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

body, html {
    height: 100%;
    font-family: Arial, sans-serif;
    overflow: hidden;
}

header {
    display: flex;
    justify-content: flex-start;
    padding: 20px;
    background-color: #f0f0f0;
}

.logo {
    height: 60px;
    width: auto;
}

main {
    display: flex;
    justify-content: center;
    align-items: center;
    height: calc(100% - 100px);
}

.container {
    display: flex;
    gap: 80px;
}

.box {
    width: 420px; /* 3 veces 140px */
    height: 420px; /* 3 veces 140px */
    background-color: #4CAF50;
    border-radius: 15px;
    text-decoration: none;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.box-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

footer {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 40px; /* Un poco más pequeño */
    background-color: #f0f0f0;
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: center;
}