/* ===========================================================
   Home page — single-screen worksheet generator
   Dark control rail + live paper preview, modelled on the
   approved generator-demo layout. Scoped to .app-home so the
   SEO worksheet pages keep their existing light design.
   =========================================================== */

body.app-home {
  --rail-bg: #2b3544;
  --rail-bg-deep: #202936;
  --rail-line: #3b4759;
  --rail-text: #c9d4e2;
  --rail-muted: #8b98aa;
  --rail-accent: #10b981;
  --rail-cta: #3b82f6;

  height: 100vh;
  height: 100dvh;
  min-height: 0;
  overflow: hidden;
  background: var(--rail-bg);
  color: var(--rail-text);
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.app-home *,
.app-home *::before,
.app-home *::after {
  box-sizing: border-box;
}

/* ---------- Shared header ---------- */

.app-home .site-header {
  position: relative;
  top: auto;
  z-index: 30;
  flex: 0 0 60px;
  background: #212a36;
  border-bottom: 1px solid #364151;
  box-shadow: none;
}

.app-home .site-header__container {
  height: 60px;
  max-width: none;
  padding: 0 24px;
  gap: 20px;
}

.app-home .site-logo {
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #f6f8fb;
}

.app-home .site-logo:hover {
  color: #ffffff;
}

.app-home .site-logo__icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 3px 10px rgba(37, 99, 235, 0.35);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.app-home .main-nav {
  margin-left: auto;
  gap: 2px;
}

.app-home .main-nav__link,
.app-home .nav-dropdown__trigger {
  padding: 8px 12px;
  border-radius: 6px;
  color: #a9b7c9;
  font-size: 13px;
  font-weight: 500;
}

.app-home .main-nav__link:hover,
.app-home .nav-dropdown__trigger:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
}

.app-home .main-nav__link--active {
  color: #ffffff;
}

.app-home .main-nav__link--active::after {
  left: 12px;
  right: 12px;
  bottom: -0.1rem;
  height: 2px;
  background: var(--rail-accent);
}

.app-home .nav-dropdown__menu {
  background: #202936;
  border: 1px solid #3a4657;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.38);
}

.app-home .nav-dropdown__item {
  color: #c1cddb;
}

.app-home .nav-dropdown__item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
}

.app-home .nav-dropdown__divider {
  background: #364151;
}

.app-home .header-meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 10px;
  padding: 5px 11px;
  border: 1px solid #3a4657;
  border-radius: 999px;
  color: #8b98a9;
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  white-space: nowrap;
}

.app-home .header-meta::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--rail-accent);
}

.app-home .mobile-menu-toggle {
  color: #d4dde8;
}

.app-home .mobile-menu-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}

/* Mobile menu on dark rail */
.app-home .mobile-menu {
  background: #202936;
  color: #d4dde8;
}

.app-home .mobile-menu__header {
  border-bottom-color: #364151;
}

.app-home .mobile-menu__close {
  color: #d4dde8;
}

.app-home .mobile-menu__close:hover {
  background: rgba(255, 255, 255, 0.06);
}

.app-home .mobile-menu__link,
.app-home .mobile-menu__sublink {
  color: #b8c5d4;
}

.app-home .mobile-menu__link:hover,
.app-home .mobile-menu__sublink:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

.app-home .mobile-menu__link--active {
  background: rgba(16, 185, 129, 0.14);
  color: #ffffff;
}

.app-home .mobile-menu__section-title {
  color: #7f8da0;
}

.app-home .mobile-menu__nav {
  padding-bottom: 30px;
}

/* ---------- App shell ---------- */

.app-home .app-main {
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
}

.app-home .app-workspace {
  display: grid;
  grid-template-columns: 620px minmax(0, 1fr);
  height: 100%;
  min-height: 0;
}

/* ---------- Control rail ---------- */

.app-home .control-rail {
  display: flex;
  min-height: 0;
  padding: 20px 24px 16px 28px;
  background: var(--rail-bg);
  border-right: 1px solid #1d2632;
}

.app-home .generator-form {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 0;
  margin: 0;
}

.app-home .rail-heading {
  flex: none;
  margin-bottom: 11px;
}

.app-home .rail-title {
  margin: 0;
  color: #f5f7fa;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.app-home .rail-subtitle {
  margin: 3px 0 0;
  color: var(--rail-muted);
  font-size: 11px;
  letter-spacing: 0.02em;
}

.app-home .rail-subtitle span {
  color: #9aa9bb;
}

.app-home .form-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  padding-right: 8px;
  margin-right: -8px;
  scrollbar-width: thin;
  scrollbar-color: #4b596b transparent;
}

.app-home .form-scroll::-webkit-scrollbar {
  width: 6px;
}

.app-home .form-scroll::-webkit-scrollbar-thumb {
  background: #4b596b;
  border-radius: 3px;
}

.app-home .form-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.app-home .field-group {
  margin: 0 0 11px;
}

.app-home .field-group:last-child {
  margin-bottom: 4px;
}

.app-home .field-group__head {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 16px;
  margin-bottom: 6px;
}

.app-home .field-label {
  margin: 0;
  color: var(--rail-muted);
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

/* Operation pills */

.app-home .operation-options {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.app-home .operation-card {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  background: transparent;
  border: 1px solid #465264;
  border-radius: 999px;
  color: #c4d0df;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  font-family: inherit;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.app-home .operation-card .op-symbol {
  display: inline-block;
  width: 12px;
  color: #8fa0b5;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.app-home .operation-card:hover:not(:disabled) {
  border-color: #67778c;
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

.app-home .operation-card[aria-pressed="true"] {
  background: var(--rail-accent);
  border-color: var(--rail-accent);
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(16, 185, 129, 0.22);
}

.app-home .operation-card[aria-pressed="true"] .op-symbol {
  color: #ffffff;
}

.app-home .operation-card:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Grade row */

.app-home .grade-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 5px;
}

.app-home #levels button {
  padding: 8px 0;
  background: transparent;
  border: 1px solid #465264;
  border-radius: 7px;
  color: #c4d0df;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.app-home #levels button:hover:not(:disabled) {
  border-color: #67778c;
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

.app-home #levels button[aria-pressed="true"] {
  background: var(--rail-accent);
  border-color: var(--rail-accent);
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(16, 185, 129, 0.22);
}

.app-home #levels button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Skills */

.app-home .skill-meta {
  margin-left: auto;
  color: var(--rail-muted);
  font-size: 10px;
  font-weight: 500;
  white-space: nowrap;
}

.app-home .skill-actions {
  display: flex;
  gap: 4px;
}

.app-home .mini-btn {
  padding: 3px 8px;
  background: transparent;
  border: 1px solid #465264;
  border-radius: 4px;
  color: #93a2b5;
  font-family: inherit;
  font-size: 10px;
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.app-home .mini-btn:hover {
  border-color: #67778c;
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

.app-home #skills {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-home .topic-group {
  min-width: 0;
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.app-home .topic-group__title {
  margin: 0 0 3px;
  padding: 0;
  border: 0;
  color: #7d8a9d;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.app-home .topic-group__list {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 4px;
}

.app-home .topic-item {
  display: inline-flex;
  align-items: center;
  gap: 0;
  width: auto;
  max-width: 100%;
  margin: 0;
  padding: 5px 9px 5px 7px;
  background: transparent;
  border: 1px solid #465264;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.app-home .topic-item:hover {
  border-color: #67778c;
  background: rgba(255, 255, 255, 0.05);
}

.app-home .topic-item:has(input:checked) {
  background: rgba(16, 185, 129, 0.13);
  border-color: rgba(16, 185, 129, 0.55);
}

.app-home .topic-item__checkbox {
  width: 11px;
  height: 11px;
  margin: 0 6px 0 0;
  padding: 0;
  flex: none;
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  background: transparent;
  border: 1.5px solid #6b7a8d;
  border-radius: 3px;
  cursor: pointer;
}

.app-home .topic-item__checkbox:checked {
  background: var(--rail-accent);
  border-color: var(--rail-accent);
}

.app-home .topic-item__checkbox:checked::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 0.5px;
  width: 3px;
  height: 6px;
  border: solid #ffffff;
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(45deg);
}

.app-home .topic-item__label {
  flex: 1;
  min-width: 0;
  color: #c4d0df;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.25;
  white-space: normal;
  cursor: pointer;
  user-select: none;
}

.app-home .topic-item__standard {
  display: none;
}

.app-home .skills-empty {
  margin: 4px 0 0;
  padding: 0;
  background: none;
  border: 0;
  color: #fca5a5;
  font-size: 11px;
  line-height: 1.4;
}

/* Difficulty */

.app-home .difficulty-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
}

.app-home .difficulty-option {
  padding: 8px 4px;
  background: transparent;
  border: 1px solid #465264;
  border-radius: 7px;
  color: #c4d0df;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  text-align: center;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.app-home .difficulty-option:hover:not([aria-pressed="true"]) {
  border-color: #67778c;
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

.app-home .difficulty-option[aria-pressed="true"] {
  background: var(--rail-accent);
  border-color: var(--rail-accent);
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(16, 185, 129, 0.22);
}

/* Question count */

.app-home .count-presets {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.app-home .count-presets button {
  padding: 3px 8px;
  background: transparent;
  border: 1px solid #465264;
  border-radius: 4px;
  color: #93a2b5;
  font-family: inherit;
  font-size: 10px;
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.app-home .count-presets button:hover {
  border-color: #67778c;
  color: #ffffff;
}

.app-home .count-presets button[aria-pressed="true"] {
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.55);
  color: #ffffff;
}

.app-home .count-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-home .number-input-wrapper {
  position: relative;
  display: flex;
  flex: 1;
  min-width: 0;
}

.app-home #count {
  width: 100%;
  height: 34px;
  padding: 0 32px 0 11px;
  appearance: textfield;
  -moz-appearance: textfield;
  background: var(--rail-bg-deep);
  border: 1px solid #465264;
  border-radius: 7px;
  color: #e8eef6;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
}

.app-home #count::-webkit-outer-spin-button,
.app-home #count::-webkit-inner-spin-button {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
}

.app-home #count:focus {
  outline: none;
  border-color: var(--rail-accent);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.18);
}

.app-home .number-arrows {
  position: absolute;
  top: 1px;
  right: 1px;
  bottom: 1px;
  display: flex;
  flex-direction: column;
  width: 26px;
  overflow: hidden;
  border-left: 1px solid #3a4554;
  border-radius: 0 6px 6px 0;
}

.app-home .number-arrow-btn {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0;
  background: #2b3544;
  border: 0;
  color: #9fb0c4;
  font-size: 7px;
  line-height: 1;
  cursor: pointer;
}

.app-home .number-arrow-btn:first-child {
  border-bottom: 1px solid #3a4554;
}

.app-home .number-arrow-btn:hover {
  background: #39465a;
  color: #ffffff;
}

.app-home .count-hint {
  color: var(--rail-muted);
  font-size: 11px;
}

/* Advanced options */

.app-home .advanced-settings {
  margin-top: 7px;
  padding-top: 6px;
  border-top: 1px solid #3a4554;
}

.app-home .advanced-settings summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 2px 0;
  color: #8fa0b5;
  font-size: 11px;
  font-weight: 600;
  list-style: none;
  cursor: pointer;
}

.app-home .advanced-settings summary::-webkit-details-marker {
  display: none;
}

.app-home .advanced-settings summary::before {
  content: '+';
  color: var(--rail-accent);
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  transform: none;
}

.app-home .advanced-settings[open] summary::before {
  content: '−';
  transform: none;
}

.app-home .advanced-settings summary:hover {
  color: #ffffff;
}

.app-home .advanced-settings__content {
  margin-top: 8px;
}

.app-home .form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.app-home .form-field {
  min-width: 0;
}

.app-home .form-field--full {
  grid-column: 1 / -1;
}

.app-home .form-field label {
  display: block;
  margin: 0 0 4px;
  color: var(--rail-muted);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.app-home .form-field input,
.app-home .form-field select {
  width: 100%;
  height: 32px;
  padding: 0 9px;
  background: var(--rail-bg-deep);
  border: 1px solid #465264;
  border-radius: 5px;
  color: #d4dde8;
  font-family: inherit;
  font-size: 12px;
}

.app-home .form-field input:focus,
.app-home .form-field select:focus {
  outline: none;
  border-color: var(--rail-accent);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.16);
}

.app-home .form-field input::placeholder {
  color: #637185;
}

.app-home .form-field small {
  display: none;
}

.app-home .checkbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 8px;
  margin-top: 8px;
}

.app-home .checkbox-group {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  padding: 2px 0;
}

.app-home .checkbox-group input[type="checkbox"] {
  width: 13px;
  height: 13px;
  margin: 0;
  flex: none;
  accent-color: var(--rail-accent);
  cursor: pointer;
}

.app-home .checkbox-group label {
  margin: 0;
  color: #b9c5d4;
  font-size: 11.5px;
  font-weight: 400;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
}

.app-home .checkbox-group label small {
  display: none;
}

/* Generate dock */

.app-home .control-dock {
  flex: none;
  margin-top: 2px;
  padding-top: 9px;
  border-top: 1px solid #3a4554;
}

.app-home .dock-primary {
  display: flex;
  gap: 8px;
}

.app-home .btn-generate {
  display: inline-flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 18px;
  background: var(--rail-cta);
  border: 0;
  border-radius: 8px;
  color: #ffffff;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.28);
  transition: background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.app-home .btn-generate svg {
  width: 16px;
  height: 16px;
}

.app-home .btn-generate:hover {
  background: #2563eb;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.36);
}

.app-home .btn-generate:active {
  transform: translateY(0);
}

.app-home .btn-reset {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid #465264;
  border-radius: 8px;
  color: #aab8ca;
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.app-home .btn-reset:hover {
  border-color: #67778c;
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

.app-home .dock-secondary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  margin-top: 7px;
}

.app-home .dock-secondary button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 29px;
  padding: 0 4px;
  background: transparent;
  border: 1px solid #465264;
  border-radius: 6px;
  color: #aab8ca;
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.app-home .dock-secondary button:hover:not(:disabled) {
  border-color: #67778c;
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

.app-home .dock-secondary button:disabled {
  opacity: 0.32;
  cursor: not-allowed;
}

.app-home .control-dock .status {
  margin-top: 7px;
  padding: 7px 9px;
  background: rgba(59, 130, 246, 0.12);
  border-left: 2px solid var(--rail-cta);
  border-radius: 5px;
  color: #dbe7f5;
  font-size: 10.5px;
  line-height: 1.45;
}

.app-home .control-dock .status.error {
  background: rgba(239, 68, 68, 0.13);
  border-left-color: #ef4444;
  color: #fecaca;
}

.app-home .control-dock .status.notice {
  background: rgba(245, 158, 11, 0.12);
  border-left-color: #f59e0b;
  color: #fde68a;
}

/* ---------- Preview ---------- */

.app-home .preview-rail {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: #e6e9ee;
  color-scheme: light;
}

.app-home .preview-toolbar {
  display: flex;
  flex: 0 0 54px;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 0 22px;
  background: #f6f7f9;
  border-bottom: 1px solid #d5dae2;
}

.app-home .preview-heading {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.app-home .preview-eyebrow {
  color: #6b7280;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.app-home .preview-summary {
  display: none !important;
}

.app-home .preview-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.app-home .page-summary {
  overflow: hidden;
  color: #6b7280;
  font-size: 10.5px;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-home .btn-answer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  padding: 0 12px;
  background: #ffffff;
  border: 1px solid #cbd2dc;
  border-radius: 6px;
  color: #334155;
  font-family: inherit;
  font-size: 10.5px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.app-home .btn-answer:hover:not(:disabled) {
  border-color: #93b4f8;
  color: #2563eb;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.app-home .btn-answer:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.app-home .preview-stage {
  position: relative;
  display: flex;
  flex: 1 1 auto;
  align-items: flex-start;
  justify-content: center;
  min-height: 0;
  padding: 22px;
  overflow: auto;
  background:
    radial-gradient(circle at 50% 0, rgba(255, 255, 255, 0.75), transparent 55%),
    #e6e9ee;
  scrollbar-gutter: stable;
}

.app-home .preview-stage::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}

.app-home .preview-stage::-webkit-scrollbar-thumb {
  background: #bcc4cf;
  border: 2px solid #e6e9ee;
  border-radius: 6px;
}

.app-home .preview-canvas {
  display: inline-block;
  flex: none;
}

.app-home .preview-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.app-home .preview-content .sheet {
  margin: 0 0 18px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.08),
    0 14px 40px rgba(15, 23, 42, 0.16);
}

.app-home .preview-content .sheet:last-child {
  margin-bottom: 0;
}

.app-home .preview-empty {
  width: min(520px, 100%);
  padding: 70px 30px;
  background: #ffffff;
  border: 1px dashed #c5ccd7;
  border-radius: 12px;
  box-shadow: 0 14px 40px rgba(15, 23, 42, 0.1);
  color: #6b7280;
  text-align: center;
}

.app-home .preview-empty__icon {
  margin-bottom: 12px;
  font-size: 30px;
  opacity: 0.45;
}

.app-home .preview-empty__text {
  margin: 0;
  color: #6b7280;
  font-size: 13px;
  line-height: 1.5;
}

/* ---------- Slim app footer ---------- */

.app-home .app-footer {
  display: flex;
  flex: 0 0 30px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  background: #212a36;
  border-top: 1px solid #364151;
  color: #7c8a9d;
  font-size: 9.5px;
}

.app-home .app-footer__links {
  display: flex;
  gap: 15px;
  min-width: 0;
}

.app-home .app-footer a {
  color: #93a2b5;
  white-space: nowrap;
}

.app-home .app-footer a:hover {
  color: #ffffff;
}

/* ---------- Responsive ---------- */

@media (max-width: 1199px) {
  .app-home .app-workspace {
    grid-template-columns: 540px minmax(0, 1fr);
  }

  .app-home .header-meta {
    display: none;
  }

  .app-home .control-rail {
    padding-left: 24px;
    padding-right: 20px;
  }
}

@media (max-width: 1099px) {
  body.app-home {
    height: auto;
    min-height: 100dvh;
    overflow-y: auto;
  }

  .app-home .site-header {
    position: sticky;
    top: 0;
    flex: none;
  }

  .app-home .app-main {
    flex: none;
  }

  .app-home .app-workspace {
    display: flex;
    flex-direction: column;
    height: auto;
  }

  .app-home .control-rail {
    padding: 18px;
    border-right: 0;
    border-bottom: 1px solid #364151;
  }

  .app-home .generator-form {
    max-width: 760px;
    margin: 0 auto;
  }

  .app-home .form-scroll {
    overflow: visible;
    padding-right: 0;
    margin-right: 0;
  }

  .app-home .control-dock {
    position: sticky;
    bottom: 0;
    z-index: 6;
    padding-bottom: 8px;
    background: var(--rail-bg);
    box-shadow: 0 -12px 22px rgba(43, 53, 68, 0.95);
  }

  .app-home .preview-rail {
    min-height: 78vh;
  }

  .app-home .preview-toolbar {
    flex: 0 0 auto;
    flex-wrap: wrap;
    min-height: 54px;
    padding: 10px 18px;
  }

  .app-home .preview-stage {
    overflow: visible;
    padding: 16px;
    scrollbar-gutter: auto;
  }

  .app-home .app-footer {
    display: none;
  }
}

@media (max-width: 600px) {
  .app-home .site-header__container {
    padding: 0 16px;
  }

  .app-home .control-rail {
    padding: 15px;
  }

  .app-home .rail-heading {
    margin-bottom: 11px;
  }

  .app-home .operation-card {
    padding: 6px 9px;
    font-size: 12px;
  }

  .app-home .field-group {
    margin-bottom: 13px;
  }

  .app-home #levels button {
    padding: 7px 0;
    font-size: 10.5px;
  }

  .app-home .page-summary {
    display: none;
  }

  .app-home .preview-toolbar {
    padding: 9px 12px;
  }

  .app-home .preview-stage {
    padding: 10px;
  }
}

/* ---------- Print ---------- */

@media print {
  body.app-home {
    display: block;
    height: auto;
    min-height: 0;
    overflow: visible;
    background: #ffffff;
    color: #000000;
  }

  .app-home .site-header,
  .app-home .mobile-menu,
  .app-home .control-rail,
  .app-home .preview-toolbar,
  .app-home .app-footer {
    display: none !important;
  }

  .app-home .app-main,
  .app-home .app-workspace,
  .app-home .preview-rail,
  .app-home .preview-stage,
  .app-home .preview-canvas,
  .app-home #preview {
    display: block !important;
    height: auto !important;
    min-height: 0 !important;
    max-height: none !important;
    overflow: visible !important;
    margin: 0 !important;
    padding: 0 !important;
    background: #ffffff !important;
    border: 0 !important;
    box-shadow: none !important;
    zoom: 1 !important;
  }

  .app-home .preview-content .sheet,
  .app-home .preview-content .sheet:last-child {
    margin: 0 auto !important;
    border: 0 !important;
    box-shadow: none !important;
    break-after: page;
    page-break-after: always;
  }

  .app-home .preview-content .sheet:last-child {
    break-after: auto;
    page-break-after: auto;
  }
}

/* ===========================================================
   Embedded generator on the original marketing homepage
   Keeps the page's light hero / cards / SEO flow intact and
   drops the dark two-pane workspace into the generator section.
   =========================================================== */

.generator-embed {
  --rail-bg: #2b3544;
  --rail-bg-deep: #202936;
  --rail-line: #3b4759;
  --rail-text: #c9d4e2;
  --rail-muted: #8b98aa;
  --rail-accent: #10b981;
  --rail-cta: #3b82f6;

  position: relative;
  margin: 0 0 var(--space-8);
  overflow: hidden;
  border-radius: 18px;
  background: var(--rail-bg);
  color: var(--rail-text);
  color-scheme: dark;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.18);
}

.generator-embed .app-workspace {
  /* Fill the first screen below the sticky header, leaving just a hint of
     the marketing content underneath. */
  height: clamp(620px, calc(100dvh - 120px), 800px);
}

.generator-embed .control-rail {
  border-right: 1px solid #1d2632;
}

.generator-embed .preview-rail {
  border-radius: 0 18px 18px 0;
}

/* ===========================================================
   Light, card-based controls for the embedded generator.
   White surfaces, hairline borders, red selection + red CTA,
   matching the clean reference UI.
   =========================================================== */

.generator-embed {
  --rail-bg: #ffffff;
  --rail-bg-deep: #ffffff;
  --rail-line: #e5e7eb;
  --rail-text: #111827;
  --rail-muted: #9ca3af;
  --rail-accent: #e60012;
  --rail-cta: #e60012;

  background: #ffffff;
  color: #111827;
  color-scheme: light;
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}

.generator-embed .control-rail {
  background: #ffffff;
  border-right: 1px solid #eceef1;
  border-bottom: 0;
}

.generator-embed .form-scroll {
  counter-reset: step;
  scrollbar-color: #d1d5db transparent;
}

.generator-embed .form-scroll::-webkit-scrollbar-thumb {
  background: #d1d5db;
}

.generator-embed .field-group {
  margin-bottom: 16px;
}

.generator-embed .field-group:last-child {
  margin-bottom: 4px;
}

.generator-embed .field-group__head {
  min-height: 20px;
  margin-bottom: 9px;
}

.generator-embed .field-label {
  display: flex;
  align-items: center;
  gap: 7px;
  color: #111827;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  text-transform: none;
  counter-increment: step;
}

.generator-embed .field-label::before {
  content: counter(step) ".";
  color: #111827;
  font-weight: 700;
}

.generator-embed .skill-meta {
  color: #9ca3af;
  font-size: 10.5px;
}

.generator-embed .mini-btn {
  padding: 4px 8px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  color: #6b7280;
  font-size: 10px;
}

.generator-embed .mini-btn:hover {
  border-color: #d1d5db;
  background: #fafafa;
  color: #111827;
}

/* Operation cards */

.generator-embed .operation-options {
  gap: 6px;
}

.generator-embed .operation-card {
  gap: 7px;
  padding: 8px 11px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  color: #374151;
  font-size: 12.5px;
  font-weight: 500;
  box-shadow: none;
}

.generator-embed .operation-card .op-symbol {
  width: 14px;
  color: #9ca3af;
}

.generator-embed .operation-card:hover:not(:disabled) {
  background: #fafafa;
  border-color: #d1d5db;
  color: #111827;
}

.generator-embed .operation-card[aria-pressed="true"] {
  background: #fff1f2;
  border-color: #e60012;
  color: #c8102e;
  box-shadow: 0 0 0 1px rgba(230, 0, 18, 0.06);
}

.generator-embed .operation-card[aria-pressed="true"] .op-symbol {
  color: #e60012;
}

.generator-embed .operation-card:disabled {
  opacity: 1;
  background: #fbfbfc;
  border-color: #eef0f3;
  color: #c4c7cc;
  box-shadow: none;
}

.generator-embed .operation-card:disabled .op-symbol {
  color: #c4c7cc;
}

/* Grade row */

.generator-embed #levels button {
  padding: 9px 0;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  color: #374151;
  font-size: 12px;
  font-weight: 600;
  box-shadow: none;
}

.generator-embed #levels button:hover:not(:disabled) {
  background: #fafafa;
  border-color: #d1d5db;
  color: #111827;
}

.generator-embed #levels button[aria-pressed="true"] {
  background: #fff1f2;
  border-color: #e60012;
  color: #c8102e;
  box-shadow: 0 0 0 1px rgba(230, 0, 18, 0.06);
}

.generator-embed #levels button:disabled {
  opacity: 1;
  background: #fbfbfc;
  border-color: #eef0f3;
  color: #c4c7cc;
}

/* Skills */

.generator-embed .topic-group__title {
  color: #9ca3af;
  font-size: 9px;
  letter-spacing: 0.08em;
}

.generator-embed .topic-group__list {
  gap: 6px;
}

.generator-embed .topic-item {
  position: relative;
  padding: 7px 10px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  color: #374151;
}

.generator-embed .topic-item:hover {
  background: #fafafa;
  border-color: #d1d5db;
}

.generator-embed .topic-item:has(input:checked) {
  background: #fff1f2;
  border-color: #e60012;
}

.generator-embed .topic-item:has(input:checked)::after {
  content: '✓';
  margin-left: 7px;
  color: #e60012;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}

.generator-embed .topic-item:has(input:focus-visible) {
  outline: 2px solid #e60012;
  outline-offset: 2px;
}

.generator-embed .topic-item__label {
  color: #374151;
  font-size: 12px;
}

.generator-embed .topic-item:has(input:checked) .topic-item__label {
  color: #c8102e;
}

.generator-embed .topic-item__checkbox {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
  opacity: 0;
}

/* Difficulty */

.generator-embed .difficulty-option {
  padding: 9px 4px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  color: #374151;
  font-size: 12px;
  font-weight: 600;
  box-shadow: none;
}

.generator-embed .difficulty-option:hover:not([aria-pressed="true"]) {
  background: #fafafa;
  border-color: #d1d5db;
  color: #111827;
}

.generator-embed .difficulty-option[aria-pressed="true"] {
  background: #e60012;
  border-color: #e60012;
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(230, 0, 18, 0.18);
}

/* Question count */

.generator-embed .count-presets button {
  padding: 4px 9px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  color: #6b7280;
  font-size: 10px;
}

.generator-embed .count-presets button:hover {
  border-color: #d1d5db;
  color: #111827;
}

.generator-embed .count-presets button[aria-pressed="true"] {
  background: #e60012;
  border-color: #e60012;
  color: #ffffff;
}

.generator-embed #count {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  color: #111827;
}

.generator-embed #count:focus {
  border-color: #e60012;
  box-shadow: 0 0 0 3px rgba(230, 0, 18, 0.1);
}

.generator-embed .number-arrows {
  border-left: 1px solid #e5e7eb;
}

.generator-embed .number-arrow-btn {
  background: #f9fafb;
  color: #6b7280;
}

.generator-embed .number-arrow-btn:first-child {
  border-bottom: 1px solid #e5e7eb;
}

.generator-embed .number-arrow-btn:hover {
  background: #f3f4f6;
  color: #111827;
}

.generator-embed .count-hint {
  color: #9ca3af;
}

/* Advanced options */

.generator-embed .advanced-settings {
  border-top: 1px solid #e5e7eb;
}

.generator-embed .advanced-settings summary {
  color: #6b7280;
}

.generator-embed .advanced-settings summary::before {
  color: #e60012;
}

.generator-embed .advanced-settings summary:hover {
  color: #111827;
}

.generator-embed .form-field label {
  color: #6b7280;
}

.generator-embed .form-field input,
.generator-embed .form-field select {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  color: #111827;
}

.generator-embed .form-field input:focus,
.generator-embed .form-field select:focus {
  border-color: #e60012;
  box-shadow: 0 0 0 2px rgba(230, 0, 18, 0.08);
}

.generator-embed .form-field input::placeholder {
  color: #9ca3af;
}

.generator-embed .checkbox-group label {
  color: #4b5563;
}

.generator-embed .checkbox-group input[type="checkbox"] {
  accent-color: #e60012;
}

/* Bottom actions */

.generator-embed .control-dock {
  background: #ffffff;
  border-top: 1px solid #e5e7eb;
}

.generator-embed .btn-generate {
  background: #e60012;
  color: #ffffff;
  border-radius: 8px;
  box-shadow: 0 6px 16px rgba(230, 0, 18, 0.2);
}

.generator-embed .btn-generate:hover {
  background: #c8102e;
  box-shadow: 0 8px 20px rgba(200, 16, 46, 0.26);
}

.generator-embed .btn-reset {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  color: #6b7280;
  border-radius: 8px;
}

.generator-embed .btn-reset:hover {
  background: #fff5f5;
  border-color: #fca5a5;
  color: #e60012;
}

.generator-embed .dock-secondary button {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  color: #4b5563;
}

.generator-embed .dock-secondary button:hover:not(:disabled) {
  background: #fafafa;
  border-color: #d1d5db;
  color: #111827;
}

.generator-embed .dock-secondary button:disabled {
  opacity: 1;
  background: #fbfbfc;
  border-color: #eef0f3;
  color: #c4c7cc;
}

.generator-embed .control-dock .status {
  background: #fff5f5;
  border-left: 2px solid #e60012;
  color: #7f1d1d;
}

.generator-embed .control-dock .status.error {
  background: #fef2f2;
  border-left-color: #dc2626;
  color: #991b1b;
}

.generator-embed .control-dock .status.notice {
  background: #fffbeb;
  border-left-color: #f59e0b;
  color: #92400e;
}

/* Preview */

.generator-embed .preview-rail {
  background: #f7f7f8;
}

.generator-embed .preview-toolbar {
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.generator-embed .preview-eyebrow {
  color: #9ca3af;
}

.generator-embed .page-summary {
  color: #6b7280;
}

.generator-embed .btn-answer {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 7px;
  color: #374151;
}

.generator-embed .btn-answer:hover:not(:disabled) {
  background: #fff5f5;
  border-color: #fca5a5;
  color: #e60012;
  box-shadow: none;
}

.generator-embed .btn-answer:disabled {
  opacity: 1;
  background: #fbfbfc;
  border-color: #eef0f3;
  color: #c4c7cc;
}

.generator-embed .preview-stage {
  background:
    radial-gradient(circle at 50% 0, rgba(255, 255, 255, 0.9), transparent 58%),
    #f3f4f6;
}

.generator-embed .preview-stage::-webkit-scrollbar-thumb {
  background: #d1d5db;
  border-color: #f3f4f6;
}

.generator-embed .preview-content .sheet {
  border: 1px solid #e5e7eb;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.generator-embed .preview-empty {
  background: #ffffff;
  border: 1px dashed #d1d5db;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  color: #6b7280;
}

.generator-embed .preview-empty__text {
  color: #6b7280;
}

@media (max-width: 1099px) {
  .generator-embed .control-rail {
    border-right: 0;
    border-bottom: 1px solid #e5e7eb;
  }

  .generator-embed .control-dock {
    background: #ffffff;
  }
}

@media (max-width: 1099px) {
  .generator-embed {
    border-radius: 14px;
  }

  .generator-embed .app-workspace {
    height: auto;
  }

  .generator-embed .preview-rail {
    min-height: 520px;
    border-radius: 0 0 14px 14px;
  }

  .generator-embed .control-dock {
    position: static;
    box-shadow: none;
  }
}

@media (max-width: 600px) {
  .generator-embed {
    border-radius: 12px;
    margin-bottom: var(--space-6);
  }
}

@media print {
  /* The original print rule hides #generator's first div, which used to be
     the section heading. Now the panel itself is first, so restore it. */
  #generator > div.generator-embed {
    display: block !important;
  }

  .generator-embed {
    margin: 0 !important;
    overflow: visible !important;
    border-radius: 0 !important;
    background: #ffffff !important;
    box-shadow: none !important;
  }

  .generator-embed .app-workspace {
    display: block !important;
    height: auto !important;
  }

  .generator-embed .preview-rail {
    min-height: 0 !important;
    border-radius: 0 !important;
  }
}

/* Let the embedded rail breathe evenly instead of leaving one large void
   above the bottom action bar. Sections keep their natural height and the
   leftover space is distributed between them. */
.generator-embed .form-scroll {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.generator-embed .form-scroll > .field-group {
  flex: none;
}

#generator { scroll-margin-top: 5rem; }



/* Comfortable scale for the light control rail. */
.generator-embed .control-rail {
  padding: 24px 28px 20px 30px;
}

.generator-embed .field-label {
  gap: 8px;
  font-size: 17px;
}

.generator-embed .field-label::before {
  font-size: 17px;
}

.generator-embed .field-group {
  margin-bottom: 20px;
}

.generator-embed .field-group__head {
  min-height: 22px;
  margin-bottom: 11px;
}

.generator-embed .skill-meta {
  font-size: 11.5px;
}

.generator-embed .mini-btn {
  padding: 5px 10px;
  font-size: 11.5px;
}

.generator-embed .operation-card {
  gap: 8px;
  padding: 10px 14px;
  border-radius: 9px;
  font-size: 14.5px;
}

.generator-embed .operation-card .op-symbol {
  width: 16px;
  font-size: 15px;
}

.generator-embed #levels button {
  padding: 11px 0;
  border-radius: 9px;
  font-size: 14px;
}

.generator-embed .topic-group__title {
  font-size: 10px;
}

.generator-embed .topic-item {
  padding: 9px 12px;
  border-radius: 9px;
}

.generator-embed .topic-item__label {
  font-size: 14px;
}

.generator-embed .topic-item:has(input:checked)::after {
  font-size: 14px;
}

.generator-embed .difficulty-option {
  padding: 11px 4px;
  border-radius: 9px;
  font-size: 14.5px;
}

.generator-embed .count-presets button {
  padding: 5px 10px;
  font-size: 11.5px;
}

.generator-embed #count {
  height: 38px;
  padding-left: 13px;
  font-size: 15px;
}

.generator-embed .number-arrows {
  width: 30px;
}

.generator-embed .number-arrow-btn {
  font-size: 8px;
}

.generator-embed .count-hint {
  font-size: 12px;
}

.generator-embed .advanced-settings summary {
  font-size: 12.5px;
}

.generator-embed .form-field label {
  font-size: 10.5px;
}

.generator-embed .form-field input,
.generator-embed .form-field select {
  height: 36px;
  padding: 0 10px;
  font-size: 13.5px;
}

.generator-embed .checkbox-group label {
  font-size: 12.5px;
}

.generator-embed .checkbox-group input[type="checkbox"] {
  width: 15px;
  height: 15px;
}

.generator-embed .btn-generate {
  height: 48px;
  border-radius: 9px;
  font-size: 16px;
}

.generator-embed .btn-generate svg {
  width: 18px;
  height: 18px;
}

.generator-embed .btn-reset {
  width: 48px;
  height: 48px;
  border-radius: 9px;
  font-size: 19px;
}

.generator-embed .dock-secondary button {
  height: 34px;
  border-radius: 7px;
  font-size: 12.5px;
}

.generator-embed .preview-toolbar {
  padding: 0 26px;
}

.generator-embed .preview-eyebrow {
  font-size: 11px;
}

.generator-embed .page-summary {
  font-size: 12px;
}

.generator-embed .btn-answer {
  height: 34px;
  padding: 0 14px;
  font-size: 12.5px;
}

.generator-embed .preview-stage {
  padding: 24px;
}

@media (max-width: 600px) {
  .generator-embed .control-rail {
    padding: 18px;
  }

  .generator-embed .field-label,
  .generator-embed .field-label::before {
    font-size: 16px;
  }

  .generator-embed .field-group {
    margin-bottom: 16px;
  }

  .generator-embed .operation-card {
    padding: 9px 11px;
    font-size: 13px;
  }

  .generator-embed #levels button {
    padding: 10px 0;
    font-size: 12.5px;
  }

  .generator-embed .topic-item__label {
    font-size: 13px;
  }

  .generator-embed .difficulty-option {
    font-size: 13.5px;
  }

  .generator-embed .btn-generate {
    height: 46px;
    font-size: 15px;
  }

  .generator-embed .btn-reset {
    width: 46px;
    height: 46px;
  }

  .generator-embed .dock-secondary button {
    height: 32px;
    font-size: 12px;
  }

  .generator-embed .preview-toolbar {
    flex-wrap: wrap;
    padding: 10px 14px;
  }

  .generator-embed .preview-stage {
    padding: 12px;
  }
}

/* One more comfortable step up: larger type and frames. */
.generator-embed .app-workspace {
  height: clamp(640px, calc(100dvh - 108px), 820px);
}

.generator-embed .control-rail {
  padding: 26px 30px 22px 32px;
}

.generator-embed .field-label {
  gap: 9px;
  font-size: 18px;
}

.generator-embed .field-label::before {
  font-size: 18px;
}

.generator-embed .field-group {
  margin-bottom: 22px;
}

.generator-embed .field-group__head {
  min-height: 24px;
  margin-bottom: 12px;
}

.generator-embed .skill-meta {
  font-size: 12.5px;
}

.generator-embed .mini-btn {
  padding: 6px 11px;
  font-size: 12.5px;
}

.generator-embed .operation-card {
  gap: 7px;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 15.5px;
}

.generator-embed .operation-card .op-symbol {
  width: 17px;
  font-size: 16px;
}

.generator-embed #levels button {
  padding: 12px 0;
  border-radius: 10px;
  font-size: 15px;
}

.generator-embed .topic-group__title {
  font-size: 10.5px;
}

.generator-embed .topic-item {
  padding: 10px 12px;
  border-radius: 10px;
}

.generator-embed .topic-item__label {
  font-size: 15px;
}

.generator-embed .topic-item:has(input:checked)::after {
  font-size: 15px;
}

.generator-embed .difficulty-option {
  padding: 12px 4px;
  border-radius: 10px;
  font-size: 15.5px;
}

.generator-embed .count-presets button {
  padding: 6px 11px;
  font-size: 12.5px;
}

.generator-embed #count {
  height: 42px;
  padding-left: 14px;
  font-size: 16px;
}

.generator-embed .number-arrows {
  width: 32px;
}

.generator-embed .count-hint {
  font-size: 13px;
}

.generator-embed .advanced-settings summary {
  font-size: 13.5px;
}

.generator-embed .form-field label {
  font-size: 11px;
}

.generator-embed .form-field input,
.generator-embed .form-field select {
  height: 38px;
  padding: 0 11px;
  font-size: 14px;
}

.generator-embed .checkbox-group label {
  font-size: 13px;
}

.generator-embed .checkbox-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
}

.generator-embed .btn-generate {
  height: 52px;
  border-radius: 10px;
  font-size: 17px;
}

.generator-embed .btn-generate svg {
  width: 20px;
  height: 20px;
}

.generator-embed .btn-reset {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  font-size: 21px;
}

.generator-embed .dock-secondary button {
  height: 38px;
  border-radius: 8px;
  font-size: 13.5px;
}

.generator-embed .preview-toolbar {
  padding: 0 28px;
}

.generator-embed .preview-eyebrow {
  font-size: 12px;
}

.generator-embed .page-summary {
  font-size: 13px;
}

.generator-embed .btn-answer {
  height: 38px;
  padding: 0 16px;
  font-size: 13.5px;
}

.generator-embed .btn-icon {
  flex: none;
  width: 38px;
  padding: 0;
}

.generator-embed .btn-icon svg {
  width: 18px;
  height: 18px;
}

.generator-embed .page-select {
  width: auto;
  min-width: 110px;
  height: 38px;
  padding: 0 28px 0 11px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 7px;
  color: #374151;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
}

.generator-embed .page-select:focus {
  outline: none;
  border-color: #e60012;
  box-shadow: 0 0 0 3px rgba(230, 0, 18, 0.1);
}

.generator-embed .page-select[hidden] {
  display: none !important;
}

.generator-embed #preview .sheet[hidden] {
  display: none !important;
}

@media print {
  .generator-embed #preview .sheet[hidden] {
    display: flex !important;
  }
}

.generator-embed .preview-stage {
  padding: 26px;
}

@media (max-width: 600px) {
  .generator-embed .control-rail {
    padding: 20px;
  }

  .generator-embed .field-label,
  .generator-embed .field-label::before {
    font-size: 17px;
  }

  .generator-embed .field-group {
    margin-bottom: 18px;
  }

  .generator-embed .operation-card {
    padding: 9px 10px;
    font-size: 14px;
  }

  .generator-embed #levels button {
    padding: 11px 0;
    font-size: 13.5px;
  }

  .generator-embed .topic-item__label {
    font-size: 14px;
  }

  .generator-embed .difficulty-option {
    font-size: 14.5px;
  }

  .generator-embed .btn-generate {
    height: 50px;
    font-size: 16px;
  }

  .generator-embed .btn-reset {
    width: 50px;
    height: 50px;
  }

  .generator-embed .dock-secondary button {
    height: 36px;
    font-size: 13px;
  }

  .generator-embed .preview-toolbar {
    padding: 10px 16px;
  }

  .generator-embed .preview-stage {
    padding: 14px;
  }
}

/* With the larger type, let the generator module grow naturally instead of
   clipping the last control row inside a fixed-height rail. */
.generator-embed .app-workspace {
  height: auto;
  min-height: 700px;
}

.generator-embed .generator-form {
  height: auto;
}

.generator-embed .form-scroll {
  flex: none;
  overflow: visible;
}

.generator-embed .control-dock {
  position: static;
  margin-top: 10px;
}

.generator-embed .preview-rail {
  min-height: 700px;
}

/* Keep the bigger type comfortable without pushing the primary action below
   the first screen on common laptop heights. */
.generator-embed .control-rail {
  padding: 22px 30px 18px 32px;
}

.generator-embed .field-group {
  margin-bottom: 14px;
}

.generator-embed .field-group__head {
  min-height: 22px;
  margin-bottom: 9px;
}

.generator-embed .operation-card {
  padding: 9px 12px;
}

.generator-embed #levels button {
  padding: 11px 0;
}

.generator-embed .topic-item {
  padding: 9px 12px;
}

.generator-embed .difficulty-option {
  padding: 11px 4px;
}

.generator-embed #count {
  height: 40px;
}

.generator-embed .btn-generate {
  height: 50px;
}

.generator-embed .btn-reset {
  width: 50px;
  height: 50px;
}

.generator-embed .dock-secondary {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.generator-embed .dock-secondary button {
  height: 36px;
}

@media (max-width: 600px) {
  .generator-embed .control-rail {
    padding: 18px;
  }

  .generator-embed .field-group {
    margin-bottom: 15px;
  }
}

/* Compact page intro above the generator (replaces the old hero block). */
.page-intro {
  max-width: 58rem;
  margin: 0 auto 30px;
  padding: 2px 0 0;
  text-align: center;
}

.page-intro__title {
  margin: 0 0 12px;
  color: var(--text-primary);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-intro__description {
  max-width: 48rem;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: var(--text-xl);
  line-height: 1.6;
}

@media (max-width: 640px) {
  .page-intro {
    margin-bottom: 22px;
    text-align: left;
  }

  .page-intro__title {
    font-size: var(--text-3xl);
  }

  .page-intro__description {
    font-size: var(--text-lg);
  }
}

@media print { .page-intro { display: none !important; } }

/* On tablet/mobile the 816px paper must not widen the page itself. Keep the
   flex children shrinkable and let the preview's zoom fit the paper to the
   available pane instead of creating page-level horizontal scrolling. */
@media (max-width: 1099px) {
  body.app-home {
    overflow-x: hidden;
  }

  .app-home .control-rail,
  .app-home .preview-rail,
  .app-home .preview-stage {
    min-width: 0;
  }

  .app-home .preview-stage {
    overflow-x: hidden;
    overflow-y: visible;
  }
}

@media (max-width: 600px) {
  .app-home .grade-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .app-home .field-group__head {
    flex-wrap: wrap;
  }

  .app-home .field-group__head .field-label {
    flex-shrink: 0;
    white-space: nowrap;
  }

  .app-home .preview-stage {
    overflow-x: auto;
    justify-content: flex-start;
  }
}

/* Small, consistent line icons for the export row. */
.app-home .dock-secondary .dock-icon {
  display: block;
  flex: none;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.generator-embed .dock-secondary button {
  gap: 6px;
}

.generator-embed .dock-secondary .dock-icon {
  width: 17px;
  height: 17px;
}