body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #fff;
    color: #333;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    background: transparent;
    padding: 20px;
    border-radius: 8px;
    box-shadow: none;
    max-width: 100%;
}

button {
    background-color: #5c67f2;
    color: white;
    text-transform: uppercase;
    font-weight: bold;
    width: 33%;
}

button:hover {
    background-color: #4a54e1;
}

#lifeGridContainer {
    margin-top: 20px;
    padding: 10px;
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

#lifeGrid {
    display: grid;
    gap: 2px;
    justify-content: center;
    grid-template-columns: repeat(52, 12px);
}

.grid-item {
    background-color: #ffffff;
    border: 1px solid #000000;
    position: relative;
    font-size: 10px;
    width: 12px;
    height: 12px;
}

.grid-item.months {
    font-size: 8px;
}

.grid-label {
    text-align: right;
    padding-right: 5px;
    font-size: 10px;
    line-height: 10px;
}

.filled {
    background-color: #4a4a4a;
}

@media (max-width: 768px) {
    .grid-item {
        width: 10px;
        height: 10px;
    }
}

@media (max-width: 480px) {
    .grid-item {
        width: 8px;
        height: 8px;
    }
}