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

body {
    background-image: url(assets/sanguinho.jpg);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #b30000;
    padding: 10px 20px;
}

main {
    background-color: white;
    padding: 30px;
    border-radius: 12px;
    width: 600px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

h1 {
    position: absolute;
    top: 20px;
    color: white;
    font-size: 28px;
    letter-spacing: 2px;
}

h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #b30000;
}

h4{
    text-align: center;
    margin-bottom: 20px;
    color: #b30000;
}

label {
    font-weight: bold;
    color: #333;
}

input, select {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border-radius: 8px;
    border: 1px solid #ccc;
    outline: none;
    transition: 0.3s;
}

button {
    width: 100%;
    margin-top: 15px;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background-color: #b30000;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}

#resultado {
    margin-top: 15px;
    font-weight: bold;
    text-align: center;
}

#sangue {
    display: block;
    width: 550px;
    height: 380px;
    justify-content: center;
}