:root {
  --bg: var(--tg-theme-bg-color, #17181c);
  --text: var(--tg-theme-text-color, #ffffff);
  --hint: var(--tg-theme-hint-color, #8a8a8f);
  --btn: var(--tg-theme-button-color, #3390ec);
  --btn-text: var(--tg-theme-button-text-color, #ffffff);
  --card: var(--tg-theme-secondary-bg-color, #202127);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 16px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab-btn {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.tab-btn.active {
  background: var(--btn);
  color: var(--btn-text);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.loading, .hint { color: var(--hint); font-size: 14px; text-align: center; padding: 24px 0; }

.plans-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-card {
  background: var(--card);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.plan-info h3 { margin: 0 0 4px; font-size: 16px; }
.plan-info p { margin: 0; font-size: 13px; color: var(--hint); }

.plan-price {
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
  margin-left: 12px;
}

.buy-btn-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.buy-btn {
  padding: 8px 10px;
  border: none;
  border-radius: 8px;
  background: var(--btn);
  color: var(--btn-text);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  flex: 1;
}

.account-card {
  background: var(--card);
  border-radius: 14px;
  padding: 20px;
  text-align: center;
}

.account-card .sub-url {
  word-break: break-all;
  background: rgba(255,255,255,0.06);
  padding: 8px;
  border-radius: 8px;
  font-size: 12px;
  margin: 12px 0;
  user-select: all;
}

#qrcode {
  display: flex;
  justify-content: center;
  margin: 16px 0;
}

.copy-btn {
  padding: 8px 14px;
  border: none;
  border-radius: 8px;
  background: var(--btn);
  color: var(--btn-text);
  font-weight: 600;
  cursor: pointer;
  margin: 4px;
}

.copy-btn.secondary {
  background: rgba(255,255,255,0.08);
  color: var(--text);
}