:root {
  --base03: #002b36;
  --base02: #073642;
  --base01: #586e75;
  --base00: #657b83;
  --base0: #839496;
  --base1: #93a1a1;
  --base2: #eee8d5;
  --base3: #fdf6e3;
  --yellow: #b58900;
  --orange: #cb4b16;
  --red: #dc322f;
  --magenta: #d33682;
  --violet: #6c71c4;
  --blue: #268bd2;
  --cyan: #2aa198;
  --green: #859900;

  --nav-width: 7rem;
  --nav-ham-size: 1.75rem;
  --breakpoint-mobile: 600px;
  --content-margin: 4rem;
  --main-offset: 11.5rem;
  --top-offset: var(--nav-width);

  --scrollbar-width: 1rem;
  --scrollbar-border: 0.125rem;
  --scrollbar-radius: 0.5rem;
  --scrollbar-bg: var(--base03);
  --scrollbar-thumb: var(--base02);

  --text-muted: rgba(255, 255, 255, 0.5);
  --text-strong: rgba(255, 255, 255, 0.75);
  --text-faint: rgba(255, 255, 255, 0.2);
  --overlay-bg: rgba(0, 0, 0, 0.25);
  --shadow-soft: 0.03125rem 0.03125rem rgba(0, 0, 0, 0.1);
}

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

html {
  background-color: var(--base03);
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: none;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-bg);
}

body {
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--base03);
  background: linear-gradient(-45deg, var(--base03), var(--base02));
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-size: 400% 400%;
  animation: gradient 12s ease infinite;
  font-family: Arial, sans-serif;
  color: var(--text-muted);
  text-shadow: var(--shadow-soft);
}

@media (hover: none) and (pointer: coarse) {
  body {
    background-attachment: scroll;
  }
}

@media (prefers-reduced-motion: reduce) {
  body {
    animation: none;
  }
}

h1 {
  margin-bottom: 1.5rem;
}

p {
  line-height: 1.25rem;
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

ol,
ul {
  margin-left: 1.25rem;
  padding-bottom: 2.5rem;
}

ol > li,
ul > li {
  line-height: 1.25rem;
  margin-top: 1.5rem;
}

ul > li > ul,
ol > li > ol,
ul > li > ol,
ol > li > ul {
  margin-bottom: 0;
  padding-bottom: 0;
}

ul > li > ul > li,
ol > li > ol > li,
ul > li > ol > li,
ol > li > ul > li {
  margin-top: 0.5rem;
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

.clickable {
  cursor: pointer;
}

.hide {
  display: none;
}

.no-select {
  user-select: none;
}

.hide-overflow {
  overflow: hidden;
}

.header {
  color: var(--text-muted);
  position: fixed;
  left: var(--nav-width);
}

.header > h1 {
  margin: 2.5rem 0;
  letter-spacing: 0.2rem;
}

.main {
  margin-top: var(--top-offset);
  position: relative;
  min-height: calc(100vh - var(--main-offset));
  min-height: calc(100dvh - var(--main-offset));
}

.center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.main > .center > h1 {
  color: var(--text-muted);
  position: relative;
  padding: 0.25rem 0.5rem;
  border: 0.25rem solid var(--text-muted);
}

@media only screen and (min-width: 600px) {
  .main {
    margin-left: var(--content-margin);
    margin-right: var(--content-margin);
  }
}

.blur {
  opacity: 0.25;
}

.fade {
  visibility: hidden;
}

.green {
  color: var(--green);
}

.skip-nav {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--base02);
  color: white;
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
}

.skip-nav:focus {
  top: 0;
}

/* --- Navigation --- */

.nav {
  position: fixed;
  top: 0;
  right: 0;
  left: auto;
  --nav-button-top: 3rem;
  --nav-button-right: 2.25rem;
  --nav-panel-top: calc(var(--nav-button-top) + 2.75rem);
  padding: 0 var(--nav-ham-size);
  cursor: pointer;
  width: 4.25rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  color: var(--text-muted);
}

.nav.show {
  background-color: var(--overlay-bg);
  backdrop-filter: blur(1px);
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
}

.nav > .nav-ham {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  width: var(--nav-ham-size);
  margin: 0;
  position: fixed;
  top: var(--nav-button-top);
  right: var(--nav-button-right);
  height: 1.5rem;
  z-index: 2;
  color: var(--text-faint);
}

.nav > .nav-ham > .nav-ham-item {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 0.12rem;
  width: 100%;
  background-color: currentColor;
  border-radius: 0.12rem;
  transform: translateY(-50%);
  transition: transform 0.15s ease, background-color 0.15s ease, opacity 0.15s ease;
}

.nav > .nav-ham:hover,
.nav > .nav-ham:focus-visible {
  color: var(--text-strong);
}

.nav > .nav-ham:hover > .nav-ham-item:nth-child(1),
.nav > .nav-ham:focus-visible > .nav-ham-item:nth-child(1) {
  transform: translateY(calc(-50% - 0.5rem));
}

.nav > .nav-ham:hover > .nav-ham-item:nth-child(2),
.nav > .nav-ham:focus-visible > .nav-ham-item:nth-child(2) {
  transform: translateY(-50%);
}

.nav > .nav-ham:hover > .nav-ham-item:nth-child(3),
.nav > .nav-ham:focus-visible > .nav-ham-item:nth-child(3) {
  transform: translateY(calc(-50% + 0.5rem));
}

.nav.show > .nav-ham {
  color: var(--text-strong);
}

.nav.show > .nav-ham > .nav-ham-item:nth-child(1) {
  transform: translateY(-50%) rotate(45deg);
}

.nav.show > .nav-ham > .nav-ham-item:nth-child(2) {
  opacity: 0;
}

.nav.show > .nav-ham > .nav-ham-item:nth-child(3) {
  transform: translateY(-50%) rotate(-45deg);
}

.nav > ul.nav-bar {
  border: none;
  display: none;
  background-color: transparent;
  cursor: pointer;
  width: 100%;
  max-width: 22rem;
  padding: 0.5rem 0;
  margin: 0;
}

.nav > ul.nav-bar > li {
  list-style-type: none;
  margin: 0;
}

.nav > ul.nav-bar > li > button {
  visibility: visible;
  opacity: 0;
  background-color: transparent;
  border: none;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
  padding: 0.75rem 0 0.75rem 1rem;
  cursor: pointer;
  color: inherit;
}

.nav > ul.nav-bar > li > button:hover {
  color: var(--text-strong);
}

.nav > ul.nav-bar > li > button > i.fa {
  font-size: 1.6rem;
}

.nav > ul.nav-bar > li > button > span {
  margin: 0;
  font-size: 1.15rem;
  display: block;
  text-align: end;
  width: auto;
}

.nav.show > ul.nav-bar {
  display: flex;
  position: fixed;
  top: var(--nav-panel-top);
  right: var(--nav-button-right);
  left: auto;
  flex-direction: column;
  gap: 0.25rem;
  max-height: calc(100vh - var(--nav-panel-top) - 1rem);
  max-height: calc(100dvh - var(--nav-panel-top) - 1rem);
  overflow: auto;
}

.nav.show > ul.nav-bar > li > button {
  display: flex;
  animation-name: nav-link-fade-in;
  animation-duration: 0.5s;
  animation-delay: 0.15s;
  animation-fill-mode: forwards;
}

@keyframes nav-link-fade-in {
  0% {
    visibility: visible;
    opacity: 0;
  }

  100% {
    visibility: visible;
    opacity: 1;
  }
}

/* --- Footer --- */

.footer {
  margin-top: auto;
  padding: 1rem var(--content-margin);
  text-align: center;
  color: var(--text-muted);
}

.footer > p {
  margin-bottom: 0;
  font-size: 0.9rem;
}