/* ===================================
   DECASAGE - Clean & Modern Design
   =================================== */

:root {
  /* Primary Colors */
  --primary-green: #2D5A27;
  --primary-green-light: #4A7C43;
  --primary-green-dark: #1E3D1A;
  
  /* Category Colors */
  --digital-color: #1976D2;
  --ecology-color: #2D5A27;
  --culture-color: #9C27B0;
  --academy-color: #B8860B;
  
  /* Accent */
  --accent-lime: #C4D600;
  
  /* Neutral */
  --white: #FFFFFF;
  --light-gray: #F5F5F5;
  --mid-gray: #E0E0E0;
  --text-dark: #1A1A1A;
  --text-medium: #4A4A4A;
  --text-light: #717171;
  
  /* Typography */
  --font-primary: 'Noto Sans KR', -apple-system, sans-serif;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  
  /* Layout */
  --max-width: 1200px;
  --nav-height: 70px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ===================================
   Navigation
   =================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.98);
  border-bottom: 1px solid var(--mid-gray);
  height: var(--nav-height);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
}

.logo-deca { color: var(--primary-green); }
.logo-sage {
  color: var(--accent-lime);
  background: var(--primary-green);
  padding: 2px 6px;
  border-radius: 4px;
}

.nav-menu {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-menu a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-medium);
  transition: color var(--transition-fast);
}

.nav-menu a:hover { color: var(--primary-green); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  transition: all var(--transition-fast);
}

/* Scroll Progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--primary-green);
  z-index: 1001;
  width: 0;
}

/* ===================================
   Hero + Resources Combined Section
   =================================== */
.hero-resources {
  padding-top: var(--nav-height);
}

.hero-banner {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
  padding: var(--space-2xl) 0;
  color: var(--white);
  overflow: hidden;
}

.hero-banner-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-banner-content {
  text-align: left;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255,255,255,0.15);
  border-radius: 50px;
  font-size: 0.8rem;
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xs);
}

.title-deca { color: var(--white); }
.title-sage { color: var(--accent-lime); }

.hero-subtitle {
  font-size: 1rem;
  opacity: 0.8;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.hero-tagline {
  font-size: 1.1rem;
  opacity: 0.9;
}

.hero-tagline strong { color: var(--accent-lime); }

/* Hero Photo Mosaic */
.hero-mosaic {
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.photo-mosaic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 70px);
  gap: 8px;
  max-width: 450px;
  transform: rotateY(-5deg) rotateX(2deg);
  transform-style: preserve-3d;
}

.photo-tile {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.photo-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.photo-tile:hover {
  transform: translateZ(20px) scale(1.05);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
  z-index: 10;
}

.photo-tile:hover img {
  transform: scale(1.1);
}

.photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.8) 100%);
  display: flex;
  align-items: flex-end;
  padding: 10px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.photo-tile:hover .photo-overlay {
  opacity: 1;
}

.photo-label {
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
  white-space: nowrap;
}

/* Photo Tile Sizes */
.photo-large {
  grid-column: span 2;
  grid-row: span 2;
}

.photo-medium {
  grid-column: span 2;
  grid-row: span 1;
}

.photo-small {
  grid-column: span 1;
  grid-row: span 1;
}

.photo-wide {
  grid-column: span 4;
  grid-row: span 1;
}

/* Staggered animation on load */
.photo-tile:nth-child(1) { animation: fadeInUp 0.6s ease 0.1s both; }
.photo-tile:nth-child(2) { animation: fadeInUp 0.6s ease 0.2s both; }
.photo-tile:nth-child(3) { animation: fadeInUp 0.6s ease 0.3s both; }
.photo-tile:nth-child(4) { animation: fadeInUp 0.6s ease 0.4s both; }
.photo-tile:nth-child(5) { animation: fadeInUp 0.6s ease 0.5s both; }
.photo-tile:nth-child(6) { animation: fadeInUp 0.6s ease 0.6s both; }
.photo-tile:nth-child(7) { animation: fadeInUp 0.6s ease 0.7s both; }
.photo-tile:nth-child(8) { animation: fadeInUp 0.6s ease 0.8s both; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px) rotateY(-5deg) rotateX(2deg);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotateY(-5deg) rotateX(2deg);
  }
}

/* Resources Section */
.resources-section {
  padding: var(--space-2xl) 0;
  background: var(--light-gray);
}

.resources-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.section-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-green);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-dark);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--primary-green);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-green-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--white);
  color: var(--text-dark);
  border: 1px solid var(--mid-gray);
}

.btn-secondary:hover {
  border-color: var(--primary-green);
  color: var(--primary-green);
}

.btn-full { width: 100%; justify-content: center; }

/* Category Grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.category-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--white);
  padding: var(--space-lg);
  border-radius: 12px;
  transition: all var(--transition-base);
  border-left: 4px solid transparent;
}

.category-card.digital { border-left-color: var(--digital-color); }
.category-card.ecology { border-left-color: var(--ecology-color); }
.category-card.culture { border-left-color: var(--culture-color); }
.category-card.academy { border-left-color: var(--academy-color); }

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-card.digital:hover { background: var(--digital-color); color: white; }
.category-card.ecology:hover { background: var(--ecology-color); color: white; }
.category-card.culture:hover { background: var(--culture-color); color: white; }
.category-card.academy:hover { background: var(--academy-color); color: white; }

.category-card:hover .category-icon { 
  background: rgba(255,255,255,0.2); 
  color: white;
}

.category-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light-gray);
  border-radius: 12px;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.category-card.digital .category-icon { color: var(--digital-color); }
.category-card.ecology .category-icon { color: var(--ecology-color); }
.category-card.culture .category-icon { color: var(--culture-color); }
.category-card.academy .category-icon { color: var(--academy-color); }

.category-info h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.category-info p {
  font-size: 0.85rem;
  opacity: 0.7;
  margin-bottom: 4px;
}

.category-count {
  font-size: 0.75rem;
  font-weight: 600;
  opacity: 0.6;
}

/* Resources List */
.resources-list-section {
  background: var(--white);
  border-radius: 16px;
  padding: var(--space-xl);
}

.resources-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.resources-list-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--light-gray);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--primary-green);
  color: var(--white);
}

/* Resource Items */
.resources-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.resource-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--light-gray);
  border-radius: 12px;
  transition: all var(--transition-base);
}

.resource-item:hover {
  background: var(--primary-green);
  color: white;
  transform: translateX(8px);
}

.resource-item:hover .resource-category,
.resource-item:hover .resource-meta {
  color: rgba(255,255,255,0.8);
}

.resource-category {
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  flex-shrink: 0;
}

.resource-category.digital { background: #E3F2FD; color: var(--digital-color); }
.resource-category.ecology { background: #E8F5E9; color: var(--ecology-color); }
.resource-category.culture { background: #F3E5F5; color: var(--culture-color); }
.resource-category.academy { background: #FFF8E1; color: var(--academy-color); }

.resource-item:hover .resource-category {
  background: rgba(255,255,255,0.2);
  color: white;
}

.resource-content {
  flex: 1;
  min-width: 0;
}

.resource-content h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.resource-content p {
  font-size: 0.8rem;
  opacity: 0.7;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.resource-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.75rem;
  color: var(--text-light);
  flex-shrink: 0;
}

.resource-views {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-light);
}

.empty-state svg {
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state p {
  margin-bottom: var(--space-lg);
}

/* ===================================
   Modal
   =================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--space-lg);
}

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

.modal {
  background: var(--white);
  border-radius: 16px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--mid-gray);
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light-gray);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--primary-green);
  color: white;
}

.modal-form {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 2px solid var(--mid-gray);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: var(--font-primary);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-green);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
  margin-top: var(--space-sm);
}

/* ===================================
   About Section
   =================================== */
.section {
  padding: var(--space-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.about {
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.about-lead {
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.about-lead strong {
  color: var(--primary-green);
}

.about-text {
  color: var(--text-medium);
  margin-bottom: var(--space-sm);
}

.profile-card-mini {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--light-gray);
  padding: var(--space-lg);
  border-radius: 12px;
  margin-bottom: var(--space-md);
}

.avatar-mini {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
}

.profile-info-mini h3 {
  font-size: 1.1rem;
  margin-bottom: 2px;
}

.profile-info-mini p {
  font-size: 0.85rem;
  color: var(--text-light);
}

.philosophy-card-mini {
  background: var(--primary-green);
  color: white;
  padding: var(--space-lg);
  border-radius: 12px;
}

.philosophy-card-mini h4 {
  font-size: 1rem;
  margin-bottom: var(--space-xs);
}

.philosophy-card-mini p {
  font-size: 0.9rem;
  margin-bottom: var(--space-xs);
}

.philosophy-card-mini p strong {
  color: var(--accent-lime);
}

.philosophy-card-mini span {
  font-size: 0.8rem;
  opacity: 0.8;
}

/* ===================================
   Research Section
   =================================== */
.research {
  background: var(--light-gray);
}

.deca-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.deca-card {
  background: var(--white);
  padding: var(--space-lg);
  border-radius: 12px;
  text-align: center;
  transition: all var(--transition-base);
}

.deca-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.deca-letter {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 auto var(--space-md);
}

.deca-d .deca-letter { background: #E3F2FD; color: var(--digital-color); }
.deca-e .deca-letter { background: #E8F5E9; color: var(--ecology-color); }
.deca-c .deca-letter { background: #F3E5F5; color: var(--culture-color); }
.deca-a .deca-letter { background: #FFF8E1; color: var(--academy-color); }

.deca-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-xs);
}

.deca-card p {
  font-size: 0.85rem;
  color: var(--text-medium);
}

/* ===================================
   Contact Section
   =================================== */
.contact {
  background: var(--white);
}

.contact-simple {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.contact-info-box h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.contact-info-box > p {
  color: var(--text-medium);
  margin-bottom: var(--space-lg);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-medium);
}

.contact-detail svg {
  color: var(--primary-green);
}

.contact-form-simple {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.contact-form-simple input,
.contact-form-simple textarea {
  padding: 14px 18px;
  border: 2px solid var(--mid-gray);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: var(--font-primary);
  transition: border-color var(--transition-fast);
}

.contact-form-simple input:focus,
.contact-form-simple textarea:focus {
  outline: none;
  border-color: var(--primary-green);
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--primary-green-dark);
  color: white;
  padding: var(--space-xl) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,0.15);
  margin-bottom: var(--space-md);
}

.footer-logo { font-size: 1.25rem; font-weight: 700; }
.footer-brand p { font-size: 0.85rem; opacity: 0.7; margin-top: 4px; }

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  font-size: 0.9rem;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-links a:hover { opacity: 1; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  opacity: 0.6;
}

.footer-quote {
  color: var(--accent-lime) !important;
  opacity: 1 !important;
}

/* ===================================
   Resource Detail Page
   =================================== */
.resource-detail {
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-2xl);
  min-height: 100vh;
  background: var(--light-gray);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-medium);
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--primary-green);
}

.resource-article {
  background: var(--white);
  border-radius: 16px;
  padding: var(--space-2xl);
}

.resource-category-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.resource-category-badge.digital { background: #E3F2FD; color: var(--digital-color); }
.resource-category-badge.ecology { background: #E8F5E9; color: var(--ecology-color); }
.resource-category-badge.culture { background: #F3E5F5; color: var(--culture-color); }
.resource-category-badge.academy { background: #FFF8E1; color: var(--academy-color); }

.resource-article h1 {
  font-size: 1.75rem;
  margin-bottom: var(--space-md);
}

.resource-detail-meta {
  display: flex;
  gap: var(--space-lg);
  font-size: 0.85rem;
  color: var(--text-light);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--mid-gray);
  margin-bottom: var(--space-lg);
}

.resource-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-medium);
}

.resource-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-lg);
  padding: 12px 24px;
  background: var(--primary-green);
  color: white;
  border-radius: 8px;
  font-weight: 500;
  transition: all var(--transition-base);
}

.resource-link-btn:hover {
  background: var(--primary-green-dark);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
  .hero-banner-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-xl);
  }
  
  .hero-banner-content {
    text-align: center;
  }
  
  .photo-mosaic-grid {
    max-width: 380px;
    transform: none;
    grid-template-rows: repeat(4, 60px);
  }
  
  .photo-tile:hover {
    transform: scale(1.05);
  }
  
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .deca-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-simple {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero-mosaic {
    display: none;
  }
  
  .hero-banner-inner {
    grid-template-columns: 1fr;
    padding: var(--space-lg);
  }
  
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-sm);
    border-bottom: 1px solid var(--mid-gray);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-toggle { display: flex; }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  .hero-title { font-size: 2.5rem; }
  
  .resources-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .category-grid {
    grid-template-columns: 1fr;
  }
  
  .category-card {
    flex-direction: row;
  }
  
  .filter-tabs {
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 8px;
  }
  
  .resource-item {
    flex-wrap: wrap;
  }
  
  .resource-meta {
    width: 100%;
    justify-content: flex-end;
    margin-top: var(--space-xs);
  }
  
  .deca-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .deca-grid {
    grid-template-columns: 1fr;
  }
  
  .resource-detail-meta {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

/* ===================================
   Admin System Styles
   =================================== */

/* Admin Panel (Floating) */
.admin-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1500;
  background: var(--primary-green);
  color: white;
  border-radius: 16px;
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { transform: translateY(100px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.admin-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  font-size: 0.85rem;
  font-weight: 600;
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid rgba(255,255,255,0.2);
}

.admin-logout-btn {
  background: rgba(255,255,255,0.1);
  border: none;
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.admin-logout-btn:hover {
  background: rgba(255,255,255,0.2);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
}

/* Admin Login Button State */
#adminLoginBtn.active {
  background: var(--primary-green-dark);
}

/* Resource Item with Delete Button */
.resource-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--light-gray);
  border-radius: 12px;
  transition: all var(--transition-base);
  position: relative;
}

.resource-item-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
  min-width: 0;
}

.resource-item:hover {
  background: var(--primary-green);
  color: white;
  transform: translateX(8px);
}

.resource-item:hover .resource-category,
.resource-item:hover .resource-meta {
  color: rgba(255,255,255,0.8);
}

.resource-item:hover .resource-category {
  background: rgba(255,255,255,0.2);
  color: white;
}

/* Delete Button */
.delete-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #C53030;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition-fast);
  z-index: 10;
}

.resource-item:hover .delete-btn {
  opacity: 1;
}

.delete-btn:hover {
  background: #9B2C2C;
  transform: translateY(-50%) scale(1.1);
}

/* Modal Sizes */
.modal-sm {
  max-width: 400px;
}

/* Modal Body */
.modal-body {
  padding: var(--space-lg);
  text-align: center;
}

.modal-body p {
  margin-bottom: var(--space-sm);
}

.delete-title {
  font-weight: 700;
  color: var(--primary-green);
  font-size: 1.1rem;
}

/* Form Hint */
.form-hint {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: var(--space-xs);
}

.form-hint.warning {
  color: #C53030;
}

/* File Upload Area */
.file-upload-area {
  border: 2px dashed var(--mid-gray);
  border-radius: 12px;
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition-base);
  cursor: pointer;
  background: var(--light-gray);
}

.file-upload-area:hover,
.file-upload-area.drag-over {
  border-color: var(--primary-green);
  background: rgba(45, 90, 39, 0.05);
}

.file-upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-light);
}

.file-upload-placeholder svg {
  color: var(--text-light);
}

.file-upload-placeholder p {
  font-size: 0.95rem;
  margin: 0;
}

.file-hint {
  font-size: 0.8rem;
  color: var(--text-light);
}

.file-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: white;
  border-radius: 8px;
}

.file-name {
  font-weight: 500;
  color: var(--text-dark);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-size {
  font-size: 0.85rem;
  color: var(--text-light);
}

.file-remove {
  background: #C53030;
  color: white;
  border: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.file-remove:hover {
  background: #9B2C2C;
  transform: scale(1.1);
}

/* File attachment display in resource detail */
.resource-files {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--mid-gray);
}

.resource-files h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--space-md);
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.file-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--light-gray);
  border-radius: 8px;
  transition: all var(--transition-base);
}

.file-item:hover {
  background: rgba(45, 90, 39, 0.1);
}

.file-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-green);
  color: white;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.file-info {
  flex: 1;
}

.file-info-name {
  font-weight: 500;
  color: var(--text-dark);
}

.file-info-meta {
  font-size: 0.8rem;
  color: var(--text-light);
}

.file-download-btn {
  padding: 8px 16px;
  background: var(--primary-green);
  color: white;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-base);
}

.file-download-btn:hover {
  background: var(--primary-green-dark);
}

/* Danger Button */
.btn-danger {
  background: #C53030;
  color: white;
}

.btn-danger:hover {
  background: #9B2C2C;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Empty State Hint */
.empty-state-hint {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: var(--space-xs);
}

/* Admin Mode Indicator in Resource Items */
.resource-item[data-id] {
  padding-right: 60px;
}

/* ===================================
   News Section Styles
   =================================== */
.news-section {
  padding: var(--space-2xl) 0;
  background: var(--white);
}

.news-category-grid {
  margin-bottom: var(--space-xl);
}

.category-card.news-card {
  border-left-color: var(--primary-green);
}

.category-card.news-card.notice { border-left-color: #E53935; }
.category-card.news-card.lecture { border-left-color: #1976D2; }
.category-card.news-card.training { border-left-color: #2D5A27; }
.category-card.news-card.event { border-left-color: #9C27B0; }

.category-card.news-card.notice:hover { background: #E53935; color: white; }
.category-card.news-card.lecture:hover { background: #1976D2; color: white; }
.category-card.news-card.training:hover { background: #2D5A27; color: white; }
.category-card.news-card.event:hover { background: #9C27B0; color: white; }

.category-emoji {
  font-size: 2rem;
}

.resource-category.news-badge.notice { background: #FFEBEE; color: #E53935; }
.resource-category.news-badge.lecture { background: #E3F2FD; color: #1976D2; }
.resource-category.news-badge.training { background: #E8F5E9; color: #2D5A27; }
.resource-category.news-badge.event { background: #F3E5F5; color: #9C27B0; }

.resource-category-badge.news-badge.notice { background: #FFEBEE; color: #E53935; }
.resource-category-badge.news-badge.lecture { background: #E3F2FD; color: #1976D2; }
.resource-category-badge.news-badge.training { background: #E8F5E9; color: #2D5A27; }
.resource-category-badge.news-badge.event { background: #F3E5F5; color: #9C27B0; }

.news-item:hover .resource-category.news-badge {
  background: rgba(255,255,255,0.2);
  color: white;
}

.news-filter-tabs .filter-tab {
  font-size: 0.75rem;
}

/* ===================================
   Password Protected Posts
   =================================== */
.resource-item.protected {
  background: linear-gradient(135deg, var(--light-gray) 0%, #fff8e1 100%);
  border: 1px dashed #B8860B;
}

.resource-item.protected:hover {
  background: linear-gradient(135deg, var(--primary-green) 0%, #B8860B 100%);
}

.lock-icon {
  margin-right: 4px;
}

/* Password Required Box */
.password-required-box {
  background: var(--white);
  border-radius: 16px;
  padding: var(--space-2xl);
  text-align: center;
  max-width: 500px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.lock-icon-large {
  font-size: 4rem;
  margin-bottom: var(--space-md);
}

.password-required-box h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--text-dark);
}

.password-required-box p {
  color: var(--text-medium);
  margin-bottom: var(--space-lg);
}

.password-form {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

.password-form input {
  padding: 12px 18px;
  border: 2px solid var(--mid-gray);
  border-radius: 10px;
  font-size: 1rem;
  width: 200px;
  font-family: var(--font-primary);
}

.password-form input:focus {
  outline: none;
  border-color: var(--primary-green);
}

/* ===================================
   Upload Form Additional Styles
   =================================== */
.board-type-selector {
  display: flex;
  gap: var(--space-sm);
}

.board-type-option {
  flex: 1;
  cursor: pointer;
}

.board-type-option input {
  display: none;
}

.board-type-label {
  display: block;
  padding: 14px;
  background: var(--light-gray);
  border-radius: 10px;
  text-align: center;
  font-weight: 600;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.board-type-option input:checked + .board-type-label {
  background: var(--primary-green);
  color: white;
  border-color: var(--primary-green-dark);
}

.board-type-label:hover {
  background: var(--mid-gray);
}

.board-type-option input:checked + .board-type-label:hover {
  background: var(--primary-green-dark);
}

.privacy-options {
  display: flex;
  gap: var(--space-sm);
}

.privacy-option {
  flex: 1;
  cursor: pointer;
}

.privacy-option input {
  display: none;
}

.privacy-label {
  display: block;
  padding: 12px;
  background: var(--light-gray);
  border-radius: 8px;
  text-align: center;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.privacy-option input:checked + .privacy-label {
  background: var(--primary-green);
  color: white;
}

.privacy-label:hover {
  background: var(--mid-gray);
}

.privacy-option input:checked + .privacy-label:hover {
  background: var(--primary-green-dark);
}

/* Total Count */
.total-count {
  font-weight: 400;
  color: var(--text-light);
  font-size: 0.9em;
}

/* Responsive Admin Panel */
@media (max-width: 768px) {
  .admin-panel {
    bottom: 16px;
    right: 16px;
    left: 16px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  
  .admin-panel-header {
    border-bottom: none;
    padding-bottom: 0;
  }
  
  .delete-btn {
    opacity: 1;
    position: relative;
    right: auto;
    top: auto;
    transform: none;
    flex-shrink: 0;
  }
  
  .resource-item-link {
    flex-wrap: wrap;
  }
}

/* ===================================
   Admin Messages Page Styles
   =================================== */

/* Back to Home Link */
.back-to-home {
  font-size: 0.9rem;
  color: var(--text-medium);
  padding: 8px 16px;
  background: var(--light-gray);
  border-radius: 8px;
  transition: all var(--transition-fast);
}

.back-to-home:hover {
  background: var(--primary-green);
  color: white;
}

/* Admin Messages Page */
.admin-messages-page {
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-2xl);
  min-height: 100vh;
  background: var(--light-gray);
}

.admin-messages-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.admin-messages-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.admin-messages-header p {
  color: var(--text-medium);
}

/* Admin Login Required Notice */
.admin-login-required {
  display: flex;
  justify-content: center;
  padding: var(--space-2xl);
}

.login-notice-box {
  background: white;
  border-radius: 16px;
  padding: var(--space-2xl);
  text-align: center;
  max-width: 400px;
  box-shadow: var(--shadow-md);
}

.login-notice-box svg {
  color: var(--primary-green);
  margin-bottom: var(--space-md);
}

.login-notice-box h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.login-notice-box p {
  color: var(--text-medium);
  margin-bottom: var(--space-lg);
}

.inline-login-form {
  display: flex;
  gap: var(--space-sm);
}

.inline-login-form input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid var(--mid-gray);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: var(--font-primary);
  transition: border-color var(--transition-fast);
}

.inline-login-form input:focus {
  outline: none;
  border-color: var(--primary-green);
}

/* Messages Container */
.messages-container {
  background: white;
  border-radius: 16px;
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.messages-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--mid-gray);
}

.unread-badge {
  background: #C53030;
  color: white;
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Messages List */
.messages-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.message-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--light-gray);
  border-radius: 12px;
  transition: all var(--transition-base);
}

.message-item.unread {
  background: #E8F5E9;
  border-left: 4px solid var(--primary-green);
}

.message-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.message-status {
  width: 12px;
  flex-shrink: 0;
}

.unread-dot {
  display: block;
  width: 10px;
  height: 10px;
  background: var(--primary-green);
  border-radius: 50%;
}

.message-content {
  flex: 1;
  min-width: 0;
  cursor: pointer;
}

.message-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.message-sender {
  font-weight: 600;
  font-size: 0.95rem;
}

.message-date {
  font-size: 0.75rem;
  color: var(--text-light);
}

.message-subject {
  font-weight: 500;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.message-preview {
  font-size: 0.85rem;
  color: var(--text-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.message-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.action-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 1px solid var(--mid-gray);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-medium);
}

.action-btn:hover {
  border-color: var(--primary-green);
  color: var(--primary-green);
}

.action-btn.delete-btn:hover {
  border-color: #C53030;
  color: #C53030;
  background: #FFF5F5;
}

/* Loading and Empty States */
.loading-state,
.error-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-light);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--mid-gray);
  border-top-color: var(--primary-green);
  border-radius: 50%;
  margin: 0 auto var(--space-md);
  animation: spin 0.8s linear infinite;
}

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

/* Message Detail Modal */
.modal-lg {
  max-width: 600px;
}

.message-detail-content {
  padding: var(--space-lg);
}

.message-detail-meta {
  background: var(--light-gray);
  padding: var(--space-md);
  border-radius: 10px;
  margin-bottom: var(--space-lg);
}

.message-detail-meta p {
  margin-bottom: var(--space-xs);
  font-size: 0.9rem;
}

.message-detail-meta p:last-child {
  margin-bottom: 0;
}

.message-detail-meta a {
  color: var(--digital-color);
}

.message-detail-meta a:hover {
  text-decoration: underline;
}

.message-detail-body {
  white-space: pre-wrap;
  line-height: 1.8;
  color: var(--text-medium);
  padding: var(--space-md);
  background: var(--light-gray);
  border-radius: 10px;
  min-height: 100px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-lg);
  border-top: 1px solid var(--mid-gray);
}

/* Admin Panel Message Link */
.admin-panel-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.admin-panel-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  font-size: 0.8rem;
  color: white;
  transition: background var(--transition-fast);
}

.admin-panel-link:hover {
  background: rgba(255,255,255,0.2);
}

.message-count-badge {
  background: #C53030;
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 50px;
  margin-left: auto;
}

/* Responsive Messages Page */
@media (max-width: 768px) {
  .admin-messages-header h1 {
    font-size: 1.5rem;
  }
  
  .inline-login-form {
    flex-direction: column;
  }
  
  .messages-toolbar {
    flex-direction: column;
    gap: var(--space-sm);
    align-items: stretch;
  }
  
  .message-item {
    flex-direction: column;
    align-items: stretch;
  }
  
  .message-status {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
  }
  
  .message-item {
    position: relative;
    padding-left: calc(var(--space-md) + 20px);
  }
  
  .message-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  
  .message-actions {
    margin-top: var(--space-sm);
    justify-content: flex-end;
  }
  
  .modal-footer {
    flex-direction: column;
  }
  
  .modal-footer .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Reply Modal Styles */
.reply-info {
  background: var(--light-gray);
  padding: var(--space-md);
  border-radius: 8px;
  margin-bottom: var(--space-lg);
  font-size: 0.9rem;
}

.reply-info p {
  margin: var(--space-xs) 0;
  color: var(--text-medium);
}

.reply-info strong {
  color: var(--text-dark);
}

/* Admin Test Email Button */
.admin-test-email {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
}

.admin-test-email .btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  background: var(--primary-green);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.admin-test-email .btn-sm:hover {
  background: var(--primary-green-dark);
  transform: translateY(-2px);
}

.admin-test-email .btn-sm:disabled {
  background: var(--text-light);
  cursor: not-allowed;
  transform: none;
}