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

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    background: linear-gradient(135deg, blue, skyblue, blue);
    min-height: 100vh;
    margin: 0;
    width: 100%;
}
.container {
    margin-top: 20px;
    background: white;
    border-radius: 20px;
    width: 90%;
    height: auto;
}

.header {
    display: flex;
    flex-direction: column;
    max-width: 400px;
    align-items: center;
    justify-content: center;
}

.element {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    padding: 15px;
}

h1, h2 {
    color: navy;
    font-weight: bold;
    font-size: 2rem;
    text-align: center;
    margin: 0px;
    margin-top: 20px;
}
a {
    text-decoration: none;
}
.description {
    color: rgb(64,64,64);
    text-align: center;
    font-size: 1rem;
    margin:10px;
}

label{
    font-size: 1rem;
    font-weight: bold;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: rgb(32,32,32);
}
input{
    font-size: 1.2rem;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    border-radius: 5px;
    border: 1px solid gray;
    padding: 5px;
    background-color: aliceblue;
    text-align: left;
    width: 100%;
}
.btn-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding: 15px;
}
.btn-menu {
    display: grid;
    background: linear-gradient(135deg, navy, blue, navy);
    color: white;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 15px;
    width: 100%;
    height: 40px;
    align-items: center;
    justify-content: center;
    border: none;
}

.input-field { color: #000000; font-weight: 500; }
.result-field { color: #2563eb; font-weight: 700; }

.message {
    color: red;
    font-size: 0.75rem;
    display: none;
    text-align: center;
    font-style: italic;
}
.selectpi {
    font-size: 1.2rem;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    border-radius: 5px;
    border: 1px solid gray;
    padding: 5px;
    background-color: aliceblue;
    text-align: left;
    width: 100%;
    color: rgb(64,64,64);
}