body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #c0c0c0;
    background: url('img/tag.jpg') no-repeat center center fixed;
    background-size: cover;
    transition: background 0.5s ease;
}

.transition-fast {
    transition: background 1s ease; /* schnellerer Übergang von  bank zu gang */
}

.transition-slow {
    transition: background 2.5s ease; /* Langsamer Übergang für gang zu bank */
}

body.night {
    background: url('img/nacht.jpg') no-repeat center center fixed;
    background-size: cover;
}

.container {
    background: white;
    padding: 50px;
    border-radius: 30px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.input-group {
    margin-bottom: 15px;
    text-align: center;
    padding-bottom: 20px;
    font-size: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    padding-bottom: 5px;
    text-align: center;
}

.input-group input {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 20px;
    text-align: center;
}

/* input text size */
.input-group input::placeholder {
    font-size: 12px; /* kleinerer text vom input feld */
    text-align: center; /* text zentriert */
}

button {
    padding: 10px 20px;
    background: #00b7eb;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 20px;
}

button:hover {
    background: #00ced1;
}

#result {
    margin-top: 20px;
    text-align: left;
}

.hh {
    margin-top: 20px;
    text-align: center;
}