:root {
  --bg: #ffffff;
  --text: #111111;
  --link: #0066cc;
  --logo-size-mobile: 48px;
  --logo-size-tablet: 64px;
  --logo-size-desktop: 80px;
  --logo-size-large: 96px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111111;
    --text: #ffffff;
    --link: #66aaff;
  }
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  animation: fadeIn 0.3s ease-in-out;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
::view-transition-old(root) {
  animation: slideOut 0.3s ease-out;
}
::view-transition-new(root) {
  animation: slideIn 0.3s ease-out;
}
@keyframes slideOut {
  to { transform: translateX(-20px); opacity: 0; }
}
@keyframes slideIn {
  from { transform: translateX(20px); opacity: 0; }
}
body.dark {
  --bg: #111111;
  --text: #ffffff;
  --link: #66aaff;
}
body.light {
  --bg: #ffffff;
  --text: #111111;
  --link: #0066cc;
}
body.neutral {
  --bg: #f5f5f3;
  --text: #222222;
  --link: #365c74;
}
header, footer {
  padding: 1rem;
  text-align: center;
  background: rgba(0,0,0,0.05);
}
#site-logo {
  display: inline-block;
  width: var(--logo-size-mobile);
  height: var(--logo-size-mobile);
  object-fit: contain;
  object-position: center;
  vertical-align: middle;
  image-rendering: -webkit-optimize-contrast;
  transition: opacity 0.15s ease-in-out;
}
@media (min-width: 640px) {
  #site-logo {
    width: var(--logo-size-tablet);
    height: var(--logo-size-tablet);
  }
}
@media (min-width: 1024px) {
  #site-logo {
    width: var(--logo-size-desktop);
    height: var(--logo-size-desktop);
  }
}
@media (min-width: 1440px) {
  #site-logo {
    width: var(--logo-size-large);
    height: var(--logo-size-large);
  }
}
a {
  color: var(--link);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: color .25s ease;
}
a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 2px;
  background: currentColor;
  transform: scaleX(.25);
  transform-origin: left;
  opacity: .55;
  transition: transform .25s ease, opacity .25s ease;
}
a:hover:not(.btn)::after,
a:focus-visible:not(.btn)::after {
  transform: scaleX(1);
  opacity: .95;
}
a:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
  border-radius: 2px;
}
/* High contrast boost if user sets forced-colors (Windows HC mode) */
@media (forced-colors: active) {
  a:not(.btn)::after { display: none; }
  a { text-decoration: underline; }
}
main {
  max-width: 800px;
  margin: auto;
  padding: 1rem;
}
.toggle-theme {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
}
.section { padding: 2rem 1rem; }
.container { max-width: 60rem; margin: 0 auto; }
.flow > * + * { margin-top: 0.75rem; }
.grid { display: grid; gap: 1.25rem; }
@media (min-width: 820px) {
  .cols-2 { grid-template-columns: 1.6fr 1fr; }
  .cols-2 > aside {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}
.lead { font-size: 1.125rem; }
.kicker { font-size: 0.95rem; opacity: 0.85; }
.cards { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .cards { grid-template-columns: repeat(4, 1fr); } }
.card {
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(0,0,0,0.05); 
  border-radius: 10px;
  padding: 1rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease, background .25s ease;
}
.card:hover,
.card:focus-within {
  box-shadow: 0 4px 10px -2px rgba(0,0,0,0.16), 0 1px 2px rgba(0,0,0,0.10);
  transform: translateY(-2px);
  border-color: rgba(0,0,0,0.12);
}
@media (pointer: coarse) {
  .card:hover { transform: none; box-shadow: 0 1px 2px rgba(0,0,0,0.06), 0 3px 8px -3px rgba(0,0,0,0.08); }
}
@media (prefers-color-scheme: dark) {
  .card {
    border-color: rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.04);
    box-shadow: 0 1px 2px rgba(0,0,0,0.6);
  }
}
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { position: relative; padding-left: 2.25rem; }
.steps li + li { margin-top: 1rem; }
.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0; top: 0.15rem;
  width: 1.6rem; height: 1.6rem; border-radius: 999px;
  display: grid; place-items: center;
  background: var(--link); color: #fff; font-size: 0.9rem;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,1px,1px); white-space: nowrap; border: 0;
}
.btn {
  display: inline-block;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--link);
  color: var(--link);
  text-decoration: none;
}
.btn:hover { filter: brightness(1.1); }
h1 { line-height: 1.25; margin-bottom: 0.5rem; }