/* ===================================================================
   커뮤니티 프론트엔드 - 커스텀 CSS
   Bootstrap 5.3.8 기반 - 필수 커스텀 스타일만 포함
   =================================================================== */

/* ===== Bootstrap 테마 변수 정의 ===== */
:root {
  /* 브랜드 컬러 */
  --bs-primary: #3b82f6;
  --bs-primary-rgb: 59, 130, 246;
  
  /* 텍스트 컬러 */
  --bs-body-color: #1f2937;
  --bs-secondary-color: #6b7280;
  --color-text-muted: #9ca3af;
  
  /* 폰트 크기 */
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 1.875rem;    /* 30px */
  --font-size-4xl: 2.25rem;     /* 36px */
  
  /* 게시물 관련 폰트 크기 */
  --post-card-title-size: 1.25rem;      /* 게시물 카드 제목 */
  --post-detail-title-size: 2.5rem;     /* 게시물 상세 제목 */
  --post-author-name-size: 0.875rem;    /* 작성자 이름 */
  --post-meta-size: 0.875rem;           /* 날짜, 통계 등 */
  
  /* 간격 */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  
  /* 테두리 */
  --bs-border-color: #e5e7eb;
  --bs-border-radius: 8px;
  --bs-border-radius-sm: 6px;
  --bs-border-radius-lg: 12px;
  
  /* 배경 */
  --color-bg-hover: #f3f4f6;
  
  /* 애니메이션 */
  --transition-fast: 0.15s ease;
}

/* ===== 전역 스타일 ===== */
body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

/* ===== Bootstrap 폼 오버라이드 ===== */
.form-control {
  border-width: 1.5px;
  transition: all var(--transition-fast);
}

.form-control:focus {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.08);
}

.form-control::placeholder {
  color: var(--color-text-muted);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: #374151;
  letter-spacing: -0.01em;
}

/* ===== Bootstrap 버튼 오버라이드 ===== */
.btn {
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background-color: #2563eb;
  border-color: #2563eb;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
}

/* ===== 링크 스타일 ===== */
a {
  transition: color var(--transition-fast);
}

/* ===== 모달 스타일 ===== */
.modal-fast.fade .modal-dialog {
  transition: transform var(--transition-fast);
}

.modal-fast.show .modal-dialog {
  transform: none;
}

.modal-fast .modal-content {
  border-radius: 12px;
  border: none;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

/* ===== Toast 알림 스타일 ===== */
.toast {
  border: none;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  min-width: 320px;
  max-width: 400px;
  background-color: #1f2937;
}

.toast-body {
  padding: 16px 20px;
  color: #ffffff;
  font-size: 14px;
  line-height: 1.5;
  font-weight: 500;
}

.toast-body .btn-close {
  filter: invert(1);
  opacity: 0.7;
}

.toast-body .btn-close:hover {
  opacity: 1;
}

.toast-container {
  margin-top: 20px;
}

.toast.showing {
  animation: toastSlideIn 0.25s ease-out;
}

.toast.hide {
  animation: toastSlideOut 0.2s ease-in;
}

@keyframes toastSlideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toastSlideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* ===== 헤더 컴포넌트 (Bootstrap Navbar 기반) ===== */
header {
  min-height: 60px;
}

header .navbar {
  min-height: 60px;
}

header .back-btn,
header .profile-btn {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--bs-border-radius);
  transition: background-color var(--transition-fast);
}

header .back-btn:hover,
header .profile-btn:hover {
  background-color: var(--color-bg-hover);
  text-decoration: none;
}

header .back-btn:focus,
header .profile-btn:focus {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.08);
}

header .back-btn img,
header .profile-btn img {
  transition: transform var(--transition-fast);
}

header .back-btn:hover img,
header .profile-btn:hover img {
  transform: scale(1.1);
}

/* 프로필 이미지 원형 스타일 */
header .profile-btn .profile-image {
  border-radius: 50%;
  width: 40px;
  height: 40px;
  object-fit: cover;
  border: 2px solid #e5e7eb;
}

/* 브랜드 링크 스타일 */
header .navbar-brand:hover {
  color: var(--bs-primary) !important;
  transform: translateY(-1px);
}

/* 프로필 드롭다운 (Bootstrap Dropdown 확장) */
header .profile-dropdown {
  border-radius: var(--bs-border-radius-lg);
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
  min-width: 220px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  margin-top: 0.5rem;
  padding: 8px;
  right: 0;
  left: auto;
  transform: translateX(-8px);
}

header .profile-dropdown .dropdown-item {
  padding: 10px 12px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--bs-border-radius-sm);
  margin: 0;
  margin-bottom: 4px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
}

header .profile-dropdown .dropdown-item i {
  font-size: 1rem;
  width: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

header .profile-dropdown .dropdown-item:hover {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--bs-primary);
  /* transform: translateX(4px); */
}

header .profile-dropdown .dropdown-item:hover i {
  color: var(--bs-primary);
}

header .profile-dropdown .logout-btn {
  color: #6b7280;
}

header .profile-dropdown .logout-btn:hover {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444 !important;
}

header .profile-dropdown .logout-btn:hover i {
  color: #ef4444;
}

header .profile-dropdown .dropdown-divider {
  margin: 8px 0;
  opacity: 0.15;
}

/* ===== 푸터 컴포넌트 (Bootstrap 기반) ===== */
footer {
  margin-top: auto;
  min-height: 200px;
}

footer .hover-primary {
  transition: color var(--transition-fast);
}

footer .hover-primary:hover {
  color: var(--bs-primary) !important;
}

footer h5,
footer h6 {
  color: #374151;
}

footer .list-unstyled li {
  transition: transform var(--transition-fast);
}

footer .list-unstyled li:hover {
  transform: translateX(4px);
}

/* ===== 게시물 카드 ===== */
.post-card {
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent !important;
  /* CLS 방지: 최소 높이 설정 */
  min-height: 180px;
}

.post-card:hover {
  border-color: var(--bs-primary) !important;
  background-color: #f8f9fa !important;
}

.post-card .post-title {
  font-size: var(--post-card-title-size);
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
  color: var(--bs-body-color);
  /* CLS 방지: 최소 높이 설정 */
  min-height: 1.75rem;
}

.post-card .author-image {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  object-fit: cover;
  border: 2px solid #f8f9fa;
  border-radius: 50%;
  background-color: #e5e7eb;
}

.post-card .post-image {
  max-height: 400px;
  object-fit: cover;
  /* CLS 방지: aspect ratio 설정은 post-card.css에서 처리 */
}

.post-card .dropdown button,
.post-card .btn.rounded-circle {
  width: 36px !important;
  height: 36px !important;
  min-width: 36px !important;
  min-height: 36px !important;
  border: 0 !important;
  padding: 0 !important;
  transition: background-color 0.2s;
}

.post-card .dropdown button:hover,
.post-card .btn.rounded-circle:hover {
  background-color: #e9ecef !important;
}

.post-card .dropdown-menu {
  min-width: 160px;
  border-radius: 12px;
  padding: 8px;
  border: 0;
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.post-card .dropdown-item {
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  transition: background-color 0.2s;
}

/* ===== 게시물 상세 페이지 ===== */
.post-detail-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
  animation: fadeIn 0.3s ease-in;
}

.post-title {
  font-size: var(--post-detail-title-size);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.8;
  min-height: 100px;
}

.post-images img {
  border-radius: 8px;
  min-height: 200px;
  background-color: #f8f9fa;
}

#like-btn:hover {
  transform: translateY(-2px);
}

#like-btn:active {
  transform: translateY(0);
}

/* 댓글 섹션 */
#comments-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  background-color: #f8f9fa;
  border-radius: 12px;
}

.comment-card {
  transition: all 0.2s ease;
  background-color: white;
  animation: slideIn 0.3s ease-out;
}

.comment-card:hover {
  background-color: #f8f9fa;
  transform: translateX(4px);
}

#comment-form textarea {
  resize: vertical;
  min-height: 80px;
}

#comment-form button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(13, 110, 253, 0.3);
}

/* 스켈레톤 로더 */
.skeleton-loader {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
  min-height: 600px;
  animation: fadeIn 0.3s ease-in;
}

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 0%, #e8e8e8 20%, #f0f0f0 40%, #f0f0f0 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 6px;
}

.skeleton-title {
  height: 64px;
  width: 75%;
  border-radius: 8px;
}

.skeleton-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-text {
  height: 20px;
  width: 100%;
  border-radius: 4px;
}

.skeleton-image {
  height: 400px;
  width: 100%;
  border-radius: 8px;
}

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

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

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

/* ===== 프로필 이미지 업로드 ===== */
.profile-image-circle {
  width: 120px;
  height: 120px;
  border: 3px dashed var(--bs-border-color);
  transition: border-color 0.2s;
}

.profile-image-wrapper:hover .profile-image-circle {
  border-color: var(--bs-primary);
}

.profile-image-circle.has-image {
  border-style: solid;
}

/* ===== 폼 검증 ===== */
.password-requirements .icon {
  width: 14px;
}

/* ===== 인증 페이지 ===== */
body[data-page="users-signin"],
body[data-page="users-signup"] {
  background-color: #f8f9fa;
}

body[data-page="users-signin"] .border,
body[data-page="users-signup"] .border {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

body[data-page="users-signin"] a:hover,
body[data-page="users-signup"] a:hover {
  color: #2563eb !important;
}

/* ===== 접근성 ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== 반응형 디자인 ===== */
@media (max-width: 768px) {
  header .navbar {
    min-height: 56px;
  }
  
  header .back-btn,
  header .profile-btn {
    width: 36px;
    height: 36px;
  }
  
  header .back-btn img,
  header .profile-btn img {
    width: 20px;
    height: 20px;
  }
  
  header .navbar-brand {
    font-size: 1rem;
  }
  
  header .profile-dropdown {
    min-width: 180px;
  }
  
  .post-detail-content {
    padding: 1rem;
  }
  
  .post-title {
    font-size: 1.5rem;
  }
  
  .post-content {
    font-size: 1rem;
  }
  
  #like-btn {
    width: 100%;
  }
  
  #comments-section {
    padding: 1rem;
  }
  
  .skeleton-title {
    height: 48px;
    width: 90%;
  }
  
  .skeleton-image {
    height: 250px;
  }
}