body {
    background-image: url('football_field_background.jpg');
    background-size: cover;
    color: #ffffff;
    font-family: 'Arial', sans-serif;
}

.container {
    background: rgba(0, 0, 0, 0.7);
    padding: 20px;
    border-radius: 10px;
    max-width: 600px;
    margin: 20px auto;
    box-shadow: 0px 0px 15px 2px rgba(0, 0, 0, 0.5);
}

button {
    background-color: #28a745;
    color: white;
    border: none;
    padding: 10px 20px;
    margin-top: 15px;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #218838;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 2px solid #ffffff;
    border-radius: 5px;
    background-color: rgba(255, 255, 255, 0.8);
}

h1,
h2 {
    text-align: center;
    color: #f5c518;
}

.header-logo {
    display: block;
    margin: 0 auto;
    width: 150px;
    height: auto;
}

.footer {
    text-align: center;
    color: #ffffff;
    margin-top: 20px;
}

.flash-success {
    background-color: #28a745;
    color: white;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.flash-error {
    background-color: #dc3545;
    color: white;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
}