* {
    font-family: 'Exo 2', sans-serif;
    margin: 0;
    padding: 0;
}

body {
background: #f5fff5;
}
.intro {
    background: linear-gradient(180deg, #303F9F 50%, #f5fff5 150%);
    height: 100vh;
    overflow-y: auto;
    position: absolute;
    width: 100vw;
}
.intro_wrapper {
    margin-top: 50px;
    align-items: center;
    display: grid;
    place-items: center;
}
.intro_wrapper button {
    background-color: hsl(214, 73%, 19%);
    box-shadow: 0 0 5px 1px rgba(255, 255, 255, 0.203);
    font-size: 20px;
    height: 100px;
    max-width: 450px;
    padding: 10px 20px;
    width: 90%;
    margin-bottom: 20px;
}

h1, h2 {
    background-color: #303F9F;
    color: #E3F2FD;
    font-family: 'Varela Round', sans-serif;  
    padding:5%;
    text-align:center;
}
h1 {
    letter-spacing: 0.3ch;
    margin: 0;
    padding:60px;
    text-align: center;
    text-transform: uppercase;
}
h2 {
    border-radius: 8px;
    margin-bottom: 30px;
}

h1:hover, h2:hover, p:hover {
    cursor: default;
}
section {
    align-content: center;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.279);
    display: flex;
    flex-flow: column wrap;
    padding: 25px;
    width: 300px;
}
section > * {
    margin-bottom: 8px;
}
section p {
    font-weight: 500;
    padding: 3px 4px;
    text-align: center;
}
section h2 {
    margin-bottom: 20px;
}
.wrapper {
    display:flex;
    flex-flow: row wrap;
    gap: 50px;
    justify-content: space-evenly;
    padding: 10px;
}

button {
    background-color: #303F9F;  
    border: 1px solid transparent;
    border-radius: 4px;
    color: #E3F2FD;
    font-size: 16px;
    padding: 4px 0;
    transition: all 0.6s ease-out;
}
#mode3_check {
    flex-shrink: 0;
    width: 5rem;
}
#mode1_reset, #mode2_reset, #mode3_reset {
    margin-top:auto;
} 

fieldset {
    border: none;
    padding: 5px;
}

section > label {
    background: #303F9F;
    -webkit-clip-path: polygon(0 0,100% 0,100% calc(100% - 30.00px),calc(100% - 20.00px) 100%,0 100%);
            clip-path: polygon(0 0,100% 0,100% calc(100% - 30.00px),calc(100% - 20.00px) 100%,0 100%);
    color: #fff;
    left: -20px;
    margin-right: 50px;
    padding: 5px 10px ;
    position: relative;
    width:80%;
}

sub {
    letter-spacing: normal;
    position: relative;
    -webkit-text-decoration: underline #5f71e7;
            text-decoration: underline #5f71e7;
    top: 80px;
}

fieldset legend {
    background: #303F9F;
    -webkit-clip-path: polygon(0 0,100% 0,100% calc(100% - 30.00px),calc(100% - 20.00px) 100%,0 100%);
            clip-path: polygon(0 0,100% 0,100% calc(100% - 30.00px),calc(100% - 20.00px) 100%,0 100%);
    color: #fff;
    display:inline;
    left: -25px;
    padding: 5px 10px ;
    position: relative;
    width:80%;
}

button:hover {
    background-color: #5f71e7;
    cursor:pointer;
}

button:disabled {
    background-color: #58585a;
    color: #a9a9a9;
    cursor:not-allowed;
}

input:disabled {
    background-color: #bdbdbd7d;
}

.hidden {
    color: white;
    visibility:hidden;
}

.correct {
    background-color: #81C784;
    border-radius: 4px;
    transition: all 1.6s ease-out;
}

.disabled {
    display:none;
}

input {
    border: 2px solid #5f71e7;
    border-radius: 4px;
    font-size: 16px;
    padding: 1px 5px;
}

input[type="number"]:focus {
    border: 2px solid #303F9F;
    border-radius: 4px;
    outline: none;
}
.refresh {
    color:rgba(255, 255, 255, 0.628);
    left: 10px;
    position: relative;
    top: -25px;
}

.refresh:hover {
    color:white;
    cursor: pointer;
}
@media (max-width: 552px) {
    h1 {
        font-size: 24px;
    }
    .intro button {
        height: 80px !important;      
    }

    fieldset legend {
        left: -8.5% !important;
    }
    section > label {
        left: -6.8% !important;
    }
}

@media (max-width: 374px) {
    h1 {
        font-size: 24px;
        letter-spacing: normal;
    }
    .intro button {
        height: 80px !important;      
    }

    fieldset legend {
        left: -3% !important;
        width: 80% !important;
    }
    section > label {
        left: -1% !important;
        width: 90% !important;
    }
}