:root {
  color: #16181d;
  background: #f4f5f7;
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  min-height: 100dvh;
  background: #f4f5f7;
}

.page {
  display: grid;
  min-height: 100vh;
  min-height: 100dvh;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) 20px max(24px, env(safe-area-inset-bottom));
}

.card {
  width: min(100%, 460px);
  padding: 36px 28px 28px;
  border: 1px solid #e2e4e9;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 18px 55px rgba(21, 29, 45, 0.08);
}

.brand {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 15px;
  background: #15171b;
  color: #fff;
  font-size: 23px;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.eyebrow {
  margin: 22px 0 9px;
  color: #717680;
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0;
  font-size: clamp(30px, 8vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.045em;
}

.summary {
  margin: 18px 0 26px;
  color: #575c66;
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
}

.steps {
  margin-top: 12px;
  padding: 18px;
  border-radius: 16px;
  background: #f7f8fa;
}

.steps h2 {
  margin: 0 0 12px;
  font-size: 15px;
}

.steps ol {
  display: grid;
  gap: 11px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  align-items: start;
  color: #353941;
  font-size: 15px;
  line-height: 1.5;
}

.step-number {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 999px;
  background: #fff;
  color: #23262c;
  font-size: 12px;
  font-weight: 800;
  box-shadow: inset 0 0 0 1px #dfe2e8;
}

.copy-button {
  width: 100%;
  min-height: 52px;
  margin-top: 20px;
  border: 0;
  border-radius: 14px;
  background: #16181d;
  color: #fff;
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.copy-button:focus-visible {
  outline: 3px solid #94b9ff;
  outline-offset: 3px;
}

.copy-button:active { transform: translateY(1px); }

.copy-status {
  min-height: 22px;
  margin: 9px 0 0;
  color: #28704a;
  font-size: 13px;
  text-align: center;
}

.security-note {
  margin: 14px 0 0;
  color: #888d97;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
}

html[data-device="ios"] .android-steps,
html[data-device="android"] .ios-steps { display: none; }

@media (max-width: 420px) {
  .page { padding-inline: 14px; }
  .card { padding: 30px 21px 23px; border-radius: 20px; }
}