body {
    margin: 0;
    height: 100vh;
}
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('img/back-desktop.png');
    background-size: cover;
    background-position: center bottom;
    background-repeat: no-repeat;
    z-index: -1;
}
@media (max-width: 768px) {
    body::before {
        background-image: url('img/back-mobile.png');
    }
}
/*=============================================================*/
.title-bar {
    position: fixed;
    top: 20px;
    left: 20px;
    right: 20px;

    padding: 18px 28px;

    border-radius: 16px;

    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);

    text-align: left;

    z-index: 999;

    overflow: hidden;
}

.title-bar h1 {
    margin: 0;
    color: #ffffff;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 1px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.title-bar p {
    margin: 6px 0 0 0;
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}
/*=============================================================*/
.tile-container {
    display: grid;
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 100px auto 0;
    grid-template-columns: 1fr;
}

.tile {
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 30px 20px;
    color: white;
    text-shadow: 0 2px 8px rgba(0,0,0,0.5);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tile:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.tile h3 {
    margin: 0 0 10px 0;
    font-size: 22px;
}
.tile p {
    margin: 0;
    opacity: 0.8;
    font-size: 14px;
}

@media (min-width: 768px) {
    .tile-container {
        grid-template-columns: 1fr 1fr;
    }
}