/* SeoArt Product ReadMore CSS v2.0.0 - CLS 방지 + 기존 매칭 로직 유지 */

/* ==============================================
   1. CLS 방지용 Critical CSS (기존 매칭 로직 활용)
   ============================================== */

/* 기본적으로 .row.product-page-mar 요소들 숨김 */
.product-page-sections
  .product-section
  .row
  .panel.entry-content
  > div
  .row.product-page-mar {
  display: none !important;
  opacity: 0 !important;
  transition: opacity 0.3s ease-in-out;
  transform: translateZ(0); /* 하드웨어 가속 */
}

/* JavaScript에서 !important로 강제 적용하므로 CSS 선택자는 단순하게 유지 */
/* 애니메이션을 위한 기본 transition만 설정 */
.row.product-page-mar {
  transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
  transform: translateZ(0); /* 하드웨어 가속 */
}

/* ==============================================
   2. ReadMore 컨테이너 및 버튼 스타일
   ============================================== */
.seoart-readmore-container {
  position: relative;
  margin: 20px 0;
  text-align: center;
  transform: translateZ(0); /* 하드웨어 가속 */
  will-change: auto;
}

.seoart-readmore-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  margin: 20px auto;
  background: transparent;
  color: #4f46e5;
  border: 2px solid #4f46e5;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
  position: relative;
  overflow: hidden;
  width: fit-content;

  /* 하드웨어 가속 */
  transform: translateZ(0);
  will-change: transform, box-shadow;
  backface-visibility: hidden;
  perspective: 1000px;

  /* 터치 디바이스 최적화 */
  touch-action: manipulation;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;

  /* 접근성 */
  outline: 2px solid transparent;
  outline-offset: 2px;
}

.seoart-readmore-button:hover {
  transform: translateY(-1px);
  background-color: #4f46e5;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
  color: white;
}

.seoart-readmore-button:active {
  transform: translateY(0) translateZ(0);
}

.seoart-readmore-button:focus {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* 버튼 내부 빛 효과 */
.seoart-readmore-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s;
}

.seoart-readmore-button:hover::before {
  left: 100%;
}

/* 아이콘 스타일 */
.seoart-readmore-icon {
  margin-left: 8px;
  transition: transform 0.3s ease;
  font-size: 12px;
  transform: translateZ(0);
  will-change: transform;
}

.seoart-readmore-button.expanded .seoart-readmore-icon {
  transform: rotate(180deg) translateZ(0);
}

/* ==============================================
   3. 터치 디바이스 최적화
   ============================================== */
@media (hover: none) and (pointer: coarse) {
  .seoart-readmore-button {
    padding: 14px 26px;
    min-height: 48px; /* 터치 접근성 최소 크기 */
    font-size: 15px;
  }

  .seoart-readmore-button:hover {
    transform: none;
  }

  .seoart-readmore-button:active {
    transform: scale(0.98) translateZ(0);
    transition: transform 0.1s ease;
  }
}

/* ==============================================
   4. 반응형 디자인
   ============================================== */
@media (max-width: 768px) {
  .seoart-readmore-button {
    padding: 10px 20px;
    font-size: 13px;
    margin: 15px auto;
    border-radius: 20px;
  }
}

@media (max-width: 480px) {
  .seoart-readmore-button {
    width: 100%;
    max-width: 300px;
    text-align: center;
    padding: 12px 16px;
    font-size: 14px;
    margin: 15px auto;
  }
}

/* ==============================================
   5. Flatsome 테마 호환성
   ============================================== */
.product-page-sections .seoart-readmore-container {
  margin: 20px 0;
  text-align: center;
}

.product-page-sections .seoart-readmore-button {
  margin: 20px auto;
  display: inline-flex;
}

/* ==============================================
   6. 부드러운 전환 효과 (JavaScript !important와 함께 작동)
   ============================================== */
@keyframes fadeInSlide {
  from {
    opacity: 0;
    transform: translateY(-10px) translateZ(0);
  }
  to {
    opacity: 1;
    transform: translateY(0) translateZ(0);
  }
}

@keyframes fadeOutSlide {
  from {
    opacity: 1;
    transform: translateY(0) translateZ(0);
  }
  to {
    opacity: 0;
    transform: translateY(-10px) translateZ(0);
  }
}

/* 부드러운 전환을 위한 기본 transition */
.row.product-page-mar.seoart-readmore-showing {
  animation: fadeInSlide 0.3s ease-out;
}

.row.product-page-mar.seoart-readmore-hiding {
  animation: fadeOutSlide 0.3s ease-out;
}

/* ==============================================
   7. 다크모드 지원 비활성화 - 라이트모드로 고정
   ============================================== */
/* 다크모드 설정이 있어도 항상 라이트모드로 표시됩니다 */

/* ==============================================
   8. JavaScript 비활성화 시 폴백
   ============================================== */
.no-js
  .product-page-sections
  .product-section
  .row
  .panel.entry-content
  > div
  .row.product-page-mar {
  display: block !important;
  opacity: 1 !important;
  max-height: none !important;
}

.no-js .seoart-readmore-button {
  display: none !important;
}

/* noscript 환경에서도 동일한 효과 */
noscript
  .product-page-sections
  .product-section
  .row
  .panel.entry-content
  > div
  .row.product-page-mar {
  display: block !important;
  opacity: 1 !important;
}

/* ==============================================
   9. 로딩 상태
   ============================================== */
.seoart-readmore-loading {
  opacity: 0.7;
  pointer-events: none;
  cursor: not-allowed;
}

.seoart-readmore-loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid transparent;
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* ==============================================
   10. 성능 최적화 (JavaScript !important 방식에 최적화)
   ============================================== */
/* GPU 레이어 생성을 위한 최적화 */
.seoart-readmore-container,
.seoart-readmore-button,
.row.product-page-mar,
.seoart-readmore-icon {
  will-change: auto;
}

/* 애니메이션 동안에만 will-change 활성화 */
.seoart-readmore-container:hover .seoart-readmore-button,
.row.product-page-mar.seoart-readmore-showing,
.row.product-page-mar.seoart-readmore-hiding {
  will-change: transform, opacity;
}

/* 접근성 향상: 애니메이션 비활성화 선호 시 */
@media (prefers-reduced-motion: reduce) {
  .seoart-readmore-button,
  .row.product-page-mar,
  .seoart-readmore-icon,
  .seoart-readmore-button::before {
    transition: none !important;
    animation: none !important;
  }

  .row.product-page-mar.seoart-readmore-showing,
  .row.product-page-mar.seoart-readmore-hiding {
    animation: none !important;
  }
}

/* ==============================================
   11. 디버깅 및 개발용 (WP_DEBUG 시에만 표시)
   ============================================== */
.seoart-debug-mode .seoart-readmore-container {
  border: 2px dashed #ff6b6b;
  background: rgba(255, 107, 107, 0.1);
}

.seoart-debug-mode .row.product-page-mar {
  border: 1px solid #4ecdc4;
  background: rgba(78, 205, 196, 0.1);
}