* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #0a0a2a, #1a1a4a);
    color: #e0f0ff;
    min-height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Language Selector */
.language-selector {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 100;
    display: flex;
    gap: 10px;
}

/* GitHub Link */
.github-link {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(20, 25, 50, 0.8);
    border: 1px solid rgba(100, 180, 255, 0.3);
    border-radius: 8px;
    color: #e0f0ff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.github-link:hover {
    background: rgba(79, 172, 254, 0.2);
    border-color: #4facfe;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
    color: #4facfe;
}

.github-link svg {
    transition: transform 0.3s ease;
}

.github-link:hover svg {
    transform: scale(1.1);
}

.language-flag {
    width: 40px;
    height: 30px;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s ease;
    background-size: cover;
    background-position: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.language-flag:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.5);
}

.language-flag.active {
    box-shadow: 0 0 15px rgba(79, 172, 254, 0.8);
}

.flag-it {
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIGlkPSJmbGFnLWljb25zLWl0IiB2aWV3Qm94PSIwIDAgNjQwIDQ4MCI+IDxnIGZpbGwtcnVsZT0iZXZlbm9kZCIgc3Ryb2tlLXdpZHRoPSIxcHQiPiA8cGF0aCBmaWxsPSIjZmZmIiBkPSJNMCAwaDY0MHY0ODBIMHoiLz4gPHBhdGggZmlsbD0iIzAwOTI0NiIgZD0iTTAgMGgyMTMuM3Y0ODBIMHoiLz4gPHBhdGggZmlsbD0iI2NlMmIzNyIgZD0iTTQyNi43IDBINjQwdjQ4MEg0MjYuN3oiLz4gPC9nPiA8L3N2Zz4=');
}

.flag-en {
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIGlkPSJmbGFnLWljb25zLWdiIiB2aWV3Qm94PSIwIDAgNjQwIDQ4MCI+IDxwYXRoIGZpbGw9IiMwMTIxNjkiIGQ9Ik0wIDBoNjQwdjQ4MEgweiIvPiA8cGF0aCBmaWxsPSIjRkZGIiBkPSJtNzUgMCAyNDQgMTgxTDU2MiAwaDc4djYyTDQwMCAyNDFsMjQwIDE3OHY2MWgtODBMMzIwIDMwMSA4MSA0ODBIMHYtNjBsMjM5LTE3OEwwIDY0VjB6Ii8+IDxwYXRoIGZpbGw9IiNDODEwMkUiIGQ9Im00MjQgMjgxIDIxNiAxNTl2NDBMMzY5IDI4MXptLTE4NCAyMCA2IDM1TDU0IDQ4MEgwek02NDAgMHYzTDM5MSAxOTFsMi00NEw1OTAgMHpNMCAwbDIzOSAxNzZoLTYwTDAgNDJ6Ii8+IDxwYXRoIGZpbGw9IiNGRkYiIGQ9Ik0yNDEgMHY0ODBoMTYwVjB6TTAgMTYwdjE2MGg2NDBWMTYweiIvPiA8cGF0aCBmaWxsPSIjQzgxMDJFIiBkPSJNMCAxOTN2OTZoNjQwdi05NnpNMjczIDB2NDgwaDk2VjB6Ii8+IDwvc3ZnPg==');
}

/* Effetto stelle */
#stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.star {
    position: absolute;
    background: white;
    border-radius: 50%;
    animation: twinkle var(--duration) infinite ease-in-out;
}

/* Header */
header {
    text-align: center;
    padding: 20px;
    background: rgba(10, 15, 30, 0.7);
    border-bottom: 1px solid rgba(100, 180, 255, 0.3);
    position: relative;
    z-index: 10;
    backdrop-filter: blur(5px);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(90deg, #4facfe, #00f2fe);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 15px rgba(79, 172, 254, 0.5);
}

/* Contenitore principale */
.container {
    display: flex;
    height: calc(100vh - 120px);
}

/* Sistema solare 3D */
#solarSystem {
    flex: 1;
    position: relative;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #4facfe;
    border-bottom: 1px solid rgba(100, 180, 255, 0.3);
    padding-bottom: 10px;
}

.info-panel {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: rgba(20, 25, 50, 0.8);
    border: 1px solid rgba(100, 180, 255, 0.3);
    padding: 15px;
    border-radius: 10px;
    max-width: 300px;
    backdrop-filter: blur(5px);
    z-index: 10;
}

.info-panel h3 {
    color: #4facfe;
    margin-bottom: 10px;
    border-bottom: 1px solid rgba(100, 180, 255, 0.3);
    padding-bottom: 5px;
}

.info-panel h4 {
    color:#fff;
    margin-bottom: 5px;
    padding-bottom: 5px;
    border-bottom: 0; 
}

/* Animazioni */
@keyframes sun-pulse {
    0% { box-shadow: 0 0 50px #ff8c00, 0 0 100px rgba(255, 140, 0, 0.5); }
    100% { box-shadow: 0 0 70px #ff8c00, 0 0 140px rgba(255, 140, 0, 0.7); }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}


/* Responsive */
@media (max-width: 900px) {
    .container {
        flex-direction: column;
    }
    .control-panel {
        width: 100%;
        height: 300px;
        border-left: none;
        border-top: 1px solid rgba(100, 180, 255, 0.3);
    }
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}