:root {
  --bg: #eef1f5;
  --card: #ffffff;
  --ink: #1b2430;
  --muted: #5b6675;
  --accent: #1d4ed8;
  --accent-ink: #ffffff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 1rem;
}
.card {
  width: 100%;
  max-width: 26rem;
  background: var(--card);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid #d9dee6;
}
h1 { margin: 0 0 .5rem; font-size: 1.6rem; }
.status { color: var(--muted); margin: 0 0 1.25rem; }
.btn {
  display: block;
  width: 100%;
  margin: .5rem 0;
  padding: .8rem 1rem;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.1); }
.btn:focus-visible { outline: 3px solid #93b4ff; outline-offset: 2px; }