@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@200&family=Roboto:wght@100&display=swap');

* { 
	box-sizing: border-box;
    margin: 0;
}

:root {
    --blue: #1e90ff;
    --white: #ffffff;
    --text: #1f2937;
    --heading: 'Nunito', sans-serif;
    --prgph: 'Roboto', sans-serif;
  }

body {
    text-align: center;
    background-image: linear-gradient(
        175deg,
        hsl(217deg 84% 55%) 9%,
        hsl(203deg 100% 48%) 52%,
        hsl(195deg 100% 46%) 79%,
        hsl(189deg 73% 53%) 100%
    );
    background-repeat: no-repeat;
    background-size: auto;
    background-attachment: fixed;
    padding: 1.7em 0;
}

#card {
    width: 33em;
    max-width: 600px;
    margin: auto;
    padding: 1em 0 0 0; 
    background: rgba( 255, 255, 255, 0.15 );
    box-shadow: 0 8px 32px 0 rgba( 31, 38, 135, 0.37 );
    backdrop-filter: blur( 10px );
    -webkit-backdrop-filter: blur( 10px );
    border-radius: 20px;
    border: 1px solid rgba( 255, 255, 255, 0.18 );
    overflow: hidden;
}

.insert {
    padding: 0.5em 3em;
}

.insert h1 {
    padding: 0.5em 0;
    text-transform: capitalize;
    font-size: 1.5rem;
    color: var(--white);
    font-family: var(--heading);
}

input[type=number] {
    background: var(--white);
    border-color: transparent;
    text-align: center;
    padding: 0.2em 0.2em;
    margin-bottom: 0.2em;
    font-size: 3rem;
    outline: transparent;
    font-weight: 700;
    color: var(--text);
    width: 100%;
    border-radius: 20px;
  }

  ::placeholder { 
    color: var(--text);
    opacity: 0.4;
  }

/* Conversion Section */
.calculation {
    background-color: var(--white);
    padding: 1.5em 1em;
}

.calculation h2 {
    padding: 0.8em 0 0.8em 0;
    font-size: 1.5rem;
    color: var(--text);
    font-family: var(--heading);
    font-weight: 800;
}

.calculation p {
    font-size: 1rem;
    font-family: var(--prgph);
    font-weight: 600;
    color: var(--text);
}

footer {
    text-align: center;
    color: var(--text);
    padding: 1em;
    font-family: var(--prgph);
    font-weight: 800;
    font-size: 1.1em;
}

/* Responsiveness */

@media screen and (max-width: 576px) {
    .insert h1 {
        font-size: 1.1rem;
    }

    .insert {
        padding: 0.3em 1.7em;
    }

    input[type=number] {
        padding: 0 0.3em;
        width: 100%;
        font-size: 2.5rem;
    }

    #card {
        width: 80%;
    }

    .calculation {
        padding: 1.2em 1em;
    }
    
    .calculation h2 {
        padding: 0.4em 0;
        font-size: 1rem;
    }
    
    .calculation p {
        font-size: 0.8rem;
        font-family: var(--prgph);
        font-weight: 600;
        padding: 0.4em 0 0.6em 0;
    }

    footer {
        font-size: 0.8em;
    }
  }

  @media screen and (max-width: 320px) {
    .insert h1 {
        font-size: 0.7rem;
    }

    .insert {
        padding: 0.3em 1.5em;
    }

    input[type=number] {
        padding: 0 0.1em;
        width: 100%;
        font-size: 1.5rem;
    }

    .calculation {
        padding: 1.1em 0.9em;
    }
    
    .calculation h2 {
        padding: 0.3em 0;
        font-size: 0.8rem;
    }
    
    .calculation p {
        font-size: 0.7rem;
        font-family: var(--prgph);
        font-weight: 600;
        padding: 0.3em 0 0.6em 0;
    }

    footer {
        font-size: 0.6em;
    }
  }