* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;

    font-family:
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
}


/* --------------------------------------------------
   Rühr-mich-nicht-an-Seite
-------------------------------------------------- */

#playground {
    width: 100%;
    height: 100vh;

    overflow: hidden;

    background: #111;

    opacity: 1;

    transition:
        opacity 0.5s ease;
}


#playground.fade-out {
    opacity: 0;
}


#parque {
    display: block;

    width: 100%;
    height: 100vh;

    object-fit: cover;

    cursor: pointer;

    -webkit-user-select: none;
    user-select: none;

    -webkit-touch-callout: none;
}


/* --------------------------------------------------
   Übersichtsseite zunächst wirklich verstecken
-------------------------------------------------- */

#overview.hidden {
    display: none;
}


/* --------------------------------------------------
   Übersichtsseite
-------------------------------------------------- */

#overview {
    width: 100%;
    height: 100vh;

    display: flex;

    align-items: center;
    justify-content: center;

    padding: 30px;

    overflow: auto;

    background:
        linear-gradient(
            rgba(10, 25, 18, 0.72),
            rgba(10, 25, 18, 0.82)
        ),
        url("../Parque_bg.jpg")
        center center / cover no-repeat;
}


.overview-box {

    width: min(850px, 100%);

    padding: 42px;

    text-align: center;

    background:
        rgba(255, 255, 255, 0.92);

    border-radius: 22px;

    box-shadow:
        0 20px 60px
        rgba(0, 0, 0, 0.35);
}


.overview-box h1 {

    margin:
        0
        0
        12px;

    font-size:
        clamp(
            2rem,
            5vw,
            3.5rem
        );

    font-weight: 600;

    letter-spacing: 0.02em;
}


.overview-box > p {

    margin:
        0
        auto
        34px;

    max-width: 600px;

    font-size: 1.1rem;

    line-height: 1.6;

    color: #444;
}


/* --------------------------------------------------
   Auswahlfelder
-------------------------------------------------- */

.choices {

    display: grid;

    grid-template-columns:
        repeat(
            2,
            minmax(0, 1fr)
        );

    gap: 20px;
}


.choice {

    display: flex;

    min-height: 180px;

    flex-direction: column;

    justify-content: center;

    padding: 30px 24px;

    text-decoration: none;

    color: #222;

    background:
        rgba(
            255,
            255,
            255,
            0.85
        );

    border:
        1px solid
        rgba(0, 0, 0, 0.12);

    border-radius: 16px;

    box-shadow:
        0 6px 18px
        rgba(0, 0, 0, 0.12);

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        background 0.2s ease;
}


.choice:hover,
.choice:focus {

    transform:
        translateY(-4px);

    background: #fff;

    box-shadow:
        0 12px 28px
        rgba(0, 0, 0, 0.18);
}


.choice-title {

    margin-bottom: 10px;

    font-size: 1.6rem;

    font-weight: 700;
}


.choice-text {

    font-size: 1rem;

    line-height: 1.45;

    color: #555;
}


/* --------------------------------------------------
   Smartphone / schmale Displays
-------------------------------------------------- */

@media (max-width: 650px) {

    #overview {
        padding: 18px;
    }

    .overview-box {
        padding: 28px 20px;
    }

    .choices {
        grid-template-columns: 1fr;
    }

    .choice {
        min-height: 130px;
    }
}