* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: var(--tg-theme-bg-color, #fff);
  --bg2: var(--tg-theme-secondary-bg-color, #f2f2f7);
  --text: var(--tg-theme-text-color, #111);
  --hint: var(--tg-theme-hint-color, #8e8e93);
  --link: var(--tg-theme-link-color, #2481cc);
  --btn: var(--tg-theme-button-color, #2481cc);
  --btn-text: var(--tg-theme-button-text-color, #fff);
  --card: var(--tg-theme-section-bg-color, #fff);
  --green: #34c759;
  --red: #ff3b30;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--tg-theme-bg-color, #1c1c1e);
    --bg2: var(--tg-theme-secondary-bg-color, #000);
    --text: var(--tg-theme-text-color, #fff);
    --hint: var(--tg-theme-hint-color, #98989e);
    --card: var(--tg-theme-section-bg-color, #2c2c2e);
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg2);
  color: var(--text);
  font-size: 16px;
  padding-bottom: env(safe-area-inset-bottom);
}

#app { max-width: 520px; margin: 0 auto; padding: 12px 12px 90px; min-height: 100vh; }
.loading { text-align: center; padding: 48px 0; color: var(--hint); }

.topbar { display: flex; align-items: center; gap: 10px; padding: 6px 2px 14px; }
.topbar h1 { font-size: 20px; font-weight: 700; flex: 1; }
.topbar .sub { color: var(--hint); font-size: 13px; }
.back { border: none; background: none; color: var(--link); font-size: 16px; padding: 4px 8px 4px 0; cursor: pointer; }

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 10px;
}
.card.tap { cursor: pointer; }
.card.tap:active { opacity: .7; }

.grow { flex: 1; }
.row { display: flex; align-items: center; gap: 10px; }
.muted { color: var(--hint); font-size: 13px; }
.pos { color: var(--green); }
.neg { color: var(--red); }

.btn {
  display: block; width: 100%;
  background: var(--btn); color: var(--btn-text);
  border: none; border-radius: var(--radius);
  padding: 14px; font-size: 16px; font-weight: 600;
  cursor: pointer;
}
.btn:active { opacity: .8; }
.btn.ghost { background: none; color: var(--link); font-weight: 500; }
.btn.small { width: auto; padding: 8px 14px; font-size: 14px; border-radius: 10px; display: inline-block; }

.fab {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(16px + env(safe-area-inset-bottom));
  width: calc(100% - 24px); max-width: 496px;
  box-shadow: 0 4px 16px rgba(0,0,0,.18);
  z-index: 5;
}

.tabs { display: flex; background: var(--card); border-radius: var(--radius); padding: 4px; margin-bottom: 12px; }
.tabs button {
  flex: 1; border: none; background: none; color: var(--hint);
  padding: 9px; font-size: 15px; font-weight: 600; border-radius: 10px; cursor: pointer;
}
.tabs button.on { background: var(--btn); color: var(--btn-text); }

input[type=text], input[type=number], input[inputmode] {
  width: 100%; border: none; outline: none;
  background: var(--bg2); color: var(--text);
  border-radius: 10px; padding: 12px; font-size: 16px;
}
.amount-input { font-size: 32px !important; font-weight: 700; text-align: center; padding: 16px !important; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1.5px solid var(--hint); color: var(--text); background: none;
  border-radius: 999px; padding: 7px 14px; font-size: 14px; cursor: pointer;
}
.chip.on { background: var(--btn); border-color: var(--btn); color: var(--btn-text); }

.label { font-size: 13px; color: var(--hint); margin: 14px 0 6px; font-weight: 600; text-transform: uppercase; letter-spacing: .3px; }
.usd-preview { text-align: center; color: var(--hint); font-size: 15px; margin-top: 6px; min-height: 20px; }

.exp { display: flex; align-items: center; gap: 10px; padding: 11px 0; border-bottom: 1px solid var(--bg2); }
.exp:last-child { border-bottom: none; }
.exp .desc { font-weight: 500; }
.exp .amt { text-align: right; font-weight: 600; white-space: nowrap; }
.exp .amt .muted { font-weight: 400; }
.exp .del { border: none; background: none; color: var(--hint); font-size: 17px; padding: 6px; cursor: pointer; }

.nextpay { text-align: center; padding: 18px 14px; }
.nextpay .who { font-size: 22px; font-weight: 700; margin-top: 4px; }
.nextpay .why { margin-top: 4px; }

.bal { padding: 7px 0; }
.bal .bar-wrap { position: relative; height: 10px; background: var(--bg2); border-radius: 5px; margin-top: 5px; overflow: hidden; }
.bal .bar { position: absolute; top: 0; height: 100%; border-radius: 5px; }
.bal .bar.pos { background: var(--green); left: 50%; }
.bal .bar.neg { background: var(--red); right: 50%; }
.bal .mid { position: absolute; left: 50%; top: -2px; width: 1px; height: 14px; background: var(--hint); opacity: .4; }

.transfer { display: flex; align-items: center; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--bg2); }
.transfer:last-child { border-bottom: none; }
.transfer .arrow { color: var(--hint); }
.transfer .amt { margin-left: auto; font-weight: 700; }

.devbar {
  background: #b58900; color: #fff; border-radius: 10px;
  padding: 8px 12px; margin-bottom: 12px; font-size: 13px; cursor: pointer;
}

.empty { text-align: center; color: var(--hint); padding: 28px 12px; }

.sheet-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 10;
  display: flex; align-items: flex-end;
}
.sheet {
  background: var(--bg); width: 100%; max-width: 520px; margin: 0 auto;
  border-radius: 18px 18px 0 0; padding: 18px 16px calc(20px + env(safe-area-inset-bottom));
  max-height: 92vh; overflow-y: auto;
}
.sheet h2 { font-size: 18px; margin-bottom: 12px; }