:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f3f5f2;
  color: #17231d;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 20% 10%, rgba(85, 170, 118, 0.15), transparent 35%),
    #f3f5f2;
}

.card {
  width: min(100%, 440px);
  padding: 40px;
  border: 1px solid #dfe5df;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 24px 70px rgba(31, 51, 40, 0.1);
}

.brand {
  color: #27734a;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

h1 {
  margin: 14px 0 8px;
  font-size: clamp(28px, 7vw, 38px);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.intro, .status, .meta {
  color: #66736b;
  line-height: 1.55;
}

.code-panel {
  margin: 28px 0 20px;
  padding: 24px;
  border-radius: 18px;
  background: #eff8f1;
  text-align: center;
}

.label {
  color: #4f6056;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.otp {
  display: block;
  margin: 10px 0 4px;
  color: #165a35;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(38px, 12vw, 54px);
  font-weight: 800;
  letter-spacing: 0.12em;
}

.meta { margin: 0 0 18px; font-size: 13px; }

button {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 13px 18px;
  background: #1d6c43;
  color: #fff;
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

button:hover { background: #165a35; }
button:focus-visible { outline: 3px solid #91cba8; outline-offset: 3px; }

.secondary {
  margin-top: 10px;
  background: #e7ece8;
  color: #263b2f;
}

.secondary:hover { background: #dce5de; }
.status { margin: 22px 0 0; }

@media (max-width: 520px) {
  .card { padding: 30px 24px; border-radius: 20px; }
}