:root {
  --ink: #2a241f;
  --muted: #514940;
  --clay: #6e4334;
  --clay-deep: #5c382b;
  --paper: #fffdf9;
  --bg: #f4efe7;
  --blush: #f7eee6;
  --moss: #1f3f39;
  --moss-soft: #e5eeea;
  --line: #e0d5c6;
  --desk: #e5ddd0;
  --focus: #1f3f39;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei", "微软雅黑", "WenQuanYi Micro Hei", "Droid Sans Fallback", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.75;
  color-scheme: light;
}

body::before {
  content: "";
  display: block;
  height: 6px;
  background: #6e4334;
}

.skip {
  position: absolute;
  left: 1rem;
  top: 0.75rem;
  transform: translateY(-150%);
  z-index: 2;
  padding: 0.55rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}

.skip:focus {
  transform: none;
}

.sheet {
  width: min(68rem, calc(100% - 1.5rem));
  margin: 0 auto;
  padding: 1.5rem 0.25rem 2.5rem;
}

.mast h1,
.place h2,
.toc-name {
  font-weight: 600;
  line-height: 1.35;
}

.mast {
  padding: 0.5rem 0.35rem 1.35rem;
  border-bottom: 1px solid var(--line);
}

.mark {
  display: flex;
  gap: 0.4rem;
  margin: 0 0 0.9rem;
}

.mark span {
  width: 0.45rem;
  height: 0.45rem;
  background: #6e4334;
}

.mark span:nth-child(2) {
  background: #c4a484;
}

.mark span:nth-child(3) {
  background: #1f3f39;
}

h1 {
  margin: 0;
  font-size: clamp(1.85rem, 1.35rem + 2.1vw, 2.7rem);
  letter-spacing: 0.04em;
}

.lede {
  max-width: 36rem;
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.toc {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.toc li {
  display: flex;
}

.toc a {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  gap: 0.15rem;
  min-height: 4.75rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
}

.toc a:hover {
  border-color: #c4a484;
  background: var(--blush);
}

.toc-out {
  background: var(--moss-soft);
}

.toc-label {
  color: var(--clay-deep);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
}

.toc-out .toc-label {
  color: var(--moss);
}

.toc-name {
  font-size: 1.125rem;
}

.toc-url {
  color: var(--muted);
  font-size: 0.875rem;
}

main {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

main:focus,
.place:focus,
.place:focus-visible {
  outline: none;
}

.place {
  scroll-margin-top: 1rem;
  padding: 1.15rem 1.15rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: var(--paper);
}

.place:target {
  border-color: #6e4334;
  background: #fffaf6;
  box-shadow: inset 4px 0 0 #6e4334;
}

.place-state {
  margin: 0;
  color: var(--clay-deep);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
}

.place h2 {
  margin: 0.2rem 0 0.45rem;
  font-size: 1.35rem;
}

.place p {
  margin: 0;
}

.back {
  margin-top: 0.35rem;
}

.back a,
.colophon a {
  color: var(--clay);
  text-underline-offset: 0.18em;
}

.colophon a {
  display: inline-block;
  padding: 0.2rem 0.15rem;
  margin: 0 0.05rem;
}

.back a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
}

.colophon {
  margin-top: 1.75rem;
  padding: 1.1rem 0.35rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

.colophon p {
  margin: 0.15rem 0;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

::selection {
  background: #ead7cb;
  color: var(--ink);
}

@media (min-width: 720px) {
  .sheet {
    width: min(68rem, calc(100% - 2.5rem));
    padding-top: 2rem;
  }

  .toc {
    grid-template-columns: 1fr 1fr;
  }

  .toc li:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  body {
    background: var(--desk);
  }

  body::before {
    display: none;
  }

  .sheet {
    margin: 2.25rem auto;
    padding: 2.4rem 2.6rem 2rem;
    background: var(--bg);
    border: 1px solid #d8cec0;
    border-radius: 1.25rem;
    box-shadow: 0 18px 40px rgba(62, 46, 32, 0.05);
  }

  .sheet::before {
    content: "";
    display: block;
    height: 6px;
    margin: -2.4rem -2.6rem 1.8rem;
    border-radius: 1.25rem 1.25rem 0 0;
    background: #6e4334;
  }

  .toc {
    grid-template-columns: repeat(5, 1fr);
  }

  .toc li:last-child {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media print {
  body,
  .sheet {
    background: white;
    box-shadow: none;
  }

  .skip,
  .back {
    display: none;
  }

  a {
    text-decoration: underline;
  }
}