/* 문제지 만들기 화면 — 미국판 생성기와 같은 구조
   (빠른 시작 → 학년 → 빠른 설정 → 설정 레일 + 미리보기)를 한 화면에 담는다. */

.page-generator {
  height: 100vh;
  /* 아래에 footer 가 붙으므로 세로 스크롤은 허용한다 (생성기 자체는 그대로 100vh) */
  overflow-x: hidden;
  overflow-y: auto;
  background: var(--bg);
}

/* 머리말은 생성기 화면에서만 얇게 */
.page-generator .app-header {
  height: 54px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.page-generator .app-header .inner { height: 54px; max-width: none; }

.gen-page {
  height: calc(100vh - 54px);
  padding: 10px 14px 14px;
  display: flex;
}

.gen-shell {
  --rail-w: 500px;
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 26px 60px -44px rgba(61, 51, 41, .55);
  overflow: hidden;
}

/* ── 빠른 시작 ─────────────────────────────────────── */
.gen-shell .quick-guide {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 22px;
  height: 34px;
  border-bottom: 1px solid var(--line);
  background: #fdfaf5;
  font-size: 11.5px;
  color: var(--muted);
}
.gen-shell .quick-guide__label {
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-size: 10px;
  color: var(--soft);
}
.gen-shell .quick-guide__steps { display: flex; align-items: center; gap: 10px; }
.gen-shell .quick-guide__step { display: inline-flex; align-items: center; gap: 6px; }
.gen-shell .quick-guide__step b {
  display: grid;
  place-items: center;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green-dark);
  font-size: 10px;
  font-weight: 800;
}
.gen-shell .quick-guide__arrow { color: #c8bfb2; font-size: 11px; }
.gen-shell .quick-guide__right { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.gen-shell .quick-guide__link {
  font-weight: 700;
  color: var(--green);
  font-size: 11.5px;
}
.gen-shell .quick-guide__button {
  border: 0;
  padding: 0;
  background: none;
  cursor: pointer;
}
.gen-shell .quick-guide__button:hover { text-decoration: underline; }

/* ── 1. 학년 ───────────────────────────────────────── */
.gen-shell .grade-bar {
  flex: 0 0 auto;
  padding: 12px 22px 0;
}
.gen-shell .grade-bar__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.gen-shell .grade-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 7px;
}
.gen-shell .grade-grid button {
  height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -.01em;
  cursor: pointer;
  transition: background .14s, border-color .14s, color .14s;
}
.gen-shell .grade-grid button:hover { border-color: var(--green); color: var(--green-dark); }
.gen-shell .grade-grid button[aria-pressed="true"] {
  background: var(--green-soft);
  border-color: var(--green);
  color: var(--green-dark);
}

/* 학기 토글 (학년 줄 오른쪽) */
.gen-shell .semester-toggle {
  margin-left: 2px;
  display: inline-flex;
  padding: 2px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 9px;
}
.gen-shell .grade-bar__hint {
  margin-left: auto;
  font-size: 11px;
  color: var(--soft);
  white-space: nowrap;
}
.gen-shell .semester-toggle button {
  padding: 5px 13px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}
.gen-shell .semester-toggle button[aria-pressed="true"] {
  background: #fff;
  color: var(--green-dark);
  box-shadow: 0 1px 2px rgba(61, 51, 41, .12);
}

/* ── 빠른 설정 ─────────────────────────────────────── */
.gen-shell .preset-bar {
  flex: 0 0 auto;
  padding: 12px 0 12px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(#fffdfa, #fdfaf5);
}
.gen-shell .preset-bar__main {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  align-items: center;
}
.gen-shell .preset-bar__left {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0 22px;
}
.gen-shell .preset-bar__head { display: flex; align-items: center; gap: 12px; min-width: 0; }
.gen-shell .preset-bar__label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--soft);
  flex: 0 0 auto;
}
.gen-shell .preset-bar__buttons {
  display: flex;
  gap: 6px;
  overflow: visible;
  scrollbar-width: none;
}
.gen-shell .preset-bar__buttons::-webkit-scrollbar { display: none; }
.gen-shell .preset-chip {
  flex: 0 0 auto;
  padding: 6px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background .14s, border-color .14s, color .14s;
}
.gen-shell .preset-chip:hover { border-color: var(--green); color: var(--green-dark); }
.gen-shell .preset-chip[aria-pressed="true"] {
  background: var(--green-soft);
  border-color: var(--green);
  color: var(--green-dark);
  font-weight: 700;
}
.gen-shell .preset-bar__center {
  grid-column: 2;
  justify-self: center;
  margin: 0;
  padding: 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.gen-shell .preset-bar__summary {
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-left: 11px;
  border-left: 3px solid var(--green);
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.5;
}

/* ── 공통 버튼 ─────────────────────────────────────── */
.gen-shell .btn-generate {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 20px;
  border: 0;
  border-radius: 11px;
  background: var(--green);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -.01em;
  cursor: pointer;
  transition: background .14s;
}
.gen-shell .btn-generate:hover { background: var(--green-dark); }
.gen-shell .btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: #fff;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.gen-shell .btn-outline:hover { border-color: var(--green); color: var(--green-dark); }

/* ── 작업 영역 ─────────────────────────────────────── */
.gen-shell .app-workspace {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
}

/* 왼쪽 설정 레일 */
.gen-shell .control-rail {
  display: flex;
  min-height: 0;
  border-right: 1px solid var(--line);
  background: var(--surface);
}
.gen-shell .generator-form {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 0;
  margin: 0;
}
.gen-shell .form-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 14px 20px 6px 22px;
  scrollbar-width: thin;
  scrollbar-color: #d8d0c4 transparent;
}
.gen-shell .form-scroll::-webkit-scrollbar { width: 6px; }
.gen-shell .form-scroll::-webkit-scrollbar-thumb { background: #d8d0c4; border-radius: 3px; }

.gen-shell .field-group { margin-bottom: 12px; }
.gen-shell .field-group:last-child { margin-bottom: 4px; }
.gen-shell .field-group__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
/* 단계 번호: 1. 2. 3. … */
.gen-shell .field-label {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  counter-increment: step;
}
.gen-shell .field-label::before {
  content: counter(step) ".";
  font-size: 11px;
  font-weight: 800;
}
.gen-shell { counter-reset: step; }
.gen-shell .skill-meta { margin-left: auto; color: var(--soft); font-size: 11px; }
.gen-shell .skill-actions { margin-left: auto; display: flex; gap: 5px; }
.gen-shell .mini-btn {
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}
.gen-shell .mini-btn:hover { border-color: var(--green); color: var(--green-dark); }

/* 2. 유형 */
.gen-shell .type-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px;
}
.gen-shell .type-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 4px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background .14s, border-color .14s;
}
.gen-shell .type-card:hover:not(:disabled) { border-color: var(--green); }
.gen-shell .type-card[aria-pressed="true"] {
  background: var(--green-soft);
  border-color: var(--green);
  color: var(--green-dark);
  font-weight: 700;
}
.gen-shell .type-card:disabled { opacity: .35; cursor: not-allowed; }
.gen-shell .type-card .op {
  display: grid;
  place-items: center;
  width: 17px; height: 17px;
  border-radius: 5px;
  background: var(--surface-soft);
  font-size: 10px;
  font-weight: 800;
  color: var(--muted);
}
.gen-shell .type-card[aria-pressed="true"] .op { background: #fff; color: var(--green-dark); }

/* 3. 단원 */
.gen-shell .unit-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 5px;
  max-height: 320px;
  overflow-y: auto;
  padding-right: 3px;
  scrollbar-width: thin;
}
.gen-shell .unit-list::-webkit-scrollbar { width: 5px; }
.gen-shell .unit-list::-webkit-scrollbar-thumb { background: #d8d0c4; border-radius: 3px; }
.gen-shell .unit-list::-webkit-scrollbar { width: 6px; }
.gen-shell .unit-list::-webkit-scrollbar-thumb { background: #d8d0c4; border-radius: 3px; }
.gen-shell .unit-item {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 5px 8px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: #fbf8f3;
  color: var(--ink);
  font-size: 12.5px;
  cursor: pointer;
  text-align: left;
  transition: background .12s, border-color .12s;
}
.gen-shell .unit-item:hover { background: #f6f1e8; }
.gen-shell .unit-item[aria-pressed="true"] {
  background: var(--green-soft);
  border-color: #c8ded2;
  color: var(--green-dark);
  font-weight: 700;
}
.gen-shell .unit-item .no {
  flex: 0 0 auto;
  width: 17px;
  color: var(--soft);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}
.gen-shell .unit-item[aria-pressed="true"] .no { color: var(--green); }
.gen-shell .unit-item .name { flex: 1 1 auto; min-width: 0; }
.gen-shell .unit-item .kind {
  flex: 0 0 auto;
  font-size: 10px;
  color: var(--soft);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
}
.gen-shell .unit-item[aria-pressed="true"] .kind { background: #fff; color: var(--green-dark); border-color: #c8ded2; }
.gen-shell .skills-empty { margin: 6px 0 0; font-size: 11.5px; color: var(--soft); }

/* ── 하단 독 (항상 보임) ───────────────────────────── */
.gen-shell .control-dock {
  flex: 0 0 auto;
  padding: 10px 20px 10px 22px;
  border-top: 1px solid var(--line);
  background: #fdfbf7;
}
.gen-shell .dock-quick { display: flex; flex-direction: column; gap: 10px; }
.gen-shell .dock-quick__group { min-width: 0; }
.gen-shell .dock-quick__group .field-label { font-size: 10px; }
.gen-shell .difficulty-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin-top: 6px;
}
.gen-shell .difficulty-option {
  padding: 7px 0;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
}
.gen-shell .difficulty-option[aria-pressed="true"] {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}
.gen-shell .difficulty-description {
  margin: 6px 0 0;
  font-size: 11px;
  line-height: 1.45;
  color: var(--soft);
}
.gen-shell .count-presets { margin-left: auto; display: flex; gap: 4px; }
.gen-shell .count-presets button {
  min-width: 30px;
  padding: 3px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}
.gen-shell .count-presets button[aria-pressed="true"] {
  background: var(--green-soft);
  border-color: var(--green);
  color: var(--green-dark);
}
.gen-shell .count-row { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.gen-shell .number-input-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}
.gen-shell .number-input-wrapper:focus-within {
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-soft);
}
.gen-shell .number-input-wrapper input {
  width: 62px;
  padding: 7px 8px;
  border: 0;
  outline: none;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  font-variant-numeric: tabular-nums;
  background: transparent;
}
.gen-shell .number-arrows {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
}
.gen-shell .number-arrow-btn {
  width: 20px;
  height: 15px;
  border: 0;
  background: #fdfbf7;
  color: var(--muted);
  font-size: 7px;
  line-height: 1;
  cursor: pointer;
}
.gen-shell .number-arrow-btn:hover:not(:disabled) { background: var(--green-soft); color: var(--green-dark); }
.gen-shell .number-arrow-btn:disabled { opacity: .35; cursor: default; }
.gen-shell .count-hint { font-size: 11.5px; color: var(--soft); }
.gen-shell .quick-answer-row { display: flex; align-items: center; gap: 8px; margin-top: 7px; }
.gen-shell .checkbox-group {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
}
.gen-shell .checkbox-group input { width: 14px; height: 14px; accent-color: var(--green); }
.gen-shell .layout-row { display: flex; gap: 4px; align-items: center; margin-left: 2px; padding-left: 8px; border-left: 1px solid var(--line); }
.gen-shell .layout-row .layout-label { font-size: 10.5px; color: var(--soft); margin-right: 2px; }
.gen-shell .layout-row button {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
}
.gen-shell .layout-row button[aria-pressed="true"] {
  background: var(--green-soft);
  border-color: var(--green);
  color: var(--green-dark);
}
.gen-shell .layout-row button:disabled { opacity: .35; cursor: not-allowed; }

.gen-shell .dock-primary {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.gen-shell .dock-primary .btn-generate { flex: 1 1 auto; height: 38px; }
.gen-shell .btn-reset {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #fff;
  color: var(--muted);
  font-size: 15px;
  cursor: pointer;
}
.gen-shell .btn-reset:hover { border-color: var(--green); color: var(--green-dark); }
.gen-shell .dock-secondary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 5px;
  margin-top: 7px;
}
.gen-shell .dock-secondary button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}
.gen-shell .dock-secondary button:hover:not(:disabled) { border-color: var(--green); color: var(--green-dark); }
.gen-shell .dock-secondary button:disabled { opacity: .4; cursor: not-allowed; }
.gen-shell .dock-secondary svg { width: 13px; height: 13px; }
.gen-shell .status { min-height: 14px; margin-top: 5px; font-size: 11px; color: var(--soft); }
.gen-shell .status.error { color: #b4453a; }
.gen-shell .status.ok { color: var(--green-dark); }

/* ── 오른쪽 미리보기 ───────────────────────────────── */
.gen-shell .preview-rail {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--surface-soft);
}
.gen-shell .preview-toolbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  height: 42px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: #faf6ef;
}
.gen-shell .preview-heading { display: flex; align-items: baseline; gap: 9px; min-width: 0; }
.gen-shell .preview-eyebrow {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--soft);
}
.gen-shell #preview-summary {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.gen-shell .preview-actions { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.gen-shell #page-summary { font-size: 11.5px; color: var(--soft); margin-right: 4px; }
.gen-shell .preview-actions button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
}
.gen-shell .preview-actions button:hover:not(:disabled) { border-color: var(--green); color: var(--green-dark); }
.gen-shell .preview-actions button:disabled { opacity: .4; cursor: not-allowed; }
.gen-shell .preview-actions button[aria-pressed="true"] {
  background: var(--green-soft);
  border-color: var(--green);
  color: var(--green-dark);
}
.gen-shell .preview-actions svg { width: 13px; height: 13px; }

.gen-shell .preview-stage {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 18px;
  background:
    radial-gradient(circle at 50% 0, rgba(255, 255, 255, .9), transparent 60%),
    var(--surface-soft);
}
.gen-shell .preview-canvas {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}
.gen-shell .preview-frame {
  position: relative;
  overflow: hidden;
  margin: auto;
  transition: height .15s ease;
}
.gen-shell #preview {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: top left;
  width: 210mm;
}
.gen-shell #preview .sheet {
  background: #fff;
  border: 1px solid #e8e2d8;
  box-shadow: 0 16px 38px -26px rgba(61, 51, 41, .5);
  margin-bottom: 16px;
  border-radius: 2px;
}
.gen-shell #preview .sheet:last-child { margin-bottom: 0; }

.gen-shell .preview-empty[hidden] { display: none !important; }
.gen-shell .preview-frame[hidden] { display: none !important; }
.gen-shell .preview-empty {
  display: grid;
  place-items: center;
  gap: 10px;
  padding: 60px 20px;
  color: var(--soft);
  font-size: 13px;
  text-align: center;
}
.gen-shell .preview-empty__icon { font-size: 26px; opacity: .7; }

/* ── 높이가 낮은 노트북: 설정 칸을 조금 더 준다 ────── */
@media (max-height: 880px) {
  .gen-shell .grade-bar { padding-top: 10px; }
  .gen-shell .preset-bar { padding-top: 10px; padding-bottom: 10px; }
  .gen-shell .difficulty-description { display: none; }
  .gen-shell .control-dock { padding-top: 8px; padding-bottom: 8px; }
  .gen-shell .dock-quick { gap: 7px; }
  .gen-shell .difficulty-options { margin-top: 5px; }
  .gen-shell .count-row { margin-top: 5px; }
  .gen-shell .layout-row { margin-top: 6px; }
  .gen-shell .dock-primary { margin-top: 8px; }
  .gen-shell .type-card { padding: 7px 4px; font-size: 12px; }
  .gen-shell .unit-list { max-height: 112px; }
}
@media (max-height: 700px) {
  .page-generator { height: auto; overflow: visible; }
  .gen-page { height: auto; }
  .gen-shell { overflow: visible; }
}

/* ── 좁은 화면 ─────────────────────────────────────── */
@media (max-width: 1180px) {
  .page-generator { height: auto; overflow: visible; }
  .gen-page { height: auto; }
  .gen-shell { overflow: visible; }
  .gen-shell .app-workspace { grid-template-columns: minmax(0, 1fr); }
  .gen-shell .control-rail { border-right: 0; border-bottom: 1px solid var(--line); }
  .gen-shell .form-scroll { overflow: visible; max-height: none; flex: 0 0 auto; min-height: 260px; }
  .gen-shell .unit-list { max-height: 260px; }
  .gen-shell .preview-stage { padding: 12px; min-height: 520px; }
}
@media (max-width: 760px) {
  .gen-page { padding: 8px; }
  .gen-shell { border-radius: 16px; }
  /* 좁은 화면에서도 빠른 시작 안내는 남긴다. 줄바꿈으로 높이만 늘린다. */
  .gen-shell .quick-guide {
    flex-wrap: wrap;
    height: auto;
    min-height: 32px;
    gap: 4px 12px;
    padding: 7px 14px;
    font-size: 11px;
    line-height: 1.35;
  }
  .gen-shell .quick-guide__steps { flex-wrap: wrap; gap: 4px 8px; }
  .gen-shell .quick-guide__step { gap: 5px; }
  .gen-shell .quick-guide__step b { width: 15px; height: 15px; font-size: 9.5px; }
  .gen-shell .quick-guide__arrow { font-size: 10px; }
  .gen-shell .quick-guide__right { margin-left: auto; gap: 10px; }
  .gen-shell .grade-bar { padding-left: 14px; padding-right: 14px; }
  .gen-shell .preset-bar__left { padding: 0 14px; }
  .gen-shell .preset-bar__center { padding: 0 14px; }
  .gen-shell .grade-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .gen-shell .grade-bar__hint { display: none; }
  .gen-shell .preset-bar__main { display: flex; flex-wrap: wrap; }
  .gen-shell .preset-bar__left { width: 100%; }
  .gen-shell .preset-bar__summary { white-space: normal; overflow: visible; text-overflow: clip; }
  .gen-shell .preset-bar__head { flex-wrap: wrap; gap: 6px 10px; }
  .gen-shell .preset-bar__buttons { flex-wrap: wrap; overflow: visible; gap: 6px; }
  .gen-shell .preset-bar__center { grid-column: auto; justify-self: stretch; margin-left: 0; width: 100%; }
  .gen-shell .preset-bar__center .btn-generate { flex: 1 1 auto; }
  .gen-shell .form-scroll { padding-left: 14px; padding-right: 14px; }
  .gen-shell .control-dock { padding-left: 14px; padding-right: 14px; }
  .gen-shell .preview-toolbar { flex-wrap: wrap; height: auto; padding: 8px 12px; gap: 8px; }
  .gen-shell .preview-actions { margin-left: 0; }
}
@media (max-width: 430px) {
  .gen-shell .quick-guide { gap: 5px 10px; }
  .gen-shell .quick-guide__label { display: none; }
  .gen-shell .quick-guide__arrow { display: none; }
  .gen-shell .quick-guide__steps { gap: 4px 10px; }
  .gen-shell .quick-guide__right { gap: 8px; }
  .gen-shell .quick-guide__link { display: none; }
  .gen-shell .quick-guide__step b { width: 14px; height: 14px; font-size: 9px; }
}

.gen-shell .answer-check { margin-left: auto; white-space: nowrap; }
/* 미리보기 눈 아이콘: 터치 기기 + 좁은 화면에서만 노출 (JS가 인라인으로도 한 번 더 막는다) */
.gen-shell #open-preview-bottom.preview-eye svg { width: 18px; height: 18px; }

/* ── 미리보기 모달 ─────────────────────────────────── */
.preview-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 14px;
}
.preview-modal[hidden] { display: none !important; }
.preview-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(24, 30, 38, .55);
  backdrop-filter: blur(2px);
}
.preview-modal__panel {
  position: relative;
  display: flex;
  flex-direction: column;
  width: min(860px, 100%);
  max-height: min(92vh, 1080px);
  background: #fffdfa;
  border-radius: 18px;
  box-shadow: 0 24px 70px rgba(20, 24, 30, .3);
  overflow: hidden;
}
.preview-modal__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  background: #fbf7f0;
}
.preview-modal__heading { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.preview-modal__heading strong {
  font-size: 13.5px;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.preview-modal__heading #modal-meta { font-size: 11px; color: var(--soft); }
.preview-modal__actions { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.preview-modal__actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: 30px;
  padding: 0 11px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: #fff;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
}
.preview-modal__actions button:hover { border-color: var(--green); color: var(--green-dark); }
.preview-modal__actions svg { width: 13px; height: 13px; }
.preview-modal__close { width: 30px; padding: 0; font-size: 13px; }
.preview-modal__body {
  --modal-scale: 1;
  overflow: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  background: #efe9df;
  min-height: 0;
}
.preview-modal__sheet {
  flex: 0 0 auto;
  width: calc(794px * var(--modal-scale));
  height: calc(1123px * var(--modal-scale));
  overflow: hidden;
  background: #fff;
  box-shadow: 0 6px 18px rgba(20, 24, 30, .16);
}
.preview-modal__sheet .sheet {
  transform: scale(var(--modal-scale));
  transform-origin: top left;
  margin: 0;
  box-shadow: none;
  border: 0;
}
.preview-modal__foot {
  padding: 8px 14px;
  border-top: 1px solid var(--line);
  background: #fbf7f0;
  font-size: 11px;
  color: var(--soft);
}
.preview-modal__foot kbd {
  font: inherit;
  padding: 1px 5px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: #fff;
}
body.modal-open { overflow: hidden; }
@media (max-width: 760px) {
  .preview-modal { padding: 0; }
  .preview-modal__panel { width: 100%; max-height: 100dvh; height: 100dvh; border-radius: 0; }
  .preview-modal__body { padding: 10px; }
}

/* 넓은 화면(2단)에서는 난이도·문항 수를 단원 목록 바로 아래로 올린다.
   좁은 화면은 세로로 쌓여 높이가 내용에 맞춰지므로 건드리지 않는다. */
@media (min-width: 1181px) {
  /* 위쪽(유형·단원)은 내용 높이만큼만 쓰고, 남는 높이는 아래 기능 영역이 이어받는다.
     → 단원 목록과 난이도 사이에 빈 틈이 생기지 않고, 레일 바닥은 오른쪽 미리보기와 그대로 맞는다. */
  .gen-shell .form-scroll { flex: 0 1 auto; min-height: 240px; }
  .gen-shell .control-dock { flex: 1 1 auto; }
  .gen-shell .control-rail { overflow-y: auto; }
}

/* ── 페이지 안에 직접 넣는 생성기 (iframe 아님) ─────────────────
   .unit-generator 안에서는 100vh 대신 컨테이너 높이를 쓴다. */
.unit-generator {
  position: relative;
  height: clamp(560px, calc(100dvh - 160px), 900px);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: var(--bg);
  box-shadow: 0 12px 34px -26px rgba(61, 51, 41, .65);
}
.unit-generator .gen-page { height: 100%; padding: 0; }
.unit-generator .gen-shell { border: 0; border-radius: 0; box-shadow: none; }
.unit-generator .app-workspace { height: 100%; }
.unit-generator.is-compact .quick-guide,
.unit-generator.is-compact .preset-bar,
.unit-generator.is-compact .grade-bar { display: none; }

/* 좁은 화면에서는 페이지 본문의 버튼으로 안내한다 */
@media (max-width: 900px) {
  .unit-generator { display: none; }
  .unit-embed-note { display: block; }
}

/* 인쇄: 인라인 생성기가 있는 페이지는 문제지만 인쇄한다 */
@media print {
  body.has-inline-generator .app-header,
  body.has-inline-generator .app-footer,
  body.has-inline-generator main > *:not(.unit-generator) { display: none !important; }
  body.has-inline-generator .unit-generator {
    display: block !important; height: auto !important; border: 0 !important;
    border-radius: 0 !important; box-shadow: none !important; overflow: visible !important;
  }
  body.has-inline-generator .unit-generator .gen-page,
  body.has-inline-generator .unit-generator .gen-shell { height: auto !important; }
}

/* ── 지연 로딩: 버튼을 누르면 스크립트를 불러온다 ───────────────── */
.unit-generator.is-lazy { height: 320px; }
.unit-generator.is-lazy .gen-page { visibility: hidden; }
.unit-generator .gen-loading { display: none; }
.unit-generator.is-lazy .gen-loading {
  display: flex;
  position: absolute; inset: 0; z-index: 2;
  flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  background: var(--surface); text-align: center; padding: 24px;
}
.unit-generator.is-lazy .gen-loading p { margin: 0; font-size: 14px; color: var(--ink-soft); }
.unit-generator.is-loading .gen-loading p { opacity: .6; }
.unit-generator.is-error .gen-loading .gen-loading__hint::after { content: ' 불러오지 못했습니다. 새로고침해 주세요.'; color: #b44343; }