/**
 * 파일명: public.css
 * 파일위치: /wp-content/plugins/joyn-lms/assets/css/
 * 
 * Joyn LMS 공통 프론트엔드 CSS - 디자인 시스템 v3.0
 * joyn-common 연동 최적화
 */

/* ==========================================================================
   CSS 변수 시스템 (joyn-common과 호환)
   ========================================================================== */
:root {
  /* Primary Colors - Joyn Design System v3.0 */
  --joyn-primary: #4f46e5;
  --joyn-primary-hover: #4338ca;
  --joyn-primary-light: #eef2ff;
  --joyn-primary-dark: #3730a3;
  
  /* Secondary & Status Colors */
  --joyn-secondary: #f59e0b;
  --joyn-success: #10b981;
  --joyn-success-light: #ecfdf5;
  --joyn-error: #ef4444;
  --joyn-error-light: #fef2f2;
  --joyn-warning: #f59e0b;
  --joyn-warning-light: #fffbeb;
  --joyn-info: #3b82f6;
  --joyn-info-light: #eff6ff;
  
  /* Neutral Colors */
  --joyn-gray-50: #f9fafb;
  --joyn-gray-100: #f3f4f6;
  --joyn-gray-200: #e5e7eb;
  --joyn-gray-300: #d1d5db;
  --joyn-gray-400: #9ca3af;
  --joyn-gray-500: #6b7280;
  --joyn-gray-600: #4b5563;
  --joyn-gray-700: #374151;
  --joyn-gray-800: #1f2937;
  --joyn-gray-900: #111827;
  
  /* Text & Background */
  --joyn-text: #111827;
  --joyn-text-secondary: #4b5563;
  --joyn-text-muted: #6b7280;
  --joyn-bg: #fff;
  --joyn-bg-secondary: #f9fafb;
  --joyn-border: #e5e7eb;
  --joyn-border-light: #f3f4f6;
  
  /* Typography - v3.0 강화된 폰트 */
  --joyn-text-xs: .875rem;
  --joyn-text-sm: .9375rem;
  --joyn-text-base: 1rem;
  --joyn-text-lg: 1.125rem;
  --joyn-text-xl: 1.25rem;
  --joyn-text-2xl: 1.5rem;
  --joyn-text-3xl: 1.875rem;
  
  --joyn-font-normal: 450;
  --joyn-font-medium: 550;
  --joyn-font-semibold: 650;
  --joyn-font-bold: 750;
  --joyn-font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --joyn-space-1: .25rem;
  --joyn-space-2: .5rem;
  --joyn-space-3: .75rem;
  --joyn-space-4: 1rem;
  --joyn-space-5: 1.25rem;
  --joyn-space-6: 1.5rem;
  --joyn-space-8: 2rem;
  
  /* Border Radius */
  --joyn-radius-sm: .375rem;
  --joyn-radius-md: .5rem;
  --joyn-radius-lg: .75rem;
  --joyn-radius-xl: 1rem;
  --joyn-radius-full: 9999px;
  
  /* Shadows */
  --joyn-shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --joyn-shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --joyn-shadow-md: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -1px rgba(0,0,0,.04);
  --joyn-shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -2px rgba(0,0,0,.04);
  
  /* Transitions */
  --joyn-transition: 200ms cubic-bezier(.4, 0, .2, 1);
}

/* ==========================================================================
   기본 스타일 리셋 및 기본 설정
   ========================================================================== */
.joyn-lms-container {
  font-family: var(--joyn-font-sans);
  font-size: var(--joyn-text-base);
  font-weight: var(--joyn-font-normal);
  line-height: 1.6;
  color: var(--joyn-text);
  background-color: var(--joyn-bg);
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   버튼 스타일 - v3.0 강화
   ========================================================================== */
.joyn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--joyn-space-2);
  padding: var(--joyn-space-4) var(--joyn-space-6);
  font-family: inherit;
  font-size: var(--joyn-text-base);
  font-weight: var(--joyn-font-semibold);
  line-height: 1;
  border: 2px solid var(--joyn-border);
  border-radius: var(--joyn-radius-lg);
  background: var(--joyn-bg);
  color: var(--joyn-text-secondary);
  cursor: pointer;
  transition: all var(--joyn-transition);
  text-decoration: none;
  white-space: nowrap;
  min-height: 52px;
}

.joyn-btn:hover:not(:disabled) {
  background: var(--joyn-bg-secondary);
  border-color: var(--joyn-primary-light);
  color: var(--joyn-primary);
}

.joyn-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.joyn-btn i {
  font-size: 1.25rem;
}

.joyn-btn-primary {
  background: var(--joyn-primary);
  border-color: var(--joyn-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(79, 70, 229, .25);
}

.joyn-btn-primary:hover:not(:disabled) {
  background: var(--joyn-primary-hover);
  border-color: var(--joyn-primary-hover);
  color: #fff;
}

.joyn-btn-success {
  background: var(--joyn-success);
  border-color: var(--joyn-success);
  color: #fff;
}

.joyn-btn-success:hover:not(:disabled) {
  background: #059669;
  border-color: #059669;
}

.joyn-btn-sm {
  padding: var(--joyn-space-2) var(--joyn-space-4);
  font-size: var(--joyn-text-sm);
  min-height: 40px;
}

.joyn-btn-lg {
  padding: var(--joyn-space-5) var(--joyn-space-8);
  font-size: var(--joyn-text-lg);
  min-height: 56px;
}

/* ==========================================================================
   카드 스타일 - v3.0
   ========================================================================== */
.joyn-card {
  background: var(--joyn-bg);
  border: 1px solid var(--joyn-border-light);
  border-radius: var(--joyn-radius-xl);
  box-shadow: var(--joyn-shadow);
  overflow: hidden;
  transition: box-shadow var(--joyn-transition);
}

.joyn-card:hover {
  box-shadow: var(--joyn-shadow-md);
}

.joyn-card-header {
  padding: var(--joyn-space-6);
  border-bottom: 1px solid var(--joyn-border-light);
}

.joyn-card-body {
  padding: var(--joyn-space-6);
}

.joyn-card-footer {
  padding: var(--joyn-space-6);
  border-top: 1px solid var(--joyn-border-light);
  background: var(--joyn-gray-50);
}

/* ==========================================================================
   폼 스타일 - v3.0
   ========================================================================== */
.joyn-form-group {
  margin-bottom: var(--joyn-space-6);
}

.joyn-form-label {
  display: block;
  margin-bottom: var(--joyn-space-2);
  font-size: var(--joyn-text-sm);
  font-weight: var(--joyn-font-semibold);
  color: var(--joyn-text);
}

.joyn-form-input,
.joyn-form-select,
.joyn-form-textarea {
  width: 100%;
  padding: var(--joyn-space-4);
  font-family: inherit;
  font-size: var(--joyn-text-base);
  font-weight: var(--joyn-font-normal);
  color: var(--joyn-text);
  background: var(--joyn-bg);
  border: 2px solid var(--joyn-border);
  border-radius: var(--joyn-radius-lg);
  transition: all var(--joyn-transition);
  min-height: 52px;
}

.joyn-form-input:focus,
.joyn-form-select:focus,
.joyn-form-textarea:focus {
  outline: none;
  border-color: var(--joyn-primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, .1);
}

.joyn-form-input::placeholder,
.joyn-form-textarea::placeholder {
  color: var(--joyn-text-muted);
}

.joyn-form-textarea {
  min-height: 140px;
  resize: vertical;
}

/* ==========================================================================
   알림 메시지 - v3.0
   ========================================================================== */
.joyn-alert {
  padding: var(--joyn-space-4) var(--joyn-space-5);
  border-radius: var(--joyn-radius-lg);
  border: 1px solid;
  margin-bottom: var(--joyn-space-4);
  font-size: var(--joyn-text-sm);
  font-weight: var(--joyn-font-medium);
}

.joyn-alert-success {
  background: var(--joyn-success-light);
  border-color: var(--joyn-success);
  color: #065f46;
}

.joyn-alert-warning {
  background: var(--joyn-warning-light);
  border-color: var(--joyn-warning);
  color: #92400e;
}

.joyn-alert-error {
  background: var(--joyn-error-light);
  border-color: var(--joyn-error);
  color: #991b1b;
}

.joyn-alert-info {
  background: var(--joyn-info-light);
  border-color: var(--joyn-info);
  color: #1e40af;
}

/* ==========================================================================
   진행률 바 - v3.0
   ========================================================================== */
.joyn-progress {
  width: 100%;
  height: 10px;
  background: var(--joyn-gray-200);
  border-radius: var(--joyn-radius-full);
  overflow: hidden;
}

.joyn-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--joyn-primary), var(--joyn-primary-hover));
  border-radius: var(--joyn-radius-full);
  transition: width 0.6s ease;
}

/* ==========================================================================
   배지 - v3.0
   ========================================================================== */
.joyn-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: var(--joyn-text-sm);
  font-weight: var(--joyn-font-semibold);
  border-radius: var(--joyn-radius-full);
  background: var(--joyn-primary-light);
  color: var(--joyn-primary);
}

.joyn-badge-success {
  background: var(--joyn-success-light);
  color: var(--joyn-success);
}

.joyn-badge-warning {
  background: var(--joyn-warning-light);
  color: var(--joyn-warning);
}

.joyn-badge-error {
  background: var(--joyn-error-light);
  color: var(--joyn-error);
}

/* ==========================================================================
   로딩 스피너 - v3.0
   ========================================================================== */
.joyn-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 3px solid var(--joyn-border);
  border-top-color: var(--joyn-primary);
  border-radius: 50%;
  animation: joyn-spin 1s linear infinite;
}

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

.joyn-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

/* ==========================================================================
   강의 카드 - v3.0 새 디자인
   ========================================================================== */
.joyn-courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--joyn-space-6);
}

.joyn-course-card {
  background: var(--joyn-bg);
  border: 1px solid var(--joyn-border-light);
  border-radius: var(--joyn-radius-xl);
  overflow: hidden;
  box-shadow: var(--joyn-shadow);
  transition: all var(--joyn-transition);
}

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

.joyn-course-card .course-thumbnail {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.joyn-course-card .course-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.joyn-course-card .course-content {
  padding: var(--joyn-space-5);
}

.joyn-course-card .course-content h3 {
  margin: 0 0 var(--joyn-space-3);
  font-size: var(--joyn-text-lg);
  font-weight: var(--joyn-font-bold);
  line-height: 1.4;
}

.joyn-course-card .course-content h3 a {
  color: var(--joyn-text);
  text-decoration: none;
  transition: color var(--joyn-transition);
}

.joyn-course-card .course-content h3 a:hover {
  color: var(--joyn-primary);
}

.joyn-course-card .course-excerpt {
  color: var(--joyn-text-muted);
  font-size: var(--joyn-text-sm);
  line-height: 1.6;
  margin-bottom: var(--joyn-space-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.joyn-course-card .course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--joyn-space-2);
}

.joyn-course-card .course-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--joyn-space-1);
  padding: var(--joyn-space-1) var(--joyn-space-3);
  background: var(--joyn-gray-100);
  border-radius: var(--joyn-radius-full);
  font-size: var(--joyn-text-xs);
  font-weight: var(--joyn-font-medium);
  color: var(--joyn-text-secondary);
}

.joyn-course-card .course-level {
  background: var(--joyn-primary-light) !important;
  color: var(--joyn-primary) !important;
}

/* ==========================================================================
   수강 버튼 - v3.0
   ========================================================================== */
.joyn-enroll-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--joyn-space-2);
  padding: var(--joyn-space-4) var(--joyn-space-6);
  background: var(--joyn-primary);
  color: #fff;
  font-size: var(--joyn-text-base);
  font-weight: var(--joyn-font-semibold);
  border: none;
  border-radius: var(--joyn-radius-lg);
  cursor: pointer;
  transition: all var(--joyn-transition);
  min-height: 52px;
  box-shadow: 0 2px 8px rgba(79, 70, 229, .25);
}

.joyn-enroll-button:hover {
  background: var(--joyn-primary-hover);
}

.joyn-enroll-button.enrolled {
  background: var(--joyn-success);
}

.joyn-enroll-button.enrolled:hover {
  background: #059669;
}

/* ==========================================================================
   내 강의 목록 - v3.0
   ========================================================================== */
.joyn-my-courses {
  display: flex;
  flex-direction: column;
  gap: var(--joyn-space-4);
}

.my-course-item {
  background: var(--joyn-bg);
  border: 1px solid var(--joyn-border-light);
  border-radius: var(--joyn-radius-xl);
  padding: var(--joyn-space-5);
  box-shadow: var(--joyn-shadow-sm);
  transition: all var(--joyn-transition);
}

.my-course-item:hover {
  box-shadow: var(--joyn-shadow);
}

.my-course-item h4 {
  margin: 0 0 var(--joyn-space-4);
  font-size: var(--joyn-text-lg);
  font-weight: var(--joyn-font-bold);
}

.my-course-item h4 a {
  color: var(--joyn-text);
  text-decoration: none;
}

.my-course-item h4 a:hover {
  color: var(--joyn-primary);
}

.my-course-item .course-progress {
  display: flex;
  align-items: center;
  gap: var(--joyn-space-4);
}

.my-course-item .progress-bar {
  flex: 1;
  height: 10px;
  background: var(--joyn-gray-200);
  border-radius: var(--joyn-radius-full);
  overflow: hidden;
}

.my-course-item .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--joyn-primary), var(--joyn-success));
  border-radius: var(--joyn-radius-full);
  transition: width 0.6s ease;
}

.my-course-item .progress-text {
  font-size: var(--joyn-text-sm);
  font-weight: var(--joyn-font-semibold);
  color: var(--joyn-primary);
  white-space: nowrap;
}

/* ==========================================================================
   그리드 시스템
   ========================================================================== */
.joyn-grid {
  display: grid;
  gap: var(--joyn-space-6);
}

.joyn-grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.joyn-grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.joyn-grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ==========================================================================
   유틸리티 클래스
   ========================================================================== */
.joyn-text-center { text-align: center; }
.joyn-text-primary { color: var(--joyn-primary); }
.joyn-text-muted { color: var(--joyn-text-muted); }
.joyn-hidden { display: none; }
.joyn-flex { display: flex; }
.joyn-items-center { align-items: center; }
.joyn-justify-between { justify-content: space-between; }
.joyn-gap-4 { gap: var(--joyn-space-4); }
.joyn-mb-4 { margin-bottom: var(--joyn-space-4); }
.joyn-mt-4 { margin-top: var(--joyn-space-4); }

/* ==========================================================================
   반응형 디자인 - v3.0 모바일 최적화
   ========================================================================== */
@media (max-width: 768px) {
  :root {
    --joyn-text-xs: .9375rem;
    --joyn-text-sm: 1rem;
    --joyn-text-base: 1.0625rem;
    --joyn-text-lg: 1.1875rem;
    --joyn-text-xl: 1.375rem;
  }
  
  .joyn-btn {
    min-height: 56px;
  }
  
  .joyn-form-input,
  .joyn-form-select {
    min-height: 56px;
    font-size: 16px; /* iOS zoom 방지 */
  }
  
  .joyn-courses-grid {
    grid-template-columns: 1fr;
  }
  
  .joyn-grid-cols-2,
  .joyn-grid-cols-3,
  .joyn-grid-cols-4 {
    grid-template-columns: 1fr;
  }
  
  .joyn-card-header,
  .joyn-card-body,
  .joyn-card-footer {
    padding: var(--joyn-space-4);
  }
}

/* 터치 디바이스 최적화 */
@media (pointer: coarse) {
  .joyn-btn,
  .joyn-form-input,
  .joyn-enroll-button {
    min-height: 52px;
  }
}

/* ==========================================================================
   애니메이션
   ========================================================================== */
.joyn-fade-in {
  animation: joyn-fade-in 0.3s ease-in-out;
}

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