body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    padding: 20px;
}

.rechner-container {
    max-width: 450px;
    margin: 0 auto;
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

h2 {
    color: #d32f2f;
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.4rem;
    text-align: center;
    border-bottom: 2px solid #f4f4f9;
    padding-bottom: 10px;
}

.section-title {
    font-weight: bold;
    color: #333;
    margin-top: 15px;
    margin-bottom: 10px;
    font-size: 1rem;
    border-left: 3px solid #d32f2f;
    padding-left: 8px;
}
select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.hidden {
    display: none;
}

.no-border {
    margin-top: 0;
    padding-left: 0;
    border-left: none;
}

.form-group {
    margin-bottom: 15px;
    max-width: 450px;
        margin: 0 auto;
        background: white;
        padding: 25px;
        border-radius: 8px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}
.hidden {
    display: none;
}
label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    font-size: 0.9rem;
}

input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 12px;
    background-color: #d32f2f;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    cursor: pointer;
    font-weight: bold;
    margin-top: 10px;
    margin-bottom: 10px;
}

button:hover {
    background-color: #b71c1c;
}

.erg-box {
    margin-top: 15px;
    padding: 15px;
    background: #f9f9f9;
    border-left: 5px solid #d32f2f;
    border-radius: 4px;
    display: none;
}

.erg-zeile {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.highlight {
    font-weight: bold;
    color: #d32f2f;
}

.gross {
    font-size: 1.05rem;
    margin-top: 8px;
}

hr {
    border: 0;
    border-top: 1px dashed #ccc;
    margin: 15px 0;
}

.hinweis {
    font-size: 0.75rem;
    color: #666;
    margin-top: 15px;
    margin-bottom: 0;
    line-height: 1.2;
}