:root {
  --bg: var(--tg-theme-bg-color, #fff);
  --text: var(--tg-theme-text-color, #111);
  --hint: var(--tg-theme-hint-color, #888);
  --btn: var(--tg-theme-button-color, #2481cc);
  --btn-text: var(--tg-theme-button-text-color, #fff);
  --secondary: var(--tg-theme-secondary-bg-color, #f1f1f1);
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); font-size: 15px;
}
main { padding: 16px; max-width: 640px; margin: 0 auto; }
.card { background: var(--secondary); border-radius: 12px; padding: 16px; margin-bottom: 16px; }
h1 { margin: 0 0 12px; font-size: 20px; }
h2 { font-size: 15px; margin: 16px 0 8px; color: var(--hint); text-transform: uppercase; letter-spacing: .04em; }
.totals { display: grid; gap: 6px; }
.totals div { display: flex; justify-content: space-between; }
.totals span { color: var(--hint); }
.totals b { font-variant-numeric: tabular-nums; }
.progress { height: 8px; background: rgba(0,0,0,.08); border-radius: 4px; overflow: hidden; margin-top: 12px; }
.progress .bar { height: 100%; background: var(--btn); transition: width .3s; }
table.months { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
table.months th, table.months td { text-align: left; padding: 6px 4px; border-bottom: 1px solid rgba(0,0,0,.06); }
table.months th { color: var(--hint); font-weight: 500; }
ul.payments { list-style: none; padding: 0; margin: 0; }
ul.payments li { display: flex; gap: 8px; align-items: center; padding: 8px 0; border-bottom: 1px solid rgba(0,0,0,.06); }
ul.payments .pay-date { color: var(--hint); width: 92px; flex-shrink: 0; }
ul.payments .pay-amt { font-weight: 600; font-variant-numeric: tabular-nums; }
ul.payments .pay-note { color: var(--hint); flex: 1; font-size: 13px; }
ul.payments .pay-actions { display: flex; gap: 4px; }
ul.payments button { background: none; border: none; cursor: pointer; padding: 4px; font-size: 16px; color: var(--text); }
.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tabs button { flex: 1; padding: 10px; border: none; border-radius: 8px; background: rgba(0,0,0,.06); color: var(--text); font-size: 14px; cursor: pointer; }
.tabs button.active { background: var(--btn); color: var(--btn-text); }
form.pay-form { display: flex; flex-direction: column; gap: 8px; }
form.pay-form label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--hint); }
form.pay-form input { padding: 10px; border-radius: 8px; border: 1px solid rgba(0,0,0,.12); background: var(--bg); color: var(--text); font-size: 15px; }
form.pay-form button { padding: 12px; border: none; border-radius: 8px; background: var(--btn); color: var(--btn-text); font-size: 15px; font-weight: 600; cursor: pointer; }
form.pay-form button:disabled { opacity: .5; }
.form-msg { font-size: 13px; min-height: 16px; }
.form-msg.error { color: #d33; }
.form-msg.ok { color: #2a8f2a; }
#loader { padding: 32px; text-align: center; color: var(--hint); }
.error-block { padding: 16px; color: #d33; }