:root {
  --bg: #08111f;
  --card: rgba(11, 23, 40, 0.88);
  --card-border: rgba(255, 255, 255, 0.12);
  --gold: #f2a900;
  --gold-light: #ffd580;
  --text: #f7fbff;
  --muted: #9fb0c4;
  --danger: #ff8a8a;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(242, 169, 0, 0.25), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(42, 111, 219, 0.2), transparent 34rem),
    var(--bg);
}

.page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 32px 16px;
}

.card {
  width: min(920px, 100%);
  padding: clamp(28px, 5vw, 56px);
  text-align: center;
  background: linear-gradient(145deg, var(--card), rgba(13, 34, 62, 0.92));
  border: 1px solid var(--card-border);
  border-radius: 32px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.asset-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 6px;
  margin: 0 auto 30px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  justify-content: center;
}

.asset-tab {
  min-width: 92px;
  padding: 12px 16px;
  color: var(--text);
  background: transparent;
  border-radius: 999px;
}

.asset-tab:hover,
.asset-tab.active {
  color: #1a1200;
  background: var(--gold);
  transform: none;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold-light);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.35rem, 7vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.asset-title {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.asset-panel {
  margin-top: 0;
}

.bitcoin-logo {
  display: block;
  width: clamp(88px, 16vw, 150px);
  height: clamp(88px, 16vw, 150px);
  margin: 28px auto 0;
  object-fit: contain;
  filter: drop-shadow(0 16px 30px rgba(242, 169, 0, 0.22));
}

.wallet-form {
  width: min(720px, 100%);
  margin: 36px auto 0;
  text-align: left;
}

.wallet-form label {
  display: block;
  margin: 0 0 10px;
  color: var(--muted);
  font-weight: 700;
}

.address-row {
  display: flex;
  gap: 12px;
}

input {
  width: 100%;
  min-width: 0;
  padding: 16px 18px;
  color: var(--text);
  font: inherit;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
  outline: none;
}

input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 169, 0, 0.16);
}

input[readonly] {
  color: var(--gold-light);
  cursor: default;
}

#wallet-address,
#ltc-wallet-address,
#xrp-wallet-address,
#eth-wallet-address {
  text-align: center;
}

button {
  padding: 0 24px;
  color: #1a1200;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
  background: var(--gold);
  border: 0;
  border-radius: 16px;
  transition:
    transform 180ms ease,
    background 180ms ease;
}

button:hover {
  background: #ffc044;
  transform: translateY(-1px);
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
  transform: none;
}

.copy-button {
  color: var(--text);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.copy-button:hover {
  background: rgba(255, 255, 255, 0.22);
}

.display-address {
  max-width: 760px;
  margin: 24px auto 0;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 1rem;
}

.donation-text {
  margin: 28px auto 0;
  color: var(--gold-light);
  font-size: clamp(1.15rem, 3vw, 1.75rem);
  font-weight: 900;
  line-height: 1.25;
}

.qr-section {
  display: grid;
  justify-items: center;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
}

.bitcoin-qr {
  display: block;
  height: auto;
  border-radius: 16px;
}

.qr-link {
  display: inline-flex;
  padding: 10px;
  border-radius: 18px;
}

.qr-link:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.qr-caption {
  margin: 0;
  color: var(--text);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.35;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.stat {
  padding: 24px;
  text-align: left;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
}

.stat span {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.stat strong {
  display: block;
  color: var(--text);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.1;
}

#wallet-value,
#btc-balance,
#btc-price,
#ltc-wallet-value,
#ltc-balance,
#ltc-price,
#xrp-wallet-value,
#xrp-balance,
#xrp-price,
#eth-wallet-value,
#eth-balance,
#eth-price {
  text-align: right;
}

#btc-balance,
#ltc-balance,
#xrp-balance,
#eth-balance {
  white-space: nowrap;
}

.main-stat {
  grid-column: span 3;
  background: linear-gradient(135deg, rgba(242, 169, 0, 0.22), rgba(255, 255, 255, 0.08));
}

.main-stat strong {
  color: var(--gold-light);
  font-size: clamp(2.2rem, 6vw, 4.2rem);
}

.status {
  min-height: 1.4em;
  margin: 14px auto 0;
  color: var(--muted);
  text-align: center;
}

.status.error {
  color: var(--danger);
}

.transactions {
  margin-top: 22px;
  text-align: left;
}

.transactions h2 {
  margin: 0 0 14px;
  color: var(--text);
  font-size: 1.15rem;
}

.transactions-list {
  display: grid;
  gap: 10px;
}

.transaction-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  color: var(--text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
}

.transaction-item:hover {
  border-color: rgba(242, 169, 0, 0.5);
}

.transaction-info {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.transaction-info small,
.empty-transactions {
  color: var(--muted);
}

.transaction-amount {
  flex: 0 0 auto;
  font-weight: 900;
}

.transaction-amount.incoming {
  color: var(--gold-light);
}

.transaction-amount.outgoing {
  color: var(--danger);
}

@media (max-width: 720px) {
  .address-row,
  .stats {
    grid-template-columns: 1fr;
  }

  .address-row {
    display: grid;
  }

  button {
    padding: 16px 24px;
  }

  .main-stat {
    grid-column: auto;
  }

  .transaction-item {
    align-items: flex-start;
    flex-direction: column;
  }
}