* {
    margin: 0;
    padding: 0;
}

@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400&display=swap');

.btn {
    width: 50px;
    height: 50px;
    font-size: 25px;
    margin: 2px;
    cursor: pointer;
    background: rgba(66, 133, 241, 0.7);
    color: white;
    border: 0.5px solid rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    outline: none;
}

.btn:hover {
    background: #4285F1;
    border: 0.5px solid rgba(250, 250, 250, 0.1);
}

.calci-display {
    width: 195px;
    margin: 5px;
    margin-bottom: 20px ;
    font-size: 25px;
    padding: 10px;
    border: 0.5px solid rgba(0, 0, 0, 0.1);
    color: #2A485D;
    background-color: #E8E8EA;
    border-radius: 5px;
}

.zero-btn {
    width: 106px;
    background: rgba(244, 180, 41, 0.8);
}

.equal-btn {
    height: 106px;
    background: rgba(244, 180, 41, 0.8);
}

.zero-btn:hover, .equal-btn:hover {
    background: #F4B429;
}

.alt-btn {
    background: rgba(22, 157, 92, 0.8);
}

.alt-btn:hover {
    background: #169D5C;
}

.danger-btn {
    background: rgba(218, 69, 59, 0.8);
    text-transform: uppercase;
    font-size: 20px;
}

.danger-btn:hover {
    background: #DA453B;
}

main {
    margin: 50px;
}

.container {
    margin: 0 auto;
    width: fit-content;
}

html {
    background: #757575;
    height: 100%;
    overflow: auto;
}

.calci-frame {
    padding: 20px;
    /* border: 0.3px solid #E8E8EA; */
    border-radius: 10px;
    background: #424242;
}

header {
    justify-content: center;
    background: #424242;
    height: 130px;
    display: flex;
    align-items: center;
    font-family: 'Open Sans', sans-serif;
    border-radius: 0 0 20px 20px;
}

header h1 {
    font-weight: 100;
    text-transform: capitalize;
    color: #E8E8EA;
    background: #757575;
    padding: 15px;
    border-radius: 20px;
}

footer {
    padding: 40px 0 0 0;
    text-align: center;
    font-family: 'Open Sans', sans-serif;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.container-footer {
    margin: 0 auto;
    width: 100%;
    border-radius: 20px 20px 0 0;
    background: #424242;
}

.container-footer img {
    width: 250px;
    height: auto;
    display: inline-block;
    margin-top: 30px;
    margin-bottom: 10px;
}

.copyright {
    display: inline-block;
    font-size: 15px;
    color: #6a6a6a;
}

.github-link img {
    width: 200px;
    height: auto;
    margin: 8px;
    cursor: pointer;
    margin-bottom: 20px;
}

.github-link img:hover {
    box-shadow: 0 0 8px #98CA2B, 0 0 10px #000;
}