:root {
  color-scheme: light dark;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #eef2f9;
  color: #172033;
}

@media (prefers-color-scheme: dark) {
  :root { background: #0d131d; color: #e9eef7; }
  .card { background: #151d2a; border-color: #273347; }
  .lead, .facts { color: #aab7ca; }
  input { background: #0f1622; border-color: #2c3a50; color: #e9eef7; }
  .mono { color: #c7d4e8; }
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 2rem;
  background:
    radial-gradient(circle at 15% 10%, rgba(79, 140, 255, 0.18), transparent 35rem),
    radial-gradient(circle at 85% 90%, rgba(246, 130, 31, 0.14), transparent 30rem);
}

.card {
  width: min(100%, 42rem);
  padding: 2.4rem;
  border: 1px solid #dbe3f0;
  border-radius: 22px;
  background: #ffffff;
  box-shadow: 0 30px 80px rgba(23, 32, 51, 0.14);
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: #4f8cff;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 1.5rem;
  color: #5c6b82;
  font-size: 1.05rem;
  line-height: 1.6;
}

form { margin: 1.2rem 0 1rem; }

label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.9rem;
  font-weight: 650;
}

.row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

input {
  flex: 1 1 16rem;
  min-width: 0;
  padding: 0.75rem 0.9rem;
  border: 1px solid #cfd9e8;
  border-radius: 12px;
  font: inherit;
  background: #fbfcff;
}

input:focus-visible, button:focus-visible {
  outline: 2px solid #4f8cff;
  outline-offset: 2px;
}

button {
  padding: 0.75rem 1.3rem;
  border: 0;
  border-radius: 12px;
  background: #4f8cff;
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:disabled { opacity: 0.6; cursor: progress; }

.status {
  min-height: 1.4rem;
  margin: 0.8rem 0 0;
  color: #2f7d4a;
  font-size: 0.92rem;
}

.status.error { color: #b42318; }

.facts {
  margin: 0;
  padding-left: 1.15rem;
  color: #5c6b82;
  font-size: 0.92rem;
  line-height: 1.7;
}

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }