/* ==========================================================================
   어린이 영상 칼럼 - index.css (대시보드 포털 & 개별 칼럼 최종 통합 본)
   Theme: Artistic Watercolor Sketchbook (Soft Sage, Warm Sand & Cream HSL)
   ========================================================================== */

:root {
  --bg-main: #f5f4f0;         /* 와트만지 느낌의 은은한 미색 */
  --bg-card: #ffffff;         /* 순백색 스케치북 지면 */
  --text-main: #2b2e2a;       /* 다크 차콜 그린 */
  --text-muted: #5e635c;      /* 중간 톤 차콜 */
  --accent-primary: #58705c;  /* 소프트 세이지 그린 */
  --accent-secondary: #c2b280;/* 웜 샌드 골드 */
  --accent-light: #e8ece9;    /* 연한 그린 틴트 */
  
  --font-serif: 'Noto Serif KR', Georgia, serif;
  --font-sans: 'Outfit', 'Noto Sans KR', sans-serif;
  
  --shadow-watercolor: 0 10px 30px rgba(88, 112, 92, 0.06);
  --border-watercolor: 1px solid rgba(88, 112, 92, 0.12);
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* ==========================================
   1. 공통 및 레이아웃 리셋
   ========================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body, html {
  height: 100%;
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-main);
}

/* ==========================================
   2. 포털 대시보드 (index.html) 전용 레이아웃 & 사이드바 스타일
   ========================================== */
.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
}

.sidebar {
  flex: 0 0 340px;
  width: 340px;
}

.resizer {
  flex: 0 0 6px;
  width: 6px;
  cursor: col-resize;
  background-color: rgba(88, 112, 92, 0.08);
  transition: background-color 0.2s ease;
  z-index: 20;
}

.resizer:hover,
.resizer.is-dragging {
  background-color: var(--accent-primary);
}

.viewer-container {
  flex: 1 1 auto;
  min-width: 0;
}

@media (max-width: 850px) {
  .app-container {
    flex-direction: column;
  }
  .sidebar {
    flex: 0 0 45vh !important;
    width: 100% !important;
    height: 45vh !important;
    border-right: none !important;
    border-bottom: 2px solid rgba(88, 112, 92, 0.1) !important;
  }
  .resizer {
    display: none;
  }
  .viewer-container {
    height: 55vh !important;
  }
}

.sidebar {
  background: var(--bg-card);
  border-right: 1px solid rgba(88, 112, 92, 0.1);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  box-shadow: 2px 0 15px rgba(88, 112, 92, 0.04);
  z-index: 10;
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(88, 112, 92, 0.08);
  background-color: var(--bg-main);
}

.sidebar-header h1 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--accent-primary);
  letter-spacing: -0.02em;
}

.sidebar-header p {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.sidebar-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid rgba(88, 112, 92, 0.08);
  background-color: var(--bg-main);
}

.sidebar-tabs button {
  background: rgba(88, 112, 92, 0.04);
  border: none;
  padding: 0.9rem 0;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
  border-bottom: 3px solid transparent;
  outline: none;
}

.sidebar-tabs button:hover {
  color: var(--accent-primary);
  background-color: var(--accent-light);
}

.sidebar-tabs button.active {
  background: #ffffff;
  color: var(--accent-primary);
  border-bottom: 3px solid var(--accent-primary);
}

.vocab-counter {
  background-color: var(--accent-primary);
  color: #ffffff;
  font-size: 0.72rem;
  padding: 0.1rem 0.4rem;
  border-radius: 50px;
  margin-left: 0.3rem;
  font-weight: 700;
}

.control-panel {
  padding: 1.2rem;
  border-bottom: 1px solid rgba(88, 112, 92, 0.08);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background-color: #fafbfa;
}

.search-box-wrapper {
  position: relative;
}

.search-input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.2rem;
  border: 1px solid rgba(88, 112, 92, 0.2);
  border-radius: 10px;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: #ffffff;
  outline: none;
  transition: var(--transition-smooth);
}

.search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(88, 112, 92, 0.1);
}

.search-icon {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  color: var(--accent-primary);
}

.filter-group-label {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.grade-filters {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.3rem;
}

.filter-btn-sm {
  border: 1px solid rgba(88, 112, 92, 0.15);
  background: #ffffff;
  color: var(--text-muted);
  padding: 0.35rem 0;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-align: center;
  outline: none;
}

.filter-btn-sm:hover {
  background: var(--accent-light);
  color: var(--accent-primary);
}

.filter-btn-sm.active {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(88, 112, 92, 0.15);
}

.category-select-wrapper select {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid rgba(88, 112, 92, 0.2);
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  background-color: #ffffff;
  outline: none;
  cursor: pointer;
}

.list-container {
  flex: 1;
  overflow-y: auto;
  background-color: #ffffff;
}

.list-header {
  padding: 0.8rem 1.2rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(88, 112, 92, 0.04);
  display: flex;
  justify-content: space-between;
  background-color: #ffffff;
  position: sticky;
  top: 0;
  z-index: 2;
}

.episode-list {
  list-style: none;
}

.episode-item {
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid rgba(88, 112, 92, 0.04);
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.episode-item:hover {
  background-color: var(--bg-main);
}

.episode-item.active {
  background-color: var(--accent-light);
  border-left: 4px solid var(--accent-primary);
  padding-left: 0.95rem;
}

.ep-item-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  font-weight: 700;
}

.ep-item-badge {
  background-color: rgba(88, 112, 92, 0.08);
  color: var(--accent-primary);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

.ep-item-target {
  color: var(--accent-secondary);
}

.ep-item-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
}

.viewer-container {
  height: 100%;
  width: 100%;
  background: var(--bg-main);
  display: flex;
  flex-direction: column;
  position: relative;
}

.viewer-iframe {
  flex: 1;
  width: 100%;
  height: 100%;
  border: none;
  background-color: var(--bg-main);
}

.loading-spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: rgba(255, 255, 255, 0.9);
  padding: 1rem 2rem;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(88,112,92,0.1);
  display: none;
  align-items: center;
  gap: 0.5rem;
  z-index: 100;
}


/* ==========================================
   3. 개별 에피소드 칼럼 페이지 (epX/index.html) 전용 스타일
   ========================================== */

/* 3-0. 상단 바로가기 네비게이션 바 (이전편·전체목차·공유하기·다음편) */
.episode-nav-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(88, 112, 92, 0.1);
  box-shadow: 0 2px 12px rgba(88, 112, 92, 0.06);
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.7rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  text-decoration: none;
  color: var(--accent-primary);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.5rem 1.1rem;
  border-radius: 50px;
  background: var(--accent-light);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: var(--transition-smooth);
}

.nav-link:hover {
  background: var(--accent-primary);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(88, 112, 92, 0.2);
}

.nav-link.home-btn {
  background: var(--accent-primary);
  color: #ffffff;
}

.nav-link.home-btn:hover {
  background: #485c4b;
}

.nav-link.share-btn {
  background: var(--accent-secondary);
  color: #ffffff;
}

.nav-link.share-btn:hover {
  background: #a89660;
  color: #ffffff;
}

.nav-link.disabled {
  pointer-events: none;
  opacity: 0.3;
}

.nav-title-center {
  flex: 1;
  min-width: 0;
  text-align: center;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1rem;
  color: var(--text-main);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 0.8rem;
}

@media (max-width: 850px) {
  .nav-content {
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.6rem 1rem;
  }
  .nav-title-center {
    order: -1;
    flex-basis: 100%;
    margin-bottom: 0.4rem;
    white-space: normal;
  }
  .nav-link {
    font-size: 0.78rem;
    padding: 0.45rem 0.85rem;
  }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.top-banner-wrapper {
  position: relative;
  width: 100%;
  height: 420px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 2px solid var(--accent-light);
}

.banner-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  filter: saturate(0.9) contrast(1.02);
  transform: scale(1.01);
}

.banner-overlay {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #2b2e2a;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(8px);
  padding: 2.5rem 3.5rem;
  border-radius: 24px;
  box-shadow: var(--shadow-watercolor);
  border: var(--border-watercolor);
  max-width: 800px;
  margin: 0 1rem;
}

.badge {
  display: inline-block;
  background-color: var(--accent-light);
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.banner-overlay h1 {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 0.8rem;
}

.banner-overlay h1 span {
  color: var(--accent-primary);
  border-bottom: 3px double var(--accent-secondary);
}

.banner-overlay .subtitle {
  font-size: 1rem;
  color: var(--text-muted);
}

.tab-section {
  margin-bottom: 3rem;
  text-align: center;
}

.tab-header-label {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.tab-buttons {
  display: inline-flex;
  background: rgba(255, 255, 255, 0.6);
  border: var(--border-watercolor);
  border-radius: 50px;
  padding: 0.4rem;
  box-shadow: var(--shadow-watercolor);
}

.tab-btn {
  border: none;
  background: transparent;
  padding: 0.8rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.tab-btn:hover {
  color: var(--accent-primary);
  background: rgba(88, 112, 92, 0.05);
}

.tab-btn.active {
  background-color: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 6px 15px rgba(88, 112, 92, 0.2);
}

.content-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.player-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.video-card {
  background-color: var(--bg-card);
  border-radius: 24px;
  border: var(--border-watercolor);
  box-shadow: var(--shadow-watercolor);
  padding: 1.5rem;
}

.video-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 16px;
  overflow: hidden;
  background-color: #000000;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.video-container iframe,
#yt-player-main {
  position: absolute;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
  border: none;
  display: block;
}

.player-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.player-controls {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.2rem;
}

.control-btn {
  flex: 1;
  border: none;
  padding: 0.8rem;
  font-weight: 700;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.control-btn.play {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.control-btn.play:hover {
  background-color: #485c4b;
}

.control-btn.pause {
  background-color: var(--accent-light);
  color: var(--accent-primary);
}

.control-btn.pause:hover {
  background-color: #dbe2dd;
}

.control-btn.replay {
  background-color: transparent;
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
}

.control-btn.replay:hover {
  background-color: var(--accent-light);
}

.range-slider-container {
  margin-top: 1.5rem;
  background: var(--bg-main);
  border-radius: 16px;
  padding: 1.2rem;
  border: 1px solid rgba(88, 112, 92, 0.06);
}

.range-slider-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
  font-weight: 700;
}

.range-label {
  color: var(--accent-primary);
}

.range-value {
  color: var(--text-main);
  font-family: var(--font-sans);
}

.range-slider-track-wrapper {
  position: relative;
  height: 10px;
  margin: 1.5rem 0;
}

.slider-track {
  position: absolute;
  height: 6px;
  width: 100%;
  background: #e2e8f0;
  border-radius: 3px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
}

.range-slider-track-wrapper input[type="range"] {
  position: absolute;
  pointer-events: none;
  -webkit-appearance: none;
  z-index: 2;
  height: 10px;
  width: 100%;
  background: none;
  top: 50%;
  transform: translateY(-50%);
}

.range-slider-track-wrapper input[type="range"]::-webkit-slider-thumb {
  pointer-events: auto;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 2px solid #ffffff;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  transition: transform 0.1s;
}

.range-slider-track-wrapper input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.range-slider-footer {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: right;
}

.custom-loops-card {
  background-color: var(--bg-card);
  border-radius: 24px;
  border: var(--border-watercolor);
  box-shadow: var(--shadow-watercolor);
  padding: 1.5rem;
}

.custom-loops-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.custom-loop-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.custom-loop-input {
  flex: 1;
  padding: 0.6rem 1rem;
  border: 1px solid rgba(88, 112, 92, 0.2);
  border-radius: 10px;
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition-smooth);
}

.custom-loop-input:focus {
  border-color: var(--accent-primary);
}

.custom-loop-save-btn {
  background-color: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 0.6rem 1rem;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.custom-loop-save-btn:hover {
  background-color: #485c4b;
}

.custom-loops-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.custom-loop-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-main);
  padding: 0.7rem 1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: var(--transition-smooth);
}

.custom-loop-item:hover {
  border-color: rgba(88, 112, 92, 0.15);
  background-color: var(--accent-light);
}

.custom-loop-info {
  flex: 1;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.custom-loop-title-text {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
}

.custom-loop-time-text {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.custom-loop-delete-btn {
  background: none;
  border: none;
  color: #ccc;
  cursor: pointer;
  padding: 0.2rem;
  transition: var(--transition-smooth);
  font-size: 0.8rem;
}

.custom-loop-delete-btn:hover {
  color: #e53e3e;
  transform: scale(1.1);
}

.segment-chips-card {
  background-color: var(--bg-card);
  border-radius: 24px;
  border: var(--border-watercolor);
  box-shadow: var(--shadow-watercolor);
  padding: 1.5rem;
}

.segment-chips-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.chips-container {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.seg-chip-btn {
  border: none;
  background: var(--bg-main);
  padding: 0.8rem 1.2rem;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.seg-chip-btn:hover {
  background: var(--accent-light);
  border-color: rgba(88, 112, 92, 0.15);
  transform: translateX(4px);
}

.seg-chip-btn.active {
  background-color: var(--accent-light);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.column-section {
  background-color: var(--bg-card);
  border-radius: 24px;
  border: var(--border-watercolor);
  box-shadow: var(--shadow-watercolor);
  padding: 2.5rem;
  min-height: 600px;
  position: relative;
}

.grade-content {
  display: none;
}

.grade-content.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

.column-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--text-main);
  margin-bottom: 2rem;
  line-height: 1.4;
  border-left: 4px solid var(--accent-primary);
  padding-left: 1rem;
}

.paragraph-card {
  margin-bottom: 2.2rem;
}

.paragraph-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--accent-primary);
  margin-bottom: 0.8rem;
}

.paragraph-card p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

.paragraph-card p strong {
  color: var(--accent-primary);
  font-weight: 800;
}

.watercolor-illustration {
  width: 100%;
  height: 240px;
  border-radius: 16px;
  margin: 1.5rem 0 0.5rem;
  background-image: url('../images/watercolor_grid.png');
  background-size: 400% 200%; /* 4열 2행 (총 8개 파트) 격자 8공법 구성 */
  border: var(--border-watercolor);
  box-shadow: inset 0 0 10px rgba(0,0,0,0.02);
}

.watercolor-illustration.card-1 { background-position: 0% 0%; }
.watercolor-illustration.card-2 { background-position: 33.333% 0%; }
.watercolor-illustration.card-3 { background-position: 66.666% 0%; }
.watercolor-illustration.card-4 { background-position: 100% 0%; }
.watercolor-illustration.card-5 { background-position: 0% 100%; }
.watercolor-illustration.card-6 { background-position: 33.333% 100%; }
.watercolor-illustration.card-7 { background-position: 66.666% 100%; }
.watercolor-illustration.card-8 { background-position: 100% 100%; }

.illustration-caption {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
  margin-bottom: 1.5rem;
}

.practice-box {
  background: var(--bg-main);
  border: 1.5px dashed rgba(88, 112, 92, 0.3);
  border-radius: 14px;
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
}

.practice-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

.practice-input {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1.5px solid rgba(88, 112, 92, 0.25);
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-main);
  background-color: #ffffff;
  outline: none;
  transition: var(--transition-smooth);
}

.practice-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(88, 112, 92, 0.08);
}

.thought-notebook-card {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 2px dashed rgba(88, 112, 92, 0.15);
}

.thought-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
}

/* 📝 독후 활동지 우측 미니 장식 삽화 (8공법 card-7 책그림 연계) */
.thought-notebook-illustration {
  width: 76px;
  height: 76px;
  background-image: url('../images/watercolor_grid.png');
  background-size: 400% 200%;
  background-position: 66.666% 100%; /* card-7 독후 활동 메타포 메모지/책 디자인 */
  border-radius: 12px;
  border: 1px solid rgba(88, 112, 92, 0.12);
  float: right;
  margin-left: 1rem;
  margin-bottom: 0.5rem;
  box-shadow: 0 4px 10px rgba(88, 112, 92, 0.05);
}

.thought-seeds-list {
  background-color: #fafbfa;
  border: var(--border-watercolor);
  padding: 1.25rem 1.5rem;
  border-radius: 16px;
  margin-bottom: 1.5rem;
}

.thought-seeds-list h4 {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--accent-secondary);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.thought-seed-item {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  padding-left: 1rem;
  position: relative;
}

.thought-seed-item::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: 700;
}

.thought-textarea {
  width: 100%;
  height: 180px;
  padding: 1.2rem;
  border: 1.5px solid rgba(88, 112, 92, 0.25);
  border-radius: 16px;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-main);
  background-color: #ffffff;
  outline: none;
  resize: vertical;
  transition: var(--transition-smooth);
  box-shadow: inset 0 2px 8px rgba(88, 112, 92, 0.02);
}

.thought-textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 4px rgba(88, 112, 92, 0.08);
}

.print-action-row {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
}

.print-btn {
  border: none;
  padding: 0.8rem 1.8rem;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 50px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 6px 20px rgba(88, 112, 92, 0.15);
  transition: var(--transition-smooth);
}

.print-btn.normal {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.print-btn.normal:hover {
  background-color: #485c4b;
}

.print-btn.eco {
  background-color: #7a947d;
  color: #ffffff;
}

.print-btn.eco:hover {
  background-color: #637a66;
}

.main-footer {
  margin-top: 5rem;
  text-align: center;
  padding: 2.5rem 1rem;
  border-top: 1px solid rgba(88, 112, 92, 0.1);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.main-footer p:first-child {
  font-weight: 700;
  margin-bottom: 0.4rem;
}

/* 4. 인터랙티브 사전 툴팁 & 단어장 카드 (사이드바 연계) */
.vocab-word {
  color: var(--text-main);
  border-bottom: 1.5px dashed var(--accent-primary);
  background-color: rgba(88, 112, 92, 0.04);
  padding: 0 0.2rem;
  cursor: help;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.vocab-word:hover {
  background-color: var(--accent-light);
  color: var(--accent-primary);
}

.vocab-highlight-focus {
  animation: pulseHighlight 2s ease infinite alternate;
  border-radius: 4px;
}

@keyframes pulseHighlight {
  0% { background-color: rgba(194, 178, 128, 0.15); box-shadow: 0 0 0 2px rgba(194, 178, 128, 0.2); }
  100% { background-color: rgba(194, 178, 128, 0.5); box-shadow: 0 0 0 6px rgba(194, 178, 128, 0.4); }
}

.vocab-tooltip-box {
  position: absolute;
  background: rgba(255, 255, 255, 0.96);
  border: 1.5px solid var(--accent-primary);
  border-radius: 16px;
  padding: 1.25rem;
  width: 290px;
  box-shadow: 0 10px 25px rgba(88, 112, 92, 0.15);
  z-index: 10000;
  display: none;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-main);
  animation: tooltipFadeIn 0.25s ease;
  pointer-events: auto;
}

@keyframes tooltipFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.tooltip-title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--accent-primary);
  border-bottom: 1px solid rgba(88, 112, 92, 0.1);
  padding-bottom: 0.4rem;
  margin-bottom: 0.6rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tooltip-close {
  cursor: pointer;
  color: #ccc;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.tooltip-close:hover {
  color: var(--accent-primary);
}

.tooltip-section {
  margin-bottom: 0.75rem;
}

.tooltip-label {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent-secondary);
  text-transform: uppercase;
  margin-bottom: 0.15rem;
}

.tooltip-text {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.tooltip-english-section {
  background-color: var(--bg-main);
  border-radius: 8px;
  padding: 0.5rem;
  margin-top: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tooltip-english-word {
  font-weight: 700;
  color: var(--accent-primary);
}

.tooltip-tts-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition-smooth);
}

.tooltip-tts-btn:hover {
  transform: scale(1.2);
}

.tooltip-save-btn {
  width: 100%;
  margin-top: 0.8rem;
  border: 1px solid var(--accent-primary);
  background-color: transparent;
  color: var(--accent-primary);
  padding: 0.45rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.3rem;
}

.tooltip-save-btn:hover {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.tooltip-save-btn.saved {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.vocab-notes-list {
  list-style: none;
  padding: 0.5rem 0;
}

.vocab-card-item {
  padding: 1.1rem 1.3rem;
  border-bottom: 1px solid rgba(88, 112, 92, 0.06);
  transition: var(--transition-smooth);
  background-color: #ffffff;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.vocab-card-item:hover {
  background-color: var(--bg-main);
}

.vocab-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.vocab-card-title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text-main);
}

.vocab-card-english {
  font-size: 0.8rem;
  color: var(--accent-primary);
  font-weight: 600;
  background-color: var(--accent-light);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  margin-left: 0.5rem;
}

.vocab-card-delete {
  background: none;
  border: none;
  color: #ccc;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition-smooth);
}

.vocab-card-delete:hover {
  color: #e53e3e;
}

.vocab-card-meaning {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.vocab-card-sentence {
  font-size: 0.78rem;
  color: var(--accent-secondary);
  border-left: 2px solid var(--accent-secondary);
  padding-left: 0.45rem;
  margin-top: 0.2rem;
  font-style: italic;
}

.vocab-card-source {
  font-size: 0.75rem;
  color: var(--accent-primary);
  text-decoration: underline;
  cursor: pointer;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  margin-top: 0.2rem;
}

/* ==========================================
   📲 QR 공유 팝업 위젯 (QR & Share Widget)
   ========================================== */
.share-modal-box {
  position: absolute;
  top: 65px;
  right: 20px;
  width: 320px;
  background: rgba(255, 255, 255, 0.98);
  border: 1.5px solid var(--accent-primary);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: 0 12px 35px rgba(88, 112, 92, 0.15);
  z-index: 10005;
  display: none;
  text-align: center;
  animation: tooltipFadeIn 0.3s ease;
  color: var(--text-main);
}

.share-modal-box h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--accent-primary);
  margin-bottom: 0.4rem;
}

.share-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 1rem;
}

.qr-container {
  background: #ffffff;
  padding: 0.8rem;
  border-radius: 12px;
  border: 1px solid rgba(88, 112, 92, 0.1);
  display: inline-block;
  margin-bottom: 1rem;
}

.qr-container img {
  display: block;
  width: 140px;
  height: 140px;
}

.share-link-row {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.share-link-row input {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid rgba(88, 112, 92, 0.25);
  border-radius: 8px;
  font-size: 0.8rem;
  outline: none;
  background-color: var(--bg-main);
  color: var(--text-muted);
}

.share-link-row button {
  background-color: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 0.5rem 1rem;
  font-weight: 700;
  font-size: 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.share-link-row button:hover {
  background-color: #485c4b;
}

.share-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  text-decoration: underline;
}

.share-toast {
  background: rgba(88, 112, 92, 0.9);
  color: #ffffff;
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  display: none;
  z-index: 10010;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.share-toast.show {
  display: block;
  animation: tooltipFadeIn 0.2s ease;
}

/* ==========================================
   6. 🖨️ A4 학습지 인쇄(Print) 전용 최적화 스타일
   ========================================== */
@media print {
  .episode-nav-bar,
  .top-banner-wrapper,
  .breadcrumb-nav,
  .tab-section,
  .player-section,
  .print-action-row,
  .main-footer,
  .illustration-caption,
  .vocab-tooltip-box,
  .custom-loops-card,
  .practice-box,
  .share-modal-box {
    display: none !important;
  }

  body, html {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 13pt !important;
    height: auto !important;
    overflow: visible !important;
  }

  .container {
    max-width: 100% !important;
    width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .content-grid {
    display: block !important;
  }

  .column-section {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 0 !important;
    background: transparent !important;
    width: 100% !important;
  }

  .grade-content {
    display: none !important;
  }
  
  .grade-content.active {
    display: block !important;
  }

  .column-title {
    font-size: 22pt !important;
    margin-bottom: 2rem !important;
    color: #000000 !important;
    border-left: 6px solid #58705c !important;
  }

  .paragraph-card {
    margin-bottom: 2.5rem !important;
    page-break-inside: avoid !important;
  }

  .paragraph-card h3 {
    font-size: 15pt !important;
    color: #000000 !important;
    margin-bottom: 0.8rem !important;
  }

  .watercolor-illustration {
    height: 180px !important;
    width: 100% !important;
    margin: 1.5rem 0 !important;
    border: 1px solid #ccc !important;
    page-break-inside: avoid !important;
  }

  .thought-notebook-card {
    margin-top: 3rem !important;
    padding-top: 2rem !important;
    border-top: 2px dashed #000000 !important;
    page-break-inside: avoid !important;
  }

  .thought-header {
    font-size: 16pt !important;
    color: #000000 !important;
  }

  .thought-notebook-illustration {
    display: block !important;
    width: 64px !important;
    height: 64px !important;
    float: right !important;
    border: 1px solid #ccc !important;
  }

  .thought-seeds-list {
    background: #fcfcfc !important;
    border: 1px solid #ddd !important;
  }

  .thought-textarea {
    border: 1px solid #58705c !important;
    height: 250px !important;
    font-size: 12pt !important;
    background-image: linear-gradient(#ffffff 0%, #ffffff 95%, #58705c 95%, #58705c 100%) !important;
    background-size: 100% 2.2rem !important;
    line-height: 2.2rem !important;
    padding: 0.5rem 1rem !important;
    box-shadow: none !important;
    display: block !important;
  }

  .vocab-word {
    border-bottom: 1px dashed #000000 !important;
    background: none !important;
    padding: 0 !important;
  }

  /* 🌿 절약형 2단 인쇄 (2-Column Eco Print Mode) */
  .print-layout-2col .grade-content.active {
    column-count: 2 !important;
    column-gap: 2.5rem !important;
    column-rule: 1.5px dashed rgba(88, 112, 92, 0.3) !important;
    width: 100% !important;
  }

  .print-layout-2col .watercolor-illustration {
    width: 100% !important;
    height: 130px !important;
    margin: 1rem 0 !important;
    column-break-inside: avoid !important;
    break-inside: avoid !important;
  }
  
  .print-layout-2col .thought-notebook-card {
    column-span: all !important;
    margin-top: 2rem !important;
  }
}