/* =============================================
   렌즈클럽 - 사진 동아리 홈페이지 메인 CSS
   Dark Elegant Theme
   ============================================= */

/* ── 변수 ── */
:root {
  --bg-primary:   #0d0d0d;
  --bg-secondary: #141414;
  --bg-card:      #1a1a1a;
  --bg-hover:     #222222;
  --accent:       #c9a84c;
  --accent-light: #e0c070;
  --accent-dark:  #a07830;
  --text-primary: #f0f0f0;
  --text-secondary:#aaaaaa;
  --text-muted:   #666666;
  --border:       #2a2a2a;
  --border-light: #333333;
  --shadow:       0 4px 24px rgba(0,0,0,0.5);
  --shadow-lg:    0 8px 48px rgba(0,0,0,0.7);
  --radius:       8px;
  --radius-lg:    16px;
  --transition:   0.3s ease;
  --font-body:    'Noto Sans KR', sans-serif;
  --font-display: 'Playfair Display', serif;
  --nav-height:   70px;
}

/* ── 리셋 & 기본 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-light); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; font-family: var(--font-body); }

/* ── 스크롤바 ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent-dark); border-radius: 3px; }

/* =============================================
   네비게이션
   ============================================= */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background var(--transition);
}
.navbar.scrolled { background: rgba(13,13,13,0.98); }
.nav-container {
  max-width: 1280px; margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.3rem; font-weight: 700;
  color: var(--text-primary);
}
.nav-logo i { color: var(--accent); font-size: 1.5rem; }
.nav-menu {
  display: flex; align-items: center; gap: 4px;
}
.nav-link {
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 500;
  transition: all var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: var(--bg-hover);
}
.nav-btn {
  background: var(--accent);
  color: var(--bg-primary) !important;
  padding: 8px 18px;
  border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 700;
  transition: all var(--transition);
}
.nav-btn:hover { background: var(--accent-light); }
.nav-btn-outline {
  background: transparent !important;
  color: var(--accent) !important;
  border: 1px solid var(--accent);
}
.nav-btn-outline:hover { background: var(--accent) !important; color: var(--bg-primary) !important; }
.nav-admin { color: var(--accent) !important; }
.nav-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  background: none; border: none; padding: 8px;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--text-primary);
  transition: all var(--transition);
}

/* =============================================
   메인 콘텐츠 영역
   ============================================= */
.main-content { padding-top: var(--nav-height); min-height: calc(100vh - var(--nav-height)); }

/* ── 히어로 섹션 ── */
.hero {
  position: relative;
  height: calc(100vh - var(--nav-height));
  min-height: 600px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  background: var(--bg-secondary);
}
.hero-bg {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, #0d0d0d 0%, #1a1208 50%, #0d0d0d 100%);
}
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(201,168,76,0.08) 0%, transparent 70%);
}
.hero-content {
  position: relative; z-index: 1;
  text-align: center; padding: 0 24px;
}
.hero-eyebrow {
  font-size: 0.85rem; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 20px;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 700; line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.hero-title em { font-style: italic; color: var(--accent); }
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary); margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius);
  font-size: 0.95rem; font-weight: 600;
  transition: all var(--transition); border: none;
}
.btn-primary { background: var(--accent); color: var(--bg-primary); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,168,76,0.3); color: var(--bg-primary); }
.btn-outline { background: transparent; color: var(--text-primary); border: 1px solid var(--border-light); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.hero-scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  color: var(--text-muted); font-size: 0.8rem; letter-spacing: 0.2em;
  text-transform: uppercase; display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: bounce 2s infinite;
}
.hero-scroll i { font-size: 1.2rem; }
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(8px)} }

/* ── 섹션 공통 ── */
.section { padding: 80px 24px; }
.section-alt { background: var(--bg-secondary); }
.container { max-width: 1280px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-label {
  font-size: 0.8rem; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700; color: var(--text-primary);
  margin-bottom: 16px;
}
.section-desc { color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* ── 통계 카드 ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px; margin-top: 48px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px; text-align: center;
  transition: all var(--transition);
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: var(--shadow); }
.stat-number {
  font-family: var(--font-display);
  font-size: 2.8rem; font-weight: 700;
  color: var(--accent); line-height: 1;
  margin-bottom: 8px;
}
.stat-label { color: var(--text-secondary); font-size: 0.9rem; }

/* ── 갤러리 그리드 ── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.gallery-grid.masonry {
  columns: 3; column-gap: 16px;
}
.gallery-grid.masonry .gallery-item { break-inside: avoid; margin-bottom: 16px; }
.gallery-item {
  position: relative; overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  cursor: pointer;
  transition: transform var(--transition);
}
.gallery-item:hover { transform: scale(1.02); }
.gallery-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
  opacity: 0; transition: opacity var(--transition);
  display: flex; align-items: flex-end; padding: 20px;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-info h3 { font-size: 1rem; color: var(--text-primary); margin-bottom: 4px; }
.gallery-info p { font-size: 0.8rem; color: var(--text-secondary); }
.gallery-like {
  position: absolute; top: 12px; right: 12px;
  background: rgba(0,0,0,0.6); color: var(--text-primary);
  border: none; border-radius: 20px; padding: 6px 12px;
  font-size: 0.8rem; display: flex; align-items: center; gap: 4px;
  transition: all var(--transition);
}
.gallery-like:hover, .gallery-like.liked { color: #e74c3c; }

/* ── 카드 공통 ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.card:hover { border-color: var(--border-light); box-shadow: var(--shadow); transform: translateY(-4px); }
.card-body { padding: 24px; }
.card-title { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.card-text { color: var(--text-secondary); font-size: 0.9rem; }
.card-meta { color: var(--text-muted); font-size: 0.8rem; margin-top: 12px; }

/* ── 부원 카드 ── */
.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.member-card { text-align: center; }
.member-avatar {
  width: 100px; height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--border);
  transition: border-color var(--transition);
}
.member-card:hover .member-avatar { border-color: var(--accent); }
.member-name { font-weight: 700; font-size: 1rem; color: var(--text-primary); }
.member-role { color: var(--accent); font-size: 0.85rem; margin: 4px 0; }
.member-dept { color: var(--text-muted); font-size: 0.8rem; }

/* ── 게시판 테이블 ── */
.board-table { width: 100%; border-collapse: collapse; }
.board-table th, .board-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.board-table th {
  font-size: 0.85rem; color: var(--text-muted);
  font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em;
  background: var(--bg-secondary);
}
.board-table tr:hover td { background: var(--bg-hover); }
.board-table td a { color: var(--text-primary); }
.board-table td a:hover { color: var(--accent); }
.badge {
  display: inline-block; padding: 2px 8px;
  border-radius: 4px; font-size: 0.75rem; font-weight: 600;
}
.badge-pinned { background: rgba(201,168,76,0.15); color: var(--accent); }
.badge-new { background: rgba(46,213,115,0.15); color: #2ed573; }

/* ── 폼 ── */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 8px; font-weight: 500; }
.form-control {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: border-color var(--transition);
}
.form-control:focus { outline: none; border-color: var(--accent); }
.form-control::placeholder { color: var(--text-muted); }
textarea.form-control { resize: vertical; min-height: 120px; }
select.form-control { appearance: none; cursor: pointer; }

/* ── 알림 메시지 ── */
.alert {
  padding: 14px 20px; border-radius: var(--radius);
  margin-bottom: 20px; font-size: 0.9rem;
  border-left: 4px solid;
}
.alert-success { background: rgba(46,213,115,0.1); border-color: #2ed573; color: #2ed573; }
.alert-error   { background: rgba(231,76,60,0.1);  border-color: #e74c3c; color: #e74c3c; }
.alert-info    { background: rgba(201,168,76,0.1); border-color: var(--accent); color: var(--accent); }

/* ── 페이지네이션 ── */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 40px; }
.page-btn {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 0.9rem;
  background: var(--bg-card);
  transition: all var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: var(--accent); border-color: var(--accent);
  color: var(--bg-primary);
}

/* ── 라이트박스 ── */
.lightbox {
  display: none; position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.95);
  align-items: center; justify-content: center;
}
.lightbox.open { display: flex; }
.lightbox-img { max-width: 90vw; max-height: 85vh; object-fit: contain; border-radius: var(--radius); }
.lightbox-close {
  position: absolute; top: 20px; right: 24px;
  font-size: 2rem; color: var(--text-secondary);
  background: none; border: none;
  transition: color var(--transition);
}
.lightbox-close:hover { color: var(--text-primary); }
.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  font-size: 2rem; color: var(--text-secondary);
  background: rgba(0,0,0,0.5); border: none;
  padding: 12px 16px; border-radius: var(--radius);
  transition: all var(--transition);
}
.lightbox-nav:hover { color: var(--text-primary); background: rgba(0,0,0,0.8); }
.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }

/* ── 페이지 헤더 ── */
.page-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 48px 24px;
  text-align: center;
}
.page-header-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--text-primary); margin-bottom: 8px;
}
.page-header-sub { color: var(--text-secondary); font-size: 0.95rem; }
.breadcrumb {
  display: flex; gap: 8px; justify-content: center;
  font-size: 0.85rem; color: var(--text-muted);
  margin-bottom: 12px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--border-light); }

/* ── 푸터 ── */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 60px 24px 0;
}
.footer-container {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 2fr;
  gap: 48px; padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}
.footer-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.2rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 12px;
}
.footer-logo i { color: var(--accent); }
.footer-tagline { color: var(--text-muted); font-size: 0.9rem; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col h4 { color: var(--text-primary); font-size: 0.9rem; margin-bottom: 16px; font-weight: 600; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: var(--text-muted); font-size: 0.9rem; }
.footer-col ul li a:hover { color: var(--accent); }
.footer-social { display: flex; gap: 16px; }
.footer-social a { color: var(--text-muted); font-size: 1.3rem; transition: color var(--transition); }
.footer-social a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1280px; margin: 0 auto;
  padding: 20px 0; text-align: center;
  color: var(--text-muted); font-size: 0.85rem;
}

/* ── 관리자 패널 ── */
.admin-layout { display: grid; grid-template-columns: 240px 1fr; min-height: calc(100vh - var(--nav-height)); }
.admin-sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 24px 0;
}
.admin-sidebar-title { padding: 0 20px 16px; font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); }
.admin-nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 20px; color: var(--text-secondary);
  font-size: 0.9rem; transition: all var(--transition);
}
.admin-nav-link:hover, .admin-nav-link.active {
  color: var(--text-primary); background: var(--bg-hover);
  border-right: 2px solid var(--accent);
}
.admin-nav-link i { width: 18px; text-align: center; }
.admin-main { padding: 32px; }

/* ── 업로드 영역 ── */
.upload-zone {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px; text-align: center;
  cursor: pointer; transition: all var(--transition);
  color: var(--text-muted);
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(201,168,76,0.05);
  color: var(--accent);
}
.upload-zone i { font-size: 3rem; margin-bottom: 16px; }
.upload-zone p { font-size: 0.95rem; }

/* ── 필터 탭 ── */
.filter-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 32px; }
.filter-tab {
  padding: 8px 20px; border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent; color: var(--text-secondary);
  font-size: 0.9rem; cursor: pointer;
  transition: all var(--transition);
}
.filter-tab:hover, .filter-tab.active {
  background: var(--accent); border-color: var(--accent);
  color: var(--bg-primary); font-weight: 600;
}

/* =============================================
   반응형
   ============================================= */
@media (max-width: 1024px) {
  .footer-container { grid-template-columns: 1fr; }
  .gallery-grid.masonry { columns: 2; }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed; top: var(--nav-height); left: 0; right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: stretch;
    padding: 16px;
    transform: translateY(-100%); opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
    gap: 4px;
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav-toggle { display: flex; }
  .section { padding: 56px 16px; }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .gallery-grid.masonry { columns: 2; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-sidebar { display: none; }
  .footer-links { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .gallery-grid.masonry { columns: 1; }
  .members-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}