* {
    box-sizing:border-box;
}

:root {
    --primary-color:#121212;
    --secondary-color:#ffffff;
    --link-color:#000066;
}

body {
    color:var(--primary-color);
    font-family:"Open Sans", sans;
    font-size:17px;
    margin:0 auto;
    padding:0;
    max-width:1920px;
}

/*** Header styles ***/

header {
    position:sticky;
    top:0;
}

@media screen and (max-width:1024px) {
    header #main-menu {
        animation-name:menu-expand;
        animation-duration:0.5s;
        animation-timing-function:ease-in;
    }

    header #main-menu.hidden {
        animation-name:menu-hide;
        animation-duration:0.5s;
        animation-timing-function:ease-out;
    }

    @keyframes menu-expand {
        from {
            opacity:0;
            transform:translateY(-10px);
        }
        to {
            opacity:100%;
            transform:translateY(0);
        }
    }

    @keyframes menu-hide {
        from {
            height:100%;
        }
        to {
            height:0;
        }
    }
}

h1.branding { font-family:"Special Gothic Condensed One", sans-serif; }

/*** Main content styles ***/

h2 { font-size:1.8rem; font-weight:700; }

h3 { line-height:120%; font-size:1.3rem; font-weight:600; text-transform:uppercase; }

p { margin:10px 0; }

header nav a:hover { border-bottom:1px solid var(--secondary-color); }
nav ul.social a:hover { border-bottom:none; }

a:hover { border-bottom:1px solid var(--link-color); }

.card-icon {
    position:absolute;
    display:flex;
    border-radius:50%;
    font-size:2rem;
    padding:.5rem;
    width:3.5rem;
    height:3.5rem;
    align-items:center;
    justify-content:center;
    justify-self:center;
    transform:translateY(-50%);
}

.skill-card { cursor:pointer; }

.skill-card:hover .card-icon {
    animation-name:skill-icon-twirl;
    animation-duration:3s;
    animation-timing-function:linear;
    animation-iteration-count:infinite;
}

@keyframes skill-icon-twirl {
    0% {
        transform:translateY(-50%) rotate(0deg);
    }
    25% {
        transform:translateY(-50%) rotate(90deg);
    }
    50% {
        transform:translateY(-50%) rotate(180deg);
    }
    75% {
        transform:translateY(-50%) rotate(270deg);
    }
    100% {
        transform:translateY(-50%) rotate(360deg);
    }
}

#projects ul li {
    list-style-type:disc;
    list-style-position:outside;
    font-weight:600;
    margin-left:1rem;
}

#projects ul li a { color:var(--link-color); }

#contact a { font-weight:500; }

form input, form textarea {
    border:1px solid #666666;
    padding:.5rem;
    width:100%;
}

#loader {
  display:none;
  align-items:center;
  justify-content:center;
  height:40px;
  gap:10px;
}

#loader.on {
    display:flex;
}

.loader-dot {
    list-style-type:none;
    list-style-image:none;
    margin:0;
    padding:0;
    width:12px;
    height:12px;
    border-radius:50%;
    background:var(--link-color);
    opacity:0.2;
    animation:loader-fade 1s linear infinite;
}

.loader-dot:nth-child(1) {
    animation-delay:0s;
}
.loader-dot:nth-child(2) {
    animation-delay:0.2s;
}
.loader-dot:nth-child(3) {
    animation-delay:0.4s;
}
.loader-dot:nth-child(4) {
    animation-delay:0.6s;
}
.loader-dot:nth-child(5) {
    animation-delay:0.8s;
}

@keyframes loader-fade {
  0% { opacity:0.2; }
  30% { opacity:1; }
  60% { opacity:0.2; }
  100% { opacity:0.2; }
}

/*** Footer styles ***/

@media screen and (max-width:768px) {
    body {
        font-size:16px;
    }
}