/* 기본 스타일 */
body {
  font-family: "HancomMalangMalang", "Noto Sans KR", sans-serif !important;
  background-color: #f8f9fa;
  color: #333;
}

.research-main {
  padding: 3rem 0;
}

.container {
  max-width: 1140px;
  padding: 0 1.5rem;
  margin: 0 auto;
}

/* 페이지 헤더 */
.page-header {
  text-align: center;
  margin-bottom: 3rem;
}

.title-heading {
  font-family: "HancomMalangMalang", sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.title-heading::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #1a73e8, #4285f4);
  margin: 0.8rem auto 0;
  border-radius: 3px;
}

.subtitle {
  font-family: "HancomMalangMalang", sans-serif;
  font-size: 1.1rem;
  color: #666;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* 연구 그리드 */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* 데스크탑: 3개 */
  gap: 30px;
  position: relative;
  min-height: 300px;
  margin: 0 auto; /* 중앙 정렬 */
  width: 80%; /* 좌우 마진 증가 (90%에서 80%로 변경) */
  max-width: 1200px; /* 최대 너비 제한 */
}

/* 로딩 인디케이터 */
.loading-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: rgba(255, 255, 255, 0.7);
  z-index: 10;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(26, 115, 232, 0.3);
  border-top-color: #1a73e8;
  border-radius: 50%;
  animation: spin 1s ease-in-out infinite;
}

.loading-text {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #666;
  font-family: "HancomMalangMalang", sans-serif;
}

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

/* 연구 카드 스타일 */
.research-card {
  display: flex;
  flex-direction: column;
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  height: 100%;
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.research-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.research-image-container {
  position: relative;
  padding-top: 56.25%; /* 16:9 비율 */
  overflow: hidden;
  background: linear-gradient(45deg, #f3f4f6, #e5e7eb);
}

.research-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.research-card:hover .research-image {
  transform: scale(1.05);
}

.research-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.research-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #333;
  font-family: "HancomMalangMalang", sans-serif;
}

.research-date {
  color: #6b7280;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  font-family: "HancomMalangMalang", sans-serif;
}

.research-description {
  font-size: 0.95rem;
  color: #4b5563;
  margin-bottom: 1.5rem;
  line-height: 1.6;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-family: "HancomMalangMalang", sans-serif;
}

.research-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid #f0f0f0;
  padding-top: 1rem;
  margin-top: auto;
}

.github-link {
  display: flex;
  align-items: center;
  color: #333;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
  font-family: "HancomMalangMalang", sans-serif;
}

.github-link i {
  margin-right: 0.5rem;
}

.github-link:hover {
  color: #1a73e8;
}

.details-button {
  background: none;
  border: none;
  color: #1a73e8;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: color 0.2s ease;
  font-family: "HancomMalangMalang", sans-serif;
}

.details-button:hover {
  color: #0d5bcd;
}

.details-button i {
  margin-left: 0.3rem;
  font-size: 0.8rem;
}

/* 노션 스타일 모달 */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.research-modal {
  background: white;
  width: 90%;
  max-width: 900px;
  height: 85vh;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  transform: translateY(30px);
  opacity: 0;
  transition: transform 0.4s ease, opacity 0.4s ease;
}

.modal-overlay.show .research-modal {
  transform: translateY(0);
  opacity: 1;
}

.modal-body {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-grow: 1;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  background: none;
  border: none;
  color: #999;
  font-size: 1.5rem;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  z-index: 10;
}

.modal-close:hover {
  background-color: #f5f5f5;
  color: #333;
}

/* 노션 스타일 헤더 */
.notion-header {
  padding: 32px 64px 24px;
  width: 100%;
  border-bottom: 1px solid #eeeeef;
}

.notion-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #37352f;
  margin-bottom: 16px;
  font-family: "HancomMalangMalang", sans-serif;
  line-height: 1.2;
}

.notion-metadata {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 8px;
}

.metadata-item {
  display: flex;
  align-items: center;
  font-size: 0.9rem;
  color: #888;
}

.metadata-item i {
  margin-right: 6px;
}

/* 깃허브 링크 스타일 추가 */
#headerGithubLink {
  transition: all 0.2s ease;
}

#headerGithubLink a {
  color: #888;
  text-decoration: none;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
}

#headerGithubLink:hover a {
  color: #0366d6;
}

#headerGithubLink i {
  margin-right: 6px;
  font-size: 1rem;
}

/* 노션 스타일 콘텐츠 */
.notion-content {
  flex: 1;
  overflow-y: auto;
  padding: 0;
  position: relative;
  background-color: #ffffff;
}

.markdown-content {
  font-family: "HancomMalangMalang", "Noto Sans KR", sans-serif;
  line-height: 1.7;
  color: #37352f;
  padding: 40px 64px 120px;
  max-width: 100%;
}

/* 마크다운 스타일링 - 노션 스타일 */
.markdown-content h1 {
  font-size: 1.875rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.3rem;
  color: #37352f;
  font-family: "HancomMalangMalang", sans-serif;
}

.markdown-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 1.8rem;
  margin-bottom: 0.8rem;
  color: #37352f;
  font-family: "HancomMalangMalang", sans-serif;
}

.markdown-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.7rem;
  color: #37352f;
  font-family: "HancomMalangMalang", sans-serif;
}

.markdown-content p {
  margin-bottom: 1.2rem;
  line-height: 1.7;
}

.markdown-content ul,
.markdown-content ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.markdown-content li {
  margin-bottom: 0.5rem;
}

.markdown-content a {
  color: #0b6ccf;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}

.markdown-content a:hover {
  color: #0352a0;
}

.markdown-content img {
  max-width: 100%;
  border-radius: 4px;
  margin: 1.5rem 0;
}

.markdown-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier,
    monospace;
  background-color: #f1f1f1;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
}

.markdown-content pre {
  background-color: #f6f6f6;
  border-radius: 4px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.markdown-content pre code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier,
    monospace;
  background-color: transparent;
  padding: 0;
  font-size: 0.9em;
  line-height: 1.5;
}

.markdown-content blockquote {
  border-left: 3px solid #ddd;
  margin-left: 0;
  margin-right: 0;
  padding-left: 1rem;
  color: #666;
}

/* Mermaid 다이어그램 스타일 */
.mermaid-diagram {
  margin: 2rem 0;
  padding: 1rem;
  background-color: #f9f9f9;
  border-radius: 8px;
  overflow-x: auto;
  text-align: center;
}

.mermaid-diagram svg {
  max-width: 100%;
  height: auto !important;
}

/* 모달 푸터 - 스타일 조정 */
.modal-footer {
  padding: 16px 64px;
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid #eeeeef;
  background: white;
}

/* 반응형 스타일 */
@media (max-width: 1200px) {
  .research-grid {
    width: 85%; /* 좀 더 넓게 사용 (95%에서 85%로 변경) */
  }
}

@media (max-width: 992px) {
  .research-grid {
    grid-template-columns: repeat(2, 1fr); /* 태블릿: 2개 */
    gap: 25px;
    width: 85%; /* 태블릿에서도 여유 있는 마진 (92%에서 85%로 변경) */
  }
}

@media (max-width: 767px) {
  .research-grid {
    grid-template-columns: 1fr; /* 모바일: 1개 */
    gap: 20px;
    width: 80%; /* 모바일에서 여유 있는 마진 (85%에서 80%로 변경) */
  }

  .notion-header {
    padding: 24px 24px 16px;
  }

  .notion-title {
    font-size: 1.8rem;
  }

  .markdown-content {
    padding: 24px 24px 80px;
  }

  .modal-footer {
    padding: 16px 24px;
  }
}

@media (max-width: 640px) {
  .research-grid {
    grid-template-columns: 1fr;
    padding: 0 15px;
  }

  .title-heading {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .modal-header {
    padding: 1.5rem 1.5rem 1rem;
  }

  .modal-title {
    font-size: 1.5rem;
  }

  .modal-content {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .notion-title {
    font-size: 1.75rem;
  }
}

/* body에 모달 열림 상태 표시 */
body.modal-open {
  overflow: hidden;
}