/* Bigwave kit — a clean, neutral default. Apps override or ignore freely. */
:root {
  --bg: #fafafa; --fg: #111; --muted: #6b6b6b; --line: #e5e5e5; --card: #fff;
  --accent: #111; --accent-fg: #fff; --ok: #1a7f37; --notice: #fff8e1;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f0f10; --fg: #f2f2f2; --muted: #9a9a9a; --line: #262628; --card: #17171a;
          --accent: #f2f2f2; --accent-fg: #0f0f10; --notice: #2a2410; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); line-height: 1.55; }
a { color: inherit; }
.bar { display: flex; justify-content: space-between; align-items: center; gap: 16px;
       padding: 14px 20px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; text-decoration: none; letter-spacing: -0.01em; }
.who { font-size: 14px; color: var(--muted); }
.email { color: var(--fg); }
.wrap { max-width: 760px; margin: 0 auto; padding: 32px 20px 64px; }
.foot { text-align: center; color: var(--muted); font-size: 13px; padding: 24px; border-top: 1px solid var(--line); }
h1 { font-size: 30px; letter-spacing: -0.02em; margin: 0 0 12px; }
.lead { font-size: 18px; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.ok { color: var(--ok); }
.notice { background: var(--notice); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 28px; max-width: 460px; }
.stack { display: flex; flex-direction: column; gap: 14px; margin-top: 8px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
input { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); }
input.code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 22px; letter-spacing: 6px; text-align: center; }
.btn { display: inline-block; font: inherit; font-weight: 600; padding: 10px 18px; border-radius: 8px;
       background: var(--accent); color: var(--accent-fg); border: 0; cursor: pointer; text-decoration: none; }
.btn:hover { opacity: .9; }