:root {
  color-scheme: light;

  --ink: #181818;
  --paper: #fafafa;
  --shadow-color: rgba(0, 0, 0, 0.1);

  --page-width: min(80vw, 90rem);
  --reading-width: 70ch;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
  --space-xxl: 12rem;

  --gradient: linear-gradient(90deg, #00ffff, #ff00ff, #ffa500);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --ink: #fafafa;
    --paper: #181818;
    --shadow-color: rgba(255, 255, 255, 0.1);
  }
}




* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;

  background-image:
    radial-gradient(at 15% 10%, rgba(0, 255, 255, 0.10) 0px, transparent 50%),
    radial-gradient(at 85% 40%, rgba(255, 0, 255, 0.12) 0px, transparent 50%),
    radial-gradient(at 20% 80%, rgba(255, 165, 0, 0.06) 0px, transparent 50%);

}

body {
  min-height: 100vh;
  margin: 0;
  padding: var(--space-md);

  display: flex;
  flex-direction: column;

  font-family: "Inter", sans-serif;
  line-height: 1.5;
}




h1,
h2,
h3 {
  line-height: 1;
  letter-spacing: -.04em;
  font-weight: 500;
}

h1 {
  font-size: clamp(3rem, 7vw, 7rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 4rem);
}

h3 {
  font-size: 1.25rem;
}

p,
li,
blockquote {
  max-width: var(--reading-width);
}

a {
  color: inherit;
  text-underline-offset: .2em;
}




header,
main,
footer {
  width: var(--page-width);
  margin-inline: auto;
}

main {
  flex: 1;
}

section {
  width: min(var(--reading-width), 100%);
  margin-block: var(--space-xxl);
}

hr {
  width: 100%;
}




header,
footer {
  text-align: center;
}

header {
  padding-block: var(--space-sm);
  padding-inline: var(--space-md);
  position: sticky;
  top: var(--space-md);
  width: 100%;
}

header p,
footer p {
  max-width: none;
}

footer {
  padding-block: var(--space-lg) var(--space-md);
  font-size: 0.875rem;
}




section>details {
  border-top: 1px solid currentColor;
  padding-block: var(--space-md);
}

section>details:last-child {
  border-bottom: 1px solid currentColor;
}

details> :not(summary) {
  margin-left: 1ch;
}




a.iridescent {
  align-self: center;
  text-decoration: none;
  background-image: var(--gradient);
  background-repeat: no-repeat;
  background-size: 100% 1.5px;
  background-position: 0 100%;
  padding-bottom: 4px;
}

mark.iridescent {
  background: var(--gradient);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.glass {
  background: rgba(255, 255, 255, 0.03);
  /* box-shadow: 0 4px 30px var(--shadow-color); */
  border-radius: 16px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}




.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.align-center {
  margin-inline: auto;
  text-align: center;
}

.align-right {
  margin-inline-start: auto;
}

.split {
  display: flex;
  align-items: center;
  justify-content: space-between;
}