:root {
  --bg: var(--tg-theme-bg-color, #17212b);
  --text: var(--tg-theme-text-color, #ffffff);
  --hint: var(--tg-theme-hint-color, #8a97a3);
  --card: var(--tg-theme-secondary-bg-color, #232e3c);
  --accent: var(--tg-theme-button-color, #3390ec);
  --accent-text: var(--tg-theme-button-text-color, #ffffff);
  --link: var(--tg-theme-link-color, #62aaff);
  --green: #37c66f;
  --red: #f0564f;
  --hairline: color-mix(in srgb, var(--hint) 22%, transparent);
  --elevate: color-mix(in srgb, var(--text) 6%, transparent);

  /* safe-area отступы задаёт JS из Telegram.WebApp */
  --inset-top: 0px;
  --inset-bottom: 0px;
}

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

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.35;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 520px;
  margin: 0 auto;
  padding: calc(var(--inset-top) + 14px) 16px calc(var(--inset-bottom) + 32px);
  min-height: 100vh;
}

/* --- Типографика --- */
h1 { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; }
.page-title { margin-bottom: 16px; }
h2 { font-size: 13px; font-weight: 600; color: var(--hint); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 10px; }
.muted { color: var(--hint); }
.sub { color: var(--hint); font-size: 14px; margin-top: 3px; }
.num { font-variant-numeric: tabular-nums; }

.row { display: flex; align-items: center; gap: 10px; }
.spacer { flex: 1; }

/* --- Карточки --- */
.card {
  background: var(--card);
  border-radius: 18px;
  padding: 16px;
  margin-bottom: 12px;
}
.card.tight { padding: 6px 16px; }

/* --- Кнопки --- */
button.primary {
  width: 100%; padding: 15px; border: none; border-radius: 14px;
  background: var(--accent); color: var(--accent-text);
  font-size: 16px; font-weight: 700; cursor: pointer;
  transition: transform .08s ease, opacity .15s;
}
button.primary:active { transform: scale(0.985); opacity: .9; }

button.secondary {
  width: 100%; padding: 13px; border: none; border-radius: 13px;
  background: var(--elevate); color: var(--text);
  font-size: 15px; font-weight: 600; cursor: pointer;
}
button.secondary:active { opacity: .8; }

button.ghost {
  border: none; background: none; color: var(--link);
  font-size: 15px; font-weight: 600; cursor: pointer; padding: 6px 2px;
}

.fab-gap { margin-top: 16px; }

/* --- Поля ввода --- */
input, select {
  width: 100%; padding: 14px; border: none; border-radius: 13px;
  background: var(--elevate); color: var(--text); font-size: 16px; margin-bottom: 12px;
  outline: none;
}
input::placeholder { color: var(--hint); }
input:focus, select:focus { box-shadow: 0 0 0 2px var(--accent) inset; }
label.field { display: block; font-size: 13px; color: var(--hint); margin: 4px 2px 7px; }

/* --- Список тусовок --- */
.event-item { display: flex; align-items: center; gap: 12px; cursor: pointer; }
.event-item:active { opacity: .7; }
.event-item .avatar {
  width: 46px; height: 46px; border-radius: 14px; flex-shrink: 0;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.event-item .title { font-weight: 700; font-size: 17px; }
.event-item .chev { color: var(--hint); font-size: 22px; margin-left: auto; }

/* --- Участники --- */
.members { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  background: var(--elevate); border-radius: 20px; padding: 6px 13px; font-size: 14px; font-weight: 500;
}
.chip.me { background: color-mix(in srgb, var(--accent) 20%, transparent); }

/* --- Балансы --- */
.balance-line { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; }
.balance-line + .balance-line { border-top: 1px solid var(--hairline); }
.pos { color: var(--green); font-weight: 700; }
.neg { color: var(--red); font-weight: 700; }
.zero { color: var(--hint); font-weight: 500; }

/* --- Траты --- */
.expense { display: flex; align-items: center; gap: 12px; padding: 13px 0; }
.expense + .expense { border-top: 1px solid var(--hairline); }
.expense .info { flex: 1; min-width: 0; }
.expense .desc { font-weight: 600; font-size: 16px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.expense .meta { color: var(--hint); font-size: 13px; margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.expense .amount { font-weight: 700; white-space: nowrap; font-variant-numeric: tabular-nums; flex-shrink: 0; }
.expense .del {
  background: none; border: none; color: var(--hint); font-size: 15px; cursor: pointer;
  padding: 6px 4px; margin-right: -4px; opacity: .5; flex-shrink: 0;
}
.expense .del:active { color: var(--red); opacity: 1; }

/* --- Переводы (Итоги) --- */
.transfer { display: flex; align-items: center; gap: 10px; padding: 13px 0; }
.transfer + .transfer { border-top: 1px solid var(--hairline); }
.transfer .who { font-weight: 600; }
.transfer .arrow { color: var(--hint); font-size: 18px; }
.transfer .sum { margin-left: auto; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }

/* --- Сегментированные вкладки --- */
.tabs { display: flex; background: var(--card); border-radius: 14px; padding: 4px; margin: 4px 0 14px; }
.tab {
  flex: 1; padding: 11px; border: none; border-radius: 11px;
  background: transparent; color: var(--hint); font-weight: 600; font-size: 15px; cursor: pointer;
  transition: background .15s, color .15s;
}
.tab.active { background: var(--accent); color: var(--accent-text); }

/* --- Чекбоксы участников --- */
.check-list { display: flex; flex-direction: column; gap: 4px; margin-bottom: 4px; }
.check {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  border-radius: 12px; cursor: pointer; background: var(--elevate); font-size: 16px;
}
.check input { width: 20px; height: 20px; margin: 0; accent-color: var(--accent); flex-shrink: 0; }

/* --- Пустые состояния --- */
.empty { text-align: center; color: var(--hint); padding: 36px 20px; font-size: 15px; }
.empty .big { font-size: 46px; margin-bottom: 12px; }

/* --- Нижняя модалка --- */
.overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: flex-end; z-index: 50;
  animation: fade .18s ease;
}
.sheet {
  background: var(--bg); width: 100%; max-width: 520px; margin: 0 auto;
  border-radius: 22px 22px 0 0; padding: 22px 18px calc(var(--inset-bottom) + 26px);
  max-height: 92vh; overflow-y: auto;
  animation: slideUp .24s cubic-bezier(.2,.8,.2,1);
}
.sheet h1 { font-size: 22px; margin-bottom: 18px; }
.grabber { width: 38px; height: 4px; border-radius: 3px; background: var(--hint); opacity: .35; margin: -8px auto 16px; }

@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }

/* --- Тост --- */
#toast {
  position: fixed; bottom: calc(var(--inset-bottom) + 18px); left: 16px; right: 16px;
  max-width: 488px; margin: 0 auto;
  background: color-mix(in srgb, var(--text) 88%, var(--bg));
  color: var(--bg); padding: 14px 16px; border-radius: 14px; text-align: center;
  font-size: 14px; font-weight: 500; z-index: 100;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  animation: slideUp .2s ease;
}
#toast.error { background: var(--red); color: #fff; }