* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    color: #e6edf3;
    overflow-x: hidden;
    position: relative;
}
#grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    display: grid;
    grid-template-columns: repeat(auto-fill, 40px);
    grid-template-rows: repeat(auto-fill, 40px);
    background: #0a0a0f;
}
.square {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(123, 47, 255, 0.15);
    transition: background-color 0.5s ease;
}
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    position: flex;
    z-index: 1;
    text-align: center;
    align-items: center;
    flex-direction: column;
}
header {
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 80px 20px 60px;
    margin-bottom: 60px;
}
footer {
    border-top: 1px solid #0d1b2a;
    padding: 30px 20px;
    text-align: center;
    color: #8b949e;
    font-size: 14px;
    margin-top: 60px;
}
a {
    color: #00ff88;
    text-decoration: none;
}
a:visited {
    color: #7b2fff;
}
a:hover {
    color: #5f3ac5;
    cursor: crosshair;
    text-decoration: line-through;
}
a:active {
    color: #a855f7;
}
a:focus {
    color: #00ff88;
    outline: 2px solid #00ff88;
    outline-offset: 2px;
}