/* Allgemeine Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 650px;
    margin: 0 auto;
    padding: 20px;
    line-height: 1.6;
    color: #333;
}

.container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Header & Sprachauswahl */
header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 20px;
}

h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 20px;
}

.language-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.lang-btn {
    background-color: #ecf0f1;
    color: #34495e;
    border: 1px solid #bdc3c7;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.lang-btn:hover {
    background-color: #d6dcde;
}

.lang-btn.active {
    background-color: #3498db;
    color: white;
    border-color: #2980b9;
}

/* Hauptrechner */
.calculator {
    background-color: #f8f9fa;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 18px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    transition: border 0.3s ease;
}

input:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.5);
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    display: block;
    width: 100%;
    margin-top: 15px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #2980b9;
}

/* Ergebnisbereich */
.result {
    margin-top: 20px;
    background-color: #e8f4fc;
    padding: 20px;
    border-radius: 8px;
    display: none;
    border-left: 5px solid #3498db;
}

.result h3 {
    color: #2980b9;
    margin-top: 0;
}

/* Info-Box */
.info-box {
    background-color: #f2fafe;
    border-radius: 8px;
    padding: 20px;
    border-left: 5px solid #2980b9;
}

.info-box h3 {
    color: #2980b9;
    margin-top: 0;
}

.info-box ul {
    padding-left: 20px;
}

.info-box li {
    margin-bottom: 10px;
}

/* Responsive Design */
@media (max-width: 600px) {
    body {
        padding: 15px;
    }
    
    .calculator {
        padding: 20px;
    }
    
    input, button {
        font-size: 14px;
    }
    
    .language-selector {
        flex-wrap: wrap;
    }
}