body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.login-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-logo {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: #6c757d;
    font-size: 16px;
    margin: 0;
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-control {
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 15px 20px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    background: white;
}

.input-group {
    border-radius: 10px;
    overflow: hidden;
}

.input-group-text {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-right: none;
    color: #6c757d;
    font-size: 16px;
    padding: 15px 20px;
    transition: all 0.3s ease;
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 10px 10px 0;
}

.input-group:focus-within .input-group-text {
    background: #667eea;
    border-color: #667eea;
    color: white;
}

.input-group:focus-within .form-control {
    border-color: #667eea;
}

.form-check {
    margin-bottom: 25px;
}

.form-check-input:checked {
    background-color: #667eea;
    border-color: #667eea;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    border-radius: 10px;
    padding: 15px;
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-block {
    margin-top: 10px;
}

.text-danger {
    font-size: 14px;
    margin-top: 8px;
    display: block;
    color: #dc3545;
}

.alert {
    border-radius: 10px;
    border: none;
    margin-bottom: 25px;
}

.alert-danger {
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: white;
}

.text-center a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.text-center a:hover {
    color: #764ba2;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 576px) {
    .container {
        padding: 10px;
    }
    
    .login-container {
        padding: 30px 20px;
    }
    
    .login-logo {
        font-size: 28px;
    }
}