:root {
  --bg: var(--tg-theme-bg-color, #0f1419);
  --text: var(--tg-theme-text-color, #e7e9ea);
  --hint: var(--tg-theme-hint-color, #8b98a5);
  --accent: var(--tg-theme-button-color, #1d9bf0);
  --accent-text: var(--tg-theme-button-text-color, #fff);
  --secondary: var(--tg-theme-secondary-bg-color, #1a222c);
  --border: rgba(255, 255, 255, 0.08);
  --f1: #5eb3ff;
  --f2: #ffb86b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px 32px;
}

.header h1 {
  margin: 0;
  font-size: 1.35rem;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.subtitle {
  margin: 6px 0 0;
  color: var(--hint);
  font-size: 0.95rem;
}

.badge {
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--secondary);
  color: var(--hint);
  white-space: nowrap;
}

.card {
  background: var(--secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 16px;
}

.muted {
  color: var(--hint);
  font-size: 0.9rem;
  line-height: 1.45;
}

code {
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 6px;
}

.balance-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--hint);
  margin-bottom: 8px;
}

.balance-value {
  font-size: 1.05rem;
  line-height: 1.4;
  margin-bottom: 16px;
}

.totals {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.total-pill {
  border-radius: 12px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
}

.total-pill.f1 {
  background: rgba(94, 179, 255, 0.12);
  border: 1px solid rgba(94, 179, 255, 0.25);
}

.total-pill.f2 {
  background: rgba(255, 184, 107, 0.12);
  border: 1px solid rgba(255, 184, 107, 0.25);
}

.total-pill strong {
  font-size: 1.1rem;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.tab {
  flex: 1;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--hint);
  border-radius: 12px;
  padding: 10px;
  font-size: 0.9rem;
  cursor: pointer;
}

.tab.active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: transparent;
}

.expenses {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.expense-item {
  background: var(--secondary);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: start;
}

.expense-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.expense-main {
  min-width: 0;
}

.expense-user {
  font-weight: 600;
  font-size: 0.95rem;
}

.expense-comment {
  color: var(--hint);
  font-size: 0.85rem;
  margin-top: 2px;
  word-break: break-word;
}

.expense-amount {
  font-weight: 700;
  white-space: nowrap;
}

.expense-date {
  grid-column: 1 / -1;
  font-size: 0.75rem;
  color: var(--hint);
  padding-top: 4px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

.empty {
  text-align: center;
  color: var(--hint);
  padding: 24px 8px;
}

.error {
  background: rgba(244, 67, 54, 0.15);
  border: 1px solid rgba(244, 67, 54, 0.35);
  color: #ff8a80;
  border-radius: 12px;
  padding: 12px;
  margin-top: 12px;
}

.hidden {
  display: none !important;
}

.nav {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}

.nav-btn {
  flex: 1;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--hint);
  border-radius: 12px;
  padding: 10px 6px;
  font-size: 0.82rem;
  cursor: pointer;
}

.nav-btn.active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: transparent;
}

.section-title {
  margin: 0 0 12px;
  font-size: 1rem;
}

.label {
  display: block;
  font-size: 0.8rem;
  color: var(--hint);
  margin: 8px 0 4px;
}

.input {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 8px;
}

.btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
}

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

.btn-danger {
  background: rgba(244, 67, 54, 0.2);
  color: #ff8a80;
  border: 1px solid rgba(244, 67, 54, 0.35);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.chip {
  flex: 1;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 0.9rem;
}

.chip.active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: transparent;
}

.row-2 {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.banter-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.invite-row {
  display: flex;
  gap: 8px;
}

.invite-row .input {
  margin-bottom: 0;
  flex: 1;
  font-size: 0.75rem;
}

.invite-row .btn {
  width: auto;
  margin-top: 0;
  white-space: nowrap;
}

.hint, .small {
  font-size: 0.8rem;
}

.archive-item {
  margin-bottom: 8px;
}

.archive-name {
  font-weight: 600;
  margin-bottom: 4px;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--secondary);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 0.9rem;
  z-index: 100;
  max-width: 90%;
}