body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: linear-gradient(135deg, #f06, #00f);
    color: #fff;
}

h1 {
    margin-top: 30px;
    font-size: 2.5em;
}

h2 {
    margin-top: 20px;
    font-size: 1.8em;
}

#app {
    margin-top: 20px;
    width: 90%;
    max-width: 600px;
    background-color: rgba(255, 255, 255, 0.8);
    color: #333;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

input, button, select {
    margin: 10px 0;
    padding: 12px;
    width: 100%;
    box-sizing: border-box;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 1em;
}

button {
    background-color: #007BFF;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}

ul {
    list-style-type: none;
    padding: 0;
    margin-top: 20px;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

li {
    margin: 10px 0;
    padding: 10px;
    background-color: rgba(233, 233, 233, 0.9);
    border-radius: 5px;
    border: 1px solid #ccc;
}

input::placeholder, select::placeholder {
    color: #aaa;
}
