:root { --paper: #ECE9E1; --ink: #15140F; --mute: #6F6B60; --line: #D9D5C9; --card: #F5F3EC; --accent: #E8603C; color-scheme: light; }
@media (prefers-color-scheme: dark) { :root { --paper: #121110; --ink: #ECE9E1; --mute: #8F8B80; --line: #2A2823; --card: #1A1917; color-scheme: dark; } }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.5 -apple-system, "SF Pro Text", "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif; }
main { max-width: 640px; margin: 0 auto; padding: 24px 16px 64px; }
header { display: flex; align-items: center; justify-content: space-between; padding: 8px 0 32px; }
.mark { font-weight: 800; font-size: 28px; letter-spacing: -0.05em; text-decoration: none; color: var(--ink); }
.mark i { display: inline-block; width: 7px; height: 7px; margin-left: 3px; border-radius: 50%; background: var(--accent); }
.lang { font: 500 13px ui-monospace, "SF Mono", Consolas, monospace; letter-spacing: .06em; }
.lang button { background: none; border: 0; padding: 6px 4px; color: var(--mute); cursor: pointer; font: inherit; }
.lang button[aria-pressed=true] { color: var(--ink); }
h1 { font-size: clamp(30px, 6vw, 44px); line-height: 1.1; letter-spacing: -0.03em; margin: 0 0 12px; }
h2 { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--mute); font-weight: 600; margin: 32px 0 10px; }
p { margin: 0 0 12px; }
.mute { color: var(--mute); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.choice { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.choice button, .cur button { border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 12px; padding: 16px; font: 600 17px inherit; font-family: inherit; cursor: pointer; text-align: left; }
.choice button small { display: block; font-weight: 400; font-size: 13px; color: var(--mute); margin-top: 2px; }
.choice button[aria-pressed=true], .cur button[aria-pressed=true] { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.cur { display: flex; gap: 8px; }
.cur button { padding: 10px 16px; font-size: 15px; }
.consent { display: flex; gap: 10px; align-items: flex-start; margin: 20px 0; font-size: 14px; color: var(--mute); }
.consent input { margin-top: 4px; accent-color: var(--ink); width: 18px; height: 18px; flex: none; }
.go, .btn { display: inline-block; border: 0; border-radius: 12px; background: var(--ink); color: var(--paper); padding: 14px 22px; font: 600 16px inherit; font-family: inherit; text-decoration: none; cursor: pointer; }
.go[disabled] { opacity: .35; cursor: default; }
.btn.alt { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.err { color: #C0392B; min-height: 1.4em; font-size: 14px; }
.steps { list-style: none; padding: 0; margin: 20px 0; display: grid; gap: 10px; }
.steps li { display: grid; grid-template-columns: 28px 1fr; gap: 12px; align-items: start; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); opacity: .55; }
.steps li.on { opacity: 1; border-color: var(--ink); }
.steps li.done { opacity: 1; }
.steps b.n { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--line); font: 600 13px ui-monospace, Consolas, monospace; }
.steps li.done b.n { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.steps .actions { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.key { font: 600 clamp(14px, 4.4vw, 20px) ui-monospace, "SF Mono", Consolas, monospace; letter-spacing: .02em; overflow-wrap: anywhere; padding: 14px; background: var(--paper); border: 1px dashed var(--mute); border-radius: 10px; margin: 8px 0; user-select: all; }
.small { font-size: 13px; }
a { color: inherit; }
ol.how { padding-left: 20px; } ol.how li { margin-bottom: 8px; }
code { font: 14px ui-monospace, "SF Mono", Consolas, monospace; background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; word-break: break-all; }
pre { font: 14px ui-monospace, "SF Mono", Consolas, monospace; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; overflow-x: auto; }
@media (max-width: 420px) { .choice { grid-template-columns: 1fr; } }