* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #1F73E0, #8E29B3);
}

.container {
    width: 350px;
    padding: 30px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.3);
    text-align: center;
}

h1 {
    color: white;
    margin-bottom: 20px;
}

input[type=number] {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border: none;
    border-radius: 8px;
    outline: none;
}

input::placeholder {
    color: #8E29B3;
}

/* Remove setinhas do input number */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield;
}

button {
    width: 100%;
    margin: 20px 0 0 0;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: #0f172a;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: #1e8fc8;
}

#resultado {
    margin-top: 15px;
    color: white;
    font-size: 18px;
    font-weight: bold;
}