.sparren-glas-rechner {
    max-width: 800px;
    margin: 0 auto;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.sparren-glas-rechner h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    font-size: 28px;
    font-weight: 600;
}

.rechner-form {
    display: grid;
    gap: 20px;
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 500;
    color: #34495e;
    font-size: 15px;
}

.form-group input {
    padding: 12px 15px;
    border: 2px solid #dfe6e9;
    border-radius: 6px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: white;
}

.form-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group input::placeholder {
    color: #95a5a6;
}

#srNoticeWrapper {
    margin-top: 30px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

#srNoticeWrapper.error {
    background: #fee;
    border: 2px solid #e74c3c;
}

.sparren-rechner-placeholder {
    text-align: center;
    color: #7f8c8d;
    font-style: italic;
    padding: 40px 20px;
}

.sparren-rechner-error {
    color: #c0392b;
    font-weight: 500;
    line-height: 1.6;
}

.calculation-result h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 22px;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #3498db;
}

.result-item.full-width {
    grid-column: 1 / -1;
}

.result-item .label {
    font-weight: 500;
    color: #34495e;
}

.result-item .value {
    font-weight: 600;
    color: #2c3e50;
    font-size: 16px;
}

#srDownloadPdfBtn {
    display: none;
    margin: 20px auto 0;
    padding: 12px 30px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.3);
}

#srDownloadPdfBtn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

#srDownloadPdfBtn:active {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .sparren-glas-rechner {
        padding: 20px;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .sparren-glas-rechner h2 {
        font-size: 24px;
    }
}