* {
    margin: 0;
    padding: 0;
}

@font-face {
    font-family: "Inter";
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url("../fonts/InterDisplay-Medium.woff2") format("woff2");
}

:root {
    --padding: 1rem;
    --color-black: #000;
    --color-white: #fff;
    --color-dark: #111;
    --color-text: var(--color-black);
    --color-background: var(--color-white);
    --color-text-dark: var(--color-white);
    --color-background-dark: var(--color-dark);
    --font-family-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-size: 1.5rem;
}

html {
    font-family: var(--font-family-sans);
    font-size: var(--font-size);
    font-variant-numeric: tabular-nums;
    color: var(--color-text);
    background: var(--color-background);
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    padding: calc(var(--padding)/2);
    margin: 0 auto;
    overflow-x: hidden;
    -webkit-animation: fadein .5s ease-in;
    -moz-animation: fadein .5s ease-in;
    -ms-animation: fadein .5s ease-in;
    -o-animation: fadein .5s ease-in;
    animation: fadein .5s ease-in;
}

@keyframes fadein {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@-moz-keyframes fadein {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@-webkit-keyframes fadein {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@-ms-keyframes fadein {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* typo */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-size: inherit;
    font-weight: inherit;
    line-height: inherit;
}

.text p,
.text ul,
.text ol {
    margin-bottom: 1.25rem;
    line-height: 1.25;
    max-width: 30rem;
}

.text ul,
.text ol {
    margin-left: 1rem;
}

.text ul p,
.text ol p {
    margin-bottom: 0;
}

.text ul>li {
    list-style: square;
}

.text ol>li {
    list-style: decimal;
}

.text ul ol,
.text ul ul,
.text ol ul,
.text ol ol {
    margin-bottom: 0;
}

.text h2,
.h2 {
    font-size: inherit;
    margin-bottom: 1.25rem;
}

.text h3,
.h3 {
    margin-bottom: 1.25rem;
}

.intro {
    padding-top: calc(var(--padding)*1.25);
}

/* general styling */

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

a:link {
    color: var(--color-text);
    text-decoration: none;
}

a:visited {
    color: var(--color-text);
    text-decoration: none;
}

a:hover {
    color: var(--color-text);
    text-decoration: line-through;
}

a:active {
    color: var(--color-text);
    text-decoration: line-through;
}

a:after {
    position: absolute; 
    padding-left: 2px;
    content: "\2192"; 
}

header a:after {
    content: none;
}

.btn a:after {
    content: none;
}

button {
    padding: var(--padding);
    font-family: var(--font-family-sans);
    font-size: calc(var(--font-size) * 2);
    text-align: center;
    color: var(--color-text);
    border: none;
    background: var(--color-background);
    transition: all .2s ease-in-out;
}

button:hover {
    color: var(--color-text);
    background: var(--color-background);
    cursor: pointer;
    transform: scale(1.1);
}

header {
    position: sticky;
    position: -webkit-sticky;
    top: calc(var(--padding)/2);
    z-index: 1000;
}

footer {
    margin-top: calc(var(--padding)*4);
}

footer ul li {
    margin-bottom: calc(var(--padding)/6);
}

.columns {
    display: flex;
  }
  
  .one {
    flex: .28;
  }
  
  .two {
    flex: .35;
  }
  
  .three {
    flex: .50;
  }

.article-title {
    position: sticky;
    position: -webkit-sticky;
    top: calc(var(--padding)*1.75);
    margin-top: calc(var(--padding)*1.25);
    z-index: 1000;
  }

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
}


.gallery {
    margin: calc(var(--padding)*2) auto 0;
    text-align: center;
}

.gallery img {
    margin: 0 0 calc(var(--padding)*3);
}

.gallery .landscape {
    max-width: 100%;
    height: auto;
    aspect-ratio: 3/2;
}

.gallery .portrait {
    width: auto;
    max-height: 100%;
    aspect-ratio: 2/3;
}

/* xs */

@media screen and (min-width: 40rem) {

    .gallery .landscape {
        width: calc(100vh - (var(--padding)*4)); 
    }
    
    .gallery .portrait {
        height: calc(100vh - (var(--padding)*4));
    }
    
}

/* s */

@media screen and (min-width: 50rem) {

    .gallery .landscape {
        width: calc(100vh - (var(--padding)*6)); 
    }
    
    .gallery .portrait {
        height: calc(100vh - (var(--padding)*6));
    }
    
}


/* m */

@media screen and (min-width: 75rem) {

    .gallery .landscape {
        width: calc(100vh - (var(--padding)*6)); 
    }
    
    .gallery .portrait {
        height: calc(100vh - (var(--padding)*6));
    }
    
}


/* l */

@media screen and (min-width: 87rem) {

    .gallery .landscape {
        width: calc(100vh - (var(--padding)*10)); 
    }
    
    .gallery .portrait {
        height: calc(100vh - (var(--padding)*10));
    }
    
}

/* xl */

@media screen and (min-width: 100rem) {

    .gallery .landscape {
        width: calc(100vh - (var(--padding)*12));
    }

    .gallery .portrait {
        height: calc(100vh - (var(--padding)*12));
    }

}

/* xl */

@media screen and (min-width: 150rem) {

    .gallery .landscape {
        width: calc(100vh - (var(--padding)*16));
    }
    
    .gallery .portrait {
        height: calc(100vh - (var(--padding)*16));
    }
    
}

/* phone portrait orientation */

@media (orientation: portrait) and (hover: none) and (pointer: coarse) {
    .gallery {
        margin: calc(var(--padding)) auto 0;
    }
    
    .gallery img {
        margin: 0 0 calc(var(--padding)/2);
    }

    .gallery .landscape {
        width: calc(100vw - var(--padding));
    }

    .gallery .portrait {
        width: calc(100vw - var(--padding));
        height: auto;
    }

}

/* phone landscape orientation */

@media (orientation: landscape) and (hover: none) and (pointer: coarse) {
    .gallery img {
        margin: 0 0 calc(var(--padding)*2);
    }

    .gallery .landscape {
        width: auto;
        height: calc(((100vh - (var(--padding) * 2))/3)*2);
    }

    .gallery .portrait {
        height: calc(100vh - (var(--padding)*2));
    }

}

/* tablet portrait orientation */

@media (orientation: portrait) and (hover: none) and (pointer: coarse) and (min-width: 50rem) {
    .gallery img {
        margin: 0 0 calc(var(--padding)*4);
    }

    .gallery .landscape {
        width: calc(100vw - (var(--padding) * 10));
    }

    .gallery .portrait {
        width: calc(((100vw - (var(--padding) * 10))/3)*2);
        height: auto;
    }
}

/* tablet landscape orientation */

@media (orientation: landscape) and (hover: none) and (pointer: coarse) and (min-width: 50rem) {
    .gallery img {
        margin: 0 0 calc(var(--padding) * 4);
    }

    .gallery .landscape {
        width: auto;
        height: calc(((100vh - (var(--padding) * 4))/3)*2);
    }

    .gallery .portrait {
        height: calc(100vh - (var(--padding) * 4));
    }

}


.index-year {
    display: flex;
    flex-flow: row;
    justify-content: space-between;
    margin-top: calc(var(--padding)*1.62);
}

.index-year ul li {
    margin-bottom: calc(var(--padding)/2);
}

.index-year-label {
    flex: .28;
    position: sticky;
    position: -webkit-sticky;
    align-self: flex-start;
    top: 3rem;
}

.index-months-all {
    display: flex;
    flex-flow: column;
    flex: .85;
    justify-content: space-between;
    gap: var(--padding);
}

.index-month-single {
    display: flex;
    flex-flow: row;
}

.index-month-label {
    flex: 41.2%;
    position: sticky;
    position: -webkit-sticky;
    align-self: flex-start;
    top: 3rem;
}

.index-articles {
    flex: 58.8%;
    align-self: flex-start;
}

@media (prefers-color-scheme: dark) {
    html {
        color: var(--color-text-dark);
        background: var(--color-background-dark);
    }
    a:link {
        color: var(--color-text-dark);
    }
    
    a:visited {
        color: var(--color-text-dark);
    }
    
    a:hover {
        color: var(--color-text-dark);
    }
    
    a:active {
        color: var(--color-text-dark);
    }
    
    button {
        color: var(--color-text-dark);
        background: var(--color-background-dark);
    }
    
    button:hover {
        color: var(--color-text-dark);
        background: var(--color-background-dark);
    }
    
  }