* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--tg-theme-bg-color, #ffffff);
  color: var(--tg-theme-text-color, #000000);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  overflow-x: hidden;
  min-height: 100vh;
  overscroll-behavior: none;
}

/* Hide scrollbar on filter tabs */
.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* Task completion slide-out */
.task-completing {
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s ease-out;
}

/* Bottom sheet */
.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  border-radius: 16px 16px 0 0;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
  z-index: 50;
  max-height: 80vh;
  padding: 20px 16px 32px;
}
.bottom-sheet.open {
  transform: translateY(0);
}

/* Backdrop */
.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 40;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* FAB */
.fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 28px;
  background: var(--tg-theme-button-color, #3390ec);
  color: var(--tg-theme-button-text-color, #ffffff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 30;
  border: none;
  cursor: pointer;
  transition: transform 0.2s;
}
.fab:active {
  transform: scale(0.9);
}

/* Filter tabs */
.tab {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.tab-active {
  background: var(--tg-theme-button-color, #3390ec);
  color: var(--tg-theme-button-text-color, #ffffff);
}
.tab-inactive {
  background: var(--tg-theme-secondary-bg-color, #e5e5e5);
  color: var(--tg-theme-hint-color, #999999);
}

/* Task card */
.task-card {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  background: var(--tg-theme-secondary-bg-color, #f5f5f5);
  border-radius: 12px;
  margin-bottom: 8px;
  transition: all 0.3s ease;
  gap: 12px;
}

/* Checkbox circle */
.check-circle {
  width: 24px;
  height: 24px;
  min-width: 24px;
  border-radius: 50%;
  border: 2px solid var(--tg-theme-hint-color, #ccc);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}
.check-circle:active {
  background: var(--tg-theme-button-color, #3390ec);
  border-color: var(--tg-theme-button-color, #3390ec);
}

/* Delete button */
.delete-btn {
  background: #ef4444;
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: opacity 0.2s;
}
.delete-btn:active {
  opacity: 0.7;
}

/* Form inputs */
.form-input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--tg-theme-hint-color, #ccc);
  background: var(--tg-theme-bg-color, #fff);
  color: var(--tg-theme-text-color, #000);
  font-size: 16px;
  outline: none;
  transition: border-color 0.2s;
}
.form-input:focus {
  border-color: var(--tg-theme-button-color, #3390ec);
}

/* Submit button */
.btn-primary {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  background: var(--tg-theme-button-color, #3390ec);
  color: var(--tg-theme-button-text-color, #fff);
  font-size: 16px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn-primary:active {
  opacity: 0.8;
}

/* Complete button in edit form */
.btn-complete {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  background: transparent;
  color: var(--tg-theme-button-color, #3390ec);
  font-size: 16px;
  font-weight: 600;
  border: 2px solid var(--tg-theme-button-color, #3390ec);
  cursor: pointer;
  transition: all 0.2s;
}
.btn-complete:active {
  background: var(--tg-theme-button-color, #3390ec);
  color: var(--tg-theme-button-text-color, #fff);
}

/* Confirm dialog */
.confirm-dialog {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--tg-theme-secondary-bg-color, #fff);
  border-radius: 14px;
  padding: 24px;
  z-index: 60;
  text-align: center;
  min-width: 280px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--tg-theme-secondary-bg-color, #eee) 25%,
    var(--tg-theme-bg-color, #f5f5f5) 50%,
    var(--tg-theme-secondary-bg-color, #eee) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 12px;
  height: 56px;
  margin-bottom: 8px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Empty state */
.empty-state {
  text-align: center;
  color: var(--tg-theme-hint-color, #999);
  padding: 48px 16px;
}