:root {
  --bg: #171513;
  --panel: #211e1a;
  --line: #38332c;
  --ink: #f6f1e7;
  --muted: #b3a999;
  --yellow: #ffc94d;
  --on-yellow: #3b1e00;
  --display: "Bricolage Grotesque", "Zen Kaku Gothic New", sans-serif;
  --body: "Instrument Sans", "Zen Kaku Gothic New", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --page: min(1120px, calc(100vw - 48px));
}

html[lang="ja"] {
  --display: "Zen Kaku Gothic New", "Bricolage Grotesque", sans-serif;
  --body: "Zen Kaku Gothic New", "Instrument Sans", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 1px 1px, rgb(255 201 77 / 9%) 1px, transparent 0) 0 0 / 28px 28px,
    var(--bg);
  color: var(--ink);
  font: 400 17px/1.7 var(--body);
  -webkit-font-smoothing: antialiased;
}

html[lang="ja"] body { line-break: strict; }
html[lang="ja"] :is(h1, h2, h3) { font-feature-settings: "palt"; }

a { color: inherit; text-underline-offset: 3px; }
a:hover { color: var(--yellow); }

:focus-visible { outline: 2px solid var(--yellow); outline-offset: 3px; }

code { font-family: var(--mono); font-size: .9em; }

.wrap { width: var(--page); margin-inline: auto; }

/* ---- Navigation ---- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 22px;
  font-size: 15px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 800 20px/1 var(--display);
  text-decoration: none;
}

.brand img { display: block; }

.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links span[aria-current] { color: var(--muted); }

/* ---- Hero ---- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 56px;
  padding-block: 56px 72px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--yellow);
  font: 700 14px/1.4 var(--mono);
  letter-spacing: .04em;
}

h1 {
  margin: 0;
  font: 800 clamp(46px, 7.4vw, 88px)/1.04 var(--display);
  letter-spacing: -.012em;
}

html[lang="ja"] h1 {
  font-size: clamp(38px, 6.2vw, 72px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.01em;
}

h1 .line { display: block; }

.cap {
  display: inline-block;
  padding: .02em .22em .06em;
  border-radius: .2em;
  background: var(--yellow);
  color: var(--on-yellow);
  box-shadow: 0 .07em 0 #b98500;
}

.cap-dark {
  background: #34302a;
  color: var(--ink);
  box-shadow: 0 .07em 0 #0c0b0a;
}

.lede {
  max-width: 34em;
  margin: 28px 0 32px;
  color: var(--muted);
  font-size: 19px;
}

.actions { display: flex; flex-wrap: wrap; gap: 14px; }

.button {
  display: inline-flex;
  align-items: center;
  padding: 13px 22px 14px;
  border: 1px solid var(--yellow);
  border-radius: 10px;
  background: transparent;
  color: var(--yellow);
  font: 700 16px/1.2 var(--body);
  text-decoration: none;
  cursor: pointer;
  transition: transform .12s ease, background-color .12s ease;
}

.button:hover { transform: translateY(-2px); color: var(--yellow); background: rgb(255 201 77 / 10%); }

.button-primary {
  background: var(--yellow);
  color: var(--on-yellow);
  box-shadow: 0 3px 0 #b98500;
}

.button-primary:hover { color: var(--on-yellow); background: #ffd56f; }

.tap-hint { margin: 16px 0 0; color: var(--muted); font-size: 15px; }

kbd {
  padding: 1px 7px 2px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--panel);
  font: 500 .88em/1 var(--mono);
}

.mark { position: relative; width: 248px; height: 248px; }
.mark img { display: block; rotate: -5deg; filter: drop-shadow(0 26px 40px rgb(0 0 0 / 55%)); }

.pop {
  position: absolute;
  padding: 2px 8px 3px;
  border-radius: 7px;
  background: var(--yellow);
  color: var(--on-yellow);
  font: 700 15px/1.3 var(--mono);
  box-shadow: 0 3px 0 #b98500;
  animation: pop .22s cubic-bezier(.2, 1.6, .4, 1) backwards;
}

.pop:nth-of-type(1) { top: -6px; left: -18px; animation-delay: .35s; }
.pop:nth-of-type(2) { top: 44px; right: -26px; animation-delay: .43s; }
.pop:nth-of-type(3) { bottom: 20px; left: -30px; animation-delay: .51s; }
.pop:nth-of-type(4) { right: 6px; bottom: -8px; animation-delay: .59s; }

@keyframes pop {
  from { opacity: 0; transform: scale(.4); }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
}

.hero-text > * { animation: rise .5s cubic-bezier(.2, .8, .2, 1) backwards; }
.hero-text > :nth-child(2) { animation-delay: .06s; }
.hero-text > :nth-child(3) { animation-delay: .12s; }
.hero-text > :nth-child(4) { animation-delay: .18s; }
.hero-text > :nth-child(5) { animation-delay: .24s; }

/* ---- Demo ---- */
.demo {
  width: var(--page);
  margin: 0 auto;
}

.demo img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 30px 80px rgb(0 0 0 / 55%), 0 0 0 6px rgb(255 201 77 / 8%);
}

.demo figcaption {
  margin-top: 16px;
  color: var(--muted);
  font-size: 15px;
}

/* ---- Sections ---- */
section { padding-block: 92px 0; }

h2 {
  margin: 0 0 36px;
  font: 800 clamp(32px, 4.4vw, 50px)/1.15 var(--display);
  letter-spacing: -.008em;
}

html[lang="ja"] h2 { font-weight: 900; letter-spacing: 0; }

h3 { margin: 0 0 6px; font: 700 21px/1.4 var(--display); }

/* Steps */
.steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }

.steps li {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  align-items: center;
  gap: 32px;
  padding-block: 30px;
  border-bottom: 1px solid var(--line);
}

.steps p { margin: 0; color: var(--muted); }

.step-visual {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font: 700 25px/1.2 var(--mono);
}

.step-visual .cap { box-shadow: 0 3px 0 #b98500; border-radius: 9px; padding: 5px 13px 7px; }
.step-visual .cap-dark { box-shadow: 0 3px 0 #0c0b0a; }
.step-visual .dim { opacity: .55; }
.step-visual .typed { opacity: .5; }

/* Details */
.columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 56px; }

.plain-list { margin: 0; padding: 0; list-style: none; }
.plain-list li { padding-block: 16px; border-top: 1px solid var(--line); color: var(--muted); }
.plain-list strong { display: block; color: var(--ink); font-weight: 700; }

/* Install */
.install { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 56px; align-items: start; }
.install p { margin: 0 0 14px; color: var(--muted); }
.install h3 { margin-top: 30px; }
.install h3:first-child { margin-top: 0; }

.command {
  position: relative;
  margin: 0 0 12px;
  padding: 18px 92px 18px 20px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  font: 500 15px/1.8 var(--mono);
}

.copy-block { position: relative; }

.copy {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 11px 5px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg);
  color: var(--ink);
  font: 700 13px/1.4 var(--body);
  cursor: pointer;
}

.copy:hover { border-color: var(--yellow); color: var(--yellow); }

.note {
  padding: 22px 24px;
  border-left: 4px solid var(--yellow);
  border-radius: 0 12px 12px 0;
  background: var(--panel);
}

.note p:last-child { margin-bottom: 0; }

/* Footer */
.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 32px;
  margin-top: 96px;
  padding-block: 28px 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 15px;
}

/* ---- Hint mode on this page ---- */
.hint-layer { position: fixed; inset: 0; z-index: 10; pointer-events: none; }

.hint {
  position: absolute;
  padding: 1px 6px 2px;
  border-radius: 5px;
  background: var(--yellow);
  color: var(--on-yellow);
  font: 700 13px/1.3 var(--mono);
  text-transform: uppercase;
  box-shadow: 0 2px 8px rgb(0 0 0 / 55%);
}

.hint .typed { opacity: .45; }
.hint[hidden] { display: none; }

.hint-status {
  position: fixed;
  bottom: 20px;
  left: 50%;
  z-index: 11;
  max-width: calc(100vw - 32px);
  padding: 9px 16px 10px;
  translate: -50% 0;
  border: 1px solid var(--yellow);
  border-radius: 10px;
  background: var(--bg);
  font-size: 15px;
}

.hint-status[hidden] { display: none; }

/* ---- Responsive ---- */
@media (width <= 860px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-block: 28px 56px; }
  .mark { order: -1; width: 112px; height: 112px; }
  .mark img { width: 112px; height: 112px; }
  .pop { display: none; }
  .steps li { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .columns, .install { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  section { padding-block-start: 68px; }
}

/* Hint mode needs a keyboard. */
@media (hover: none) {
  .try, .tap-hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}