:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #eef0ff;
  --color-bg: #f4f5f9;
  --color-panel: #ffffff;
  --color-border: #e3e5eb;
  --color-text: #1f2430;
  --color-text-muted: #6b7280;
  --color-text-faint: #9aa0ab;
  --color-danger: #e0434f;
  --color-danger-light: #fdecee;
  --color-success: #16a34a;
  --color-lock: #b45309;
  --color-lock-bg: #fef3e2;
  --radius-sm: 6px;
  --radius-md: 10px;
  --shadow-1: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-2: 0 4px 14px rgba(16, 24, 40, 0.10);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: "Pretendard", "Segoe UI", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

button {
  font-family: inherit;
}

/* ---------- Header ---------- */
.app-header {
  flex: 0 0 auto;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-1);
  z-index: 10;
}

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

.logo-badge {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 5px 9px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.header-left h1 {
  font-size: 17px;
  font-weight: 700;
  margin: 0;
  white-space: nowrap;
}

.header-subtitle {
  font-size: 12px;
  color: var(--color-text-faint);
  border-left: 1px solid var(--color-border);
  padding-left: 10px;
  margin-left: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.autosave-indicator {
  font-size: 12px;
  color: var(--color-text-faint);
  transition: color 0.2s ease;
}

.autosave-indicator.is-dirty {
  color: var(--color-lock);
}

.btn {
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}

.btn:active {
  transform: translateY(1px);
}

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

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-ghost:hover { background: var(--color-bg); }

/* ---------- Header action group (page-editor only) ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb-bar {
  flex: 0 0 auto;
  padding: 9px 20px;
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
  font-size: 12.5px;
}

.breadcrumb-item {
  padding: 3px 6px;
  border-radius: 4px;
  line-height: 1.3;
}

.breadcrumb-link {
  background: none;
  border: none;
  color: var(--color-primary);
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
}

.breadcrumb-link:hover {
  background: var(--color-primary-light);
}

.breadcrumb-current {
  color: var(--color-text-muted);
  font-weight: 600;
}

.breadcrumb-sep {
  color: var(--color-text-faint);
  font-size: 12px;
  padding: 0 1px;
}

/* ---------- View container (3 뎁스 전환) ---------- */
.view-container {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.view {
  flex: 1 1 auto;
  min-height: 0;
}

.view-content-list,
.view-lesson-list {
  overflow-y: auto;
  padding: 26px 32px 48px;
  background: var(--color-bg);
}

.view-page-editor {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

.view-toolbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.view-toolbar-title h2 {
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 4px;
}

.view-desc {
  font-size: 12.5px;
  color: var(--color-text-muted);
  margin: 0;
  max-width: 520px;
}

.view-toolbar .btn-back {
  margin-bottom: 8px;
}

.view-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.empty-state {
  font-size: 13px;
  color: var(--color-text-faint);
  padding: 32px 0;
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

/* ---------- View 1: content cards ---------- */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.content-card {
  position: relative;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  padding: 18px 18px 50px;
  cursor: pointer;
  transition: box-shadow 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}

.content-card:hover,
.content-card:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-2);
  outline: none;
}

.content-card:active {
  transform: translateY(1px);
}

.content-card-title {
  font-size: 15.5px;
  font-weight: 700;
  margin: 0 0 6px;
  padding-right: 50px;
}

.content-card-meta {
  font-size: 12px;
  color: var(--color-text-muted);
  margin: 0 0 10px;
}

.content-card-enter {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
}

.content-card-actions {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  gap: 2px;
}

/* ---------- View 2: lesson list ---------- */
.lesson-list {
  display: flex;
  flex-direction: column;
}

.lesson-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  padding: 14px 16px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.lesson-list-item:last-child {
  margin-bottom: 0;
}

.lesson-list-item:hover,
.lesson-list-item:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-2);
  outline: none;
}

.lesson-name-cell {
  font-size: 13.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.lesson-meta-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.lesson-count-cell {
  font-size: 13px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ---------- Body layout ---------- */
.app-body {
  flex: 1 1 auto;
  display: flex;
  min-height: 0;
}

.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.panel-header {
  padding: 16px 16px 10px;
  flex: 0 0 auto;
}

.panel-header h2 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin: 0;
}

.panel-header-hint {
  display: block;
  font-size: 11px;
  color: var(--color-text-faint);
  margin-top: 3px;
}

.btn-back {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.btn-back:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-back-compact {
  padding: 5px 10px;
  font-size: 11.5px;
  margin-bottom: 8px;
}

/* ---------- Left: page list panel ---------- */
.panel-pages {
  width: 300px;
  flex: 0 0 300px;
  background: var(--color-panel);
  border-right: 1px solid var(--color-border);
}

.page-list {
  list-style: none;
  margin: 0;
  padding: 4px 10px;
  overflow-y: auto;
  flex: 1 1 auto;
}

.page-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  margin-bottom: 4px;
  cursor: pointer;
  background: var(--color-panel);
}

.page-item:hover {
  background: #f9f9fc;
}

.page-item.is-selected {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.drag-handle {
  color: var(--color-text-faint);
  cursor: grab;
  font-size: 13px;
  letter-spacing: -2px;
  flex: 0 0 auto;
  user-select: none;
  padding: 0 2px;
}

.page-lock-icon {
  flex: 0 0 auto;
  font-size: 12px;
}

.page-title-wrap {
  flex: 1 1 auto;
  min-width: 0;
}

.page-title-text {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-item-index {
  display: block;
  font-size: 11px;
  color: var(--color-text-faint);
  font-weight: 400;
}

.page-title-input {
  width: 100%;
  font-size: 13.5px;
  font-weight: 600;
  font-family: inherit;
  border: 1px solid var(--color-primary);
  border-radius: 4px;
  padding: 3px 6px;
  outline: none;
  color: var(--color-text);
  background: #fff;
}

.hidden { display: none !important; }

.icon-btn {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: none;
  background: transparent;
  color: var(--color-text-faint);
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.icon-btn:hover {
  background: rgba(0,0,0,0.06);
  color: var(--color-text);
}

.delete-btn:hover {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.order-btns {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: 0 0 auto;
}

.order-btns .icon-btn {
  width: 16px;
  height: 12px;
  font-size: 8px;
}

.btn-add-page {
  margin: 10px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px dashed var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 10px;
  text-align: center;
  font-size: 13px;
}
.btn-add-page:hover { background: #e2e2fb; }

.plus-icon { font-weight: 700; margin-right: 2px; }

/* ---------- Center: canvas panel ---------- */
.panel-canvas {
  flex: 1 1 auto;
  background: var(--color-bg);
  overflow-y: auto;
  align-items: center;
  padding: 28px 24px 60px;
}

.canvas-toolbar {
  width: 100%;
  max-width: 720px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.canvas-page-index {
  font-size: 12.5px;
  color: var(--color-text-muted);
}

.canvas-lock-badge {
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  display: none;
}

.canvas-lock-badge.show-locked {
  display: inline-block;
  background: var(--color-lock-bg);
  color: var(--color-lock);
}

.canvas-lock-badge.show-unlocked {
  display: inline-block;
  background: #eef2f7;
  color: var(--color-text-muted);
}

.canvas-page {
  width: 100%;
  max-width: 720px;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  padding: 32px 36px;
}

.canvas-field-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-faint);
  margin-bottom: 8px;
}

.canvas-title-input {
  width: 100%;
  font-size: 26px;
  font-weight: 700;
  font-family: inherit;
  color: var(--color-text);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  margin: 0 0 22px -8px;
  outline: none;
  background: transparent;
}

.canvas-title-input:hover {
  border-color: var(--color-border);
}

.canvas-title-input:focus {
  border-color: var(--color-primary);
  background: #fff;
}

.canvas-blocks {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

.canvas-block {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px;
  background: #fbfbfd;
}

.canvas-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.canvas-block-type {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.canvas-block-textarea {
  width: 100%;
  min-height: 64px;
  resize: vertical;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 10px;
  outline: none;
}

.canvas-block-textarea:focus {
  border-color: var(--color-primary);
}

.btn-add-block {
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  font-size: 13px;
}
.btn-add-block:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.canvas-empty-hint {
  font-size: 13px;
  color: var(--color-text-faint);
  padding: 20px 0;
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
}

/* ---------- Right: props panel ---------- */
.panel-props {
  width: 320px;
  flex: 0 0 320px;
  background: var(--color-panel);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
}

.prop-section {
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
}

.prop-section-note {
  border-bottom: none;
}

.prop-section h3 {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-muted);
  margin: 0 0 12px;
}

.prop-field {
  margin-bottom: 10px;
}

.prop-field label {
  display: block;
  font-size: 11.5px;
  color: var(--color-text-faint);
  margin-bottom: 3px;
}

.prop-static {
  font-size: 13px;
  color: var(--color-text);
  background: var(--color-bg);
  border-radius: 4px;
  padding: 6px 9px;
  font-family: "Consolas", monospace;
}

.prop-row {
  margin-bottom: 14px;
}

.prop-row:last-child { margin-bottom: 0; }

.toggle-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.toggle-label {
  font-size: 13.5px;
  font-weight: 600;
}

.prop-desc {
  font-size: 11.5px;
  color: var(--color-text-faint);
  margin: 4px 0 0;
  line-height: 1.5;
}

.prop-desc-sub {
  margin-left: 24px;
}

.toggle-switch {
  flex: 0 0 auto;
  width: 42px;
  height: 24px;
  border-radius: 999px;
  border: none;
  background: #d1d5db;
  position: relative;
  cursor: pointer;
  padding: 0;
  transition: background 0.18s ease;
}

.toggle-switch.is-on {
  background: var(--color-primary);
}

.toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.25);
  transition: transform 0.18s ease;
}

.toggle-switch.is-on .toggle-knob {
  transform: translateX(18px);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"]:disabled {
  cursor: not-allowed;
}

/* ---------- Right props panel: form controls ---------- */
.req-label {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.req-mark {
  color: var(--color-danger);
  font-weight: 700;
}

.prop-input,
.prop-textarea {
  width: 100%;
  font-family: inherit;
  font-size: 13px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 5px;
  padding: 7px 9px;
  outline: none;
  background: #fff;
}

.prop-input:focus,
.prop-textarea:focus {
  border-color: var(--color-primary);
}

.prop-textarea {
  resize: vertical;
  min-height: 60px;
}

.prop-hint {
  font-size: 11px;
  color: var(--color-text-faint);
  margin: 4px 0 0;
  line-height: 1.4;
}

.prop-input-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.prop-input-row .prop-input {
  flex: 1 1 auto;
  min-width: 0;
}

.btn-mini {
  flex: 0 0 auto;
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  border-radius: 5px;
  padding: 6px 8px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

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

.prop-sample-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.btn-sample {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

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

.radio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 10px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  cursor: pointer;
}

.radio-label input[type="radio"] {
  width: 14px;
  height: 14px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.prop-duration-row {
  display: flex;
  gap: 12px;
}

.prop-duration-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.prop-input-narrow {
  width: 70px;
}

.prop-duration-suffix {
  font-size: 12.5px;
  color: var(--color-text-muted);
}

/* ---------- Right-most: live preview panel ---------- */
.panel-preview {
  width: 360px;
  flex: 0 0 360px;
  background: #16181f;
  color: #f2f3f7;
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
}

.panel-preview .panel-header h2 {
  color: #cfd2dd;
}

.panel-preview .panel-header-hint {
  color: #7b7f8f;
}

.preview-body {
  padding: 4px 16px 24px;
}

.preview-topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.preview-type-badge {
  flex: 0 0 auto;
  background: var(--color-primary);
  color: #fff;
  font-size: 10.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
}

.preview-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.preview-media-wrap {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: 6px;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

.preview-media-wrap.pulse-highlight {
  animation: preview-pulse 0.9s ease;
}

@keyframes preview-pulse {
  0% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.9); }
  60% { box-shadow: 0 0 0 8px rgba(79, 70, 229, 0); }
  100% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0); }
}

.preview-nav-arrow {
  flex: 0 0 auto;
  width: 26px;
  border: none;
  background: rgba(255, 255, 255, 0.06);
  color: #d7d9e3;
  cursor: pointer;
  font-size: 12px;
  border-radius: 4px;
}

.preview-nav-arrow:hover {
  background: rgba(255, 255, 255, 0.14);
}

.preview-nav-arrow.is-locked {
  color: #6a6d78;
  cursor: not-allowed;
  background: rgba(255, 255, 255, 0.03);
}

.preview-nav-arrow.is-locked:hover {
  background: rgba(255, 255, 255, 0.03);
}

.preview-media {
  flex: 1 1 auto;
  min-width: 0;
  aspect-ratio: 16 / 9;
  background: #0a0b10;
  border: 1px solid #2a2c36;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  position: relative;
  text-align: center;
  padding: 10px;
}

.preview-media-icon {
  font-size: 22px;
  color: #5a5d6b;
}

.preview-media-path {
  font-size: 11px;
  color: #9298ab;
  word-break: break-all;
  font-family: "Consolas", monospace;
}

.preview-media-path.is-empty {
  color: #565968;
  font-style: italic;
}

.preview-caption-overlay {
  position: absolute;
  left: 32px;
  right: 32px;
  bottom: 10px;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 4px;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.preview-play-btn {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-time {
  flex: 0 0 auto;
  font-size: 11px;
  color: #b6b9c6;
  font-family: "Consolas", monospace;
}

.preview-progress-track {
  flex: 1 1 auto;
  height: 5px;
  border-radius: 999px;
  background: #2c2e39;
  overflow: hidden;
  min-width: 0;
}

.preview-progress-fill {
  width: 32%;
  height: 100%;
  background: var(--color-primary);
}

.preview-speed-btn {
  flex: 0 0 auto;
  background: #2a2c36;
  border: none;
  color: #d7d9e3;
  font-size: 11px;
  font-weight: 600;
  padding: 5px 8px;
  border-radius: 5px;
  cursor: pointer;
}

.preview-lock-badge {
  margin-top: 10px;
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
}

.preview-lock-badge.show-locked {
  background: var(--color-lock-bg);
  color: var(--color-lock);
}

.preview-lock-badge.show-unlocked {
  background: rgba(255, 255, 255, 0.08);
  color: #b6b9c6;
}

.preview-audio-track {
  margin-top: 10px;
  font-size: 12px;
  color: #cfd2dd;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 6px;
  padding: 7px 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-description {
  margin-top: 12px;
  font-size: 12px;
  color: #9298ab;
  line-height: 1.6;
}

/* ---------- View: player settings (부속 화면, 자체 헤더+사이드바) ---------- */
.view-player-settings {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
  background: var(--color-panel);
}

.player-settings-topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  box-shadow: var(--shadow-1);
}

.player-settings-close {
  flex: 0 0 auto;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 4px;
  border-radius: 4px;
}

.player-settings-close:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.player-settings-breadcrumb {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 12.5px;
  color: var(--color-text-muted);
  font-weight: 600;
}

.player-settings-body {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
}

.player-settings-sidebar {
  width: 220px;
  flex: 0 0 220px;
  border-right: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 10px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.player-settings-tab {
  text-align: left;
  border: none;
  background: transparent;
  color: var(--color-text);
  font-size: 13.5px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.player-settings-tab:hover {
  background: var(--color-panel);
}

.player-settings-tab.is-active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
}

.player-settings-content {
  flex: 1 1 auto;
  min-width: 0;
  overflow-y: auto;
  padding: 28px 32px;
}

.player-settings-content-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 20px;
}

.player-settings-form {
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.player-settings-wip-hint {
  margin-top: 10px;
  font-size: 12px;
  color: var(--color-text-faint);
}

.file-upload-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-file-select {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.file-input-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.file-name-text {
  font-size: 12.5px;
  color: var(--color-text-faint);
}

/* ---------- Toast ---------- */
.toast-container {
  position: fixed;
  bottom: 22px;
  right: 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
}

.toast {
  background: #1f2430;
  color: #fff;
  font-size: 13px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-2);
  opacity: 0;
  transform: translateY(6px);
  animation: toast-in 0.18s ease forwards;
}

.toast.toast-fading {
  animation: toast-out 0.25s ease forwards;
}

@keyframes toast-in {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
  to { opacity: 0; transform: translateY(-6px); }
}