* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  background: #fff;
  color: #111;
  line-height: 1.7;
  padding: 4rem 1.25rem;
  text-align: center;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

main {
  max-width: 640px;
  margin: 0 auto;
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.15rem;
  margin-bottom: 0.9rem;
}

.lead {
  color: #555;
  margin-top: 0.5rem;
}

.social {
  margin-top: 0.75rem;
}

.social a {
  color: #ff6600;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}

.social a:hover {
  text-decoration: underline;
}

section {
  margin-top: 1.5rem;
}

.block {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 10px;
  padding: 1.5rem;
}

.block.highlight {
  text-align: center;
  border-color: #ff6600;
}

.label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #888;
}

.total {
  font-size: 2.75rem;
  font-weight: 700;
  color: #ff6600;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

ol {
  padding-left: 0;
  list-style-position: inside;
}

ul {
  padding-left: 0;
  list-style-position: inside;
}

li {
  margin-bottom: 0.4rem;
}

p {
  margin-bottom: 0.9rem;
}

p:last-child {
  margin-bottom: 0;
}

.note {
  color: #555;
  font-size: 0.9rem;
}

.note strong {
  color: #111;
  font-variant-numeric: tabular-nums;
}

.addr {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
  text-align: left;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.8rem;
  color: #555;
  border: 1px solid #eee;
  border-radius: 6px;
  padding: 0.4rem 0.5rem 0.4rem 0.75rem;
}

.addr-text {
  flex: 1;
  word-break: break-all;
}

.copy-btn {
  flex: none;
  background: transparent;
  color: #111;
  font-size: 1rem;
  line-height: 1;
  padding: 0.25rem 0.35rem;
  border-radius: 4px;
}

.copy-btn:hover {
  background: #f2f2f2;
}

.buy {
  display: block;
  width: 100%;
  background: #ff6600;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  text-decoration: none;
}

.buy:hover {
  background: #e65c00;
}

button {
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  background: #111;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.5rem 1rem;
  cursor: pointer;
}

button:hover {
  background: #ff6600;
}