:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --text: #1a1f2b;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --good: #16a34a;
  --border: #e2e6ee;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); margin: 0.5rem 0 0; font-size: 0.9rem; }

.wrap { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 2rem 1rem; gap: 1rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 2rem; width: 100%; max-width: 440px; box-shadow: 0 6px 30px rgba(20, 30, 50, 0.06); }
.card h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
.card .muted { margin: 0 0 1.25rem; font-size: 0.95rem; }
.hint { color: var(--muted); font-size: 0.85rem; margin-top: 1rem; }
.footer { margin-top: 2rem; font-size: 0.85rem; }

#codeInput {
  width: 100%;
  padding: 0.9rem 1rem;
  font-size: 1.5rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  letter-spacing: 0.12em;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8fafc;
  color: var(--text);
}
#codeInput:focus { outline: 2px solid var(--accent); border-color: transparent; }

button { font-family: inherit; }
button.primary {
  margin-top: 0.85rem;
  width: 100%;
  padding: 0.75rem;
  border-radius: 10px;
  border: 0;
  background: var(--accent);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
button.primary:hover { background: var(--accent-hover); }
button.primary:disabled { opacity: 0.6; cursor: not-allowed; }
button.danger {
  margin-top: 1rem;
  width: 100%;
  padding: 0.65rem;
  border-radius: 10px;
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  font-weight: 600;
  cursor: pointer;
}
button.danger:hover { background: var(--danger); color: white; }

.liveStats { background: #f8fafc; border: 1px solid var(--border); border-radius: 10px; padding: 0.75rem 1rem; margin-top: 1rem; font-size: 0.85rem; color: var(--muted); }
.liveStats div { display: flex; justify-content: space-between; padding: 0.15rem 0; }
.liveStats strong { color: var(--text); font-weight: 500; }