:root {
  --bg: #0d0f12; --card: #161a20; --line: #262c35; --text: #e8eaed; --dim: #9aa3ae;
  --accent: #e8952f; --ok: #3fb97a; --bad: #e5534b;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; -webkit-text-size-adjust: 100%; }
main { max-width: 560px; margin: 0 auto; padding: max(16px, env(safe-area-inset-top)) 16px 40px; }
header { display: flex; gap: 12px; align-items: center; margin: 4px 0 18px; }
h1 { margin: 0; font-size: 1.35rem; line-height: 1.2; }
h2 { margin: 0 0 10px; font-size: 1.05rem; }
p { margin: 0 0 10px; }
.dim { color: var(--dim); }
.small { font-size: .875rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin: 0 0 14px; }
.note { border-radius: 10px; padding: 10px 12px; margin: 0 0 14px; background: #2a2116; border: 1px solid #5a4020; }
.note.err { background: #2a1616; border-color: #5a2020; }
button { font: inherit; border: 0; border-radius: 10px; padding: 12px 16px; cursor: pointer; background: #2a313b; color: var(--text); min-height: 44px; }
button:disabled { opacity: .5; cursor: default; }
button.ok { background: var(--ok); color: #08140e; font-weight: 700; }
button.bad { background: var(--bad); color: #fff; font-weight: 700; }
button.go { background: var(--accent); color: #14100a; font-weight: 700; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row.wide button { flex: 1; }
.ask { border: 2px solid var(--accent); }
.ask .what { font-size: 1.2rem; font-weight: 700; margin: 4px 0 8px; overflow-wrap: anywhere; }
.ask .value { font-size: 1.6rem; font-weight: 800; margin: 8px 0 14px; }
.ask ul { list-style: none; margin: 0; padding: 0; font-size: .9rem; }
.ask li { padding: 6px 0; border-top: 1px solid var(--line); overflow-wrap: anywhere; }
.ask li:first-child { border-top: 0; }
.digits { font: 800 2.6rem/1 ui-monospace, Consolas, monospace; letter-spacing: .12em; margin: 10px 0 14px; }
.ok-text { color: var(--ok); }
.err-text { color: var(--bad); }
input[type=number] { font: inherit; width: 120px; padding: 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--text); }
label.risk { display: flex; gap: 10px; align-items: flex-start; margin: 12px 0; font-size: .9rem; }
label.risk input { margin-top: 4px; width: 18px; height: 18px; flex: none; }
ul.log { list-style: none; margin: 8px 0 0; padding: 0; font-size: .85rem; color: var(--dim); }
ul.log li { padding: 4px 0; }
details summary { cursor: pointer; color: var(--dim); font-size: .9rem; margin-top: 8px; }
footer { margin-top: 24px; text-align: center; }