body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f7f7f7;
    color: #222;
}
section {
    padding: 60px 20px;
}
.landing {
    display: grid;
    grid-template-columns: 1fr 1fr;
    height: 100vh;
}
.intro {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    background: url('picture.jpg') center/cover no-repeat;
    padding: 0;
    color: #fff;
    height: 100%;
}
.intro-overlay {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    text-align: center;
    padding-top: 20px;
    padding-bottom: 20px;
}
.intro-overlay h1 {
    font-size: 2rem;
    margin: 0;
}
.intro-overlay p {
    margin: 5px 0 0;
    font-size: 1rem;
}
.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 20px;
    padding: 40px;
    background: #e5e7eb;
}
.tile {
    background: #fff;
    border-radius: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
}
.tile .desc {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.85);
    color: #fff;
    border-radius: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s;
}
.tile:hover .desc {
    opacity: 1;
}
.tile:active .desc {
    opacity: 0;
}
.timeline {
    max-width: 700px;
    margin: auto;
}
.timeline-entry {
    border-left: 4px solid #111;
    padding-left: 15px;
    margin-bottom: 30px;
}
.timeline-entry h3 {
    margin: 0;
}
footer {
    background: #111;
    color: #fff;
    text-align: center;
    padding: 40px 20px;
}
footer a {
    color: #fff;
    margin: 0 10px;
    text-decoration: none;
    transition: color 0.3s;
}
footer a:hover {
    color: #aaa;
}
p {
    max-width: 800px;
    margin: auto;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .landing {
        grid-template-columns: 1fr;
        height: auto;
    }
    .intro {
        height: 50vh;
    }
    .grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        padding: 20px;
    }
    .tile {
        font-size: 1.2rem;
        min-height: 50px;
    }
    .timeline {
        max-width: 100%;
    }
    header {
        padding: 30px 0;
        font-size: 2rem;
    }
    section {
        padding: 40px 10px;
    }
    footer {
        padding: 20px 10px;
    }
}

@media (hover: none) and (pointer: coarse) {
    .tile:hover .desc {
        opacity: 0;
    }
    .tile {
        transition: none;
    }
}