/* ============================================================
   iPlan — 트랜지션 / 애니메이션
   ============================================================ */

/* ── 뷰 전환 ── */
.ip-view {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--duration-normal) var(--ease-default),
              transform var(--duration-normal) var(--ease-default);
}

.ip-view.active {
  opacity: 1;
  transform: translateY(0);
}

/* ── 태스크 완료 애니메이션 ── */
.ip-list-item.completing {
  animation: taskComplete 0.4s var(--ease-default) forwards;
}

@keyframes taskComplete {
  0% {
    opacity: 1;
    transform: translateX(0);
  }
  50% {
    opacity: 0.6;
    transform: translateX(8px);
  }
  100% {
    opacity: 0.4;
    transform: translateX(0);
  }
}

/* ── 태스크 추가 애니메이션 ── */
.ip-list-item.entering {
  animation: taskEnter 0.3s var(--ease-default);
}

@keyframes taskEnter {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── 태스크 삭제 애니메이션 ── */
.ip-list-item.leaving {
  animation: taskLeave 0.25s var(--ease-default) forwards;
}

@keyframes taskLeave {
  to {
    opacity: 0;
    transform: translateX(-20px);
    height: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
  }
}

/* ── 토스트 ── */
@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(-8px);
  }
}

.ip-toast.leaving {
  animation: toastOut 0.2s var(--ease-default) forwards;
}

/* ── 사이드바 전환 ── */
.ip-sidebar {
  transition: width var(--duration-slow) var(--ease-default),
              transform var(--duration-slow) var(--ease-default);
}

/* ── 상세 패널 ── */
#task-detail-panel {
  transition: transform var(--duration-slow) var(--ease-default);
}

/* ── 모달 배경 ── */
#modal-layer {
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-default);
}

#modal-layer.open {
  opacity: 1;
}

/* ── 체크박스 체크 ── */
.ip-checkbox {
  transition: background var(--duration-normal) var(--ease-default),
              border-color var(--duration-normal) var(--ease-default);
}

.ip-checkbox.checked {
  animation: checkPop 0.2s var(--ease-default);
}

@keyframes checkPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* ── 드래그 앤 드롭 ── */
.ip-list-item.dragging,
.ip-task-card.dragging {
  opacity: 0.5;
  transform: rotate(2deg);
}

/* ── 유효성 검증 실패 — 흔들림 ── */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(3px); }
}

.ip-shake {
  animation: shake 0.3s var(--ease-default);
}

/* ── 태스크 리스트 순차 등장 ── */
.ip-list-item.stagger {
  opacity: 0;
  transform: translateY(8px);
  animation: taskStaggerIn 0.25s var(--ease-default) forwards;
  animation-delay: var(--stagger-delay, 0ms);
}

@keyframes taskStaggerIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── 드롭다운 열기/닫기 ── */
.ip-dropdown.opening {
  animation: dropdownIn 0.15s var(--ease-default) forwards;
}

@keyframes dropdownIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.ip-dropdown.closing {
  animation: dropdownOut 0.1s var(--ease-default) forwards;
}

@keyframes dropdownOut {
  from { opacity: 1; transform: scale(1); }
  to { opacity: 0; transform: scale(0.95); }
}

/* ── 슬라이드 트랜지션 (뷰 전환) ── */
.ip-slide-left {
  animation: slideLeft 0.3s var(--ease-default);
}

@keyframes slideLeft {
  from { opacity: 0; transform: translateX(16px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ── 바텀시트 슬라이드업 (모바일 태스크 상세) ── */
@keyframes bottomSheetUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@keyframes bottomSheetDown {
  from { transform: translateY(0); }
  to { transform: translateY(100%); }
}

.ip-bottom-sheet.entering {
  animation: bottomSheetUp 0.3s cubic-bezier(0.32, 0.72, 0, 1);
}

.ip-bottom-sheet.leaving {
  animation: bottomSheetDown 0.25s var(--ease-default) forwards;
}

/* ── 펄스 (알림 표시) ── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.ip-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* ── 리듀스드 모션 ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}