body {
    background-image: url("background-image.png");
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center 33%;
    background-size: contain;
    background-origin: border-box;
}

main { padding: 32px 16px; }

ul, ol {
    padding: 8px 16px 8px 24px;
    border-radius: 4px;

    word-wrap: break-word;
    overflow-wrap: break-word;
}

li {
    margin: 8px 0;
    
    font-size: 16px;
}





.skip-link {
    z-index: 1000;

    position: absolute;
    top: 0;
    left:0;
    transform: translateX(-200%);

    margin: 3.5px;
    padding: 6px 10px;

    font-size: 14px;
    text-decoration: none;

    background: #333;
    color: #FFF;

    border: 2px solid #C0C0C0;

    transition: left 0.15s ease;
}

.skip-link:focus-visible { transform: translateX(0); }





/* Header */
header h1 {
    margin-top: 40px;
    padding: 0 20px;

    font-size: 40px;    
    text-align: center;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

  /* Internal Link */
header nav.internal-link {
    margin: 32px 16px;
    padding: 24px 16px;
    border-radius: 16px;

    box-shadow: 0 0 10px 1px rgba(0, 0, 0, 0.2);
}

header nav.internal-link ul {
    list-style: none;

    display: flex;
    flex-direction: column;
    gap: 6.4px;

    margin: 0;
    padding: 0;

    background-color: transparent;
}

header nav.internal-link ul li { margin: 0; }

header nav.internal-link ul li a {
    display: inline-block;

    padding: 1.6px 3.2px;
    border-left: 2.4px solid hsl(0, 0%, 90%);

    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.8px;
    word-spacing: 3.2px;
    text-decoration: none;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-all;

    color: #555;
}

header nav.internal-link ul li a:hover { outline: 1px solid hsl(0, 0%, 75%); }
header nav.internal-link ul li a:active { background-color: rgba(0, 0, 0, 0.1); }

  /* External Link */
header nav.site-nav { margin: 0 16px; }

header nav.site-nav .nav-title {
    margin: 0;
    padding: 0;

    font-size: 16px;
    font-weight: bold;

    color: #555;
}

header nav.site-nav ul {
    list-style: none;

    display: flex;
    flex-direction: column;

    margin: 0;
    padding: 0;

    background-color: transparent;
}

header nav.site-nav ul li {
    display: block;
    
    border-top: 0.3px solid #C0C0C0;
    border-bottom: 0.3px solid #C0C0C0;

    margin: 0;
}

header nav.site-nav ul li a {
    display: block;

    padding: 1.2px 2.4px;

    font-size: 12px;
    line-height: 1.5;
    letter-spacing: 0.6px;
    word-spacing: 2.4px;
    text-decoration: none;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-all;

    color: #555;
}

header nav.site-nav ul li:nth-of-type(1) { border-top: none; }
header nav.site-nav ul li:nth-last-of-type(1) { border-bottom: none; }

header nav.site-nav ul li a:hover { box-shadow: 0 0 2px 1px rgba(0, 0, 0, 0.2); }
/* /Header */





/* Main */
main > section {
    display: flex;
    flex-wrap: wrap;
    gap: 0 12px;

    width: 100%;
}

main > section + section { margin-top: 96px; }

main > section > section {
    width: 100%;

    margin-top: 48px;
}

main > section > section:nth-of-type(-n + 1) { margin-top: 0; }

main h2 {
    width: 100%;

    margin-bottom: 4px;
    padding-bottom: 3.2px;
    border-bottom: 1.2px solid #DDD;

    font-size: 32px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

h2 + nav { width: 100%; }

h2 + nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 16px;

    width: 100%;

    margin: 0 0 20px;
    padding: 0;
}

h2 + nav li {
    list-style: none;

    display: inline-block;

    margin: 0;
    padding: 0;
}

h2 + nav a {
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.8px;
    word-spacing: 1.6px;
    word-wrap: break-word;
    overflow-wrap: break-word;

    color: #808080;
}

h2 + nav a:active { color: #555; }

h3 {
    width: 100%;

    padding: 6px 9px;
    margin-bottom: 9px;
    border-radius: 2.4px;

    font-size: 24px;
    font-weight: bold;
    word-wrap: break-word;
    overflow-wrap: break-word;

    color: #444;
    background-color: rgba(0, 0, 0, 0.075);
}

h4 {
    margin-top: 20px;
    padding: 5px 20px;

    font-size: 20px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}





p {
    width: 100%;

    margin: 8px 0;
    padding: 2px 6px;

    font-size: 20px;
    line-height: 1.5;
    letter-spacing: 0.5px;
    word-spacing: 4px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

p + p { margin-top: 2px 0; }

main p:first-child {
    margin-bottom: 32px;

    font-size: 16px;
}

dl {
    display: grid;
    grid-template-columns: 40% 1fr;
    gap: 0;

    width: 100%;

    margin: 6.4px 0;
    padding: 8px;
    border-radius: 4px;

    background-color: hsla(0, 0%, 80%, 25%);
}

dl > * {
    overflow-x: auto;

    padding: 3.2px 6.4px;

    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.8px;
    word-spacing: 3.2px; 
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: keep-all;
}

dl dt { white-space: pre; }

dl > :nth-child(2n+1) {
    padding-left: none;
    border: 0.5px solid #FFF;
    border-left: none;
}

dl > :nth-child(2n) {
    padding-left: none;
    border: 0.5px solid #FFF;
    border-right: none;
}

dl > :nth-child(-n+2) { border-top: none; }
dl > :nth-last-child(-n+2) { border-bottom: none; }

dd ul {
    margin: 0;
    padding: 0;
}

dd li {
    margin: 8px 0;

    font-size: 16px;
    line-height: 1.2;
    letter-spacing: 0.8px;
    word-spacing: 3.2px;
}

dd li:before { content: "・"; }

dl.dl-margin-bot { margin-bottom: 48px; }



/* Code Block */
[data-copy] {
    width: 100%;

    margin: 0 3px;
    padding: 0 6px;
    border-radius: 6px;

    font-family: 'Fira Code', 'Source Code Pro', 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.5;
    letter-spacing: 0.6px;
    text-shadow: 0 0 1px #00BCD4;

    color: #00BCD4;
    background-color: #252525;

    cursor: pointer;
}

[data-copy]:hover { background-color: #404040; }
[data-copy]:active { background-color: #000; }

[data-copy]:focus-visible {
    outline: 1.2px solid #00BCD4;
    outline-offset: -1.2px;
}

[data-copy] *::selection { background-color: #FFF; }

[data-copy] code {
    display: block;
    overflow-x: auto;

    width: 100%;

    padding: 6px 0;

    user-select: text;
}

[data-copy] + [data-copy] { margin-top: 3px; }

.code-group {
    overflow: hidden;

    width: 100%;

    margin: 0 3px;
    border-radius: 6px;

    background-color: #252525;
}

.code-group [data-copy] {
    margin: 0;
    border-top: 0.05px solid #555;
    border-bottom: 0.05px solid #555;
    border-radius: 0;
}

.code-group [data-copy]:first-of-type { border-top: none; }
.code-group [data-copy]:last-of-type { border-bottom: none; }

.code-group + .code-group { margin-top: 32px; }

.code-status {
    display: block;
    opacity: 0;

    max-width: 95%;
    max-height: 95%;
    position: fixed;
    left: 50%;
    bottom: 5%;
    transform: translateX(-50%);

    padding: 4px 8px;
    border-radius: 8px;

    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.8px;
    word-spacing: 3.2px; 
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;

    color: #FFF;
    background-color: rgba(0, 0, 0, 0.7);

    transition: opacity 0.3s ease;

    pointer-events: none;
}
/* /Code Block */
/* /Main */





/* Footer */
footer {
    padding: 32px 16px 16px;

    background: linear-gradient(180deg, #454545 30%, #252525 100%);
}

footer .license {
    font-size: 10px;

    color: #FFF;
}
/* /Footer */





@media (orientation: landscape) {
  body { background-size: cover; }

  header nav.internal-link {
      width: 75%;

      margin: 32px auto;
  }

  main > section > section {
      width: calc(50% - 6px);

      margin-top: 48px;
  }

  main > section > section.full-width {
      width: 100%;

      margin-top: 48px;
  }

  main > section > section:nth-of-type(-n + 1).full-width { margin-top: 0; }
  
  main > section:has(> section:nth-of-type(1):not(.full-width)) > section:nth-of-type(2) { margin-top: 0; }
}