* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  background: #f5f6f8;
  color: #1c1c1e;
  font-size: 16px;
  line-height: 1.4;
  max-width: 640px;
  margin: 0 auto;
  padding-bottom: 40px;
  -webkit-font-smoothing: antialiased;
}

.topbar {
  position: sticky; top: 0; z-index: 10;
  background: #0d6efd;
  color: #fff;
  padding: 12px 16px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.topbar h1 { margin: 0; font-size: 20px; font-weight: 600; }
.topbar .count {
  display: inline-block;
  background: rgba(255,255,255,0.25);
  padding: 1px 10px; border-radius: 10px; font-size: 14px;
  margin-left: 6px; font-weight: 500;
}

.tabs {
  display: flex;
  background: #fff;
  border-bottom: 1px solid #e5e5ea;
  position: sticky; top: 48px; z-index: 9;
}
.tabs .tab {
  flex: 1;
  text-align: center;
  padding: 14px 8px;
  text-decoration: none;
  color: #555;
  font-weight: 500;
  border-bottom: 3px solid transparent;
}
.tabs .tab.active {
  color: #0d6efd;
  border-bottom-color: #0d6efd;
}

.actions {
  padding: 12px 16px 0;
  display: flex;
  gap: 8px;
}
.actions .btn { flex: 1; }

.spent {
  background: #fff;
  border-bottom: 1px solid #e5e5ea;
  padding: 10px 16px;
  font-size: 14px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.spent .lbl { color: #777; font-size: 13px; }
.spent .muted { color: #999; font-size: 12.5px; margin-left: 4px; }

.tariff {
  background: #eef5ff;
  border-radius: 8px;
  padding: 8px 10px;
  margin: 8px 0 4px;
  font-size: 15px;
  color: #0d3b80;
}
.tariff.promo {
  background: #fff4e0;
  color: #8a4a00;
}
.tariff.err {
  background: #f4f4f6;
  color: #888;
  font-size: 13.5px;
}
.tariff .promo-name {
  font-size: 12.5px;
  margin-top: 2px;
  color: #b8500a;
}

.paid-mark {
  background: #e8f7ec;
  color: #1e6e36;
  border-radius: 8px;
  padding: 7px 10px;
  margin: 8px 0 4px;
  font-size: 14.5px;
}
.paid-mark.other {
  background: #f0f0f3;
  color: #777;
}
.paid-mark .muted {
  color: #6b8a76;
  font-size: 12.5px;
  margin-left: 2px;
}
.paid-mark.other .muted { color: #999; }

.card .row.btns {
  flex-wrap: wrap;
}
.card .row.btns .btn {
  flex: 1 1 calc(50% - 4px);
  min-width: 0;
  font-size: 14px;
  padding: 9px 8px;
}
.card .row.btns .pay-link {
  text-decoration: none;
  text-align: center;
  display: inline-block;
}

.cards {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.empty {
  text-align: center;
  color: #888;
  padding: 40px 20px;
  font-size: 15px;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  border-left: 4px solid #ccc;
}
.card.ready { border-left-color: #34c759; }
.card.not-ready { border-left-color: #ff3b30; }

.card .row { display: flex; }
.card .row.top {
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.card code.id {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 17px;
  font-weight: 600;
  color: #1c1c1e;
  user-select: all;
  flex: 1 1 auto;
  word-break: break-all;
}
.copy-btn {
  background: #f0f0f3;
  border: none;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 16px;
  cursor: pointer;
}
.copy-btn:active { background: #d8d8db; }

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
}
.badge.ok { background: #d4f6dc; color: #1f7a35; }
.badge.no { background: #fddcd9; color: #b51913; }

.card .row.info {
  display: block;
  font-size: 14.5px;
  color: #333;
}
.card .row.info > div { margin: 3px 0; }
.card .row.info .lbl { color: #777; font-size: 13px; }
.card .row.info .muted { color: #999; font-size: 12.5px; margin-top: 6px; }
.card .row.info .err { color: #b51913; font-size: 13px; margin-top: 4px; }

.card .row.btns {
  margin-top: 10px;
  gap: 8px;
}

.btn {
  background: #fff;
  border: 1px solid #d0d0d5;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 500;
  color: #1c1c1e;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.btn:active:not(:disabled) { background: #ececef; transform: scale(0.98); }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn.primary {
  background: #0d6efd;
  color: #fff;
  border-color: #0d6efd;
}
.btn.primary:active:not(:disabled) { background: #0a58ca; }


@media (min-width: 480px) {
  .card .row.top { gap: 12px; }
}

/* --- Login --- */
.login-body { background: #f5f6f8; min-height: 100vh; display: flex; align-items: center; }
.login-wrap { width: 100%; padding: 24px 16px; }
.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 28px 22px;
  max-width: 380px;
  margin: 0 auto;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
.login-card h1 {
  margin: 0 0 22px;
  text-align: center;
  font-size: 22px;
  color: #0d6efd;
}
.login-form { display: flex; flex-direction: column; gap: 14px; }
.login-form label { display: flex; flex-direction: column; gap: 6px; }
.login-form label span { font-size: 13px; color: #555; }
.login-form input {
  padding: 12px 14px;
  border: 1px solid #d0d0d5;
  border-radius: 10px;
  font-size: 16px;
  background: #fafafa;
}
.login-form input:focus { outline: none; border-color: #0d6efd; background: #fff; }
.login-error {
  background: #fddcd9;
  color: #b51913;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
}

/* logout link in topbar */
.topbar .logout {
  position: absolute;
  right: 14px; top: 14px;
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 14px;
}
.topbar { position: relative; }
.topbar .logout:active { color: #fff; }