:root { color-scheme: light; --ink: #16202c; --muted: #5b6878; --line: #d6dde6; --accent: #0f5fa8; --bad: #b3261e; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 16px; background: #eef2f6; color: var(--ink);
  font: 16px/1.5 "Segoe UI", system-ui, -apple-system, sans-serif; }
.card { width: 100%; max-width: 400px; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 32px; }
h1 { margin: 0 0 6px; font-size: 22px; }
.lead { margin: 0 0 22px; color: var(--muted); font-size: 14px; }
label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
input { width: 100%; padding: 10px 12px; font: inherit; border: 1px solid #aeb9c6; border-radius: 6px; }
input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button { width: 100%; margin-top: 16px; padding: 11px; font: inherit; font-weight: 600; color: #fff; background: var(--accent); border: 0; border-radius: 6px; cursor: pointer; }
button:hover { background: #0c4f8c; }
.error { margin: 0 0 14px; padding: 9px 12px; color: var(--bad); background: #fdecea; border-radius: 6px; font-size: 14px; }