #000000 0%, #444444 100%);
   color: rgb(255, 255, 255);
   padding: 30px 20px;
   text-align: center;
}

.login-body {
   padding: 30px;
}

.logo-login {
   max-width: 150px;
   margin-bottom: 15px;
}

.form-control:focus {
   border-color: #000000;
   box-shadow: 0 0 0 0.25rem rgba(0, 0, 0, 0.25);
}

.btn-login {
   background: linear-gradient(90deg, #000000 0%, #444444 100%);
   border: none;
   color: rgb(255, 255, 255);
   padding: 12px;
   font-weight: 600;
}

.btn-login:hover {
   background: linear-gradient(90deg, #000000 0%, #444444 100%);
   color: rgb(255, 255, 255);
}

.link-register {
   color: #000000;
   text-decoration: none;
   font-weight: 500;
}

.email-hint {
   background: #ffffff;
   border-left: 4px solid #000000;
   padding: 10px;
   margin-bottom: 15px;
   border-radius: 4px;
   font-size: 0.9rem;
}

.email-hint i {
   color: #000000;
   margin-right: 8px;
}

.invalid-feedback {
   display: block;
}

.input-group-text {
   background-color: #f0f0f0;
   color: rgb(0, 0, 0);
   border: 1px solid #ced4da;
}