body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "San Francisco", Arial, sans-serif;
    background: #f5f5f7;

    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background: white;
    padding: 20px;
    border-radius: 16px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

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

.input-area {
    display: flex;
    gap: 10px;
    /* espaçamento automático entre input e botão */
}

input {
    flex: 1;
    /* faz o input ocupar todo espaço disponível */
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #ddd;
}

button {
    padding: 10px 14px;
    border: none;
    border-radius: 10px;
    background: #0071e3;
    color: white;
    cursor: pointer;
}

button:hover {
    background: #005bb5;
}

ul {
    list-style: none;
    padding: 0;
    margin-top: 20px;
}

li {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    border-bottom: 1px solid #eee;
}

li button {
    background: #ff3b30;
}

.clear-btn {
    width: 100%;
    margin-top: 15px;
    background: #555;
}

@media (max-width: 500px) {
    .container {
        padding: 15px;
    }
}