:root {
  --bg: #0f1115;
  --fg: #e6e8eb;
  --muted: #8a94a6;
  --card: #161a22;
  --border: #252a34;
  --accent: #4f8cff;
  --error: #ff6b6b;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 15px/1.4 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  display: grid;
  place-items: center;
}
.card {
  width: min(360px, 92vw);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,.3);
}
h1 { margin: 0 0 16px; font-size: 20px; }
form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
label.inline { grid-auto-flow: column; grid-template-columns: auto 1fr; align-items: center; }
label.inline span { color: var(--fg); }
input[type=text], input[type=password], input:not([type]),
input[inputmode=numeric] {
  appearance: none;
  background: #0b0d12;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
  width: 100%;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  background: var(--accent);
  color: white;
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  font: inherit;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
p.error {
  background: rgba(255,107,107,.08);
  border: 1px solid rgba(255,107,107,.3);
  color: var(--error);
  padding: 8px 10px;
  border-radius: 8px;
  margin: 0 0 12px;
}
.muted { color: var(--muted); }