/**
 * modern-interactions.css - 현대적 인터랙션 & 애니메이션
 * 마이크로 인터랙션, 스무스 애니메이션, 피드백 시스템
 */

/* ===== 페이지 전환 애니메이션 ===== */
.page-transition {
  animation: fadeInUp var(--duration-500) var(--ease-out);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-transition-fast {
  animation: fadeIn var(--duration-300) var(--ease-out);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== 호버 효과 개선 ===== */
.hover-lift {
  transition: all var(--duration-200) var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hover-glow {
  position: relative;
  transition: all var(--duration-300) var(--ease-out);
}

.hover-glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(45deg, var(--primary-500), var(--secondary-500));
  border-radius: inherit;
  opacity: 0;
  z-index: -1;
  transition: opacity var(--duration-300);
  filter: blur(6px);
}

.hover-glow:hover::before {
  opacity: 0.7;
}

/* ===== 로딩 애니메이션 개선 ===== */
.loading-dots {
  display: inline-flex;
  gap: var(--space-1);
}

.loading-dot {
  width: 8px;
  height: 8px;
  background: var(--primary-500);
  border-radius: 50%;
  animation: loadingPulse 1.4s infinite ease-in-out;
}

.loading-dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dot:nth-child(2) { animation-delay: -0.16s; }
.loading-dot:nth-child(3) { animation-delay: 0s; }

@keyframes loadingPulse {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

.loading-spinner-modern {
  width: 40px;
  height: 40px;
  position: relative;
}

.loading-spinner-modern::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 3px solid transparent;
  border-top: 3px solid var(--primary-500);
  border-radius: 50%;
  animation: spin var(--duration-700) linear infinite;
}

.loading-spinner-modern::after {
  content: '';
  position: absolute;
  inset: 6px;
  border: 2px solid transparent;
  border-top: 2px solid var(--secondary-500);
  border-radius: 50%;
  animation: spin var(--duration-500) linear infinite reverse;
}

/* ===== 입력 필드 포커스 효과 ===== */
.form-input-modern {
  position: relative;
  border: 2px solid var(--border);
  background: var(--surface);
  transition: all var(--duration-200) var(--ease-out);
}

.form-input-modern:focus {
  border-color: var(--primary-500);
  transform: translateY(-1px);
  box-shadow: 
    0 4px 12px rgba(59, 130, 246, 0.15),
    0 0 0 4px rgba(59, 130, 246, 0.1);
}

.form-group-modern {
  position: relative;
  margin-bottom: var(--space-6);
}

.form-label-floating {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  background: var(--surface);
  padding: 0 var(--space-2);
  color: var(--text-muted);
  transition: all var(--duration-200) var(--ease-out);
  pointer-events: none;
}

.form-input-modern:focus + .form-label-floating,
.form-input-modern:not(:placeholder-shown) + .form-label-floating {
  top: 0;
  font-size: var(--font-size-sm);
  color: var(--primary-500);
  transform: translateY(-50%);
}

/* ===== 버튼 인터랙션 개선 ===== */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

.btn-ripple::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width var(--duration-300) ease, height var(--duration-300) ease;
}

.btn-ripple:active::before {
  width: 300px;
  height: 300px;
}

.btn-pulse {
  animation: buttonPulse 2s infinite;
}

@keyframes buttonPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
  }
}

/* ===== 카드 인터랙션 ===== */
.card-interactive {
  transition: all var(--duration-300) var(--ease-out);
  cursor: pointer;
}

.card-interactive:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

.card-interactive:active {
  transform: translateY(-2px) scale(1.01);
  transition-duration: var(--duration-75);
}

.card-flip {
  perspective: 1000px;
}

.card-flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform var(--duration-500);
  transform-style: preserve-3d;
}

.card-flip:hover .card-flip-inner {
  transform: rotateY(180deg);
}

.card-flip-front,
.card-flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: inherit;
}

.card-flip-back {
  transform: rotateY(180deg);
}

/* ===== 프로그레스 바 애니메이션 ===== */
.progress-bar-animated {
  position: relative;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  height: 8px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
  border-radius: inherit;
  transition: width var(--duration-500) var(--ease-out);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.6),
    transparent
  );
  animation: progressShimmer 2s infinite;
}

@keyframes progressShimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ===== 토스트 알림 ===== */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  min-width: 300px;
  max-width: 400px;
  transform: translateX(100%);
  animation: toastSlideIn var(--duration-300) var(--ease-out) forwards;
}

.toast.hiding {
  animation: toastSlideOut var(--duration-200) var(--ease-in) forwards;
}

@keyframes toastSlideIn {
  to { transform: translateX(0); }
}

@keyframes toastSlideOut {
  to { transform: translateX(100%); }
}

.toast-success {
  border-left: 4px solid var(--success-500);
}

.toast-error {
  border-left: 4px solid var(--error-500);
}

.toast-warning {
  border-left: 4px solid var(--warning-500);
}

.toast-info {
  border-left: 4px solid var(--primary-500);
}

/* 토스트 내용 스타일링 */
.toast .flex {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.toast .flex-1 {
  flex: 1;
}

.toast .items-start {
  align-items: flex-start;
}

.toast .gap-3 {
  gap: 0.75rem;
}

.toast-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  font-size: 1rem;
}

.toast-success .toast-icon {
  color: var(--success-500);
}

.toast-error .toast-icon {
  color: var(--error-500);
}

.toast-warning .toast-icon {
  color: var(--warning-500);
}

.toast-info .toast-icon {
  color: var(--primary-500);
}

.toast-message {
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--text-primary);
  font-weight: 500;
}

.toast-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  transition: color var(--duration-200);
}

.toast-close:hover {
  color: var(--text-primary);
  background-color: var(--surface-secondary);
}

/* ===== 모달 애니메이션 개선 ===== */
.modal-overlay-modern {
  backdrop-filter: blur(8px);
  animation: modalBackdropFadeIn var(--duration-300) var(--ease-out);
}

@keyframes modalBackdropFadeIn {
  from { 
    opacity: 0;
    backdrop-filter: blur(0);
  }
  to { 
    opacity: 1;
    backdrop-filter: blur(8px);
  }
}

.modal-modern {
  animation: modalSlideInBounce var(--duration-500) var(--ease-bounce);
}

@keyframes modalSlideInBounce {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.7) rotateX(45deg);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1) rotateX(0deg);
  }
}

/* ===== 드롭다운 메뉴 애니메이션 ===== */
.dropdown-menu {
  transform: translateY(-10px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-200) var(--ease-out);
}

.dropdown-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.dropdown-item {
  transition: all var(--duration-150) var(--ease-out);
}

.dropdown-item:hover {
  background: var(--surface-alt);
  transform: translateX(4px);
}

/* ===== 스크롤 애니메이션 ===== */
.fade-in-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--duration-700) var(--ease-out);
}

.fade-in-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all var(--duration-500) var(--ease-out);
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all var(--duration-500) var(--ease-out);
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ===== 스켈레톤 로딩 ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--gray-200) 25%,
    var(--gray-100) 50%,
    var(--gray-200) 75%
  );
  background-size: 200% 100%;
  animation: skeletonLoading 1.5s infinite;
  border-radius: var(--radius-md);
}

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

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-text:last-child {
  width: 60%;
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.skeleton-button {
  height: 40px;
  width: 120px;
  border-radius: var(--radius-lg);
}

/* ===== 성공/에러 상태 애니메이션 ===== */
.success-checkmark {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--success-500);
  position: relative;
  animation: successPop var(--duration-500) var(--ease-bounce);
}

.success-checkmark::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 12px;
  border: 3px solid white;
  border-top: none;
  border-right: none;
  transform: translate(-50%, -60%) rotate(-45deg);
  animation: checkmarkDraw var(--duration-300) var(--ease-out) var(--duration-200);
}

@keyframes successPop {
  0% { transform: scale(0); }
  80% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes checkmarkDraw {
  0% { 
    width: 0; 
    height: 0; 
  }
  100% { 
    width: 20px; 
    height: 12px; 
  }
}

.error-shake {
  animation: errorShake var(--duration-500) var(--ease-out);
}

@keyframes errorShake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-2px); }
  20%, 40%, 60%, 80% { transform: translateX(2px); }
}

/* ===== 상호작용 피드백 ===== */
.feedback-bounce {
  animation: feedbackBounce var(--duration-300) var(--ease-bounce);
}

@keyframes feedbackBounce {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.feedback-wiggle {
  animation: feedbackWiggle var(--duration-500) var(--ease-out);
}

@keyframes feedbackWiggle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-2deg); }
  75% { transform: rotate(2deg); }
}

/* ===== 터치 피드백 (모바일) ===== */
@media (hover: none) and (pointer: coarse) {
  .btn:active {
    transform: scale(0.96);
    transition-duration: var(--duration-75);
  }
  
  .card-interactive:active {
    transform: scale(0.98);
    transition-duration: var(--duration-75);
  }
  
  .mobile-menu-link:active,
  .bottom-nav-link:active {
    background: var(--primary-100);
    transition-duration: var(--duration-75);
  }
}

/* ===== 접근성 개선 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .hover-lift:hover {
    transform: none;
  }
  
  .card-interactive:hover {
    transform: none;
  }
}

/* 고대비 모드 지원 */
@media (prefers-contrast: high) {
  .btn-ripple::before {
    background: rgba(0, 0, 0, 0.5);
  }
  
  .skeleton {
    background: repeating-linear-gradient(
      90deg,
      #000 0px,
      #000 1px,
      transparent 1px,
      transparent 4px
    );
  }
}

/* ===== 다크 모드 애니메이션 조정 ===== */
@media (prefers-color-scheme: dark) {
  .skeleton {
    background: linear-gradient(
      90deg,
      var(--gray-700) 25%,
      var(--gray-600) 50%,
      var(--gray-700) 75%
    );
  }
  
  .btn-ripple::before {
    background: rgba(255, 255, 255, 0.2);
  }
  
  .progress-bar-fill::after {
    background: linear-gradient(
      90deg,
      transparent,
      rgba(255, 255, 255, 0.3),
      transparent
    );
  }
}