:root {
  color-scheme: light;
  --bg: radial-gradient(circle at 20% 0%, #f1f5f9 0%, #dbeafe 40%, #e2e8f0 100%);
  --card: rgba(255, 255, 255, 0.88);
  --text: #0f172a;
  --muted: #475569;
  --btn: #14532d;
  --btn-active: #166534;
  --btn-disabled: #64748b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.card {
  width: min(100%, 28rem);
  background: var(--card);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 1rem;
  padding: 1.5rem;
  display: grid;
  gap: 1rem;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
}

.label {
  margin: 0;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  line-height: 1.2;
}

button {
  border: 0;
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  background: var(--btn);
  transition: transform 120ms ease, background-color 120ms ease;
}

button:active {
  transform: scale(0.98);
}

button[aria-busy="true"] {
  background: var(--btn-active);
}

button:disabled {
  background: var(--btn-disabled);
}

.status-line {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 420px) {
  .card {
    padding: 1.2rem;
  }

  button {
    width: 100%;
  }
}