/* ==========================================================================
   M02 คอร์สและบทเรียน — CRS-01 list · CRS-02/03 wizard · CRS-05 curriculum builder
   + shared M02 dialogs (preview, impact, validation summary). Classes prefixed .m02-.
   Colours/sizes from tokens only (READVPN-DESIGN-SYSTEM.md §2, §5, §9).
   ========================================================================== */

/* ---------------------------------------------------------------- shared bits */
.m02-code { font-variant-numeric: tabular-nums; white-space: nowrap; font-weight: 500; }
.m02-num { text-align: right; font-variant-numeric: tabular-nums; }
.m02-ver { display: inline-flex; align-items: center; min-height: 22px; padding: 0 8px; border-radius: var(--rv-radius-pill); background: var(--rv-neutral-100); color: var(--rv-neutral-700); font-size: 12px; line-height: 18px; }
.m02-bullets { margin: 8px 0 0; padding-left: 18px; font-size: 13px; line-height: 20px; display: flex; flex-direction: column; gap: 4px; }
.m02-counts { display: grid; grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); gap: 8px; }
.m02-counts--sm { grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); gap: 6px; margin-top: 4px; }
.m02-count-tile { display: flex; flex-direction: column; gap: 2px; padding: 8px 10px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface-subtle); min-width: 0; }
.m02-count-tile__v { font-size: var(--rv-fs-stat-sm); line-height: var(--rv-lh-stat-sm); font-weight: 500; font-variant-numeric: tabular-nums; color: var(--rv-text-primary); }
.m02-counts--sm .m02-count-tile { padding: 6px 8px; }
.m02-counts--sm .m02-count-tile__v { font-size: 16px; line-height: 22px; }
.m02-count-tile__l { font-size: 12px; line-height: 18px; color: var(--rv-text-secondary); }
.m02-count-tile.is-warn { border-color: var(--rv-warning-border); background: var(--rv-warning-bg); }
.m02-count-tile.is-warn .m02-count-tile__v { color: var(--rv-warning); }

/* ---------------------------------------------------------------- CRS-01 list */
.m02-courses__tabs { min-width: 0; }
.m02-sum .rv-stat { min-width: 0; }
.m02-price { font-variant-numeric: tabular-nums; font-weight: 500; }
.m02-price__list { display: block; font-size: 12px; line-height: 18px; color: var(--rv-text-muted); font-variant-numeric: tabular-nums; }
.m02-numlink { font-variant-numeric: tabular-nums; font-weight: 500; }
.m02-access { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 2px; }
.m02-inslist { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.m02-insname { display: block; font-size: 12px; line-height: 18px; max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.m02-more { align-self: flex-start; display: inline-flex; align-items: center; min-height: 20px; padding: 0 6px; border-radius: var(--rv-radius-pill); background: var(--rv-neutral-100); color: var(--rv-neutral-700); font-size: 12px; cursor: help; }

/* ---------------------------------------------------------------- CRS-02/03 wizard */
.m02-wiz { display: flex; flex-direction: column; gap: var(--rv-space-4); min-width: 0; }
.m02-stepper__list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 4px; counter-reset: none; }
.m02-step { position: relative; min-width: 0; }
.m02-step:not(:last-child)::after { content: ""; position: absolute; top: 22px; right: -4px; width: 8px; height: 1px; background: var(--rv-neutral-300); }
.m02-step__btn { width: 100%; min-height: 44px; display: flex; align-items: center; gap: 8px; padding: 6px 10px; border: 1px solid var(--rv-border); border-radius: var(--rv-radius-card);
  background: var(--rv-surface); color: var(--rv-text-secondary); font-size: 13px; line-height: 18px; text-align: left; transition: background-color var(--rv-motion-fast), border-color var(--rv-motion-fast); }
.m02-step__btn:hover:not(:disabled) { border-color: var(--rv-primary-600); background: var(--rv-primary-50); }
.m02-step__btn:disabled { cursor: not-allowed; opacity: .6; }
.m02-step__num { flex: 0 0 auto; width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%;
  background: var(--rv-neutral-100); color: var(--rv-neutral-700); font-size: 12px; font-weight: 600; font-variant-numeric: tabular-nums; }
.m02-step__label { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.m02-step__warn { flex: 0 0 auto; min-width: 20px; height: 20px; padding: 0 6px; display: inline-flex; align-items: center; justify-content: center; border-radius: var(--rv-radius-pill);
  background: var(--rv-warning-bg); color: var(--rv-warning); border: 1px solid var(--rv-warning-border); font-size: 11px; font-weight: 600; }
.m02-step.is-current .m02-step__btn { border-color: var(--rv-primary-700); background: var(--rv-primary-50); color: var(--rv-primary-900); font-weight: 600; box-shadow: inset 0 -2px 0 var(--rv-primary-700); }
.m02-step.is-current .m02-step__num { background: var(--rv-primary-700); color: #fff; }
.m02-step.is-done .m02-step__num { background: var(--rv-success-bg); color: var(--rv-success); }
.m02-step.is-done .m02-step__btn { color: var(--rv-text-primary); }
.m02-step.is-error .m02-step__num { background: var(--rv-warning-bg); color: var(--rv-warning); }
.m02-stepm { display: none; }
.m02-stepm__btn { width: 100%; min-height: 44px; display: flex; align-items: center; gap: 8px; padding: 8px 12px; border: 1px solid var(--rv-border); border-radius: var(--rv-radius-card); background: var(--rv-surface); text-align: left; }
.m02-stepm__count { font-size: 12px; color: var(--rv-text-muted); white-space: nowrap; }
.m02-stepm__label { flex: 1 1 auto; min-width: 0; font-size: 14px; font-weight: 600; color: var(--rv-primary-900); }
.m02-stepm__bar { height: 4px; margin-top: 6px; background: var(--rv-neutral-200); border-radius: var(--rv-radius-pill); overflow: hidden; }
.m02-stepm__bar > span { display: block; height: 100%; background: var(--rv-primary-700); border-radius: inherit; }

.m02-wiz__panel { display: flex; flex-direction: column; gap: var(--rv-space-4); min-width: 0; }
.m02-wiz__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 16px; }
.m02-wiz__title { margin: 0; font-size: var(--rv-fs-section); line-height: var(--rv-lh-section); font-weight: 500; outline: none; }
.m02-wiz__title:focus-visible { outline: 2px solid var(--rv-focus); outline-offset: 2px; }
.m02-ro { border: 0; margin: 0; padding: 0; min-width: 0; display: flex; flex-direction: column; gap: var(--rv-space-4); }
.m02-sect { min-width: 0; }
.m02-grid { align-items: start; }
.m02-field { min-width: 0; }
.m02-field.is-invalid .rv-input, .m02-field.is-invalid .rv-select, .m02-field.is-invalid .rv-textarea, .m02-field.is-invalid .m02-rte,
.m02-dfield.is-invalid .rv-input, .m02-dfield.is-invalid .rv-select, .m02-dfield.is-invalid .rv-textarea { border-color: var(--rv-danger); }
.m02-field.is-invalid > .rv-field__label, .m02-field.is-invalid > legend, .m02-dfield.is-invalid > .rv-field__label { color: var(--rv-danger); }
.m02-field .rv-field__error, .m02-dfield .rv-field__error { color: var(--rv-danger); font-size: 12px; line-height: 18px; margin: 2px 0 0; }
fieldset.m02-field { border: 0; margin: 0; padding: 0; min-width: 0; }
fieldset.m02-field > legend { padding: 0; margin-bottom: 4px; }
.m02-igroup { display: flex; align-items: stretch; min-width: 0; }
.m02-igroup > .rv-input { flex: 1 1 auto; min-width: 0; }
.m02-igroup > .rv-input:not(:first-child) { border-top-left-radius: 0; border-bottom-left-radius: 0; }
.m02-igroup > .rv-input:not(:last-child) { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.m02-igroup__addon { flex: 0 0 auto; display: inline-flex; align-items: center; padding: 0 10px; border: 1px solid var(--rv-control-border); background: var(--rv-neutral-50);
  color: var(--rv-text-secondary); font-size: 12px; white-space: nowrap; }
.m02-igroup__addon:first-child { border-right: 0; border-radius: var(--rv-radius-control) 0 0 var(--rv-radius-control); }
.m02-igroup__addon:last-child { border-left: 0; border-radius: 0 var(--rv-radius-control) var(--rv-radius-control) 0; }
.m02-count { align-self: flex-end; font-size: 11px; line-height: 16px; color: var(--rv-text-muted); font-variant-numeric: tabular-nums; }
.m02-inline-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 4px; }
.m02-inline-note { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.m02-readonly { min-height: 32px; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; padding: 5px 12px; border: 1px dashed var(--rv-border); border-radius: var(--rv-radius-control);
  background: var(--rv-surface-subtle); font-size: 13px; line-height: 20px; user-select: text; }
.m02-switch { display: inline-flex; align-items: center; gap: 8px; min-height: 32px; cursor: pointer; font-size: 13px; line-height: 20px; }
.m02-switch--sm { font-size: 12px; min-height: 28px; }
.m02-switch__state { font-size: 12px; color: var(--rv-text-muted); }
.m02-radios__row, .m02-checks__row { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.m02-checks--chips .m02-checks__row { gap: 8px; }
.m02-chipcheck { position: relative; display: inline-flex; align-items: center; gap: 6px; min-height: 32px; padding: 4px 12px; border: 1px solid var(--rv-border); border-radius: var(--rv-radius-pill);
  background: var(--rv-surface); font-size: 12px; cursor: pointer; }
.m02-chipcheck input { width: 14px; height: 14px; margin: 0; accent-color: var(--rv-primary-700); flex: 0 0 auto; }
.m02-chipcheck:has(input:checked) { background: var(--rv-primary-50); border-color: var(--rv-primary-700); color: var(--rv-primary-900); font-weight: 500; }
.m02-chipcheck:has(input:focus-visible) { outline: 2px solid var(--rv-focus); outline-offset: 2px; }
.m02-chipcheck.is-muted { color: var(--rv-text-muted); }

/* rich text */
.m02-rte { border: 1px solid var(--rv-control-border); border-radius: var(--rv-radius-control); background: var(--rv-surface); overflow: hidden; }
.m02-rte:focus-within { border-color: var(--rv-primary-700); outline: 2px solid var(--rv-focus); outline-offset: 2px; }
.m02-rte__bar { display: flex; flex-wrap: wrap; gap: 2px; padding: 4px; background: var(--rv-neutral-50); border-bottom: 1px solid var(--rv-divider); }
.m02-rte__btn { width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: var(--rv-radius-control); background: transparent; color: var(--rv-neutral-700); }
.m02-rte__btn:hover:not(:disabled) { background: var(--rv-neutral-200); color: var(--rv-primary-800); }
.m02-rte__body { min-height: 180px; max-height: 480px; overflow-y: auto; padding: 12px; font: 400 14px/22px var(--rv-font-family); color: var(--rv-text-primary); outline: none; }
.m02-rte__body:empty::before { content: "พิมพ์รายละเอียดคอร์ส…"; color: var(--rv-text-muted); }
.m02-rte__body h2, .m02-rte__body h3, .m02-rte__body h4 { margin: 12px 0 6px; font-size: 16px; line-height: 24px; font-weight: 600; }
.m02-rte__body p { margin: 0 0 8px; }
.m02-rte__body ul, .m02-rte__body ol { margin: 0 0 8px; padding-left: 22px; }
.m02-rte__body img { max-width: 100%; height: auto; border-radius: var(--rv-radius-card); }
.m02-rte.is-readonly { background: var(--rv-surface-subtle); }

/* cover picker */
.m02-cover__row { display: flex; flex-wrap: wrap; gap: 12px 16px; align-items: flex-start; }
.m02-cover__preview { flex: 0 0 auto; }
.m02-cover__empty { width: 160px; height: 90px; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; border: 1px dashed var(--rv-neutral-400);
  border-radius: var(--rv-radius-card); background: var(--rv-neutral-50); color: var(--rv-text-muted); font-size: 12px; }
.m02-cover__side { flex: 1 1 240px; min-width: 0; display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.m02-cover__side > .rv-field { width: 100%; }
.m02-cover__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: 8px; margin-top: 10px; }
.m02-thumbpick { position: relative; display: block; border: 2px solid transparent; border-radius: var(--rv-radius-card); overflow: hidden; cursor: pointer; aspect-ratio: 16 / 9; background: var(--rv-neutral-100); }
.m02-thumbpick input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; }
.m02-thumbpick img { width: 100%; height: 100%; object-fit: cover; display: block; }
.m02-thumbpick:hover { border-color: var(--rv-primary-300); }
.m02-thumbpick.is-selected, .m02-thumbpick:has(input:checked) { border-color: var(--rv-primary-700); box-shadow: 0 0 0 2px var(--rv-primary-100); }
.m02-thumbpick:has(input:focus-visible) { outline: 2px solid var(--rv-focus); outline-offset: 2px; }
.m02-upload { position: relative; cursor: pointer; }
.m02-upload__input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; font-size: 0; }
.m02-upload:focus-within { outline: 2px solid var(--rv-focus); outline-offset: 2px; }

/* instructors, repeatable lists, extra sections */
.m02-ins { list-style: none; margin: 0 0 8px; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.m02-ins__row { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface); min-width: 0; }
.m02-ins__who { flex: 1 1 200px; min-width: 0; }
.m02-ins__name { font-size: 13px; line-height: 20px; font-weight: 500; overflow-wrap: anywhere; }
.m02-ins__role { flex: 1 1 200px; min-width: 0; }
.m02-ins__add { max-width: 420px; }
.m02-ins__empty { margin: 0 0 8px; }
.m02-rowbtns { display: inline-flex; flex: 0 0 auto; gap: 2px; }
.m02-list { list-style: none; margin: 0 0 8px; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.m02-list__row { display: flex; align-items: center; gap: 8px; min-width: 0; }
.m02-list__row > .rv-input { flex: 1 1 auto; min-width: 0; }
.m02-list__no { flex: 0 0 24px; text-align: right; font-size: 12px; color: var(--rv-text-muted); font-variant-numeric: tabular-nums; }
.m02-xs { list-style: none; margin: 0 0 8px; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.m02-xs__item { display: flex; flex-direction: column; gap: 8px; padding: 12px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface-subtle); }
.m02-xs__head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.m02-rel__search { margin-bottom: 8px; max-width: 420px; }
.m02-rel { max-height: 320px; overflow-y: auto; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); }
.m02-rel__item { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-bottom: 1px solid var(--rv-divider); cursor: pointer; min-height: 44px; }
.m02-rel__item:last-child { border-bottom: 0; }
.m02-rel__item:hover { background: var(--rv-row-hover); }
.m02-rel__item:has(input:checked) { background: var(--rv-selected-bg); }
.m02-rel__item input { width: 16px; height: 16px; flex: 0 0 auto; accent-color: var(--rv-primary-700); }
.m02-rel__text { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; }
.m02-rel__title { font-size: 13px; line-height: 20px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* pricing / completion */
.m02-pricebox { display: flex; flex-direction: column; gap: 2px; padding: 12px 16px; border: 1px solid var(--rv-primary-200); border-radius: var(--rv-radius-card); background: var(--rv-primary-50); }
.m02-pricebox__label { font-size: 12px; color: var(--rv-primary-900); }
.m02-pricebox__value { font-size: var(--rv-fs-stat); line-height: var(--rv-lh-stat); font-weight: 500; font-variant-numeric: tabular-nums; color: var(--rv-primary-900); }
.m02-asmgroup { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.m02-asmgroup__title { font-size: 13px; font-weight: 600; color: var(--rv-text-primary); }
.m02-asm { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; min-height: 32px; font-size: 13px; }
.m02-certlink { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.m02-outline { margin: 12px 0 0; padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
.m02-outline__no { display: inline-block; min-width: 72px; color: var(--rv-text-muted); font-size: 12px; }

/* validation summary (step 6 + issues dialog) */
.m02-vsum { display: flex; flex-direction: column; gap: 12px; }
.m02-vsum__status { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 13px; }
.m02-vsum__group { display: flex; flex-direction: column; gap: 4px; }
.m02-vsum__step { font-size: 12px; font-weight: 600; color: var(--rv-text-secondary); }
.m02-vsum__group > ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.m02-vsum__item { display: flex; align-items: flex-start; gap: 8px; padding: 4px 0; font-size: 13px; line-height: 20px; }
.m02-vsum__item > .rv-icon, .m02-vsum__item > svg { flex: 0 0 auto; margin-top: 2px; }
.m02-vsum__item.is-invalid > svg, .m02-vsum__item.is-invalid > .rv-icon { color: var(--rv-danger); }
.m02-vsum__item.is-required > svg, .m02-vsum__item.is-required > .rv-icon { color: var(--rv-warning); }
.m02-vsum__item.is-warning > svg, .m02-vsum__item.is-warning > .rv-icon { color: var(--rv-info); }
.m02-vsum__link { padding: 0; border: 0; background: none; color: var(--rv-link); text-align: left; font: inherit; cursor: pointer; text-decoration: underline; text-underline-offset: 2px; }
.m02-vsum__link:hover { color: var(--rv-link-hover); }
.m02-vsum__warn { padding-top: 8px; border-top: 1px solid var(--rv-divider); }

/* sticky action bar (above the 56px bottom nav on mobile) */
.m02-actions { position: sticky; bottom: 0; z-index: var(--rv-z-sticky); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 12px;
  margin-top: var(--rv-space-2); padding: 12px 0; background: var(--rv-surface); border-top: 1px solid var(--rv-divider); }
.m02-actions__left, .m02-actions__right { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.m02-actions__right { justify-content: flex-end; margin-left: auto; }
.m02-dirty { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--rv-warning); }
.m02-dirty:empty { display: none; }

/* ---------------------------------------------------------------- CRS-05 builder */
.m02-chead { align-items: center; }
.m02-chead .rv-dhead__title { font-size: 18px; line-height: 26px; }
.m02-rbar { position: sticky; top: calc(var(--rv-header-height) + 8px); z-index: var(--rv-z-sticky); display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; padding: 10px 14px;
  border: 1px solid var(--rv-warning-border); border-radius: var(--rv-radius-card); background: var(--rv-warning-bg); color: var(--rv-warning); box-shadow: var(--rv-shadow-popover); }
.m02-rbar__text { flex: 1 1 200px; color: var(--rv-neutral-800); font-size: 13px; }
.m02-tree__tools { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.m02-tree, .m02-items { list-style: none; margin: 0; padding: 0; }
.m02-tree { display: flex; flex-direction: column; gap: 12px; }
.m02-sec { border: 1px solid var(--rv-card-border); border-radius: var(--rv-radius-card); background: var(--rv-surface); min-width: 0; }
.m02-sec__head { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; padding: 8px 10px; background: var(--rv-neutral-50); border-bottom: 1px solid var(--rv-divider);
  border-radius: var(--rv-radius-card) var(--rv-radius-card) 0 0; }
.m02-sec__toggle { width: 32px; height: 32px; flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: var(--rv-radius-control); background: transparent; color: var(--rv-neutral-700); }
.m02-sec__toggle:hover { background: var(--rv-neutral-200); }
.m02-sec__title { flex: 1 1 240px; min-width: 0; font-size: 14px; line-height: 22px; overflow-wrap: anywhere; }
.m02-sec__title > .rv-small, .m02-ch__title > .rv-small { white-space: nowrap; } /* keep “· 3 บทเรียน” on one line */
.m02-sec__no { display: inline-block; margin-right: 4px; padding: 0 6px; border-radius: var(--rv-radius-pill); background: var(--rv-primary-50); color: var(--rv-primary-900); font-size: 12px; font-weight: 600; }
.m02-items { display: flex; flex-direction: column; }
.m02-sec > .m02-items { padding: 6px; gap: 4px; }
.m02-ch { margin: 2px 0; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface-subtle); }
.m02-ch__head { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; padding: 6px 8px; }
.m02-ch__icon { color: var(--rv-primary-700); display: inline-flex; }
.m02-ch__title { flex: 1 1 200px; min-width: 0; font-size: 13px; line-height: 20px; overflow-wrap: anywhere; }
.m02-ch__label { font-size: 11px; font-weight: 600; letter-spacing: .02em; color: var(--rv-text-muted); text-transform: uppercase; }
.m02-items--ch { padding: 0 6px 6px 22px; gap: 4px; }
.m02-les { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; padding: 8px 8px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface); min-width: 0; }
.m02-les:hover { border-color: var(--rv-neutral-300); }
.m02-les.has-issue { border-left: 3px solid var(--rv-warning); }
.m02-les__icon { flex: 0 0 auto; width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; border-radius: var(--rv-radius-control); background: var(--rv-primary-50); color: var(--rv-primary-800); }
.m02-les__icon--pdf { background: var(--rv-info-bg); color: var(--rv-info); }
.m02-les__icon--link { background: var(--rv-neutral-100); color: var(--rv-neutral-700); }
.m02-les__icon--quiz, .m02-les__icon--assignment { background: var(--rv-violet-bg); color: var(--rv-violet); }
.m02-les__body { flex: 1 1 240px; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.m02-les__title { font-size: 13px; line-height: 20px; font-weight: 500; overflow-wrap: anywhere; }
.m02-les__no { display: inline-block; min-width: 28px; color: var(--rv-text-muted); font-variant-numeric: tabular-nums; font-weight: 400; }
.m02-les__meta { font-size: 12px; line-height: 18px; color: var(--rv-text-secondary); overflow-wrap: anywhere; }
.m02-flags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 2px; }
.m02-flags:empty { display: none; }
.m02-move { display: inline-flex; gap: 2px; flex: 0 0 auto; }
.m02-node__acts { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 2px; flex: 0 0 auto; margin-left: auto; }
.m02-grip { flex: 0 0 auto; display: inline-flex; color: var(--rv-neutral-400); cursor: grab; }
[draggable="true"]:active .m02-grip, [draggable="true"]:active > .m02-grip { cursor: grabbing; }
.m02-node.is-hidden > .m02-les__body, .m02-node.is-hidden > .m02-sec__head .m02-sec__title, .m02-node.is-hidden > .m02-ch__head .m02-ch__title, .m02-les.is-hidden .m02-les__title { color: var(--rv-text-muted); }
.m02-les.is-hidden { background: var(--rv-neutral-50); border-style: dashed; }
.m02-empty-drop { padding: 12px; border: 1px dashed var(--rv-neutral-400); border-radius: var(--rv-radius-card); background: var(--rv-neutral-50); color: var(--rv-text-muted); font-size: 12px; text-align: center; }
.is-dragging { opacity: .45; }
.m02-les.is-drop-before, .m02-ch__head.is-drop-before, .m02-sec__head.is-drop-before { box-shadow: inset 0 3px 0 var(--rv-primary-700); }
.m02-les.is-drop-after, .m02-ch__head.is-drop-after, .m02-sec__head.is-drop-after { box-shadow: inset 0 -3px 0 var(--rv-primary-700); }
.m02-ch__head.is-drop-into, .m02-sec__head.is-drop-into, .m02-empty-drop.is-drop-into { outline: 2px dashed var(--rv-primary-700); outline-offset: -2px; background: var(--rv-primary-50); }

/* drawers (section/chapter/lesson) */
.m02-dform { display: flex; flex-direction: column; gap: 12px; }
.m02-dfield { min-width: 0; }
.m02-dgrid { gap: 12px; }
.m02-dsect { margin: 0; padding: 12px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.m02-dsect > legend { padding: 0 6px; font-size: 13px; font-weight: 600; color: var(--rv-text-primary); }
.m02-details > summary { cursor: pointer; font-size: 13px; color: var(--rv-link); min-height: 32px; display: flex; align-items: center; }
.m02-details[open] > summary { margin-bottom: 8px; }
.m02-details > .rv-field + .rv-field { margin-top: 12px; }
.m02-filerow { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; min-height: 40px; padding: 6px 10px; border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); background: var(--rv-surface); }
.m02-filerow__name { flex: 1 1 160px; min-width: 0; font-size: 13px; overflow-wrap: anywhere; }
.m02-attach { list-style: none; margin: 0 0 8px; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.m02-dfoot-left { margin-right: auto; }

/* ---------------------------------------------------------------- learner preview (modal) */
.m02-pv { display: flex; flex-direction: column; gap: 16px; }
.m02-pv__hero { display: grid; grid-template-columns: minmax(0, 320px) minmax(0, 1fr); gap: 16px; align-items: start; }
.m02-pv__cover .rv-thumb { width: 100%; height: auto; aspect-ratio: 16 / 9; }
.m02-pv__cover .rv-thumb img { width: 100%; height: 100%; object-fit: cover; }
.m02-pv__info { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.m02-pv__badges { display: flex; flex-wrap: wrap; gap: 4px; }
.m02-pv__title { margin: 0; font-size: 20px; line-height: 28px; font-weight: 600; overflow-wrap: anywhere; }
.m02-pv__short { margin: 0; color: var(--rv-text-secondary); font-size: 14px; line-height: 22px; }
.m02-pv__ins { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.m02-pv__insone { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; }
.m02-pv__meta { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 12px; color: var(--rv-text-secondary); }
.m02-pv__meta > span { display: inline-flex; align-items: center; gap: 4px; }
.m02-pv__pricebox { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 12px; padding: 10px 12px; border-radius: var(--rv-radius-card); background: var(--rv-primary-50); }
.m02-pv__price { font-size: 20px; line-height: 28px; font-weight: 600; color: var(--rv-primary-900); font-variant-numeric: tabular-nums; }
.m02-pv__list { color: var(--rv-text-muted); font-variant-numeric: tabular-nums; }
.m02-pv__cta { margin-left: auto; padding: 6px 14px; border-radius: var(--rv-radius-control); background: var(--rv-primary-500); color: var(--rv-on-primary); font-size: 13px; font-weight: 500; opacity: .75; }
.m02-pv__sect { display: flex; flex-direction: column; gap: 8px; }
.m02-pv__checks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 16px; }
.m02-pv__checks li { display: flex; gap: 6px; align-items: flex-start; font-size: 13px; line-height: 20px; }
.m02-pv__checks svg { color: var(--rv-success); flex: 0 0 auto; margin-top: 2px; }
.m02-pv__desc { font-size: 14px; line-height: 22px; }
.m02-pv__desc img { max-width: 100%; height: auto; }
.m02-pv__outline { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.m02-pv__sec { border: 1px solid var(--rv-divider); border-radius: var(--rv-radius-card); overflow: hidden; }
.m02-pv__sechead { display: flex; flex-wrap: wrap; gap: 6px; align-items: baseline; padding: 8px 12px; background: var(--rv-neutral-50); font-size: 13px; }
.m02-pv__secno { font-size: 12px; color: var(--rv-text-muted); }
.m02-pv__sec ul { list-style: none; margin: 0; padding: 0; }
.m02-pv__chapter { padding: 6px 12px 0; }
.m02-pv__chtitle { display: block; font-size: 12px; font-weight: 600; color: var(--rv-text-secondary); padding: 4px 0; }
.m02-pv__chapter ul { padding-left: 8px; border-left: 2px solid var(--rv-divider); }
.m02-pv__lesson { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; padding: 8px 12px; border-top: 1px solid var(--rv-divider); font-size: 13px; }
.m02-pv__lesson > svg { color: var(--rv-text-muted); }
.m02-pv__lesson.is-open > svg { color: var(--rv-primary-700); }
.m02-pv__ltitle { flex: 1 1 200px; min-width: 0; }
.m02-pv__lesson.is-locked .m02-pv__ltitle { color: var(--rv-text-secondary); }
.m02-pv__ldur { font-size: 12px; color: var(--rv-text-muted); font-variant-numeric: tabular-nums; }
.m02-pv__lock { display: inline-flex; color: var(--rv-text-muted); }

/* impact + publish dialogs */
.m02-impact { display: flex; flex-direction: column; gap: 10px; }
.m02-impact__stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.m02-impact__list { margin: 0; padding-left: 18px; font-size: 13px; line-height: 20px; }
.m02-pubopt { border: 0; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }

/* ---------------------------------------------------------------- responsive (§9) */
@media (max-width: 1199px) {
  .m02-stepper__list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .m02-step:nth-child(3)::after { display: none; }
}
@media (max-width: 767px) {
  .m02-stepper { display: none; }
  .m02-stepm { display: block; }
  .m02-hide-sm { display: none !important; }
  .m02-actions { bottom: calc(var(--rv-mobile-nav-height) + env(safe-area-inset-bottom)); padding: 8px 0; margin-left: calc(-1 * var(--rv-content-padding-mobile)); margin-right: calc(-1 * var(--rv-content-padding-mobile));
    padding-left: var(--rv-content-padding-mobile); padding-right: var(--rv-content-padding-mobile); box-shadow: 0 -4px 12px rgba(17, 24, 39, .06); }
  .m02-actions__left { flex: 0 0 auto; }
  .m02-actions__right { flex: 1 1 100%; justify-content: stretch; }
  .m02-actions__right > .rv-btn { flex: 1 1 auto; }
  .m02-cover__empty { width: 100%; max-width: 320px; }
  .m02-cover__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .m02-ins__row { flex-wrap: wrap; }
  .m02-ins__role { flex-basis: 100%; }
  .m02-rbar { top: 60px; }
  .m02-les { padding: 8px 6px; }
  .m02-les__body { flex-basis: calc(100% - 80px); }
  .m02-node__acts { margin-left: 0; }
  .m02-items--ch { padding-left: 8px; }
  .m02-pv__hero { grid-template-columns: minmax(0, 1fr); }
  .m02-pv__checks { grid-template-columns: minmax(0, 1fr); }
  .m02-impact__stats { grid-template-columns: minmax(0, 1fr); }
  .m02-insname { max-width: none; }
}
@media (pointer: coarse) {
  .m02-rte__btn, .m02-sec__toggle { width: 44px; height: 44px; }
  .m02-switch, .m02-chipcheck { min-height: 44px; }
  .m02-rte__body { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  .m02-step__btn { transition: none; }
}