:root {
  --brand: #F26522;
  --brand-dark: #d4551a;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --bg: #ffffff;
  --border: #e5e5ea;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 24px;
}
header.site .home {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
  white-space: nowrap;
}
header.site .home img { width: 36px; height: 36px; border-radius: 9px; }
header.site .home .accent { color: var(--brand); }
.lang-toggle { display: flex; gap: 4px; }
.lang-toggle button {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
}
.lang-toggle button.active {
  color: var(--brand);
  background: rgba(242, 101, 34, 0.1);
  font-weight: 600;
}
main.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 24px 80px;
}
main.page h1 {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
main.page .updated {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 28px;
}
main.page h2 {
  font-size: 1.25rem;
  margin: 32px 0 10px;
}
main.page p, main.page li { color: #3a3a3c; }
main.page p { margin-bottom: 12px; }
main.page ul, main.page ol { padding-left: 22px; margin-bottom: 12px; }
main.page li { margin-bottom: 6px; }
main.page a { color: var(--brand-dark); }
.lang-block { display: none; }
.lang-block.visible { display: block; }
.contact-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 24px;
  margin: 16px 0;
}
.contact-card .big { font-size: 1.05rem; font-weight: 600; }
.contact-card .muted { color: var(--text-secondary); font-size: 0.9rem; }
details.faq {
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
details.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  position: relative;
  padding-right: 28px;
}
details.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  color: var(--brand);
  font-size: 1.2rem;
}
details.faq[open] summary::after { content: "–"; }
details.faq p { margin-top: 10px; }
.step {
  display: flex;
  gap: 16px;
  margin: 24px 0;
}
.step .num {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step h3 { margin-bottom: 6px; }
.screenshot-placeholder {
  margin-top: 12px;
  width: min(260px, 100%);
  aspect-ratio: 9 / 16;
  border: 2px dashed #d0d0d5;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: center;
  padding: 12px;
  background: #fafafa;
}
footer.site {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
footer.site nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  margin-bottom: 12px;
}
footer.site a { color: var(--text-secondary); text-decoration: none; }
footer.site a:hover { color: var(--brand); }