:root { color-scheme: light dark; --accent: #4F46E5; --link: #4F46E5; --on-accent: #FFFFFF; --text: #0D0D0D; --muted: #5C5C63; --bg: #FFFFFF; --surface: #F6F6F8; --line: #E4E4E7; }
@media (prefers-color-scheme: dark) { :root { --link: #A5B4FC; --text: #F2F2F3; --muted: #A8A8AE; --bg: #0F0F10; --surface: #18181B; --line: #2A2A2E; } }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 32px 16px 48px; }
@media (min-width: 768px) { main { padding: 48px 24px 64px; } }
h1 { font-size: 32px; line-height: 40px; margin: 0 0 8px; }
h2 { font-size: 20px; line-height: 28px; margin: 32px 0 8px; }
.lead, p { color: var(--muted); }
a { color: var(--link); text-underline-offset: 2px; }
a:focus-visible, .button:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; border-radius: 4px; }
code { font: 14px/1.4 "JetBrains Mono", ui-monospace, Consolas, monospace; background: var(--surface); padding: 2px 4px; border-radius: 4px; overflow-wrap: anywhere; }
nav { display: flex; gap: 16px; margin-top: 32px; flex-wrap: wrap; }
@media (prefers-reduced-motion: no-preference) { a, .button { transition: color 150ms ease-out, background-color 150ms ease-out, border-color 150ms ease-out; } }

.skip { position: absolute; left: 8px; top: -48px; padding: 8px 12px; background: var(--accent); color: var(--on-accent); border-radius: 8px; z-index: 1; }
.skip:focus { top: 8px; }
header.site, footer.site { max-width: 960px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
header.site { border-bottom: 1px solid var(--line); }
header.site nav, footer.site nav { margin: 0; gap: 4px; }
header.site nav a, footer.site nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; text-decoration: none; color: var(--text); border-radius: 8px; }
header.site nav a:hover, footer.site nav a:hover { background: var(--surface); }
header.site nav a[aria-current="page"], footer.site nav a[aria-current="page"] { color: var(--link); font-weight: 600; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; color: var(--text); font-weight: 600; font-size: 18px; text-decoration: none; }
.brand img { border-radius: 8px; }
footer.site { border-top: 1px solid var(--line); margin-top: 32px; flex-direction: column; align-items: flex-start; }
footer.site p { margin: 0; font-size: 14px; }
@media (min-width: 768px) { footer.site { flex-direction: row; align-items: center; } }

.hero { text-align: left; padding: 16px 0 8px; }
.hero-icon { border-radius: 24px; box-shadow: 0 1px 2px rgb(0 0 0 / 0.08); }
.hero h1 { font-size: 32px; line-height: 40px; margin-top: 24px; }
@media (min-width: 768px) { .hero h1 { font-size: 40px; line-height: 48px; } }
.cta { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }
@media (min-width: 768px) { .cta { flex-direction: row; } }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px; border-radius: 8px; background: var(--accent); color: var(--on-accent); font-weight: 600; text-decoration: none; border: 1px solid var(--accent); }
.button:hover { filter: brightness(1.08); }
.button.secondary { background: transparent; color: var(--link); border-color: var(--line); }
.features { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 40px; }
@media (min-width: 768px) { .features { grid-template-columns: 1fr 1fr; } }
.features article { padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.features h2 { margin: 0 0 4px; font-size: 18px; }
.features p { margin: 0; }

.doc p, .doc li { color: var(--text); }
.doc .meta { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.doc .summary { padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); margin: 24px 0; }
.doc .summary h2 { margin-top: 0; }
.doc .summary ul { margin: 0; padding-left: 20px; }
.doc .summary li + li { margin-top: 8px; }
.help { max-width: 760px; }
.help .crumbs { margin: 0 0 16px; font-size: 14px; }
.help .footer { border-top: 1px solid var(--line); padding-top: 24px; margin-top: 48px; }
.help .guides { list-style: none; padding: 0; margin: 24px 0 0; display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 768px) { .help .guides { grid-template-columns: 1fr 1fr; } }
.help .guides a { display: block; min-height: 44px; padding: 16px; border: 1px solid var(--line); border-radius: 12px; color: var(--text); text-decoration: none; }
.help .guides a:hover { border-color: var(--accent); }
.help .guides a:focus-visible, .help a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.help .guides .title { display: block; font-weight: 600; }
.help .guides .summary { display: block; color: var(--muted); font-size: 14px; margin-top: 4px; }
.help .steps { padding-left: 24px; }
.help .steps > li { margin: 0 0 32px; padding-left: 4px; }
.help .steps p, .help dd, .help ul li { color: var(--text); }
.help strong { font-weight: 600; }
.help .shot { margin: 12px 0 0; }
.help .frame { position: relative; width: 100%; max-width: 320px; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.help .frame img { display: block; width: 100%; height: auto; }
.help .marker { position: absolute; border: 3px solid var(--accent); border-radius: 8px; }
.help .marker.point { border: 0; }
.help .badge { position: absolute; top: -14px; left: -14px; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: #FFFFFF; font: 600 14px/28px Inter, system-ui, sans-serif; text-align: center; }
.help .marker.point .badge { top: -14px; left: -14px; }
.help .legend { margin: 8px 0 0; padding-left: 24px; color: var(--muted); font-size: 14px; }
.help .notes dt { font-weight: 600; margin-top: 12px; }
.help .notes dd { margin: 4px 0 0; }
.help .qr-link { display: flex; align-items: center; gap: 16px; margin-top: 32px; padding: 16px; border: 1px solid var(--line); border-radius: 12px; }
.help .qr-link .qr { flex: none; border-radius: 4px; }
.help .qr-link p { margin: 0; color: var(--muted); }
@media (hover: none) and (pointer: coarse) { .help .qr-link { display: none; } }