/**
 * 파일명: archive-course.css
 * 파일위치: /wp-content/plugins/joyn-lms/assets/css/
 * 
 * 강의 목록 페이지 스타일 - 모던 미니멀 버전
 */

/* Remix Icon CDN */
@import url('https://cdn.jsdelivr.net/npm/remixicon@4.0.0/fonts/remixicon.css');

/* ==========================================================================
   CSS 변수 시스템
   ========================================================================== */
:root {
  /* Colors */
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  
  --secondary: #f59e0b;
  --secondary-light: #fbbf24;
  
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --background: #ffffff;
  --background-secondary: #f9fafb;
  --border: #e5e7eb;
  
  /* 자동 반응형 Typography */
  --text-xs: clamp(0.75rem, 2vw, 0.875rem);
  --text-sm: clamp(0.875rem, 2.5vw, 1rem);
  --text-base: clamp(1rem, 3vw, 1.125rem);
  --text-lg: clamp(1.125rem, 3.5vw, 1.25rem);
  --text-xl: clamp(1.25rem, 4vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 5vw, 2rem);
  --text-3xl: clamp(1.875rem, 6vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 7vw, 3rem);
  
  /* 자동 반응형 Spacing */
  --space-xs: clamp(0.25rem, 1vw, 0.5rem);
  --space-sm: clamp(0.5rem, 2vw, 1rem);
  --space-md: clamp(1rem, 3vw, 1.5rem);
  --space-lg: clamp(1.5rem, 4vw, 2rem);
  --space-xl: clamp(2rem, 5vw, 3rem);
  --space-2xl: clamp(3rem, 6vw, 4rem);
  
  /* Layout */
  --container: min(100%, 1200px);
  --card-width: clamp(280px, 45vw, 380px);
  
  /* Effects */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius: 0.75rem;
  --transition: 0.2s ease;
}

/* ==========================================================================
   기본 레이아웃
   ========================================================================== */
* {
  box-sizing: border-box;
}

.joyn-courses-archive {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-md);
}

/* ==========================================================================
   헤더
   ========================================================================== */
.archive-header {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: var(--space-2xl) var(--space-xl);
  border-radius: var(--radius);
  margin-bottom: var(--space-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.archive-header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.3; }
}

.archive-title {
  font-size: var(--text-4xl);
  margin: 0 0 var(--space-md);
  font-weight: 700;
  position: relative;
}

.archive-description {
  font-size: var(--text-lg);
  opacity: 0.95;
  margin-bottom: var(--space-xl);
  line-height: 1.6;
  position: relative;
}

.archive-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  position: relative;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.stat-number {
  font-size: var(--text-3xl);
  font-weight: 700;
}

.stat-label {
  font-size: var(--text-sm);
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   필터
   ========================================================================== */
.archive-filters {
  background: var(--background);
  padding: var(--space-lg);
  border-radius: var(--radius);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow);
}

.filters-form {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

.filter-search {
  flex: 1;
  min-width: min(100%, 300px);
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  padding-right: calc(var(--space-md) * 2.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: var(--text-base);
  transition: all var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-50);
}

.search-button {
  position: absolute;
  right: var(--space-xs);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  padding: var(--space-sm);
  cursor: pointer;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.search-button:hover {
  color: var(--primary);
}

.filter-options {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  flex-wrap: wrap;
}

.filter-select {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--background);
  cursor: pointer;
  font-size: var(--text-sm);
  transition: all var(--transition);
}

.filter-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-50);
}

.filter-button {
  padding: var(--space-sm) var(--space-lg);
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.filter-button:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.reset-filters {
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-sm);
  font-size: var(--text-sm);
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.reset-filters:hover {
  color: var(--primary);
}

/* ==========================================================================
   결과 정보
   ========================================================================== */
.results-info {
  margin-bottom: var(--space-lg);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

/* ==========================================================================
   강의 그리드
   ========================================================================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card-width), 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.course-card {
  background: var(--background);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.course-card-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.course-thumbnail {
  position: relative;
  padding-top: 60%;
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  overflow: hidden;
}

.course-thumbnail img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.course-card:hover .course-thumbnail img {
  transform: scale(1.05);
}

.thumbnail-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.thumbnail-placeholder i {
  font-size: var(--text-4xl);
  color: rgba(255, 255, 255, 0.8);
}

.price-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  color: white;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
}

.price-badge.free {
  background: var(--success);
}

.level-badge {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
}

.level-badge.beginner {
  background: var(--success);
  color: white;
}

.level-badge.intermediate {
  background: var(--warning);
  color: white;
}

.level-badge.advanced {
  background: var(--error);
  color: white;
}

.course-info {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-category {
  color: var(--primary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  letter-spacing: 0.5px;
}

.course-title {
  font-size: var(--text-lg);
  margin: 0 0 var(--space-sm);
  color: var(--text-primary);
  line-height: 1.4;
  font-weight: 600;
}

.course-excerpt {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex: 1;
}

.course-instructor {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.course-instructor img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}

.course-meta {
  display: flex;
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.meta-item i {
  font-size: var(--text-sm);
  color: var(--primary);
}

/* ==========================================================================
   페이지네이션
   ========================================================================== */
.courses-pagination {
  text-align: center;
  margin: var(--space-xl) 0;
}

.courses-pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-sm);
  margin: 0 var(--space-xs);
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition);
}

.courses-pagination .page-numbers:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.courses-pagination .current {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.courses-pagination .dots {
  border: none;
  background: none;
  cursor: default;
}

.courses-pagination .dots:hover {
  background: none;
  transform: none;
  box-shadow: none;
}

/* ==========================================================================
   결과 없음
   ========================================================================== */
.no-courses {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--background);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.no-courses i {
  font-size: clamp(3rem, 8vw, 5rem);
  color: var(--border);
  margin-bottom: var(--space-lg);
  display: block;
}

.no-courses h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.no-courses p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  font-size: var(--text-base);
}

/* ==========================================================================
   미디어 쿼리 (최소한만 사용)
   ========================================================================== */
@media (min-width: 768px) {
  .filters-form {
    flex-wrap: nowrap;
  }
  
  .filter-search {
    min-width: 300px;
  }
}