* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 20% 20%, rgba(48, 145, 255, 0.2), transparent 28rem),
    linear-gradient(135deg, #eef7ff 0%, #f8fbf4 45%, #fff6e8 100%);
  color: #172033;
  font-family: "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
}

.card {
  width: min(760px, calc(100vw - 32px));
  padding: 42px;
  border: 1px solid rgba(23, 32, 51, 0.12);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 24px 80px rgba(39, 74, 112, 0.18);
  backdrop-filter: blur(18px);
}

.verify-card {
  text-align: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: #2b6f9f;
  font: 700 13px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(32px, 6vw, 58px);
  line-height: 1.05;
}

h2 {
  margin: 0 0 12px;
}

p {
  margin: 0 0 18px;
  font-size: 18px;
  line-height: 1.8;
}

.hint {
  color: #506075;
}

.panel {
  margin-top: 28px;
  padding: 22px;
  border-radius: 18px;
  background: #f5f8fb;
}

dl {
  margin: 0;
}

dt {
  margin-top: 14px;
  font-weight: 700;
}

dd {
  margin: 6px 0 0;
  overflow-wrap: anywhere;
  color: #31526f;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.code {
  display: inline-block;
  margin: 20px 0 22px;
  padding: 20px 34px;
  border: 2px dashed #2b6f9f;
  border-radius: 24px;
  background: #f7fbff;
  color: #0d3b66;
  font: 800 clamp(48px, 12vw, 92px)/1 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.12em;
}

.button {
  display: inline-block;
  margin-top: 14px;
  padding: 13px 22px;
  border-radius: 999px;
  background: #172033;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}

.button.disabled {
  pointer-events: none;
  opacity: 0.45;
}

@media (max-width: 560px) {
  .card {
    padding: 28px 20px;
    border-radius: 22px;
  }
}