:root {
  --ink: #17352d;
  --muted: #64736e;
  --paper: #fffdf7;
  --green: #0f765d;
  --green-dark: #095744;
  --green-soft: #e3f2eb;
  --cream: #f4eddd;
  --yellow: #f1c453;
  --coral: #e96f58;
  --line: #d7e1da;
  --white: #fff;
  --shadow: 0 18px 46px rgba(35, 57, 48, 0.11);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(23, 53, 45, 0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 53, 45, 0.024) 1px, transparent 1px),
    #f7f4ea;
  background-size: 28px 28px;
  font-family: "Gowun Dodum", "Malgun Gothic", sans-serif;
}

button, input, select, textarea { font: inherit; }
button, label { -webkit-tap-highlight-color: transparent; }

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
label:has(input:focus-visible) {
  outline: 4px solid rgba(241, 196, 83, 0.9);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 12px 16px;
  border-radius: 12px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-180%);
}

.skip-link:focus { transform: translateY(0); }

.app-shell {
  width: min(1720px, calc(100% - 28px));
  margin: 0 auto;
  padding: 10px 0 48px;
}

.project-bar {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto auto auto;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.book-title-field,
.detail-field,
.text-toolbar label {
  display: grid;
  gap: 6px;
}

.book-title-field span,
.detail-field span,
.text-toolbar label > span,
.tool-label {
  color: #476057;
  font-size: 12px;
  font-weight: 800;
}

.book-title-field input,
.detail-field input[type="text"],
.detail-field textarea,
.text-toolbar select,
.text-toolbar input[type="number"] {
  min-height: 44px;
  width: 100%;
  border: 1px solid #bccdc5;
  border-radius: 11px;
  color: var(--ink);
  background: #fff;
}

.book-title-field input {
  max-width: none;
  min-height: 40px;
  padding: 0 11px;
  font-size: 16px;
  font-weight: 700;
}

.book-title-field {
  min-width: 0;
  grid-template-columns: auto minmax(120px, 1fr);
  align-items: center;
  gap: 8px;
}

.save-state {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #4f645c;
  font-size: 13px;
  white-space: nowrap;
}

.save-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px var(--green-soft);
}

.save-state.saving .save-dot { background: var(--yellow); }
.save-state.error .save-dot { background: var(--coral); }

.tool-buttons,
.page-actions,
.reading-actions,
.toggle-group,
.align-group,
.size-stepper {
  display: flex;
  align-items: center;
  gap: 7px;
}

.revision-strip {
  position: relative;
}

.compact-menu { position: relative; }
.compact-menu > summary {
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 11px;
  border: 1px solid #c6d5ce;
  border-radius: 11px;
  color: #315047;
  background: #fff;
  cursor: pointer;
  font-size: 12px;
  font-weight: 800;
  list-style: none;
}

.compact-menu > summary::-webkit-details-marker { display: none; }
.compact-menu[open] > summary { border-color: var(--green); background: var(--green-soft); }

.revision-count {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding: 0 8px;
  border-radius: 999px;
  color: var(--green-dark);
  background: var(--green-soft);
  font-size: 12px;
  font-weight: 800;
}

.revision-content {
  position: absolute;
  z-index: 80;
  top: calc(100% + 10px);
  right: 0;
  width: min(560px, calc(100vw - 32px));
  max-height: min(70vh, 680px);
  overflow: auto;
  padding: 16px;
  border: 1px solid #cbd9d2;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 20px 48px rgba(23, 53, 45, .18);
}

.revision-intro { margin: 0 0 10px; color: var(--muted); font-size: 12px; }

.revision-create {
  display: flex;
  align-items: end;
  gap: 9px;
  padding-top: 0;
}

.revision-create label {
  min-width: 220px;
  display: grid;
  gap: 5px;
}

.revision-create label span { color: #476057; font-size: 12px; font-weight: 800; }
.revision-create select, .revision-create button { min-height: 43px; border: 1px solid #b8cac1; border-radius: 11px; background: #fff; }
.revision-create select { padding: 0 10px; }
.revision-create button { padding: 0 15px; color: #fff; border-color: var(--green); background: var(--green); cursor: pointer; font-weight: 700; }

.revision-warning {
  margin: 11px 0;
  color: #78672e;
  font-size: 11px;
  line-height: 1.6;
}

.revision-status { min-height: 20px; color: var(--green-dark); font-size: 12px; }
.revision-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; }

.revision-card {
  display: grid;
  gap: 7px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: #fafbf8;
}

.revision-card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.revision-badge { display: inline-flex; min-height: 27px; align-items: center; padding: 0 9px; border-radius: 999px; color: #315047; background: #e7efea; font-size: 11px; font-weight: 800; }
.revision-badge.submission { color: #86591c; background: #fff0c8; }
.revision-badge.teacher-edit { color: #285c86; background: #deeffb; }
.revision-badge.final { color: #fff; background: var(--green); }
.revision-card time { color: var(--muted); font-size: 10px; }
.revision-card p { min-height: 20px; margin: 0; color: var(--muted); font-size: 11px; }
.revision-card-actions { display: flex; gap: 6px; }
.revision-card-actions button { min-height: 36px; flex: 1; border: 1px solid #c4d0ca; border-radius: 9px; color: #315047; background: #fff; cursor: pointer; font-size: 11px; font-weight: 700; }
.revision-card-actions .teacher-start-button { color: #285c86; border-color: #a9cbe4; background: #eff8ff; }
.revision-empty { grid-column: 1 / -1; padding: 15px; border: 1px dashed #bdcac4; border-radius: 12px; color: var(--muted); text-align: center; font-size: 12px; }

.book-file-content {
  position: absolute;
  z-index: 80;
  top: calc(100% + 10px);
  right: 0;
  width: 210px;
  display: grid;
  gap: 7px;
  padding: 10px;
  border: 1px solid #cbd9d2;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 18px 42px rgba(23, 53, 45, .16);
}

.book-file-content .soft-button { width: 100%; }

.soft-button,
.main-tool-button,
.page-actions button,
.reading-actions button,
.text-toolbar button,
.round-add-button {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}

.soft-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  white-space: nowrap;
}

.file-button input,
.image-tool-button input { display: none; }

.editor-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.page-panel,
.work-panel,
.detail-panel {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow);
}

.page-panel,
.detail-panel {
  position: sticky;
  top: 12px;
  padding: 18px;
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.panel-kicker {
  display: block;
  margin-bottom: 3px;
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.panel-heading h2,
.reading-heading h2 {
  margin: 0;
  font-family: "Jua", "Malgun Gothic", sans-serif;
  font-size: 25px;
  font-weight: 400;
}

.round-add-button {
  width: 46px;
  min-width: 46px;
  padding: 0;
  border-color: var(--green);
  color: #fff;
  background: var(--green);
  box-shadow: 0 5px 0 var(--green-dark);
  font-size: 25px;
}

.page-list {
  max-height: 62vh;
  display: grid;
  gap: 8px;
  overflow: auto;
  margin: 0;
  padding: 0 4px 0 0;
  list-style: none;
}

.page-list button {
  width: 100%;
  display: grid;
  grid-template-columns: 38px 1fr;
  align-items: center;
  gap: 10px;
  padding: 9px;
  border: 1px solid transparent;
  border-radius: 13px;
  color: var(--ink);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.page-list button:hover { background: #f3f7f4; }

.page-list button.active {
  border-color: #8fc2b1;
  background: var(--green-soft);
}

.page-thumb {
  aspect-ratio: 0.707;
  display: grid;
  place-items: center;
  border: 1px solid #b9c6c0;
  border-radius: 5px;
  color: #597068;
  background: #fff;
  font-size: 11px;
  box-shadow: 2px 3px 0 rgba(23, 53, 45, 0.08);
}

.page-name strong,
.page-name small { display: block; }
.page-name strong { font-size: 13px; }
.page-name small { margin-top: 2px; color: var(--muted); font-size: 11px; }

.cover-list-item,
.spread-list-item { min-width: 0; }

.cover-list-item .page-list-button { width: 100%; }

.spread-list-item {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 7px;
  align-items: stretch;
  padding: 5px;
  border: 1px solid #d3ddd8;
  border-radius: 13px;
  background: #f8faf8;
  transition: opacity .15s ease, transform .15s ease, box-shadow .15s ease;
}

.spread-list-pages { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 5px; }
.spread-list-pages .page-list-button { min-width: 0; grid-template-columns: 30px minmax(0, 1fr); padding: 6px; }
.spread-list-pages .page-name { min-width: 0; }
.spread-list-pages .page-name strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; }
.spread-list-pages .page-name small { font-size: 9px; }

.page-list .spread-drag-handle {
  width: 38px;
  min-height: 58px;
  display: grid;
  grid-template-columns: 1fr;
  place-items: center;
  padding: 0;
  border: 1px dashed #9db4aa;
  border-radius: 10px;
  color: #426158;
  background: #edf4f0;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.spread-drag-handle span { font-size: 23px; line-height: 1; transform: rotate(90deg); }
.spread-drag-handle:active { cursor: grabbing; }
.spread-list-item.drag-pending { box-shadow: 0 0 0 3px rgba(15, 118, 93, .11); }
.spread-list-item.dragging { z-index: 4; opacity: .48; transform: scale(.98); }
.spread-list-item.drop-before::before,
.spread-list-item.drop-after::after {
  position: absolute;
  right: 2px;
  left: 2px;
  height: 4px;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(15, 118, 93, .15);
  content: "";
}
.spread-list-item.drop-before::before { top: -7px; }
.spread-list-item.drop-after::after { bottom: -7px; }

.page-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 14px;
}

.page-actions button { padding: 0 6px; font-size: 12px; }
.danger-button, .wide-danger-button { color: #a33c2f !important; border-color: #f0c5bd !important; }
.page-action-hint { min-height: 36px; margin: 9px 2px 0; color: var(--muted); font-size: 11px; line-height: 1.5; }

.confirm-dialog {
  width: min(calc(100% - 28px), 470px);
  padding: 0;
  border: 0;
  border-radius: 24px;
  color: var(--ink);
  background: transparent;
  box-shadow: 0 26px 70px rgba(23, 53, 45, .28);
}

.confirm-dialog::backdrop { background: rgba(23, 43, 37, .55); backdrop-filter: blur(3px); }

.confirm-dialog-card {
  padding: 28px;
  border: 2px solid #f0c5bd;
  border-radius: 24px;
  background: #fffdf9;
}

.confirm-dialog-kicker { color: #a33c2f; font-size: 12px; font-weight: 900; letter-spacing: .04em; }
.confirm-dialog h2 { margin: 7px 0 14px; font-family: "Jua", sans-serif; font-size: 27px; font-weight: 400; }
.confirm-dialog p { margin: 0; color: #435b53; font-size: 15px; line-height: 1.7; }
.confirm-dialog-note { margin-top: 9px !important; padding: 11px 13px; border-radius: 12px; background: #f4f7f4; font-size: 13px !important; }
.confirm-dialog-actions { display: grid; grid-template-columns: 1fr 1.25fr; gap: 9px; margin-top: 22px; }
.confirm-dialog-actions button { min-height: 48px; }
.confirm-delete-button { border: 1px solid #9f382c; border-radius: 12px; color: #fff; background: #b64637; cursor: pointer; font-weight: 900; }
.confirm-delete-button:hover { background: #99382d; }

.work-panel { overflow: hidden; }

.tool-shelf {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: #fbfcf8;
}

.tool-shelf > div:first-child {
  flex: 1 1 auto;
  min-width: 0;
}

.tool-buttons {
  flex-wrap: wrap;
  margin-top: 7px;
}

.main-tool-button {
  min-width: 112px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 14px;
}

.main-tool-button span {
  font-family: "Jua", sans-serif;
  color: var(--green);
  font-size: 20px;
}

.swap-spread-button { min-width: 170px; }
.swap-spread-button:disabled { opacity: .42; cursor: not-allowed; }

.history-tool-button {
  min-width: 104px;
  color: #36524a;
  background: #f8fbf9;
}

.history-tool-button:disabled {
  opacity: .42;
  cursor: not-allowed;
}

.canvas-guide {
  flex: 0 0 180px;
  min-width: 180px;
  text-align: right;
}
.canvas-guide strong, .canvas-guide span { display: block; }
.canvas-guide span { margin-top: 4px; color: var(--muted); font-size: 12px; }

.text-toolbar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 9px;
  align-items: end;
  padding: 13px 16px;
  border-bottom: 1px solid #b9d9ce;
  background: var(--green-soft);
}

.text-toolbar[hidden] { display: none; }
.text-toolbar.inactive { background: #f4f6f4; }
.text-toolbar.inactive label > span,
.text-toolbar.inactive .toggle-group,
.text-toolbar.inactive .align-group { opacity: .62; }
.text-toolbar :disabled { cursor: not-allowed; opacity: .52; }
.text-toolbar select { padding: 0 9px; }
.color-with-clear { display: flex; align-items: center; gap: 6px; }
.color-with-clear input { flex: 0 0 44px; width: 44px; height: 44px; padding: 3px; border: 1px solid var(--line); border-radius: 10px; }
.color-with-clear button { min-height: 44px; padding: 0 9px; white-space: nowrap; }
.overlay-text-button:not([hidden]) { border-color: #276749; background: #f0fff4; }
.overlay-text-button[hidden] { display: none; }
.overlay-text-button { white-space: nowrap; }

.compact-editor-menu { position: relative; }
.compact-editor-menu > summary {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}
.compact-editor-menu > summary::-webkit-details-marker { display: none; }
.compact-editor-menu > summary::after { content: '⌄'; margin-left: 7px; color: var(--green); }
.compact-editor-menu[open] > summary { border-color: var(--green); box-shadow: 0 0 0 3px rgba(15, 118, 93, .12); }
.compact-editor-menu-content,
.element-details-menu > #elementDetails,
.page-style-menu > .page-detail-box {
  position: absolute;
  z-index: 40;
  top: calc(100% + 7px);
  left: 0;
  width: min(320px, calc(100vw - 30px));
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 18px 45px rgba(35, 58, 50, .18);
}
.compact-editor-menu-content { display: grid; gap: 8px; }
.compact-editor-menu-content .main-tool-button { width: 100%; min-width: 0; }
.add-content-menu .image-tool-button { min-height: 44px; }

.compact-editor-controls {
  display: flex;
  gap: 8px;
  padding: 9px 16px;
  border-bottom: 1px solid var(--line);
  background: #fbfcf8;
}
.compact-editor-controls [hidden] { display: none; }
.page-style-menu > .page-detail-box { margin: 0; }
.detail-panel { display: none; }

.print-settings-dialog {
  width: min(920px, calc(100% - 30px));
  max-width: none;
  max-height: calc(100dvh - 30px);
  padding: 0;
  border: 0;
  border-radius: 22px;
  background: transparent;
}
.print-settings-dialog::backdrop { background: rgba(20, 38, 32, .58); backdrop-filter: blur(3px); }
.print-settings-dialog-card {
  max-height: calc(100dvh - 30px);
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fffdf8;
  box-shadow: 0 28px 80px rgba(16, 40, 32, .3);
}
.print-settings-dialog-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; }
.print-settings-dialog-heading span { color: var(--green); font-size: 12px; font-weight: 900; }
.print-settings-dialog-heading h2 { margin: 5px 0 0; font-size: clamp(22px, 3vw, 34px); }
.print-settings-dialog-close { min-height: 44px; padding: 0 16px; border: 1px solid var(--line); border-radius: 12px; background: #fff; cursor: pointer; font-weight: 800; }
.print-size-guide { margin: 18px 0; padding: 14px 16px; border-radius: 15px; background: var(--green-soft); }
.print-size-guide p { margin: 6px 0 0; color: var(--muted); line-height: 1.55; }
.print-settings-dialog .print-settings { margin: 0; }
.print-settings-dialog .print-settings > summary { display: none; }
.size-stepper input { min-width: 58px; text-align: center; }
.size-stepper button { flex: 0 0 42px; padding: 0; font-size: 20px; }
.toggle-group button, .align-group button { padding: 0 10px; font-size: 12px; }

.toggle-group button[aria-pressed="true"],
.align-group button[aria-pressed="true"] {
  color: #fff;
  border-color: var(--green);
  background: var(--green);
  box-shadow: 0 3px 0 var(--green-dark);
}

.color-field input {
  width: 52px;
  height: 44px;
  padding: 4px;
  border: 1px solid #b9c9c2;
  border-radius: 11px;
  background: #fff;
}

.canvas-area {
  min-height: 620px;
  display: grid;
  place-items: center;
  overflow: auto;
  padding: 30px 24px;
  background:
    linear-gradient(45deg, rgba(23, 53, 45, 0.025) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(23, 53, 45, 0.025) 25%, transparent 25%),
    #e9eee9;
  background-size: 24px 24px;
}

.spread-canvas {
  position: relative;
  width: min(100%, 940px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 8px;
  align-items: start;
}

.page-edit-slot {
  min-width: 0;
  padding: 8px;
  border: 3px solid transparent;
  border-radius: 18px;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.page-edit-slot.active {
  border-color: var(--green);
  background: rgba(227, 242, 235, .88);
  box-shadow: 0 0 0 4px rgba(15, 118, 93, .12);
}

.page-edit-slot.empty { visibility: hidden; }

.page-side-picker {
  min-height: 42px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
  padding: 0 12px;
  border: 1px solid #b8c8c1;
  border-radius: 12px;
  color: #38584f;
  background: rgba(255, 255, 255, .92);
  cursor: pointer;
}

.page-side-picker span { font-size: 12px; font-weight: 800; }
.page-side-picker strong { font-size: 13px; }
.page-side-picker[aria-pressed="true"] { color: #fff; border-color: var(--green); background: var(--green); box-shadow: 0 3px 0 var(--green-dark); }
.edit-book-spine { position: absolute; z-index: 8; top: 62px; bottom: 12px; left: 50%; width: 12px; pointer-events: none; transform: translateX(-50%); background: linear-gradient(90deg, rgba(23,53,45,.18), rgba(255,255,255,.75) 48%, rgba(23,53,45,.2)); filter: blur(1px); opacity: .75; }
.spread-canvas[data-opening-kind="front-cover"] .edit-book-spine,
.spread-canvas[data-opening-kind="back-cover"] .edit-book-spine { display: none; }

.page-canvas {
  position: relative;
  width: 100%;
  aspect-ratio: 210 / 297;
  overflow: hidden;
  border: 1px solid #bac4bf;
  background: #fff;
  box-shadow: 0 20px 45px rgba(23, 53, 45, 0.2), 8px 8px 0 rgba(23, 53, 45, 0.06);
  touch-action: none;
}

.inactive-canvas { cursor: pointer; filter: saturate(.78) brightness(.97); }
.companion-object { pointer-events: none; }

.canvas-object {
  position: absolute;
  min-width: 24px;
  min-height: 24px;
  overflow: hidden;
  border: 2px solid transparent;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.canvas-object:active { cursor: grabbing; }
.canvas-object.selected { border-color: var(--green); box-shadow: 0 0 0 3px rgba(15, 118, 93, 0.16); }
.canvas-object.locked { cursor: default; }

.text-object {
  display: block;
  padding: 0;
}

.inline-text-editor {
  width: 100%;
  height: 100%;
  padding: 5px;
  overflow: auto;
  outline: 0;
  cursor: text;
  user-select: text;
  white-space: pre-wrap;
  word-break: break-word;
}

.inline-text-editor[contenteditable="true"]:focus {
  background: rgba(255, 255, 255, .45);
}

.object-move-handle {
  position: absolute;
  z-index: 3;
  top: 4px;
  right: 4px;
  min-height: 28px;
  padding: 4px 8px;
  border: 1px solid var(--green);
  border-radius: 999px;
  color: #fff;
  background: var(--green);
  cursor: grab;
  font-size: 11px;
  font-weight: 800;
  opacity: 0;
}

.text-object.selected .object-move-handle,
.text-object:focus-within .object-move-handle { opacity: 1; }
.object-move-handle:active { cursor: grabbing; }

.image-object img { width: 100%; height: 100%; display: block; object-fit: contain; pointer-events: none; }

.image-page-prompt {
  position: absolute;
  z-index: 2;
  inset: 18% 12%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 20px;
  border: 2px dashed #9cbdb2;
  border-radius: 18px;
  color: #31584c;
  background: rgba(246, 252, 248, .94);
  text-align: center;
}

.image-page-prompt strong { font-size: 15px; }
.image-page-prompt p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.image-page-prompt button {
  min-height: 38px;
  padding: 8px 14px;
  border: 1px solid var(--green);
  border-radius: 999px;
  color: #fff;
  background: var(--green);
  cursor: pointer;
  font-weight: 800;
}

.empty-detail {
  padding: 18px 14px;
  border: 1px dashed #b9c9c2;
  border-radius: 15px;
  background: #f8faf8;
  text-align: center;
}

.empty-detail p,
.print-notice p { margin: 7px 0 0; color: var(--muted); font-size: 13px; line-height: 1.65; }

.detail-field { margin-bottom: 13px; }
.detail-field textarea, .detail-field input[type="text"] { padding: 10px 11px; resize: vertical; }
.detail-field input[type="range"] { width: 100%; accent-color: var(--green); }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 12px; }

.wide-danger-button {
  min-height: 44px;
  width: 100%;
  border: 1px solid;
  border-radius: 12px;
  background: #fff8f6;
  cursor: pointer;
  font-weight: 700;
}

.page-detail-box,
.print-notice {
  margin-top: 18px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fafbf8;
}

.page-detail-box h3 { margin: 0 0 12px; font-size: 15px; }
.color-row { grid-template-columns: 1fr auto; align-items: center; margin: 0; }
.color-row input { width: 52px; height: 40px; border: 0; background: transparent; }
.print-notice { border-color: #ead8a3; background: #fff9e8; }
.print-notice strong { font-size: 13px; }

.print-settings {
  margin-top: 18px;
  padding: 0;
  border: 1px solid #dbc98d;
  border-radius: 17px;
  background: #fffaf0;
  overflow: hidden;
}

.print-settings summary {
  padding: 14px 15px;
  color: #5d4a16;
  background: #fff2c9;
  cursor: pointer;
  font-weight: 800;
}

.print-help {
  margin: 14px 15px 10px;
  color: #6f6449;
  font-size: 12px;
  line-height: 1.6;
}

.print-grid,
.offset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 10px;
  padding: 0 15px;
}

.print-settings select,
.print-settings input[type="text"],
.print-settings input[type="number"] {
  min-height: 42px;
  width: 100%;
  padding: 0 9px;
  border: 1px solid #cabf9d;
  border-radius: 10px;
  background: #fff;
}

.calibration-box {
  margin: 5px 15px 14px;
  padding: 12px;
  border: 1px dashed #c7b978;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.72);
}

.print-small-actions,
.print-main-actions {
  display: flex;
  gap: 7px;
}

.print-small-actions button,
.print-main-actions button {
  min-height: 42px;
  flex: 1;
  border: 1px solid #c8bd98;
  border-radius: 11px;
  color: #574819;
  background: #fff;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
}

.print-main-actions { padding: 0 15px 15px; }
.print-main-actions .primary-print-button { color: #fff; border-color: var(--green); background: var(--green); box-shadow: 0 4px 0 var(--green-dark); }
.print-status { min-height: 22px; padding: 0 15px 8px; color: #6f6449; font-size: 11px; line-height: 1.5; }

.reading-section {
  margin-top: 24px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: #e5eee9;
  box-shadow: var(--shadow);
  scroll-margin-top: 20px;
}

.reading-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.reading-heading p { margin: 6px 0 0; color: var(--muted); }
.reading-actions button { min-width: 74px; padding: 0 12px; }
.reading-actions span { min-width: 70px; text-align: center; font-weight: 700; }

.reading-pages {
  min-height: 520px;
  display: grid;
  place-items: center;
  perspective: 1600px;
  outline: none;
  overflow: hidden;
}

.reading-pages:focus-visible { border-radius: 18px; outline: 4px solid rgba(241, 196, 83, 0.9); outline-offset: 5px; }
.book-opening { position: relative; width: min(84vw, 780px); display: flex; align-items: stretch; justify-content: center; transform-style: preserve-3d; filter: drop-shadow(0 22px 22px rgba(23, 53, 45, 0.2)); }
.reading-page {
  position: relative;
  width: 50%;
  aspect-ratio: 210 / 297;
  overflow: hidden;
  border: 1px solid #b8c3bd;
  background: #fff;
  backface-visibility: hidden;
  transform-style: preserve-3d;
}

.reading-page.left-page { border-radius: 14px 2px 2px 14px; transform: rotateY(2deg); transform-origin: right center; }
.reading-page.right-page { border-left: 0; border-radius: 2px 14px 14px 2px; transform: rotateY(-2deg); transform-origin: left center; }
.reading-page.blank-page { visibility: hidden; }
.book-opening.front-cover .left-page,
.book-opening.back-cover .right-page { visibility: hidden; }
.book-opening.front-cover .right-page { border-left: 1px solid #b8c3bd; box-shadow: -9px 7px 0 #d9dedb, -14px 12px 25px rgba(23, 53, 45, 0.18); }
.book-opening.back-cover .left-page { box-shadow: 9px 7px 0 #d9dedb, 14px 12px 25px rgba(23, 53, 45, 0.18); }
.book-spine { position: absolute; z-index: 8; top: 1.5%; bottom: 1.5%; left: 50%; width: 14px; pointer-events: none; transform: translateX(-50%); background: linear-gradient(90deg, rgba(23,53,45,.2), rgba(255,255,255,.7) 46%, rgba(23,53,45,.22)); filter: blur(1px); opacity: .72; }
.book-opening.front-cover .book-spine,
.book-opening.back-cover .book-spine { display: none; }
.page-purpose { position: absolute; z-index: 5; top: 10px; left: 10px; padding: 5px 8px; border: 1px solid rgba(23, 53, 45, 0.16); border-radius: 999px; color: #365a4f; background: rgba(255,255,255,.9); font-size: 11px; font-weight: 800; }
.reader-page-number { position: absolute; z-index: 5; bottom: 9px; left: 50%; min-width: 25px; padding: 3px 6px; border-radius: 999px; color: #53655f; background: rgba(255,255,255,.86); transform: translateX(-50%); text-align: center; font-size: 10px; }

.reading-pages.is-turning-next .right-page { z-index: 10; animation: flip-next-out .34s cubic-bezier(.55,.08,.68,.53) both; }
.reading-pages.is-turning-previous .left-page { z-index: 10; animation: flip-previous-out .34s cubic-bezier(.55,.08,.68,.53) both; }
.reading-pages.is-arriving-next .book-opening { animation: arrive-from-right .36s cubic-bezier(.22,.61,.36,1) both; }
.reading-pages.is-arriving-previous .book-opening { animation: arrive-from-left .36s cubic-bezier(.22,.61,.36,1) both; }

@keyframes flip-next-out {
  from { transform: rotateY(-2deg); filter: brightness(1); }
  to { transform: rotateY(-86deg); filter: brightness(.82); }
}
@keyframes flip-previous-out {
  from { transform: rotateY(2deg); filter: brightness(1); }
  to { transform: rotateY(86deg); filter: brightness(.82); }
}
@keyframes arrive-from-right {
  from { opacity: .45; transform: translateX(18px) rotateY(-5deg); }
  to { opacity: 1; transform: none; }
}
@keyframes arrive-from-left {
  from { opacity: .45; transform: translateX(-18px) rotateY(5deg); }
  to { opacity: 1; transform: none; }
}

.reading-object { position: absolute; overflow: hidden; }
.reading-object.text { display: flex; padding: 5px; white-space: pre-wrap; word-break: break-word; }
.reading-object.image img { width: 100%; height: 100%; display: block; object-fit: contain; }
.reading-empty { display: grid; place-items: center; color: #8b9994; }

footer { padding: 28px 14px 0; color: var(--muted); text-align: center; font-size: 13px; }

.reading-dialog[hidden] { display: none; }
body.reading-dialog-open { overflow: hidden; }

.reading-dialog {
  position: fixed;
  z-index: 1200;
  inset: 0;
  width: auto;
  max-width: none;
  margin: 0;
  overflow: auto;
  padding: 28px;
  border: 0;
  border-radius: 0;
  background: rgba(20, 39, 34, .72);
  backdrop-filter: blur(5px);
}

.reading-dialog-card {
  position: relative;
  width: min(100%, 1120px);
  min-height: calc(100vh - 56px);
  margin: 0 auto;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, .7);
  border-radius: 26px;
  background: #f7f3e8;
  box-shadow: 0 28px 80px rgba(10, 27, 22, .34);
}

.reading-dialog-close {
  position: absolute;
  z-index: 20;
  top: 18px;
  right: 18px;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid #b9c8c1;
  border-radius: 999px;
  color: #314f46;
  background: #fff;
  cursor: pointer;
  font-weight: 900;
}

.reading-dialog .reading-heading { padding-right: 92px; }
.reading-dialog .reading-pages { min-height: min(68vh, 720px); }

@media (min-width: 821px) {
  .app-shell { padding-bottom: 0; }

  .app-shell > .editor-layout {
    height: calc(100dvh - 84px);
    align-items: stretch;
  }

  .app-shell > footer { display: none; }

  .page-panel {
    height: 100%;
    max-height: none;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .page-list {
    flex: 1 1 auto;
    max-height: none;
  }

  .work-panel {
    height: 100%;
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr);
  }

  .tool-shelf {
    display: block;
    padding: 8px 12px;
  }

  .tool-shelf .tool-label,
  .canvas-guide { display: none; }

  .tool-buttons {
    width: 100%;
    margin-top: 0;
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 6px;
  }

  .tool-buttons .main-tool-button {
    min-width: 0;
    min-height: 40px;
    padding: 4px 6px;
    line-height: 1.2;
  }

  .text-toolbar:not([hidden]) {
    display: flex;
    align-items: end;
    gap: 7px;
    overflow-x: auto;
    padding: 7px 12px;
  }

  .text-toolbar > label { flex: 0 0 118px; }
  .text-toolbar > label:first-child { flex-basis: 150px; }
  .text-toolbar select,
  .text-toolbar input[type="number"],
  .text-toolbar button { min-height: 38px; }
  .text-toolbar .color-with-clear input { width: 38px; height: 38px; }
  .text-toolbar .toggle-group,
  .text-toolbar .align-group { flex: 0 0 auto; }

  .compact-editor-controls { padding: 6px 12px; }
  .compact-editor-menu > summary { min-height: 38px; }

  .canvas-area {
    min-height: 0;
    height: 100%;
    padding: 16px;
  }
}

@media (max-width: 1280px) {
  .editor-layout { grid-template-columns: 210px minmax(0, 1fr); }
  .text-toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .align-group { grid-column: 1 / -1; }
  .revision-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  .app-shell { width: min(100% - 18px, 680px); }
  .project-bar { grid-template-columns: minmax(150px, 1fr) auto auto auto; align-items: center; gap: 6px; }
  .editor-layout { grid-template-columns: 1fr; }
  .page-panel { position: static; }
  .page-list { max-height: 280px; grid-template-columns: 1fr; }
  .page-list button { grid-template-columns: 34px 1fr; }
  .page-list .spread-drag-handle { grid-template-columns: 1fr; }
  .spread-list-pages .page-list-button { grid-template-columns: 30px minmax(0, 1fr); }
  .work-panel { grid-row: 2; }
  .detail-panel { display: block; }
  .page-detail-box, .print-notice { margin-top: 18px; }
  .canvas-area { min-height: 540px; padding: 22px 14px; }
  .spread-canvas { grid-template-columns: minmax(0, 1fr) 104px; gap: 6px; }
  .page-edit-slot.active { grid-column: 1; grid-row: 1; }
  .page-edit-slot:not(.active):not(.empty) { grid-column: 2; grid-row: 1; padding: 4px; }
  .page-edit-slot:not(.active) .page-side-picker { min-height: 36px; justify-content: center; padding: 0 5px; }
  .page-edit-slot:not(.active) .page-side-picker strong { display: none; }
  .page-edit-slot.empty { display: none; }
  .edit-book-spine { display: none; }
  .tool-shelf { align-items: flex-start; }
  .canvas-guide { display: none; }
  .reading-heading { align-items: flex-start; flex-direction: column; }
  .reading-pages { min-height: 360px; }
  .reading-page { width: 48%; }
  .revision-list { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  .project-bar { grid-template-columns: minmax(100px, 1fr) auto auto auto; gap: 4px; }
  .book-title-field { display: block; }
  .book-title-field > span { display: none; }
  .book-title-field input { min-height: 36px; padding: 0 8px; font-size: 14px; }
  .save-state { min-height: 36px; gap: 5px; font-size: 0; }
  .save-state::after { content: "저장됨"; font-size: 10px; font-weight: 800; }
  .save-state.saving::after { content: "저장 중"; }
  .save-state.error::after { content: "저장 오류"; color: #a43f2d; }
  #saveStateText { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .save-dot { width: 8px; height: 8px; box-shadow: 0 0 0 3px var(--green-soft); }
  .compact-menu > summary { min-height: 36px; padding: 0 7px; font-size: 11px; }
  .revision-count { min-height: 24px; padding: 0 6px; font-size: 10px; }
  .book-file-menu > summary { max-width: 58px; }
  .revision-content { position: fixed; top: 104px; right: 9px; left: calc(9px + var(--compact-viewport-offset, 0px)); width: auto; max-height: calc(100vh - 116px); }
  .book-file-content { right: 0; }
  .page-list, .text-toolbar { grid-template-columns: 1fr; }
  .page-list { max-height: 260px; }
  .tool-shelf, .tool-buttons { display: grid; grid-template-columns: 1fr 1fr; }
  .tool-shelf > div:first-child { grid-column: 1 / -1; }
  .main-tool-button { min-width: 0; min-height: 50px; padding: 0 8px; }
  .swap-spread-button { grid-column: 1 / -1; }
  .text-toolbar .align-group { grid-column: auto; display: grid; grid-template-columns: repeat(3, 1fr); }
  .toggle-group { display: grid; grid-template-columns: repeat(3, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .compact-editor-controls { flex-wrap: wrap; }
  .compact-editor-menu { flex: 1 1 140px; }
  .compact-editor-menu > summary { width: 100%; }
  .print-settings-dialog { width: 100%; max-height: 100dvh; margin: 0; border-radius: 0; }
  .print-settings-dialog-card { min-height: 100dvh; max-height: 100dvh; padding: 18px 12px; border-radius: 0; }
  .reading-section { padding: 20px 12px; }
  .reading-dialog { padding: 10px; }
  .reading-dialog-card { min-height: calc(100vh - 20px); padding: 68px 12px 22px; border-radius: 20px; }
  .reading-dialog-close { top: 14px; right: 14px; }
  .reading-dialog .reading-heading { padding-right: 0; }
  .reading-pages { min-height: 300px; }
  .book-opening { width: 100%; }
  .page-purpose { top: 5px; left: 5px; padding: 3px 5px; font-size: 8px; }
  .reader-page-number { bottom: 4px; font-size: 8px; }
  .book-spine { width: 8px; }
  .revision-create { align-items: stretch; flex-direction: column; }
  .revision-create label { min-width: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}