/**
 * SEO ReadMore Plugin Styles
 * 
 * 심플하고 깔끔한 접기/펼치기 스타일링
 */

/* ========================================
   기본 변수 설정
======================================== */
:root {
  --seo-readmore-primary: #0073aa;
  --seo-readmore-primary-hover: #005a87;
  --seo-readmore-text: #333333;
  --seo-readmore-border: #e1e1e1;
  --seo-readmore-bg: #ffffff;
  --seo-readmore-shadow: rgba(0, 0, 0, 0.1);
  --seo-readmore-transition: 0.3s ease;
  
  /* 동적 설정용 변수 (JavaScript에서 업데이트) */
  --seo-readmore-animation-speed: 300ms;
  --seo-readmore-animation-enabled: 1;
}

/* ========================================
   숏코드 마커 (항상 숨김)
======================================== */
.seo-readmore-marker {
  display: none !important;
  visibility: hidden !important;
  height: 0 !important;
  width: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  border: none !important;
  overflow: hidden !important;
}

/* ========================================
   메인 컨테이너
======================================== */
.seo-readmore-container {
  position: relative;
  margin: 0;
  padding: 0;
}

/* ========================================
   접힘 콘텐츠 영역
======================================== */
.seo-readmore-content {
  overflow: hidden;
  transition: max-height calc(var(--seo-readmore-animation-speed) * var(--seo-readmore-animation-enabled));
  max-height: 0;
}

.seo-readmore-content.expanded {
  max-height: 2000px; /* 충분히 큰 값 */
}

/* 애니메이션 비활성화 - CSS 변수로 제어 */
.seo-readmore-no-animation .seo-readmore-content {
  --seo-readmore-animation-enabled: 0;
}

/* ========================================
   토글 버튼 (기본 스타일)
======================================== */
.seo-readmore-toggle {
  display: inline-block;
  margin: 10px 0 5px 0;
  padding: 8px 16px;
  background: transparent;
  color: var(--seo-readmore-primary);
  border: 1px solid var(--seo-readmore-primary);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: all calc(var(--seo-readmore-animation-speed) * var(--seo-readmore-animation-enabled));
  
  /* 기본 버튼 스타일 리셋 */
  outline: none;
  box-shadow: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.seo-readmore-toggle:hover {
  background: var(--seo-readmore-primary);
  color: white;
  border-color: var(--seo-readmore-primary-hover);
  text-decoration: none;
}

/* ========================================
   토글 링크 (심플 스타일)
======================================== */
.seo-readmore-toggle.link-style {
  display: inline;
  margin: 0 0 0 0.25em;  /* 왼쪽에만 아주 작은 여백 */
  padding: 0;
  background: none !important;
  border: none !important;
  border-radius: 0 !important;
  font-size: inherit;
  font-weight: 400;
  color: var(--seo-readmore-primary);
  text-decoration: underline;
  box-shadow: none !important;
  vertical-align: baseline;
}

.seo-readmore-toggle.link-style:hover {
  background: none !important;
  color: var(--seo-readmore-primary-hover);
  text-decoration: none;
}

.seo-readmore-toggle.link-style:focus {
  outline: 1px dotted var(--seo-readmore-primary);
  outline-offset: 1px;
}

.seo-readmore-toggle:focus {
  outline: 2px solid var(--seo-readmore-primary);
  outline-offset: 2px;
}

.seo-readmore-toggle:active {
  transform: translateY(1px);
}

/* 버튼 아이콘 (쉐브론 스타일) */
.seo-readmore-toggle::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 6px;
  vertical-align: middle;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 4px solid currentColor;
  transition: transform calc(var(--seo-readmore-animation-speed) * var(--seo-readmore-animation-enabled));
}

/* 링크 스타일에는 더 작은 쉐브론 */
.seo-readmore-toggle.link-style::after {
  width: 0;
  height: 0;
  margin-left: 4px;
  border-top: 3px solid transparent;
  border-bottom: 3px solid transparent;
  border-left: 3px solid currentColor;
}

.seo-readmore-toggle.expanded::after {
  transform: rotate(90deg);
}

/* ========================================
   페이드 효과 (선택사항)
======================================== */
.seo-readmore-fade {
  position: relative;
}

.seo-readmore-fade::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 30px;
  background: linear-gradient(transparent, var(--seo-readmore-bg));
  pointer-events: none;
  opacity: 1;
  transition: opacity calc(var(--seo-readmore-animation-speed) * var(--seo-readmore-animation-enabled));
}

.seo-readmore-fade.expanded::before {
  opacity: 0;
}

/* ========================================
   반응형 디자인
======================================== */

/* 모바일 */
@media screen and (max-width: 768px) {
  .seo-readmore-toggle {
    width: 100%;
    text-align: center;
    padding: 12px 16px;
    font-size: 16px;
  }
  
  /* 링크 스타일은 모바일에서도 인라인 유지 */
  .seo-readmore-toggle.link-style {
    width: auto !important;
    text-align: left !important;
    padding: 0 !important;
    font-size: inherit !important;
  }
  
  .seo-readmore-content {
    max-height: 0;
  }
  
  .seo-readmore-content.expanded {
    max-height: 3000px; /* 모바일에서는 더 큰 값 */
  }
}

/* 태블릿 */
@media screen and (min-width: 769px) and (max-width: 1024px) {
  .seo-readmore-toggle {
    padding: 10px 18px;
    font-size: 15px;
  }
}

/* ========================================
   테마 호환성
======================================== */

/* 일반적인 WordPress 테마 스타일 재정의 */
.term-description .seo-readmore-toggle,
.post-content .seo-readmore-toggle,
.entry-content .seo-readmore-toggle {
  font-family: inherit;
  line-height: inherit;
}

/* 버튼 스타일 충돌 방지 */
.seo-readmore-toggle {
  background-image: none !important;
  box-shadow: none !important;
  text-shadow: none !important;
  border-radius: 4px !important;
}

/* ========================================
   접근성 개선
======================================== */

/* 스크린 리더용 텍스트 */
.seo-readmore-sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* 포커스 표시 강화 */
.seo-readmore-toggle:focus-visible {
  outline: 3px solid var(--seo-readmore-primary);
  outline-offset: 2px;
}

/* ========================================
   모션 감소 설정 지원
======================================== */
@media (prefers-reduced-motion: reduce) {
  .seo-readmore-content,
  .seo-readmore-toggle,
  .seo-readmore-toggle::after,
  .seo-readmore-fade::before {
    transition: none !important;
    animation: none !important;
  }
  
  .seo-readmore-toggle:active {
    transform: none !important;
  }
}

/* ========================================
   로딩 상태 (JavaScript에서 사용)
======================================== */
.seo-readmore-loading .seo-readmore-toggle {
  opacity: 0.6;
  cursor: wait;
  pointer-events: none;
}

.seo-readmore-loading .seo-readmore-toggle::after {
  border-top-color: transparent;
  border-right-color: currentColor;
  animation: seo-readmore-spin 0.8s linear infinite;
}

@keyframes seo-readmore-spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   다크 모드 비활성화 - 라이트 모드 고정
======================================== */
/* 다크 모드 설정이 있어도 항상 라이트 모드로 표시됩니다 */

/* ========================================
   특정 컨테이너 최적화
======================================== */

/* 카테고리 설명 영역 */
.term-description .seo-readmore-container {
  margin: 15px 0;
}

.term-description .seo-readmore-toggle {
  margin-top: 15px;
  margin-bottom: 10px;
}

/* 포스트 콘텐츠 영역 */
.post-content .seo-readmore-container,
.entry-content .seo-readmore-container {
  margin: 20px 0;
}

/* ========================================
   미세 조정
======================================== */

/* 텍스트 선택 방지 (버튼에서) */
.seo-readmore-toggle {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* 인쇄 시 모든 콘텐츠 표시 */
@media print {
  .seo-readmore-content {
    max-height: none !important;
    overflow: visible !important;
  }
  
  .seo-readmore-toggle {
    display: none !important;
  }
  
  .seo-readmore-fade::before {
    display: none !important;
  }
}