* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    background-color: #f7f7f4;
    color: #111;
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
}

.header {
    text-align: center;
}

.title {
    margin-bottom: 24px;
    font-size: 42px;
    font-weight: 700;
    letter-spacing: 1px;
}

button {
    padding: 10px 18px;
    background-color: #111;
    color: #fff;
    border: 1px solid #111;
    border-radius: 999px;
    margin: 0 6px;
    cursor: pointer;
    font: inherit;
    transition: background-color 0.2s ease, color 0.2s ease;
}

button:hover {
    background-color: #fff;
    color: #111;
}

.grid {
    box-sizing: content-box;
    width: 600px;
    height: 600px;
    display: flex;
    flex-wrap: wrap;
    background-color: #fff;
    border: 2px solid #111;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
}