body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #001122 0%, #003366 50%, #001122 100%);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.login-box {
    width: 400px;
    background: white;
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    animation: slideIn 0.8s ease-out;
}

@keyframes slideIn {
    from { 
        opacity: 0; 
        transform: translateY(-50px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #003366;
    font-size: 28px;
    font-weight: bold;
}

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

.form-group input {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

.form-group input:focus {
    outline: none;
    border-color: #003366;
    box-shadow: 0 0 5px rgba(0, 51, 102, 0.3);
}

.login-box button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #003366, #005599);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.login-box button:hover {
    background: linear-gradient(135deg, #005599, #0077cc);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 51, 102, 0.4);
}

.login-box button:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.error-message {
    color: #d9534f;
    margin-bottom: 15px;
    text-align: center;
    background: #f8d7da;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #f5c6cb;
    display: none;
}

.success-message {
    color: #155724;
    margin-bottom: 15px;
    text-align: center;
    background: #d4edda;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #c3e6cb;
    display: none;
}