body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto;
    background: #0f1117;
    color: #fff;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 500px;
    margin: auto;
    padding: 20px;
}

/* Titel */
h1 {
    text-align: center;
    margin-bottom: 20px;
}

/* Karten */
.card {
    background: #1c1f26;
    padding: 15px;
    margin: 10px 0;
    border-radius: 16px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    animation: fadeIn 0.4s ease;
}

/* Inputs */
input, select {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: none;
    background: #2b2f38;
    color: #fff;
    margin-top: 5px;
    margin-bottom: 10px;
}

/* Buttons */
button {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: #000;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s;
}

button:hover {
    transform: scale(1.03);
}

/* Back Button */
a button {
    margin-top: 15px;
    background: #444;
    color: white;
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Highlight Betrag */
.amount {
    font-size: 26px;
    font-weight: bold;
    color: #00f2fe;
}

/* Überschriften */
h3 {
    margin: 0 0 5px 0;
}