:root {
  --bg: #F6F8F5; --card: #FFFFFF; --text: #11201D; --muted: #566A64;
  --primary: #13774A; --on-primary: #FFFFFF; --note: #EDF2EE;
  --error: #B3261E; --on-error: #FFFFFF; --border: #D5DFD9; --ok: #13774A;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1A18; --card: #16241F; --text: #E3EDE8; --muted: #A6BDB4;
    --primary: #85E5B2; --on-primary: #06291A; --note: #20302D;
    --error: #FFB4AB; --on-error: #690005; --border: #2E423C; --ok: #85E5B2;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 640px; margin: 0 auto; padding: 32px 16px 48px; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 1.05rem; margin: 28px 0 8px; }
a { color: var(--primary); }
.muted { color: var(--muted); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.03em; color: var(--primary); margin-bottom: 24px; font-size: 1.15rem; }
.brand svg { width: 28px; height: 28px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 20px; margin-top: 20px; }
.card h2 { margin-top: 0; }
.note { background: var(--note); border-radius: 12px; padding: 12px 14px; margin: 16px 0 0; }
ul, ol { padding-left: 20px; margin: 8px 0; }
label { display: block; font-weight: 600; margin-bottom: 6px; }
input[type=email], input[type=text] {
  width: 100%; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; min-height: 48px;
}
input.code { letter-spacing: 0.3em; font-variant-numeric: tabular-nums; }
input:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; margin: 16px 0; }
.check input { width: 22px; height: 22px; margin-top: 2px; flex: none; }
button {
  font: inherit; font-weight: 700; border: 0; border-radius: 999px; padding: 12px 22px;
  min-height: 48px; cursor: pointer; margin-top: 14px; background: var(--primary); color: var(--on-primary);
}
button.secondary { background: transparent; color: var(--primary); border: 1px solid var(--border); }
button.danger { background: var(--error); color: var(--on-error); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
[hidden] { display: none !important; }
.status { margin-top: 14px; font-weight: 600; }
.status.done::before { content: "✓ "; color: var(--ok); }
.status.problem::before { content: "! "; color: var(--error); }
.steps { color: var(--muted); font-size: 0.9rem; margin: 0 0 4px; }