/* Resetta margini e padding */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Sfondo con gradient animato */
body {
    height: 100vh;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(-45deg, #6a0dad, #8a2be2, #4b0082, #9370db);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

/* Animazione gradient */
@keyframes gradientBG {
    0% {background-position: 0% 50%;}
    50% {background-position: 100% 50%;}
    100% {background-position: 0% 50%;}
}

/* Box centrale del login */
.login-container {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 35px 30px;
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.login-container:hover {
    transform: translateY(-5px);