:root {
  --bg: #0a0a0a;
  --card: #141414;
  --border: #262626;
  --fg: #f5f5f5;
  --muted: #a3a3a3;
  --accent: #22d3ee;
  --error: #f87171;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--fg); }
body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
header {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.brand {
  font-weight: 800; letter-spacing: 0.04em; font-size: 1.1rem;
  padding: 2px 8px; border: 2px solid var(--fg); border-radius: 6px;
}
.title { font-size: 0.95rem; color: var(--muted); flex: 1; min-width: 0; }
.en { color: #737373; }
main { flex: 1; width: 100%; max-width: 820px; margin: 0 auto; padding: 24px 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; margin-bottom: 16px; }
h1 { font-size: 1.2rem; margin: 0 0 6px; }
.muted { color: var(--muted); margin: 0 0 16px; font-size: 0.92rem; }
form { display: flex; gap: 8px; flex-wrap: wrap; }
input {
  flex: 1 1 220px; min-width: 0; font: inherit; font-family: ui-monospace, Menlo, monospace; letter-spacing: 0.08em;
  padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border); background: #0f0f0f; color: var(--fg);
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  font: inherit; font-weight: 600; padding: 10px 18px; border-radius: 8px; border: 0;
  background: var(--fg); color: var(--bg); cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: wait; }
button.link { background: none; color: var(--muted); padding: 4px 8px; font-weight: 400; text-decoration: underline; }
.error { color: var(--error); margin: 12px 0 0; font-size: 0.9rem; }
.notes p { margin: 0 0 8px; }
.notes ul { margin: 0; padding-left: 18px; font-size: 0.9rem; line-height: 1.5; color: #d4d4d4; }
.notes li + li { margin-top: 6px; }
footer { text-align: center; color: #525252; font-size: 0.78rem; padding: 16px; }
footer p { margin: 0 0 6px; }
footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 16px; }
footer a, .consent a { color: var(--muted); }
.consent { color: #737373; font-size: 0.8rem; margin: 14px 0 0; }
[hidden] { display: none !important; }

@media (max-width: 520px) {
  .title .en { display: none; }
  main { padding: 16px; }
  .card { padding: 16px; }
}