* {
    box-sizing: border-box;
}

    body {
        margin: 0;
        font-family: Arial, sans-serif;
        background-color: #f0f8f1;
        color: #26352a;
}

/* Header */

    header {
        background-color: #176b3a;
        color: white;
        text-align: center;
        padding: 35px 20px;
}

    header h1 {
        font-size: 38px;
        margin: 0;
}

    header p {
        margin-bottom: 0;
}

/* Navigation */

    nav {
        background-color: #238b4b;
        padding: 16px;
        text-align: center;
}

    nav a {
        color: white;
        text-decoration: none;
        margin: 0 15px;
        font-weight: bold;
}

    nav a:hover {
       color: #d3ffdf;
}

/* Hauptinhalt */

    main {
        max-width: 1100px;
        margin: auto;
        padding: 40px 20px;
        text-align: center;
}

    h2 {
        color: #176b3a;
        margin: 35px 0 20px;
}

    main > p {
        max-width: 750px;
        margin: 15px auto 30px;
        line-height: 1.7;
}

/* Karten */

    karten {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 20px;
        margin: 35px auto 60px;
}

    .karte {
        background-color: white;
        border: 2px solid #b6dfc2;
        border-radius: 14px;
        padding: 25px 15px;
        width: 280px;
        text-align: center;
        box-shadow: 0 4px 12px #00000012;
}

.   karte:hover {
        border-color: #238b4b;
}

.   symbol {
        font-size: 48px;
        margin-bottom: 15px;
}

.   karte h3 {
        color: #176b3a;
}

.   karte p {
        line-height: 1.6;
}

/* Tabelle */

    table {
        width: 100%;
        border-collapse: collapse;
        background-color: white;
        margin: 25px auto 50px;
}

    th {
        background-color: #176b3a;
        color: white;
        padding: 16px;
}

    td {
        padding: 18px;
        border: 1px solid #c8dfce;
        text-align: center;
}

    tr:nth-child(odd) {
        background-color: #e5f4e9;
}

    .symbol-tabelle {
        font-size: 35px;
}

/* Tipps */

    .tipps {
        background-color: white;
        border: 2px solid #b6dfc2;
        border-radius: 12px;
        padding: 20px;
        max-width: 800px;
        margin: 30px auto;
        text-align: left;
}

    .tipps p {
        line-height: 1.7;
        margin: 12px 0;
}

/* Zurück-Button */

    .zurueck {
        display: inline-block;
        background-color: #238b4b;
        color: white;
        padding: 13px 25px;
        margin-top: 25px;
        border-radius: 8px;
        text-decoration: none;
}

    zurueck:hover {
        background-color: #145c31;
}

/* Footer */

    footer {
        background-color: #176b3a;
        color: white;
        text-align: center;
        padding: 20px;
}

/* Smartphone */

    @media (max-width: 600px) {

    nav a {
        display: block;
        margin: 12px;
    }

    .karten {
        flex-direction: column;
        align-items: center;
    }

    .karte {
        width: 100%;
        max-width: 350px;
    }

    table {
        font-size: 12px;
    }

    td, th {
        padding: 8px;
    }

    .symbol-tabelle {
        font-size: 25px;
    }

    header h1 {
        font-size: 28px;
    }

    .tipps {
        padding: 15px;
    }
}