body {
    background: #f0f2f5;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}
.login-container {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    box-sizing: border-box;
}
.login-container img {
    display: block;
    max-width: 320px;
    height: auto;
    margin: 0 auto 25px auto;
}
label {
    display: block;
    margin-bottom: 10px;
    color: #444;
    font-weight: bold;
}
input[type="email"], input[type="password"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 15px;
    box-sizing: border-box;
}
button, .register-button {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    border-radius: 6px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    margin-bottom: 12px;
    box-sizing: border-box;
}
button {
    background: #007bff;
    color: #fff;
    border: none;
    cursor: pointer;
}
button:hover { background: #0056b3; }
.register-button {
    background: #28a745;
    color: #fff;
}
.register-button:hover { background: #218838; }
.message {
    padding: 12px;
    border-radius: 6px;
    font-size: 15px;
    margin-bottom: 20px;
    text-align: center;
}
.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}
.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}