:root {
  --naver-green: #00dc64;
  --naver-green-dark: #00b853;
  --brand-dark: #1d2026;
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --text-primary: #1d2026;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
  --viewer-max-width: 690px;
  --viewer-bg: #1d2026;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Malgun Gothic', '맑은 고딕', sans-serif;
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

.hidden {
  display: none !important;
}

.mt-12 {
  margin-top: 12px;
}

/* ==================== GLOBAL HEADER ==================== */
.global-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
}

.brand-logo-img {
  height: 28px;
  width: auto;
  display: block;
  object-fit: contain;
}

.brand-badge {
  background: var(--naver-green);
  color: var(--brand-dark);
  font-weight: 900;
  font-size: 11px;
  letter-spacing: 0.5px;
  padding: 4px 7px;
  border-radius: 5px;
  white-space: nowrap;
}

.series-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
  padding: 0 8px;
}

.series-tabs::-webkit-scrollbar {
  display: none;
}

.series-tab {
  border: none;
  background: transparent;
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  line-height: 1.2;
  transition: all 0.15s ease;
}

.series-tab:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.series-tab.active {
  background: var(--brand-dark);
  color: #ffffff;
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  padding: 10px 16px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-sm {
  padding: 7px 12px;
  font-size: 13px;
  line-height: 1.2;
  border-radius: 7px;
}

.btn-primary {
  background: var(--naver-green);
  color: var(--brand-dark);
}

.btn-primary:hover {
  background: var(--naver-green-dark);
  color: #ffffff;
}

.btn-dark {
  background: var(--brand-dark);
  color: #ffffff;
}

.btn-dark:hover {
  background: #2f343d;
}

.btn-outline {
  background: var(--bg-surface);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--bg-subtle);
  border-color: #cbd5e1;
}

/* ==================== MOBILE SIMULATOR MODE ==================== */
.mobile-sim-banner {
  background: var(--brand-dark);
  color: #ffffff;
  font-size: 13px;
  padding: 9px 16px;
  border-bottom: 1px solid #2a2e39;
}

.sim-banner-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.btn-sim-close {
  background: var(--naver-green);
  color: var(--brand-dark);
  border: none;
  padding: 5px 11px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 12px;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
}

body.mobile-sim-mode {
  background: #e2e8f0;
}

body.mobile-sim-mode .device-wrapper {
  width: 390px;
  max-width: 100%;
  margin: 22px auto 40px;
  background: var(--bg-page);
  border-radius: 36px;
  border: 10px solid var(--brand-dark);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.25);
  overflow: hidden;
  min-height: 780px;
  position: relative;
}

/* ==================== 1. SERIES HOME & EPISODE LIST ==================== */
.series-view {
  max-width: 1040px;
  margin: 24px auto 64px;
  padding: 0 20px;
}

body.mobile-sim-mode .series-view {
  margin: 0 auto 32px;
  padding: 12px;
}

.series-hero {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 26px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 22px;
}

.hero-layout {
  display: flex;
  gap: 26px;
  align-items: stretch;
}

.hero-cover-wrap {
  width: 210px;
  height: 276px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: #ffffff;
  flex-shrink: 0;
  position: relative;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

.hero-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
}

.hero-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}

.badge-green {
  background: var(--naver-green);
  color: var(--brand-dark);
}

.badge-gray {
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

.hero-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.hero-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.6px;
  color: var(--text-primary);
}

.hero-meta {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.hero-author {
  font-weight: 700;
  color: var(--text-primary);
}

.hero-synopsis {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 14px;
  word-break: keep-all;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.tag-chip {
  font-size: 12.5px;
  color: var(--text-secondary);
  background: var(--bg-subtle);
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
  white-space: nowrap;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

/* Episode List */
.episode-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.episode-list-header {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-page);
}

.ep-count-box {
  font-size: 15px;
}

.ep-total-label {
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 4px;
}

.ep-total-num {
  color: var(--text-primary);
  font-weight: 800;
}

.ep-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sort-btn {
  border: none;
  background: none;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--text-muted);
  cursor: pointer;
}

.sort-btn.active {
  color: var(--text-primary);
  font-weight: 800;
}

.divider {
  color: var(--border-color);
  font-size: 11px;
}

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

.episode-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background 0.14s ease;
}

.episode-item:last-child {
  border-bottom: none;
}

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

.episode-item.read-ep {
  background: var(--bg-page);
}

.ep-thumb-box {
  width: 136px;
  height: 81px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-subtle);
  flex-shrink: 0;
  position: relative;
}

.ep-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.25s ease;
}

.episode-item:hover .ep-thumb-img {
  transform: scale(1.04);
}

.ep-read-badge {
  position: absolute;
  bottom: 5px;
  right: 5px;
  background: var(--brand-dark);
  color: #ffffff;
  font-size: 10.5px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.ep-info {
  flex: 1;
  min-width: 0;
}

.ep-title-line {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.ep-main-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.episode-item.read-ep .ep-main-title {
  color: var(--text-secondary);
}

.ep-cut-badge {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--brand-dark);
  background: var(--naver-green);
  padding: 2px 7px;
  border-radius: 4px;
  flex-shrink: 0;
  white-space: nowrap;
}

.ep-substats {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  color: var(--text-muted);
}

.ep-rating {
  color: var(--text-primary);
  font-weight: 700;
}

.ep-right-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-delete-ep {
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
}

.btn-delete-ep:hover {
  background: var(--brand-dark);
  color: #ffffff;
  border-color: var(--brand-dark);
}

/* ==================== 2. NURI-TOON AI STUDIO VIEW ==================== */
.studio-view {
  max-width: 1040px;
  margin: 24px auto 64px;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.studio-header-card,
.studio-panel-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.studio-header-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.studio-main-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.studio-main-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.lore-characters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.lore-char-card {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px;
}

.lore-char-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 4px;
}

.lore-char-name {
  font-size: 14px;
  font-weight: 800;
  color: var(--text-primary);
}

.lore-char-role {
  font-size: 11px;
  font-weight: 700;
  color: var(--brand-dark);
  background: var(--naver-green);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.lore-char-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.45;
}

.studio-step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.studio-step-header-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.step-num-badge {
  background: var(--brand-dark);
  color: #ffffff;
  font-size: 11.5px;
  font-weight: 800;
  padding: 4px 9px;
  border-radius: 6px;
  white-space: nowrap;
}

.studio-step-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
}

.preset-plot-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  padding: 10px 14px;
  border-radius: 10px;
  margin-bottom: 16px;
}

.preset-bar-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-right: 4px;
}

.form-row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.studio-action-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  margin-top: 12px;
}

.studio-gen-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-primary);
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 8px;
}

.studio-workspace {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.studio-publish-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.studio-sub-help {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.studio-cuts-container {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.studio-cut-card {
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 20px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 18px;
  align-items: start;
}

.cut-editor-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cut-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.cut-num-badge {
  background: var(--brand-dark);
  color: #ffffff;
  font-size: 12.5px;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 6px;
}

.cut-preview-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.studio-canvas-wrap {
  width: 100%;
  max-width: 300px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.studio-cut-canvas {
  display: block;
  width: 100%;
  height: auto;
}

.canvas-caption {
  font-size: 11.5px;
  color: var(--text-muted);
  font-weight: 600;
}

.studio-bottom-publish {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

/* ==================== LONG-FORM STORY TREE (1 > 1-1, 1-2...) ==================== */
.premise-Save-row {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.premise-Save-row textarea {
  flex: 1;
}

.trunk-ai-gen-bar {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 14px;
  margin-top: 6px;
}

.trunk-ai-inputs {
  display: flex;
  gap: 8px;
  align-items: center;
}

.trunk-ai-inputs input[type="text"] {
  flex: 1;
  padding: 9px 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 13.5px;
  background: var(--bg-surface);
  color: var(--text-primary);
}

.trunk-ai-inputs select {
  padding: 9px 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-surface);
  color: var(--text-primary);
}

.story-tree-layout {
  display: grid;
  grid-template-columns: 310px 1fr;
  gap: 18px;
  align-items: start;
  margin-top: 8px;
}

.story-tree-sidebar {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.tree-sidebar-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-subtle);
  font-size: 13.5px;
  color: var(--text-primary);
}

.story-tree-list {
  padding: 10px;
  max-height: 680px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tree-trunk-group {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow: hidden;
}

.tree-trunk-item {
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
  transition: background 0.14s ease;
}

.tree-trunk-item:hover {
  background: var(--bg-page);
}

.tree-trunk-item.active {
  background: var(--brand-dark);
  color: #ffffff;
}

.tree-trunk-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.tree-code-pill {
  background: var(--naver-green);
  color: var(--brand-dark);
  font-size: 11.5px;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 5px;
  flex-shrink: 0;
  white-space: nowrap;
}

.tree-trunk-title {
  font-size: 13.5px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-sub-list {
  list-style: none;
  padding: 6px 8px 8px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--bg-page);
}

.tree-sub-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid transparent;
  transition: all 0.14s ease;
}

.tree-sub-item:hover {
  background: var(--bg-surface);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.tree-sub-item.active {
  background: var(--bg-surface);
  border-color: var(--brand-dark);
  color: var(--text-primary);
  font-weight: 700;
}

.tree-sub-left {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
}

.tree-sub-code {
  background: var(--brand-dark);
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  flex-shrink: 0;
  white-space: nowrap;
}

.tree-sub-item.active .tree-sub-code {
  background: var(--naver-green);
  color: var(--brand-dark);
}

.tree-sub-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-del-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 5px;
  border-radius: 4px;
  flex-shrink: 0;
  white-space: nowrap;
}

.tree-del-btn:hover {
  background: var(--brand-dark);
  color: #ffffff;
}

.story-detail-editor {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.selected-trunk-box,
.selected-substory-box {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
}

.selected-trunk-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.trunk-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.trunk-inline-title {
  flex: 1;
  padding: 7px 10px;
  border: 1px solid var(--border-color);
  border-radius: 7px;
  font-size: 14px;
  font-weight: 700;
  background: var(--bg-surface);
  color: var(--text-primary);
}

.trunk-btn-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.trunk-summary-textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 7px;
  font-size: 13px;
  font-family: inherit;
  background: var(--bg-surface);
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.substory-ai-expand-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

.substory-ai-expand-bar input[type="text"] {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 7px;
  font-size: 13px;
  background: var(--bg-surface);
  color: var(--text-primary);
}

.substory-ai-expand-bar select {
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 7px;
  font-size: 12.5px;
  font-weight: 600;
  background: var(--bg-surface);
  color: var(--text-primary);
}

.substory-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.substory-badge-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.substory-updated-text {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
}

.substory-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ai-refine-bar {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ai-refine-presets {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.ai-refine-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ai-refine-input-row input[type="text"] {
  flex: 1;
  padding: 8px 11px;
  border: 1px solid var(--border-color);
  border-radius: 7px;
  font-size: 13px;
  background: var(--bg-page);
  color: var(--text-primary);
}

.substory-content-textarea {
  width: 100%;
  line-height: 1.7;
  font-size: 14px;
  padding: 14px !important;
  background: var(--bg-surface) !important;
  color: var(--text-primary) !important;
}

/* ==================== 3. WEBTOON VIEWER ==================== */
.viewer-view {
  min-height: 100vh;
  background-color: var(--viewer-bg);
  color: #ffffff;
  position: relative;
}

.viewer-view.theme-light {
  --viewer-bg: #f8fafc;
}

.viewer-view.theme-sepia {
  --viewer-bg: #f1f5f9;
}

.reading-progress-track {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.12);
  z-index: 260;
}

.reading-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--naver-green);
  transition: width 0.08s linear;
}

.viewer-top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--brand-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 250;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.22s ease;
}

.viewer-top-bar.bars-hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

.viewer-bar-inner {
  max-width: 1020px;
  margin: 0 auto;
  height: 100%;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.viewer-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.viewer-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffffff;
  padding: 6px 11px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  flex-shrink: 0;
}

.viewer-back-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

.viewer-title-wrap {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.viewer-series-title {
  font-size: 11px;
  color: #cbd5e1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.viewer-ep-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.viewer-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.viewer-ep-select,
.viewer-width-select {
  background: var(--brand-dark);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  padding: 6px 9px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}

.viewer-icon-btn {
  background: var(--brand-dark);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.viewer-hint-toast {
  position: fixed;
  top: 68px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-dark);
  color: #ffffff;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 12px;
  z-index: 240;
  pointer-events: none;
  transition: opacity 0.4s ease;
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.viewer-hint-toast.fade-out {
  opacity: 0;
}

.viewer-stage {
  width: 100%;
  padding-top: 56px;
  padding-bottom: 90px;
  cursor: pointer;
}

.viewer-canvas {
  width: 100%;
  max-width: var(--viewer-max-width);
  margin: 0 auto;
  background: #ffffff;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.35);
  line-height: 0;
  font-size: 0;
}

.webtoon-cut {
  display: block;
  width: 100%;
  height: auto;
  margin: 0;
  padding: 0;
  border: 0;
  user-select: none;
  -webkit-user-drag: none;
}

.viewer-footer-card {
  width: 100%;
  max-width: var(--viewer-max-width);
  margin: 0 auto;
  background: var(--brand-dark);
  color: #ffffff;
  padding: 28px 22px 36px;
  cursor: default;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.author-note-box {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 20px;
}

.author-note-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--naver-green);
  margin-bottom: 4px;
}

.author-note-text {
  font-size: 14px;
  color: #f1f5f9;
}

.interact-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.interact-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #ffffff;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.15s ease;
}

.interact-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.interact-btn.liked {
  background: var(--naver-green);
  border-color: var(--naver-green);
  color: var(--brand-dark);
}

.next-ep-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--naver-green);
  color: var(--brand-dark);
  padding: 16px 20px;
  border-radius: 14px;
  cursor: pointer;
  margin-bottom: 18px;
  transition: transform 0.15s ease;
}

.next-ep-banner:hover {
  transform: translateY(-2px);
}

.next-ep-left {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.next-ep-thumb {
  width: 88px;
  height: 54px;
  border-radius: 7px;
  object-fit: cover;
  border: 1px solid rgba(29, 32, 38, 0.2);
  background: #ffffff;
  flex-shrink: 0;
}

.next-ep-label {
  font-size: 11.5px;
  font-weight: 700;
}

.next-ep-title {
  font-size: 16px;
  font-weight: 800;
}

.viewer-bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--brand-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 250;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.22s ease;
}

.viewer-bottom-bar.bars-hidden {
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
}

.viewer-bottom-inner {
  max-width: 820px;
  margin: 0 auto;
  height: 100%;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.viewer-nav-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffffff;
  padding: 8px 13px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  white-space: nowrap;
}

.viewer-nav-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.viewer-nav-next:not(:disabled) {
  background: var(--naver-green);
  color: var(--brand-dark);
  border-color: transparent;
}

.viewer-scrubber-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.viewer-scrubber {
  flex: 1;
  accent-color: var(--naver-green);
  cursor: pointer;
}

.viewer-cut-indicator {
  font-size: 12px;
  color: #cbd5e1;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ==================== MODALS & UPLOAD FORMS ==================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-card {
  background: var(--bg-surface);
  color: var(--text-primary);
  width: 100%;
  max-width: 540px;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
}

.modal-card.modal-lg {
  max-width: 680px;
}

.modal-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 800;
}

.modal-close {
  border: none;
  background: transparent;
  font-size: 18px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
}

.modal-body {
  padding: 20px 22px;
  overflow-y: auto;
}

.modal-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-page);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 10px;
}

.form-group label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
  padding: 9px 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: var(--bg-surface);
  color: var(--text-primary);
}

.upload-mode-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 8px 0 12px;
}

.mode-tab {
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-subtle);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--text-secondary);
  cursor: pointer;
}

.mode-tab.active {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  color: #ffffff;
}

.dropzone {
  border: 2px dashed #cbd5e1;
  border-radius: 12px;
  padding: 24px 16px;
  text-align: center;
  background: var(--bg-page);
  cursor: pointer;
  transition: all 0.15s ease;
}

.dropzone:hover,
.dropzone.drag-active {
  border-color: var(--naver-green);
}

.dropzone-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.dropzone-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.hidden-file-input {
  display: none;
}

.selected-files-summary {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.manuscript-preview-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 8px;
  margin-top: 10px;
  max-height: 185px;
  overflow-y: auto;
}

.preview-cut-item {
  border: 1px solid var(--border-color);
  border-radius: 7px;
  padding: 6px;
  background: #ffffff;
  font-size: 11px;
  text-align: center;
}

.preview-cut-num {
  display: inline-block;
  background: var(--brand-dark);
  color: #ffffff;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 4px;
  margin-bottom: 3px;
}

.preview-cut-name {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-secondary);
}

.selected-zip-name {
  margin-top: 8px;
  font-weight: 800;
  color: var(--text-primary);
  font-size: 13.5px;
}

.upload-progress-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  margin-top: 10px;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid var(--naver-green);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

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

.connect-guide-box {
  background: var(--bg-subtle);
  padding: 15px 16px;
  border-radius: 10px;
}

.connect-guide-box h4 {
  font-size: 14.5px;
  margin-bottom: 6px;
}

.connect-guide-box p {
  font-size: 13px;
  color: var(--text-secondary);
}

.lan-url-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.lan-url-item {
  background: var(--brand-dark);
  color: var(--naver-green);
  padding: 9px 12px;
  border-radius: 7px;
  font-family: monospace;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.guide-bullet-list {
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ==================== 스마트폰 & 태블릿 반응형 미디어 쿼리 ==================== */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 10px;
    height: 54px;
    gap: 6px;
  }

  .brand-logo-img {
    height: 20px;
  }

  .brand-badge,
  .series-tabs,
  #btnNavUpload {
    display: none !important;
  }

  .hide-mobile {
    display: none !important;
  }

  .header-actions {
    gap: 6px;
  }

  .header-actions .btn-sm {
    padding: 6px 9px;
    font-size: 12px;
  }

  .series-view,
  .studio-view {
    margin: 12px auto 40px;
    padding: 0 12px;
  }

  .series-hero,
  .studio-header-card,
  .studio-panel-card {
    padding: 16px;
  }

  .hero-layout {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
  }

  .hero-cover-wrap {
    width: 150px;
    height: 198px;
  }

  .hero-badges,
  .hero-title-row,
  .hero-meta,
  .hero-tags,
  .hero-actions {
    justify-content: center;
  }

  .hero-title {
    font-size: 21px;
  }

  .hero-actions .btn {
    padding: 8px 11px;
    font-size: 12.5px;
  }

  .episode-item {
    padding: 12px 14px;
    gap: 12px;
  }

  .ep-thumb-box {
    width: 100px;
    height: 60px;
  }

  .ep-main-title {
    font-size: 14px;
  }

  .viewer-width-select {
    display: none;
  }

  .viewer-canvas {
    max-width: 100% !important;
  }

  .form-row-2,
  .form-row-3,
  .studio-cut-card,
  .story-tree-layout {
    grid-template-columns: 1fr;
  }

  .trunk-ai-inputs,
  .substory-ai-expand-bar,
  .ai-refine-input-row,
  .selected-trunk-top,
  .premise-Save-row {
    flex-direction: column;
    align-items: stretch;
  }

  .studio-header-top {
    flex-direction: column;
  }
}

/* PC에서 스마트폰 시뮬레이터 모드 활성화 시 모바일 레이아웃 동일 적용 */
body.mobile-sim-mode .series-tabs,
body.mobile-sim-mode .hide-mobile {
  display: none !important;
}

body.mobile-sim-mode .hero-layout {
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
}

body.mobile-sim-mode .hero-cover-wrap {
  width: 140px;
  height: 184px;
}

body.mobile-sim-mode .hero-badges,
body.mobile-sim-mode .hero-title-row,
body.mobile-sim-mode .hero-meta,
body.mobile-sim-mode .hero-tags,
body.mobile-sim-mode .hero-actions {
  justify-content: center;
}

body.mobile-sim-mode .hero-title {
  font-size: 21px;
}

body.mobile-sim-mode .episode-item {
  padding: 11px 12px;
  gap: 10px;
}

body.mobile-sim-mode .ep-thumb-box {
  width: 96px;
  height: 58px;
}

body.mobile-sim-mode .viewer-width-select {
  display: none;
}

body.mobile-sim-mode .viewer-top-bar,
body.mobile-sim-mode .viewer-bottom-bar {
  max-width: 390px;
  left: 50%;
  transform: translateX(-50%);
}

body.mobile-sim-mode .viewer-top-bar.bars-hidden {
  transform: translate(-50%, -100%);
}

body.mobile-sim-mode .viewer-bottom-bar.bars-hidden {
  transform: translate(-50%, 100%);
}