:root {
  color-scheme: light;
  --ink: #192722;
  --muted: #4e6158;
  --paper: #f7f8f3;
  --rule: #d4dfd6;
  --forest: #153b30;
  --deep: #102f26;
  --mint: #d9f2ba;
  --link: #165e49;
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo, system-ui, sans-serif;
  scroll-padding-top: 1.5rem;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.85; }
a { color: var(--link); text-underline-offset: .22em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid #b25a06; outline-offset: 4px; }
:target { scroll-margin-top: 1rem; }
.skip { position: absolute; inset: .5rem auto auto .5rem; transform: translateY(-145%); padding: .5rem 1rem; background: white; z-index: 2; }
.skip:focus { transform: none; }
.top {
  display: flex; align-items: center; flex-wrap: wrap; gap: 1rem;
  max-width: 1340px; margin: auto; padding: 1rem clamp(1rem, 4vw, 3.5rem);
}
.wordmark { color: var(--forest); font-size: 1.28rem; line-height: 1.4; font-weight: 850; text-decoration: none; letter-spacing: -.04em; }
.wordmark span { padding-left: .15em; font-weight: 580; }
.brand { color: var(--muted); font-size: .85rem; }
.top nav { margin-left: auto; display: flex; gap: clamp(.75rem, 2vw, 1.8rem); font-size: .9rem; }
.hero {
  background: var(--deep); color: #fcfff7; padding: clamp(1.6rem, 6vw, 5rem);
  max-width: 1260px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(16.5rem, 1fr);
  align-items: center; gap: clamp(2.2rem, 6vw, 5.5rem); border-radius: 1.3rem;
}
.hero .kicker { color: var(--mint); font-size: .9rem; font-weight: 700; margin: 0 0 1rem; }
.hero h1 { font-size: clamp(2rem, 5.2vw, 5rem); letter-spacing: -.055em; line-height: 1.17; margin: 0; }
.hero-lead { color: #d9e7de; max-width: 34rem; margin: 1.4rem 0 1.7rem; }
.hero-actions { display: flex; align-items: center; gap: .65rem 1.25rem; flex-wrap: wrap; }
.button { background: var(--mint); color: var(--deep); padding: .6rem 1.05rem; border-radius: .35rem; text-decoration: none; font-weight: 750; display: inline-flex; gap: 1.05rem; }
.button:hover { background: #edffd1; }
.quiet, .workshop a { color: #f6fff3; }
.workshop { padding: 1.25rem 1.4rem; border: 1px solid #618175; border-radius: .8rem; }
.workshop h2 { font-size: .86rem; color: var(--mint); margin: 0; }
.workshop ol { list-style-position: inside; margin: .3rem 0 0; padding: 0; }
.workshop li { padding: .55rem 0; border-top: 1px solid #507064; }
.workshop li:first-child { border: 0; }
.workshop li::marker { color: var(--mint); font-weight: 700; }
.workshop a { margin-left: .4rem; }
.shell {
  width: min(1200px, 100% - 3rem); margin: 2.8rem auto 4rem;
  display: grid; grid-template-columns: 12.6rem minmax(0,1fr); gap: clamp(1.6rem, 4vw, 4rem);
}
.contents nav { position: sticky; top: 1.25rem; max-height: calc(100vh - 2.5rem); overflow-y: auto; padding: .25rem .5rem .25rem .25rem; }
.contents h2 { font-size: .86rem; margin: 0 0 .6rem; }
.contents ul { margin: 0; padding: 0; list-style: none; border-left: 1px solid var(--rule); }
.contents a { display: block; text-decoration: none; padding: .29rem .65rem; font-size: .88rem; }
.contents a:hover { background: #e7efe3; text-decoration: underline; }
main { min-width: 0; overflow-wrap: anywhere; }
p, ol, ul { margin: .7rem 0 1rem; }
li + li { margin-top: .17rem; }
.notice, .break, .scenario { padding: .85rem 1.1rem; background: #e9f1e4; border-left: 3px solid #53816a; }
.notice { margin: 0 0 2rem; }
.break { font-weight: 700; }
.chapter { padding: 1rem 0 2.2rem; border-bottom: 1px solid var(--rule); margin-bottom: 1rem; }
.chapter:last-child { border: 0; }
.chapter header { padding-bottom: .65rem; }
.chapter h2, .standalone h1 { font-size: clamp(1.42rem, 2.4vw, 2.05rem); line-height: 1.45; margin: 0; color: var(--deep); }
.time { color: var(--link); font-size: .83rem; font-weight: 750; font-variant-numeric: tabular-nums; margin: 0 0 .3rem; }
h3 { color: var(--forest); font-size: 1.24rem; margin: 2rem 0 .65rem; line-height: 1.5; }
h4 { font-size: 1.02rem; margin: 1.5rem 0 .35rem; }
blockquote { margin: .8rem 0; padding: .25rem 1rem; border-left: 3px solid #8aa698; }
.gallery { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; margin: 1.35rem 0; }
.gallery.solo { grid-template-columns: minmax(0, 40rem); }
figure { margin: 0; border: 1px solid var(--rule); border-radius: .65rem; overflow: hidden; background: white; }
.zoom { display: grid; place-items: center; position: relative; background: #ecf2ed; padding: .4rem; height: clamp(9rem,24vw,16.5rem); }
.zoom img { max-width: 100%; max-height: 100%; object-fit: contain; min-height: 0; }
.zoom span { position: absolute; bottom: .45rem; right: .5rem; border-radius: .3rem; padding: .07rem .55rem; background: var(--deep); color: white; font-size: .78rem; }
.zoom:focus-visible { outline-offset: -4px; }
figcaption { padding: .7rem .85rem; font-size: .84rem; color: var(--muted); }
figcaption strong { color: var(--ink); }
dialog { width: min(96vw, 1250px); max-height: 95vh; padding: 0; border: 1px solid var(--rule); border-radius: .65rem; background: white; color: var(--ink); overflow: auto; }
dialog::backdrop { background: #0a201bd9; }
.dialog-head { display: flex; align-items: center; gap: .75rem; justify-content: space-between; padding: .6rem 1rem; position: sticky; top: 0; background: white; border-bottom: 1px solid var(--rule); }
.dialog-head p, .dialog-foot { margin: 0; font-size: .9rem; }
.dialog-foot { padding: .55rem 1rem; }
.dialog-body { display: grid; place-items: center; padding: .5rem; background: #e9f1eb; }
.dialog-body img { max-width: 100%; width: auto; height: auto; max-height: 76vh; object-fit: contain; }
button { font: inherit; color: inherit; border: 1px solid #717f76; border-radius: .3rem; padding: .15rem .6rem; cursor: pointer; background: transparent; }
.dialog-head button { white-space: nowrap; }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .91em; }
:not(pre) > code { background: #e7eee6; padding: .08em .32em; border-radius: .18em; }
.code-block, pre { margin: 1rem 0; border-radius: .55rem; background: #172d25; color: #eff9ed; }
.code-head { display: flex; align-items: center; gap: .55rem; padding: .5rem .75rem; border-bottom: 1px solid #567165; font-size: .78rem; flex-wrap: wrap; }
.copy-status { margin-left: auto; }
.code-head button:hover { background: #365447; }
pre { overflow-x: auto; padding: .9rem 1rem; line-height: 1.65; }
.code-block pre { margin: 0; }
.table-wrap { overflow: auto; margin: .85rem 0 1.2rem; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; background: white; }
th, td { border-bottom: 1px solid var(--rule); padding: .45rem .7rem; min-width: 4.5rem; }
th { background: #e8f1e7; text-align: left; }
.scenario .table-wrap { margin-bottom: 0; }
.standalone { width: min(900px, 100% - 2rem); margin: 2rem auto 4rem; }
.standalone h2 { margin-top: 2rem; font-size: 1.28rem; color: var(--forest); }
footer { max-width: 1200px; margin: 0 auto; padding: 1rem 1.5rem 2rem; text-align: right; }
@media (max-width: 1300px) { .hero { margin-inline: 1.5rem; } }
@media (max-width: 820px) {
  .shell { display: block; }
  .contents nav { position: static; margin-bottom: 1.5rem; }
  .contents ul { display: flex; flex-wrap: wrap; gap: .25rem .5rem; border-left: 0; }
  .contents a { padding: .25rem .55rem; background: #ebf1e8; border-radius: .2rem; }
}
@media (max-width: 630px) {
  .top { gap: .4rem; }
  .brand { display: none; }
  .hero { margin-inline: .75rem; grid-template-columns: 1fr; gap: 1.4rem; }
  .shell { width: calc(100% - 1.5rem); margin-top: 1.5rem; }
  .gallery { grid-template-columns: 1fr; }
  .zoom { height: 13rem; }
  ol, ul { padding-left: 1.55rem; }
}
@media print {
  .top, .hero-actions, .workshop, .contents, .code-head, footer, dialog, .zoom span { display: none; }
  body, .hero, pre { background: white; color: black; }
  .hero { display: block; margin: 0; padding: 0; }
  .hero h1 { font-size: 2rem; }
  .hero h1 br { display: none; }
  .hero-lead, .hero .kicker { color: black; }
  .shell { display: block; width: 100%; margin: 0; }
  figure { break-inside: avoid; }
  pre { white-space: pre-wrap; border: 1px solid #aaa; }
}