:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1c1e21;
  --muted: #6b7280;
  --border: #d6d9de;
  --accent: #2f6fed;
  --accent-hover: #2459c4;
  --error: #c62828;
  --ok: #2e7d32;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --card: #1b1e24;
    --text: #e8eaed;
    --muted: #9aa0a6;
    --border: #343842;
    --accent: #5b8cff;
    --accent-hover: #7aa2ff;
    --error: #ef6b6b;
    --ok: #6fcf75;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.card {
  width: 100%;
  max-width: 360px;
  padding: 32px 28px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

h1 { margin: 0; font-size: 28px; }
.subtitle { margin: 4px 0 24px; color: var(--muted); }

form { display: flex; flex-direction: column; }

label { margin: 0 0 6px; font-size: 14px; color: var(--muted); }

input {
  margin-bottom: 16px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

button {
  margin-top: 8px;
  padding: 11px;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}
button:hover { background: var(--accent-hover); }
button:disabled { opacity: .6; cursor: progress; }

.status { min-height: 1.5em; margin: 14px 0 0; font-size: 14px; text-align: center; }
.status.error { color: var(--error); }
.status.ok { color: var(--ok); }