.crypto-logo,
body {
  display: flex;
  color: #fff;
}
.address-label,
.crypto-name {
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.copy-btn,
.crypto-btn {
  cursor: pointer;
  transition: 0.2s;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: #0a0a0a;
  min-height: 100vh;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.seo-header {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.main-content {
  width: 100%;
  max-width: 500px;
}
.card {
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 12px;
  padding: 48px;
  text-align: center;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}
.crypto-info {
  margin-bottom: 40px;
}
.crypto-logo {
  width: 48px;
  height: 48px;
  background: #f7931a;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 18px;
  font-weight: 600;
}
.address-label,
.copy-btn,
.copy-success,
.crypto-btn,
.crypto-name {
  font-weight: 500;
}
.crypto-name {
  font-size: 16px;
  color: #888;
}
.qr-container {
  background: #fff;
  border-radius: 8px;
  padding: 16px;
  margin: 0 auto 40px;
  display: inline-block;
  max-width: 310px;
  max-height: 310px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.qr-container img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 4px;
  alt: "암호화폐 지갑 주소 QR코드";
}
.address-section {
  margin-bottom: 32px;
}
.address-label {
  font-size: 12px;
  color: #666;
  margin-bottom: 12px;
}
.address-container {
  background: #111;
  border: 1px solid #2a2a2a;
  border-radius: 6px;
  padding: 16px;
  margin-bottom: 24px;
}
.address-text {
  font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas,
    "Courier New", monospace;
  font-size: 13px;
  color: #fff;
  word-break: break-all;
  line-height: 1.5;
}
.copy-btn {
  background: #f7931a;
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 14px;
  width: 100%;
}
.copy-btn:hover {
  background: #e8820f;
  transform: translateY(-1px);
}
.copy-btn:active {
  transform: translateY(0);
}
.crypto-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
  margin-top: 24px;
}
.crypto-btn {
  padding: 8px 12px;
  border: none;
  border-radius: 4px;
  font-size: 12px;
  opacity: 0.6;
}
.crypto-btn:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}
.crypto-btn.active {
  opacity: 1;
  transform: scale(1.02);
}
.crypto-btn.btc {
  background: #f7931a;
  color: #fff;
}
.crypto-btn.eth {
  background: #627eea;
  color: #fff;
}
.crypto-btn.sol {
  background: #9945ff;
  color: #fff;
}
.crypto-btn.ada {
  background: #0033ad;
  color: #fff;
}
.crypto-btn.xrp {
  background: #23252f;
  color: #fff;
}
.crypto-btn.trx {
  background: red;
  color: #fff;
}
.copy-success {
  position: fixed;
  top: 24px;
  right: 24px;
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  color: #fff;
  padding: 16px 20px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 1000;
  opacity: 0;
  transform: translateX(100px);
  transition: 0.3s;
}
.copy-success.show {
  opacity: 1;
  transform: translateX(0);
}
.seo-content {
  max-width: 800px;
  margin: 40px auto;
  padding: 20px;
  background: #1a1a1a;
  border-radius: 8px;
  line-height: 1.6;
}
.seo-content h2 {
  color: #f7931a;
  margin-bottom: 16px;
  font-size: 24px;
}
.seo-content h3 {
  color: #fff;
  margin: 24px 0 12px;
  font-size: 18px;
}
.seo-content p {
  color: #ccc;
  margin-bottom: 16px;
}
.crypto-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 20px 0;
}
.crypto-item {
  background: #111;
  padding: 16px;
  border-radius: 6px;
  border: 1px solid #2a2a2a;
}
.crypto-item h4 {
  color: #f7931a;
  margin-bottom: 8px;
}
.crypto-item p {
  font-size: 14px;
  margin-bottom: 8px;
}
@media (max-width: 480px) {
  .card {
    padding: 32px 20px;
    margin: 16px;
  }
  .address-text {
    font-size: 12px;
  }
  .copy-success {
    top: 16px;
    right: 16px;
    left: 16px;
    transform: translateY(-100px);
  }
  .copy-success.show {
    transform: translateY(0);
  }
  .seo-content {
    margin: 20px 10px;
    padding: 16px;
  }
  .crypto-list {
    grid-template-columns: 1fr;
  }
}