:root {
  --bg: #ff8126;
  --ink: #111111;
  --accent: #a80f38;
  --paper: #fff9f1;
  --sky: #baddf3;
  --lime: #c5f53d;
  --space: clamp(20px, 3vw, 48px);
  --body: clamp(16px, 1.25vw, 19px);
  --lead: clamp(20px, 2vw, 28px);
  --heading: clamp(30px, 4vw, 56px);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font:
    var(--body)/1.65 "Segoe UI",
    "Microsoft YaHei",
    sans-serif;
}
a {
  color: inherit;
  text-underline-offset: 5px;
}
a:hover {
  text-decoration-thickness: 3px;
}
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 5px;
}
header {
  padding: 24px var(--space);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--bg);
}
.wordmark {
  font-size: 28px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.04em;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
nav a {
  text-decoration: none;
}
.hero {
  background: var(--bg);
  padding: 70px var(--space) 40px;
}
h1 {
  font-size: clamp(48px, 9vw, 144px);
  line-height: 1.05;
  margin: 0 0 90px;
  font-weight: 800;
  letter-spacing: -0.04em;
}
.hero-bottom {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  align-items: end;
}
.hero-bottom p {
  font-size: var(--lead);
  margin: 0;
}
.action,
button {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 16px 24px;
  text-decoration: none;
  border: 0;
  border-radius: 0;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.note,
figcaption {
  font-size: 14px;
  line-height: 1.55;
}
.note {
  margin-top: 40px;
}
.reading,
.config-section {
  padding: 110px var(--space);
}
.section-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 70px;
}
h2 {
  font-size: var(--heading);
  line-height: 1.15;
  letter-spacing: -0.035em;
  margin: 0 0 28px;
}
h3 {
  font-size: var(--lead);
  line-height: 1.4;
  margin: 0 0 20px;
}
p {
  margin: 0 0 24px;
  max-width: 76ch;
}
article {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  margin: 0 0 110px;
  scroll-margin-top: 30px;
}
article:last-child {
  margin-bottom: 0;
}
.answer {
  min-width: 0;
  max-width: 900px;
}
pre {
  background: #eee8df;
  padding: 24px;
  overflow: auto;
  font-size: 14px;
  line-height: 1.6;
}
code {
  overflow-wrap: anywhere;
}
figure {
  margin: 36px 0;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
  background: white;
}
figcaption {
  margin-top: 14px;
}
ul,
ol {
  padding-left: 24px;
}
li {
  margin-bottom: 16px;
}
.config-section {
  background: var(--sky);
}
form {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr;
  gap: 24px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
input {
  min-width: 0;
  width: 100%;
  padding: 14px;
  border: 1px solid #363636;
  background: white;
  color: var(--ink);
  font: inherit;
  border-radius: 0;
}
form button {
  justify-self: start;
  grid-column: 1/-1;
}
#config-message {
  margin-top: 24px;
}
[hidden] {
  display: none !important;
}
#config-result {
  max-width: 1000px;
  margin-top: 50px;
}
#config-result h3 {
  margin-top: 40px;
}
.verify {
  background: var(--lime);
}
.verify .lead {
  font-size: var(--lead);
  max-width: 38ch;
}
.verify ol {
  max-width: 850px;
}
details {
  max-width: 1000px;
  margin: 24px 0;
  padding: 24px;
  background: #eee8df;
}
summary {
  cursor: pointer;
  font-size: var(--lead);
  font-weight: 600;
}
details p {
  margin: 24px 0 0;
}
footer {
  padding: 70px var(--space) 0;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}
footer > div {
  max-width: 750px;
}
.footer-name {
  font-size: clamp(80px, 25vw, 360px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.06em;
  margin: 70px 0 0;
}
@media (max-width: 768px) {
  header {
    align-items: start;
  }
  nav {
    gap: 10px 18px;
    font-size: 14px;
    max-width: 260px;
  }
  .hero {
    padding-top: 60px;
  }
  h1 {
    margin-bottom: 60px;
  }
  .hero-bottom {
    display: block;
  }
  .action {
    margin-top: 24px;
  }
  .section-heading,
  article,
  form {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .reading,
  .config-section {
    padding: 75px var(--space);
  }
  article {
    margin-bottom: 75px;
  }
  .section-heading {
    margin-bottom: 45px;
  }
  pre {
    padding: 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}