*{
    box-sizing: border-box;
    padding-top: 15px;
}

body{
    overflow: hidden;
}

.angle_triangle{
    width: 100%;
    min-height: 70vh;
}

.angle_triangle h1{
    padding: 20px;
    padding-top: 0;
    margin: 15px;
    height: auto;
}

.error{
    font-weight: bold;
    font-size: large;
}