:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #17202a;
  background: #f0f3f7;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(circle at top left, rgba(0, 98, 155, 0.18), transparent 35rem),
    #f4f6f8;
}

.card {
  width: min(100%, 42rem);
  padding: clamp(1.5rem, 5vw, 3.5rem);
  border-top: 0.4rem solid #00629b;
  border-radius: 0.3rem;
  background: white;
  box-shadow: 0 1.2rem 3rem rgba(20, 36, 50, 0.12);
}

.eyebrow {
  color: #00629b;
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0.5rem 0 1rem;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

.intro, .help { color: #52616d; line-height: 1.6; }
.status, .result { min-height: 1.5rem; margin: 1.5rem 0; }
.result.success { color: #116530; }
.result.error { color: #a21c1c; }

.button {
  display: inline-block;
  border: 0;
  border-radius: 0.25rem;
  padding: 0.8rem 1.1rem;
  color: white;
  background: #00629b;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.button:hover { background: #004f7d; }
.button:disabled { cursor: wait; opacity: 0.6; }

.link-button {
  display: block;
  margin-top: 1rem;
  padding: 0;
  border: 0;
  color: #52616d;
  background: none;
  text-decoration: underline;
  cursor: pointer;
}

.help { margin-top: 2.5rem; font-size: 0.9rem; }