* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--tg-theme-bg-color, #ffffff);
  color: var(--tg-theme-text-color, #000000);
  padding-bottom: 24px;
}

#chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px;
  position: sticky;
  top: 0;
  background: var(--tg-theme-bg-color, #ffffff);
  z-index: 1;
}

.chip {
  flex: 0 0 auto;
  padding: 6px 14px;
  border-radius: 16px;
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  color: var(--tg-theme-text-color, #000000);
  font-size: 14px;
  white-space: nowrap;
}

.chip.active {
  background: var(--tg-theme-button-color, #2481cc);
  color: var(--tg-theme-button-text-color, #ffffff);
}

.group-title {
  padding: 12px 16px 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--tg-theme-hint-color, #999999);
  text-transform: uppercase;
}

.task {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--tg-theme-secondary-bg-color, #f0f0f0);
}

.task input[type="checkbox"] {
  margin-top: 3px;
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
}

.task-body {
  flex: 1;
  min-width: 0;
}

.task-text {
  font-size: 15px;
  line-height: 1.35;
  word-break: break-word;
}

.task-meta {
  margin-top: 4px;
  font-size: 12px;
  color: var(--tg-theme-hint-color, #999999);
}

.task-meta .overdue {
  color: #e53935;
  font-weight: 600;
}

.delete-btn {
  flex: 0 0 auto;
  background: none;
  border: none;
  font-size: 18px;
  padding: 4px;
  cursor: pointer;
  opacity: 0.6;
}

.empty {
  text-align: center;
  color: var(--tg-theme-hint-color, #999999);
  padding: 40px 16px;
}

.hidden {
  display: none;
}