body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #333;
}

.container {
    width: 90%;
    max-width: 600px;
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

h4 {
    text-align: center;
    color: #bec2c7;
    margin-bottom: 1.5rem;
}

.app {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

input {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

button {
    padding: 0.8rem;
    background-color: #16e0e7;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

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

button:disabled {
    background-color: #c5b9c1;
    cursor: not-allowed;
}

.qr-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

#qr-code {
    width: 300px;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px dashed #ddd;
    border-radius: 10px;
}

#error-message {
    color: #e74c3c;
    text-align: center;
    min-height: 1.5rem;
}

li {
  display: inline; /* atau 'inline-block' jika ingin mengatur padding/margin */
  margin-right: 10px; /* jarak antar item */
}